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revision 1.100 by adcroft, Thu Nov 7 21:51:11 2002 UTC revision 1.672 by dimitri, Thu Jun 8 23:09:55 2006 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o pkg/ggl90: fix sloppy output and fix a bug
8    o pkg/seaice: added SEAICEuseEVPpickup parameter
9      - Set to false in order to start EVP solver with
10        non-EVP pickup files when using SEAICEuseEVP
11    
12    checkpoint58h_post
13    * Modifications for bottom topography control
14      o replace hFacC by _hFacC at various places
15      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
16      o add non-self-adjoint cg2d_nsa
17      o update autodiff support routines
18      o re-initialise hfac after ctrl_depth_ini
19      o works for 5x5 box, doesnt work for global_ocean.90x40x15
20    * Adding verification for 5x5 box (4-layer) bottom topography control
21    
22    checkpoint58g_post
23    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
24       used for mean seasonal cycle, mean diurnal cycle); add an example
25       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
26    o pkg/ggl90:
27      - add parameter (minimum surface kinetic energy)
28      - fix bug (avoiding division by zero)
29    o couple pkg/thsice to pkg/seaice:
30      - modify advection in seaice to accomodate new scalar fields to be advected
31      - only muliDimAdection scheme work with seaice/thsice
32      - mapping of thsice-variables to seaice-variables, back and forth
33      - does not break the verification experiments, but does not give the
34        desired results either
35    o pkg/seaice
36      - make (default) second order advection a bit less confusing?
37    
38    checkpoint58f_post
39    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
40      to pkg/seaice):
41      - new routines thsice_map_exf and thsice_get_exf provide the interface
42      - add an additional formal parameter to thsice_solve4temp
43    o pkg/exf:
44      - add new fields wspeed, snowprecip (to be able to couple to thsice)
45      - correct Stefan-Boltzmann constant
46      - new parameter for longwave surface emittance
47      - separate some stuff from exf_bulkformulae into new routines  
48        exf_radiation, exf_wind
49      - add new parameters and constants: longwave emissivity for ocean, ice
50        and snow, evaporation parameters over ice
51      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
52        either wind from stress or stress from wind
53    o pkg/thSIce:
54    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
55    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
56       and THSICE_CALC_THICKN
57    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
58    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
59      to make debugging easier.
60    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
61    o pkg/bulk_force:
62      - clean-up comments and parameters ;
63      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
64    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
65      generate new output for test-experiment: aim.5l_cs.thSI
66    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
67      testreport accordingly
68    
69    checkpoint58e_post
70    o SEAICE_CGRID adjoint done
71    o R_STAR adjoint implemented.
72      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
73      * need to sort out init. of h0facc, etc.
74    o Make pkg/profile fully independent of ecco,cost, etc. stuff
75      to be able to use it in pure forward.
76    
77    checkpoint58d_post
78    o upgrade simple test-experiment to tutorial example:
79     step.1: duplicate the experiment and (step.2) will remove the old copy.
80      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
81      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
82      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
83      tutorial_global_oce_biogeo    <- copy of dic_example
84      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
85      tutorial_plume_on_slope       <- copy of plume_on_slope
86      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
87      tutorial_global_oce_optim     <- empty for now (David ?)
88      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
89     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
90    o correct a sign problem in cost_scat.F
91    o obcs and ptracers: fix boundary conditions for advections schemes
92      with larger stencil
93    o thsice adjoint: start
94    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
95      completeness
96    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
97      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
98    o ptracers adjoint:
99      * avoid extensive recomputatations
100      * fix missing re-init. of gptr (missed by TAF)
101    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
102      me to turn off the excessive output to STDOUT that this package produces
103    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
104      and add those terms in Vector-Invariant formulation.
105    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
106      if the control period (xx_hfluxperiod etc) is 0
107    o in profiles pkg, clean routines and fix details
108    o in ecco pkg, reading ssh data:
109      fix problem in case the model does not start at iter0=0
110    o fix mnc-pickup/restart for ptracers
111    o new package prifiles:
112      code to compute profile-based cost by Gael Forget
113      (modifs in ecco, ctrl, autodiff)
114    o Benign bug fix in initialization (spotted by M. Mazloff) of
115      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
116    
117    checkpoint58c_post
118    o adjoint: finish NLFS adjoint and provide reference output in
119      verification/global_ocean.90x40x15/results_ad_nlfs
120    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
121      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
122      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
123      with SEAICE_CGRID defined.
124    o move calendarDumps from "data" to "data.cal" and clean-up the code
125      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
126    o add useEXF & useCAL flags (for now, set in hard-coded way)
127    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
128      (were missing in NH mode, and wrong in quasihydrostatic mode).
129      waiting for Chris updated version of calc_gw to add those CALLs.
130    o fix bug in quasihydrostatic S/R ;
131      add a test for this option: global_ocean.90x40x15.qshyd
132    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
133      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
134    o add on/off flag useOffLine for package OFFLINE
135    o seaice:
136      - modify advection so that it works also on the C-grid
137      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
138        problem in multi-tile runs with C-grid
139      - add flags for clipping ice velocities and/or masking solver forcing
140      - fix drag (ocean on ice) formulation and a bug that caused noise in the
141        C-grid solver
142      - added a few comments to seaice_diffusion.F
143      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
144        are now exclusive)
145      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
146        required re-ordering the code a little:
147       + make DAIRN global variable (defined in SEAICE)
148       + move computation of the viscosities eta and zeta into a new separate
149         routine (because I need to recompute them in seaice_ocean_stress.F)
150    
151    checkpoint58b_post
152    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
153      update output.txt of exp. aim.5l_cs.thSI
154    o various mnc cleanups and improvements:
155      + shrink lookup tables by factor of ~4
156      + better error reporting when running out of lookup space
157      + able to handle longer path/file names (up to 500 chars)
158    o adjoint:
159      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
160      - TBD: "hidden" mom_vecinv recomp. in dynamics
161    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
162     (allow to differentiate between forcing components using new integer flags:
163      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
164     and add new flag to put Dissipation tendency out of Adams-Bashforth.
165    o ecco
166      - enable trend removal from SSH anomaly obs.
167    o adjoint
168      - a fix for PmEpR when #undef EXACT_CONSERV
169      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
170      - try to fix "hidden" recomp. in forward_step for NLFS
171        (NLFS seems broken sometimes after I checked it in)
172    o seaice:
173     - add c-grid version of the dynamic solver:
174       + three new routines that are the c-grid substitute lsr, dynsolver
175         and ostres
176       + put a few fields that were local to dynsolver into global common
177         blocks, so that I can move the computation of stresses etc into
178         seaice_lsr (saves coding but may break the adjoint).
179     - replace more hardwired parameters by runtime parameters
180     - add ice masks that mask the rhs of the implicit solvers where there
181       is no ice (commented out in seaice_dynsolver, because i am not sure
182       if this works properly), eventually this should replace the clipping
183       of ice velocities in seaice_dynsolver to +/-40cm/s.
184    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
185      include it only where its needed
186    o move balancing of fluxes before the call of external_forcing_surf
187    o seaice:
188      - correct units of turning angles (now they are really in degrees)
189      - move computation of GWATX/Y out of main routine into dynsolver
190      - initialize GWATX/Y in seaice_init
191    o Apply mask on Fresh-Water flux (needed for SSH forcing).
192      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
193    o seaice: add runtime flags for turning angles (default to zero)
194    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
195      and trend from exf forcing and ctrl control adjustments
196    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
197      (since checkpoint57x_post)
198    o change the default rotation period to 86164.s = the Earth rotation
199    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
200      and based on a reference stratification. Tested within hs94.cs-32x32x5.
201    o seaice advection: add code for choosing between the default (2nd order
202      central differences) and multiDim advection schemes provided by
203      pkg/generic_advdiff
204    o seaice:
205      - removed all references to SEAICE_GRID.h fields from
206        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
207        (cubed-sphere configuration will change a little)
208      - grid computations in seaice_init are obsolete now.
209      - cleaned up code a little so that is easier to read (hopefully).
210      - added new (better?) discretizations of default advection and diffusion
211        (turn on with SEAICEuseFluxForm)
212      - replace 1 in 3d global fields by kSurface in growth.F
213      
214    checkpoint58a_post
215    o seaice:
216      - bug fix in advect.F
217    o shelfice:
218      - separate shelfice load anomaly from pload (breaks with time
219        dependent forcing), => introduce constant field shelficeLoadAnomaly.
220        Its default is 0., but it may be computed more cleverly from (unknown)
221        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
222        done offline. A good approximation of the pressure load anomaly is
223        necessary to avoid large initial adjustment processes underneath
224        deep-reaching shelfice.
225      - small fix in ISOMIP shelfice_thermodynamics
226      - add more sophisticated thermodynamics of Hellmer (1989), this is
227        now the default
228      - give a few constants more intuitive names
229    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
230      if bulk formulae are used in long integration (especially EmPmR). Turn
231      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
232      if balancePrintMean, the imbalance that is substracted is printed to
233      STDOUT.
234    o fix bug (typo) in obcs_apply_eta.F
235    o add a new package shelfice which enables us to model the circulation
236      underneath shelf-ice with draughts of hundreds of meters.
237     - works
238     - to do: + include improved thermodynamics
239              + check whether kSurfC (from model/inc/SURFACE.h) can be used
240                instead of new field kTopC
241              + can we use topoFile, Ro_surf and existing code in ini_depth.F
242                instead of new field R_shelfIce and new code in ini_depth.F
243                and ini_mask_etc.F?
244              + adjust vertical mixing schemes?
245    o seaice pkg:
246     - add a cpp-flag to include a simple formula for a salinity dependent
247       freezing point of sea water at the surface
248     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
249       meridional stresses are now different (and hopefully correct)
250    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
251       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
252       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
253    o pkg/diagnostics: add options and parameters for regional-statistics
254       diagnostics ; define regions by reading a region-mask from a file
255       (might add other options later)
256    o pkg/bulk_force:
257     - add option and parameters to use AIM surface-flux formulae.
258     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
259       others forcing fields (defined in PARM05, parameter file "data") are loaded
260       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
261     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
262     - use the right EXCH call for uwind,vwind (to work on CS-grid).
263     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
264       and parameters (note: calcWindStress replaces .NOT.readwindstress).
265     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
266    
267    checkpoint58
268    o add "--embed-source" option to genmake2 which, when the supporting
269      tools can be compiled (as determined by genmake2) will turn on the
270      embed_files package which then embeds the entire MITgcm source code
271      (*.[fFhc] + Makefile) used for the build within the executable
272      - requested by CNH but off by default
273      - adds a paltry <9MB to the mitgcmuv executable in most cases
274      - only writes the output when useEMBEDSRC in eedata is true
275    o clean up 3-dim. relaxation codes:
276      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
277      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
278      * Thanks to Tom Haine for testing!
279    
280    checkpoint57z_post
281    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
282      affects output (@ truncation level) of exp. plume_on_slope ; updated.
283    o fix the pickup behavior for obcs in combination with ptracers
284    o fix a bug in ptracers_external_fields_load
285    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
286      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
287    o transfered surface NH pressure to eta field (if exactConserv).
288    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
289         and update lab_sea output.txt file.
290    o completing 3-dim. relaxation code: additional term
291         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
292      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
293      * At compile time, in "EXF_OPTIONS.h" set
294          #define  ALLOW_CLIMTEMP_RELAXATION
295          #define  ALLOW_CLIMSALT_RELAXATION
296      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
297          tauThetaClimRelax3Dim = 15552000.0,
298          tauSaltClimRelax3Dim  = 15552000.0,
299      * 3 cases:
300          1) Use a constant-in-time 3-dim. field
301          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
302          3) Real-time relax. to time-evolving prescribed field
303    o Adding Laplacian-type smoothness constraint on
304      initial and boundary (forcing) controls (ic, bc)
305      * enable at compile-time via
306        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
307      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
308      * Absolute scale somewhat unclear so far
309      * no area weighting was included since no other cost term does so far
310    
311    checkpoint57y_post
312    First step for a NLFS adjoint
313    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
314    o new init. routines for calc_r_star, calc_surf_dr
315    o still need to deal with ini_masks_etc
316    o testreport seemed happy
317    checkpoint57y_pre
318    
319    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
320    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
321    o add new offset feature to offline pkg (plus minor cleanup)
322    o cfc fixes for final year of integration
323    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
324      be in GCHEM_OPTIONS).
325    
326    checkpoint57x_post
327    o fix testreport Pb in multiple test experiment.
328    o cleanup our namelist syntax in verification:
329      - make it more F95 standards compliant (some work still needed)
330      - allows the vast majority of our tests to work with gfortran
331    o Non-Hydrostatic:
332     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
333     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
334    o Allow to apply AB on T,S rather than on AB(gT,gS):
335     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
336     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
337       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
338     - need a "clever" read_pickup to restart from the other AB formulation
339    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
340    o remove some unused variables (reduces number of compiler warnings)
341    o adjoint
342      * Disable useVariableViscosity for adjoint for time being
343        (there are a number of extensive recomputations)
344      * Initialize certain variables needed for adjoint
345    
346    checkpoint57w_post
347    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
348                 fix the singleCpuIO RS version of MDSWRITEFIELD
349       and add a WARNING if using globalFiles=T with multi-processors.
350    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
351      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
352    o tracer advection scheme:
353      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
354       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
355       was not very convenient).
356      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
357       (further tests needed for the implicit DST & Flux-Limiter schemes).
358    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
359      and sRef for convenience, handy, when you want to initialize
360      ptracers in a large domain with a constant non-zero value. Also,
361      untangle ptracers_init.F a little.
362    
363    checkpoint57v_post
364    o change dome exp. to use variable viscosity in side-drag terms.
365    o remove all the files from the cfc_offline test since they are now
366      incorporated into tutorial_cfc_offline which has been producing
367      identical results for a few days of testing
368    o add new parameter: sideDragFactor to enable half-slip-side BC
369      and change side-drag S/R to use viscosity from mom_calc_visc
370      (can switch back by setting sideDragFactor=0.); affects results at
371      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
372       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
373    o vorticity & strain are now computed without masking, to account for
374      no-slip-side BC in variable viscosity calculation ; mask is applied
375      anyway later on, before computing advection/coriolis terms.
376    o modify exp4 to test new obcs support for reading from external files
377      and for passive tracers
378    o fix behavior of ptracers_monitor when monitor output is written to a
379      netcdf-file; still not independent of monitor.F (writes in the same
380      file).
381    o change default value of tRef (put a uniform, meaningful value for ocean
382      & atmos) and initialize sRef (was missing, as Martin mentioned).
383    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
384      to be proportional to enstrophy dissipation length.  Thus,
385       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
386      This is now consistent with Smagorinsky and with the manual.
387    
388    checkpoint57u_post
389    o OBCS and PTRACERS: add open boundary support for passive tracers
390      - either use homogenous (pseudo) v.Neumann conditions or prescribe
391        OB-values from file; this is not different from the way theta and salinity
392        are treated
393      - however, Orlanski-radiation conditions are not supported, and the model
394        will stop if you use pTracers and Orlanski at the same time.
395      - beefed up the rountine obcs_external_fields_load: now only those open
396        boundary values are overwritten with values from files for which there
397        are really files, otherwise the OB-fields remain untouched. This makes
398        it possible to use different OBs at different ends of the domain (as
399        with EXF)
400    o reduce number of exch calls in shap_filt (s2).
401    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
402      truncation level) 4/5 MLAdjust test results (11&12 digits match).
403    
404    checkpoint57t_post
405    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
406    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
407      same truncation, independent of the face number: affects affects several
408      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
409    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
410      note that biharmonic viscosity + no-slip was not tested in any experiment.
411    o fix bug in non-linear free-surf side-drag ; generate new output for
412      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
413    o make mnc honor the writeBinaryPrec flag for most kinds of output
414    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
415    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
416      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
417    o add brackets in multi-terms sum to get same truncation, independent of
418      the face number (manage to get exactly same value of gU,gV at the cs-edge)
419      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
420    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
421      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
422      a maximum grid-scale Reynolds number.  Also, changes all length calculations
423      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
424      Suggested values of viscosity parameters found in mom_calc_visc.
425      Many new viscosity diagnostics available.
426    
427    checkpoint57s_post
428    o Add clearing-house for viscosity calculations, mom_calc_visc and
429      correct numerous bugs in LeithD and Smagorinsky discretizations.  
430      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
431      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
432      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
433      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
434      The Strain-Tension form is now called with useStrainTensonVisc=.true.
435      ViscAhStrain and viscAhTension are now retired.
436    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
437    o In response to JMC's bug report, genmake2 now ignores any soft-links
438      that it finds in the *current* directory when searching for files.
439      Soft-links found in any other source directories will still work as
440      they did before.
441    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
442      a C routine to unlimit the stack size
443    o mnc-ify pkg/aim snapshot vars
444    o mnc-ify pkg/land as requested by Daniel
445    o various changes to mnc including:
446      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
447      - output can now be grouped so that all files within a group
448          change the ITER portion of their names in lock-step together
449      - can now read ("global") PER-FACE (in addition to PER-TILE) files
450          and works with both EXCH1 and EXCH2 (but needs more testing)
451      - writing works for all verification test cases w/ g77 on Linux
452    
453    checkpoint57r_post
454    o make MNC variable initialization happen earlier
455    o add diagnostics for (almost) each term of the momentum Eq.
456    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
457    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
458    o remove MINIMAL_TAVE_OUTPUT option ;
459      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
460    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
461      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
462    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
463    o add time-dependent SST, SSS control
464    o cost terms in ecco/ modularized (new cost_generic.F)
465    o cost_averages routines are modularized (new cost_averagesgeneric.F)
466    o new infrastructure for seaice model vs. obs misfits in seaice/
467      * driver from the_main_loop.F is seaice_cost_driver.F
468      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
469      * gradient check in Exp. 6a of natl_box_adjoint/
470    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
471      (see README file)
472    
473    checkpoint57q_post
474    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
475    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
476      - bug was reported by Jean-Michel and Ian Fenty
477    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
478      update exp. cpl_aim+ocn output.
479    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
480      Needed for high-res. runs with large global files
481      to be able to limit tapelev size
482    o Changed some tests for adjoint:
483      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
484      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
485      * global_ocean.90x40x15/ back to default 3-level checkpointing
486    o Modifications to enable scripted COMMON to MODULE conversion
487      * verification/OpenAD/code/ has necessary scripts and description;
488      * converts, compiles and runs successfully;
489    
490    checkpoint57p_post
491    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
492    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
493      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
494    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
495    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
496      (was already the case for dissipation with mom_vecinv,
497       and also the case for grad.PhiHyd when staggered-timeStep)
498      This will allow to put dissipation out-off the AB time-stepping.
499     Unfortunately, affects truncation error. Update output of exp. that "fails"
500      (cg2d matching number) and leave the others for later: front_relax(10),
501      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
502      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
503    
504    checkpoint57o_post
505    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
506      (2) its ready to be documented during the 20050801 DocFest
507    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
508      for ideal_2D_oce and lab_sea on linux_ia32_g77
509    o set to #undef CTRL_SET_OLD_MAXCVARS_30
510      in global1x1_tot/code_seaice_adj to access indices 32, 33
511      (worth another tag)
512    
513    checkpoint57n_post
514    o adding precip control xx_precip 32
515    o adding swflux control xx_swflux 33
516    o Replacing 10 forcing penalty cost routines by 1 generic.
517    o Implementing partitioning in time-mean and variable adjustment
518      for atmos. state.
519    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
520    o in natl_box_adjoint:
521      * updated exp 1 to 10
522        (but does not have time-mean vs. variable split results yet)
523    o updated global1x1/*_seaice_adj/
524      to incorporate latest changes
525    o enable useSingleCpuIO for mdsio vector routines
526      (applies in particular to tapelev I/O)
527    o removed inefficient K-loop in all active_file*control*.F
528    
529    checkpoint57m_post
530    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
531      and advect_cs (use EXCH-2 and standard cs-32 grid files).
532    o pkg/exch2: filling of face-corner halo regions is optional
533      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
534    
535    checkpoint57l_post
536     tag before updating tutorials (pre-release-2)
537    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
538       for output and interpolation of input fields onto model grid)
539    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
540       Affects results of exp. rotating_tank ; update output.txt.
541    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
542          and taking the square quantity and/or using a fraction-weight field.
543    o fix aim_diagnostics_init.F mate numbers.
544    o add mnc output capability to diagnostics/diagstat and update
545      our cvsignore files for the ACSII output generated
546    
547    checkpoint57k_post
548    o lab_sea now uses diagnostics package and provides a suite of
549      new EXF diagnostics output.
550    
551    checkpoint57j_post
552    o exf
553      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
554        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
555        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
556      * extended diagnostics output
557        - now includes all EXF variables
558        - hs, hl moved to common block
559        - separate S/R for diagnostics, called after ctrl vector is added
560        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
561        - EXFqnet contains true Qnet (i.e. includes qsw)
562      * updated verif. lab_sea, global_with_exf
563      * Rearranging hflux (exf_mapfields -> exf_getforcing)
564        to ensure that diagnostics sees a true EXFqnet
565    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
566    o diagnostics pkg: change pointers so that 1 diagnostic can be used
567      several times with different frequencies.
568    o mnc-ify the thsice package as requested by Daniel Enderton
569      - the monitor--MNC output needs work
570      - many attributes need to be added (most are currently blank)
571    o mnc-ify theaim_v23 package as requested by Daniel Enderton
572      - many attributes need to be added (most are currently blank)
573    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
574    o add Sadourny like discretization to the 4th.O vorticity advection scheme
575    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
576      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
577         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
578    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
579     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
580    
581    checkpoint57i_post
582    o Diagnostics package was changed: diagnostic allocation is now deactivated
583      by setting an empty file name in the namelist (used to be by setting 0 frequency)
584    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
585      add 1rst Order upwind vertical Shear.
586    o add a quick fix for A/B checkpointing in OFFLINE mode
587    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
588      end-run around the C/Fortran linking horror in eesup/src/timers.F
589    o added pkg/runclock: allows user to terminate run based on wall clock
590    o added non-hydrostatic scaling parameter: nh_am2
591    o pkg/my82: futile attempt to make results compiler-independent by adding
592      some "_d 0", etc. no effect.
593    o for mnc output, fill the 'T' coordinate var with myTime and create a
594      separate 'iter' variable for iteration count
595    o pkg/diagnostics:
596      add new capability: output of Global/Regional & per-level statistics ;
597      tested against monitor output (including land & thSIce) on various exp.
598    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
599    
600    checkpoint57h_done
601      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
602      data.diagnostics, data.gchem, data.ptracers) is done.
603    
604    o pkg/diagnostics: prepare for Global/Regional statistics.
605      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
606    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
607      and rename it: DIFFERENT_MULTIPLE
608    
609    checkpoint57h_post
610    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
611    o pkg/diagnostics: change output frequency, now in seconds (instead
612      of Nb of iterations). This requires to change data.diagnostics.
613    checkpoint57h_pre
614    
615    o in mnc, let the user create the output dir if both mnc_outdir_date
616      and mnc_outdir_num are false
617    o add fflags() to pkg/diagnostics which allows one to specify, on a
618      per-file basis, the file precision [default behavior is unchanged]
619    o added diagnostics to pkg/kpp, including computation of mixed layer
620      depth based on a temperature/density criterion
621    o updated verification/natl_box to test the new pkg/kpp diagnostics
622    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
623    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
624    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
625      not mnc -- this mistake was found by JMC and is now corrected
626    
627    checkpoint57g_post
628    o add Adams-Bashforth 3rd Order time stepping:
629      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
630      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
631    checkpoint57g_pre
632    
633    o make lambda[Theta,Salt]ClimRelax spatially varying
634      (default remains spatially uniform constant based on tau)
635    o added new control variables
636      * init. uVel, vVel, etanN
637      * lambda[Theta,Salt]ClimRelax
638    o separate masks used for ctrl_pack/unpack 'from write_grid' output
639      (suggested by G. Forget)
640    
641    checkpoint57f_post
642    o add parameter "baseTime" = model base time = time at iteration zero
643      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
644      account for baseTime shift
645    o move Coriolis arrays from PARAMS.h to GRID.h
646    checkpoint57f_pre
647    
648    o mnc-ifying the seaice package
649    o introduced an alternative length scale calculation for use in the limiting
650      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
651    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
652    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
653      as well as grad(vort3).  Made it compatible with both approximate form
654      for the cubed sphere and full form of these gradients.  Added flag
655      useFullLeith to select between approximate and full form.  
656    o add "d0" in getcon.F to reduce differences between compilers/platforms
657      update output.txt of exp. fizhi-gridalt-hs
658    o change port_rand funtion to allow to set the seed.
659    o fix obscure MNC bug involving conversion between reals and integers
660      - it caused no problems with certain (eg. gcc, ifc) compilers but the
661        new version is now more standards-compliant
662    o adjoint-related modifications
663      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
664      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
665      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
666    
667    checkpoint57e_post
668    o Adding eddy stress controls a la Ferreira et al.
669    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
670    
671    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
672      update output.txt of exp. fizhi-gridalt-hs
673    o add more "Z" dimensions and associated coordinate vars to MNC
674    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
675    o parameter calendarDumps: when set, approximate months (30-31 days) and years
676      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
677      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
678      months and years.  Requires pkg/cal.
679    o diagnostics: add pickup functionality
680      - off by default for backwards compatibility
681      - current version only uses MDSIO -- MNC will be added
682    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
683    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
684    
685    checkpoint57d_post
686    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
687    o modify verification/ideal_2D_oce so that it tests the creation of mnc
688      output from the diagnostics package
689    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
690    o make genmake2 more portable by using ".$FS" instead of ".f" for more
691      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
692    o add coordinate variables to the MNC output from the diagnostics package
693    o change MNC-flags default value: true when useMNC=TRUE
694    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
695      the ability (off by default) to read the grid information using MNC
696    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
697    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
698    o do snap-shot diagnostics at the middle of the time-interval (instead of
699      at the end).
700    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
701      new test for AIM with thSIce + slab-ocean
702    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
703    o move state variable diagnostics to the beginning of the time step ;
704      (note: still needs some work specially for snap-shot diagnostics)
705      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
706    
707    checkpoint57c_post
708    o Change testing option (-ieee) to get closer agreement between g77 & ifort
709    o generate new output.txt files on faulks with g77 & the new -ieee option
710    checkpoint57c_pre
711    
712    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
713      update output.txt of exp. global_ocean.90x40x15
714    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
715      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
716    o add saltFlux(+File) forcing capability with periodicExternalForcing
717    o allow to use pkg diagnostics for GM-Redi & ThSIce output
718    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
719    o improvements for the MNC output from DIAGNOSTICS:
720      - correct handling of the unlimitied dimension
721      - all dims now have associated coordinate variables
722      - variables located at U, V, and Corner ("Z") points are now written
723        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
724        *all* data points are output
725    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
726    o added pkg/seaice/seaice_monitor.F
727    o mdsio_readfield.F can now read files visible only to master MPI process.
728    o pkg/seaice: some test code for ice-modified ocean stress
729    o exf_getffields interpolation defaults to bilinear for all scalar forcing
730      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
731      spurious negative numbers for precipitation and humidity.  Will cause
732      some small numerical differences for integrations using pkg/exf/exf_interp.F.
733    o pkg/ctrl/
734      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
735        May be enabled via doPackDiag
736      *  introduce z-scaling of
737         + gradient (doZscalePack) and
738         + control (doZscaleUnpack)
739    o pkg/mdsio/
740      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
741      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
742    
743    checkpoint57b_post
744    o simplify options in diagnostics_fill arguments (remove weird combinations)
745    o fix MNC coordinate variables so that they now contain per-face index
746      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
747      general, EXCH2 grids are only aligned to a "local" coordinate system
748    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
749    o Implement instantaneous output within pkg diagnostics:
750      setting a negative frequency in data.diagnostics produces
751     "snap-shot" output (as opposed to time-average if freq > 0)
752    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
753      NOTE: change ptracer diagnostics name: use 2 characters to work with
754            more than 9 tracers. Add also diagnostics of advect & diffus flux.
755    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
756      becomes the coordinate variable for the 'T' dimension
757    o add CF-style coordinate variables to MNC
758      - just a first cut:  numbers are meaningless on the cubesphere and
759        missing along the T axis but otherwise it works!
760    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
761    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
762    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
763      this is based directly on what the model compute, so that the content of
764      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
765    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
766    o clean up build options files for SunOS, in particular
767      - remove -traditional from xmakedepend
768      - change -xarch=v9 to -xarch=native for f77
769      - restore use of make (not gmake)
770      - add CC=gcc if using g77
771    o changes per discussion of AM, JMC, & EH3 today:
772      - move redundant "grid" variables out of "state" -- in preparation of
773        creating proper CF-style coordinate variables and in recognition
774        that any/all grid variables can be easily copied (eg. w/NCO) from
775        the grid files into any of the other NetCDF files
776      - *always* output grid variables with MDSIO (this will eventually be
777        changed)
778      - output MNC grid file if useMNC is true
779    o every instance of _END_MASTER() has been found and replaced with
780      _END_MASTER( myThid ) in order to satisfy certain picky Sun
781      preprocessors
782    o re-arrange diagnostics pkg initialisation:
783     - allow each package to extend the available diagnostics list
784     - add some checking and fix small problems (multi-threaded, ...)
785     - new S/R diagnostics_fill (replace fill_diagnostics):
786       look through the short list of active diag. (instead of the long list)
787       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
788    
789    checkpoint57a_post
790    o this set of changes restores TAMC compatibility
791      tested for global_ocean.90x40x15 adjoint on trough
792      (what a pain)
793    
794    checkpoint57a_pre
795    o some modifs in tools/build_options for sunos
796    o call ctrl_pack for ctrl at end for optimcycle=0
797    
798    checkpoint57
799    o add horizontal bi-harmonic viscosity for vertical velocity
800      - new parameter viscA4W (defaults to viscA4)
801      - affects only non-hydrostatic code
802      - to be done: no-slip lateral boundary conditions
803    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
804    o implement Implicit Vertical advection for pTracers
805    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
806      (implemented also for implicit vertical diffusion & advection)
807    o OBCS: extend application of tracer open boundary conditions
808      to a strip beyond the boundary of width Olx/Oly
809    o add call monitor to TAF set of required calls (flow directives)
810      and include in natl_box_adjoint
811    o untangle a few ifdefs related to cost, ctrl, autodiff
812      untangel a few ALLOW_ECCO_OPTIMIZATION
813    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
814      (theta2, salt2 in ecco_cost_weights)
815    
816    checkpoint56c_post
817    o OBCS as control variables
818      - update ctrl_ad_diff.list, obcs_ad_diff.list
819      - remove balance of obcs controls from default
820      - fix index bug nobcs in ctrl_init
821      - fix dummy fields filen in ctrl_pack
822      - add dummy weights for obcs
823    o lsopt: comment out fort.94 output
824    o optim:
825      - remove unnecessary header files
826      - adjusted namelists
827      - add xerbla.F to Makefile
828    o exf:
829      - multiple modifications of exf_check_range
830      - unit change in exf_init_runoff from [m/year] to [m/s]
831    o mdsio:
832      - i/o-vector change debugLevel from debLevA to debLevB
833    
834    checkpoint56b_post
835    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
836      is called from DO_THE_MODEL_IO
837      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
838      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
839      - clean up PTRACERS_WRITE_TIMEAVE a little
840    o add another verification experiment that tests both the cfc-pkg and
841      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
842      reactive tendencies treated inline with regular timestepping
843    o testreport previously did a lousy job of comparing small numbers, so
844      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
845      implemented in the little c-progam tmp_cmpnum.c which is embedded in
846      testreport.
847    o ptracers_monitor: bug fix for MPI
848    
849    checkpoint56a_post
850    o GCHEM: finish reorganizating the package
851      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
852        (introduces another 3D-array for each passive tracer, but only if
853        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
854        gchemTendency is not needed because the timestep is done separately)
855      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
856      - GCHEM is now---more or less cleanly---separate from PTRACERS
857      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
858        so clear to me how that should be done in a general way.
859    o CFC: improve formatting of output in CFC_ATMOS
860    o PTRACERS:
861      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
862        that ALL experiments with ptracers enable can be checked. This makes
863        GCHEM_MONITOR obsolete.
864      - include a runtime parameter PTRACERS_monitorFreq that defaults to
865        monitorFreq
866      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
867    o add PTRACERS (PTR0[1-5]) to testreport output
868    o exf_check_range:
869      * default changed to .TRUE.
870      * will check values for niter0 if debLevA, every timestep if debLevB
871      * STOP in exf_check_range if 'out of range'
872      * range chosen generous to allow for potential extema
873      TBD: a version with stricter range
874           permitted range would be runtime parameters
875    o GMredi:
876      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
877      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
878      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
879    o GCHEM:
880      - move call to GCHEM_FORCING_SEP, so that it is now called before
881        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
882      - introduced a useGCHEM runtime flag and applied it everywhere.
883      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
884        this flag is now only visible within GCHEM-pkg routines.
885      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
886        be replaced by a 3D array that is computed before thermodynamics; for
887        this, the tracer ID iTracer had to be included into the parameter list
888        of ptracers_forcing
889      - set up forward_step to call gchem_forcing, that will replace
890        gchem_forcing_int in ptracers_forcing
891      - cleaning up
892    o small cleaning of exch2: remove files that are also in eesupp/src
893    
894    checkpoint56
895    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
896    o mnc: cleanup "full" files--fixes out-of-memory problem
897    o ECCO-GODAE
898      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
899      * fully merged and updated from SIO code
900        windstress sign change affects
901        - exf_inscal_[u/v]stress
902        - sign of xx_tau[u/v] adjustments
903        - signs in cost_scat
904      * ctrl_get_gen: avoid update of tau[u/v] for first few days
905      * natl_box_adjoint updated and compressed
906      * 2-level checkpoint switch added
907        (tested in EXP. 1 of natl_box_adjoint)
908      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
909    o SVD
910      * first complete, non-hacked version for SVD calculations
911      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
912        performed via direct access files admtlm_vector.it????
913        (via ctrl_[un]pack)
914      * optimcycle is used for ARPACK iteration counter
915        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
916      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
917        and add linear transforms where necessary
918      * controls are initial/final SST, SSS (can be extended; need to check
919        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
920    o mdsio: filename info to both stderr, stdout
921    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
922      from sign change
923    
924    checkpoint55j_post
925    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
926      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
927    o add consistent build directories and .cvsignore files to verification
928    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
929    o make all subroutines 30 or less characters in length for certain older
930      compilers to work (a thorough search only turns up two routines in
931      pkg/ptracers)
932    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
933      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
934    
935    checkpoint55i_post
936    o change arrays for total vertical diffusivity (2.D if explicit,
937      3.D if implicit) ; each ptracer uses its own background value.
938    o added mnc/NetCDF output capability to ocn_compon_interf
939      - added bits to verification/cpl_aim+ocn so that it can run on
940        ITRDA and other clusters without the mpirun "-wd" option
941    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
942      configuration
943    o give MNC the ability to create additional files rather than
944      exceeding a specified file size limit "MNC_MAX_FILESIZE"
945      - the default is just less than 2GB which is a practical limit
946        on many systems
947    o Compute the non-local term using either KPP vertical diffusivity (=default)
948       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
949    
950    checkpoint55h_post
951    o add verification test "vermix"
952    o remove all the *_ioinc flags and replace with the single global
953      outputTypesInclusive flag
954    o allow to set a vertical profile of vertical diffusivity for T & S
955    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
956    o useMNC moved from data.mnc to data.pkg
957    
958    checkpoint55g_post
959    o Renaming carbon AD experiments to comply with testreport conventions
960    o Updating adjoint of Held-Suarez hs94.1x64x5
961    o Fixing directives for non-ECCO forward_step, after ECCO directives
962      have been fixed to avoid recomp. of do_oceanic_phys
963      Works well for global_ocean.90x40x15,
964      but recomp. issue remains for carbon
965    o Updating adjoint output for natl_box_adjoint after
966      pkg/ecco has been modified (see taga c55d_post)
967    
968    checkpoint55f_post
969    o rename to timeave_init_fixed
970    
971    checkpoint55e_post
972    o some delicate re-shuffle of store directives to avoid one
973      extra call of do_oceanic_physics
974      affects ecco_the_main_loop.F, do_oceanic_physics.F
975      checkpoint_lev1_directives.h
976    o NB: this may break global_ocean adjoint temporarily,
977      but it is clear how to fix it. Will do later, need this now.
978    
979    checkpoint55d_post
980    o ECCO specific cost function terms (up-to-date with 1x1 runs)
981    o ecco_cost_weights is modified to 1x1 runs
982    o modifs to allow observations to be read in as
983      single file or yearly files
984    o enable to read exf forcing fields as either
985      single file or yearly files (flag useExfYearlyFields)
986    checkpoint55d_pre
987    
988    o switch between 2-level and 3-level checkpointing
989    o add ability of MNC to write local and "partial" (eg. 2D slices where
990      the full 3D field is never actually stored) arrays to NetCDF files
991      with the correct (that is, the complete multi-dimensional) set of
992      array indicies
993      - used in mom_vecinv() to write the diagFreq output
994      - tested (demonstrated) in verification/aim.5l_cs
995    o further mnc-ification
996      - add verification/lab_sea to the list with mnc setups
997      - fix undefined mnc v-names in cd_code
998      - add kpp to mnc output (both snapshot and timeave)
999    o non-hydrostatic code
1000      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1001        in calc_gw.F
1002      - defaults to viscAh
1003      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1004        friction or Leith) in non-hydrostatic mode, as long as there is
1005        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1006    o pkg/cost
1007      extend simple cost functions to treat time mean quantities
1008      (T,U,V) via cost_accumulate_state from cost_tile
1009    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1010        be 2 times larger than the minimum size the advection scheme requires.
1011        now get a perfect conservation of salt in advect_cs test-exp (updated)
1012    o GGL90 (Gaspar's TKE mixed layer)
1013      - add horizontal diffusion of TKE, requires exchanges in
1014        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1015        default. In OPA there is no horizontal diffusion of TKE but the
1016        mixing coefficients are computed from a horizontal average of TKE of
1017        6 points or so. I think that diffusion has a little more physical
1018        justification.
1019      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1020        was in vain)
1021      - mask tke-variable in ggl90_init
1022    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1023    o fix biharmonic diffusion on CS-grid.
1024    o more obcs stuff
1025      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1026        for reading boundary values. This routine is called from
1027        obcs_prescribe_read
1028      - updated obcs_check
1029      - changed sponge layer relaxation parameter units for days to seconds
1030      - turned off sponge layer by default
1031      - changed argument list of OBCS_CALC to myTime+deltaTclock
1032      - fixed about 35 bugs in obcs_external_fields_load
1033    
1034    checkpoint55c_post
1035    o obcs stuff
1036      - new runtime flags useOBCSprescribe, useOBCSbalance
1037      - re-arranged obcs_calc
1038      - moved exf_getobcs to obcs_prescibe_read
1039        obcs_prescibe_read is called after ORLANSKI stuff
1040        and independent of it (executable can contain all).
1041      - updated obcs_check
1042      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1043        These may be necessary only if tangential velocities are
1044        prescribed at OB, not sure, needs testing.
1045    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1046      which simplifies the calls and passes the ifc check-bounds test
1047    
1048    checkpoint55b_post
1049    o add a 2D scalar, Z location, exchange_2 routine.
1050    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1051      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1052      affects advect_cs results (for the wrong reason): update output.txt
1053    o use a more standard discretization for biharmonic viscosity ;
1054     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1055      affects results of dome set-up: update output.txt
1056    o fix gad_advection.F (CubedSphere part), back to version 1.23
1057    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1058    
1059    checkpoint55a_post
1060    o merged code to
1061      * prescribe/read time-dependent open boundaries
1062        (works in conjunction with exf, cal)
1063      * sponge layer code for open boundaries
1064      * each boundary N/S/E/W now has its own CPP option
1065        (healthy for the adjoint)
1066    
1067    checkpoint55
1068    o up-to-date adjoint of previous breaks
1069      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1070      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1071      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1072      - carbon: * remove tr1-related adjoint verification
1073                * add ptracer as control variable
1074    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1075      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1076    
1077    checkpoint54f_post
1078    o in verification/carbin/ remove experiment related to
1079      ALLOW_PASSIVE_TRACER (array tr1 etc)
1080      code_ad/ input_ad/ results_ad
1081    
1082    o add two new packages
1083      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1084        + subject to optimization (memory)
1085      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1086        + subject to reordering (many GOTOs in the original code)
1087        + so far opps is called for every (i,j) point, and then operates in
1088          the vertical; one may want to reorder the scheme in order operate in
1089          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1090          fields)
1091    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1092      - all verification tests compile and run with linux_ia32_g77
1093      - defaults are compatible with current input files--nothing
1094        should change if you were not previously using MNC
1095      - MNC output has been added in numerous places (eg. timeave)
1096        but there are still a few writes not yet do-able with MNC
1097        (this is in progress)
1098      - flags now allow for either/or/both use of MDSIO and MNC and
1099        documentation will soon follow
1100      - numerous small formatting cleanups for ProTeX
1101    o add version info (via BUILD_INFO.h) to MNC and stdout
1102    
1103    checkpoint54e_post
1104    o add two new packages
1105      - pp81 (Packanowski and Philander, 1981), Richardson number and
1106        stratification dependent mixing
1107      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1108      - these scheme operate in a similar manner as KPP (without ghat, of
1109        course), however there is only one diffusivity that is used for both
1110        temperature and salinity (and passive tracers)ç
1111    o add offline package
1112    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1113      provided by Stephanie Dutkiewicz
1114    o genmake2: add ability to search for C compilers and cleanup test output
1115      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1116    
1117    checkpoint54d_post
1118    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1119    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1120      leading to additional shift by 5 days each year of integration
1121       (i.e. leading to considerable offset over the years)
1122    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1123    o start with no AB and no initial filtering (staggerTimeStep):
1124      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1125    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1126      (external loading & cpl import/export stay in forward_step.F)
1127    o update coupling interface to work with new staggerTimeStep
1128    o change MDSIO ptracers_pickup.
1129    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1130    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1131    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1132    
1133    checkpoint54c_post
1134    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1135      this affects (truncation error) output.txt of test-exp:
1136       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1137    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1138    o change Qnet to always be the net heat flux, (+upward).
1139      affects (truncation error) output of natl_box exp.: updated
1140    o define the max number of passive tracers in PTRACERS_SIZE.h
1141    o start to test mnc routinely in exp0
1142    o add sea-ice loading (sIceLoad) as a new forcing field.
1143    
1144    checkpoint54b_post
1145    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1146       impressive on Altix and Opteron systems)
1147    o diagnostics can now write NetCDF files through the mnc package
1148    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1149    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1150    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1151      affects (truncation error) output of lab_sea & natl_box exp.: updated
1152    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1153    
1154    checkpoint54a_post
1155    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1156    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1157    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1158    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1159      + internal_wave (shift in writing cg2d_ini_res)
1160    checkpoint54a_pre
1161    
1162    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1163      - modified verification/lab_sea and natl_box_adjoint accordingly
1164    
1165    checkpoint54
1166    checkpoint53g_post
1167    o prepare splitting of thermodynamics: store convect.counter in common block
1168    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1169      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1170    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1171    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1172    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1173    o restore adjointability
1174    
1175    checkpoint53f_post
1176    o modifications that affect AIM experiment results (update output.txt):
1177      - no advection of S at top interface Nr (pkg/generic_advdiff)
1178      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1179    o AIM pkg:
1180      - include stability function into surf.Flux derivative relative to Tsurf
1181      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1182    
1183    checkpoint53e_post
1184    o merged cylindrical coord configuration
1185    o added rotating_tank experiment
1186    checkpoint53e_pre
1187    
1188    checkpoint53d_post
1189    o faulks upgraded: re-generate output.txt that have changed:
1190       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1191    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1192    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1193    o added Sadourny discretization of Coriolis
1194      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1195      - re-enabled use of omega3 (useAbsVorticity)
1196    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1197      vector-invariant equations
1198      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1199    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1200      hopefully without new bugs
1201      - still to do: biharmonic friction for non-hydrostatic w
1202    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1203    o regenerated output for global_ocean_ebm (using -ieee)
1204    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1205      of mom_common/
1206      - simple re-arrangement of instructions within computing loop
1207    checkpoint53d_pre
1208    
1209    checkpoint53c_post
1210    o new version of coupler for AIM+thSIce and Ocean models
1211     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1212     - land: change Evaporation of snow
1213     - aim with thSIce: fix bug in snow-precip.
1214    o changes to calc_gw.F
1215     - bug fix for w^2 term near the bottom boundary
1216     - (hopefully) improve the lateral slip boundary condtions for use with
1217        partial/looped cells
1218      - because the bug fix changes two verification experiments anyway (exp5
1219        and plume on slope), change the lateral boundary condition from half slip
1220        to the value of no_slip_sides
1221    o ebm package wasnt quite up to the parallel task. Fixed that.
1222    o Adjoint of EBM package + verification
1223      * TLM OK
1224      * ADM not sufficient accuracy yet (needs further testing)
1225    
1226    checkpoint53b_post
1227    o Commiting new energy balance model to repository
1228      * package is pkg/ebm
1229      * verif. is verification/global_ocean_ebm
1230      * references are in ebm_driver.F
1231    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1232    C        Global thermohaline circulation. Part I:
1233    C        Sensitivity to atmospheric moisture transport.
1234    C        J. Climate 12(1), 71-82
1235    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1236    C        Global thermohaline circulation. Part II:
1237    C        Sensitivity with interactive transport.
1238    C        J. Climate 12(1), 83-91
1239    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1240    C        Destabilization of the thermohaline circulation
1241    C        by atmospheric eddy transports.
1242    C        J. Climate 7(12), 1870-1882
1243    o Will need long integration testing.
1244    checkpoint53b_pre
1245    
1246    o created pkg/mom_common in preparation for variable viscosity code
1247    o renamed and split ini_mnc_io
1248    o pkg/land: only liquid water can diffuse or run-off
1249    o AIM using land: soil wetness availability account for snow
1250    o added printMapIncludesZeros to EEPARMS namelist
1251    
1252    checkpoint53a_post
1253    o restore TAMC compatiility for exf_constants.h
1254      (no usage of _d in .h)
1255    o Additional storing in KPP in an attempt to fix
1256      TAMC problem with adjoint of KPP code.
1257      (no success...)
1258      Identical code works fine with TAF.
1259    o Fixed verification/natl_box_adjoint experiments.
1260      Initial conditions for Experiments 4 and 5 are now
1261      set to "SEAICE_initialHEFF=0", which is more reasonable,
1262      and hence gives results closer to that of Experiment 2.
1263      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1264    
1265    checkpoint53
1266    o stable checkpoint with up to date adjoint
1267      TLM tests only run for 1st grdchk at the moment. Its unclear if
1268      this is a code problem or a problem with resetting code for g_
1269      variables that is being autogenerated wrong.
1270      Otherwise:
1271       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1272       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1273         are both still in chaos following their security messes.
1274    
1275    checkpoint52n_post
1276    o various build (mostly genmake2) changes including:
1277      - ability to build/run more easily within Cygwin and MacOS X
1278      - more complicated Makefiles with a stronger dependence on Gnu Make
1279    o pkg/seaice modifications
1280      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1281        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1282        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1283      - changed proxy for geostrophic velocity and updated
1284        verification/lab_sea/results/* accordingly
1285      - removed ADI dynamic solver from pkg/seaice
1286      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1287        they caused a segmentation fault under certain circumstances
1288      - removed unused field WATR
1289    o bug fix in exf-package:
1290      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1291         now reflect that.
1292    o small fixes in the cal-package:
1293      - set reference date to first of January for the 'model'-calendar
1294      - failing of cal_CheckDate in cal_FullDate now actually results in a
1295        warning
1296    o small modifications in exf-package to increase flexibility:
1297      - change climtempfreeze from a constant to a runtime parameter that
1298        is specified in data.exf_clim (default = -1.9)
1299      - introduce runtime parameter windstressmax (default = 2.0) that is
1300        specified in data.exf
1301    o fix in pkg/thsice:
1302      - update Evap (Tsf changes) to be consistent with Latent heat flux
1303      - maintain snow precipitation unchanged (even if Tsf >=0).
1304     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1305    
1306    checkpoint52m_post
1307    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1308      this does not change any of the results, because myIter=0 in swfrac always
1309      lead to jwtype=2 (the default anyway), but the call makes little sense
1310      as a default
1311    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1312    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1313      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1314    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1315    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1316    o extending useSingleCpuIO option to work with new exch2 I/O format
1317      - old-style, missing-tile I/O is still accessible by defining CPP
1318        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1319    o monitor package can write to NetCDF files and/or STDOUT
1320    o fix re-definition bug in MNC_GRID_INIT_ALL()
1321    o doc/api_reference added
1322      - a framework for building an API Reference Manual using all
1323        the "protex" comments embedded in the code
1324      - see pkg/generic_advdiff, pkg/mnc for examples
1325    o MNC:
1326      - make myThid the last argument for all subroutines
1327      - new default for the grid files: NO halos
1328      - add useMNC and other run-time flags
1329      - separate per-file-group handling of the unlimited dimension
1330      - early initialization of MNC w/ flags read at the eeboot stage
1331        and lookup tables set in initialize_fixed
1332      - write all MNC output to a freshly-created directory
1333    o thermodynamics sea-ice (thsice) is now tested with testreport.
1334    o test exp. advect_cs: use the standard cs32 grid ; update output.
1335    o Added functionality to grdchk:
1336      pick global i,j,k position (or nearest wet) where to perform check.
1337    
1338    checkpoint52l_post
1339    o new land formulation:
1340      a) use ground enthalpy as prognostic variable to ensure exact
1341         energy conservation.
1342      b) account for water temperature and for latent heat of freezing
1343         in all processes (rain, run-off, ground storage)
1344      c) compute surface and ground temperature implicitly.
1345    o aim_v23 modification for new land model:
1346      a) Treat separately land / ocean / sea-ice surface fluxes
1347         to allow implicit computation of land & sea-ice surface temp.
1348      b) add snow precipitation.
1349    checkpoint52l_pre
1350    
1351    o fix problem (when 1 tile is empty) in min/max monitor.
1352    o fix bug in timeAve (u,vZetatave in common block)
1353    o no restoring terms under ice for pkg/seaice
1354    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1355    o bug fix for pkg/seaice pickups
1356    o change MNC call locations and add coordinate attributes
1357    o mask vorticity at the corner ; affects global_ocean.cs output
1358    o fix ini_curvilinear_grid ; test CS experiments with mpi
1359    o aim.5l_cs: modify sea-ice fraction input file ; update output
1360    o exf: Adding simple range check routine for exf fields after read
1361    
1362    checkpoint52k_post
1363    o removed top-level directory "diags"
1364      - we migrated these functions to pkg/timeave a long time ago
1365    o fixed bug introduced in pkg/monitor
1366    o accuracy ctrlprec = 32 insuffient for gradient checks using
1367      averaged fields (I/O via cost_averages)
1368      -> use ctrl.h in active_file*.F to control I/O precision.
1369    o paramter list of CALL ADTHE_MAIN_LOOP
1370    o added initial do_the_model_io to ecco
1371    o set all ...Freq to zero after cost_final
1372      taveFreq, dumpFreq, pChkptFreq
1373    o MAIN and ECCO differentiability restored
1374    
1375    checkpoint52j_post
1376    o fix nchklev in tamc.h for global_ocean...
1377    o Bringing flow and store directives up-to-date
1378    o Really weird thing!
1379      call do_the_model_io from the_main_loop with parameters
1380      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1381      TAF places a faulty re-call of initialise_varia
1382      after cost_final call which should not be there!
1383    checkpoint52j_pre
1384    
1385    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1386      error messages
1387    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1388    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1389      debug output
1390    o modfied mdsio_writefield.F to handle non-global files under exch2
1391    o update AIM Cubed-Sphere exp (aim.5l_cs):
1392      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1393    o update AIM Equatorial Channel exp:
1394      use standard aim_v23 pkg and change the SST fields to be more realistic.
1395    o globalFile now works with exch2
1396    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1397      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1398    o limit timeave output for hi-res integrations
1399    
1400    checkpoint52i_post
1401    o removed CPP_EEOPTIONS.h from verification/*/code
1402    o updated the tiling for global_ocean_pressure
1403    checkpoint52i_pre
1404    
1405    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1406      the old pkg/aim).
1407    
1408    checkpoint52h_pre
1409    o shortened offending lines in exch2_send_rx?.template
1410    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1411    o genmake2: add build & execute test for NetCDF code
1412    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1413      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1414    o added useSingleCPUIO flag to monitor.F and mon_out.F
1415    o added temporary hack for sea-ice dynamics on the cube:
1416      metric terms are ignored and it is assumed that
1417      there is no sea-ice on cube faces 1, 2, 4, and 5.
1418    
1419    checkpoint52f_post
1420    o added exch2 cube routines to pkg/exch2
1421    o modified hs94.cs-32x32x5 to use it
1422    o added new grid files to hs94.cs-32x32x5
1423    checkpoint52f_pre
1424    
1425    checkpoint52e_post
1426    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1427      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1428    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1429      to work with implicit vertical advection and AB ;
1430    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1431    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1432     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1433    checkpoint52e_pre
1434    
1435    o fix bug in impldiff when Nr=1 or Nr=2.
1436    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1437    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1438    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1439      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1440    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1441    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1442    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1443    
1444    checkpoint52d_post
1445    o re-tiled many expts to allow comparison in multi-processor mode
1446      - updated output accordingly
1447      - changed hs94.128x64x5 to use intial T from file rather than use the
1448        random number generator
1449    o add infrastructure in model routines for fizhi and gridalt packages
1450    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1451    o changes to permit hi-res, cubed-sphere, configuration
1452      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1453      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1454      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1455        of surface winds for the cube
1456      (A verification experiment, based on global_ocean.cs32x15, but with
1457       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1458       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1459       complete with example surface forcing files and matlab scripts to look
1460       at the output and compare it with that of global_ocean.cs32x15.)
1461    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1462       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1463       to conform to the common rule.
1464    o check-in the first version of the coupler + interfaces for multi-components
1465       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1466       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1467       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1468       - ocean and atmos. share the same horizontal grid (no interpolation).
1469       - exchanges between component and coupler is done in forward_step
1470    o new verification experiment, cpl_aim+ocn:
1471       coupled ocean - AIM atmosphere on cs32 grid.
1472    
1473    checkpoint52d_pre
1474    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1475    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1476    
1477    checkpoint52c_post
1478    o Fixing OPTIONS files for use of exf:
1479      - ALLOW_ECCO not needed
1480      - ECCO_CPPOPTIONS.h should not be included from
1481        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1482        as has been the case in the past
1483      - All cal/exf related options are currently set in
1484        single header file. Should remain so until we
1485        agree on a consistent new policy.
1486    o Removed all CPP options for cal package.
1487      cal has no more CPP options.
1488    o modified STOREs in GAD_ADVECTION
1489    o corrected key comp. for passkey
1490    
1491    checkpoint52b_post
1492    o new version: "thsice" of thermodynamic sea-ice pkg:
1493     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1494     - modify fluxes but do not change theta directly;
1495     - light cleaning of bulk_force pkg (still needed with thsice).
1496     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1497       + output_thsice.txt to test thsice & bulk_force pkgs.
1498    o put back grid & coriolis monitor output.
1499    checkpoint52b_pre
1500    
1501    o call "do_the_model_io" at the beginning (=> dump initial state)
1502    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1503    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1504      (need info on NUMBER_OF_PTRACERS)
1505    o missing PTRACERS headers in some routines
1506    o default tamc.h in pkg/autodiff supposed to crash
1507      to ensure proper customization
1508    
1509    checkpoint52a_post
1510    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1511      - moved surfaceTendencyTice from pkg/seaice to main code
1512      - subroutine FREEZE_SURFACE now limits only surface temperature
1513        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1514        => new output.txt for global_ocean.cs32x15 & global_with_exf
1515      - keep the old version of FREEZE for backward compatibility;
1516        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1517      - corresponding modifs for TAF directives
1518    o added surface flux output variables to TIMEAVE_STATVARS
1519    o time-averaged output for pkg/ptracers
1520    o fix problem with ECCO-related divided adjoint
1521      snapshot file was missing some ad-variables,
1522      but no warning issued by TAF
1523    
1524    checkpoint52a_pre
1525    o some bug fixes for #undef REAL4_IS_SLOW
1526    
1527    checkpoint52 = ecco_c52_e35
1528    o after testing adjoints of checkpoint51u_post
1529    
1530    checkpoint51u_post
1531    o this is the post-merge tag of the ecco-branch
1532      (needs another clean checkout and re-testing)
1533    o various natl_box_adjoint configs and results
1534      but no input fields
1535    o obcs adjoint not yet merged!
1536    o adding ECCO global 1x1 and 2x2 degree configs
1537    o updated/extended some store directives for seaice
1538    o pkg/ecco now containes ecco-specific part of cost function
1539    o top level routines the_main_loop, forward_step
1540      supersede those in model/src/
1541      previous input data.cost now in data.ecco
1542      (new namelist ecco_cost_nml)
1543    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1544    
1545    checkpoint51t_post
1546    o this is the pre-merge tag of the ecco-branch
1547    
1548    checkpoint51s_post
1549    o cleanup: removed various obsolete #define-s
1550    o pkg/grdchk
1551      - renamed 'ph-grd 3' to 'grad-res'
1552      - merged from ecco-branch
1553        (remaining bug fixes for obcs gradient checks)
1554      - additional high-precision output for testreport
1555        (grep for 'precision_grdchk_result')
1556    
1557    checkpoint51r_post
1558    o cleaned up or removed CPP_OPTIONS.h files
1559    o updated results for some of the tests to reflect the new
1560      optfiles (-ieee: -O0 instead of -O3)
1561    
1562    checkpoint51q_post
1563    o cd_code:
1564      - moved cd_scheme.F -> cd_code_scheme.F
1565      - separate read_checkpoint from cd_code_ini_vars.F
1566      - separated cd_code part from write_checkpoint
1567      - updated AD_SOURCE, generated .flow
1568      - added CD_CODE_VARS.h to the_main_loop
1569      - Moving cd_code specific store dir.s to pkg/cd_code
1570    o ctrl package totally restructured
1571      - pack/unpack now optional and decoupled from
1572        xx_/adxx_ I/O
1573      - ctrl_pack/unpack cleaned
1574        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1575      - confined inclusion of AD_CONFIG.h to where necessary.
1576    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1577    
1578    checkpoint51p_post
1579    o create initial cd_code package
1580      - WARNING: the initialization of fields within packages
1581        is broken because INI_FIELDS (where READ_CHECKPOINT is
1582        called) is called *before* PACKAGES_INIT_VARIABLES.
1583        This seems to be backwards since
1584        1) its important to initially zero the entire field including
1585           the "halo" region
1586        2) zeroing needs to be done *before* reading pickup info
1587           and the pickup call might or might not happen in any
1588           particular run
1589      - this needs an overhaul for R2
1590    o cleanup verification/*/code/GMREDI_OPTIONS.h
1591    o cleanup testreport
1592    
1593    checkpoint51o_post
1594    o bringing AD-related verif's up to date with genmake2
1595      - carbon/
1596      - global_ocean.90x40x15/
1597      - hs.94.1x64x5/
1598      - (front_relax/ )
1599    o (more) consistent directory structure for AD-related verif.'s
1600    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1601    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1602    o bug fix in find_alpha.F for MDJWF:
1603      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1604        change rho -> rho-rhoConst
1605      - replace call find_rho to find_rhonum
1606    o initialisation of rFlx extended to full array (required by TAF)
1607      and shifted to thermodynamics
1608    o removed PTRACERS.h in ptracers routine
1609    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1610    o Correcting initialisations for fVerU, fVerV.
1611    o helping TAF to recognize dependency on kUp for
1612      fVerU, fVerV
1613    o Replacing delZ by delR in pkg/ctrl/
1614    checkpoint51o_pre
1615    
1616    o undid all of cp51 pending some cleanups and discussion
1617    o added the [#include "AD_CONFIG.h"] statement to all files that need
1618       it for adjoint/tl #defines
1619     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1620     o removed tools/genmake since it no longer works
1621    
1622    checkpoint51n_post
1623    o modifications to make FREEZE flux visible to pkg/kpp
1624      - moved surfaceTendencyTice from pkg/seaice to main code
1625      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1626      - subroutine FREEZE now limits only surface temperature
1627        (this means new output.txt for global_ocean.90x40x15,
1628         global_ocean.cs32x15, and global_with_exf)
1629    o added surface flux output variables to TIMEAVE_STATVARS
1630    
1631    checkpoint51n_pre
1632    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1633    o added [#include "AD_CONFIG.h"] to all files that use the following
1634      defines:
1635      - ALLOW_ADJOINT_RUN
1636      - ALLOW_TANGENTLINEAR_RUN
1637      - ALLOW_ECCO_OPTIMIZATION
1638    
1639    checkpoint51m_post
1640    o incorporating changes to get TAMC/TAF working in genmake2
1641      - added new TAMC/TAF targets to the Makefile
1642      - various cleanups related to package handling
1643      - these changes should have no impact on the forward model
1644    
1645    checkpoint51l_post
1646    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1647     - faster algorithm for cal_addtime.F
1648     - higher precision arithmetic, where needed
1649     - pkg/exf *startdate variables changed from calendar date to
1650       model integration time
1651    
1652    checkpoint51l_pre
1653    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1654    o enable to apply restoring on S & T only in a latitude band.
1655    o update output (external_forcing_surf modif. change truncation errors)
1656       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1657    
1658    checkpoint51k_post
1659    o change default to: useNHMTerms=.FALSE.
1660     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1661       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1662     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1663        exp1, ideal_2D_oce
1664     - change data file of oceanic exp (leave the results unchanged for now)
1665       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1666    o set gravitySign automatically according to the vertical coordinate used
1667      (and change sign: back to "logical" value: +1 when R increases downward)
1668    o added an include barrier to the default CPP_OPTIONS.h and
1669      removed the #include "PACKAGES_CONFIG.h" from it
1670    o fix a bug in mom_fluxform (from chk51j_post)
1671    
1672    checkpoint51j_post
1673    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1674    o adjusted some flow directives (dynamics, thermodynamics)
1675    o added cubed-sphere case to test cost function
1676    o heckpoint_lev?_directives.h now include
1677      pkg-specific directives, whenever those are enabled.
1678    o Moving pkg-specific flow directives to corresponding pkg
1679      Moving pkg-specific differentiation list to corresponding pkg
1680      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1681      ---> conventions are
1682           - pkg_ad.flow
1683           - pkg_ad_diff.list
1684           - pkg_ad_check_lev?_dir.h
1685    
1686    checkpoint51i_post
1687    o merge of the branch-genmake2
1688      - knowingly breaks the older genmake
1689      - automatic generation of all ALLOW_${PKG_NAME} defines
1690      - new testreport supersedes older testscript
1691    o large number of package inclusion and header cleanups
1692    checkpoint51i_pre
1693    
1694    o new output for adjoin of global ocean vector invariant
1695    o fix for checkpoint of thermodynamic seaice and bulk_force
1696    o Steph gchem various cleanups
1697    
1698    checkpoint 51h_pre
1699    o fixed some single quotes
1700    o modify gchem pkg to be more versatile
1701    o modifications to clean up dic pkg
1702    o add pkg/cfc
1703    
1704    checkpoint51g_post
1705    o provide links for ARPACK and ADM*TLM
1706    o start removing verification/vero/
1707    o update AD-related stuff
1708      (in particular some IF-statements in model/src/ routines)
1709    o adding to verification/global_ocean.90x40x15/ adjoint of
1710      vector invariant setup
1711    
1712    checkpoint51f_post
1713    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1714    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1715      of tracer Green's fucntions for ocean inversion project.
1716    
1717    checkpoint51f_pre
1718    o Added on-the-fly spatial interpolation capability
1719        "USE_EXF_INTERPOLATION" to pkg/exf.
1720      - This is a temporary Cartesian-grid hack until
1721        the super-duper ESMF coupler becomes available.
1722      - See verification/global_with_exf/README for usage example.
1723      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1724        flags and modified pkg/seaice accordingly.
1725    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1726        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1727        non-local transport term.
1728    
1729    checkpoint51e_post
1730    o pkg/mom_vecinv:
1731      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1732      - add time-ave diagnostic of vorticity advection.
1733    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1734    o atmospheric geopotential: - include water vapor effect;
1735                                - use p^kappa in p* scaling.
1736    o land pkg: read initial state from files.
1737    o AIM : add stratospheric drag in the upper level
1738    
1739    checkpoint51d_post
1740    o change function ILNBLNK (=> last non-blank char.) to return zero
1741      (instead of the string length) when the string. char is empty
1742    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1743    o modif's to restore TAMC compatibility
1744      - avoid "_d" constructs in PARAMETER declarations
1745      - avoid interrupting lines by comment lines
1746    o Use cluster local disks for purely local I/O
1747      vs. globally visible disks needed for ctrl stuff
1748      (merged from ecco-branch)
1749      - new active_file_loc... and mdsio_..._loc routines
1750      - affected packages: autodiff, ctrl, grdchk, mdsio
1751    
1752    checkpoint51c_post
1753    o introducing integer flag debugLevel
1754      - debLevZero: suppress all output
1755      - debLevA: standard
1756      - debLevB: equivalent to current debugMode=.TRUE.
1757    o introducing pathname variable mdsioLocalDir for mdsio
1758      that can be specified at runtime
1759      (relevant for cluster I/O to local disk)
1760    `
1761    >>>checkpoint51b_post
1762    adjoint of ptracers
1763    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1764    o extended state in checkpoint_lev?, etc.
1765    o alternative ctrl/cost with tr1 or ptracer
1766    o new comlev1_bibj_ptracers
1767    o new ptracers.flow
1768    o made ptracers_forcing same as external_forcing_s
1769    o added verification for adjoint with ptracers
1770      - adm. grdchk fail so far
1771      - tlm. grdchk OK
1772      - checked tapelev/comlev recomputations: OK
1773    <<<checkpoint51b_pre
1774    
1775    checkpoint51a_post
1776    o added code for biogeochemistry package
1777      - new pkgs: dic, gchem
1778      - new subroutine in ptracers
1779    o modify code for biogeo packages
1780      - in model/src and pkg/ptracers
1781    
1782    checkpoint51
1783    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1784      - autodiff, ctrl, exf, grdchk, seaice
1785      kept separate packages
1786      - cost, ecco, obcs
1787    o updating verification/internal_wave, verification/lab_sea
1788      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1789    
1790    checkpoint50i_post
1791    o Preparing next differentiable checkpoint and sync
1792      of MAIN vs. ecco-branch
1793      - 1st step: this one is differentiable
1794      - 2nd step: next(! not this) checkpoint will have updated packages
1795                  from ecco-branch)
1796    
1797    checkpoint50h_post
1798    o new package "land": provide surface BC for AIM.
1799    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1800    o AIM: use true log-P extrapolation for near surface temp (= as in
1801        F.Molteni paper) ; update aim.5l_cs output.
1802    o New variable in PARM03 for more flexible pickups
1803    o somewhat cleaned package initialisation sequence for
1804      ctrl/ cost/ ecco/ in packages_... routines
1805    
1806    checkpoint50g_post
1807    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1808      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1809      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1810        made the default because of faster convergence than ADI
1811    
1812    checkpoint50f_post
1813    o exf totally restructured
1814      - replaced all exf_set_ routines by one generic exf_set_gen.F
1815        and made sure it's still differentiable
1816      - split exf_getffields.F into new exf_bulkformulae.F
1817      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1818      - updated adjoint/makefile and relevant verif. accordingly
1819    
1820    checkpoint50f_pre
1821     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1822          + change Evap over land. (update aim.5l_cs output)
1823     o added missing .cvsignores and made uniform across expts
1824     o changed configuration of tidal_basin_2d expt
1825     o added pkg/debug functions for tracing code in fatal crashes
1826     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1827     o new fn in pkg/monitor to stop model if solution grows too big
1828     o removed lots of single quotes from comments
1829    
1830    checkpoint50e_post
1831    o make KPP work with PTRACERS
1832     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1833       nearly a copy of kpp_transport_s
1834     - there is no analogue to SurfaceTendencyS, so I have to use
1835       gPtr(of the surface layer) instead
1836    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1837    checkpoint50e_pre
1838    
1839    checkpoint50d_post
1840    o change kpp output from multiple-record state files to single-record state
1841      files analogous to write_state.F
1842    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1843      analogous to the cg2d-related output.
1844    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1845      so that writing to internal file fn (with length 512) fails.
1846    checkpoint50d_pre
1847    
1848    checkpoint50c_post
1849    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1850    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1851    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1852    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1853    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1854    
1855    checkpoint50c_pre
1856    Merging from release1_p13:
1857    o bug fix for pkg/seaice dynamic solver
1858    o Added SEAICE_initialHEFF to pkg/seaice
1859    
1860    checkpoint50b_post
1861    o store u*,v* in gU,V instead of in guNm1,gvNm1
1862    o in order to put the momForcing out of the Adams-Bashforth:
1863      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1864      to timestep.F
1865    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1866    o re-generate output for highly sensitive test-exp:
1867       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1868    
1869    checkpoint50b_pre
1870    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1871    o corrected CPP option mismatch in exf_Bulk... functions for case
1872      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1873    
1874    checkpoint50a_post
1875    o Bug fix for merging between c50 and KPP.
1876      ikey was passed from thermodynamics to kpp_calc via
1877      common block rather than being recomputed in kpp_calc,
1878      in contradiction with new key itdkey.
1879      New key ikppkey created, and tamc.h headers updated.
1880    
1881    checkpoint50
1882    - 2nd step of merge with ecco-branch:
1883      merge changes in ecco-branch back into main trunk
1884    - bug fix in find_alpha
1885    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1886    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1887    - merged some sliced AD support routines
1888    
1889    checkpoint49
1890    merged from ecco-branch:
1891    o exf:
1892      - Enable initialisation of forcing fields to constant
1893        (runtime) values.
1894      - in exf_getffields.F
1895        Reduce i-/j-loop to interior domain, discarding overlaps.
1896        That also fixes wrong TAF-key computations for key_1, key_2
1897        with bulf formulae.
1898      - exf_init.F modify #ifdef for exf_init_evap
1899      - exf_getffieldrec.F, ctrl_getrec.F
1900        The following INT-usages are not safe:
1901          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1902          fldcount = int(fldsecs/fldperiod) + 1
1903        and were modified.
1904    o autodiff: checkpoint_lev...
1905      - updated storing for bulk formulae (some arrays were missing)
1906      - added state for seaice package
1907      - synchronized with main branch
1908    o DIVA:
1909      Modif.s in
1910      - the_main_loop.F
1911      - the_model_main.F
1912      and added cost_final_restore.F cost_final_store.F
1913      o With these changes, it is possible to fully separate
1914        the first forward run to compute the cost function (mdthe_main_loop)
1915        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1916        into separate model executions.
1917        This enables better tuning of DIVA to given queue sizes.
1918      o Loss of cost function value in consecutive DIVA runs is
1919        fixed by storing to 'costfinal' file.
1920      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1921        beginning/end of adjoint integration is accounted for.
1922      The current changes apply to TAF-1.4.26.
1923      TAF has one remaining bug, requiring one manual change
1924      (see MITgcm manual).
1925    o cal: synchronized between MAIN and ecco-branch
1926    
1927    checkpoint48i_post
1928    o Changes to restore differentiability of code w.r.t. previous tag
1929      (mostly adding new routines to make list and replacing
1930      pressure by totPhiHyd).
1931    o Updated and merged grdchk package
1932      - has both ADM and TLM checks
1933      - works for single- and multi-proc.
1934      - output cleaned
1935      - worked successfully for parallel DIVA
1936    o genmake:
1937      - Adding -platform=SP4
1938      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1939    o Modif. for DIVA:
1940      ctrl_unpack should not be called in intermediate DIVA interval.
1941      (similar thing would apply for active files such as
1942      tbar, sbar, psbar, which should not be reinitialised;
1943      only relevant for ecco-branch)
1944    
1945    checkpoint48h_post
1946    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1947    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1948    o Added SEAICE_initialHEFF to pkg/seaice
1949    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1950    
1951    checkpoint48g_post
1952    --- EOS:
1953    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1954      store total Potential in totPhyHyd for diagnostics & EOS.
1955    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1956    --- Pressure/geopotential gradient:
1957    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1958    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1959      ( changes results of global_ocean_pressure )
1960    o NLFS + z-coord.: add eta*Rho' contribution.
1961    o accurate phiHyd when using interface-W at the middle between 2 centers
1962     ( changes results of ideal_2D_oce )
1963    o includes r* 2nd term in potential gradient.
1964    
1965    checkpoint48f_post
1966    Merging from release1_p12:
1967    o Modifications for using pkg/exf with pkg/seaice
1968      - improved description of the various forcing configurations
1969      - added basic radiation bulk formulae to pkg/exf
1970      - units/sign fix for evap computation in exf_getffields.F
1971      - updated verification/global_with_exf/results/output.txt
1972    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1973      (SBO) core products, including oceanic mass, center-of-mass,
1974      angular, and bottom pressure (see pkg/sbo/README.sbo).
1975    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1976      to avoid negative values in shallow regions.
1977      - updated verification/natl_box/results/output.txt
1978      - updated verification/lab_sea/results/output.txt
1979    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1980    o Added useSingleCpuIO option (see PARAMS.h).
1981    o Updated useSingleCpuIO option in mdsio_writefield.F to
1982      work with multi-field files, e.g., for single-file pickup.
1983    o pkg/seaice:
1984      - bug fix in growth.F: QNET for no shortwave case
1985      - added HeffFile for specifying initial sea-ice thickness
1986      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1987    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1988      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1989    o pkg/seaice:
1990      - adjoint-friendly modifications
1991      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1992    
1993    checkpoint48e_post
1994    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1995    o dynamics: change definition of computational domain & adapt mom_fluxform
1996      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1997    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1998        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1999        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2000        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2001        inverted_barometer solid-body.cs-32x32x1
2002      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2003    
2004    checkpoint48d_post
2005    o in preparation for r*:
2006     a) use pre-computed gradient of hydrostatic potential:
2007        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2008     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2009        => affects results of glob_oce_pressure (different truncation error)  
2010      update output.txt of ideal_2D_oce & global_ocean_pressure
2011    
2012    checkpoint48d_pre
2013    o in preparation for r*:
2014      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2015      pass the 2 comp. of the grad. as arguments to momentum S/R.
2016      but for the moment, only used if it does not change the results.
2017    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2018    
2019    checkpoint48c_post
2020    Modifications in treatment of initial flux forcing controls
2021    to avoid extra storing of flux fields.
2022    
2023    checkpoint48c_pre
2024    o Added tidal_basin_2d experiment (currently 1D!)
2025    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2026    
2027    checkpoint48b_post
2028    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2029     (modification to pressure gradient not yet implemented)
2030    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2031      (for U & V) that are used for vertical advection of momentum.
2032    
2033    checkpoint48a_post
2034    o In preparation for r*, use temp. array to compute vertical transport
2035       in flux-form momentum pkg. => change results of few test-exp.
2036      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2037                        lab_sea, natl_box & plume_on_slope
2038    
2039    checkpoint48
2040    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2041    
2042    checkpoint47j_post
2043    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2044    o moved adexch from forward_step to addummy_in_stepping
2045    o added exch in ctrl_map_...
2046    o aveFreq.=0. at end of cost_final to avoid overwrite in
2047      reverse checkpointing loop
2048    o Yet more changes in gmredi:
2049      * adgmredi_calc_tensor
2050        avoiding all recomputation of gmredi_slope_limit
2051      * adgmredi_x/y/rtransport
2052        added flag for excessive storing to avoid recomp. of
2053        u/v/rtans, dTdx/y/z
2054        -> this is not really necessary and very memory-consuming
2055      * adgmredi_slope_psi:
2056        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2057      * gmredi_slope_limit
2058        re-activated full calculation of taperfct for case 'ac02'
2059    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2060    
2061    checkpoint47i_post
2062    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2063    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2064      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2065    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2066    o gmredi: fix few bugs.
2067    
2068    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2069    This will be a good checkpoint to plug into the ecco-branch.
2070    o few modif.'s to get latest version adjointed
2071      (mainly kick out code in ini_linear_phisurf)
2072    o modif's to run adjoint with exactConserv
2073    o case GM_BOLUS_ADVEC should be cleaned
2074      S/R gmredi_slope_psi should be cleaned
2075    o verification/carbon now has exactConserv=.TRUE.
2076    
2077    checkpoint47g_post
2078    o time-average AIM output: becomes independent from statvars time-average
2079      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2080    o After TAF bug fix:
2081      Tested adjoint of gmredi package.
2082      Tests were done with checkpoint47 rather than with latest
2083      checkpoint47f_post since the latter is broken for the adjoint
2084      verification/carbon/ contains both ADM and TLM gradient checks.
2085    Here they are, before they get changed/lost/stolen.
2086    Mostly modif.'s to fix numerical sensitivities.
2087    Gradient checks OK for
2088    - GM_taper_scheme:
2089      * clipping
2090      * ac02
2091      * linear
2092      * glw91
2093      * dm95
2094      * ldd97
2095    - GMREDI_OPTIONS:
2096      * GM_VISBECK_VARIABLE_K
2097      * GM_NON_UNITY_DIAGONAL
2098      * GM_EXTRA_DIAGONAL
2099      * GM_BOLUS_ADVEC
2100    in conjunction with data.gmredi parameters to be checked in
2101    in a few minutes under verification/carbon/code/
2102    
2103    checkpoint47f_post
2104    Merging from release1_p10:
2105    o modifications for using pkg/exf with pkg/seaice
2106      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2107        and SEAICE_EXTERNAL_FLUXES
2108      - pkg/exf CPP options EXF_READ_EVAP and
2109        EXF_NO_BULK_COMPUTATIONS
2110      - usage examples are Experiments 8 and 9 in
2111        verification/lab_sea/README
2112      - verification/lab_sea default experiment now uses
2113        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2114    
2115    checkpoint47e_post
2116    o created a tag prior to creating a branch
2117    
2118    checkpoint47d_post
2119    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2120      at the bottom boundary had an erroneous half slip boundary condition
2121    o added bottom drag and no slip boundary condition capabilities to
2122      oceanic pressure coordinates code
2123    o added new verification experiment global_ocean_pressure, this experiment is
2124      also described in the tutorial section of the manual
2125    checkpoint47d_pre
2126    
2127    checkpoint47c_post
2128    o Added a verification experiment for a global cubed-sphere ocean run
2129      -  verification/global_ocean.cubed32x32x30
2130      -  uses pkg/therm_seaice and pkg/bulk_forcing
2131    
2132    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2133    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2134      when using P-coordinate; only implemented for atmospheric config.
2135    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2136      NOTES: requires option NONLIN_FRSURF to be "#define".
2137    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2138    
2139    checkpoint47b_post
2140    Merging from release1_p9:
2141    o pkg/seaice
2142      - removed GOTO's and added taf directives
2143      - double precision constants to reduce the g77 (Linux)
2144        to F77 (SGI) differences reported in release1_p8
2145    o tools/genmake
2146      - added SGI options
2147    o verification/testscript
2148      - updated to that of checkpoint47a_post
2149    o verification/global_ocean.90x40x15/input/eedata
2150      - modified for SGI f77 compatibility
2151    o verification/lab_sea
2152      - added description of sea-ice model
2153      - added missing matlab routines
2154      - added test of thermodynamics parallelization
2155    
2156    checkpoint47a_post
2157    o new pkg: aim_v23
2158     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2159       for now, keep the same surface forcing as before.
2160     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2161     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2162     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2163    o add diagnostic of surface correction term in monitor output
2164    
2165    o bulk_force and therm_seaice
2166    - Two packages:  bulk_force (Bulk forcing)
2167      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2168    - Earlier integration from Stephaine Dutkiewicz
2169      and Patrick Heimbach.
2170    - Two ifdef statements for compile time,
2171       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2172    
2173    checkpoint47
2174    differentiable version of checkpoint46n_post
2175    o bug fix in quasihydrostaticterms
2176    o * "clean" adjoint code (in terms of extensive recomputations)
2177        can now be obtained for all GMREDI options (i.e. for
2178        - GM_VISBECK_VARIABLE_K
2179        - GM_NON_UNITY_DIAGONAL
2180        - GM_EXTRA_DIAGONAL
2181        - GM_BOLUS_ADVEC )
2182      * However, wrong gradient check problem remains unsolved.
2183      * New CPP options have been introduced for different
2184        tapering schemes
2185    o external_fields_load now part of differentiation list
2186    o pressure needs multiple storing;
2187      would be nice to have store_pressure at beginning or
2188      end of forward_step, e.g. by having phiHyd global (5-dim.)
2189      (NB: pressure is needed for certain cases in find_rho,
2190      which is also invoked through convective_adjustment).
2191    o recomputations in find_rho for cases
2192     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2193    o #define ATMOSPHERIC_LOADING should be differentiable
2194    o ini_forcing shifted to begining of initialise_varia
2195    o Incorporating QNVS line search routines into MITgcm
2196      (this is separate code, and therefore not under pkg)
2197      lsopt/, optim/
2198    o Updated verification/carbon/
2199      - #define GM_VISBECK_VARIABLE_K
2200      - GM_taper_scheme    = 'ldd97'    
2201    
2202    checkpoint46n_post
2203    Merging from release1_p8:
2204    o verification/natl_box:
2205      updating new external_fields_load routine
2206    o New package: pkg/seaice
2207      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2208      The sea-ice code is based on Hibler (1979-1980).
2209      Two sea-ice dynamic solvers, ADI and LSR, are included.
2210      In addition to computing prognostic sea-ice variables and diagnosing
2211      the forcing/external data fields that drive the ocean model,
2212      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2213      The implied surface heat flux is then stored in variable
2214      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2215      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2216      non-local transport term.  Because this call precedes model
2217      thermodynamics, temperature under sea-ice may not be "exactly" at
2218      the freezing point by the time theta is dumped or time-averaged.
2219      N.B.: fairly large differences in accuracy occur across
2220            different platforms/compilers; comparison between
2221            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2222            generated output gives:
2223       T           S           U           V
2224      C D M    c        m  s        m  s        m  s        m  s
2225      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2226      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2227      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2228    
2229      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2230    o GAD:
2231      - generated new common blocks to account for call of
2232        same gad routines with differing traceridentities
2233        (needed to modify tracerIdentity indices in GAD.h)
2234      - generated separate common blocks for case useCubedSphereExchange
2235        (Department of Futurology)
2236      - parameter lists to gmredi_?transport: added tracerIdentity
2237      - added new key indices to tamc.h
2238    o external_fields_load:
2239      - added this routine to TAF list
2240      - needed to make some common blocks global and additional storing
2241        along the same lines as exf package (checkpoint_lev?_directives.h)
2242    o exf:
2243      updated external forcing package
2244      - bug fixes carried over from ecco-branch
2245        (missing OBCS_OPTIONS.h in two routines)
2246      - enable easy to use "no forcing".
2247      - added exf I/O for atmospheric loading
2248      - added exf I/O for runoff data
2249      - transfered scaling between exf <-> MITgcm to exf namelist
2250    o Adding new verification experiment global_with_exf.
2251      This verification experiment is almost identical to the
2252      global_ocean.90x40x15 experiment, except that it uses
2253      the exf (and cal) package instead of the
2254      external_fields_load routine (cf README file).
2255    
2256    checkpoint46m_post
2257    o modified testscript to return -- when there are no lines of "%MON" output
2258  o added new flag "quasiHydrostatic" for QH mode  o added new flag "quasiHydrostatic" for QH mode
2259    and new routine quasihydrostaticterms()    and new routine quasihydrostaticterms()
2260  o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)  o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)

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