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revision 1.519 by heimbach, Thu Jul 28 14:35:47 2005 UTC revision 1.851 by dimitri, Thu Jul 19 15:34:50 2007 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7  o adding precip control xx_precip  o gather_2d/scatter_2d: removed halo regions
8  o moved ptracer ctrl index 17 -> 32  o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
9      scheme and the corresponding test case (under front_relax dir). For now,
10      only available with Skew-flux form and not yet tested in realistic set-up.
11      adjoint: store directives updated, but gradient checks deteriorated,
12      so maybe GM/Redi adjoint is now broken.
13    o seaice adjoint
14      * add AREA, HEFF, HSNOW as control variable
15        (should not change lab_sea results)
16      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
17    o pkg/seaice:
18      * added computation of saltFlux in seaice_growth;
19        For time being, sea ice salinity is assumed constant
20        contribution of snow flooding to freshening of sea ice is neglected.
21        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
22        defaults to 0.0 in order to maintain backward compatibility.
23        Typical values for SEAICE_salinity are 4 to 10 g/kg.
24      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
25      * added SEAICE_availHeatFrac, which specifies fraction of surface level
26        heat content used to melt or grow ice
27      * commented out cap of HICE: it helps keep ice thinner
28      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
29      * applied OBCS T/S mask to HEFFM sea ice mask
30    
31    checkpoint59d
32    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
33     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
34     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
35    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
36     and change default value of parameter "GM_Small_Number";
37     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
38       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
39       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
40    o pkg/ecco: cost function when applying pkg/smooth to controls
41    o pkg/ctrl: add forcingPrecond run time parameter
42    o pkg/seaice:
43     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
44     - fix bug in metric terms of u-equation in LSR solver (implicit part),
45       changes verification/lab_sea
46     - rearrange implicit part of u-equation in LSR solver to make it easier to
47       read, understand, and debug. This causes changes at the truncation level.
48     - fix (serious) bug in the boundary conditions (sign error in the implicit
49       part) of the LSR solver. Changes all LSR results.
50     - fixed problem with HSNOW initialization to avoid thick snow when AREA
51       is initilized with small values - does not change lab_sea results.
52     - added HsnowFile initialization capability
53    o pkg/smooth: addition to model/src and pkg/ctrl so allow
54     initialization of pkg/smooth and application to control vector
55    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
56    o dependencies: pkg/profiles requires pkg/cal
57    o pkg/profiles:
58     - added option ALLOW_PROFILES_GENERICGRID
59         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
60         that interpolation information (grid points and coefficients) is provided
61         within the netcdf input files.
62         -> sample matlab scripts can be found in MITgcm_contrib/gael
63         that allow you to prepare netcdf input files.
64     - also modified: cleaner include statements, cleaner error print statements,
65       cleaner stops when error, and more tests of the netcdf input files consistency.
66    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
67    o pkg/seaice:
68     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
69       requires a new routine: seaice_diagnostics_fill.F
70     - make sure that seaice does not move if not forced (pressure replacement
71       method, Hibler and Ip, 1995), changes results
72     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
73     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
74       It is turned off by default (=-1.), because it changes the results.
75     - make it possible to read AREA from a file, too.
76    
77    checkpoint59c
78    o add S/R and diagnostics for oceanic mixed-layer depth
79    o move GMRedi call after all vertical mixing schemes (including KPP)
80    o pkg/thsice:
81     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
82      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
83    o pkg/obcs:
84     - bug fix for balance code
85    o pkg/seaice:
86      - allow values of SEAICE_elasticParm > 1
87      - add new parameter SEAICE_evpTauRelax as an alternative
88        to SEAICE_elasticParm
89      - make lsr boundary conditions free slip (by default), changes result
90      - add code for no slip boundary conditions for lsr
91      - set minimum of zeta to zero (and not 4e8) (changes results)
92      - add a cap on AREA after advecting AREA if seaice_growth is not called
93    o change calculation of Visbeck K:
94      - no longer depend on tapering scheme; instead, compute slope (limited
95        by GM_maxSlope). this is equivalent to what was comuted before with
96        clipping or linear tappering.
97      - fix vertical averaging (wrong by 1/2 level)
98      - leave the old version (but will not be maintained) within
99        #ifdef OLD_VISBECK_CALC / #endif
100      - update output of exp. ideal_2D_oce
101    o change error catch in calc_r_star to improve vectorization
102    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
103      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
104    o adjoint:
105      Re-organized adjoint checkpointing according to Matt Mazloff
106      (but with modifs/completions/cleanups)
107      Storing is now bundled into large arrays to optimized I/O
108      (and second step in cleanup of the_main_loop)
109    
110    checkpoint59b
111    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
112      - export/import (between ocean & coupler) fields needed for ocean DIC.
113    o pkg/seaice:
114      - get rid of three more exchanges seaice_calc_viscosities (required
115        different loop boundaries in seaice_lsr and seaice_ocean_stress)
116      - bug fix in seaice_ocean_stress (update of lab_sea required)
117      - reduce loop boundaries to necessary minimum also in seaice_evp
118      - go back to the old way of computing deltaC/Z as the adjoint likes that
119        better
120    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
121      passive tracer to an Age Tracer) + update output.txt
122    o pkg/exf:
123      - implement A-grid / C-grid selection for wind-stress input files.
124      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
125      for now, in exf_bulk_largeyeager04.F only :
126      - change implementation for case where windspeed + 2. components wind-stress
127        are read-in. AND use rhoConstFresh to convert evap.
128    o pkg/seaice:
129      - use correct EXCH_UV for wind-forcing (on A-grid).
130      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
131        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
132    o pkg/exf:
133      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
134      EXF_INTERPOLATION:
135      - merge global_with_exf/code version of exf_interp_read.F
136        to the main code ;
137      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
138        reading the file ; Important: This options needs to be defined to recover
139        previous code.
140        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
141      - no longer loose real*8 precision along the way when using exf_iprec=64.
142    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
143      - change discretisation of evp-solver in order to avoid another exchange
144        (changes lab_sea) and clean up a little
145      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
146        help the adjoint (this also changes the results slightly)
147      - add a few "_d 0" where they had been missing in seaice_evp.F
148      - cleaning up: remove unused seaice_calc_rhs.F
149    o pkg/exf: some cleaning-up:
150      - change various "constants" into runtime parameters
151      - cleaned-up Large&Yeager04 routine which should eventually
152        replace exf_bulkformulae.F (changed names of S/R and CPP)
153        and merged various ALLOW_ATM_WIND options
154     only used with thsice pkg (in thsice_get_exf.F):
155      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
156        which are used when useStabilityFct_overIce=TRUE (= the default)
157      - change default values of ice & snow emissivity and scale downward LW
158        by ice & snow emissivity.
159    o pkg/thsice:
160     fix few little problems, in thsice_calc_thickn.F:
161      - growth vertically (and not laterally) if iceFrac == iceMaskMax
162      - melt only laterally if hIce < hThinIce (as the comments say)
163      and in thsice_extend.F:
164      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
165      - start to form ice as soon as the minimum ice-volume is reachable.
166     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
167      and cpl_aim+ocn
168    o pkg/kpp
169     - move computation of surface related input fields to KPP into a new
170       subroutine kpp_forcing_surf.F
171     - remove wrong (within bi,bj loops) EXCH calls.
172     - little cleaning (add argument myThid in last position, cvs header ...)
173     - for now, fix conservation problem by exchanging KPPviscAz (may not
174       be the best fix)
175    o pkg/seaice
176     - check for inconsistent evp parameter/cpp-flag combination
177     - remove leftover errIO flat for obsolete name list error handling
178    o OpenAD
179     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
180    
181    checkpoint59a
182    o pkg/seaice: some parameter clarifications and a little bit of clean up
183    o pkg/thsice: rename run-time parameters:
184       himin       -> hIceMin
185       himin0      -> hThinIce
186       hihig       -> hThickIce
187       i0          -> i0swFrac
188       transCoef   -> bMeltCoef
189       frac_energy -> fracMelting
190      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
191       with default values (for now) that do not change the results.
192      remove old version of thsice vars advection in pkg/seaice.
193    o in FFIELDS.h:
194      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
195      - make pLoad & sIceLoad always available (but still only used if
196         ATMOSPHERIC_LOADING is #define).
197    o pkg/kpp: replaced _KPP_RL with _RL
198    o bug fixes for vertical diffusivity computations when both KPP and
199        3D diffusivity arrays are used.
200    o pkg/seaice: fix bug in evp solver, while doing that
201      - change (improve?) discretization of stress computations for both
202        cgrid-lsr and evp solver
203      - add a new routine to compute strain rates
204      - the above changes lab_sea results
205      - add no slip conditions for evp solver (off by default), lsr-version
206        may follow
207      - fix exchange for shear at Z-points (does not change lab_sea)
208      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
209        (to force the user to pick a time step since there is not "safe" way
210        of choosing it)
211      - add principal stress diagnostics
212      - rearrange fields for evp a little to avoid having to call a: too many
213        exchanges and b: exchanges for stress trensor components which we do
214        not have.
215      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
216        of evp, complete rewrite for lsr case (latter is does not yet work
217        in all cases)
218    o pkg/kpp: add code to have mixing in shelf ice caverns
219      - add myThid to all kpp routines (long overdue)
220    
221    checkpoint59
222    o pkg/exf:
223      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
224        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
225      - move exf header files from lower_case.h to UPPER_CASE.h ;
226        add missing cvs Header & Name
227      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
228      - add namelist param. selectStressGridPosition, exf_monFreq
229      - retire many _CLIM routines, and remove data.exf_clim
230        + params moved to data.exf
231        + climsst, climsss now handled by exf_set_gen, i.e.
232          climss?period=0 refers to constant field,
233          climss?period=-12 to monthly forcing
234      - split up namelists in data.exf
235    o pkg/seaice:
236      - remove seaice_exch and seaice_exch_uv
237      - remove superfluous exchange of theta
238      - add myThid to seaice_budget_ocean/ice
239      - add new interface for atmospheric wind forcing (C-grid only)
240        + new routine
241        + two new field (taux, tauy for stress over ice)
242        + removed one global field (DAIRN) for C-grid case only
243    o pkg/thsise
244      - 2nd set of modifs for thsice adjoint in conjunction with exf
245    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
246    
247    checkpoint58y_post
248    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
249      vertical diffusivity, similar to that in MOM4; turned on using
250      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
251      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
252    o Added capability for 3D specification of background vertical diffusion
253      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
254      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
255      "data" file that contains the 3D vertical diffusivity coefficients.
256    o ice dynamics (pkg/seaice) with thsice thermodynamics:
257      - add code within pkg thsice to advect & diffuse sea-ice fields
258      similar to (and will replace) what has been added in  seaice_advdiff.F,
259      but: - conserving Mass, Heat & Salt.
260           - better when using non-linear advection scheme (not yet fully tested)
261           - can also be used in atmospheric set-up (for now, only the diffusion).
262    
263    checkpoint58x_post
264    o IO option for global-file compact format:
265      - add options when generating topology (utils/exch2/matlab-topology-generator)
266      - add I/O capability (pkg/mdsio).
267      - adapt utils/matlab/rdmds.m to read this format.
268      for now long-line format not yet supported by pkg/mdsio (& exch2).
269    o shelfice: add a few diagnostics
270    
271    checkpoint58w_post
272    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
273      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
274      (and replace horiVertRatio in NH code).
275      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
276                         and tutorial_plume_on_slope (sensitive to truncation)
277    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
278      directly to drive seaice model (C-grid only)
279    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
280     - reintroduce computation of wind from stress,
281     - compute tau (in exf_bulkformulae.F) from windstress averaged to
282       mass points to avoid tau = 0
283     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
284    o rdmnc.m: make it work with "global" files created with gluemnc
285    o rdmnc.m : some improvements in dealing with singleton dimension
286      (tested on all testreport mnc output files).
287    o genmake2: disable pkg/profiles if netcdf test fails.
288    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
289    o move call to cal_readparms up to make calendar parameters/variable available
290      to all packages
291    
292    checkpoint58v_post
293    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
294      useDynP_inEos_Zc tested.
295    o pkg/exf: changes to properly interpolate/mask/scale initial fields
296    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
297      and portions thereof.  See read_cs.txt for description and examples.
298    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
299      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
300      following the great-circle arc between those 2 points.
301    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
302      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
303    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
304     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
305     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
306     - still needs work (not working with some options ; efficiency to improve)
307       and serious testing.
308     - use this scheme for temperature & salinity in 2 advection test exp.:
309       advect_xy & advect_xz, respectively.
310    
311    checkpoint58u_post
312    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
313    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
314    o testreport: add option "-skipdir" to skip some test.
315    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
316      momentum calculation.
317    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
318    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
319      remove checkpoint.F and the_correction_step.F (no longer used);
320      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
321    o add option (linFSConserveTr) to correct for tracer source/sink due to
322      Linear Free surface
323    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
324    o pkg/thsice: fix reading mnc-pickups
325    
326    checkpoint58t_post
327    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
328    o pkg/mdsio:
329     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
330       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
331       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
332     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
333     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
334       either MDS_READ_FIELD or MDS_WRITE_FIELD )
335     - new S/R (to replace MDSWRITEMETA), which allows to write more
336       informations (variable names, time ...) to meta files.
337     - modify rdmds.m to give back the meta file content.
338    o pkg/diagnostics: change vertical interpolation to be safer, and more
339       flexible (define p-levels to interpolate to in data.diagnostics);
340      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
341       diagnostic pointer.
342    o pkg/seaice: more cleaning up of seaice_growth, added many comments
343    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
344    o fix multi-category seaice:
345     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
346       SEAICE_MULTICATEGORY
347     - fix short wave heat flux
348    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
349       and allow to use EVP solver. Change forward lab_sea: test both EVP
350       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
351    o Initial check-in of lab_sea adjoint
352      (very similar to natl_box_adjoint/code_seaice)
353      * used C-grid and EVP solver
354      * used KPP, GM/Redi
355      * uses inAdExact=.TRUE.
356      * gradient checks fail for both ADM and TLM
357        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
358        f.d. gradients actually seem more problematic than ADM, TLM gradients;
359        issue is related to forward mismatch between g77 an ifort
360    o pkg/seaice: overhaul of thermodynamics
361     - growth.F and groatb.F are replaced by new routine seaice_growth.F
362     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
363     - move a few global fields out of SEAICE.h into seaice_growth.F and
364       make them 2D (FICE/QNETO/ ...)
365     - remove FO (it is the same as QNETO)
366     - introduce a few local fields to avoid modifying external fields such
367       as atemp, etc.
368    
369    checkpoint58s_post
370    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
371      changed exf_set_gen.F so that
372        genperiod=0 means input file is one time-constant field and
373        genperiod=-12 means input file contains 12 monthly means
374    o CG2D: use pre-computed solver main-diagonal (stored in common block);
375      this affects truncation error ; generate new output file for exp. which
376      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
377        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
378        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
379        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
380        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
381        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
382    o start implementation of deep-atmosphere and anelastic formulation
383    o verification: remove 2nd copy of input files and use script "prepare_run"
384      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
385    o mom_common/vecinv/fluxform: fix a few initialisation isssues
386    o profiles: fix for multithreaded case
387    
388    o diagnostics: rename few diags:
389      s/'PRESSURE'/'RCENTER '/g
390      s/'TICE    '/'oceFreez'/g
391      s/'TAUX    '/'oceTAUX '/g
392      s/'TAUY    '/'oceTAUY '/g
393      s/'SWFLUX  '/'oceQsw  '/g
394      s/DIFx/DFxE/g
395      s/DIFy/DFyE/g
396      and add few ocean-forcing diagnostics:
397      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
398    o modifications to pkg/seaice/growth.F and budget.F, which change results of
399      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
400      as actual snow thickness.  It now refers everywhere to effective snow
401      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
402    
403    checkpoint58r_post
404    o modifications to pkg/seaice/growth.F, which change results of
405      lab_sea experiment: fixes pertain to melting snow over open water, to
406      masking EVAP under sea ice, and to using the correct AREA variable for
407      computations of EVAP, PRECIP, HSNOW, and GHEFF
408    o add ability to read bathy, salt, and theta using MNC (off by def)
409    o add flooding algorithm and advection of HSNOW for pkg/seaice;
410      both are turned off by default and do no change any results
411    o seaice advection with pkg/thsice: a step toward the use of non-linear
412      advection scheme, but #ifdef or commented out for now (requires more EXCH).
413    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
414      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
415      in natl_box (affects results @ truncation level: update output.txt)
416    o multi-threading and IO:
417      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
418      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
419        (needed to work with SingleCpuIO): tested in all verif. exp.
420    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
421      affects the results (but none of the verification test uses this scheme).
422    o Adding some pkg/diagnostics capability to pkg/seaice
423      (will certainly be subject to changes)
424    o ctrl: adding new control variables:
425      lwflux, lwdown, evap, snowprecip, apressure, runoff
426    
427    checkpoint58q_post
428    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
429      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
430      high_res_cube configuration by 4% on Columbia.
431    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
432      add (in global_with_exf/code) a version of EXF_INTERP_READ without
433      dynamical allocation (seems to work in multi-threaded).
434    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
435      single CPU io) so that TAF does not have to see EESUPPORT.h
436    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
437    
438    checkpoint58p_post
439    o obcs: stop if obcs is used with useCDscheme = .true.
440    o shelfice:
441     - fix a sign error so that no slip at shelfice interface works
442     - remove stop for combination non-hydrostatic code and shelfice. That does
443       not mean, that the results are correct, but at least they are numerically
444       stable
445    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
446    o added adjoint exch routined for all exch*3d* routines
447      and updated flow directives
448    
449    checkpoint58o_post
450    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
451      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
452    o change controling S/R for writing pickup file (new S/R do_write_pickup)
453      and clean-up reading/writing of pickup files.
454    o fix local version of read/write pickup (NH part) in rotating_tank/code
455    o simplify EXCH interface:
456     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
457     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
458    o added the regrid package
459    o shelfice:
460     - add a simple boundary layer scheme to reduce noise
461     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
462    
463    checkpoint58n_post
464    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
465       local variable (not in common block).
466    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
467      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
468      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
469        to work with SingleCpuIO.
470    o add "_d 0" to real constant of pkg/cfc subroutines ;
471       update exp. cfc_exemple & tutorial_cfc_offline output files.
472    o multi-threading and IO:
473      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
474        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
475      - barrier before and after reading.
476      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
477      - avoid using MDS_WRITELOCAL for LAND pkg output.
478      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
479        common-block variables ; Allows multi-threading with master-thread IO.
480    o change default MAX_NO_THREADS from 32 to 4 ;
481      and stop cleanly when MAX_NO_THREADS is too small.
482    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
483    
484    checkpoint58m_post
485    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
486       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
487    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
488       keep global_ocean.90x40x15 (for AD testing) with former secondary test
489       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
490    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
491        add MITgcm_tutorials (= code + all the tutorials)
492    o ecco, option to compute cost for total ssh (mean+anom)
493    o consistent with addition of ptracer and ssh in pkg/profiles
494    o profiles: adding ptracer and ssh
495    o testreport: change multi-test output-file name
496      (from output.txt.{name} to output.{name}.txt)
497    o profiles: now ok for mutli-tiles case
498    o seaice: add 4 parameters for different advection schemes for area,
499      (effective) seaice thickness, enthalphy, and snow height. Their default
500      is the standard parameter SEAICEadvScheme
501    o calc_gw:
502     - add cosFacU in zonal viscous flux (harmonic.visc.).
503     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
504       of tutorial_plume_on_slope.
505    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
506    o calc_gw: true flux-form, account for horizontal grid spacing.
507      update rotating_tank results, but not plume_on_slope (affected at
508      truncation level, 11 digits).
509    
510    checkpoint58l_post
511    o calc_gw:
512     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
513     - remove side-drag for now (need to fix it); update plume_on_slope results.
514     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
515    o commit code to make SST/SSS weights spatially variable
516      (based on either variable in-situ or variable initial T/S weights)
517    o pkg/ecco:
518      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
519        now based on horizontally varying weights wthetaLev, wsaltLev
520      * cost_averagesflags now returns year indices in addition to day, month
521      * sflux balance is performed on annual basis
522        (sflxumm, sfluxmm2, bal_sfluxmm)
523      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
524        including separate counting and multipliers
525    o pkg/rbcs
526      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
527    
528    checkpoint58k_post
529    o testreport:
530     - always build in dir. "build" (if not there, mkdir build instead of building
531       & running in input)
532     - run in dir run (if it exists), in build otherwise.
533     - call prepare_run (if input/prepare_run exists)
534     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
535    o pkg/exf modifications to interpolation and rotation routines for more
536       reasonable treatment of North Pole singularity: for tracers North Pole
537       value is set to northernmost zonal-mean value, for zonal velocity it is
538       set to zero, and for meridional velocity it is set to northernmost value.
539    o pkg/exf/exf_check_range.F
540     - add tile index to diagnostics and move stop statement to the very
541       end of the routine.
542    o pkg/diagnostics: (diagnostics_main_init.F)
543      define title of isomorphic variables according to the current config.
544    o pkg/thsice with pkg/seaice dynamics:
545    - fix domain of computation (interior only, required for exf) and do exchanges
546    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
547    o towards a standard way of dealing with multi-threading in MONITOR
548      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
549    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
550       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
551    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
552    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
553    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
554       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
555    o tracer advection:
556     - clean-up and simplify calc_common_factors.F
557     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
558       advection subroutine (but still not used within DST advection S/R)
559    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
560    
561    checkpoint58j_post
562    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
563      from file (collects calls previously in FORWARD_STEP)
564    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
565    o adjoint store dir. adjusted accordingly
566    o genmake2
567      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
568    
569    checkpoint58i_post
570    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
571      on wind stress (SEAICEstressFactor defaults to 1.)
572    o Total number of Timers is finite (<=40): comment out 2 non-essential one
573      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
574    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
575      on CS-grid: no longer loosing mass.
576    o exf & curvilinear-grid: no longer modify longitude xC & xG.
577    o pkg/ggl90: fix sloppy output and fix a bug
578    o pkg/seaice: added SEAICEuseEVPpickup parameter
579      - Set to false in order to start EVP solver with
580        non-EVP pickup files when using SEAICEuseEVP
581      - fix sign error in diffusion in seaice_calc_rhs
582    
583    checkpoint58h_post
584    * Modifications for bottom topography control
585      o replace hFacC by _hFacC at various places
586      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
587      o add non-self-adjoint cg2d_nsa
588      o update autodiff support routines
589      o re-initialise hfac after ctrl_depth_ini
590      o works for 5x5 box, doesnt work for global_ocean.90x40x15
591    * Adding verification for 5x5 box (4-layer) bottom topography control
592    
593    checkpoint58g_post
594    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
595       used for mean seasonal cycle, mean diurnal cycle); add an example
596       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
597    o pkg/ggl90:
598      - add parameter (minimum surface kinetic energy)
599      - fix bug (avoiding division by zero)
600    o couple pkg/thsice to pkg/seaice:
601      - modify advection in seaice to accomodate new scalar fields to be advected
602      - only muliDimAdection scheme work with seaice/thsice
603      - mapping of thsice-variables to seaice-variables, back and forth
604      - does not break the verification experiments, but does not give the
605        desired results either
606    o pkg/seaice
607      - make (default) second order advection a bit less confusing?
608    
609    checkpoint58f_post
610    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
611      to pkg/seaice):
612      - new routines thsice_map_exf and thsice_get_exf provide the interface
613      - add an additional formal parameter to thsice_solve4temp
614    o pkg/exf:
615      - add new fields wspeed, snowprecip (to be able to couple to thsice)
616      - correct Stefan-Boltzmann constant
617      - new parameter for longwave surface emittance
618      - separate some stuff from exf_bulkformulae into new routines  
619        exf_radiation, exf_wind
620      - add new parameters and constants: longwave emissivity for ocean, ice
621        and snow, evaporation parameters over ice
622      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
623        either wind from stress or stress from wind
624    o pkg/thSIce:
625    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
626    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
627       and THSICE_CALC_THICKN
628    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
629    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
630      to make debugging easier.
631    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
632    o pkg/bulk_force:
633      - clean-up comments and parameters ;
634      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
635    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
636      generate new output for test-experiment: aim.5l_cs.thSI
637    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
638      testreport accordingly
639    
640    checkpoint58e_post
641    o SEAICE_CGRID adjoint done
642    o R_STAR adjoint implemented.
643      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
644      * need to sort out init. of h0facc, etc.
645    o Make pkg/profile fully independent of ecco,cost, etc. stuff
646      to be able to use it in pure forward.
647    
648    checkpoint58d_post
649    o upgrade simple test-experiment to tutorial example:
650     step.1: duplicate the experiment and (step.2) will remove the old copy.
651      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
652      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
653      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
654      tutorial_global_oce_biogeo    <- copy of dic_example
655      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
656      tutorial_plume_on_slope       <- copy of plume_on_slope
657      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
658      tutorial_global_oce_optim     <- empty for now (David ?)
659      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
660     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
661    o correct a sign problem in cost_scat.F
662    o obcs and ptracers: fix boundary conditions for advections schemes
663      with larger stencil
664    o thsice adjoint: start
665    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
666      completeness
667    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
668      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
669    o ptracers adjoint:
670      * avoid extensive recomputatations
671      * fix missing re-init. of gptr (missed by TAF)
672    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
673      me to turn off the excessive output to STDOUT that this package produces
674    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
675      and add those terms in Vector-Invariant formulation.
676    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
677      if the control period (xx_hfluxperiod etc) is 0
678    o in profiles pkg, clean routines and fix details
679    o in ecco pkg, reading ssh data:
680      fix problem in case the model does not start at iter0=0
681    o fix mnc-pickup/restart for ptracers
682    o new package prifiles:
683      code to compute profile-based cost by Gael Forget
684      (modifs in ecco, ctrl, autodiff)
685    o Benign bug fix in initialization (spotted by M. Mazloff) of
686      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
687    
688    checkpoint58c_post
689    o adjoint: finish NLFS adjoint and provide reference output in
690      verification/global_ocean.90x40x15/results_ad_nlfs
691    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
692      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
693      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
694      with SEAICE_CGRID defined.
695    o move calendarDumps from "data" to "data.cal" and clean-up the code
696      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
697    o add useEXF & useCAL flags (for now, set in hard-coded way)
698    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
699      (were missing in NH mode, and wrong in quasihydrostatic mode).
700      waiting for Chris updated version of calc_gw to add those CALLs.
701    o fix bug in quasihydrostatic S/R ;
702      add a test for this option: global_ocean.90x40x15.qshyd
703    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
704      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
705    o add on/off flag useOffLine for package OFFLINE
706    o seaice:
707      - modify advection so that it works also on the C-grid
708      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
709        problem in multi-tile runs with C-grid
710      - add flags for clipping ice velocities and/or masking solver forcing
711      - fix drag (ocean on ice) formulation and a bug that caused noise in the
712        C-grid solver
713      - added a few comments to seaice_diffusion.F
714      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
715        are now exclusive)
716      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
717        required re-ordering the code a little:
718       + make DAIRN global variable (defined in SEAICE)
719       + move computation of the viscosities eta and zeta into a new separate
720         routine (because I need to recompute them in seaice_ocean_stress.F)
721    
722    checkpoint58b_post
723    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
724      update output.txt of exp. aim.5l_cs.thSI
725    o various mnc cleanups and improvements:
726      + shrink lookup tables by factor of ~4
727      + better error reporting when running out of lookup space
728      + able to handle longer path/file names (up to 500 chars)
729    o adjoint:
730      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
731      - TBD: "hidden" mom_vecinv recomp. in dynamics
732    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
733     (allow to differentiate between forcing components using new integer flags:
734      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
735     and add new flag to put Dissipation tendency out of Adams-Bashforth.
736    o ecco
737      - enable trend removal from SSH anomaly obs.
738    o adjoint
739      - a fix for PmEpR when #undef EXACT_CONSERV
740      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
741      - try to fix "hidden" recomp. in forward_step for NLFS
742        (NLFS seems broken sometimes after I checked it in)
743    o seaice:
744     - add c-grid version of the dynamic solver:
745       + three new routines that are the c-grid substitute lsr, dynsolver
746         and ostres
747       + put a few fields that were local to dynsolver into global common
748         blocks, so that I can move the computation of stresses etc into
749         seaice_lsr (saves coding but may break the adjoint).
750     - replace more hardwired parameters by runtime parameters
751     - add ice masks that mask the rhs of the implicit solvers where there
752       is no ice (commented out in seaice_dynsolver, because i am not sure
753       if this works properly), eventually this should replace the clipping
754       of ice velocities in seaice_dynsolver to +/-40cm/s.
755    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
756      include it only where its needed
757    o move balancing of fluxes before the call of external_forcing_surf
758    o seaice:
759      - correct units of turning angles (now they are really in degrees)
760      - move computation of GWATX/Y out of main routine into dynsolver
761      - initialize GWATX/Y in seaice_init
762    o Apply mask on Fresh-Water flux (needed for SSH forcing).
763      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
764    o seaice: add runtime flags for turning angles (default to zero)
765    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
766      and trend from exf forcing and ctrl control adjustments
767    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
768      (since checkpoint57x_post)
769    o change the default rotation period to 86164.s = the Earth rotation
770    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
771      and based on a reference stratification. Tested within hs94.cs-32x32x5.
772    o seaice advection: add code for choosing between the default (2nd order
773      central differences) and multiDim advection schemes provided by
774      pkg/generic_advdiff
775    o seaice:
776      - removed all references to SEAICE_GRID.h fields from
777        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
778        (cubed-sphere configuration will change a little)
779      - grid computations in seaice_init are obsolete now.
780      - cleaned up code a little so that is easier to read (hopefully).
781      - added new (better?) discretizations of default advection and diffusion
782        (turn on with SEAICEuseFluxForm)
783      - replace 1 in 3d global fields by kSurface in growth.F
784      
785    checkpoint58a_post
786    o seaice:
787      - bug fix in advect.F
788    o shelfice:
789      - separate shelfice load anomaly from pload (breaks with time
790        dependent forcing), => introduce constant field shelficeLoadAnomaly.
791        Its default is 0., but it may be computed more cleverly from (unknown)
792        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
793        done offline. A good approximation of the pressure load anomaly is
794        necessary to avoid large initial adjustment processes underneath
795        deep-reaching shelfice.
796      - small fix in ISOMIP shelfice_thermodynamics
797      - add more sophisticated thermodynamics of Hellmer (1989), this is
798        now the default
799      - give a few constants more intuitive names
800    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
801      if bulk formulae are used in long integration (especially EmPmR). Turn
802      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
803      if balancePrintMean, the imbalance that is substracted is printed to
804      STDOUT.
805    o fix bug (typo) in obcs_apply_eta.F
806    o add a new package shelfice which enables us to model the circulation
807      underneath shelf-ice with draughts of hundreds of meters.
808     - works
809     - to do: + include improved thermodynamics
810              + check whether kSurfC (from model/inc/SURFACE.h) can be used
811                instead of new field kTopC
812              + can we use topoFile, Ro_surf and existing code in ini_depth.F
813                instead of new field R_shelfIce and new code in ini_depth.F
814                and ini_mask_etc.F?
815              + adjust vertical mixing schemes?
816    o seaice pkg:
817     - add a cpp-flag to include a simple formula for a salinity dependent
818       freezing point of sea water at the surface
819     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
820       meridional stresses are now different (and hopefully correct)
821    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
822       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
823       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
824    o pkg/diagnostics: add options and parameters for regional-statistics
825       diagnostics ; define regions by reading a region-mask from a file
826       (might add other options later)
827    o pkg/bulk_force:
828     - add option and parameters to use AIM surface-flux formulae.
829     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
830       others forcing fields (defined in PARM05, parameter file "data") are loaded
831       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
832     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
833     - use the right EXCH call for uwind,vwind (to work on CS-grid).
834     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
835       and parameters (note: calcWindStress replaces .NOT.readwindstress).
836     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
837    
838    checkpoint58
839    o add "--embed-source" option to genmake2 which, when the supporting
840      tools can be compiled (as determined by genmake2) will turn on the
841      embed_files package which then embeds the entire MITgcm source code
842      (*.[fFhc] + Makefile) used for the build within the executable
843      - requested by CNH but off by default
844      - adds a paltry <9MB to the mitgcmuv executable in most cases
845      - only writes the output when useEMBEDSRC in eedata is true
846    o clean up 3-dim. relaxation codes:
847      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
848      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
849      * Thanks to Tom Haine for testing!
850    
851    checkpoint57z_post
852    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
853      affects output (@ truncation level) of exp. plume_on_slope ; updated.
854    o fix the pickup behavior for obcs in combination with ptracers
855    o fix a bug in ptracers_external_fields_load
856    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
857      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
858    o transfered surface NH pressure to eta field (if exactConserv).
859    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
860         and update lab_sea output.txt file.
861    o completing 3-dim. relaxation code: additional term
862         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
863      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
864      * At compile time, in "EXF_OPTIONS.h" set
865          #define  ALLOW_CLIMTEMP_RELAXATION
866          #define  ALLOW_CLIMSALT_RELAXATION
867      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
868          tauThetaClimRelax3Dim = 15552000.0,
869          tauSaltClimRelax3Dim  = 15552000.0,
870      * 3 cases:
871          1) Use a constant-in-time 3-dim. field
872          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
873          3) Real-time relax. to time-evolving prescribed field
874    o Adding Laplacian-type smoothness constraint on
875      initial and boundary (forcing) controls (ic, bc)
876      * enable at compile-time via
877        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
878      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
879      * Absolute scale somewhat unclear so far
880      * no area weighting was included since no other cost term does so far
881    
882    checkpoint57y_post
883    First step for a NLFS adjoint
884    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
885    o new init. routines for calc_r_star, calc_surf_dr
886    o still need to deal with ini_masks_etc
887    o testreport seemed happy
888    checkpoint57y_pre
889    
890    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
891    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
892    o add new offset feature to offline pkg (plus minor cleanup)
893    o cfc fixes for final year of integration
894    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
895      be in GCHEM_OPTIONS).
896    
897    checkpoint57x_post
898    o fix testreport Pb in multiple test experiment.
899    o cleanup our namelist syntax in verification:
900      - make it more F95 standards compliant (some work still needed)
901      - allows the vast majority of our tests to work with gfortran
902    o Non-Hydrostatic:
903     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
904     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
905    o Allow to apply AB on T,S rather than on AB(gT,gS):
906     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
907     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
908       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
909     - need a "clever" read_pickup to restart from the other AB formulation
910    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
911    o remove some unused variables (reduces number of compiler warnings)
912    o adjoint
913      * Disable useVariableViscosity for adjoint for time being
914        (there are a number of extensive recomputations)
915      * Initialize certain variables needed for adjoint
916    
917    checkpoint57w_post
918    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
919                 fix the singleCpuIO RS version of MDSWRITEFIELD
920       and add a WARNING if using globalFiles=T with multi-processors.
921    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
922      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
923    o tracer advection scheme:
924      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
925       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
926       was not very convenient).
927      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
928       (further tests needed for the implicit DST & Flux-Limiter schemes).
929    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
930      and sRef for convenience, handy, when you want to initialize
931      ptracers in a large domain with a constant non-zero value. Also,
932      untangle ptracers_init.F a little.
933    
934    checkpoint57v_post
935    o change dome exp. to use variable viscosity in side-drag terms.
936    o remove all the files from the cfc_offline test since they are now
937      incorporated into tutorial_cfc_offline which has been producing
938      identical results for a few days of testing
939    o add new parameter: sideDragFactor to enable half-slip-side BC
940      and change side-drag S/R to use viscosity from mom_calc_visc
941      (can switch back by setting sideDragFactor=0.); affects results at
942      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
943       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
944    o vorticity & strain are now computed without masking, to account for
945      no-slip-side BC in variable viscosity calculation ; mask is applied
946      anyway later on, before computing advection/coriolis terms.
947    o modify exp4 to test new obcs support for reading from external files
948      and for passive tracers
949    o fix behavior of ptracers_monitor when monitor output is written to a
950      netcdf-file; still not independent of monitor.F (writes in the same
951      file).
952    o change default value of tRef (put a uniform, meaningful value for ocean
953      & atmos) and initialize sRef (was missing, as Martin mentioned).
954    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
955      to be proportional to enstrophy dissipation length.  Thus,
956       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
957      This is now consistent with Smagorinsky and with the manual.
958    
959    checkpoint57u_post
960    o OBCS and PTRACERS: add open boundary support for passive tracers
961      - either use homogenous (pseudo) v.Neumann conditions or prescribe
962        OB-values from file; this is not different from the way theta and salinity
963        are treated
964      - however, Orlanski-radiation conditions are not supported, and the model
965        will stop if you use pTracers and Orlanski at the same time.
966      - beefed up the rountine obcs_external_fields_load: now only those open
967        boundary values are overwritten with values from files for which there
968        are really files, otherwise the OB-fields remain untouched. This makes
969        it possible to use different OBs at different ends of the domain (as
970        with EXF)
971    o reduce number of exch calls in shap_filt (s2).
972    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
973      truncation level) 4/5 MLAdjust test results (11&12 digits match).
974    
975    checkpoint57t_post
976    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
977    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
978      same truncation, independent of the face number: affects affects several
979      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
980    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
981      note that biharmonic viscosity + no-slip was not tested in any experiment.
982    o fix bug in non-linear free-surf side-drag ; generate new output for
983      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
984    o make mnc honor the writeBinaryPrec flag for most kinds of output
985    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
986    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
987      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
988    o add brackets in multi-terms sum to get same truncation, independent of
989      the face number (manage to get exactly same value of gU,gV at the cs-edge)
990      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
991    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
992      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
993      a maximum grid-scale Reynolds number.  Also, changes all length calculations
994      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
995      Suggested values of viscosity parameters found in mom_calc_visc.
996      Many new viscosity diagnostics available.
997    
998    checkpoint57s_post
999    o Add clearing-house for viscosity calculations, mom_calc_visc and
1000      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1001      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1002      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1003      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1004      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1005      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1006      ViscAhStrain and viscAhTension are now retired.
1007    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1008    o In response to JMC's bug report, genmake2 now ignores any soft-links
1009      that it finds in the *current* directory when searching for files.
1010      Soft-links found in any other source directories will still work as
1011      they did before.
1012    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1013      a C routine to unlimit the stack size
1014    o mnc-ify pkg/aim snapshot vars
1015    o mnc-ify pkg/land as requested by Daniel
1016    o various changes to mnc including:
1017      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1018      - output can now be grouped so that all files within a group
1019          change the ITER portion of their names in lock-step together
1020      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1021          and works with both EXCH1 and EXCH2 (but needs more testing)
1022      - writing works for all verification test cases w/ g77 on Linux
1023    
1024    checkpoint57r_post
1025    o make MNC variable initialization happen earlier
1026    o add diagnostics for (almost) each term of the momentum Eq.
1027    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1028    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1029    o remove MINIMAL_TAVE_OUTPUT option ;
1030      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1031    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1032      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1033    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1034    o add time-dependent SST, SSS control
1035    o cost terms in ecco/ modularized (new cost_generic.F)
1036    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1037    o new infrastructure for seaice model vs. obs misfits in seaice/
1038      * driver from the_main_loop.F is seaice_cost_driver.F
1039      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1040      * gradient check in Exp. 6a of natl_box_adjoint/
1041    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1042      (see README file)
1043    
1044    checkpoint57q_post
1045    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1046    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1047      - bug was reported by Jean-Michel and Ian Fenty
1048    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1049      update exp. cpl_aim+ocn output.
1050    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1051      Needed for high-res. runs with large global files
1052      to be able to limit tapelev size
1053    o Changed some tests for adjoint:
1054      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1055      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1056      * global_ocean.90x40x15/ back to default 3-level checkpointing
1057    o Modifications to enable scripted COMMON to MODULE conversion
1058      * verification/OpenAD/code/ has necessary scripts and description;
1059      * converts, compiles and runs successfully;
1060    
1061    checkpoint57p_post
1062    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1063    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1064      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1065    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1066    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1067      (was already the case for dissipation with mom_vecinv,
1068       and also the case for grad.PhiHyd when staggered-timeStep)
1069      This will allow to put dissipation out-off the AB time-stepping.
1070     Unfortunately, affects truncation error. Update output of exp. that "fails"
1071      (cg2d matching number) and leave the others for later: front_relax(10),
1072      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1073      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1074    
1075    checkpoint57o_post
1076    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1077      (2) its ready to be documented during the 20050801 DocFest
1078    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1079      for ideal_2D_oce and lab_sea on linux_ia32_g77
1080    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1081      in global1x1_tot/code_seaice_adj to access indices 32, 33
1082      (worth another tag)
1083    
1084    checkpoint57n_post
1085    o adding precip control xx_precip 32
1086    o adding swflux control xx_swflux 33
1087    o Replacing 10 forcing penalty cost routines by 1 generic.
1088    o Implementing partitioning in time-mean and variable adjustment
1089      for atmos. state.
1090    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1091  o in natl_box_adjoint:  o in natl_box_adjoint:
1092    * updated: results_bulk/    * updated exp 1 to 10
1093    * not yet updated: results/, results_seaice/      (but does not have time-mean vs. variable split results yet)
1094    o updated global1x1/*_seaice_adj/
1095      to incorporate latest changes
1096    o enable useSingleCpuIO for mdsio vector routines
1097      (applies in particular to tapelev I/O)
1098    o removed inefficient K-loop in all active_file*control*.F
1099    
1100  checkpoint57m_post  checkpoint57m_post
1101  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)

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