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revision 1.8 by adcroft, Wed Jul 1 22:49:29 1998 UTC revision 1.752 by jmc, Tue Dec 5 22:15:47 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 CG2D: use pre-computed solver main-diagonal (stored in common block);
8      this affects truncation error ; generate new output file for exp. which
9      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
10        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
11        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
12        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
13        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
14        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
15    o start implementation of deep-atmosphere and anelastic formulation
16    o verification: remove 2nd copy of input files and use script "prepare_run"
17      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
18    o mom_common/vecinv/fluxform: fix a few initialisation isssues
19    o profiles: fix for multithreaded case
20    
21    o diagnostics: rename few diags:
22      s/'PRESSURE'/'RCENTER '/g
23      s/'TICE    '/'oceFreez'/g
24      s/'TAUX    '/'oceTAUX '/g
25      s/'TAUY    '/'oceTAUY '/g
26      s/'SWFLUX  '/'oceQsw  '/g
27      s/DIFx/DFxE/g
28      s/DIFy/DFyE/g
29      and add few ocean-forcing diagnostics:
30      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
31    o modifications to pkg/seaice/growth.F and budget.F, which change results of
32      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
33      as actual snow thickness.  It now refers everywhere to effective snow
34      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
35    
36    checkpoint58r_post
37    o modifications to pkg/seaice/growth.F, which change results of
38      lab_sea experiment: fixes pertain to melting snow over open water, to
39      masking EVAP under sea ice, and to using the correct AREA variable for
40      computations of EVAP, PRECIP, HSNOW, and GHEFF
41    o add ability to read bathy, salt, and theta using MNC (off by def)
42    o add flooding algorithm and advection of HSNOW for pkg/seaice;
43      both are turned off by default and do no change any results
44    o seaice advection with pkg/thsice: a step toward the use of non-linear
45      advection scheme, but #ifdef or commented out for now (requires more EXCH).
46    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
47      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
48      in natl_box (affects results @ truncation level: update output.txt)
49    o multi-threading and IO:
50      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
51      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
52        (needed to work with SingleCpuIO): tested in all verif. exp.
53    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
54      affects the results (but none of the verification test uses this scheme).
55    o Adding some pkg/diagnostics capability to pkg/seaice
56      (will certainly be subject to changes)
57    o ctrl: adding new control variables:
58      lwflux, lwdown, evap, snowprecip, apressure, runoff
59    
60    checkpoint58q_post
61    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
62      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
63      high_res_cube configuration by 4% on Columbia.
64    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
65      add (in global_with_exf/code) a version of EXF_INTERP_READ without
66      dynamical allocation (seems to work in multi-threaded).
67    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
68      single CPU io) so that TAF does not have to see EESUPPORT.h
69    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
70    
71    checkpoint58p_post
72    o obcs: stop if obcs is used with useCDscheme = .true.
73    o shelfice:
74     - fix a sign error so that no slip at shelfice interface works
75     - remove stop for combination non-hydrostatic code and shelfice. That does
76       not mean, that the results are correct, but at least they are numerically
77       stable
78    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
79    o added adjoint exch routined for all exch*3d* routines
80      and updated flow directives
81    
82    checkpoint58o_post
83    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
84      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
85    o change controling S/R for writing pickup file (new S/R do_write_pickup)
86      and clean-up reading/writing of pickup files.
87    o fix local version of read/write pickup (NH part) in rotating_tank/code
88    o simplify EXCH interface:
89     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
90     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
91    o added the regrid package
92    o shelfice:
93     - add a simple boundary layer scheme to reduce noise
94     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
95    
96    checkpoint58n_post
97    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
98       local variable (not in common block).
99    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
100      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
101      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
102        to work with SingleCpuIO.
103    o add "_d 0" to real constant of pkg/cfc subroutines ;
104       update exp. cfc_exemple & tutorial_cfc_offline output files.
105    o multi-threading and IO:
106      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
107        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
108      - barrier before and after reading.
109      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
110      - avoid using MDS_WRITELOCAL for LAND pkg output.
111      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
112        common-block variables ; Allows multi-threading with master-thread IO.
113    o change default MAX_NO_THREADS from 32 to 4 ;
114      and stop cleanly when MAX_NO_THREADS is too small.
115    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
116    
117    checkpoint58m_post
118    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
119       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
120    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
121       keep global_ocean.90x40x15 (for AD testing) with former secondary test
122       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
123    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
124        add MITgcm_tutorials (= code + all the tutorials)
125    o ecco, option to compute cost for total ssh (mean+anom)
126    o consistent with addition of ptracer and ssh in pkg/profiles
127    o profiles: adding ptracer and ssh
128    o testreport: change multi-test output-file name
129      (from output.txt.{name} to output.{name}.txt)
130    o profiles: now ok for mutli-tiles case
131    o seaice: add 4 parameters for different advection schemes for area,
132      (effective) seaice thickness, enthalphy, and snow height. Their default
133      is the standard parameter SEAICEadvScheme
134    o calc_gw:
135     - add cosFacU in zonal viscous flux (harmonic.visc.).
136     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
137       of tutorial_plume_on_slope.
138    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
139    o calc_gw: true flux-form, account for horizontal grid spacing.
140      update rotating_tank results, but not plume_on_slope (affected at
141      truncation level, 11 digits).
142    
143    checkpoint58l_post
144    o calc_gw:
145     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
146     - remove side-drag for now (need to fix it); update plume_on_slope results.
147     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
148    o commit code to make SST/SSS weights spatially variable
149      (based on either variable in-situ or variable initial T/S weights)
150    o pkg/ecco:
151      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
152        now based on horizontally varying weights wthetaLev, wsaltLev
153      * cost_averagesflags now returns year indices in addition to day, month
154      * sflux balance is performed on annual basis
155        (sflxumm, sfluxmm2, bal_sfluxmm)
156      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
157        including separate counting and multipliers
158    o pkg/rbcs
159      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
160    
161    checkpoint58k_post
162    o testreport:
163     - always build in dir. "build" (if not there, mkdir build instead of building
164       & running in input)
165     - run in dir run (if it exists), in build otherwise.
166     - call prepare_run (if input/prepare_run exists)
167     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
168    o pkg/exf modifications to interpolation and rotation routines for more
169       reasonable treatment of North Pole singularity: for tracers North Pole
170       value is set to northernmost zonal-mean value, for zonal velocity it is
171       set to zero, and for meridional velocity it is set to northernmost value.
172    o pkg/exf/exf_check_range.F
173     - add tile index to diagnostics and move stop statement to the very
174       end of the routine.
175    o pkg/diagnostics: (diagnostics_main_init.F)
176      define title of isomorphic variables according to the current config.
177    o pkg/thsice with pkg/seaice dynamics:
178    - fix domain of computation (interior only, required for exf) and do exchanges
179    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
180    o towards a standard way of dealing with multi-threading in MONITOR
181      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
182    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
183       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
184    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
185    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
186    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
187       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
188    o tracer advection:
189     - clean-up and simplify calc_common_factors.F
190     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
191       advection subroutine (but still not used within DST advection S/R)
192    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
193    
194    checkpoint58j_post
195    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
196      from file (collects calls previously in FORWARD_STEP)
197    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
198    o adjoint store dir. adjusted accordingly
199    o genmake2
200      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
201    
202    checkpoint58i_post
203    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
204      on wind stress (SEAICEstressFactor defaults to 1.)
205    o Total number of Timers is finite (<=40): comment out 2 non-essential one
206      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
207    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
208      on CS-grid: no longer loosing mass.
209    o exf & curvilinear-grid: no longer modify longitude xC & xG.
210    o pkg/ggl90: fix sloppy output and fix a bug
211    o pkg/seaice: added SEAICEuseEVPpickup parameter
212      - Set to false in order to start EVP solver with
213        non-EVP pickup files when using SEAICEuseEVP
214      - fix sign error in diffusion in seaice_calc_rhs
215    
216    checkpoint58h_post
217    * Modifications for bottom topography control
218      o replace hFacC by _hFacC at various places
219      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
220      o add non-self-adjoint cg2d_nsa
221      o update autodiff support routines
222      o re-initialise hfac after ctrl_depth_ini
223      o works for 5x5 box, doesnt work for global_ocean.90x40x15
224    * Adding verification for 5x5 box (4-layer) bottom topography control
225    
226    checkpoint58g_post
227    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
228       used for mean seasonal cycle, mean diurnal cycle); add an example
229       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
230    o pkg/ggl90:
231      - add parameter (minimum surface kinetic energy)
232      - fix bug (avoiding division by zero)
233    o couple pkg/thsice to pkg/seaice:
234      - modify advection in seaice to accomodate new scalar fields to be advected
235      - only muliDimAdection scheme work with seaice/thsice
236      - mapping of thsice-variables to seaice-variables, back and forth
237      - does not break the verification experiments, but does not give the
238        desired results either
239    o pkg/seaice
240      - make (default) second order advection a bit less confusing?
241    
242    checkpoint58f_post
243    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
244      to pkg/seaice):
245      - new routines thsice_map_exf and thsice_get_exf provide the interface
246      - add an additional formal parameter to thsice_solve4temp
247    o pkg/exf:
248      - add new fields wspeed, snowprecip (to be able to couple to thsice)
249      - correct Stefan-Boltzmann constant
250      - new parameter for longwave surface emittance
251      - separate some stuff from exf_bulkformulae into new routines  
252        exf_radiation, exf_wind
253      - add new parameters and constants: longwave emissivity for ocean, ice
254        and snow, evaporation parameters over ice
255      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
256        either wind from stress or stress from wind
257    o pkg/thSIce:
258    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
259    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
260       and THSICE_CALC_THICKN
261    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
262    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
263      to make debugging easier.
264    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
265    o pkg/bulk_force:
266      - clean-up comments and parameters ;
267      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
268    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
269      generate new output for test-experiment: aim.5l_cs.thSI
270    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
271      testreport accordingly
272    
273    checkpoint58e_post
274    o SEAICE_CGRID adjoint done
275    o R_STAR adjoint implemented.
276      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
277      * need to sort out init. of h0facc, etc.
278    o Make pkg/profile fully independent of ecco,cost, etc. stuff
279      to be able to use it in pure forward.
280    
281    checkpoint58d_post
282    o upgrade simple test-experiment to tutorial example:
283     step.1: duplicate the experiment and (step.2) will remove the old copy.
284      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
285      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
286      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
287      tutorial_global_oce_biogeo    <- copy of dic_example
288      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
289      tutorial_plume_on_slope       <- copy of plume_on_slope
290      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
291      tutorial_global_oce_optim     <- empty for now (David ?)
292      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
293     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
294    o correct a sign problem in cost_scat.F
295    o obcs and ptracers: fix boundary conditions for advections schemes
296      with larger stencil
297    o thsice adjoint: start
298    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
299      completeness
300    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
301      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
302    o ptracers adjoint:
303      * avoid extensive recomputatations
304      * fix missing re-init. of gptr (missed by TAF)
305    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
306      me to turn off the excessive output to STDOUT that this package produces
307    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
308      and add those terms in Vector-Invariant formulation.
309    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
310      if the control period (xx_hfluxperiod etc) is 0
311    o in profiles pkg, clean routines and fix details
312    o in ecco pkg, reading ssh data:
313      fix problem in case the model does not start at iter0=0
314    o fix mnc-pickup/restart for ptracers
315    o new package prifiles:
316      code to compute profile-based cost by Gael Forget
317      (modifs in ecco, ctrl, autodiff)
318    o Benign bug fix in initialization (spotted by M. Mazloff) of
319      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
320    
321    checkpoint58c_post
322    o adjoint: finish NLFS adjoint and provide reference output in
323      verification/global_ocean.90x40x15/results_ad_nlfs
324    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
325      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
326      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
327      with SEAICE_CGRID defined.
328    o move calendarDumps from "data" to "data.cal" and clean-up the code
329      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
330    o add useEXF & useCAL flags (for now, set in hard-coded way)
331    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
332      (were missing in NH mode, and wrong in quasihydrostatic mode).
333      waiting for Chris updated version of calc_gw to add those CALLs.
334    o fix bug in quasihydrostatic S/R ;
335      add a test for this option: global_ocean.90x40x15.qshyd
336    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
337      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
338    o add on/off flag useOffLine for package OFFLINE
339    o seaice:
340      - modify advection so that it works also on the C-grid
341      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
342        problem in multi-tile runs with C-grid
343      - add flags for clipping ice velocities and/or masking solver forcing
344      - fix drag (ocean on ice) formulation and a bug that caused noise in the
345        C-grid solver
346      - added a few comments to seaice_diffusion.F
347      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
348        are now exclusive)
349      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
350        required re-ordering the code a little:
351       + make DAIRN global variable (defined in SEAICE)
352       + move computation of the viscosities eta and zeta into a new separate
353         routine (because I need to recompute them in seaice_ocean_stress.F)
354    
355    checkpoint58b_post
356    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
357      update output.txt of exp. aim.5l_cs.thSI
358    o various mnc cleanups and improvements:
359      + shrink lookup tables by factor of ~4
360      + better error reporting when running out of lookup space
361      + able to handle longer path/file names (up to 500 chars)
362    o adjoint:
363      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
364      - TBD: "hidden" mom_vecinv recomp. in dynamics
365    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
366     (allow to differentiate between forcing components using new integer flags:
367      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
368     and add new flag to put Dissipation tendency out of Adams-Bashforth.
369    o ecco
370      - enable trend removal from SSH anomaly obs.
371    o adjoint
372      - a fix for PmEpR when #undef EXACT_CONSERV
373      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
374      - try to fix "hidden" recomp. in forward_step for NLFS
375        (NLFS seems broken sometimes after I checked it in)
376    o seaice:
377     - add c-grid version of the dynamic solver:
378       + three new routines that are the c-grid substitute lsr, dynsolver
379         and ostres
380       + put a few fields that were local to dynsolver into global common
381         blocks, so that I can move the computation of stresses etc into
382         seaice_lsr (saves coding but may break the adjoint).
383     - replace more hardwired parameters by runtime parameters
384     - add ice masks that mask the rhs of the implicit solvers where there
385       is no ice (commented out in seaice_dynsolver, because i am not sure
386       if this works properly), eventually this should replace the clipping
387       of ice velocities in seaice_dynsolver to +/-40cm/s.
388    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
389      include it only where its needed
390    o move balancing of fluxes before the call of external_forcing_surf
391    o seaice:
392      - correct units of turning angles (now they are really in degrees)
393      - move computation of GWATX/Y out of main routine into dynsolver
394      - initialize GWATX/Y in seaice_init
395    o Apply mask on Fresh-Water flux (needed for SSH forcing).
396      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
397    o seaice: add runtime flags for turning angles (default to zero)
398    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
399      and trend from exf forcing and ctrl control adjustments
400    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
401      (since checkpoint57x_post)
402    o change the default rotation period to 86164.s = the Earth rotation
403    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
404      and based on a reference stratification. Tested within hs94.cs-32x32x5.
405    o seaice advection: add code for choosing between the default (2nd order
406      central differences) and multiDim advection schemes provided by
407      pkg/generic_advdiff
408    o seaice:
409      - removed all references to SEAICE_GRID.h fields from
410        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
411        (cubed-sphere configuration will change a little)
412      - grid computations in seaice_init are obsolete now.
413      - cleaned up code a little so that is easier to read (hopefully).
414      - added new (better?) discretizations of default advection and diffusion
415        (turn on with SEAICEuseFluxForm)
416      - replace 1 in 3d global fields by kSurface in growth.F
417      
418    checkpoint58a_post
419    o seaice:
420      - bug fix in advect.F
421    o shelfice:
422      - separate shelfice load anomaly from pload (breaks with time
423        dependent forcing), => introduce constant field shelficeLoadAnomaly.
424        Its default is 0., but it may be computed more cleverly from (unknown)
425        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
426        done offline. A good approximation of the pressure load anomaly is
427        necessary to avoid large initial adjustment processes underneath
428        deep-reaching shelfice.
429      - small fix in ISOMIP shelfice_thermodynamics
430      - add more sophisticated thermodynamics of Hellmer (1989), this is
431        now the default
432      - give a few constants more intuitive names
433    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
434      if bulk formulae are used in long integration (especially EmPmR). Turn
435      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
436      if balancePrintMean, the imbalance that is substracted is printed to
437      STDOUT.
438    o fix bug (typo) in obcs_apply_eta.F
439    o add a new package shelfice which enables us to model the circulation
440      underneath shelf-ice with draughts of hundreds of meters.
441     - works
442     - to do: + include improved thermodynamics
443              + check whether kSurfC (from model/inc/SURFACE.h) can be used
444                instead of new field kTopC
445              + can we use topoFile, Ro_surf and existing code in ini_depth.F
446                instead of new field R_shelfIce and new code in ini_depth.F
447                and ini_mask_etc.F?
448              + adjust vertical mixing schemes?
449    o seaice pkg:
450     - add a cpp-flag to include a simple formula for a salinity dependent
451       freezing point of sea water at the surface
452     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
453       meridional stresses are now different (and hopefully correct)
454    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
455       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
456       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
457    o pkg/diagnostics: add options and parameters for regional-statistics
458       diagnostics ; define regions by reading a region-mask from a file
459       (might add other options later)
460    o pkg/bulk_force:
461     - add option and parameters to use AIM surface-flux formulae.
462     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
463       others forcing fields (defined in PARM05, parameter file "data") are loaded
464       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
465     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
466     - use the right EXCH call for uwind,vwind (to work on CS-grid).
467     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
468       and parameters (note: calcWindStress replaces .NOT.readwindstress).
469     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
470    
471    checkpoint58
472    o add "--embed-source" option to genmake2 which, when the supporting
473      tools can be compiled (as determined by genmake2) will turn on the
474      embed_files package which then embeds the entire MITgcm source code
475      (*.[fFhc] + Makefile) used for the build within the executable
476      - requested by CNH but off by default
477      - adds a paltry <9MB to the mitgcmuv executable in most cases
478      - only writes the output when useEMBEDSRC in eedata is true
479    o clean up 3-dim. relaxation codes:
480      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
481      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
482      * Thanks to Tom Haine for testing!
483    
484    checkpoint57z_post
485    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
486      affects output (@ truncation level) of exp. plume_on_slope ; updated.
487    o fix the pickup behavior for obcs in combination with ptracers
488    o fix a bug in ptracers_external_fields_load
489    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
490      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
491    o transfered surface NH pressure to eta field (if exactConserv).
492    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
493         and update lab_sea output.txt file.
494    o completing 3-dim. relaxation code: additional term
495         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
496      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
497      * At compile time, in "EXF_OPTIONS.h" set
498          #define  ALLOW_CLIMTEMP_RELAXATION
499          #define  ALLOW_CLIMSALT_RELAXATION
500      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
501          tauThetaClimRelax3Dim = 15552000.0,
502          tauSaltClimRelax3Dim  = 15552000.0,
503      * 3 cases:
504          1) Use a constant-in-time 3-dim. field
505          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
506          3) Real-time relax. to time-evolving prescribed field
507    o Adding Laplacian-type smoothness constraint on
508      initial and boundary (forcing) controls (ic, bc)
509      * enable at compile-time via
510        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
511      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
512      * Absolute scale somewhat unclear so far
513      * no area weighting was included since no other cost term does so far
514    
515    checkpoint57y_post
516    First step for a NLFS adjoint
517    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
518    o new init. routines for calc_r_star, calc_surf_dr
519    o still need to deal with ini_masks_etc
520    o testreport seemed happy
521    checkpoint57y_pre
522    
523    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
524    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
525    o add new offset feature to offline pkg (plus minor cleanup)
526    o cfc fixes for final year of integration
527    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
528      be in GCHEM_OPTIONS).
529    
530    checkpoint57x_post
531    o fix testreport Pb in multiple test experiment.
532    o cleanup our namelist syntax in verification:
533      - make it more F95 standards compliant (some work still needed)
534      - allows the vast majority of our tests to work with gfortran
535    o Non-Hydrostatic:
536     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
537     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
538    o Allow to apply AB on T,S rather than on AB(gT,gS):
539     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
540     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
541       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
542     - need a "clever" read_pickup to restart from the other AB formulation
543    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
544    o remove some unused variables (reduces number of compiler warnings)
545    o adjoint
546      * Disable useVariableViscosity for adjoint for time being
547        (there are a number of extensive recomputations)
548      * Initialize certain variables needed for adjoint
549    
550    checkpoint57w_post
551    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
552                 fix the singleCpuIO RS version of MDSWRITEFIELD
553       and add a WARNING if using globalFiles=T with multi-processors.
554    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
555      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
556    o tracer advection scheme:
557      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
558       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
559       was not very convenient).
560      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
561       (further tests needed for the implicit DST & Flux-Limiter schemes).
562    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
563      and sRef for convenience, handy, when you want to initialize
564      ptracers in a large domain with a constant non-zero value. Also,
565      untangle ptracers_init.F a little.
566    
567    checkpoint57v_post
568    o change dome exp. to use variable viscosity in side-drag terms.
569    o remove all the files from the cfc_offline test since they are now
570      incorporated into tutorial_cfc_offline which has been producing
571      identical results for a few days of testing
572    o add new parameter: sideDragFactor to enable half-slip-side BC
573      and change side-drag S/R to use viscosity from mom_calc_visc
574      (can switch back by setting sideDragFactor=0.); affects results at
575      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
576       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
577    o vorticity & strain are now computed without masking, to account for
578      no-slip-side BC in variable viscosity calculation ; mask is applied
579      anyway later on, before computing advection/coriolis terms.
580    o modify exp4 to test new obcs support for reading from external files
581      and for passive tracers
582    o fix behavior of ptracers_monitor when monitor output is written to a
583      netcdf-file; still not independent of monitor.F (writes in the same
584      file).
585    o change default value of tRef (put a uniform, meaningful value for ocean
586      & atmos) and initialize sRef (was missing, as Martin mentioned).
587    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
588      to be proportional to enstrophy dissipation length.  Thus,
589       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
590      This is now consistent with Smagorinsky and with the manual.
591    
592    checkpoint57u_post
593    o OBCS and PTRACERS: add open boundary support for passive tracers
594      - either use homogenous (pseudo) v.Neumann conditions or prescribe
595        OB-values from file; this is not different from the way theta and salinity
596        are treated
597      - however, Orlanski-radiation conditions are not supported, and the model
598        will stop if you use pTracers and Orlanski at the same time.
599      - beefed up the rountine obcs_external_fields_load: now only those open
600        boundary values are overwritten with values from files for which there
601        are really files, otherwise the OB-fields remain untouched. This makes
602        it possible to use different OBs at different ends of the domain (as
603        with EXF)
604    o reduce number of exch calls in shap_filt (s2).
605    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
606      truncation level) 4/5 MLAdjust test results (11&12 digits match).
607    
608    checkpoint57t_post
609    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
610    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
611      same truncation, independent of the face number: affects affects several
612      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
613    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
614      note that biharmonic viscosity + no-slip was not tested in any experiment.
615    o fix bug in non-linear free-surf side-drag ; generate new output for
616      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
617    o make mnc honor the writeBinaryPrec flag for most kinds of output
618    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
619    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
620      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
621    o add brackets in multi-terms sum to get same truncation, independent of
622      the face number (manage to get exactly same value of gU,gV at the cs-edge)
623      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
624    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
625      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
626      a maximum grid-scale Reynolds number.  Also, changes all length calculations
627      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
628      Suggested values of viscosity parameters found in mom_calc_visc.
629      Many new viscosity diagnostics available.
630    
631    checkpoint57s_post
632    o Add clearing-house for viscosity calculations, mom_calc_visc and
633      correct numerous bugs in LeithD and Smagorinsky discretizations.  
634      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
635      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
636      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
637      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
638      The Strain-Tension form is now called with useStrainTensonVisc=.true.
639      ViscAhStrain and viscAhTension are now retired.
640    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
641    o In response to JMC's bug report, genmake2 now ignores any soft-links
642      that it finds in the *current* directory when searching for files.
643      Soft-links found in any other source directories will still work as
644      they did before.
645    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
646      a C routine to unlimit the stack size
647    o mnc-ify pkg/aim snapshot vars
648    o mnc-ify pkg/land as requested by Daniel
649    o various changes to mnc including:
650      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
651      - output can now be grouped so that all files within a group
652          change the ITER portion of their names in lock-step together
653      - can now read ("global") PER-FACE (in addition to PER-TILE) files
654          and works with both EXCH1 and EXCH2 (but needs more testing)
655      - writing works for all verification test cases w/ g77 on Linux
656    
657    checkpoint57r_post
658    o make MNC variable initialization happen earlier
659    o add diagnostics for (almost) each term of the momentum Eq.
660    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
661    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
662    o remove MINIMAL_TAVE_OUTPUT option ;
663      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
664    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
665      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
666    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
667    o add time-dependent SST, SSS control
668    o cost terms in ecco/ modularized (new cost_generic.F)
669    o cost_averages routines are modularized (new cost_averagesgeneric.F)
670    o new infrastructure for seaice model vs. obs misfits in seaice/
671      * driver from the_main_loop.F is seaice_cost_driver.F
672      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
673      * gradient check in Exp. 6a of natl_box_adjoint/
674    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
675      (see README file)
676    
677    checkpoint57q_post
678    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
679    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
680      - bug was reported by Jean-Michel and Ian Fenty
681    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
682      update exp. cpl_aim+ocn output.
683    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
684      Needed for high-res. runs with large global files
685      to be able to limit tapelev size
686    o Changed some tests for adjoint:
687      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
688      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
689      * global_ocean.90x40x15/ back to default 3-level checkpointing
690    o Modifications to enable scripted COMMON to MODULE conversion
691      * verification/OpenAD/code/ has necessary scripts and description;
692      * converts, compiles and runs successfully;
693    
694    checkpoint57p_post
695    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
696    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
697      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
698    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
699    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
700      (was already the case for dissipation with mom_vecinv,
701       and also the case for grad.PhiHyd when staggered-timeStep)
702      This will allow to put dissipation out-off the AB time-stepping.
703     Unfortunately, affects truncation error. Update output of exp. that "fails"
704      (cg2d matching number) and leave the others for later: front_relax(10),
705      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
706      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
707    
708    checkpoint57o_post
709    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
710      (2) its ready to be documented during the 20050801 DocFest
711    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
712      for ideal_2D_oce and lab_sea on linux_ia32_g77
713    o set to #undef CTRL_SET_OLD_MAXCVARS_30
714      in global1x1_tot/code_seaice_adj to access indices 32, 33
715      (worth another tag)
716    
717    checkpoint57n_post
718    o adding precip control xx_precip 32
719    o adding swflux control xx_swflux 33
720    o Replacing 10 forcing penalty cost routines by 1 generic.
721    o Implementing partitioning in time-mean and variable adjustment
722      for atmos. state.
723    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
724    o in natl_box_adjoint:
725      * updated exp 1 to 10
726        (but does not have time-mean vs. variable split results yet)
727    o updated global1x1/*_seaice_adj/
728      to incorporate latest changes
729    o enable useSingleCpuIO for mdsio vector routines
730      (applies in particular to tapelev I/O)
731    o removed inefficient K-loop in all active_file*control*.F
732    
733    checkpoint57m_post
734    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
735      and advect_cs (use EXCH-2 and standard cs-32 grid files).
736    o pkg/exch2: filling of face-corner halo regions is optional
737      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
738    
739    checkpoint57l_post
740     tag before updating tutorials (pre-release-2)
741    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
742       for output and interpolation of input fields onto model grid)
743    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
744       Affects results of exp. rotating_tank ; update output.txt.
745    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
746          and taking the square quantity and/or using a fraction-weight field.
747    o fix aim_diagnostics_init.F mate numbers.
748    o add mnc output capability to diagnostics/diagstat and update
749      our cvsignore files for the ACSII output generated
750    
751    checkpoint57k_post
752    o lab_sea now uses diagnostics package and provides a suite of
753      new EXF diagnostics output.
754    
755    checkpoint57j_post
756    o exf
757      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
758        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
759        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
760      * extended diagnostics output
761        - now includes all EXF variables
762        - hs, hl moved to common block
763        - separate S/R for diagnostics, called after ctrl vector is added
764        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
765        - EXFqnet contains true Qnet (i.e. includes qsw)
766      * updated verif. lab_sea, global_with_exf
767      * Rearranging hflux (exf_mapfields -> exf_getforcing)
768        to ensure that diagnostics sees a true EXFqnet
769    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
770    o diagnostics pkg: change pointers so that 1 diagnostic can be used
771      several times with different frequencies.
772    o mnc-ify the thsice package as requested by Daniel Enderton
773      - the monitor--MNC output needs work
774      - many attributes need to be added (most are currently blank)
775    o mnc-ify theaim_v23 package as requested by Daniel Enderton
776      - many attributes need to be added (most are currently blank)
777    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
778    o add Sadourny like discretization to the 4th.O vorticity advection scheme
779    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
780      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
781         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
782    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
783     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
784    
785    checkpoint57i_post
786    o Diagnostics package was changed: diagnostic allocation is now deactivated
787      by setting an empty file name in the namelist (used to be by setting 0 frequency)
788    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
789      add 1rst Order upwind vertical Shear.
790    o add a quick fix for A/B checkpointing in OFFLINE mode
791    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
792      end-run around the C/Fortran linking horror in eesup/src/timers.F
793    o added pkg/runclock: allows user to terminate run based on wall clock
794    o added non-hydrostatic scaling parameter: nh_am2
795    o pkg/my82: futile attempt to make results compiler-independent by adding
796      some "_d 0", etc. no effect.
797    o for mnc output, fill the 'T' coordinate var with myTime and create a
798      separate 'iter' variable for iteration count
799    o pkg/diagnostics:
800      add new capability: output of Global/Regional & per-level statistics ;
801      tested against monitor output (including land & thSIce) on various exp.
802    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
803    
804    checkpoint57h_done
805      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
806      data.diagnostics, data.gchem, data.ptracers) is done.
807    
808    o pkg/diagnostics: prepare for Global/Regional statistics.
809      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
810    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
811      and rename it: DIFFERENT_MULTIPLE
812    
813    checkpoint57h_post
814    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
815    o pkg/diagnostics: change output frequency, now in seconds (instead
816      of Nb of iterations). This requires to change data.diagnostics.
817    checkpoint57h_pre
818    
819    o in mnc, let the user create the output dir if both mnc_outdir_date
820      and mnc_outdir_num are false
821    o add fflags() to pkg/diagnostics which allows one to specify, on a
822      per-file basis, the file precision [default behavior is unchanged]
823    o added diagnostics to pkg/kpp, including computation of mixed layer
824      depth based on a temperature/density criterion
825    o updated verification/natl_box to test the new pkg/kpp diagnostics
826    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
827    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
828    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
829      not mnc -- this mistake was found by JMC and is now corrected
830    
831    checkpoint57g_post
832    o add Adams-Bashforth 3rd Order time stepping:
833      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
834      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
835    checkpoint57g_pre
836    
837    o make lambda[Theta,Salt]ClimRelax spatially varying
838      (default remains spatially uniform constant based on tau)
839    o added new control variables
840      * init. uVel, vVel, etanN
841      * lambda[Theta,Salt]ClimRelax
842    o separate masks used for ctrl_pack/unpack 'from write_grid' output
843      (suggested by G. Forget)
844    
845    checkpoint57f_post
846    o add parameter "baseTime" = model base time = time at iteration zero
847      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
848      account for baseTime shift
849    o move Coriolis arrays from PARAMS.h to GRID.h
850    checkpoint57f_pre
851    
852    o mnc-ifying the seaice package
853    o introduced an alternative length scale calculation for use in the limiting
854      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
855    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
856    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
857      as well as grad(vort3).  Made it compatible with both approximate form
858      for the cubed sphere and full form of these gradients.  Added flag
859      useFullLeith to select between approximate and full form.  
860    o add "d0" in getcon.F to reduce differences between compilers/platforms
861      update output.txt of exp. fizhi-gridalt-hs
862    o change port_rand funtion to allow to set the seed.
863    o fix obscure MNC bug involving conversion between reals and integers
864      - it caused no problems with certain (eg. gcc, ifc) compilers but the
865        new version is now more standards-compliant
866    o adjoint-related modifications
867      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
868      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
869      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
870    
871    checkpoint57e_post
872    o Adding eddy stress controls a la Ferreira et al.
873    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
874    
875    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
876      update output.txt of exp. fizhi-gridalt-hs
877    o add more "Z" dimensions and associated coordinate vars to MNC
878    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
879    o parameter calendarDumps: when set, approximate months (30-31 days) and years
880      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
881      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
882      months and years.  Requires pkg/cal.
883    o diagnostics: add pickup functionality
884      - off by default for backwards compatibility
885      - current version only uses MDSIO -- MNC will be added
886    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
887    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
888    
889    checkpoint57d_post
890    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
891    o modify verification/ideal_2D_oce so that it tests the creation of mnc
892      output from the diagnostics package
893    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
894    o make genmake2 more portable by using ".$FS" instead of ".f" for more
895      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
896    o add coordinate variables to the MNC output from the diagnostics package
897    o change MNC-flags default value: true when useMNC=TRUE
898    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
899      the ability (off by default) to read the grid information using MNC
900    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
901    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
902    o do snap-shot diagnostics at the middle of the time-interval (instead of
903      at the end).
904    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
905      new test for AIM with thSIce + slab-ocean
906    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
907    o move state variable diagnostics to the beginning of the time step ;
908      (note: still needs some work specially for snap-shot diagnostics)
909      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
910    
911    checkpoint57c_post
912    o Change testing option (-ieee) to get closer agreement between g77 & ifort
913    o generate new output.txt files on faulks with g77 & the new -ieee option
914    checkpoint57c_pre
915    
916    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
917      update output.txt of exp. global_ocean.90x40x15
918    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
919      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
920    o add saltFlux(+File) forcing capability with periodicExternalForcing
921    o allow to use pkg diagnostics for GM-Redi & ThSIce output
922    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
923    o improvements for the MNC output from DIAGNOSTICS:
924      - correct handling of the unlimitied dimension
925      - all dims now have associated coordinate variables
926      - variables located at U, V, and Corner ("Z") points are now written
927        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
928        *all* data points are output
929    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
930    o added pkg/seaice/seaice_monitor.F
931    o mdsio_readfield.F can now read files visible only to master MPI process.
932    o pkg/seaice: some test code for ice-modified ocean stress
933    o exf_getffields interpolation defaults to bilinear for all scalar forcing
934      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
935      spurious negative numbers for precipitation and humidity.  Will cause
936      some small numerical differences for integrations using pkg/exf/exf_interp.F.
937    o pkg/ctrl/
938      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
939        May be enabled via doPackDiag
940      *  introduce z-scaling of
941         + gradient (doZscalePack) and
942         + control (doZscaleUnpack)
943    o pkg/mdsio/
944      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
945      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
946    
947    checkpoint57b_post
948    o simplify options in diagnostics_fill arguments (remove weird combinations)
949    o fix MNC coordinate variables so that they now contain per-face index
950      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
951      general, EXCH2 grids are only aligned to a "local" coordinate system
952    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
953    o Implement instantaneous output within pkg diagnostics:
954      setting a negative frequency in data.diagnostics produces
955     "snap-shot" output (as opposed to time-average if freq > 0)
956    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
957      NOTE: change ptracer diagnostics name: use 2 characters to work with
958            more than 9 tracers. Add also diagnostics of advect & diffus flux.
959    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
960      becomes the coordinate variable for the 'T' dimension
961    o add CF-style coordinate variables to MNC
962      - just a first cut:  numbers are meaningless on the cubesphere and
963        missing along the T axis but otherwise it works!
964    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
965    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
966    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
967      this is based directly on what the model compute, so that the content of
968      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
969    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
970    o clean up build options files for SunOS, in particular
971      - remove -traditional from xmakedepend
972      - change -xarch=v9 to -xarch=native for f77
973      - restore use of make (not gmake)
974      - add CC=gcc if using g77
975    o changes per discussion of AM, JMC, & EH3 today:
976      - move redundant "grid" variables out of "state" -- in preparation of
977        creating proper CF-style coordinate variables and in recognition
978        that any/all grid variables can be easily copied (eg. w/NCO) from
979        the grid files into any of the other NetCDF files
980      - *always* output grid variables with MDSIO (this will eventually be
981        changed)
982      - output MNC grid file if useMNC is true
983    o every instance of _END_MASTER() has been found and replaced with
984      _END_MASTER( myThid ) in order to satisfy certain picky Sun
985      preprocessors
986    o re-arrange diagnostics pkg initialisation:
987     - allow each package to extend the available diagnostics list
988     - add some checking and fix small problems (multi-threaded, ...)
989     - new S/R diagnostics_fill (replace fill_diagnostics):
990       look through the short list of active diag. (instead of the long list)
991       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
992    
993    checkpoint57a_post
994    o this set of changes restores TAMC compatibility
995      tested for global_ocean.90x40x15 adjoint on trough
996      (what a pain)
997    
998    checkpoint57a_pre
999    o some modifs in tools/build_options for sunos
1000    o call ctrl_pack for ctrl at end for optimcycle=0
1001    
1002    checkpoint57
1003    o add horizontal bi-harmonic viscosity for vertical velocity
1004      - new parameter viscA4W (defaults to viscA4)
1005      - affects only non-hydrostatic code
1006      - to be done: no-slip lateral boundary conditions
1007    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1008    o implement Implicit Vertical advection for pTracers
1009    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1010      (implemented also for implicit vertical diffusion & advection)
1011    o OBCS: extend application of tracer open boundary conditions
1012      to a strip beyond the boundary of width Olx/Oly
1013    o add call monitor to TAF set of required calls (flow directives)
1014      and include in natl_box_adjoint
1015    o untangle a few ifdefs related to cost, ctrl, autodiff
1016      untangel a few ALLOW_ECCO_OPTIMIZATION
1017    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1018      (theta2, salt2 in ecco_cost_weights)
1019    
1020    checkpoint56c_post
1021    o OBCS as control variables
1022      - update ctrl_ad_diff.list, obcs_ad_diff.list
1023      - remove balance of obcs controls from default
1024      - fix index bug nobcs in ctrl_init
1025      - fix dummy fields filen in ctrl_pack
1026      - add dummy weights for obcs
1027    o lsopt: comment out fort.94 output
1028    o optim:
1029      - remove unnecessary header files
1030      - adjusted namelists
1031      - add xerbla.F to Makefile
1032    o exf:
1033      - multiple modifications of exf_check_range
1034      - unit change in exf_init_runoff from [m/year] to [m/s]
1035    o mdsio:
1036      - i/o-vector change debugLevel from debLevA to debLevB
1037    
1038    checkpoint56b_post
1039    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1040      is called from DO_THE_MODEL_IO
1041      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1042      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1043      - clean up PTRACERS_WRITE_TIMEAVE a little
1044    o add another verification experiment that tests both the cfc-pkg and
1045      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1046      reactive tendencies treated inline with regular timestepping
1047    o testreport previously did a lousy job of comparing small numbers, so
1048      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1049      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1050      testreport.
1051    o ptracers_monitor: bug fix for MPI
1052    
1053    checkpoint56a_post
1054    o GCHEM: finish reorganizating the package
1055      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1056        (introduces another 3D-array for each passive tracer, but only if
1057        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1058        gchemTendency is not needed because the timestep is done separately)
1059      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1060      - GCHEM is now---more or less cleanly---separate from PTRACERS
1061      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1062        so clear to me how that should be done in a general way.
1063    o CFC: improve formatting of output in CFC_ATMOS
1064    o PTRACERS:
1065      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1066        that ALL experiments with ptracers enable can be checked. This makes
1067        GCHEM_MONITOR obsolete.
1068      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1069        monitorFreq
1070      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1071    o add PTRACERS (PTR0[1-5]) to testreport output
1072    o exf_check_range:
1073      * default changed to .TRUE.
1074      * will check values for niter0 if debLevA, every timestep if debLevB
1075      * STOP in exf_check_range if 'out of range'
1076      * range chosen generous to allow for potential extema
1077      TBD: a version with stricter range
1078           permitted range would be runtime parameters
1079    o GMredi:
1080      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1081      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1082      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1083    o GCHEM:
1084      - move call to GCHEM_FORCING_SEP, so that it is now called before
1085        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1086      - introduced a useGCHEM runtime flag and applied it everywhere.
1087      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1088        this flag is now only visible within GCHEM-pkg routines.
1089      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1090        be replaced by a 3D array that is computed before thermodynamics; for
1091        this, the tracer ID iTracer had to be included into the parameter list
1092        of ptracers_forcing
1093      - set up forward_step to call gchem_forcing, that will replace
1094        gchem_forcing_int in ptracers_forcing
1095      - cleaning up
1096    o small cleaning of exch2: remove files that are also in eesupp/src
1097    
1098    checkpoint56
1099    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1100    o mnc: cleanup "full" files--fixes out-of-memory problem
1101    o ECCO-GODAE
1102      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1103      * fully merged and updated from SIO code
1104        windstress sign change affects
1105        - exf_inscal_[u/v]stress
1106        - sign of xx_tau[u/v] adjustments
1107        - signs in cost_scat
1108      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1109      * natl_box_adjoint updated and compressed
1110      * 2-level checkpoint switch added
1111        (tested in EXP. 1 of natl_box_adjoint)
1112      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1113    o SVD
1114      * first complete, non-hacked version for SVD calculations
1115      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1116        performed via direct access files admtlm_vector.it????
1117        (via ctrl_[un]pack)
1118      * optimcycle is used for ARPACK iteration counter
1119        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1120      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1121        and add linear transforms where necessary
1122      * controls are initial/final SST, SSS (can be extended; need to check
1123        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1124    o mdsio: filename info to both stderr, stdout
1125    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1126      from sign change
1127    
1128    checkpoint55j_post
1129    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1130      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1131    o add consistent build directories and .cvsignore files to verification
1132    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1133    o make all subroutines 30 or less characters in length for certain older
1134      compilers to work (a thorough search only turns up two routines in
1135      pkg/ptracers)
1136    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1137      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1138    
1139    checkpoint55i_post
1140    o change arrays for total vertical diffusivity (2.D if explicit,
1141      3.D if implicit) ; each ptracer uses its own background value.
1142    o added mnc/NetCDF output capability to ocn_compon_interf
1143      - added bits to verification/cpl_aim+ocn so that it can run on
1144        ITRDA and other clusters without the mpirun "-wd" option
1145    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1146      configuration
1147    o give MNC the ability to create additional files rather than
1148      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1149      - the default is just less than 2GB which is a practical limit
1150        on many systems
1151    o Compute the non-local term using either KPP vertical diffusivity (=default)
1152       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1153    
1154    checkpoint55h_post
1155    o add verification test "vermix"
1156    o remove all the *_ioinc flags and replace with the single global
1157      outputTypesInclusive flag
1158    o allow to set a vertical profile of vertical diffusivity for T & S
1159    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1160    o useMNC moved from data.mnc to data.pkg
1161    
1162    checkpoint55g_post
1163    o Renaming carbon AD experiments to comply with testreport conventions
1164    o Updating adjoint of Held-Suarez hs94.1x64x5
1165    o Fixing directives for non-ECCO forward_step, after ECCO directives
1166      have been fixed to avoid recomp. of do_oceanic_phys
1167      Works well for global_ocean.90x40x15,
1168      but recomp. issue remains for carbon
1169    o Updating adjoint output for natl_box_adjoint after
1170      pkg/ecco has been modified (see taga c55d_post)
1171    
1172    checkpoint55f_post
1173    o rename to timeave_init_fixed
1174    
1175    checkpoint55e_post
1176    o some delicate re-shuffle of store directives to avoid one
1177      extra call of do_oceanic_physics
1178      affects ecco_the_main_loop.F, do_oceanic_physics.F
1179      checkpoint_lev1_directives.h
1180    o NB: this may break global_ocean adjoint temporarily,
1181      but it is clear how to fix it. Will do later, need this now.
1182    
1183    checkpoint55d_post
1184    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1185    o ecco_cost_weights is modified to 1x1 runs
1186    o modifs to allow observations to be read in as
1187      single file or yearly files
1188    o enable to read exf forcing fields as either
1189      single file or yearly files (flag useExfYearlyFields)
1190    checkpoint55d_pre
1191    
1192    o switch between 2-level and 3-level checkpointing
1193    o add ability of MNC to write local and "partial" (eg. 2D slices where
1194      the full 3D field is never actually stored) arrays to NetCDF files
1195      with the correct (that is, the complete multi-dimensional) set of
1196      array indicies
1197      - used in mom_vecinv() to write the diagFreq output
1198      - tested (demonstrated) in verification/aim.5l_cs
1199    o further mnc-ification
1200      - add verification/lab_sea to the list with mnc setups
1201      - fix undefined mnc v-names in cd_code
1202      - add kpp to mnc output (both snapshot and timeave)
1203    o non-hydrostatic code
1204      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1205        in calc_gw.F
1206      - defaults to viscAh
1207      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1208        friction or Leith) in non-hydrostatic mode, as long as there is
1209        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1210    o pkg/cost
1211      extend simple cost functions to treat time mean quantities
1212      (T,U,V) via cost_accumulate_state from cost_tile
1213    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1214        be 2 times larger than the minimum size the advection scheme requires.
1215        now get a perfect conservation of salt in advect_cs test-exp (updated)
1216    o GGL90 (Gaspar's TKE mixed layer)
1217      - add horizontal diffusion of TKE, requires exchanges in
1218        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1219        default. In OPA there is no horizontal diffusion of TKE but the
1220        mixing coefficients are computed from a horizontal average of TKE of
1221        6 points or so. I think that diffusion has a little more physical
1222        justification.
1223      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1224        was in vain)
1225      - mask tke-variable in ggl90_init
1226    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1227    o fix biharmonic diffusion on CS-grid.
1228    o more obcs stuff
1229      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1230        for reading boundary values. This routine is called from
1231        obcs_prescribe_read
1232      - updated obcs_check
1233      - changed sponge layer relaxation parameter units for days to seconds
1234      - turned off sponge layer by default
1235      - changed argument list of OBCS_CALC to myTime+deltaTclock
1236      - fixed about 35 bugs in obcs_external_fields_load
1237    
1238    checkpoint55c_post
1239    o obcs stuff
1240      - new runtime flags useOBCSprescribe, useOBCSbalance
1241      - re-arranged obcs_calc
1242      - moved exf_getobcs to obcs_prescibe_read
1243        obcs_prescibe_read is called after ORLANSKI stuff
1244        and independent of it (executable can contain all).
1245      - updated obcs_check
1246      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1247        These may be necessary only if tangential velocities are
1248        prescribed at OB, not sure, needs testing.
1249    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1250      which simplifies the calls and passes the ifc check-bounds test
1251    
1252    checkpoint55b_post
1253    o add a 2D scalar, Z location, exchange_2 routine.
1254    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1255      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1256      affects advect_cs results (for the wrong reason): update output.txt
1257    o use a more standard discretization for biharmonic viscosity ;
1258     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1259      affects results of dome set-up: update output.txt
1260    o fix gad_advection.F (CubedSphere part), back to version 1.23
1261    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1262    
1263    checkpoint55a_post
1264    o merged code to
1265      * prescribe/read time-dependent open boundaries
1266        (works in conjunction with exf, cal)
1267      * sponge layer code for open boundaries
1268      * each boundary N/S/E/W now has its own CPP option
1269        (healthy for the adjoint)
1270    
1271    checkpoint55
1272    o up-to-date adjoint of previous breaks
1273      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1274      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1275      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1276      - carbon: * remove tr1-related adjoint verification
1277                * add ptracer as control variable
1278    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1279      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1280    
1281    checkpoint54f_post
1282    o in verification/carbin/ remove experiment related to
1283      ALLOW_PASSIVE_TRACER (array tr1 etc)
1284      code_ad/ input_ad/ results_ad
1285    
1286    o add two new packages
1287      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1288        + subject to optimization (memory)
1289      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1290        + subject to reordering (many GOTOs in the original code)
1291        + so far opps is called for every (i,j) point, and then operates in
1292          the vertical; one may want to reorder the scheme in order operate in
1293          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1294          fields)
1295    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1296      - all verification tests compile and run with linux_ia32_g77
1297      - defaults are compatible with current input files--nothing
1298        should change if you were not previously using MNC
1299      - MNC output has been added in numerous places (eg. timeave)
1300        but there are still a few writes not yet do-able with MNC
1301        (this is in progress)
1302      - flags now allow for either/or/both use of MDSIO and MNC and
1303        documentation will soon follow
1304      - numerous small formatting cleanups for ProTeX
1305    o add version info (via BUILD_INFO.h) to MNC and stdout
1306    
1307    checkpoint54e_post
1308    o add two new packages
1309      - pp81 (Packanowski and Philander, 1981), Richardson number and
1310        stratification dependent mixing
1311      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1312      - these scheme operate in a similar manner as KPP (without ghat, of
1313        course), however there is only one diffusivity that is used for both
1314        temperature and salinity (and passive tracers)ç
1315    o add offline package
1316    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1317      provided by Stephanie Dutkiewicz
1318    o genmake2: add ability to search for C compilers and cleanup test output
1319      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1320    
1321    checkpoint54d_post
1322    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1323    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1324      leading to additional shift by 5 days each year of integration
1325       (i.e. leading to considerable offset over the years)
1326    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1327    o start with no AB and no initial filtering (staggerTimeStep):
1328      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1329    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1330      (external loading & cpl import/export stay in forward_step.F)
1331    o update coupling interface to work with new staggerTimeStep
1332    o change MDSIO ptracers_pickup.
1333    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1334    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1335    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1336    
1337    checkpoint54c_post
1338    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1339      this affects (truncation error) output.txt of test-exp:
1340       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1341    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1342    o change Qnet to always be the net heat flux, (+upward).
1343      affects (truncation error) output of natl_box exp.: updated
1344    o define the max number of passive tracers in PTRACERS_SIZE.h
1345    o start to test mnc routinely in exp0
1346    o add sea-ice loading (sIceLoad) as a new forcing field.
1347    
1348    checkpoint54b_post
1349    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1350       impressive on Altix and Opteron systems)
1351    o diagnostics can now write NetCDF files through the mnc package
1352    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1353    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1354    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1355      affects (truncation error) output of lab_sea & natl_box exp.: updated
1356    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1357    
1358    checkpoint54a_post
1359    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1360    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1361    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1362    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1363      + internal_wave (shift in writing cg2d_ini_res)
1364    checkpoint54a_pre
1365    
1366    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1367      - modified verification/lab_sea and natl_box_adjoint accordingly
1368    
1369    checkpoint54
1370    checkpoint53g_post
1371    o prepare splitting of thermodynamics: store convect.counter in common block
1372    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1373      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1374    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1375    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1376    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1377    o restore adjointability
1378    
1379    checkpoint53f_post
1380    o modifications that affect AIM experiment results (update output.txt):
1381      - no advection of S at top interface Nr (pkg/generic_advdiff)
1382      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1383    o AIM pkg:
1384      - include stability function into surf.Flux derivative relative to Tsurf
1385      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1386    
1387    checkpoint53e_post
1388    o merged cylindrical coord configuration
1389    o added rotating_tank experiment
1390    checkpoint53e_pre
1391    
1392    checkpoint53d_post
1393    o faulks upgraded: re-generate output.txt that have changed:
1394       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1395    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1396    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1397    o added Sadourny discretization of Coriolis
1398      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1399      - re-enabled use of omega3 (useAbsVorticity)
1400    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1401      vector-invariant equations
1402      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1403    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1404      hopefully without new bugs
1405      - still to do: biharmonic friction for non-hydrostatic w
1406    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1407    o regenerated output for global_ocean_ebm (using -ieee)
1408    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1409      of mom_common/
1410      - simple re-arrangement of instructions within computing loop
1411    checkpoint53d_pre
1412    
1413    checkpoint53c_post
1414    o new version of coupler for AIM+thSIce and Ocean models
1415     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1416     - land: change Evaporation of snow
1417     - aim with thSIce: fix bug in snow-precip.
1418    o changes to calc_gw.F
1419     - bug fix for w^2 term near the bottom boundary
1420     - (hopefully) improve the lateral slip boundary condtions for use with
1421        partial/looped cells
1422      - because the bug fix changes two verification experiments anyway (exp5
1423        and plume on slope), change the lateral boundary condition from half slip
1424        to the value of no_slip_sides
1425    o ebm package wasnt quite up to the parallel task. Fixed that.
1426    o Adjoint of EBM package + verification
1427      * TLM OK
1428      * ADM not sufficient accuracy yet (needs further testing)
1429    
1430    checkpoint53b_post
1431    o Commiting new energy balance model to repository
1432      * package is pkg/ebm
1433      * verif. is verification/global_ocean_ebm
1434      * references are in ebm_driver.F
1435    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1436    C        Global thermohaline circulation. Part I:
1437    C        Sensitivity to atmospheric moisture transport.
1438    C        J. Climate 12(1), 71-82
1439    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1440    C        Global thermohaline circulation. Part II:
1441    C        Sensitivity with interactive transport.
1442    C        J. Climate 12(1), 83-91
1443    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1444    C        Destabilization of the thermohaline circulation
1445    C        by atmospheric eddy transports.
1446    C        J. Climate 7(12), 1870-1882
1447    o Will need long integration testing.
1448    checkpoint53b_pre
1449    
1450    o created pkg/mom_common in preparation for variable viscosity code
1451    o renamed and split ini_mnc_io
1452    o pkg/land: only liquid water can diffuse or run-off
1453    o AIM using land: soil wetness availability account for snow
1454    o added printMapIncludesZeros to EEPARMS namelist
1455    
1456    checkpoint53a_post
1457    o restore TAMC compatiility for exf_constants.h
1458      (no usage of _d in .h)
1459    o Additional storing in KPP in an attempt to fix
1460      TAMC problem with adjoint of KPP code.
1461      (no success...)
1462      Identical code works fine with TAF.
1463    o Fixed verification/natl_box_adjoint experiments.
1464      Initial conditions for Experiments 4 and 5 are now
1465      set to "SEAICE_initialHEFF=0", which is more reasonable,
1466      and hence gives results closer to that of Experiment 2.
1467      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1468    
1469    checkpoint53
1470    o stable checkpoint with up to date adjoint
1471      TLM tests only run for 1st grdchk at the moment. Its unclear if
1472      this is a code problem or a problem with resetting code for g_
1473      variables that is being autogenerated wrong.
1474      Otherwise:
1475       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1476       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1477         are both still in chaos following their security messes.
1478    
1479    checkpoint52n_post
1480    o various build (mostly genmake2) changes including:
1481      - ability to build/run more easily within Cygwin and MacOS X
1482      - more complicated Makefiles with a stronger dependence on Gnu Make
1483    o pkg/seaice modifications
1484      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1485        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1486        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1487      - changed proxy for geostrophic velocity and updated
1488        verification/lab_sea/results/* accordingly
1489      - removed ADI dynamic solver from pkg/seaice
1490      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1491        they caused a segmentation fault under certain circumstances
1492      - removed unused field WATR
1493    o bug fix in exf-package:
1494      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1495         now reflect that.
1496    o small fixes in the cal-package:
1497      - set reference date to first of January for the 'model'-calendar
1498      - failing of cal_CheckDate in cal_FullDate now actually results in a
1499        warning
1500    o small modifications in exf-package to increase flexibility:
1501      - change climtempfreeze from a constant to a runtime parameter that
1502        is specified in data.exf_clim (default = -1.9)
1503      - introduce runtime parameter windstressmax (default = 2.0) that is
1504        specified in data.exf
1505    o fix in pkg/thsice:
1506      - update Evap (Tsf changes) to be consistent with Latent heat flux
1507      - maintain snow precipitation unchanged (even if Tsf >=0).
1508     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1509    
1510    checkpoint52m_post
1511    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1512      this does not change any of the results, because myIter=0 in swfrac always
1513      lead to jwtype=2 (the default anyway), but the call makes little sense
1514      as a default
1515    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1516    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1517      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1518    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1519    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1520    o extending useSingleCpuIO option to work with new exch2 I/O format
1521      - old-style, missing-tile I/O is still accessible by defining CPP
1522        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1523    o monitor package can write to NetCDF files and/or STDOUT
1524    o fix re-definition bug in MNC_GRID_INIT_ALL()
1525    o doc/api_reference added
1526      - a framework for building an API Reference Manual using all
1527        the "protex" comments embedded in the code
1528      - see pkg/generic_advdiff, pkg/mnc for examples
1529    o MNC:
1530      - make myThid the last argument for all subroutines
1531      - new default for the grid files: NO halos
1532      - add useMNC and other run-time flags
1533      - separate per-file-group handling of the unlimited dimension
1534      - early initialization of MNC w/ flags read at the eeboot stage
1535        and lookup tables set in initialize_fixed
1536      - write all MNC output to a freshly-created directory
1537    o thermodynamics sea-ice (thsice) is now tested with testreport.
1538    o test exp. advect_cs: use the standard cs32 grid ; update output.
1539    o Added functionality to grdchk:
1540      pick global i,j,k position (or nearest wet) where to perform check.
1541    
1542    checkpoint52l_post
1543    o new land formulation:
1544      a) use ground enthalpy as prognostic variable to ensure exact
1545         energy conservation.
1546      b) account for water temperature and for latent heat of freezing
1547         in all processes (rain, run-off, ground storage)
1548      c) compute surface and ground temperature implicitly.
1549    o aim_v23 modification for new land model:
1550      a) Treat separately land / ocean / sea-ice surface fluxes
1551         to allow implicit computation of land & sea-ice surface temp.
1552      b) add snow precipitation.
1553    checkpoint52l_pre
1554    
1555    o fix problem (when 1 tile is empty) in min/max monitor.
1556    o fix bug in timeAve (u,vZetatave in common block)
1557    o no restoring terms under ice for pkg/seaice
1558    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1559    o bug fix for pkg/seaice pickups
1560    o change MNC call locations and add coordinate attributes
1561    o mask vorticity at the corner ; affects global_ocean.cs output
1562    o fix ini_curvilinear_grid ; test CS experiments with mpi
1563    o aim.5l_cs: modify sea-ice fraction input file ; update output
1564    o exf: Adding simple range check routine for exf fields after read
1565    
1566    checkpoint52k_post
1567    o removed top-level directory "diags"
1568      - we migrated these functions to pkg/timeave a long time ago
1569    o fixed bug introduced in pkg/monitor
1570    o accuracy ctrlprec = 32 insuffient for gradient checks using
1571      averaged fields (I/O via cost_averages)
1572      -> use ctrl.h in active_file*.F to control I/O precision.
1573    o paramter list of CALL ADTHE_MAIN_LOOP
1574    o added initial do_the_model_io to ecco
1575    o set all ...Freq to zero after cost_final
1576      taveFreq, dumpFreq, pChkptFreq
1577    o MAIN and ECCO differentiability restored
1578    
1579    checkpoint52j_post
1580    o fix nchklev in tamc.h for global_ocean...
1581    o Bringing flow and store directives up-to-date
1582    o Really weird thing!
1583      call do_the_model_io from the_main_loop with parameters
1584      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1585      TAF places a faulty re-call of initialise_varia
1586      after cost_final call which should not be there!
1587    checkpoint52j_pre
1588    
1589    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1590      error messages
1591    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1592    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1593      debug output
1594    o modfied mdsio_writefield.F to handle non-global files under exch2
1595    o update AIM Cubed-Sphere exp (aim.5l_cs):
1596      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1597    o update AIM Equatorial Channel exp:
1598      use standard aim_v23 pkg and change the SST fields to be more realistic.
1599    o globalFile now works with exch2
1600    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1601      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1602    o limit timeave output for hi-res integrations
1603    
1604    checkpoint52i_post
1605    o removed CPP_EEOPTIONS.h from verification/*/code
1606    o updated the tiling for global_ocean_pressure
1607    checkpoint52i_pre
1608    
1609    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1610      the old pkg/aim).
1611    
1612    checkpoint52h_pre
1613    o shortened offending lines in exch2_send_rx?.template
1614    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1615    o genmake2: add build & execute test for NetCDF code
1616    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1617      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1618    o added useSingleCPUIO flag to monitor.F and mon_out.F
1619    o added temporary hack for sea-ice dynamics on the cube:
1620      metric terms are ignored and it is assumed that
1621      there is no sea-ice on cube faces 1, 2, 4, and 5.
1622    
1623    checkpoint52f_post
1624    o added exch2 cube routines to pkg/exch2
1625    o modified hs94.cs-32x32x5 to use it
1626    o added new grid files to hs94.cs-32x32x5
1627    checkpoint52f_pre
1628    
1629    checkpoint52e_post
1630    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1631      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1632    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1633      to work with implicit vertical advection and AB ;
1634    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1635    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1636     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1637    checkpoint52e_pre
1638    
1639    o fix bug in impldiff when Nr=1 or Nr=2.
1640    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1641    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1642    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1643      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1644    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1645    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1646    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1647    
1648    checkpoint52d_post
1649    o re-tiled many expts to allow comparison in multi-processor mode
1650      - updated output accordingly
1651      - changed hs94.128x64x5 to use intial T from file rather than use the
1652        random number generator
1653    o add infrastructure in model routines for fizhi and gridalt packages
1654    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1655    o changes to permit hi-res, cubed-sphere, configuration
1656      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1657      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1658      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1659        of surface winds for the cube
1660      (A verification experiment, based on global_ocean.cs32x15, but with
1661       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1662       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1663       complete with example surface forcing files and matlab scripts to look
1664       at the output and compare it with that of global_ocean.cs32x15.)
1665    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1666       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1667       to conform to the common rule.
1668    o check-in the first version of the coupler + interfaces for multi-components
1669       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1670       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1671       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1672       - ocean and atmos. share the same horizontal grid (no interpolation).
1673       - exchanges between component and coupler is done in forward_step
1674    o new verification experiment, cpl_aim+ocn:
1675       coupled ocean - AIM atmosphere on cs32 grid.
1676    
1677    checkpoint52d_pre
1678    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1679    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1680    
1681    checkpoint52c_post
1682    o Fixing OPTIONS files for use of exf:
1683      - ALLOW_ECCO not needed
1684      - ECCO_CPPOPTIONS.h should not be included from
1685        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1686        as has been the case in the past
1687      - All cal/exf related options are currently set in
1688        single header file. Should remain so until we
1689        agree on a consistent new policy.
1690    o Removed all CPP options for cal package.
1691      cal has no more CPP options.
1692    o modified STOREs in GAD_ADVECTION
1693    o corrected key comp. for passkey
1694    
1695    checkpoint52b_post
1696    o new version: "thsice" of thermodynamic sea-ice pkg:
1697     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1698     - modify fluxes but do not change theta directly;
1699     - light cleaning of bulk_force pkg (still needed with thsice).
1700     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1701       + output_thsice.txt to test thsice & bulk_force pkgs.
1702    o put back grid & coriolis monitor output.
1703    checkpoint52b_pre
1704    
1705    o call "do_the_model_io" at the beginning (=> dump initial state)
1706    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1707    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1708      (need info on NUMBER_OF_PTRACERS)
1709    o missing PTRACERS headers in some routines
1710    o default tamc.h in pkg/autodiff supposed to crash
1711      to ensure proper customization
1712    
1713    checkpoint52a_post
1714    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1715      - moved surfaceTendencyTice from pkg/seaice to main code
1716      - subroutine FREEZE_SURFACE now limits only surface temperature
1717        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1718        => new output.txt for global_ocean.cs32x15 & global_with_exf
1719      - keep the old version of FREEZE for backward compatibility;
1720        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1721      - corresponding modifs for TAF directives
1722    o added surface flux output variables to TIMEAVE_STATVARS
1723    o time-averaged output for pkg/ptracers
1724    o fix problem with ECCO-related divided adjoint
1725      snapshot file was missing some ad-variables,
1726      but no warning issued by TAF
1727    
1728    checkpoint52a_pre
1729    o some bug fixes for #undef REAL4_IS_SLOW
1730    
1731    checkpoint52 = ecco_c52_e35
1732    o after testing adjoints of checkpoint51u_post
1733    
1734    checkpoint51u_post
1735    o this is the post-merge tag of the ecco-branch
1736      (needs another clean checkout and re-testing)
1737    o various natl_box_adjoint configs and results
1738      but no input fields
1739    o obcs adjoint not yet merged!
1740    o adding ECCO global 1x1 and 2x2 degree configs
1741    o updated/extended some store directives for seaice
1742    o pkg/ecco now containes ecco-specific part of cost function
1743    o top level routines the_main_loop, forward_step
1744      supersede those in model/src/
1745      previous input data.cost now in data.ecco
1746      (new namelist ecco_cost_nml)
1747    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1748    
1749    checkpoint51t_post
1750    o this is the pre-merge tag of the ecco-branch
1751    
1752    checkpoint51s_post
1753    o cleanup: removed various obsolete #define-s
1754    o pkg/grdchk
1755      - renamed 'ph-grd 3' to 'grad-res'
1756      - merged from ecco-branch
1757        (remaining bug fixes for obcs gradient checks)
1758      - additional high-precision output for testreport
1759        (grep for 'precision_grdchk_result')
1760    
1761    checkpoint51r_post
1762    o cleaned up or removed CPP_OPTIONS.h files
1763    o updated results for some of the tests to reflect the new
1764      optfiles (-ieee: -O0 instead of -O3)
1765    
1766    checkpoint51q_post
1767    o cd_code:
1768      - moved cd_scheme.F -> cd_code_scheme.F
1769      - separate read_checkpoint from cd_code_ini_vars.F
1770      - separated cd_code part from write_checkpoint
1771      - updated AD_SOURCE, generated .flow
1772      - added CD_CODE_VARS.h to the_main_loop
1773      - Moving cd_code specific store dir.s to pkg/cd_code
1774    o ctrl package totally restructured
1775      - pack/unpack now optional and decoupled from
1776        xx_/adxx_ I/O
1777      - ctrl_pack/unpack cleaned
1778        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1779      - confined inclusion of AD_CONFIG.h to where necessary.
1780    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1781    
1782    checkpoint51p_post
1783    o create initial cd_code package
1784      - WARNING: the initialization of fields within packages
1785        is broken because INI_FIELDS (where READ_CHECKPOINT is
1786        called) is called *before* PACKAGES_INIT_VARIABLES.
1787        This seems to be backwards since
1788        1) its important to initially zero the entire field including
1789           the "halo" region
1790        2) zeroing needs to be done *before* reading pickup info
1791           and the pickup call might or might not happen in any
1792           particular run
1793      - this needs an overhaul for R2
1794    o cleanup verification/*/code/GMREDI_OPTIONS.h
1795    o cleanup testreport
1796    
1797    checkpoint51o_post
1798    o bringing AD-related verif's up to date with genmake2
1799      - carbon/
1800      - global_ocean.90x40x15/
1801      - hs.94.1x64x5/
1802      - (front_relax/ )
1803    o (more) consistent directory structure for AD-related verif.'s
1804    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1805    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1806    o bug fix in find_alpha.F for MDJWF:
1807      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1808        change rho -> rho-rhoConst
1809      - replace call find_rho to find_rhonum
1810    o initialisation of rFlx extended to full array (required by TAF)
1811      and shifted to thermodynamics
1812    o removed PTRACERS.h in ptracers routine
1813    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1814    o Correcting initialisations for fVerU, fVerV.
1815    o helping TAF to recognize dependency on kUp for
1816      fVerU, fVerV
1817    o Replacing delZ by delR in pkg/ctrl/
1818    checkpoint51o_pre
1819    
1820    o undid all of cp51 pending some cleanups and discussion
1821    o added the [#include "AD_CONFIG.h"] statement to all files that need
1822       it for adjoint/tl #defines
1823     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1824     o removed tools/genmake since it no longer works
1825    
1826    checkpoint51n_post
1827    o modifications to make FREEZE flux visible to pkg/kpp
1828      - moved surfaceTendencyTice from pkg/seaice to main code
1829      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1830      - subroutine FREEZE now limits only surface temperature
1831        (this means new output.txt for global_ocean.90x40x15,
1832         global_ocean.cs32x15, and global_with_exf)
1833    o added surface flux output variables to TIMEAVE_STATVARS
1834    
1835    checkpoint51n_pre
1836    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1837    o added [#include "AD_CONFIG.h"] to all files that use the following
1838      defines:
1839      - ALLOW_ADJOINT_RUN
1840      - ALLOW_TANGENTLINEAR_RUN
1841      - ALLOW_ECCO_OPTIMIZATION
1842    
1843    checkpoint51m_post
1844    o incorporating changes to get TAMC/TAF working in genmake2
1845      - added new TAMC/TAF targets to the Makefile
1846      - various cleanups related to package handling
1847      - these changes should have no impact on the forward model
1848    
1849    checkpoint51l_post
1850    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1851     - faster algorithm for cal_addtime.F
1852     - higher precision arithmetic, where needed
1853     - pkg/exf *startdate variables changed from calendar date to
1854       model integration time
1855    
1856    checkpoint51l_pre
1857    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1858    o enable to apply restoring on S & T only in a latitude band.
1859    o update output (external_forcing_surf modif. change truncation errors)
1860       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1861    
1862    checkpoint51k_post
1863    o change default to: useNHMTerms=.FALSE.
1864     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1865       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1866     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1867        exp1, ideal_2D_oce
1868     - change data file of oceanic exp (leave the results unchanged for now)
1869       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1870    o set gravitySign automatically according to the vertical coordinate used
1871      (and change sign: back to "logical" value: +1 when R increases downward)
1872    o added an include barrier to the default CPP_OPTIONS.h and
1873      removed the #include "PACKAGES_CONFIG.h" from it
1874    o fix a bug in mom_fluxform (from chk51j_post)
1875    
1876    checkpoint51j_post
1877    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1878    o adjusted some flow directives (dynamics, thermodynamics)
1879    o added cubed-sphere case to test cost function
1880    o heckpoint_lev?_directives.h now include
1881      pkg-specific directives, whenever those are enabled.
1882    o Moving pkg-specific flow directives to corresponding pkg
1883      Moving pkg-specific differentiation list to corresponding pkg
1884      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1885      ---> conventions are
1886           - pkg_ad.flow
1887           - pkg_ad_diff.list
1888           - pkg_ad_check_lev?_dir.h
1889    
1890    checkpoint51i_post
1891    o merge of the branch-genmake2
1892      - knowingly breaks the older genmake
1893      - automatic generation of all ALLOW_${PKG_NAME} defines
1894      - new testreport supersedes older testscript
1895    o large number of package inclusion and header cleanups
1896    checkpoint51i_pre
1897    
1898    o new output for adjoin of global ocean vector invariant
1899    o fix for checkpoint of thermodynamic seaice and bulk_force
1900    o Steph gchem various cleanups
1901    
1902    checkpoint 51h_pre
1903    o fixed some single quotes
1904    o modify gchem pkg to be more versatile
1905    o modifications to clean up dic pkg
1906    o add pkg/cfc
1907    
1908    checkpoint51g_post
1909    o provide links for ARPACK and ADM*TLM
1910    o start removing verification/vero/
1911    o update AD-related stuff
1912      (in particular some IF-statements in model/src/ routines)
1913    o adding to verification/global_ocean.90x40x15/ adjoint of
1914      vector invariant setup
1915    
1916    checkpoint51f_post
1917    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1918    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1919      of tracer Green's fucntions for ocean inversion project.
1920    
1921    checkpoint51f_pre
1922    o Added on-the-fly spatial interpolation capability
1923        "USE_EXF_INTERPOLATION" to pkg/exf.
1924      - This is a temporary Cartesian-grid hack until
1925        the super-duper ESMF coupler becomes available.
1926      - See verification/global_with_exf/README for usage example.
1927      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1928        flags and modified pkg/seaice accordingly.
1929    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1930        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1931        non-local transport term.
1932    
1933    checkpoint51e_post
1934    o pkg/mom_vecinv:
1935      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1936      - add time-ave diagnostic of vorticity advection.
1937    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1938    o atmospheric geopotential: - include water vapor effect;
1939                                - use p^kappa in p* scaling.
1940    o land pkg: read initial state from files.
1941    o AIM : add stratospheric drag in the upper level
1942    
1943    checkpoint51d_post
1944    o change function ILNBLNK (=> last non-blank char.) to return zero
1945      (instead of the string length) when the string. char is empty
1946    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1947    o modif's to restore TAMC compatibility
1948      - avoid "_d" constructs in PARAMETER declarations
1949      - avoid interrupting lines by comment lines
1950    o Use cluster local disks for purely local I/O
1951      vs. globally visible disks needed for ctrl stuff
1952      (merged from ecco-branch)
1953      - new active_file_loc... and mdsio_..._loc routines
1954      - affected packages: autodiff, ctrl, grdchk, mdsio
1955    
1956    checkpoint51c_post
1957    o introducing integer flag debugLevel
1958      - debLevZero: suppress all output
1959      - debLevA: standard
1960      - debLevB: equivalent to current debugMode=.TRUE.
1961    o introducing pathname variable mdsioLocalDir for mdsio
1962      that can be specified at runtime
1963      (relevant for cluster I/O to local disk)
1964    `
1965    >>>checkpoint51b_post
1966    adjoint of ptracers
1967    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1968    o extended state in checkpoint_lev?, etc.
1969    o alternative ctrl/cost with tr1 or ptracer
1970    o new comlev1_bibj_ptracers
1971    o new ptracers.flow
1972    o made ptracers_forcing same as external_forcing_s
1973    o added verification for adjoint with ptracers
1974      - adm. grdchk fail so far
1975      - tlm. grdchk OK
1976      - checked tapelev/comlev recomputations: OK
1977    <<<checkpoint51b_pre
1978    
1979    checkpoint51a_post
1980    o added code for biogeochemistry package
1981      - new pkgs: dic, gchem
1982      - new subroutine in ptracers
1983    o modify code for biogeo packages
1984      - in model/src and pkg/ptracers
1985    
1986    checkpoint51
1987    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1988      - autodiff, ctrl, exf, grdchk, seaice
1989      kept separate packages
1990      - cost, ecco, obcs
1991    o updating verification/internal_wave, verification/lab_sea
1992      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1993    
1994    checkpoint50i_post
1995    o Preparing next differentiable checkpoint and sync
1996      of MAIN vs. ecco-branch
1997      - 1st step: this one is differentiable
1998      - 2nd step: next(! not this) checkpoint will have updated packages
1999                  from ecco-branch)
2000    
2001    checkpoint50h_post
2002    o new package "land": provide surface BC for AIM.
2003    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2004    o AIM: use true log-P extrapolation for near surface temp (= as in
2005        F.Molteni paper) ; update aim.5l_cs output.
2006    o New variable in PARM03 for more flexible pickups
2007    o somewhat cleaned package initialisation sequence for
2008      ctrl/ cost/ ecco/ in packages_... routines
2009    
2010    checkpoint50g_post
2011    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2012      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2013      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2014        made the default because of faster convergence than ADI
2015    
2016    checkpoint50f_post
2017    o exf totally restructured
2018      - replaced all exf_set_ routines by one generic exf_set_gen.F
2019        and made sure it's still differentiable
2020      - split exf_getffields.F into new exf_bulkformulae.F
2021      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2022      - updated adjoint/makefile and relevant verif. accordingly
2023    
2024    checkpoint50f_pre
2025     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2026          + change Evap over land. (update aim.5l_cs output)
2027     o added missing .cvsignores and made uniform across expts
2028     o changed configuration of tidal_basin_2d expt
2029     o added pkg/debug functions for tracing code in fatal crashes
2030     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2031     o new fn in pkg/monitor to stop model if solution grows too big
2032     o removed lots of single quotes from comments
2033    
2034    checkpoint50e_post
2035    o make KPP work with PTRACERS
2036     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2037       nearly a copy of kpp_transport_s
2038     - there is no analogue to SurfaceTendencyS, so I have to use
2039       gPtr(of the surface layer) instead
2040    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2041    checkpoint50e_pre
2042    
2043    checkpoint50d_post
2044    o change kpp output from multiple-record state files to single-record state
2045      files analogous to write_state.F
2046    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2047      analogous to the cg2d-related output.
2048    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2049      so that writing to internal file fn (with length 512) fails.
2050    checkpoint50d_pre
2051    
2052    checkpoint50c_post
2053    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2054    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2055    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2056    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2057    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2058    
2059    checkpoint50c_pre
2060    Merging from release1_p13:
2061    o bug fix for pkg/seaice dynamic solver
2062    o Added SEAICE_initialHEFF to pkg/seaice
2063    
2064    checkpoint50b_post
2065    o store u*,v* in gU,V instead of in guNm1,gvNm1
2066    o in order to put the momForcing out of the Adams-Bashforth:
2067      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2068      to timestep.F
2069    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2070    o re-generate output for highly sensitive test-exp:
2071       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2072    
2073    checkpoint50b_pre
2074    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2075    o corrected CPP option mismatch in exf_Bulk... functions for case
2076      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2077    
2078    checkpoint50a_post
2079    o Bug fix for merging between c50 and KPP.
2080      ikey was passed from thermodynamics to kpp_calc via
2081      common block rather than being recomputed in kpp_calc,
2082      in contradiction with new key itdkey.
2083      New key ikppkey created, and tamc.h headers updated.
2084    
2085    checkpoint50
2086    - 2nd step of merge with ecco-branch:
2087      merge changes in ecco-branch back into main trunk
2088    - bug fix in find_alpha
2089    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2090    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2091    - merged some sliced AD support routines
2092    
2093    checkpoint49
2094    merged from ecco-branch:
2095    o exf:
2096      - Enable initialisation of forcing fields to constant
2097        (runtime) values.
2098      - in exf_getffields.F
2099        Reduce i-/j-loop to interior domain, discarding overlaps.
2100        That also fixes wrong TAF-key computations for key_1, key_2
2101        with bulf formulae.
2102      - exf_init.F modify #ifdef for exf_init_evap
2103      - exf_getffieldrec.F, ctrl_getrec.F
2104        The following INT-usages are not safe:
2105          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2106          fldcount = int(fldsecs/fldperiod) + 1
2107        and were modified.
2108    o autodiff: checkpoint_lev...
2109      - updated storing for bulk formulae (some arrays were missing)
2110      - added state for seaice package
2111      - synchronized with main branch
2112    o DIVA:
2113      Modif.s in
2114      - the_main_loop.F
2115      - the_model_main.F
2116      and added cost_final_restore.F cost_final_store.F
2117      o With these changes, it is possible to fully separate
2118        the first forward run to compute the cost function (mdthe_main_loop)
2119        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2120        into separate model executions.
2121        This enables better tuning of DIVA to given queue sizes.
2122      o Loss of cost function value in consecutive DIVA runs is
2123        fixed by storing to 'costfinal' file.
2124      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2125        beginning/end of adjoint integration is accounted for.
2126      The current changes apply to TAF-1.4.26.
2127      TAF has one remaining bug, requiring one manual change
2128      (see MITgcm manual).
2129    o cal: synchronized between MAIN and ecco-branch
2130    
2131    checkpoint48i_post
2132    o Changes to restore differentiability of code w.r.t. previous tag
2133      (mostly adding new routines to make list and replacing
2134      pressure by totPhiHyd).
2135    o Updated and merged grdchk package
2136      - has both ADM and TLM checks
2137      - works for single- and multi-proc.
2138      - output cleaned
2139      - worked successfully for parallel DIVA
2140    o genmake:
2141      - Adding -platform=SP4
2142      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2143    o Modif. for DIVA:
2144      ctrl_unpack should not be called in intermediate DIVA interval.
2145      (similar thing would apply for active files such as
2146      tbar, sbar, psbar, which should not be reinitialised;
2147      only relevant for ecco-branch)
2148    
2149    checkpoint48h_post
2150    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2151    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2152    o Added SEAICE_initialHEFF to pkg/seaice
2153    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2154    
2155    checkpoint48g_post
2156    --- EOS:
2157    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2158      store total Potential in totPhyHyd for diagnostics & EOS.
2159    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2160    --- Pressure/geopotential gradient:
2161    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2162    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2163      ( changes results of global_ocean_pressure )
2164    o NLFS + z-coord.: add eta*Rho' contribution.
2165    o accurate phiHyd when using interface-W at the middle between 2 centers
2166     ( changes results of ideal_2D_oce )
2167    o includes r* 2nd term in potential gradient.
2168    
2169    checkpoint48f_post
2170    Merging from release1_p12:
2171    o Modifications for using pkg/exf with pkg/seaice
2172      - improved description of the various forcing configurations
2173      - added basic radiation bulk formulae to pkg/exf
2174      - units/sign fix for evap computation in exf_getffields.F
2175      - updated verification/global_with_exf/results/output.txt
2176    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2177      (SBO) core products, including oceanic mass, center-of-mass,
2178      angular, and bottom pressure (see pkg/sbo/README.sbo).
2179    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2180      to avoid negative values in shallow regions.
2181      - updated verification/natl_box/results/output.txt
2182      - updated verification/lab_sea/results/output.txt
2183    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2184    o Added useSingleCpuIO option (see PARAMS.h).
2185    o Updated useSingleCpuIO option in mdsio_writefield.F to
2186      work with multi-field files, e.g., for single-file pickup.
2187    o pkg/seaice:
2188      - bug fix in growth.F: QNET for no shortwave case
2189      - added HeffFile for specifying initial sea-ice thickness
2190      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2191    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2192      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2193    o pkg/seaice:
2194      - adjoint-friendly modifications
2195      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2196    
2197    checkpoint48e_post
2198    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2199    o dynamics: change definition of computational domain & adapt mom_fluxform
2200      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2201    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2202        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2203        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2204        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2205        inverted_barometer solid-body.cs-32x32x1
2206      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2207    
2208    checkpoint48d_post
2209    o in preparation for r*:
2210     a) use pre-computed gradient of hydrostatic potential:
2211        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2212     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2213        => affects results of glob_oce_pressure (different truncation error)  
2214      update output.txt of ideal_2D_oce & global_ocean_pressure
2215    
2216    checkpoint48d_pre
2217    o in preparation for r*:
2218      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2219      pass the 2 comp. of the grad. as arguments to momentum S/R.
2220      but for the moment, only used if it does not change the results.
2221    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2222    
2223    checkpoint48c_post
2224    Modifications in treatment of initial flux forcing controls
2225    to avoid extra storing of flux fields.
2226    
2227    checkpoint48c_pre
2228    o Added tidal_basin_2d experiment (currently 1D!)
2229    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2230    
2231    checkpoint48b_post
2232    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2233     (modification to pressure gradient not yet implemented)
2234    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2235      (for U & V) that are used for vertical advection of momentum.
2236    
2237    checkpoint48a_post
2238    o In preparation for r*, use temp. array to compute vertical transport
2239       in flux-form momentum pkg. => change results of few test-exp.
2240      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2241                        lab_sea, natl_box & plume_on_slope
2242    
2243    checkpoint48
2244    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2245    
2246    checkpoint47j_post
2247    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2248    o moved adexch from forward_step to addummy_in_stepping
2249    o added exch in ctrl_map_...
2250    o aveFreq.=0. at end of cost_final to avoid overwrite in
2251      reverse checkpointing loop
2252    o Yet more changes in gmredi:
2253      * adgmredi_calc_tensor
2254        avoiding all recomputation of gmredi_slope_limit
2255      * adgmredi_x/y/rtransport
2256        added flag for excessive storing to avoid recomp. of
2257        u/v/rtans, dTdx/y/z
2258        -> this is not really necessary and very memory-consuming
2259      * adgmredi_slope_psi:
2260        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2261      * gmredi_slope_limit
2262        re-activated full calculation of taperfct for case 'ac02'
2263    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2264    
2265    checkpoint47i_post
2266    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2267    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2268      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2269    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2270    o gmredi: fix few bugs.
2271    
2272    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2273    This will be a good checkpoint to plug into the ecco-branch.
2274    o few modif.'s to get latest version adjointed
2275      (mainly kick out code in ini_linear_phisurf)
2276    o modif's to run adjoint with exactConserv
2277    o case GM_BOLUS_ADVEC should be cleaned
2278      S/R gmredi_slope_psi should be cleaned
2279    o verification/carbon now has exactConserv=.TRUE.
2280    
2281    checkpoint47g_post
2282    o time-average AIM output: becomes independent from statvars time-average
2283      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2284    o After TAF bug fix:
2285      Tested adjoint of gmredi package.
2286      Tests were done with checkpoint47 rather than with latest
2287      checkpoint47f_post since the latter is broken for the adjoint
2288      verification/carbon/ contains both ADM and TLM gradient checks.
2289    Here they are, before they get changed/lost/stolen.
2290    Mostly modif.'s to fix numerical sensitivities.
2291    Gradient checks OK for
2292    - GM_taper_scheme:
2293      * clipping
2294      * ac02
2295      * linear
2296      * glw91
2297      * dm95
2298      * ldd97
2299    - GMREDI_OPTIONS:
2300      * GM_VISBECK_VARIABLE_K
2301      * GM_NON_UNITY_DIAGONAL
2302      * GM_EXTRA_DIAGONAL
2303      * GM_BOLUS_ADVEC
2304    in conjunction with data.gmredi parameters to be checked in
2305    in a few minutes under verification/carbon/code/
2306    
2307    checkpoint47f_post
2308    Merging from release1_p10:
2309    o modifications for using pkg/exf with pkg/seaice
2310      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2311        and SEAICE_EXTERNAL_FLUXES
2312      - pkg/exf CPP options EXF_READ_EVAP and
2313        EXF_NO_BULK_COMPUTATIONS
2314      - usage examples are Experiments 8 and 9 in
2315        verification/lab_sea/README
2316      - verification/lab_sea default experiment now uses
2317        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2318    
2319    checkpoint47e_post
2320    o created a tag prior to creating a branch
2321    
2322    checkpoint47d_post
2323    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2324      at the bottom boundary had an erroneous half slip boundary condition
2325    o added bottom drag and no slip boundary condition capabilities to
2326      oceanic pressure coordinates code
2327    o added new verification experiment global_ocean_pressure, this experiment is
2328      also described in the tutorial section of the manual
2329    checkpoint47d_pre
2330    
2331    checkpoint47c_post
2332    o Added a verification experiment for a global cubed-sphere ocean run
2333      -  verification/global_ocean.cubed32x32x30
2334      -  uses pkg/therm_seaice and pkg/bulk_forcing
2335    
2336    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2337    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2338      when using P-coordinate; only implemented for atmospheric config.
2339    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2340      NOTES: requires option NONLIN_FRSURF to be "#define".
2341    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2342    
2343    checkpoint47b_post
2344    Merging from release1_p9:
2345    o pkg/seaice
2346      - removed GOTO's and added taf directives
2347      - double precision constants to reduce the g77 (Linux)
2348        to F77 (SGI) differences reported in release1_p8
2349    o tools/genmake
2350      - added SGI options
2351    o verification/testscript
2352      - updated to that of checkpoint47a_post
2353    o verification/global_ocean.90x40x15/input/eedata
2354      - modified for SGI f77 compatibility
2355    o verification/lab_sea
2356      - added description of sea-ice model
2357      - added missing matlab routines
2358      - added test of thermodynamics parallelization
2359    
2360    checkpoint47a_post
2361    o new pkg: aim_v23
2362     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2363       for now, keep the same surface forcing as before.
2364     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2365     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2366     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2367    o add diagnostic of surface correction term in monitor output
2368    
2369    o bulk_force and therm_seaice
2370    - Two packages:  bulk_force (Bulk forcing)
2371      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2372    - Earlier integration from Stephaine Dutkiewicz
2373      and Patrick Heimbach.
2374    - Two ifdef statements for compile time,
2375       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2376    
2377    checkpoint47
2378    differentiable version of checkpoint46n_post
2379    o bug fix in quasihydrostaticterms
2380    o * "clean" adjoint code (in terms of extensive recomputations)
2381        can now be obtained for all GMREDI options (i.e. for
2382        - GM_VISBECK_VARIABLE_K
2383        - GM_NON_UNITY_DIAGONAL
2384        - GM_EXTRA_DIAGONAL
2385        - GM_BOLUS_ADVEC )
2386      * However, wrong gradient check problem remains unsolved.
2387      * New CPP options have been introduced for different
2388        tapering schemes
2389    o external_fields_load now part of differentiation list
2390    o pressure needs multiple storing;
2391      would be nice to have store_pressure at beginning or
2392      end of forward_step, e.g. by having phiHyd global (5-dim.)
2393      (NB: pressure is needed for certain cases in find_rho,
2394      which is also invoked through convective_adjustment).
2395    o recomputations in find_rho for cases
2396     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2397    o #define ATMOSPHERIC_LOADING should be differentiable
2398    o ini_forcing shifted to begining of initialise_varia
2399    o Incorporating QNVS line search routines into MITgcm
2400      (this is separate code, and therefore not under pkg)
2401      lsopt/, optim/
2402    o Updated verification/carbon/
2403      - #define GM_VISBECK_VARIABLE_K
2404      - GM_taper_scheme    = 'ldd97'    
2405    
2406    checkpoint46n_post
2407    Merging from release1_p8:
2408    o verification/natl_box:
2409      updating new external_fields_load routine
2410    o New package: pkg/seaice
2411      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2412      The sea-ice code is based on Hibler (1979-1980).
2413      Two sea-ice dynamic solvers, ADI and LSR, are included.
2414      In addition to computing prognostic sea-ice variables and diagnosing
2415      the forcing/external data fields that drive the ocean model,
2416      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2417      The implied surface heat flux is then stored in variable
2418      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2419      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2420      non-local transport term.  Because this call precedes model
2421      thermodynamics, temperature under sea-ice may not be "exactly" at
2422      the freezing point by the time theta is dumped or time-averaged.
2423      N.B.: fairly large differences in accuracy occur across
2424            different platforms/compilers; comparison between
2425            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2426            generated output gives:
2427       T           S           U           V
2428      C D M    c        m  s        m  s        m  s        m  s
2429      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2430      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2431      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2432    
2433      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2434    o GAD:
2435      - generated new common blocks to account for call of
2436        same gad routines with differing traceridentities
2437        (needed to modify tracerIdentity indices in GAD.h)
2438      - generated separate common blocks for case useCubedSphereExchange
2439        (Department of Futurology)
2440      - parameter lists to gmredi_?transport: added tracerIdentity
2441      - added new key indices to tamc.h
2442    o external_fields_load:
2443      - added this routine to TAF list
2444      - needed to make some common blocks global and additional storing
2445        along the same lines as exf package (checkpoint_lev?_directives.h)
2446    o exf:
2447      updated external forcing package
2448      - bug fixes carried over from ecco-branch
2449        (missing OBCS_OPTIONS.h in two routines)
2450      - enable easy to use "no forcing".
2451      - added exf I/O for atmospheric loading
2452      - added exf I/O for runoff data
2453      - transfered scaling between exf <-> MITgcm to exf namelist
2454    o Adding new verification experiment global_with_exf.
2455      This verification experiment is almost identical to the
2456      global_ocean.90x40x15 experiment, except that it uses
2457      the exf (and cal) package instead of the
2458      external_fields_load routine (cf README file).
2459    
2460    checkpoint46m_post
2461    o modified testscript to return -- when there are no lines of "%MON" output
2462    o added new flag "quasiHydrostatic" for QH mode
2463      and new routine quasihydrostaticterms()
2464    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2465      New routine: mom_u_coriolis_nh()
2466    o fixed sign of non-hydrostatic metric terms in u and v equations.
2467      Depend on correct sign of gravitySign.
2468    o added work.pc* to .cvsignore in aim directories using ifc
2469    o introduced flag for controllin non-hydrostatic metric terms
2470    o removed gravitySign from PARM04
2471    o switched to g77/ifc from pgf77 in aim experiments
2472    
2473    checkpoint46l_post
2474    o made convective adjustment work with pressure coordinates:
2475     - changed the direction of k-loop in convective_adjustment.F for the
2476       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2477     - adjusted the reference pressure k-index in convective_adjustment.F
2478     - adjusted the convection condition in convect.F (in analogy to
2479       calc_ivdc.F)
2480     - convective_adjustment no longer computes anything on the halos
2481     - removed the warnings about negative salinity from find_rho.F and
2482       find_alpha.F; instead the new routine look_for_neg_salinity, called
2483       at the beginning of find_rho, find_alpha, and find_beta, does a
2484       check of the entire slice, if CPP-option
2485       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2486    checkpoint46l_pre
2487    
2488    checkpoint46k_post
2489    o fixed the verification/global_ocean.90x40x15 experiment:
2490     - new bathymetry (the world according to A., JMC, and M.)
2491     - new initial fields and forcing fields (*.bin files)
2492     - new POLY3.COEFFS (for the next release one should switch to a full
2493       equation of state: JMD95P or MDJWF)
2494     - fixed several errors and redundancies in the data file
2495     - experiment uses looped cells
2496     - added matlab directory with diagnostic scripts for plotting of output
2497    
2498    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2499     - read AIM physics parameters from a file (data.aimphys)
2500     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2501    
2502    checkpoint46j_post
2503    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2504    o move wVel computation at the end of the time step, in S/R integr_continuity
2505    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2506    o update timeave pkg for wVel diagnostic.
2507    checkpoint46j_pre
2508    
2509    checkpoint46i_post
2510    o Clean up AIM package (and keep the results unchanged):
2511      include CPP_OPTION and use IMPLICT NONE in all routines ;
2512      declare all the variables _RL ; use _d 0 for all numerical constants.
2513      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2514    
2515    checkpoint46h_post
2516    o cleaned up the use of rhoNil and rhoConst.
2517      - rhoNil should only appear in the LINEAR equation of state, everywhere
2518        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2519        and the dynamical equations are all divided by rhoConst
2520    o introduced new parameter rhoConstFresh, a reference density of fresh
2521      water, to remove the fresh water flux's dependence on rhoNil. The default
2522      value is 999.8 kg/m^3
2523    o cleanup up external_forcing.F and external_forcing_surf.F
2524      - can now be used by both OCEANIC and OCEANICP
2525    checkpoint46h_pre
2526    
2527     Added code to convert surface volume flux (fresh water) into
2528     a mass flux when using P coordinates in the ocean (OCEANICP).
2529     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2530    
2531    checkpoint46g_post
2532    o Include a new diagnostic variable phiHydLow for the ocean model
2533      - in z-coordinates, it is the bottom pressure anomaly
2534      - in p-coordinates, it is the sea surface elevation
2535      - in both cases, these variable have global drift, reflecting the mass
2536        drift in z-coordinates and the volume drift in p-coordinates
2537      - included time averaging for phiHydLow, be aware of the drift!
2538    o depth-dependent computation of Bo_surf for pressure coordinates
2539      in the ocean (buoyancyRelation='OCEANICP')
2540      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2541        Theta, Salinity, and Pressure in the parameter list. This routine is
2542        presently contained in find_rho.F. This routine does not give the
2543        correct density for 'POLY3', which would be a z-dependent reference
2544        density.
2545    o cleaned up find_rho
2546      - removed obsolete 'eqn' from the parameter list.
2547    o added two new verification experiments: gop and goz
2548      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2549    checkpoint46g_pre
2550    
2551    checkpoint46f_post
2552    o Enable tangent linear (forward mode) gradient checks:
2553      - extended active file handling to g_... files
2554      - added TANGENT_SIMULATION to theSimulationMode
2555      - extended grdchk package accordingly
2556    o added tangent linear setup in verification/carbon/code_ftl
2557    o added adjoint setup in verification/front_relax/code_ad
2558    
2559    checkpoint46e_post
2560    o Added new equation of state -> MDJWF
2561      - EOS of McDougall et al., 2002, JAOT, submitted
2562      - caveat: the equation of state is only valid for a smaller (more
2563        realistic?) range of values than JMD95P/Z and UNESCO
2564      - added masks to the calculation of pressure in store_pressure
2565      - added more check values for density in check_eos (ini_eos.F), some of
2566        the old check values are out of the range of the MDJWF-eos, so don't
2567        expect perfect matches for those
2568    checkpoint46e_pre
2569    
2570    checkpoint46d_post
2571    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2572      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2573      case of pressure coordinates. eosType='JMD95Z' in
2574      combination with buoyancyRelation='OCEANICP' now causes an error.
2575    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2576      in find_alpha/beta.
2577    checkpoint46d_pre
2578    
2579    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2580      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2581    
2582    checkpoint46c_post
2583    o Changes necessary for ocean in p-coordinates
2584     -  Added new buoyancy relation = 'OCEANICP'
2585     -  Added new parameters = gravitySign (this used to be contained inside
2586        the factor dRdZ which I added when we first switched to R coordinates).
2587     X GM/Redi is not compatible (yet)
2588     X bottom drag and no-slip need to be debugged.
2589    checkpoint46c_pre
2590    
2591    checkpoint46b_post
2592    o Added new equation of state -> JMD95Z and JMD95P
2593      - EOS of Jackett and McDougall, 1995, JAOT
2594      - moved all EOS parameters into EOS.h
2595      - new routines ini_eos.F, store_pressure.F
2596    o Added UNESCO EOS, but not recommended because it requires
2597      in-situ temperature (see JMD95)
2598    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2599      unesco.f to be used with POLY3
2600    checkpoint46b_pre
2601    
2602    checkpoint46a_post
2603    o Added (atmospheric) pressure loading
2604      - new field in FFIELDS.h, etc...
2605      - new cpp flag ATMOSPHERIC_LOADING
2606    o Changed hFacC to _hFacC in calc_phi_hyd.F
2607    o Added SHORTWAVE_HEATING to some files for consistency
2608    checkpoint46a_pre
2609    
2610    checkpoint46
2611    further merges from release1_p5
2612    o new ctrl package
2613      - adopted from ECCO environment to enable optimization
2614      - added Eliassen Palm fluxes to controls
2615    o added Eliassen Palm flux controls to gradient check package
2616    o cost package
2617      - Compatible with new ctrl package
2618      - added Eliassen Palm cost hooks
2619      - modif's of existing cost functions
2620    o Adjoint-related bug fixes in kpp:
2621      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2622      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2623    o autodiff package
2624      - flow directives:
2625        + new for S/R do_the_model_io
2626        + enhanced for S/R checkpoint
2627        + new gmredi.flow
2628      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2629        disable adcommon.h/g_common.h by default.
2630      - fixed problem for adjoint of global_max
2631    o modified verification/carbon/
2632    o New setup for adjoint of global_ocean
2633    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2634    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2635    o incorporated hooks for sponge layer code (external_forcing.F)
2636    
2637    checkpoint45d_post
2638    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2639    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2640      (affects plume_on_slope "cg2d" output)
2641    o add new parameter deltaTfreesurf for free-surface time stepping
2642    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2643    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2644    o change phiMin in exp1 (to agree with documentation)
2645    o add new flags:
2646     - T,S forcing inside/outside Adams-Bashforth
2647     - turn off temp,salt advection and/or forcing
2648     - for each tracer, define internal flag for multiDimAdvection & A-B
2649    o monitor: change definition of KE to check conservation of Energy
2650    
2651    checkpoint45c_post
2652    o Removed f90 comments ("!")
2653    o Modified initialisations to enable exf package for MITgcm
2654      (without invoking ECCO_PACKAGE).
2655    o modifications to gradient check package (Martin Losch)
2656      - enable centered differences
2657      - modified format of standard output
2658    
2659    checkpoint45b_post
2660    o cleaned exchange calls in cg2d
2661    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2662    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2663      to configure barotropic setup (Martin Losch)
2664    o moved some initialisations within bi,bj loop in dynamics
2665      (TAF flow dependency)
2666    o in initialise_varia, moved call packages_init_variables
2667      before convective_adjustment_init
2668      (corresponding adjustment of TAF tape initialisation).
2669    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2670    
2671    checkpoint45a_post
2672    o compute Rho over the whole domain (extend iMin,jMin indices)
2673    o specific exchange for X-slice domain (case Ny=1)
2674    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2675    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2676    
2677    checkpoint44h_post = checkpoint45
2678    o Fix to restore differentiability:
2679      place at which packages_init_variables is called in
2680      initialise_varia is crucial for reverse control flow.
2681    o modifications in GMRedi to enable stable adjoint
2682      (corresponding modif's in thermodynamics, dynamics)
2683    o added missing hook for sponge layer code in external_forcing
2684    o modified test cost functions
2685    o storing in gad_advection (plus removal of write(0,*)!
2686    o missing headers TR1.h added in convective_adjustment routines
2687    o errorMessageUnit set non-equal zero in eeboot
2688      (conflict on some platforms, e.g. IBM SP3)
2689    o modified carbon verif.
2690    
2691    checkpoint44h_pre
2692    o vertical grid option: allow to put the Interface at the middle between
2693      2 cell-centers ; replace delZ in pkg/kpp by drF.
2694    o GM Advective form: Tracers are advected using the residual transport (=
2695      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2696    
2697    checkpoint44g_post
2698    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2699      results) ; ifdef missing in thermodynamics.F
2700    
2701    checkpoint44f_pre,checkpoint44f_post
2702    o added PTRACERS package
2703      This allows an arbitrary number of passive tracers to be integrated
2704      forward simultaneously with the dynamicaly model.
2705      + Implemented so far:
2706        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2707        - I/O and checkpointing
2708        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2709      + Not implemented so far:
2710        - KPP
2711        - OBCS
2712      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2713        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2714        line in data.pkg.
2715      + This package is disabled by default since it increases storage.
2716    
2717    
2718    o testscript: added -cleanup option
2719    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2720                 b) enable to filter 2D fields.
2721    
2722    checkpoint44e_pre,post
2723    o re-wrote convective adjustment to use pre-calculated weights
2724      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2725      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2726      Original calls to convect() still in place.
2727    
2728    chkpt44d_pre,post
2729    o added missing EXCLUDE_MONITOR flags
2730    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2731      (incompatible typ in MIN/MAX expressions caused problems
2732      on IBM SP3)
2733    o in genmake added variable MAKEDEPEND
2734      plus resetting for case SunOS
2735    o added timer_stats.c routine for IBM SP3
2736    o removed variables in dynamics
2737    !!! I forgot to create tag chkpt44d_pre !!!
2738    !!! But chkpt44d_pre = chkpt44c_post    !!!
2739    
2740    o real fresh water flux implemented with non-linear free-surface.
2741    
2742    chkpt44c_pre,post
2743    o few fix (mask in shap_s2, EmPmR in external_field_load,
2744      USE_NATURAL_BCS in solve_for_P);
2745    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2746    
2747    checkpoint44b_pre/_post
2748    o merge of relevant stuff from the ecco-branch:
2749      - genmake: removed $S64 overwrite for case SunOS
2750      - pkg/exf: update and corrections for field swapping and obcs
2751      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2752                  harmonized between ECCO and MITgcm
2753      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2754                      updated checkpointing_lev... lists for obcs
2755      - model/src: minor changes in forward_step, plot_field
2756                   added directive for divided adjoint in the_main_loop
2757      - pkg/mdsio: added mdsio_gl_slice
2758    
2759    o check parameters & config (chkpt44a_pre,post)
2760    o OBC and NonLin_FrSurf.
2761    
2762    checkpoint44
2763    o fix bug in mom_vi_del2uv
2764    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2765    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2766    o update AIM experiments (NCEP input files)
2767    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2768    o added some stuff for AD
2769    
2770    checkpoint43
2771    o added two new advection tests
2772    o added global 4x4 degree ocean test
2773    o added test of H&S94 with free surface on cube
2774    o some final mods for gradient check, adjoint,...
2775    
2776    checkpoint42
2777      Fixed AD-related problems:
2778    o Store directives up-to-date with re-arranged Adams-Bashforth
2779      (mainly thermodynamics.F)
2780    o New store directives for multi-dim. advection schemes
2781      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2782      * new common block and key passkey
2783      (mainly gad_advection.F)
2784    o Modified store directives for split of dynamics/thermodynamics
2785      for the case ALLOW_KPP
2786    o Cleaned argument list for timestep_tracer.F
2787    
2788    checkpoint41
2789    o re-formatted/added comments in prologues of key subroutines
2790      to work with protex
2791    
2792    checkpoint40
2793    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2794    o added FLT (floats) package from Arne along with demo. experiment
2795    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2796      implementation of forward-in-time forcing terms
2797    o more mods for non-linear free-surface including new variable
2798    o modified multi-dim method to work on cube
2799    o bug fix in KPP (from DM)
2800    
2801    checkpoint40pre9
2802    o added DST advection schemes
2803    o fix MPI bug on SGI's
2804    o modifications for non-linear free-surface
2805    o fixed conditionals for fixed flow/passive tracer only mode
2806    o added tension/strain form of stress tensor
2807    o changes to commenting of arguments for TAF/TAMC
2808    o added/updated many matlab scripts
2809    o added multi-dimensional advection method for tracers
2810      
2811    checkpoint40pre8
2812    o new package rw/
2813      Added method for dumping intermediate local arrays:
2814      mdsio_writetile - same as mdsio_writefield except works from inside
2815                        bi,bj loop
2816      mdsio_writelocal - same as mdsio_writetile except works for local
2817                         arrays
2818      write_local_r? - higher-level wrapper for mdsio_writelocal
2819      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2820      Example given at end of mom_vecinv.F that dumps some local arrays.
2821    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2822      control flux-form versus vector invariant code.
2823      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2824      or genmake -DISABLE ...
2825    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2826      (additional storing is now needed for case vecinv;
2827      currently nothing implemented to switch this storing off
2828      in case fluxform is used since no CPP flag available).
2829    
2830    checkpoint40pre7
2831    o bug fix in dynamics.F
2832      calc_viscosity called before k=1,Nr loop.
2833    o added some #ifdef's ALLOW_PASSIVE_TRACER
2834    o cleaned initialisations in ctrl_map_ini
2835      related to TAF
2836    
2837    checkpoint40pre6
2838    o split dynamics into thermodynamics & dynamics
2839    o corresponding split of calc_diffusivity into
2840      calc_diffusivity, calc_viscosity
2841      (kpp_calc_diff, kpp_calc_visc).
2842    o Added diffkr, kapgm to control variables
2843    o bug fix in gmredi_slope_limit for ldd97
2844    
2845    checkpoint40pre5
2846    o proper initialization of Adams-Bashforth time stepping
2847      + uses forward step for very first step of model (iter=0)
2848    o re-generated *all* output since almost all output is modified by this
2849      change (sorry but we've been putting this one off for about 2 years)
2850      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2851        *not* regenerated since they are already out of date and I don't
2852        want to create the impression that they are suddenly working.
2853    o removed KAP stuff for DEC's
2854    o modified/added many .cvsignore files in */code and */input
2855    o added new expt "solid-body.cs-32x32x1"
2856      + this uses an alternative form of ini_curvilinear_grid.F which
2857        is not necessarily any better than the current one...
2858    
2859    checkpoint40pre4
2860    o added re-initialisations of utrans,vtrans,rtrans in
2861      calc_common_factors which are crucial for TAF.
2862    o extended iMin,jMin range for calc_common_factors,
2863      calc_diffusivity
2864    o added option ALLOW_PASSIVE_TRACER
2865    o a few minor updates and fixes
2866    
2867    checkpoint40pre3
2868    o created calc_gtr1.F for gad package
2869    o split the_main_loop and re-introduced forward_step
2870    o some recomputations of nIter0 for TAMC
2871    
2872    checkpoint40pre2
2873    o Updated to latest branch of AJA, JMC
2874    o Added gradient check package
2875    o Added routines for passive tracer handling
2876    o Added carbon sequestration sensitivity experiment
2877    
2878    checkpoint39
2879     o Modifications and fixes to support TAMC
2880       (mainly missing or wrong directives)
2881     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2882       in addummy_in_stepping
2883     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2884     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2885     o Included following packages:
2886       cal: calendar
2887       exf: external forcing
2888       ecco: essential routines to control use of cal, exf
2889             (NB: this is not the full ECCO environment)
2890     o disabled some packages by default in genmake
2891    
2892    checkpoint38
2893     o see notes_c37_adj.txt
2894     o corrected wrong layer index in external_forcing_t
2895     o replaced the_main_loop/forward_step by the_main_loop
2896     o removed forceoutput from write_state
2897       (replaced criteria for initial/final state)
2898     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2899    
2900    checkpoint37
2901     o mdsio.F routine split and packaged in pkg/mdsio
2902       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2903        used unless genmake -disable=mdsio)
2904     o allow a more precise surface-geopotential gradient for the atmosphere
2905       taking into account the change in space of Alpha (=1/rho) at the surface.
2906     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2907       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2908     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2909       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2910       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2911     o Time-Average diagnostics defined as a pseudo package "timeave".
2912     o pickup files : old pickup (before c35) did not work with new code (c35
2913       and after) unless activating 2 commented lines in initialise-varia.
2914     o Non-Hydrostatic pickup file Pb fixed.
2915     o bug with Rigid-lid version (since c35) fixed.  
2916    
2917    checkpoint36
2918     o implement Crank-Nickelson barotropic time-stepping
2919     o recover Time-Average diagnostics
2920     o fix Pb in checkpoint (PR#19)
2921     o AIM become a standard package ; clean unused CPP_kees
2922    
2923    checkpoint35
2924     o subtantial rewrite of dynamics.f
2925     o allows staggered time-stepping
2926     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2927     o added bottom drag (linear + quadratic)
2928    
2929    checkpoint34
2930     o Modified exchange routines for correct reverse simulation.
2931     o Added verification output to comply with bug fix in impldiff.F
2932       as of c33 (exp2, natl_box).
2933     o Corrected store directives in dynamics.F
2934     o Corrected array boundaries in impldiff.F
2935     o Corrected array dimensions in gmredi.
2936       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2937     o Added routine GLOBAL_SUM_INT to global_sum.F
2938     o Added mdsio_gl.F for ECCO purposes.
2939    
2940    checkpoint33
2941     o Fixed bug in lower BC in impldiff.F
2942     o Fixed confusion about units of forcing arrays in FFIELDS.h
2943       namely Fu,Fv,Qnet,Qsw,EmPmR:
2944       - Removed verification/natl_box/code/external_fields_scale.F
2945         (did not differ from that in model/src)
2946       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2947         (see FFIELDS.h for description)
2948       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2949         kpp_calc.F and kpp_transport_t.F
2950       - Removed model/src/external_fields_scale.F and calls to it
2951       - verification/natl_box uses flux data with "atmospheric" sign so
2952         a special version of external_fields_load.F is used to
2953         change the data as it's read in. This way, the arrays
2954         have the right units and signs at all times tha a user could
2955         possibly use them.
2956     o Corrected genmake to delete a temporary file during configuration
2957    
2958    checkpoint32
2959     o Scaling of forcing fields moved from external_forcing.F to
2960       external_fields_scale.F, called directly after loading fields.
2961     o Surface relaxation terms added to surface tendency fields in
2962       extra subroutine.
2963     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2964       fields.
2965     o Changes in GMRedi to comply with packaging structure.
2966     o Modifications and bug fixes in KPP package.
2967     o Verification experiment for KPP added (verification/nat_box/)
2968    
2969    checkpoint31
2970     o Packages interface brought in line with defined standard
2971       -> new routines packages_...F
2972       -> changes in initialise_fixed.F, initialise_varia.F
2973       -> enables initialisation interface for ECCO package
2974     o Rescaling of external forcing fields immediately after read
2975       (removed from external_forcing.F)
2976       -> new: surface_fields_scale.F
2977       -> affects ini_foorcing.F, external_fields_load.F
2978     o Computation of surface tendencies before tendency updates.
2979       -> new: external_forcing_surf.F
2980     o Change of variable names useGMRedi, useKPP, useECCO
2981     o Further changes in dynamics.F, impldiff.F for TAMC
2982     o Tested for experiments 0, 2, 4.
2983       - not yet tested for GMRedi.
2984       - not yet tested for KPP.
2985    
2986    checkpoint30
2987     o Updates for OBCs
2988     o New experiment for test OBCs (internal_wave)
2989     o New output.txt in verification/exp4/results/
2990     o Updates for KPP: calculation of viscosity corrected, new variables
2991       kpp_dumpFreq and kpp_taveFreq
2992     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
2993       and entry for T90 in genmake
2994    
2995    checkpoint29
2996     o packaged KPP and GM/Redi
2997    
2998    checkpoint28
2999     o Corrected initialization of hFacMin for difference vertical coordinates
3000     o Modified calculation of partial cell thickness to more robust algorithm
3001     o config_summary.F: replaced write_1D_... by write_0D_...
3002       read_write.F: added subroutines write_0D_...
3003     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
3004       included some initialisations required for TAMC.
3005     o routine calc_isoslopes: modified sqrt computation to make it
3006       differentiable for zero argument.
3007     o routines dynamics, impldiff:
3008       included store directives and tape key computations required for TAMC.
3009     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
3010    
3011    checkpoint27
3012     o fixed calc_isoslopes() to so that cancellation of terms in tensor
3013       formulation works properly with variable resolution.
3014     o restructured the calling tree between the_model_main() and dynamics()
3015     o split initialise() into initialise_fixed() and initialise_varia()
3016     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
3017       in new routine ini_psurf()
3018    
3019    checkpoint26
3020     o moved some #ifdef in optional routines to encompass everything
3021       except the argument declarations. This was using up some memory.
3022     o fixed macros like _ADT to work with both versions of Linux cpp
3023     o cleaned up some unused and uninitialized variables
3024       (helps when debugging with strict compile options)
3025     o split up CPP_EEOPTIONS.h into options and macros
3026       (macros are now in eesupp/inc/CPP_EEMACROS.h)
3027     o patch for 2 processor JAM mode
3028    
3029    checkpoint25
3030     o updates for OBCs and NH
3031     o dramatically reduced memory usage
3032     o added "JAM" routines for use on Artic network
3033     o parameterization of convection by implicit vertical diffusion
3034     o added a diagnostic of convective index
3035     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
3036       (this is was partly for OBCs and NH but also in anticipation of
3037        an explicit free-surface option)
3038     o initial state input files for U and V
3039    
3040    checkpoint24
3041     o Removed some spurious "REAL"s
3042     o Updated KPP to latest version from JPL
3043     o Added a COS(latitude) in horizontal viscosity
3044    
3045    checkpoint23
3046     o Added del^4 diffusion for salt and temperature
3047     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
3048    
3049    checkpoint22
3050     o Made many small changes: implicit none, format(i5), etc...
3051     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
3052    
3053    checkpoint21
3054     o Introduced new I/O package that supports direct-access records (mdsio.F)
3055     o Split-up mid-level I/O routines
3056     o Updated input data for experiments 0,1,2,4 and 5
3057     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
3058    
3059    checkpoint20
3060     o Tidied up open-boundaries some more
3061     o Added non-hydrostatic code
3062     o Fixed some input data
3063     o Modified MPI start-up to work in "coupled" context.
3064    
3065    checkpoint19
3066     o Tidied up directory structure for verification experiments.
3067     o Added new code for open boundaries.
3068     o Corrected advective terms near boundaries.
3069     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
3070     o Implemented free-slip/no-slip BCs and del^4 dissipation.
3071     o Split default parameters out of ini_parms.F into set_defaults.F.
3072    
3073    checkpoint18
3074     o Further changes for optional code generation with
3075       CPP - ugh!
3076    
3077    checkpoint17
3078     o Beginning to incorporating modularity
3079       for supporting atmos. and ocean configs.
3080     o Small changes for TAMC complinace
3081     o New ultra simple test case. Barotropic box
3082       configuration "exp0".
3083    
3084    checkpoint16
3085     o Minor changes to exchange routines to support
3086       accumulation in reverse mode. Adjoint of an
3087       assignment is an addition.
3088     o Changes to support compilation by TAMC (LR(1)
3089       syntax) and by g77 under Linux ( 72 character
3090       limit ).
3091    
3092    checkpoint15
3093     Rewrote exchange routines to allow
3094     o General tile <-> tile connectivity.
3095     o TAMC reverse mode flag ( is this really needed? )
3096     o Variable width overlap and exchange region widths.
3097     o Hooks for sharing data via DMA, Arctic, Memory Channel,
3098       shmput/shmget, VIA, SYSV shmem and every other cool
3099       communication method.
3100    
3101    checkpoint14
3102     Consistent isomorphism chages made. These allow dynamical core
3103     to support both pressure and meters as a vertical coordinate.
3104    
3105    checkpoint13
3106     Release which corrects global_max problem and a couple
3107     of KGM time-averaging diagnostic errors. Also contains
3108     a double-gyre experiment setup as well as the baseline
3109     4 degree global template. The double gyre template is
3110     organised to allow it to be applied automatically to
3111     the baseline configuration.
3112    
3113    branch-point-rdot
3114     A few tidy-ups have been made bt the real point of this
3115     check-point (excuse the pun) is to allow a branch to be
3116     made for the purposes of adding the rDot alterations.
3117     I don't want to commit the rDot to the main-trunk until
3118     we've actually tested it...
3119    
3120    checkpoint12
3121     Tidy up and added generic genmake script (formerly
3122     configure script).
3123     Released to testers.
3124    
3125    checkpoint11
3126     Re-arranged initialise() and introduced ini_vertical_grid()
3127     and ini_masks_etc().
3128    
3129  checkpoint10  checkpoint10
3130   Introduced the configure script.   Introduced the configure script.
3131   Separated out the diags package.   Separated out the diags package.

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