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revision 1.163 by jmc, Thu Jun 12 21:25:24 2003 UTC revision 1.695 by heimbach, Fri Jul 7 21:56:15 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 take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
8    o commit code to make SST/SSS weights spatially variable
9      (based on either variable in-situ or variable initial T/S weights)
10    o commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
11      now based on horizontally varying weights wthetaLev, wsaltLev
12    
13    checkpoint58k_post
14    o testreport:
15     - always build in dir. "build" (if not there, mkdir build instead of building
16       & running in input)
17     - run in dir run (if it exists), in build otherwise.
18     - call prepare_run (if input/prepare_run exists)
19     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
20    o pkg/exf modifications to interpolation and rotation routines for more
21       reasonable treatment of North Pole singularity: for tracers North Pole
22       value is set to northernmost zonal-mean value, for zonal velocity it is
23       set to zero, and for meridional velocity it is set to northernmost value.
24    o pkg/exf/exf_check_range.F
25     - add tile index to diagnostics and move stop statement to the very
26       end of the routine.
27    o pkg/diagnostics: (diagnostics_main_init.F)
28      define title of isomorphic variables according to the current config.
29    o pkg/thsice with pkg/seaice dynamics:
30    - fix domain of computation (interior only, required for exf) and do exchanges
31    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
32    o towards a standard way of dealing with multi-threading in MONITOR
33      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
34    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
35       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
36    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
37    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
38    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
39       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
40    o tracer advection:
41     - clean-up and simplify calc_common_factors.F
42     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
43       advection subroutine (but still not used within DST advection S/R)
44    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
45    
46    checkpoint58j_post
47    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
48      from file (collects calls previously in FORWARD_STEP)
49    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
50    o adjoint store dir. adjusted accordingly
51    o genmake2
52      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
53    
54    checkpoint58i_post
55    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
56      on wind stress (SEAICEstressFactor defaults to 1.)
57    o Total number of Timers is finite (<=40): comment out 2 non-essential one
58      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
59    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
60      on CS-grid: no longer loosing mass.
61    o exf & curvilinear-grid: no longer modify longitude xC & xG.
62    o pkg/ggl90: fix sloppy output and fix a bug
63    o pkg/seaice: added SEAICEuseEVPpickup parameter
64      - Set to false in order to start EVP solver with
65        non-EVP pickup files when using SEAICEuseEVP
66      - fix sign error in diffusion in seaice_calc_rhs
67    
68    checkpoint58h_post
69    * Modifications for bottom topography control
70      o replace hFacC by _hFacC at various places
71      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
72      o add non-self-adjoint cg2d_nsa
73      o update autodiff support routines
74      o re-initialise hfac after ctrl_depth_ini
75      o works for 5x5 box, doesnt work for global_ocean.90x40x15
76    * Adding verification for 5x5 box (4-layer) bottom topography control
77    
78    checkpoint58g_post
79    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
80       used for mean seasonal cycle, mean diurnal cycle); add an example
81       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
82    o pkg/ggl90:
83      - add parameter (minimum surface kinetic energy)
84      - fix bug (avoiding division by zero)
85    o couple pkg/thsice to pkg/seaice:
86      - modify advection in seaice to accomodate new scalar fields to be advected
87      - only muliDimAdection scheme work with seaice/thsice
88      - mapping of thsice-variables to seaice-variables, back and forth
89      - does not break the verification experiments, but does not give the
90        desired results either
91    o pkg/seaice
92      - make (default) second order advection a bit less confusing?
93    
94    checkpoint58f_post
95    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
96      to pkg/seaice):
97      - new routines thsice_map_exf and thsice_get_exf provide the interface
98      - add an additional formal parameter to thsice_solve4temp
99    o pkg/exf:
100      - add new fields wspeed, snowprecip (to be able to couple to thsice)
101      - correct Stefan-Boltzmann constant
102      - new parameter for longwave surface emittance
103      - separate some stuff from exf_bulkformulae into new routines  
104        exf_radiation, exf_wind
105      - add new parameters and constants: longwave emissivity for ocean, ice
106        and snow, evaporation parameters over ice
107      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
108        either wind from stress or stress from wind
109    o pkg/thSIce:
110    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
111    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
112       and THSICE_CALC_THICKN
113    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
114    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
115      to make debugging easier.
116    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
117    o pkg/bulk_force:
118      - clean-up comments and parameters ;
119      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
120    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
121      generate new output for test-experiment: aim.5l_cs.thSI
122    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
123      testreport accordingly
124    
125    checkpoint58e_post
126    o SEAICE_CGRID adjoint done
127    o R_STAR adjoint implemented.
128      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
129      * need to sort out init. of h0facc, etc.
130    o Make pkg/profile fully independent of ecco,cost, etc. stuff
131      to be able to use it in pure forward.
132    
133    checkpoint58d_post
134    o upgrade simple test-experiment to tutorial example:
135     step.1: duplicate the experiment and (step.2) will remove the old copy.
136      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
137      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
138      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
139      tutorial_global_oce_biogeo    <- copy of dic_example
140      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
141      tutorial_plume_on_slope       <- copy of plume_on_slope
142      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
143      tutorial_global_oce_optim     <- empty for now (David ?)
144      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
145     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
146    o correct a sign problem in cost_scat.F
147    o obcs and ptracers: fix boundary conditions for advections schemes
148      with larger stencil
149    o thsice adjoint: start
150    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
151      completeness
152    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
153      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
154    o ptracers adjoint:
155      * avoid extensive recomputatations
156      * fix missing re-init. of gptr (missed by TAF)
157    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
158      me to turn off the excessive output to STDOUT that this package produces
159    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
160      and add those terms in Vector-Invariant formulation.
161    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
162      if the control period (xx_hfluxperiod etc) is 0
163    o in profiles pkg, clean routines and fix details
164    o in ecco pkg, reading ssh data:
165      fix problem in case the model does not start at iter0=0
166    o fix mnc-pickup/restart for ptracers
167    o new package prifiles:
168      code to compute profile-based cost by Gael Forget
169      (modifs in ecco, ctrl, autodiff)
170    o Benign bug fix in initialization (spotted by M. Mazloff) of
171      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
172    
173    checkpoint58c_post
174    o adjoint: finish NLFS adjoint and provide reference output in
175      verification/global_ocean.90x40x15/results_ad_nlfs
176    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
177      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
178      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
179      with SEAICE_CGRID defined.
180    o move calendarDumps from "data" to "data.cal" and clean-up the code
181      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
182    o add useEXF & useCAL flags (for now, set in hard-coded way)
183    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
184      (were missing in NH mode, and wrong in quasihydrostatic mode).
185      waiting for Chris updated version of calc_gw to add those CALLs.
186    o fix bug in quasihydrostatic S/R ;
187      add a test for this option: global_ocean.90x40x15.qshyd
188    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
189      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
190    o add on/off flag useOffLine for package OFFLINE
191    o seaice:
192      - modify advection so that it works also on the C-grid
193      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
194        problem in multi-tile runs with C-grid
195      - add flags for clipping ice velocities and/or masking solver forcing
196      - fix drag (ocean on ice) formulation and a bug that caused noise in the
197        C-grid solver
198      - added a few comments to seaice_diffusion.F
199      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
200        are now exclusive)
201      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
202        required re-ordering the code a little:
203       + make DAIRN global variable (defined in SEAICE)
204       + move computation of the viscosities eta and zeta into a new separate
205         routine (because I need to recompute them in seaice_ocean_stress.F)
206    
207    checkpoint58b_post
208    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
209      update output.txt of exp. aim.5l_cs.thSI
210    o various mnc cleanups and improvements:
211      + shrink lookup tables by factor of ~4
212      + better error reporting when running out of lookup space
213      + able to handle longer path/file names (up to 500 chars)
214    o adjoint:
215      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
216      - TBD: "hidden" mom_vecinv recomp. in dynamics
217    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
218     (allow to differentiate between forcing components using new integer flags:
219      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
220     and add new flag to put Dissipation tendency out of Adams-Bashforth.
221    o ecco
222      - enable trend removal from SSH anomaly obs.
223    o adjoint
224      - a fix for PmEpR when #undef EXACT_CONSERV
225      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
226      - try to fix "hidden" recomp. in forward_step for NLFS
227        (NLFS seems broken sometimes after I checked it in)
228    o seaice:
229     - add c-grid version of the dynamic solver:
230       + three new routines that are the c-grid substitute lsr, dynsolver
231         and ostres
232       + put a few fields that were local to dynsolver into global common
233         blocks, so that I can move the computation of stresses etc into
234         seaice_lsr (saves coding but may break the adjoint).
235     - replace more hardwired parameters by runtime parameters
236     - add ice masks that mask the rhs of the implicit solvers where there
237       is no ice (commented out in seaice_dynsolver, because i am not sure
238       if this works properly), eventually this should replace the clipping
239       of ice velocities in seaice_dynsolver to +/-40cm/s.
240    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
241      include it only where its needed
242    o move balancing of fluxes before the call of external_forcing_surf
243    o seaice:
244      - correct units of turning angles (now they are really in degrees)
245      - move computation of GWATX/Y out of main routine into dynsolver
246      - initialize GWATX/Y in seaice_init
247    o Apply mask on Fresh-Water flux (needed for SSH forcing).
248      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
249    o seaice: add runtime flags for turning angles (default to zero)
250    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
251      and trend from exf forcing and ctrl control adjustments
252    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
253      (since checkpoint57x_post)
254    o change the default rotation period to 86164.s = the Earth rotation
255    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
256      and based on a reference stratification. Tested within hs94.cs-32x32x5.
257    o seaice advection: add code for choosing between the default (2nd order
258      central differences) and multiDim advection schemes provided by
259      pkg/generic_advdiff
260    o seaice:
261      - removed all references to SEAICE_GRID.h fields from
262        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
263        (cubed-sphere configuration will change a little)
264      - grid computations in seaice_init are obsolete now.
265      - cleaned up code a little so that is easier to read (hopefully).
266      - added new (better?) discretizations of default advection and diffusion
267        (turn on with SEAICEuseFluxForm)
268      - replace 1 in 3d global fields by kSurface in growth.F
269      
270    checkpoint58a_post
271    o seaice:
272      - bug fix in advect.F
273    o shelfice:
274      - separate shelfice load anomaly from pload (breaks with time
275        dependent forcing), => introduce constant field shelficeLoadAnomaly.
276        Its default is 0., but it may be computed more cleverly from (unknown)
277        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
278        done offline. A good approximation of the pressure load anomaly is
279        necessary to avoid large initial adjustment processes underneath
280        deep-reaching shelfice.
281      - small fix in ISOMIP shelfice_thermodynamics
282      - add more sophisticated thermodynamics of Hellmer (1989), this is
283        now the default
284      - give a few constants more intuitive names
285    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
286      if bulk formulae are used in long integration (especially EmPmR). Turn
287      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
288      if balancePrintMean, the imbalance that is substracted is printed to
289      STDOUT.
290    o fix bug (typo) in obcs_apply_eta.F
291    o add a new package shelfice which enables us to model the circulation
292      underneath shelf-ice with draughts of hundreds of meters.
293     - works
294     - to do: + include improved thermodynamics
295              + check whether kSurfC (from model/inc/SURFACE.h) can be used
296                instead of new field kTopC
297              + can we use topoFile, Ro_surf and existing code in ini_depth.F
298                instead of new field R_shelfIce and new code in ini_depth.F
299                and ini_mask_etc.F?
300              + adjust vertical mixing schemes?
301    o seaice pkg:
302     - add a cpp-flag to include a simple formula for a salinity dependent
303       freezing point of sea water at the surface
304     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
305       meridional stresses are now different (and hopefully correct)
306    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
307       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
308       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
309    o pkg/diagnostics: add options and parameters for regional-statistics
310       diagnostics ; define regions by reading a region-mask from a file
311       (might add other options later)
312    o pkg/bulk_force:
313     - add option and parameters to use AIM surface-flux formulae.
314     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
315       others forcing fields (defined in PARM05, parameter file "data") are loaded
316       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
317     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
318     - use the right EXCH call for uwind,vwind (to work on CS-grid).
319     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
320       and parameters (note: calcWindStress replaces .NOT.readwindstress).
321     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
322    
323    checkpoint58
324    o add "--embed-source" option to genmake2 which, when the supporting
325      tools can be compiled (as determined by genmake2) will turn on the
326      embed_files package which then embeds the entire MITgcm source code
327      (*.[fFhc] + Makefile) used for the build within the executable
328      - requested by CNH but off by default
329      - adds a paltry <9MB to the mitgcmuv executable in most cases
330      - only writes the output when useEMBEDSRC in eedata is true
331    o clean up 3-dim. relaxation codes:
332      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
333      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
334      * Thanks to Tom Haine for testing!
335    
336    checkpoint57z_post
337    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
338      affects output (@ truncation level) of exp. plume_on_slope ; updated.
339    o fix the pickup behavior for obcs in combination with ptracers
340    o fix a bug in ptracers_external_fields_load
341    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
342      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
343    o transfered surface NH pressure to eta field (if exactConserv).
344    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
345         and update lab_sea output.txt file.
346    o completing 3-dim. relaxation code: additional term
347         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
348      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
349      * At compile time, in "EXF_OPTIONS.h" set
350          #define  ALLOW_CLIMTEMP_RELAXATION
351          #define  ALLOW_CLIMSALT_RELAXATION
352      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
353          tauThetaClimRelax3Dim = 15552000.0,
354          tauSaltClimRelax3Dim  = 15552000.0,
355      * 3 cases:
356          1) Use a constant-in-time 3-dim. field
357          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
358          3) Real-time relax. to time-evolving prescribed field
359    o Adding Laplacian-type smoothness constraint on
360      initial and boundary (forcing) controls (ic, bc)
361      * enable at compile-time via
362        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
363      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
364      * Absolute scale somewhat unclear so far
365      * no area weighting was included since no other cost term does so far
366    
367    checkpoint57y_post
368    First step for a NLFS adjoint
369    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
370    o new init. routines for calc_r_star, calc_surf_dr
371    o still need to deal with ini_masks_etc
372    o testreport seemed happy
373    checkpoint57y_pre
374    
375    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
376    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
377    o add new offset feature to offline pkg (plus minor cleanup)
378    o cfc fixes for final year of integration
379    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
380      be in GCHEM_OPTIONS).
381    
382    checkpoint57x_post
383    o fix testreport Pb in multiple test experiment.
384    o cleanup our namelist syntax in verification:
385      - make it more F95 standards compliant (some work still needed)
386      - allows the vast majority of our tests to work with gfortran
387    o Non-Hydrostatic:
388     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
389     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
390    o Allow to apply AB on T,S rather than on AB(gT,gS):
391     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
392     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
393       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
394     - need a "clever" read_pickup to restart from the other AB formulation
395    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
396    o remove some unused variables (reduces number of compiler warnings)
397    o adjoint
398      * Disable useVariableViscosity for adjoint for time being
399        (there are a number of extensive recomputations)
400      * Initialize certain variables needed for adjoint
401    
402    checkpoint57w_post
403    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
404                 fix the singleCpuIO RS version of MDSWRITEFIELD
405       and add a WARNING if using globalFiles=T with multi-processors.
406    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
407      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
408    o tracer advection scheme:
409      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
410       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
411       was not very convenient).
412      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
413       (further tests needed for the implicit DST & Flux-Limiter schemes).
414    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
415      and sRef for convenience, handy, when you want to initialize
416      ptracers in a large domain with a constant non-zero value. Also,
417      untangle ptracers_init.F a little.
418    
419    checkpoint57v_post
420    o change dome exp. to use variable viscosity in side-drag terms.
421    o remove all the files from the cfc_offline test since they are now
422      incorporated into tutorial_cfc_offline which has been producing
423      identical results for a few days of testing
424    o add new parameter: sideDragFactor to enable half-slip-side BC
425      and change side-drag S/R to use viscosity from mom_calc_visc
426      (can switch back by setting sideDragFactor=0.); affects results at
427      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
428       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
429    o vorticity & strain are now computed without masking, to account for
430      no-slip-side BC in variable viscosity calculation ; mask is applied
431      anyway later on, before computing advection/coriolis terms.
432    o modify exp4 to test new obcs support for reading from external files
433      and for passive tracers
434    o fix behavior of ptracers_monitor when monitor output is written to a
435      netcdf-file; still not independent of monitor.F (writes in the same
436      file).
437    o change default value of tRef (put a uniform, meaningful value for ocean
438      & atmos) and initialize sRef (was missing, as Martin mentioned).
439    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
440      to be proportional to enstrophy dissipation length.  Thus,
441       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
442      This is now consistent with Smagorinsky and with the manual.
443    
444    checkpoint57u_post
445    o OBCS and PTRACERS: add open boundary support for passive tracers
446      - either use homogenous (pseudo) v.Neumann conditions or prescribe
447        OB-values from file; this is not different from the way theta and salinity
448        are treated
449      - however, Orlanski-radiation conditions are not supported, and the model
450        will stop if you use pTracers and Orlanski at the same time.
451      - beefed up the rountine obcs_external_fields_load: now only those open
452        boundary values are overwritten with values from files for which there
453        are really files, otherwise the OB-fields remain untouched. This makes
454        it possible to use different OBs at different ends of the domain (as
455        with EXF)
456    o reduce number of exch calls in shap_filt (s2).
457    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
458      truncation level) 4/5 MLAdjust test results (11&12 digits match).
459    
460    checkpoint57t_post
461    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
462    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
463      same truncation, independent of the face number: affects affects several
464      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
465    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
466      note that biharmonic viscosity + no-slip was not tested in any experiment.
467    o fix bug in non-linear free-surf side-drag ; generate new output for
468      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
469    o make mnc honor the writeBinaryPrec flag for most kinds of output
470    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
471    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
472      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
473    o add brackets in multi-terms sum to get same truncation, independent of
474      the face number (manage to get exactly same value of gU,gV at the cs-edge)
475      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
476    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
477      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
478      a maximum grid-scale Reynolds number.  Also, changes all length calculations
479      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
480      Suggested values of viscosity parameters found in mom_calc_visc.
481      Many new viscosity diagnostics available.
482    
483    checkpoint57s_post
484    o Add clearing-house for viscosity calculations, mom_calc_visc and
485      correct numerous bugs in LeithD and Smagorinsky discretizations.  
486      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
487      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
488      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
489      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
490      The Strain-Tension form is now called with useStrainTensonVisc=.true.
491      ViscAhStrain and viscAhTension are now retired.
492    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
493    o In response to JMC's bug report, genmake2 now ignores any soft-links
494      that it finds in the *current* directory when searching for files.
495      Soft-links found in any other source directories will still work as
496      they did before.
497    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
498      a C routine to unlimit the stack size
499    o mnc-ify pkg/aim snapshot vars
500    o mnc-ify pkg/land as requested by Daniel
501    o various changes to mnc including:
502      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
503      - output can now be grouped so that all files within a group
504          change the ITER portion of their names in lock-step together
505      - can now read ("global") PER-FACE (in addition to PER-TILE) files
506          and works with both EXCH1 and EXCH2 (but needs more testing)
507      - writing works for all verification test cases w/ g77 on Linux
508    
509    checkpoint57r_post
510    o make MNC variable initialization happen earlier
511    o add diagnostics for (almost) each term of the momentum Eq.
512    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
513    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
514    o remove MINIMAL_TAVE_OUTPUT option ;
515      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
516    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
517      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
518    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
519    o add time-dependent SST, SSS control
520    o cost terms in ecco/ modularized (new cost_generic.F)
521    o cost_averages routines are modularized (new cost_averagesgeneric.F)
522    o new infrastructure for seaice model vs. obs misfits in seaice/
523      * driver from the_main_loop.F is seaice_cost_driver.F
524      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
525      * gradient check in Exp. 6a of natl_box_adjoint/
526    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
527      (see README file)
528    
529    checkpoint57q_post
530    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
531    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
532      - bug was reported by Jean-Michel and Ian Fenty
533    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
534      update exp. cpl_aim+ocn output.
535    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
536      Needed for high-res. runs with large global files
537      to be able to limit tapelev size
538    o Changed some tests for adjoint:
539      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
540      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
541      * global_ocean.90x40x15/ back to default 3-level checkpointing
542    o Modifications to enable scripted COMMON to MODULE conversion
543      * verification/OpenAD/code/ has necessary scripts and description;
544      * converts, compiles and runs successfully;
545    
546    checkpoint57p_post
547    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
548    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
549      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
550    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
551    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
552      (was already the case for dissipation with mom_vecinv,
553       and also the case for grad.PhiHyd when staggered-timeStep)
554      This will allow to put dissipation out-off the AB time-stepping.
555     Unfortunately, affects truncation error. Update output of exp. that "fails"
556      (cg2d matching number) and leave the others for later: front_relax(10),
557      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
558      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
559    
560    checkpoint57o_post
561    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
562      (2) its ready to be documented during the 20050801 DocFest
563    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
564      for ideal_2D_oce and lab_sea on linux_ia32_g77
565    o set to #undef CTRL_SET_OLD_MAXCVARS_30
566      in global1x1_tot/code_seaice_adj to access indices 32, 33
567      (worth another tag)
568    
569    checkpoint57n_post
570    o adding precip control xx_precip 32
571    o adding swflux control xx_swflux 33
572    o Replacing 10 forcing penalty cost routines by 1 generic.
573    o Implementing partitioning in time-mean and variable adjustment
574      for atmos. state.
575    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
576    o in natl_box_adjoint:
577      * updated exp 1 to 10
578        (but does not have time-mean vs. variable split results yet)
579    o updated global1x1/*_seaice_adj/
580      to incorporate latest changes
581    o enable useSingleCpuIO for mdsio vector routines
582      (applies in particular to tapelev I/O)
583    o removed inefficient K-loop in all active_file*control*.F
584    
585    checkpoint57m_post
586    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
587      and advect_cs (use EXCH-2 and standard cs-32 grid files).
588    o pkg/exch2: filling of face-corner halo regions is optional
589      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
590    
591    checkpoint57l_post
592     tag before updating tutorials (pre-release-2)
593    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
594       for output and interpolation of input fields onto model grid)
595    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
596       Affects results of exp. rotating_tank ; update output.txt.
597    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
598          and taking the square quantity and/or using a fraction-weight field.
599    o fix aim_diagnostics_init.F mate numbers.
600    o add mnc output capability to diagnostics/diagstat and update
601      our cvsignore files for the ACSII output generated
602    
603    checkpoint57k_post
604    o lab_sea now uses diagnostics package and provides a suite of
605      new EXF diagnostics output.
606    
607    checkpoint57j_post
608    o exf
609      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
610        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
611        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
612      * extended diagnostics output
613        - now includes all EXF variables
614        - hs, hl moved to common block
615        - separate S/R for diagnostics, called after ctrl vector is added
616        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
617        - EXFqnet contains true Qnet (i.e. includes qsw)
618      * updated verif. lab_sea, global_with_exf
619      * Rearranging hflux (exf_mapfields -> exf_getforcing)
620        to ensure that diagnostics sees a true EXFqnet
621    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
622    o diagnostics pkg: change pointers so that 1 diagnostic can be used
623      several times with different frequencies.
624    o mnc-ify the thsice package as requested by Daniel Enderton
625      - the monitor--MNC output needs work
626      - many attributes need to be added (most are currently blank)
627    o mnc-ify theaim_v23 package as requested by Daniel Enderton
628      - many attributes need to be added (most are currently blank)
629    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
630    o add Sadourny like discretization to the 4th.O vorticity advection scheme
631    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
632      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
633         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
634    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
635     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
636    
637    checkpoint57i_post
638    o Diagnostics package was changed: diagnostic allocation is now deactivated
639      by setting an empty file name in the namelist (used to be by setting 0 frequency)
640    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
641      add 1rst Order upwind vertical Shear.
642    o add a quick fix for A/B checkpointing in OFFLINE mode
643    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
644      end-run around the C/Fortran linking horror in eesup/src/timers.F
645    o added pkg/runclock: allows user to terminate run based on wall clock
646    o added non-hydrostatic scaling parameter: nh_am2
647    o pkg/my82: futile attempt to make results compiler-independent by adding
648      some "_d 0", etc. no effect.
649    o for mnc output, fill the 'T' coordinate var with myTime and create a
650      separate 'iter' variable for iteration count
651    o pkg/diagnostics:
652      add new capability: output of Global/Regional & per-level statistics ;
653      tested against monitor output (including land & thSIce) on various exp.
654    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
655    
656    checkpoint57h_done
657      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
658      data.diagnostics, data.gchem, data.ptracers) is done.
659    
660    o pkg/diagnostics: prepare for Global/Regional statistics.
661      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
662    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
663      and rename it: DIFFERENT_MULTIPLE
664    
665    checkpoint57h_post
666    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
667    o pkg/diagnostics: change output frequency, now in seconds (instead
668      of Nb of iterations). This requires to change data.diagnostics.
669    checkpoint57h_pre
670    
671    o in mnc, let the user create the output dir if both mnc_outdir_date
672      and mnc_outdir_num are false
673    o add fflags() to pkg/diagnostics which allows one to specify, on a
674      per-file basis, the file precision [default behavior is unchanged]
675    o added diagnostics to pkg/kpp, including computation of mixed layer
676      depth based on a temperature/density criterion
677    o updated verification/natl_box to test the new pkg/kpp diagnostics
678    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
679    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
680    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
681      not mnc -- this mistake was found by JMC and is now corrected
682    
683    checkpoint57g_post
684    o add Adams-Bashforth 3rd Order time stepping:
685      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
686      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
687    checkpoint57g_pre
688    
689    o make lambda[Theta,Salt]ClimRelax spatially varying
690      (default remains spatially uniform constant based on tau)
691    o added new control variables
692      * init. uVel, vVel, etanN
693      * lambda[Theta,Salt]ClimRelax
694    o separate masks used for ctrl_pack/unpack 'from write_grid' output
695      (suggested by G. Forget)
696    
697    checkpoint57f_post
698    o add parameter "baseTime" = model base time = time at iteration zero
699      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
700      account for baseTime shift
701    o move Coriolis arrays from PARAMS.h to GRID.h
702    checkpoint57f_pre
703    
704    o mnc-ifying the seaice package
705    o introduced an alternative length scale calculation for use in the limiting
706      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
707    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
708    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
709      as well as grad(vort3).  Made it compatible with both approximate form
710      for the cubed sphere and full form of these gradients.  Added flag
711      useFullLeith to select between approximate and full form.  
712    o add "d0" in getcon.F to reduce differences between compilers/platforms
713      update output.txt of exp. fizhi-gridalt-hs
714    o change port_rand funtion to allow to set the seed.
715    o fix obscure MNC bug involving conversion between reals and integers
716      - it caused no problems with certain (eg. gcc, ifc) compilers but the
717        new version is now more standards-compliant
718    o adjoint-related modifications
719      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
720      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
721      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
722    
723    checkpoint57e_post
724    o Adding eddy stress controls a la Ferreira et al.
725    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
726    
727    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
728      update output.txt of exp. fizhi-gridalt-hs
729    o add more "Z" dimensions and associated coordinate vars to MNC
730    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
731    o parameter calendarDumps: when set, approximate months (30-31 days) and years
732      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
733      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
734      months and years.  Requires pkg/cal.
735    o diagnostics: add pickup functionality
736      - off by default for backwards compatibility
737      - current version only uses MDSIO -- MNC will be added
738    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
739    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
740    
741    checkpoint57d_post
742    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
743    o modify verification/ideal_2D_oce so that it tests the creation of mnc
744      output from the diagnostics package
745    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
746    o make genmake2 more portable by using ".$FS" instead of ".f" for more
747      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
748    o add coordinate variables to the MNC output from the diagnostics package
749    o change MNC-flags default value: true when useMNC=TRUE
750    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
751      the ability (off by default) to read the grid information using MNC
752    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
753    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
754    o do snap-shot diagnostics at the middle of the time-interval (instead of
755      at the end).
756    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
757      new test for AIM with thSIce + slab-ocean
758    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
759    o move state variable diagnostics to the beginning of the time step ;
760      (note: still needs some work specially for snap-shot diagnostics)
761      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
762    
763    checkpoint57c_post
764    o Change testing option (-ieee) to get closer agreement between g77 & ifort
765    o generate new output.txt files on faulks with g77 & the new -ieee option
766    checkpoint57c_pre
767    
768    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
769      update output.txt of exp. global_ocean.90x40x15
770    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
771      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
772    o add saltFlux(+File) forcing capability with periodicExternalForcing
773    o allow to use pkg diagnostics for GM-Redi & ThSIce output
774    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
775    o improvements for the MNC output from DIAGNOSTICS:
776      - correct handling of the unlimitied dimension
777      - all dims now have associated coordinate variables
778      - variables located at U, V, and Corner ("Z") points are now written
779        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
780        *all* data points are output
781    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
782    o added pkg/seaice/seaice_monitor.F
783    o mdsio_readfield.F can now read files visible only to master MPI process.
784    o pkg/seaice: some test code for ice-modified ocean stress
785    o exf_getffields interpolation defaults to bilinear for all scalar forcing
786      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
787      spurious negative numbers for precipitation and humidity.  Will cause
788      some small numerical differences for integrations using pkg/exf/exf_interp.F.
789    o pkg/ctrl/
790      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
791        May be enabled via doPackDiag
792      *  introduce z-scaling of
793         + gradient (doZscalePack) and
794         + control (doZscaleUnpack)
795    o pkg/mdsio/
796      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
797      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
798    
799    checkpoint57b_post
800    o simplify options in diagnostics_fill arguments (remove weird combinations)
801    o fix MNC coordinate variables so that they now contain per-face index
802      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
803      general, EXCH2 grids are only aligned to a "local" coordinate system
804    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
805    o Implement instantaneous output within pkg diagnostics:
806      setting a negative frequency in data.diagnostics produces
807     "snap-shot" output (as opposed to time-average if freq > 0)
808    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
809      NOTE: change ptracer diagnostics name: use 2 characters to work with
810            more than 9 tracers. Add also diagnostics of advect & diffus flux.
811    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
812      becomes the coordinate variable for the 'T' dimension
813    o add CF-style coordinate variables to MNC
814      - just a first cut:  numbers are meaningless on the cubesphere and
815        missing along the T axis but otherwise it works!
816    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
817    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
818    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
819      this is based directly on what the model compute, so that the content of
820      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
821    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
822    o clean up build options files for SunOS, in particular
823      - remove -traditional from xmakedepend
824      - change -xarch=v9 to -xarch=native for f77
825      - restore use of make (not gmake)
826      - add CC=gcc if using g77
827    o changes per discussion of AM, JMC, & EH3 today:
828      - move redundant "grid" variables out of "state" -- in preparation of
829        creating proper CF-style coordinate variables and in recognition
830        that any/all grid variables can be easily copied (eg. w/NCO) from
831        the grid files into any of the other NetCDF files
832      - *always* output grid variables with MDSIO (this will eventually be
833        changed)
834      - output MNC grid file if useMNC is true
835    o every instance of _END_MASTER() has been found and replaced with
836      _END_MASTER( myThid ) in order to satisfy certain picky Sun
837      preprocessors
838    o re-arrange diagnostics pkg initialisation:
839     - allow each package to extend the available diagnostics list
840     - add some checking and fix small problems (multi-threaded, ...)
841     - new S/R diagnostics_fill (replace fill_diagnostics):
842       look through the short list of active diag. (instead of the long list)
843       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
844    
845    checkpoint57a_post
846    o this set of changes restores TAMC compatibility
847      tested for global_ocean.90x40x15 adjoint on trough
848      (what a pain)
849    
850    checkpoint57a_pre
851    o some modifs in tools/build_options for sunos
852    o call ctrl_pack for ctrl at end for optimcycle=0
853    
854    checkpoint57
855    o add horizontal bi-harmonic viscosity for vertical velocity
856      - new parameter viscA4W (defaults to viscA4)
857      - affects only non-hydrostatic code
858      - to be done: no-slip lateral boundary conditions
859    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
860    o implement Implicit Vertical advection for pTracers
861    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
862      (implemented also for implicit vertical diffusion & advection)
863    o OBCS: extend application of tracer open boundary conditions
864      to a strip beyond the boundary of width Olx/Oly
865    o add call monitor to TAF set of required calls (flow directives)
866      and include in natl_box_adjoint
867    o untangle a few ifdefs related to cost, ctrl, autodiff
868      untangel a few ALLOW_ECCO_OPTIMIZATION
869    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
870      (theta2, salt2 in ecco_cost_weights)
871    
872    checkpoint56c_post
873    o OBCS as control variables
874      - update ctrl_ad_diff.list, obcs_ad_diff.list
875      - remove balance of obcs controls from default
876      - fix index bug nobcs in ctrl_init
877      - fix dummy fields filen in ctrl_pack
878      - add dummy weights for obcs
879    o lsopt: comment out fort.94 output
880    o optim:
881      - remove unnecessary header files
882      - adjusted namelists
883      - add xerbla.F to Makefile
884    o exf:
885      - multiple modifications of exf_check_range
886      - unit change in exf_init_runoff from [m/year] to [m/s]
887    o mdsio:
888      - i/o-vector change debugLevel from debLevA to debLevB
889    
890    checkpoint56b_post
891    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
892      is called from DO_THE_MODEL_IO
893      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
894      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
895      - clean up PTRACERS_WRITE_TIMEAVE a little
896    o add another verification experiment that tests both the cfc-pkg and
897      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
898      reactive tendencies treated inline with regular timestepping
899    o testreport previously did a lousy job of comparing small numbers, so
900      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
901      implemented in the little c-progam tmp_cmpnum.c which is embedded in
902      testreport.
903    o ptracers_monitor: bug fix for MPI
904    
905    checkpoint56a_post
906    o GCHEM: finish reorganizating the package
907      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
908        (introduces another 3D-array for each passive tracer, but only if
909        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
910        gchemTendency is not needed because the timestep is done separately)
911      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
912      - GCHEM is now---more or less cleanly---separate from PTRACERS
913      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
914        so clear to me how that should be done in a general way.
915    o CFC: improve formatting of output in CFC_ATMOS
916    o PTRACERS:
917      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
918        that ALL experiments with ptracers enable can be checked. This makes
919        GCHEM_MONITOR obsolete.
920      - include a runtime parameter PTRACERS_monitorFreq that defaults to
921        monitorFreq
922      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
923    o add PTRACERS (PTR0[1-5]) to testreport output
924    o exf_check_range:
925      * default changed to .TRUE.
926      * will check values for niter0 if debLevA, every timestep if debLevB
927      * STOP in exf_check_range if 'out of range'
928      * range chosen generous to allow for potential extema
929      TBD: a version with stricter range
930           permitted range would be runtime parameters
931    o GMredi:
932      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
933      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
934      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
935    o GCHEM:
936      - move call to GCHEM_FORCING_SEP, so that it is now called before
937        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
938      - introduced a useGCHEM runtime flag and applied it everywhere.
939      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
940        this flag is now only visible within GCHEM-pkg routines.
941      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
942        be replaced by a 3D array that is computed before thermodynamics; for
943        this, the tracer ID iTracer had to be included into the parameter list
944        of ptracers_forcing
945      - set up forward_step to call gchem_forcing, that will replace
946        gchem_forcing_int in ptracers_forcing
947      - cleaning up
948    o small cleaning of exch2: remove files that are also in eesupp/src
949    
950    checkpoint56
951    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
952    o mnc: cleanup "full" files--fixes out-of-memory problem
953    o ECCO-GODAE
954      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
955      * fully merged and updated from SIO code
956        windstress sign change affects
957        - exf_inscal_[u/v]stress
958        - sign of xx_tau[u/v] adjustments
959        - signs in cost_scat
960      * ctrl_get_gen: avoid update of tau[u/v] for first few days
961      * natl_box_adjoint updated and compressed
962      * 2-level checkpoint switch added
963        (tested in EXP. 1 of natl_box_adjoint)
964      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
965    o SVD
966      * first complete, non-hacked version for SVD calculations
967      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
968        performed via direct access files admtlm_vector.it????
969        (via ctrl_[un]pack)
970      * optimcycle is used for ARPACK iteration counter
971        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
972      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
973        and add linear transforms where necessary
974      * controls are initial/final SST, SSS (can be extended; need to check
975        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
976    o mdsio: filename info to both stderr, stdout
977    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
978      from sign change
979    
980    checkpoint55j_post
981    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
982      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
983    o add consistent build directories and .cvsignore files to verification
984    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
985    o make all subroutines 30 or less characters in length for certain older
986      compilers to work (a thorough search only turns up two routines in
987      pkg/ptracers)
988    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
989      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
990    
991    checkpoint55i_post
992    o change arrays for total vertical diffusivity (2.D if explicit,
993      3.D if implicit) ; each ptracer uses its own background value.
994    o added mnc/NetCDF output capability to ocn_compon_interf
995      - added bits to verification/cpl_aim+ocn so that it can run on
996        ITRDA and other clusters without the mpirun "-wd" option
997    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
998      configuration
999    o give MNC the ability to create additional files rather than
1000      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1001      - the default is just less than 2GB which is a practical limit
1002        on many systems
1003    o Compute the non-local term using either KPP vertical diffusivity (=default)
1004       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1005    
1006    checkpoint55h_post
1007    o add verification test "vermix"
1008    o remove all the *_ioinc flags and replace with the single global
1009      outputTypesInclusive flag
1010    o allow to set a vertical profile of vertical diffusivity for T & S
1011    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1012    o useMNC moved from data.mnc to data.pkg
1013    
1014    checkpoint55g_post
1015    o Renaming carbon AD experiments to comply with testreport conventions
1016    o Updating adjoint of Held-Suarez hs94.1x64x5
1017    o Fixing directives for non-ECCO forward_step, after ECCO directives
1018      have been fixed to avoid recomp. of do_oceanic_phys
1019      Works well for global_ocean.90x40x15,
1020      but recomp. issue remains for carbon
1021    o Updating adjoint output for natl_box_adjoint after
1022      pkg/ecco has been modified (see taga c55d_post)
1023    
1024    checkpoint55f_post
1025    o rename to timeave_init_fixed
1026    
1027    checkpoint55e_post
1028    o some delicate re-shuffle of store directives to avoid one
1029      extra call of do_oceanic_physics
1030      affects ecco_the_main_loop.F, do_oceanic_physics.F
1031      checkpoint_lev1_directives.h
1032    o NB: this may break global_ocean adjoint temporarily,
1033      but it is clear how to fix it. Will do later, need this now.
1034    
1035    checkpoint55d_post
1036    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1037    o ecco_cost_weights is modified to 1x1 runs
1038    o modifs to allow observations to be read in as
1039      single file or yearly files
1040    o enable to read exf forcing fields as either
1041      single file or yearly files (flag useExfYearlyFields)
1042    checkpoint55d_pre
1043    
1044    o switch between 2-level and 3-level checkpointing
1045    o add ability of MNC to write local and "partial" (eg. 2D slices where
1046      the full 3D field is never actually stored) arrays to NetCDF files
1047      with the correct (that is, the complete multi-dimensional) set of
1048      array indicies
1049      - used in mom_vecinv() to write the diagFreq output
1050      - tested (demonstrated) in verification/aim.5l_cs
1051    o further mnc-ification
1052      - add verification/lab_sea to the list with mnc setups
1053      - fix undefined mnc v-names in cd_code
1054      - add kpp to mnc output (both snapshot and timeave)
1055    o non-hydrostatic code
1056      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1057        in calc_gw.F
1058      - defaults to viscAh
1059      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1060        friction or Leith) in non-hydrostatic mode, as long as there is
1061        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1062    o pkg/cost
1063      extend simple cost functions to treat time mean quantities
1064      (T,U,V) via cost_accumulate_state from cost_tile
1065    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1066        be 2 times larger than the minimum size the advection scheme requires.
1067        now get a perfect conservation of salt in advect_cs test-exp (updated)
1068    o GGL90 (Gaspar's TKE mixed layer)
1069      - add horizontal diffusion of TKE, requires exchanges in
1070        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1071        default. In OPA there is no horizontal diffusion of TKE but the
1072        mixing coefficients are computed from a horizontal average of TKE of
1073        6 points or so. I think that diffusion has a little more physical
1074        justification.
1075      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1076        was in vain)
1077      - mask tke-variable in ggl90_init
1078    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1079    o fix biharmonic diffusion on CS-grid.
1080    o more obcs stuff
1081      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1082        for reading boundary values. This routine is called from
1083        obcs_prescribe_read
1084      - updated obcs_check
1085      - changed sponge layer relaxation parameter units for days to seconds
1086      - turned off sponge layer by default
1087      - changed argument list of OBCS_CALC to myTime+deltaTclock
1088      - fixed about 35 bugs in obcs_external_fields_load
1089    
1090    checkpoint55c_post
1091    o obcs stuff
1092      - new runtime flags useOBCSprescribe, useOBCSbalance
1093      - re-arranged obcs_calc
1094      - moved exf_getobcs to obcs_prescibe_read
1095        obcs_prescibe_read is called after ORLANSKI stuff
1096        and independent of it (executable can contain all).
1097      - updated obcs_check
1098      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1099        These may be necessary only if tangential velocities are
1100        prescribed at OB, not sure, needs testing.
1101    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1102      which simplifies the calls and passes the ifc check-bounds test
1103    
1104    checkpoint55b_post
1105    o add a 2D scalar, Z location, exchange_2 routine.
1106    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1107      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1108      affects advect_cs results (for the wrong reason): update output.txt
1109    o use a more standard discretization for biharmonic viscosity ;
1110     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1111      affects results of dome set-up: update output.txt
1112    o fix gad_advection.F (CubedSphere part), back to version 1.23
1113    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1114    
1115    checkpoint55a_post
1116    o merged code to
1117      * prescribe/read time-dependent open boundaries
1118        (works in conjunction with exf, cal)
1119      * sponge layer code for open boundaries
1120      * each boundary N/S/E/W now has its own CPP option
1121        (healthy for the adjoint)
1122    
1123    checkpoint55
1124    o up-to-date adjoint of previous breaks
1125      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1126      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1127      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1128      - carbon: * remove tr1-related adjoint verification
1129                * add ptracer as control variable
1130    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1131      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1132    
1133    checkpoint54f_post
1134    o in verification/carbin/ remove experiment related to
1135      ALLOW_PASSIVE_TRACER (array tr1 etc)
1136      code_ad/ input_ad/ results_ad
1137    
1138    o add two new packages
1139      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1140        + subject to optimization (memory)
1141      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1142        + subject to reordering (many GOTOs in the original code)
1143        + so far opps is called for every (i,j) point, and then operates in
1144          the vertical; one may want to reorder the scheme in order operate in
1145          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1146          fields)
1147    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1148      - all verification tests compile and run with linux_ia32_g77
1149      - defaults are compatible with current input files--nothing
1150        should change if you were not previously using MNC
1151      - MNC output has been added in numerous places (eg. timeave)
1152        but there are still a few writes not yet do-able with MNC
1153        (this is in progress)
1154      - flags now allow for either/or/both use of MDSIO and MNC and
1155        documentation will soon follow
1156      - numerous small formatting cleanups for ProTeX
1157    o add version info (via BUILD_INFO.h) to MNC and stdout
1158    
1159    checkpoint54e_post
1160    o add two new packages
1161      - pp81 (Packanowski and Philander, 1981), Richardson number and
1162        stratification dependent mixing
1163      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1164      - these scheme operate in a similar manner as KPP (without ghat, of
1165        course), however there is only one diffusivity that is used for both
1166        temperature and salinity (and passive tracers)ç
1167    o add offline package
1168    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1169      provided by Stephanie Dutkiewicz
1170    o genmake2: add ability to search for C compilers and cleanup test output
1171      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1172    
1173    checkpoint54d_post
1174    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1175    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1176      leading to additional shift by 5 days each year of integration
1177       (i.e. leading to considerable offset over the years)
1178    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1179    o start with no AB and no initial filtering (staggerTimeStep):
1180      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1181    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1182      (external loading & cpl import/export stay in forward_step.F)
1183    o update coupling interface to work with new staggerTimeStep
1184    o change MDSIO ptracers_pickup.
1185    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1186    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1187    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1188    
1189    checkpoint54c_post
1190    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1191      this affects (truncation error) output.txt of test-exp:
1192       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1193    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1194    o change Qnet to always be the net heat flux, (+upward).
1195      affects (truncation error) output of natl_box exp.: updated
1196    o define the max number of passive tracers in PTRACERS_SIZE.h
1197    o start to test mnc routinely in exp0
1198    o add sea-ice loading (sIceLoad) as a new forcing field.
1199    
1200    checkpoint54b_post
1201    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1202       impressive on Altix and Opteron systems)
1203    o diagnostics can now write NetCDF files through the mnc package
1204    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1205    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1206    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1207      affects (truncation error) output of lab_sea & natl_box exp.: updated
1208    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1209    
1210    checkpoint54a_post
1211    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1212    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1213    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1214    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1215      + internal_wave (shift in writing cg2d_ini_res)
1216    checkpoint54a_pre
1217    
1218    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1219      - modified verification/lab_sea and natl_box_adjoint accordingly
1220    
1221    checkpoint54
1222    checkpoint53g_post
1223    o prepare splitting of thermodynamics: store convect.counter in common block
1224    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1225      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1226    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1227    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1228    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1229    o restore adjointability
1230    
1231    checkpoint53f_post
1232    o modifications that affect AIM experiment results (update output.txt):
1233      - no advection of S at top interface Nr (pkg/generic_advdiff)
1234      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1235    o AIM pkg:
1236      - include stability function into surf.Flux derivative relative to Tsurf
1237      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1238    
1239    checkpoint53e_post
1240    o merged cylindrical coord configuration
1241    o added rotating_tank experiment
1242    checkpoint53e_pre
1243    
1244    checkpoint53d_post
1245    o faulks upgraded: re-generate output.txt that have changed:
1246       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1247    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1248    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1249    o added Sadourny discretization of Coriolis
1250      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1251      - re-enabled use of omega3 (useAbsVorticity)
1252    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1253      vector-invariant equations
1254      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1255    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1256      hopefully without new bugs
1257      - still to do: biharmonic friction for non-hydrostatic w
1258    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1259    o regenerated output for global_ocean_ebm (using -ieee)
1260    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1261      of mom_common/
1262      - simple re-arrangement of instructions within computing loop
1263    checkpoint53d_pre
1264    
1265    checkpoint53c_post
1266    o new version of coupler for AIM+thSIce and Ocean models
1267     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1268     - land: change Evaporation of snow
1269     - aim with thSIce: fix bug in snow-precip.
1270    o changes to calc_gw.F
1271     - bug fix for w^2 term near the bottom boundary
1272     - (hopefully) improve the lateral slip boundary condtions for use with
1273        partial/looped cells
1274      - because the bug fix changes two verification experiments anyway (exp5
1275        and plume on slope), change the lateral boundary condition from half slip
1276        to the value of no_slip_sides
1277    o ebm package wasnt quite up to the parallel task. Fixed that.
1278    o Adjoint of EBM package + verification
1279      * TLM OK
1280      * ADM not sufficient accuracy yet (needs further testing)
1281    
1282    checkpoint53b_post
1283    o Commiting new energy balance model to repository
1284      * package is pkg/ebm
1285      * verif. is verification/global_ocean_ebm
1286      * references are in ebm_driver.F
1287    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1288    C        Global thermohaline circulation. Part I:
1289    C        Sensitivity to atmospheric moisture transport.
1290    C        J. Climate 12(1), 71-82
1291    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1292    C        Global thermohaline circulation. Part II:
1293    C        Sensitivity with interactive transport.
1294    C        J. Climate 12(1), 83-91
1295    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1296    C        Destabilization of the thermohaline circulation
1297    C        by atmospheric eddy transports.
1298    C        J. Climate 7(12), 1870-1882
1299    o Will need long integration testing.
1300    checkpoint53b_pre
1301    
1302    o created pkg/mom_common in preparation for variable viscosity code
1303    o renamed and split ini_mnc_io
1304    o pkg/land: only liquid water can diffuse or run-off
1305    o AIM using land: soil wetness availability account for snow
1306    o added printMapIncludesZeros to EEPARMS namelist
1307    
1308    checkpoint53a_post
1309    o restore TAMC compatiility for exf_constants.h
1310      (no usage of _d in .h)
1311    o Additional storing in KPP in an attempt to fix
1312      TAMC problem with adjoint of KPP code.
1313      (no success...)
1314      Identical code works fine with TAF.
1315    o Fixed verification/natl_box_adjoint experiments.
1316      Initial conditions for Experiments 4 and 5 are now
1317      set to "SEAICE_initialHEFF=0", which is more reasonable,
1318      and hence gives results closer to that of Experiment 2.
1319      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1320    
1321    checkpoint53
1322    o stable checkpoint with up to date adjoint
1323      TLM tests only run for 1st grdchk at the moment. Its unclear if
1324      this is a code problem or a problem with resetting code for g_
1325      variables that is being autogenerated wrong.
1326      Otherwise:
1327       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1328       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1329         are both still in chaos following their security messes.
1330    
1331    checkpoint52n_post
1332    o various build (mostly genmake2) changes including:
1333      - ability to build/run more easily within Cygwin and MacOS X
1334      - more complicated Makefiles with a stronger dependence on Gnu Make
1335    o pkg/seaice modifications
1336      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1337        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1338        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1339      - changed proxy for geostrophic velocity and updated
1340        verification/lab_sea/results/* accordingly
1341      - removed ADI dynamic solver from pkg/seaice
1342      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1343        they caused a segmentation fault under certain circumstances
1344      - removed unused field WATR
1345    o bug fix in exf-package:
1346      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1347         now reflect that.
1348    o small fixes in the cal-package:
1349      - set reference date to first of January for the 'model'-calendar
1350      - failing of cal_CheckDate in cal_FullDate now actually results in a
1351        warning
1352    o small modifications in exf-package to increase flexibility:
1353      - change climtempfreeze from a constant to a runtime parameter that
1354        is specified in data.exf_clim (default = -1.9)
1355      - introduce runtime parameter windstressmax (default = 2.0) that is
1356        specified in data.exf
1357    o fix in pkg/thsice:
1358      - update Evap (Tsf changes) to be consistent with Latent heat flux
1359      - maintain snow precipitation unchanged (even if Tsf >=0).
1360     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1361    
1362    checkpoint52m_post
1363    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1364      this does not change any of the results, because myIter=0 in swfrac always
1365      lead to jwtype=2 (the default anyway), but the call makes little sense
1366      as a default
1367    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1368    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1369      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1370    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1371    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1372    o extending useSingleCpuIO option to work with new exch2 I/O format
1373      - old-style, missing-tile I/O is still accessible by defining CPP
1374        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1375    o monitor package can write to NetCDF files and/or STDOUT
1376    o fix re-definition bug in MNC_GRID_INIT_ALL()
1377    o doc/api_reference added
1378      - a framework for building an API Reference Manual using all
1379        the "protex" comments embedded in the code
1380      - see pkg/generic_advdiff, pkg/mnc for examples
1381    o MNC:
1382      - make myThid the last argument for all subroutines
1383      - new default for the grid files: NO halos
1384      - add useMNC and other run-time flags
1385      - separate per-file-group handling of the unlimited dimension
1386      - early initialization of MNC w/ flags read at the eeboot stage
1387        and lookup tables set in initialize_fixed
1388      - write all MNC output to a freshly-created directory
1389    o thermodynamics sea-ice (thsice) is now tested with testreport.
1390    o test exp. advect_cs: use the standard cs32 grid ; update output.
1391    o Added functionality to grdchk:
1392      pick global i,j,k position (or nearest wet) where to perform check.
1393    
1394    checkpoint52l_post
1395    o new land formulation:
1396      a) use ground enthalpy as prognostic variable to ensure exact
1397         energy conservation.
1398      b) account for water temperature and for latent heat of freezing
1399         in all processes (rain, run-off, ground storage)
1400      c) compute surface and ground temperature implicitly.
1401    o aim_v23 modification for new land model:
1402      a) Treat separately land / ocean / sea-ice surface fluxes
1403         to allow implicit computation of land & sea-ice surface temp.
1404      b) add snow precipitation.
1405    checkpoint52l_pre
1406    
1407    o fix problem (when 1 tile is empty) in min/max monitor.
1408    o fix bug in timeAve (u,vZetatave in common block)
1409    o no restoring terms under ice for pkg/seaice
1410    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1411    o bug fix for pkg/seaice pickups
1412    o change MNC call locations and add coordinate attributes
1413    o mask vorticity at the corner ; affects global_ocean.cs output
1414    o fix ini_curvilinear_grid ; test CS experiments with mpi
1415    o aim.5l_cs: modify sea-ice fraction input file ; update output
1416    o exf: Adding simple range check routine for exf fields after read
1417    
1418    checkpoint52k_post
1419    o removed top-level directory "diags"
1420      - we migrated these functions to pkg/timeave a long time ago
1421    o fixed bug introduced in pkg/monitor
1422    o accuracy ctrlprec = 32 insuffient for gradient checks using
1423      averaged fields (I/O via cost_averages)
1424      -> use ctrl.h in active_file*.F to control I/O precision.
1425    o paramter list of CALL ADTHE_MAIN_LOOP
1426    o added initial do_the_model_io to ecco
1427    o set all ...Freq to zero after cost_final
1428      taveFreq, dumpFreq, pChkptFreq
1429    o MAIN and ECCO differentiability restored
1430    
1431    checkpoint52j_post
1432    o fix nchklev in tamc.h for global_ocean...
1433    o Bringing flow and store directives up-to-date
1434    o Really weird thing!
1435      call do_the_model_io from the_main_loop with parameters
1436      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1437      TAF places a faulty re-call of initialise_varia
1438      after cost_final call which should not be there!
1439    checkpoint52j_pre
1440    
1441    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1442      error messages
1443    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1444    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1445      debug output
1446    o modfied mdsio_writefield.F to handle non-global files under exch2
1447    o update AIM Cubed-Sphere exp (aim.5l_cs):
1448      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1449    o update AIM Equatorial Channel exp:
1450      use standard aim_v23 pkg and change the SST fields to be more realistic.
1451    o globalFile now works with exch2
1452    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1453      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1454    o limit timeave output for hi-res integrations
1455    
1456    checkpoint52i_post
1457    o removed CPP_EEOPTIONS.h from verification/*/code
1458    o updated the tiling for global_ocean_pressure
1459    checkpoint52i_pre
1460    
1461    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1462      the old pkg/aim).
1463    
1464    checkpoint52h_pre
1465    o shortened offending lines in exch2_send_rx?.template
1466    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1467    o genmake2: add build & execute test for NetCDF code
1468    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1469      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1470    o added useSingleCPUIO flag to monitor.F and mon_out.F
1471    o added temporary hack for sea-ice dynamics on the cube:
1472      metric terms are ignored and it is assumed that
1473      there is no sea-ice on cube faces 1, 2, 4, and 5.
1474    
1475    checkpoint52f_post
1476    o added exch2 cube routines to pkg/exch2
1477    o modified hs94.cs-32x32x5 to use it
1478    o added new grid files to hs94.cs-32x32x5
1479    checkpoint52f_pre
1480    
1481    checkpoint52e_post
1482    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1483      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1484    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1485      to work with implicit vertical advection and AB ;
1486    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1487    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1488     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1489    checkpoint52e_pre
1490    
1491    o fix bug in impldiff when Nr=1 or Nr=2.
1492    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1493    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1494    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1495      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1496    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1497    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1498    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1499    
1500    checkpoint52d_post
1501    o re-tiled many expts to allow comparison in multi-processor mode
1502      - updated output accordingly
1503      - changed hs94.128x64x5 to use intial T from file rather than use the
1504        random number generator
1505    o add infrastructure in model routines for fizhi and gridalt packages
1506    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1507    o changes to permit hi-res, cubed-sphere, configuration
1508      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1509      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1510      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1511        of surface winds for the cube
1512      (A verification experiment, based on global_ocean.cs32x15, but with
1513       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1514       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1515       complete with example surface forcing files and matlab scripts to look
1516       at the output and compare it with that of global_ocean.cs32x15.)
1517    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1518       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1519       to conform to the common rule.
1520    o check-in the first version of the coupler + interfaces for multi-components
1521       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1522       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1523       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1524       - ocean and atmos. share the same horizontal grid (no interpolation).
1525       - exchanges between component and coupler is done in forward_step
1526    o new verification experiment, cpl_aim+ocn:
1527       coupled ocean - AIM atmosphere on cs32 grid.
1528    
1529    checkpoint52d_pre
1530    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1531    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1532    
1533    checkpoint52c_post
1534    o Fixing OPTIONS files for use of exf:
1535      - ALLOW_ECCO not needed
1536      - ECCO_CPPOPTIONS.h should not be included from
1537        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1538        as has been the case in the past
1539      - All cal/exf related options are currently set in
1540        single header file. Should remain so until we
1541        agree on a consistent new policy.
1542    o Removed all CPP options for cal package.
1543      cal has no more CPP options.
1544    o modified STOREs in GAD_ADVECTION
1545    o corrected key comp. for passkey
1546    
1547    checkpoint52b_post
1548    o new version: "thsice" of thermodynamic sea-ice pkg:
1549     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1550     - modify fluxes but do not change theta directly;
1551     - light cleaning of bulk_force pkg (still needed with thsice).
1552     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1553       + output_thsice.txt to test thsice & bulk_force pkgs.
1554    o put back grid & coriolis monitor output.
1555    checkpoint52b_pre
1556    
1557    o call "do_the_model_io" at the beginning (=> dump initial state)
1558    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1559    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1560      (need info on NUMBER_OF_PTRACERS)
1561    o missing PTRACERS headers in some routines
1562    o default tamc.h in pkg/autodiff supposed to crash
1563      to ensure proper customization
1564    
1565    checkpoint52a_post
1566    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1567      - moved surfaceTendencyTice from pkg/seaice to main code
1568      - subroutine FREEZE_SURFACE now limits only surface temperature
1569        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1570        => new output.txt for global_ocean.cs32x15 & global_with_exf
1571      - keep the old version of FREEZE for backward compatibility;
1572        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1573      - corresponding modifs for TAF directives
1574    o added surface flux output variables to TIMEAVE_STATVARS
1575    o time-averaged output for pkg/ptracers
1576    o fix problem with ECCO-related divided adjoint
1577      snapshot file was missing some ad-variables,
1578      but no warning issued by TAF
1579    
1580    checkpoint52a_pre
1581    o some bug fixes for #undef REAL4_IS_SLOW
1582    
1583    checkpoint52 = ecco_c52_e35
1584    o after testing adjoints of checkpoint51u_post
1585    
1586    checkpoint51u_post
1587    o this is the post-merge tag of the ecco-branch
1588      (needs another clean checkout and re-testing)
1589    o various natl_box_adjoint configs and results
1590      but no input fields
1591    o obcs adjoint not yet merged!
1592    o adding ECCO global 1x1 and 2x2 degree configs
1593    o updated/extended some store directives for seaice
1594    o pkg/ecco now containes ecco-specific part of cost function
1595    o top level routines the_main_loop, forward_step
1596      supersede those in model/src/
1597      previous input data.cost now in data.ecco
1598      (new namelist ecco_cost_nml)
1599    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1600    
1601    checkpoint51t_post
1602    o this is the pre-merge tag of the ecco-branch
1603    
1604    checkpoint51s_post
1605    o cleanup: removed various obsolete #define-s
1606    o pkg/grdchk
1607      - renamed 'ph-grd 3' to 'grad-res'
1608      - merged from ecco-branch
1609        (remaining bug fixes for obcs gradient checks)
1610      - additional high-precision output for testreport
1611        (grep for 'precision_grdchk_result')
1612    
1613    checkpoint51r_post
1614    o cleaned up or removed CPP_OPTIONS.h files
1615    o updated results for some of the tests to reflect the new
1616      optfiles (-ieee: -O0 instead of -O3)
1617    
1618    checkpoint51q_post
1619    o cd_code:
1620      - moved cd_scheme.F -> cd_code_scheme.F
1621      - separate read_checkpoint from cd_code_ini_vars.F
1622      - separated cd_code part from write_checkpoint
1623      - updated AD_SOURCE, generated .flow
1624      - added CD_CODE_VARS.h to the_main_loop
1625      - Moving cd_code specific store dir.s to pkg/cd_code
1626    o ctrl package totally restructured
1627      - pack/unpack now optional and decoupled from
1628        xx_/adxx_ I/O
1629      - ctrl_pack/unpack cleaned
1630        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1631      - confined inclusion of AD_CONFIG.h to where necessary.
1632    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1633    
1634    checkpoint51p_post
1635    o create initial cd_code package
1636      - WARNING: the initialization of fields within packages
1637        is broken because INI_FIELDS (where READ_CHECKPOINT is
1638        called) is called *before* PACKAGES_INIT_VARIABLES.
1639        This seems to be backwards since
1640        1) its important to initially zero the entire field including
1641           the "halo" region
1642        2) zeroing needs to be done *before* reading pickup info
1643           and the pickup call might or might not happen in any
1644           particular run
1645      - this needs an overhaul for R2
1646    o cleanup verification/*/code/GMREDI_OPTIONS.h
1647    o cleanup testreport
1648    
1649    checkpoint51o_post
1650    o bringing AD-related verif's up to date with genmake2
1651      - carbon/
1652      - global_ocean.90x40x15/
1653      - hs.94.1x64x5/
1654      - (front_relax/ )
1655    o (more) consistent directory structure for AD-related verif.'s
1656    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1657    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1658    o bug fix in find_alpha.F for MDJWF:
1659      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1660        change rho -> rho-rhoConst
1661      - replace call find_rho to find_rhonum
1662    o initialisation of rFlx extended to full array (required by TAF)
1663      and shifted to thermodynamics
1664    o removed PTRACERS.h in ptracers routine
1665    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1666    o Correcting initialisations for fVerU, fVerV.
1667    o helping TAF to recognize dependency on kUp for
1668      fVerU, fVerV
1669    o Replacing delZ by delR in pkg/ctrl/
1670    checkpoint51o_pre
1671    
1672    o undid all of cp51 pending some cleanups and discussion
1673    o added the [#include "AD_CONFIG.h"] statement to all files that need
1674       it for adjoint/tl #defines
1675     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1676     o removed tools/genmake since it no longer works
1677    
1678    checkpoint51n_post
1679    o modifications to make FREEZE flux visible to pkg/kpp
1680      - moved surfaceTendencyTice from pkg/seaice to main code
1681      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1682      - subroutine FREEZE now limits only surface temperature
1683        (this means new output.txt for global_ocean.90x40x15,
1684         global_ocean.cs32x15, and global_with_exf)
1685    o added surface flux output variables to TIMEAVE_STATVARS
1686    
1687    checkpoint51n_pre
1688    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1689    o added [#include "AD_CONFIG.h"] to all files that use the following
1690      defines:
1691      - ALLOW_ADJOINT_RUN
1692      - ALLOW_TANGENTLINEAR_RUN
1693      - ALLOW_ECCO_OPTIMIZATION
1694    
1695    checkpoint51m_post
1696    o incorporating changes to get TAMC/TAF working in genmake2
1697      - added new TAMC/TAF targets to the Makefile
1698      - various cleanups related to package handling
1699      - these changes should have no impact on the forward model
1700    
1701    checkpoint51l_post
1702    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1703     - faster algorithm for cal_addtime.F
1704     - higher precision arithmetic, where needed
1705     - pkg/exf *startdate variables changed from calendar date to
1706       model integration time
1707    
1708    checkpoint51l_pre
1709    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1710    o enable to apply restoring on S & T only in a latitude band.
1711    o update output (external_forcing_surf modif. change truncation errors)
1712       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1713    
1714    checkpoint51k_post
1715    o change default to: useNHMTerms=.FALSE.
1716     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1717       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1718     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1719        exp1, ideal_2D_oce
1720     - change data file of oceanic exp (leave the results unchanged for now)
1721       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1722    o set gravitySign automatically according to the vertical coordinate used
1723      (and change sign: back to "logical" value: +1 when R increases downward)
1724    o added an include barrier to the default CPP_OPTIONS.h and
1725      removed the #include "PACKAGES_CONFIG.h" from it
1726    o fix a bug in mom_fluxform (from chk51j_post)
1727    
1728    checkpoint51j_post
1729    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1730    o adjusted some flow directives (dynamics, thermodynamics)
1731    o added cubed-sphere case to test cost function
1732    o heckpoint_lev?_directives.h now include
1733      pkg-specific directives, whenever those are enabled.
1734    o Moving pkg-specific flow directives to corresponding pkg
1735      Moving pkg-specific differentiation list to corresponding pkg
1736      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1737      ---> conventions are
1738           - pkg_ad.flow
1739           - pkg_ad_diff.list
1740           - pkg_ad_check_lev?_dir.h
1741    
1742    checkpoint51i_post
1743    o merge of the branch-genmake2
1744      - knowingly breaks the older genmake
1745      - automatic generation of all ALLOW_${PKG_NAME} defines
1746      - new testreport supersedes older testscript
1747    o large number of package inclusion and header cleanups
1748    checkpoint51i_pre
1749    
1750    o new output for adjoin of global ocean vector invariant
1751    o fix for checkpoint of thermodynamic seaice and bulk_force
1752    o Steph gchem various cleanups
1753    
1754    checkpoint 51h_pre
1755    o fixed some single quotes
1756    o modify gchem pkg to be more versatile
1757    o modifications to clean up dic pkg
1758    o add pkg/cfc
1759    
1760    checkpoint51g_post
1761    o provide links for ARPACK and ADM*TLM
1762    o start removing verification/vero/
1763    o update AD-related stuff
1764      (in particular some IF-statements in model/src/ routines)
1765    o adding to verification/global_ocean.90x40x15/ adjoint of
1766      vector invariant setup
1767    
1768    checkpoint51f_post
1769    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1770    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1771      of tracer Green's fucntions for ocean inversion project.
1772    
1773    checkpoint51f_pre
1774    o Added on-the-fly spatial interpolation capability
1775        "USE_EXF_INTERPOLATION" to pkg/exf.
1776      - This is a temporary Cartesian-grid hack until
1777        the super-duper ESMF coupler becomes available.
1778      - See verification/global_with_exf/README for usage example.
1779      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1780        flags and modified pkg/seaice accordingly.
1781    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1782        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1783        non-local transport term.
1784    
1785    checkpoint51e_post
1786    o pkg/mom_vecinv:
1787      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1788      - add time-ave diagnostic of vorticity advection.
1789    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1790    o atmospheric geopotential: - include water vapor effect;
1791                                - use p^kappa in p* scaling.
1792    o land pkg: read initial state from files.
1793    o AIM : add stratospheric drag in the upper level
1794    
1795    checkpoint51d_post
1796    o change function ILNBLNK (=> last non-blank char.) to return zero
1797      (instead of the string length) when the string. char is empty
1798    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1799    o modif's to restore TAMC compatibility
1800      - avoid "_d" constructs in PARAMETER declarations
1801      - avoid interrupting lines by comment lines
1802    o Use cluster local disks for purely local I/O
1803      vs. globally visible disks needed for ctrl stuff
1804      (merged from ecco-branch)
1805      - new active_file_loc... and mdsio_..._loc routines
1806      - affected packages: autodiff, ctrl, grdchk, mdsio
1807    
1808    checkpoint51c_post
1809    o introducing integer flag debugLevel
1810      - debLevZero: suppress all output
1811      - debLevA: standard
1812      - debLevB: equivalent to current debugMode=.TRUE.
1813    o introducing pathname variable mdsioLocalDir for mdsio
1814      that can be specified at runtime
1815      (relevant for cluster I/O to local disk)
1816    `
1817    >>>checkpoint51b_post
1818    adjoint of ptracers
1819    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1820    o extended state in checkpoint_lev?, etc.
1821    o alternative ctrl/cost with tr1 or ptracer
1822    o new comlev1_bibj_ptracers
1823    o new ptracers.flow
1824    o made ptracers_forcing same as external_forcing_s
1825    o added verification for adjoint with ptracers
1826      - adm. grdchk fail so far
1827      - tlm. grdchk OK
1828      - checked tapelev/comlev recomputations: OK
1829    <<<checkpoint51b_pre
1830    
1831    checkpoint51a_post
1832    o added code for biogeochemistry package
1833      - new pkgs: dic, gchem
1834      - new subroutine in ptracers
1835    o modify code for biogeo packages
1836      - in model/src and pkg/ptracers
1837    
1838    checkpoint51
1839    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1840      - autodiff, ctrl, exf, grdchk, seaice
1841      kept separate packages
1842      - cost, ecco, obcs
1843    o updating verification/internal_wave, verification/lab_sea
1844      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1845    
1846    checkpoint50i_post
1847    o Preparing next differentiable checkpoint and sync
1848      of MAIN vs. ecco-branch
1849      - 1st step: this one is differentiable
1850      - 2nd step: next(! not this) checkpoint will have updated packages
1851                  from ecco-branch)
1852    
1853    checkpoint50h_post
1854  o new package "land": provide surface BC for AIM.  o new package "land": provide surface BC for AIM.
1855  o pkg/ptracers: apply exchange to all tracers after reading a pickup.  o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1856  o AIM: use true log-P extrapolation for near surface temp (= as in  o AIM: use true log-P extrapolation for near surface temp (= as in
1857      F.Molteni paper) ; update aim.5l_cs output.      F.Molteni paper) ; update aim.5l_cs output.
1858  o New variable in PARM03 for more flexible pickups  o New variable in PARM03 for more flexible pickups
1859    o somewhat cleaned package initialisation sequence for
1860      ctrl/ cost/ ecco/ in packages_... routines
1861    
1862  checkpoint50g_post  checkpoint50g_post
1863  o merged with release1_p17 (pkg/seaice and verification/lab_sea)  o merged with release1_p17 (pkg/seaice and verification/lab_sea)

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