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revision 1.75 by jmc, Thu Jun 20 23:52:03 2002 UTC revision 1.837 by mlosch, Sun Jun 17 09:22:06 2007 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
8    o dependencies: pkg/profiles requires pkg/cal
9    o pkg/profiles:
10     - added option ALLOW_PROFILES_GENERICGRID
11         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
12         that interpolation information (grid points and coefficients) is provided
13         within the netcdf input files.
14         -> sample matlab scripts can be found in MITgcm_contrib/gael
15         that allow you to prepare netcdf input files.
16     - also modified: cleaner include statements, cleaner error print statements,
17       cleaner stops when error, and more tests of the netcdf input files consistency.
18    
19    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
20    o pkg/seaice:
21     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
22       requires a new routine: seaice_diagnostics_fill.F
23     - make sure that seaice does not move if not forced (pressure replacement
24       method, Hibler and Ip, 1995), changes results
25     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
26     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
27       It is turned off by default (=-1.), because it changes the results.
28     - make it possible to read AREA from a file, too.
29    
30    checkpoint59c
31    o add S/R and diagnostics for oceanic mixed-layer depth
32    o move GMRedi call after all vertical mixing schemes (including KPP)
33    o pkg/thsice:
34     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
35      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
36    o pkg/obcs:
37     - bug fix for balance code
38    o pkg/seaice:
39      - allow values of SEAICE_elasticParm > 1
40      - add new parameter SEAICE_evpTauRelax as an alternative
41        to SEAICE_elasticParm
42      - make lsr boundary conditions free slip (by default), changes result
43      - add code for no slip boundary conditions for lsr
44      - set minimum of zeta to zero (and not 4e8) (changes results)
45      - add a cap on AREA after advecting AREA if seaice_growth is not called
46    o change calculation of Visbeck K:
47      - no longer depend on tapering scheme; instead, compute slope (limited
48        by GM_maxSlope). this is equivalent to what was comuted before with
49        clipping or linear tappering.
50      - fix vertical averaging (wrong by 1/2 level)
51      - leave the old version (but will not be maintained) within
52        #ifdef OLD_VISBECK_CALC / #endif
53      - update output of exp. ideal_2D_oce
54    o change error catch in calc_r_star to improve vectorization
55    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
56      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
57    o adjoint:
58      Re-organized adjoint checkpointing according to Matt Mazloff
59      (but with modifs/completions/cleanups)
60      Storing is now bundled into large arrays to optimized I/O
61      (and second step in cleanup of the_main_loop)
62    
63    checkpoint59b
64    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
65      - export/import (between ocean & coupler) fields needed for ocean DIC.
66    o pkg/seaice:
67      - get rid of three more exchanges seaice_calc_viscosities (required
68        different loop boundaries in seaice_lsr and seaice_ocean_stress)
69      - bug fix in seaice_ocean_stress (update of lab_sea required)
70      - reduce loop boundaries to necessary minimum also in seaice_evp
71      - go back to the old way of computing deltaC/Z as the adjoint likes that
72        better
73    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
74      passive tracer to an Age Tracer) + update output.txt
75    o pkg/exf:
76      - implement A-grid / C-grid selection for wind-stress input files.
77      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
78      for now, in exf_bulk_largeyeager04.F only :
79      - change implementation for case where windspeed + 2. components wind-stress
80        are read-in. AND use rhoConstFresh to convert evap.
81    o pkg/seaice:
82      - use correct EXCH_UV for wind-forcing (on A-grid).
83      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
84        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
85    o pkg/exf:
86      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
87      EXF_INTERPOLATION:
88      - merge global_with_exf/code version of exf_interp_read.F
89        to the main code ;
90      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
91        reading the file ; Important: This options needs to be defined to recover
92        previous code.
93        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
94      - no longer loose real*8 precision along the way when using exf_iprec=64.
95    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
96      - change discretisation of evp-solver in order to avoid another exchange
97        (changes lab_sea) and clean up a little
98      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
99        help the adjoint (this also changes the results slightly)
100      - add a few "_d 0" where they had been missing in seaice_evp.F
101      - cleaning up: remove unused seaice_calc_rhs.F
102    o pkg/exf: some cleaning-up:
103      - change various "constants" into runtime parameters
104      - cleaned-up Large&Yeager04 routine which should eventually
105        replace exf_bulkformulae.F (changed names of S/R and CPP)
106        and merged various ALLOW_ATM_WIND options
107     only used with thsice pkg (in thsice_get_exf.F):
108      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
109        which are used when useStabilityFct_overIce=TRUE (= the default)
110      - change default values of ice & snow emissivity and scale downward LW
111        by ice & snow emissivity.
112    o pkg/thsice:
113     fix few little problems, in thsice_calc_thickn.F:
114      - growth vertically (and not laterally) if iceFrac == iceMaskMax
115      - melt only laterally if hIce < hThinIce (as the comments say)
116      and in thsice_extend.F:
117      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
118      - start to form ice as soon as the minimum ice-volume is reachable.
119     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
120      and cpl_aim+ocn
121    o pkg/kpp
122     - move computation of surface related input fields to KPP into a new
123       subroutine kpp_forcing_surf.F
124     - remove wrong (within bi,bj loops) EXCH calls.
125     - little cleaning (add argument myThid in last position, cvs header ...)
126     - for now, fix conservation problem by exchanging KPPviscAz (may not
127       be the best fix)
128    o pkg/seaice
129     - check for inconsistent evp parameter/cpp-flag combination
130     - remove leftover errIO flat for obsolete name list error handling
131    o OpenAD
132     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
133    
134    checkpoint59a
135    o pkg/seaice: some parameter clarifications and a little bit of clean up
136    o pkg/thsice: rename run-time parameters:
137       himin       -> hIceMin
138       himin0      -> hThinIce
139       hihig       -> hThickIce
140       i0          -> i0swFrac
141       transCoef   -> bMeltCoef
142       frac_energy -> fracMelting
143      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
144       with default values (for now) that do not change the results.
145      remove old version of thsice vars advection in pkg/seaice.
146    o in FFIELDS.h:
147      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
148      - make pLoad & sIceLoad always available (but still only used if
149         ATMOSPHERIC_LOADING is #define).
150    o pkg/kpp: replaced _KPP_RL with _RL
151    o bug fixes for vertical diffusivity computations when both KPP and
152        3D diffusivity arrays are used.
153    o pkg/seaice: fix bug in evp solver, while doing that
154      - change (improve?) discretization of stress computations for both
155        cgrid-lsr and evp solver
156      - add a new routine to compute strain rates
157      - the above changes lab_sea results
158      - add no slip conditions for evp solver (off by default), lsr-version
159        may follow
160      - fix exchange for shear at Z-points (does not change lab_sea)
161      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
162        (to force the user to pick a time step since there is not "safe" way
163        of choosing it)
164      - add principal stress diagnostics
165      - rearrange fields for evp a little to avoid having to call a: too many
166        exchanges and b: exchanges for stress trensor components which we do
167        not have.
168      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
169        of evp, complete rewrite for lsr case (latter is does not yet work
170        in all cases)
171    o pkg/kpp: add code to have mixing in shelf ice caverns
172      - add myThid to all kpp routines (long overdue)
173    
174    checkpoint59
175    o pkg/exf:
176      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
177        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
178      - move exf header files from lower_case.h to UPPER_CASE.h ;
179        add missing cvs Header & Name
180      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
181      - add namelist param. selectStressGridPosition, exf_monFreq
182      - retire many _CLIM routines, and remove data.exf_clim
183        + params moved to data.exf
184        + climsst, climsss now handled by exf_set_gen, i.e.
185          climss?period=0 refers to constant field,
186          climss?period=-12 to monthly forcing
187      - split up namelists in data.exf
188    o pkg/seaice:
189      - remove seaice_exch and seaice_exch_uv
190      - remove superfluous exchange of theta
191      - add myThid to seaice_budget_ocean/ice
192      - add new interface for atmospheric wind forcing (C-grid only)
193        + new routine
194        + two new field (taux, tauy for stress over ice)
195        + removed one global field (DAIRN) for C-grid case only
196    o pkg/thsise
197      - 2nd set of modifs for thsice adjoint in conjunction with exf
198    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
199    
200    checkpoint58y_post
201    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
202      vertical diffusivity, similar to that in MOM4; turned on using
203      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
204      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
205    o Added capability for 3D specification of background vertical diffusion
206      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
207      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
208      "data" file that contains the 3D vertical diffusivity coefficients.
209    o ice dynamics (pkg/seaice) with thsice thermodynamics:
210      - add code within pkg thsice to advect & diffuse sea-ice fields
211      similar to (and will replace) what has been added in  seaice_advdiff.F,
212      but: - conserving Mass, Heat & Salt.
213           - better when using non-linear advection scheme (not yet fully tested)
214           - can also be used in atmospheric set-up (for now, only the diffusion).
215    
216    checkpoint58x_post
217    o IO option for global-file compact format:
218      - add options when generating topology (utils/exch2/matlab-topology-generator)
219      - add I/O capability (pkg/mdsio).
220      - adapt utils/matlab/rdmds.m to read this format.
221      for now long-line format not yet supported by pkg/mdsio (& exch2).
222    o shelfice: add a few diagnostics
223    
224    checkpoint58w_post
225    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
226      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
227      (and replace horiVertRatio in NH code).
228      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
229                         and tutorial_plume_on_slope (sensitive to truncation)
230    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
231      directly to drive seaice model (C-grid only)
232    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
233     - reintroduce computation of wind from stress,
234     - compute tau (in exf_bulkformulae.F) from windstress averaged to
235       mass points to avoid tau = 0
236     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
237    o rdmnc.m: make it work with "global" files created with gluemnc
238    o rdmnc.m : some improvements in dealing with singleton dimension
239      (tested on all testreport mnc output files).
240    o genmake2: disable pkg/profiles if netcdf test fails.
241    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
242    o move call to cal_readparms up to make calendar parameters/variable available
243      to all packages
244    
245    checkpoint58v_post
246    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
247      useDynP_inEos_Zc tested.
248    o pkg/exf: changes to properly interpolate/mask/scale initial fields
249    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
250      and portions thereof.  See read_cs.txt for description and examples.
251    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
252      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
253      following the great-circle arc between those 2 points.
254    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
255      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
256    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
257     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
258     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
259     - still needs work (not working with some options ; efficiency to improve)
260       and serious testing.
261     - use this scheme for temperature & salinity in 2 advection test exp.:
262       advect_xy & advect_xz, respectively.
263    
264    checkpoint58u_post
265    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
266    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
267    o testreport: add option "-skipdir" to skip some test.
268    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
269      momentum calculation.
270    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
271    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
272      remove checkpoint.F and the_correction_step.F (no longer used);
273      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
274    o add option (linFSConserveTr) to correct for tracer source/sink due to
275      Linear Free surface
276    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
277    o pkg/thsice: fix reading mnc-pickups
278    
279    checkpoint58t_post
280    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
281    o pkg/mdsio:
282     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
283       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
284       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
285     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
286     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
287       either MDS_READ_FIELD or MDS_WRITE_FIELD )
288     - new S/R (to replace MDSWRITEMETA), which allows to write more
289       informations (variable names, time ...) to meta files.
290     - modify rdmds.m to give back the meta file content.
291    o pkg/diagnostics: change vertical interpolation to be safer, and more
292       flexible (define p-levels to interpolate to in data.diagnostics);
293      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
294       diagnostic pointer.
295    o pkg/seaice: more cleaning up of seaice_growth, added many comments
296    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
297    o fix multi-category seaice:
298     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
299       SEAICE_MULTICATEGORY
300     - fix short wave heat flux
301    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
302       and allow to use EVP solver. Change forward lab_sea: test both EVP
303       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
304    o Initial check-in of lab_sea adjoint
305      (very similar to natl_box_adjoint/code_seaice)
306      * used C-grid and EVP solver
307      * used KPP, GM/Redi
308      * uses inAdExact=.TRUE.
309      * gradient checks fail for both ADM and TLM
310        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
311        f.d. gradients actually seem more problematic than ADM, TLM gradients;
312        issue is related to forward mismatch between g77 an ifort
313    o pkg/seaice: overhaul of thermodynamics
314     - growth.F and groatb.F are replaced by new routine seaice_growth.F
315     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
316     - move a few global fields out of SEAICE.h into seaice_growth.F and
317       make them 2D (FICE/QNETO/ ...)
318     - remove FO (it is the same as QNETO)
319     - introduce a few local fields to avoid modifying external fields such
320       as atemp, etc.
321    
322    checkpoint58s_post
323    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
324      changed exf_set_gen.F so that
325        genperiod=0 means input file is one time-constant field and
326        genperiod=-12 means input file contains 12 monthly means
327    o CG2D: use pre-computed solver main-diagonal (stored in common block);
328      this affects truncation error ; generate new output file for exp. which
329      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
330        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
331        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
332        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
333        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
334        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
335    o start implementation of deep-atmosphere and anelastic formulation
336    o verification: remove 2nd copy of input files and use script "prepare_run"
337      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
338    o mom_common/vecinv/fluxform: fix a few initialisation isssues
339    o profiles: fix for multithreaded case
340    
341    o diagnostics: rename few diags:
342      s/'PRESSURE'/'RCENTER '/g
343      s/'TICE    '/'oceFreez'/g
344      s/'TAUX    '/'oceTAUX '/g
345      s/'TAUY    '/'oceTAUY '/g
346      s/'SWFLUX  '/'oceQsw  '/g
347      s/DIFx/DFxE/g
348      s/DIFy/DFyE/g
349      and add few ocean-forcing diagnostics:
350      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
351    o modifications to pkg/seaice/growth.F and budget.F, which change results of
352      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
353      as actual snow thickness.  It now refers everywhere to effective snow
354      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
355    
356    checkpoint58r_post
357    o modifications to pkg/seaice/growth.F, which change results of
358      lab_sea experiment: fixes pertain to melting snow over open water, to
359      masking EVAP under sea ice, and to using the correct AREA variable for
360      computations of EVAP, PRECIP, HSNOW, and GHEFF
361    o add ability to read bathy, salt, and theta using MNC (off by def)
362    o add flooding algorithm and advection of HSNOW for pkg/seaice;
363      both are turned off by default and do no change any results
364    o seaice advection with pkg/thsice: a step toward the use of non-linear
365      advection scheme, but #ifdef or commented out for now (requires more EXCH).
366    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
367      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
368      in natl_box (affects results @ truncation level: update output.txt)
369    o multi-threading and IO:
370      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
371      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
372        (needed to work with SingleCpuIO): tested in all verif. exp.
373    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
374      affects the results (but none of the verification test uses this scheme).
375    o Adding some pkg/diagnostics capability to pkg/seaice
376      (will certainly be subject to changes)
377    o ctrl: adding new control variables:
378      lwflux, lwdown, evap, snowprecip, apressure, runoff
379    
380    checkpoint58q_post
381    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
382      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
383      high_res_cube configuration by 4% on Columbia.
384    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
385      add (in global_with_exf/code) a version of EXF_INTERP_READ without
386      dynamical allocation (seems to work in multi-threaded).
387    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
388      single CPU io) so that TAF does not have to see EESUPPORT.h
389    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
390    
391    checkpoint58p_post
392    o obcs: stop if obcs is used with useCDscheme = .true.
393    o shelfice:
394     - fix a sign error so that no slip at shelfice interface works
395     - remove stop for combination non-hydrostatic code and shelfice. That does
396       not mean, that the results are correct, but at least they are numerically
397       stable
398    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
399    o added adjoint exch routined for all exch*3d* routines
400      and updated flow directives
401    
402    checkpoint58o_post
403    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
404      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
405    o change controling S/R for writing pickup file (new S/R do_write_pickup)
406      and clean-up reading/writing of pickup files.
407    o fix local version of read/write pickup (NH part) in rotating_tank/code
408    o simplify EXCH interface:
409     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
410     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
411    o added the regrid package
412    o shelfice:
413     - add a simple boundary layer scheme to reduce noise
414     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
415    
416    checkpoint58n_post
417    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
418       local variable (not in common block).
419    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
420      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
421      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
422        to work with SingleCpuIO.
423    o add "_d 0" to real constant of pkg/cfc subroutines ;
424       update exp. cfc_exemple & tutorial_cfc_offline output files.
425    o multi-threading and IO:
426      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
427        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
428      - barrier before and after reading.
429      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
430      - avoid using MDS_WRITELOCAL for LAND pkg output.
431      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
432        common-block variables ; Allows multi-threading with master-thread IO.
433    o change default MAX_NO_THREADS from 32 to 4 ;
434      and stop cleanly when MAX_NO_THREADS is too small.
435    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
436    
437    checkpoint58m_post
438    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
439       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
440    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
441       keep global_ocean.90x40x15 (for AD testing) with former secondary test
442       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
443    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
444        add MITgcm_tutorials (= code + all the tutorials)
445    o ecco, option to compute cost for total ssh (mean+anom)
446    o consistent with addition of ptracer and ssh in pkg/profiles
447    o profiles: adding ptracer and ssh
448    o testreport: change multi-test output-file name
449      (from output.txt.{name} to output.{name}.txt)
450    o profiles: now ok for mutli-tiles case
451    o seaice: add 4 parameters for different advection schemes for area,
452      (effective) seaice thickness, enthalphy, and snow height. Their default
453      is the standard parameter SEAICEadvScheme
454    o calc_gw:
455     - add cosFacU in zonal viscous flux (harmonic.visc.).
456     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
457       of tutorial_plume_on_slope.
458    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
459    o calc_gw: true flux-form, account for horizontal grid spacing.
460      update rotating_tank results, but not plume_on_slope (affected at
461      truncation level, 11 digits).
462    
463    checkpoint58l_post
464    o calc_gw:
465     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
466     - remove side-drag for now (need to fix it); update plume_on_slope results.
467     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
468    o commit code to make SST/SSS weights spatially variable
469      (based on either variable in-situ or variable initial T/S weights)
470    o pkg/ecco:
471      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
472        now based on horizontally varying weights wthetaLev, wsaltLev
473      * cost_averagesflags now returns year indices in addition to day, month
474      * sflux balance is performed on annual basis
475        (sflxumm, sfluxmm2, bal_sfluxmm)
476      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
477        including separate counting and multipliers
478    o pkg/rbcs
479      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
480    
481    checkpoint58k_post
482    o testreport:
483     - always build in dir. "build" (if not there, mkdir build instead of building
484       & running in input)
485     - run in dir run (if it exists), in build otherwise.
486     - call prepare_run (if input/prepare_run exists)
487     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
488    o pkg/exf modifications to interpolation and rotation routines for more
489       reasonable treatment of North Pole singularity: for tracers North Pole
490       value is set to northernmost zonal-mean value, for zonal velocity it is
491       set to zero, and for meridional velocity it is set to northernmost value.
492    o pkg/exf/exf_check_range.F
493     - add tile index to diagnostics and move stop statement to the very
494       end of the routine.
495    o pkg/diagnostics: (diagnostics_main_init.F)
496      define title of isomorphic variables according to the current config.
497    o pkg/thsice with pkg/seaice dynamics:
498    - fix domain of computation (interior only, required for exf) and do exchanges
499    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
500    o towards a standard way of dealing with multi-threading in MONITOR
501      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
502    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
503       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
504    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
505    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
506    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
507       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
508    o tracer advection:
509     - clean-up and simplify calc_common_factors.F
510     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
511       advection subroutine (but still not used within DST advection S/R)
512    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
513    
514    checkpoint58j_post
515    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
516      from file (collects calls previously in FORWARD_STEP)
517    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
518    o adjoint store dir. adjusted accordingly
519    o genmake2
520      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
521    
522    checkpoint58i_post
523    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
524      on wind stress (SEAICEstressFactor defaults to 1.)
525    o Total number of Timers is finite (<=40): comment out 2 non-essential one
526      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
527    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
528      on CS-grid: no longer loosing mass.
529    o exf & curvilinear-grid: no longer modify longitude xC & xG.
530    o pkg/ggl90: fix sloppy output and fix a bug
531    o pkg/seaice: added SEAICEuseEVPpickup parameter
532      - Set to false in order to start EVP solver with
533        non-EVP pickup files when using SEAICEuseEVP
534      - fix sign error in diffusion in seaice_calc_rhs
535    
536    checkpoint58h_post
537    * Modifications for bottom topography control
538      o replace hFacC by _hFacC at various places
539      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
540      o add non-self-adjoint cg2d_nsa
541      o update autodiff support routines
542      o re-initialise hfac after ctrl_depth_ini
543      o works for 5x5 box, doesnt work for global_ocean.90x40x15
544    * Adding verification for 5x5 box (4-layer) bottom topography control
545    
546    checkpoint58g_post
547    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
548       used for mean seasonal cycle, mean diurnal cycle); add an example
549       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
550    o pkg/ggl90:
551      - add parameter (minimum surface kinetic energy)
552      - fix bug (avoiding division by zero)
553    o couple pkg/thsice to pkg/seaice:
554      - modify advection in seaice to accomodate new scalar fields to be advected
555      - only muliDimAdection scheme work with seaice/thsice
556      - mapping of thsice-variables to seaice-variables, back and forth
557      - does not break the verification experiments, but does not give the
558        desired results either
559    o pkg/seaice
560      - make (default) second order advection a bit less confusing?
561    
562    checkpoint58f_post
563    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
564      to pkg/seaice):
565      - new routines thsice_map_exf and thsice_get_exf provide the interface
566      - add an additional formal parameter to thsice_solve4temp
567    o pkg/exf:
568      - add new fields wspeed, snowprecip (to be able to couple to thsice)
569      - correct Stefan-Boltzmann constant
570      - new parameter for longwave surface emittance
571      - separate some stuff from exf_bulkformulae into new routines  
572        exf_radiation, exf_wind
573      - add new parameters and constants: longwave emissivity for ocean, ice
574        and snow, evaporation parameters over ice
575      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
576        either wind from stress or stress from wind
577    o pkg/thSIce:
578    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
579    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
580       and THSICE_CALC_THICKN
581    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
582    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
583      to make debugging easier.
584    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
585    o pkg/bulk_force:
586      - clean-up comments and parameters ;
587      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
588    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
589      generate new output for test-experiment: aim.5l_cs.thSI
590    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
591      testreport accordingly
592    
593    checkpoint58e_post
594    o SEAICE_CGRID adjoint done
595    o R_STAR adjoint implemented.
596      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
597      * need to sort out init. of h0facc, etc.
598    o Make pkg/profile fully independent of ecco,cost, etc. stuff
599      to be able to use it in pure forward.
600    
601    checkpoint58d_post
602    o upgrade simple test-experiment to tutorial example:
603     step.1: duplicate the experiment and (step.2) will remove the old copy.
604      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
605      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
606      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
607      tutorial_global_oce_biogeo    <- copy of dic_example
608      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
609      tutorial_plume_on_slope       <- copy of plume_on_slope
610      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
611      tutorial_global_oce_optim     <- empty for now (David ?)
612      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
613     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
614    o correct a sign problem in cost_scat.F
615    o obcs and ptracers: fix boundary conditions for advections schemes
616      with larger stencil
617    o thsice adjoint: start
618    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
619      completeness
620    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
621      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
622    o ptracers adjoint:
623      * avoid extensive recomputatations
624      * fix missing re-init. of gptr (missed by TAF)
625    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
626      me to turn off the excessive output to STDOUT that this package produces
627    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
628      and add those terms in Vector-Invariant formulation.
629    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
630      if the control period (xx_hfluxperiod etc) is 0
631    o in profiles pkg, clean routines and fix details
632    o in ecco pkg, reading ssh data:
633      fix problem in case the model does not start at iter0=0
634    o fix mnc-pickup/restart for ptracers
635    o new package prifiles:
636      code to compute profile-based cost by Gael Forget
637      (modifs in ecco, ctrl, autodiff)
638    o Benign bug fix in initialization (spotted by M. Mazloff) of
639      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
640    
641    checkpoint58c_post
642    o adjoint: finish NLFS adjoint and provide reference output in
643      verification/global_ocean.90x40x15/results_ad_nlfs
644    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
645      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
646      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
647      with SEAICE_CGRID defined.
648    o move calendarDumps from "data" to "data.cal" and clean-up the code
649      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
650    o add useEXF & useCAL flags (for now, set in hard-coded way)
651    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
652      (were missing in NH mode, and wrong in quasihydrostatic mode).
653      waiting for Chris updated version of calc_gw to add those CALLs.
654    o fix bug in quasihydrostatic S/R ;
655      add a test for this option: global_ocean.90x40x15.qshyd
656    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
657      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
658    o add on/off flag useOffLine for package OFFLINE
659    o seaice:
660      - modify advection so that it works also on the C-grid
661      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
662        problem in multi-tile runs with C-grid
663      - add flags for clipping ice velocities and/or masking solver forcing
664      - fix drag (ocean on ice) formulation and a bug that caused noise in the
665        C-grid solver
666      - added a few comments to seaice_diffusion.F
667      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
668        are now exclusive)
669      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
670        required re-ordering the code a little:
671       + make DAIRN global variable (defined in SEAICE)
672       + move computation of the viscosities eta and zeta into a new separate
673         routine (because I need to recompute them in seaice_ocean_stress.F)
674    
675    checkpoint58b_post
676    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
677      update output.txt of exp. aim.5l_cs.thSI
678    o various mnc cleanups and improvements:
679      + shrink lookup tables by factor of ~4
680      + better error reporting when running out of lookup space
681      + able to handle longer path/file names (up to 500 chars)
682    o adjoint:
683      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
684      - TBD: "hidden" mom_vecinv recomp. in dynamics
685    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
686     (allow to differentiate between forcing components using new integer flags:
687      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
688     and add new flag to put Dissipation tendency out of Adams-Bashforth.
689    o ecco
690      - enable trend removal from SSH anomaly obs.
691    o adjoint
692      - a fix for PmEpR when #undef EXACT_CONSERV
693      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
694      - try to fix "hidden" recomp. in forward_step for NLFS
695        (NLFS seems broken sometimes after I checked it in)
696    o seaice:
697     - add c-grid version of the dynamic solver:
698       + three new routines that are the c-grid substitute lsr, dynsolver
699         and ostres
700       + put a few fields that were local to dynsolver into global common
701         blocks, so that I can move the computation of stresses etc into
702         seaice_lsr (saves coding but may break the adjoint).
703     - replace more hardwired parameters by runtime parameters
704     - add ice masks that mask the rhs of the implicit solvers where there
705       is no ice (commented out in seaice_dynsolver, because i am not sure
706       if this works properly), eventually this should replace the clipping
707       of ice velocities in seaice_dynsolver to +/-40cm/s.
708    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
709      include it only where its needed
710    o move balancing of fluxes before the call of external_forcing_surf
711    o seaice:
712      - correct units of turning angles (now they are really in degrees)
713      - move computation of GWATX/Y out of main routine into dynsolver
714      - initialize GWATX/Y in seaice_init
715    o Apply mask on Fresh-Water flux (needed for SSH forcing).
716      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
717    o seaice: add runtime flags for turning angles (default to zero)
718    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
719      and trend from exf forcing and ctrl control adjustments
720    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
721      (since checkpoint57x_post)
722    o change the default rotation period to 86164.s = the Earth rotation
723    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
724      and based on a reference stratification. Tested within hs94.cs-32x32x5.
725    o seaice advection: add code for choosing between the default (2nd order
726      central differences) and multiDim advection schemes provided by
727      pkg/generic_advdiff
728    o seaice:
729      - removed all references to SEAICE_GRID.h fields from
730        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
731        (cubed-sphere configuration will change a little)
732      - grid computations in seaice_init are obsolete now.
733      - cleaned up code a little so that is easier to read (hopefully).
734      - added new (better?) discretizations of default advection and diffusion
735        (turn on with SEAICEuseFluxForm)
736      - replace 1 in 3d global fields by kSurface in growth.F
737      
738    checkpoint58a_post
739    o seaice:
740      - bug fix in advect.F
741    o shelfice:
742      - separate shelfice load anomaly from pload (breaks with time
743        dependent forcing), => introduce constant field shelficeLoadAnomaly.
744        Its default is 0., but it may be computed more cleverly from (unknown)
745        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
746        done offline. A good approximation of the pressure load anomaly is
747        necessary to avoid large initial adjustment processes underneath
748        deep-reaching shelfice.
749      - small fix in ISOMIP shelfice_thermodynamics
750      - add more sophisticated thermodynamics of Hellmer (1989), this is
751        now the default
752      - give a few constants more intuitive names
753    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
754      if bulk formulae are used in long integration (especially EmPmR). Turn
755      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
756      if balancePrintMean, the imbalance that is substracted is printed to
757      STDOUT.
758    o fix bug (typo) in obcs_apply_eta.F
759    o add a new package shelfice which enables us to model the circulation
760      underneath shelf-ice with draughts of hundreds of meters.
761     - works
762     - to do: + include improved thermodynamics
763              + check whether kSurfC (from model/inc/SURFACE.h) can be used
764                instead of new field kTopC
765              + can we use topoFile, Ro_surf and existing code in ini_depth.F
766                instead of new field R_shelfIce and new code in ini_depth.F
767                and ini_mask_etc.F?
768              + adjust vertical mixing schemes?
769    o seaice pkg:
770     - add a cpp-flag to include a simple formula for a salinity dependent
771       freezing point of sea water at the surface
772     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
773       meridional stresses are now different (and hopefully correct)
774    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
775       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
776       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
777    o pkg/diagnostics: add options and parameters for regional-statistics
778       diagnostics ; define regions by reading a region-mask from a file
779       (might add other options later)
780    o pkg/bulk_force:
781     - add option and parameters to use AIM surface-flux formulae.
782     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
783       others forcing fields (defined in PARM05, parameter file "data") are loaded
784       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
785     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
786     - use the right EXCH call for uwind,vwind (to work on CS-grid).
787     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
788       and parameters (note: calcWindStress replaces .NOT.readwindstress).
789     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
790    
791    checkpoint58
792    o add "--embed-source" option to genmake2 which, when the supporting
793      tools can be compiled (as determined by genmake2) will turn on the
794      embed_files package which then embeds the entire MITgcm source code
795      (*.[fFhc] + Makefile) used for the build within the executable
796      - requested by CNH but off by default
797      - adds a paltry <9MB to the mitgcmuv executable in most cases
798      - only writes the output when useEMBEDSRC in eedata is true
799    o clean up 3-dim. relaxation codes:
800      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
801      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
802      * Thanks to Tom Haine for testing!
803    
804    checkpoint57z_post
805    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
806      affects output (@ truncation level) of exp. plume_on_slope ; updated.
807    o fix the pickup behavior for obcs in combination with ptracers
808    o fix a bug in ptracers_external_fields_load
809    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
810      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
811    o transfered surface NH pressure to eta field (if exactConserv).
812    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
813         and update lab_sea output.txt file.
814    o completing 3-dim. relaxation code: additional term
815         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
816      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
817      * At compile time, in "EXF_OPTIONS.h" set
818          #define  ALLOW_CLIMTEMP_RELAXATION
819          #define  ALLOW_CLIMSALT_RELAXATION
820      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
821          tauThetaClimRelax3Dim = 15552000.0,
822          tauSaltClimRelax3Dim  = 15552000.0,
823      * 3 cases:
824          1) Use a constant-in-time 3-dim. field
825          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
826          3) Real-time relax. to time-evolving prescribed field
827    o Adding Laplacian-type smoothness constraint on
828      initial and boundary (forcing) controls (ic, bc)
829      * enable at compile-time via
830        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
831      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
832      * Absolute scale somewhat unclear so far
833      * no area weighting was included since no other cost term does so far
834    
835    checkpoint57y_post
836    First step for a NLFS adjoint
837    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
838    o new init. routines for calc_r_star, calc_surf_dr
839    o still need to deal with ini_masks_etc
840    o testreport seemed happy
841    checkpoint57y_pre
842    
843    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
844    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
845    o add new offset feature to offline pkg (plus minor cleanup)
846    o cfc fixes for final year of integration
847    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
848      be in GCHEM_OPTIONS).
849    
850    checkpoint57x_post
851    o fix testreport Pb in multiple test experiment.
852    o cleanup our namelist syntax in verification:
853      - make it more F95 standards compliant (some work still needed)
854      - allows the vast majority of our tests to work with gfortran
855    o Non-Hydrostatic:
856     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
857     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
858    o Allow to apply AB on T,S rather than on AB(gT,gS):
859     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
860     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
861       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
862     - need a "clever" read_pickup to restart from the other AB formulation
863    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
864    o remove some unused variables (reduces number of compiler warnings)
865    o adjoint
866      * Disable useVariableViscosity for adjoint for time being
867        (there are a number of extensive recomputations)
868      * Initialize certain variables needed for adjoint
869    
870    checkpoint57w_post
871    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
872                 fix the singleCpuIO RS version of MDSWRITEFIELD
873       and add a WARNING if using globalFiles=T with multi-processors.
874    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
875      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
876    o tracer advection scheme:
877      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
878       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
879       was not very convenient).
880      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
881       (further tests needed for the implicit DST & Flux-Limiter schemes).
882    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
883      and sRef for convenience, handy, when you want to initialize
884      ptracers in a large domain with a constant non-zero value. Also,
885      untangle ptracers_init.F a little.
886    
887    checkpoint57v_post
888    o change dome exp. to use variable viscosity in side-drag terms.
889    o remove all the files from the cfc_offline test since they are now
890      incorporated into tutorial_cfc_offline which has been producing
891      identical results for a few days of testing
892    o add new parameter: sideDragFactor to enable half-slip-side BC
893      and change side-drag S/R to use viscosity from mom_calc_visc
894      (can switch back by setting sideDragFactor=0.); affects results at
895      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
896       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
897    o vorticity & strain are now computed without masking, to account for
898      no-slip-side BC in variable viscosity calculation ; mask is applied
899      anyway later on, before computing advection/coriolis terms.
900    o modify exp4 to test new obcs support for reading from external files
901      and for passive tracers
902    o fix behavior of ptracers_monitor when monitor output is written to a
903      netcdf-file; still not independent of monitor.F (writes in the same
904      file).
905    o change default value of tRef (put a uniform, meaningful value for ocean
906      & atmos) and initialize sRef (was missing, as Martin mentioned).
907    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
908      to be proportional to enstrophy dissipation length.  Thus,
909       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
910      This is now consistent with Smagorinsky and with the manual.
911    
912    checkpoint57u_post
913    o OBCS and PTRACERS: add open boundary support for passive tracers
914      - either use homogenous (pseudo) v.Neumann conditions or prescribe
915        OB-values from file; this is not different from the way theta and salinity
916        are treated
917      - however, Orlanski-radiation conditions are not supported, and the model
918        will stop if you use pTracers and Orlanski at the same time.
919      - beefed up the rountine obcs_external_fields_load: now only those open
920        boundary values are overwritten with values from files for which there
921        are really files, otherwise the OB-fields remain untouched. This makes
922        it possible to use different OBs at different ends of the domain (as
923        with EXF)
924    o reduce number of exch calls in shap_filt (s2).
925    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
926      truncation level) 4/5 MLAdjust test results (11&12 digits match).
927    
928    checkpoint57t_post
929    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
930    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
931      same truncation, independent of the face number: affects affects several
932      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
933    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
934      note that biharmonic viscosity + no-slip was not tested in any experiment.
935    o fix bug in non-linear free-surf side-drag ; generate new output for
936      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
937    o make mnc honor the writeBinaryPrec flag for most kinds of output
938    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
939    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
940      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
941    o add brackets in multi-terms sum to get same truncation, independent of
942      the face number (manage to get exactly same value of gU,gV at the cs-edge)
943      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
944    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
945      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
946      a maximum grid-scale Reynolds number.  Also, changes all length calculations
947      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
948      Suggested values of viscosity parameters found in mom_calc_visc.
949      Many new viscosity diagnostics available.
950    
951    checkpoint57s_post
952    o Add clearing-house for viscosity calculations, mom_calc_visc and
953      correct numerous bugs in LeithD and Smagorinsky discretizations.  
954      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
955      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
956      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
957      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
958      The Strain-Tension form is now called with useStrainTensonVisc=.true.
959      ViscAhStrain and viscAhTension are now retired.
960    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
961    o In response to JMC's bug report, genmake2 now ignores any soft-links
962      that it finds in the *current* directory when searching for files.
963      Soft-links found in any other source directories will still work as
964      they did before.
965    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
966      a C routine to unlimit the stack size
967    o mnc-ify pkg/aim snapshot vars
968    o mnc-ify pkg/land as requested by Daniel
969    o various changes to mnc including:
970      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
971      - output can now be grouped so that all files within a group
972          change the ITER portion of their names in lock-step together
973      - can now read ("global") PER-FACE (in addition to PER-TILE) files
974          and works with both EXCH1 and EXCH2 (but needs more testing)
975      - writing works for all verification test cases w/ g77 on Linux
976    
977    checkpoint57r_post
978    o make MNC variable initialization happen earlier
979    o add diagnostics for (almost) each term of the momentum Eq.
980    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
981    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
982    o remove MINIMAL_TAVE_OUTPUT option ;
983      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
984    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
985      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
986    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
987    o add time-dependent SST, SSS control
988    o cost terms in ecco/ modularized (new cost_generic.F)
989    o cost_averages routines are modularized (new cost_averagesgeneric.F)
990    o new infrastructure for seaice model vs. obs misfits in seaice/
991      * driver from the_main_loop.F is seaice_cost_driver.F
992      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
993      * gradient check in Exp. 6a of natl_box_adjoint/
994    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
995      (see README file)
996    
997    checkpoint57q_post
998    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
999    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1000      - bug was reported by Jean-Michel and Ian Fenty
1001    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1002      update exp. cpl_aim+ocn output.
1003    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1004      Needed for high-res. runs with large global files
1005      to be able to limit tapelev size
1006    o Changed some tests for adjoint:
1007      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1008      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1009      * global_ocean.90x40x15/ back to default 3-level checkpointing
1010    o Modifications to enable scripted COMMON to MODULE conversion
1011      * verification/OpenAD/code/ has necessary scripts and description;
1012      * converts, compiles and runs successfully;
1013    
1014    checkpoint57p_post
1015    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1016    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1017      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1018    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1019    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1020      (was already the case for dissipation with mom_vecinv,
1021       and also the case for grad.PhiHyd when staggered-timeStep)
1022      This will allow to put dissipation out-off the AB time-stepping.
1023     Unfortunately, affects truncation error. Update output of exp. that "fails"
1024      (cg2d matching number) and leave the others for later: front_relax(10),
1025      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1026      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1027    
1028    checkpoint57o_post
1029    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1030      (2) its ready to be documented during the 20050801 DocFest
1031    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1032      for ideal_2D_oce and lab_sea on linux_ia32_g77
1033    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1034      in global1x1_tot/code_seaice_adj to access indices 32, 33
1035      (worth another tag)
1036    
1037    checkpoint57n_post
1038    o adding precip control xx_precip 32
1039    o adding swflux control xx_swflux 33
1040    o Replacing 10 forcing penalty cost routines by 1 generic.
1041    o Implementing partitioning in time-mean and variable adjustment
1042      for atmos. state.
1043    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1044    o in natl_box_adjoint:
1045      * updated exp 1 to 10
1046        (but does not have time-mean vs. variable split results yet)
1047    o updated global1x1/*_seaice_adj/
1048      to incorporate latest changes
1049    o enable useSingleCpuIO for mdsio vector routines
1050      (applies in particular to tapelev I/O)
1051    o removed inefficient K-loop in all active_file*control*.F
1052    
1053    checkpoint57m_post
1054    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1055      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1056    o pkg/exch2: filling of face-corner halo regions is optional
1057      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1058    
1059    checkpoint57l_post
1060     tag before updating tutorials (pre-release-2)
1061    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1062       for output and interpolation of input fields onto model grid)
1063    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1064       Affects results of exp. rotating_tank ; update output.txt.
1065    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1066          and taking the square quantity and/or using a fraction-weight field.
1067    o fix aim_diagnostics_init.F mate numbers.
1068    o add mnc output capability to diagnostics/diagstat and update
1069      our cvsignore files for the ACSII output generated
1070    
1071    checkpoint57k_post
1072    o lab_sea now uses diagnostics package and provides a suite of
1073      new EXF diagnostics output.
1074    
1075    checkpoint57j_post
1076    o exf
1077      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1078        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1079        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1080      * extended diagnostics output
1081        - now includes all EXF variables
1082        - hs, hl moved to common block
1083        - separate S/R for diagnostics, called after ctrl vector is added
1084        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1085        - EXFqnet contains true Qnet (i.e. includes qsw)
1086      * updated verif. lab_sea, global_with_exf
1087      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1088        to ensure that diagnostics sees a true EXFqnet
1089    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1090    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1091      several times with different frequencies.
1092    o mnc-ify the thsice package as requested by Daniel Enderton
1093      - the monitor--MNC output needs work
1094      - many attributes need to be added (most are currently blank)
1095    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1096      - many attributes need to be added (most are currently blank)
1097    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1098    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1099    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1100      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1101         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1102    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1103     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1104    
1105    checkpoint57i_post
1106    o Diagnostics package was changed: diagnostic allocation is now deactivated
1107      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1108    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1109      add 1rst Order upwind vertical Shear.
1110    o add a quick fix for A/B checkpointing in OFFLINE mode
1111    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1112      end-run around the C/Fortran linking horror in eesup/src/timers.F
1113    o added pkg/runclock: allows user to terminate run based on wall clock
1114    o added non-hydrostatic scaling parameter: nh_am2
1115    o pkg/my82: futile attempt to make results compiler-independent by adding
1116      some "_d 0", etc. no effect.
1117    o for mnc output, fill the 'T' coordinate var with myTime and create a
1118      separate 'iter' variable for iteration count
1119    o pkg/diagnostics:
1120      add new capability: output of Global/Regional & per-level statistics ;
1121      tested against monitor output (including land & thSIce) on various exp.
1122    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1123    
1124    checkpoint57h_done
1125      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1126      data.diagnostics, data.gchem, data.ptracers) is done.
1127    
1128    o pkg/diagnostics: prepare for Global/Regional statistics.
1129      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1130    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1131      and rename it: DIFFERENT_MULTIPLE
1132    
1133    checkpoint57h_post
1134    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1135    o pkg/diagnostics: change output frequency, now in seconds (instead
1136      of Nb of iterations). This requires to change data.diagnostics.
1137    checkpoint57h_pre
1138    
1139    o in mnc, let the user create the output dir if both mnc_outdir_date
1140      and mnc_outdir_num are false
1141    o add fflags() to pkg/diagnostics which allows one to specify, on a
1142      per-file basis, the file precision [default behavior is unchanged]
1143    o added diagnostics to pkg/kpp, including computation of mixed layer
1144      depth based on a temperature/density criterion
1145    o updated verification/natl_box to test the new pkg/kpp diagnostics
1146    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1147    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1148    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1149      not mnc -- this mistake was found by JMC and is now corrected
1150    
1151    checkpoint57g_post
1152    o add Adams-Bashforth 3rd Order time stepping:
1153      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1154      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1155    checkpoint57g_pre
1156    
1157    o make lambda[Theta,Salt]ClimRelax spatially varying
1158      (default remains spatially uniform constant based on tau)
1159    o added new control variables
1160      * init. uVel, vVel, etanN
1161      * lambda[Theta,Salt]ClimRelax
1162    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1163      (suggested by G. Forget)
1164    
1165    checkpoint57f_post
1166    o add parameter "baseTime" = model base time = time at iteration zero
1167      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1168      account for baseTime shift
1169    o move Coriolis arrays from PARAMS.h to GRID.h
1170    checkpoint57f_pre
1171    
1172    o mnc-ifying the seaice package
1173    o introduced an alternative length scale calculation for use in the limiting
1174      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1175    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1176    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1177      as well as grad(vort3).  Made it compatible with both approximate form
1178      for the cubed sphere and full form of these gradients.  Added flag
1179      useFullLeith to select between approximate and full form.  
1180    o add "d0" in getcon.F to reduce differences between compilers/platforms
1181      update output.txt of exp. fizhi-gridalt-hs
1182    o change port_rand funtion to allow to set the seed.
1183    o fix obscure MNC bug involving conversion between reals and integers
1184      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1185        new version is now more standards-compliant
1186    o adjoint-related modifications
1187      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1188      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1189      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1190    
1191    checkpoint57e_post
1192    o Adding eddy stress controls a la Ferreira et al.
1193    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1194    
1195    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1196      update output.txt of exp. fizhi-gridalt-hs
1197    o add more "Z" dimensions and associated coordinate vars to MNC
1198    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1199    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1200      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1201      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1202      months and years.  Requires pkg/cal.
1203    o diagnostics: add pickup functionality
1204      - off by default for backwards compatibility
1205      - current version only uses MDSIO -- MNC will be added
1206    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1207    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1208    
1209    checkpoint57d_post
1210    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1211    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1212      output from the diagnostics package
1213    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1214    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1215      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1216    o add coordinate variables to the MNC output from the diagnostics package
1217    o change MNC-flags default value: true when useMNC=TRUE
1218    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1219      the ability (off by default) to read the grid information using MNC
1220    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1221    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1222    o do snap-shot diagnostics at the middle of the time-interval (instead of
1223      at the end).
1224    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1225      new test for AIM with thSIce + slab-ocean
1226    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1227    o move state variable diagnostics to the beginning of the time step ;
1228      (note: still needs some work specially for snap-shot diagnostics)
1229      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1230    
1231    checkpoint57c_post
1232    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1233    o generate new output.txt files on faulks with g77 & the new -ieee option
1234    checkpoint57c_pre
1235    
1236    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1237      update output.txt of exp. global_ocean.90x40x15
1238    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1239      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1240    o add saltFlux(+File) forcing capability with periodicExternalForcing
1241    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1242    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1243    o improvements for the MNC output from DIAGNOSTICS:
1244      - correct handling of the unlimitied dimension
1245      - all dims now have associated coordinate variables
1246      - variables located at U, V, and Corner ("Z") points are now written
1247        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1248        *all* data points are output
1249    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1250    o added pkg/seaice/seaice_monitor.F
1251    o mdsio_readfield.F can now read files visible only to master MPI process.
1252    o pkg/seaice: some test code for ice-modified ocean stress
1253    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1254      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1255      spurious negative numbers for precipitation and humidity.  Will cause
1256      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1257    o pkg/ctrl/
1258      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1259        May be enabled via doPackDiag
1260      *  introduce z-scaling of
1261         + gradient (doZscalePack) and
1262         + control (doZscaleUnpack)
1263    o pkg/mdsio/
1264      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1265      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1266    
1267    checkpoint57b_post
1268    o simplify options in diagnostics_fill arguments (remove weird combinations)
1269    o fix MNC coordinate variables so that they now contain per-face index
1270      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1271      general, EXCH2 grids are only aligned to a "local" coordinate system
1272    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1273    o Implement instantaneous output within pkg diagnostics:
1274      setting a negative frequency in data.diagnostics produces
1275     "snap-shot" output (as opposed to time-average if freq > 0)
1276    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1277      NOTE: change ptracer diagnostics name: use 2 characters to work with
1278            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1279    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1280      becomes the coordinate variable for the 'T' dimension
1281    o add CF-style coordinate variables to MNC
1282      - just a first cut:  numbers are meaningless on the cubesphere and
1283        missing along the T axis but otherwise it works!
1284    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1285    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1286    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1287      this is based directly on what the model compute, so that the content of
1288      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1289    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1290    o clean up build options files for SunOS, in particular
1291      - remove -traditional from xmakedepend
1292      - change -xarch=v9 to -xarch=native for f77
1293      - restore use of make (not gmake)
1294      - add CC=gcc if using g77
1295    o changes per discussion of AM, JMC, & EH3 today:
1296      - move redundant "grid" variables out of "state" -- in preparation of
1297        creating proper CF-style coordinate variables and in recognition
1298        that any/all grid variables can be easily copied (eg. w/NCO) from
1299        the grid files into any of the other NetCDF files
1300      - *always* output grid variables with MDSIO (this will eventually be
1301        changed)
1302      - output MNC grid file if useMNC is true
1303    o every instance of _END_MASTER() has been found and replaced with
1304      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1305      preprocessors
1306    o re-arrange diagnostics pkg initialisation:
1307     - allow each package to extend the available diagnostics list
1308     - add some checking and fix small problems (multi-threaded, ...)
1309     - new S/R diagnostics_fill (replace fill_diagnostics):
1310       look through the short list of active diag. (instead of the long list)
1311       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1312    
1313    checkpoint57a_post
1314    o this set of changes restores TAMC compatibility
1315      tested for global_ocean.90x40x15 adjoint on trough
1316      (what a pain)
1317    
1318    checkpoint57a_pre
1319    o some modifs in tools/build_options for sunos
1320    o call ctrl_pack for ctrl at end for optimcycle=0
1321    
1322    checkpoint57
1323    o add horizontal bi-harmonic viscosity for vertical velocity
1324      - new parameter viscA4W (defaults to viscA4)
1325      - affects only non-hydrostatic code
1326      - to be done: no-slip lateral boundary conditions
1327    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1328    o implement Implicit Vertical advection for pTracers
1329    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1330      (implemented also for implicit vertical diffusion & advection)
1331    o OBCS: extend application of tracer open boundary conditions
1332      to a strip beyond the boundary of width Olx/Oly
1333    o add call monitor to TAF set of required calls (flow directives)
1334      and include in natl_box_adjoint
1335    o untangle a few ifdefs related to cost, ctrl, autodiff
1336      untangel a few ALLOW_ECCO_OPTIMIZATION
1337    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1338      (theta2, salt2 in ecco_cost_weights)
1339    
1340    checkpoint56c_post
1341    o OBCS as control variables
1342      - update ctrl_ad_diff.list, obcs_ad_diff.list
1343      - remove balance of obcs controls from default
1344      - fix index bug nobcs in ctrl_init
1345      - fix dummy fields filen in ctrl_pack
1346      - add dummy weights for obcs
1347    o lsopt: comment out fort.94 output
1348    o optim:
1349      - remove unnecessary header files
1350      - adjusted namelists
1351      - add xerbla.F to Makefile
1352    o exf:
1353      - multiple modifications of exf_check_range
1354      - unit change in exf_init_runoff from [m/year] to [m/s]
1355    o mdsio:
1356      - i/o-vector change debugLevel from debLevA to debLevB
1357    
1358    checkpoint56b_post
1359    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1360      is called from DO_THE_MODEL_IO
1361      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1362      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1363      - clean up PTRACERS_WRITE_TIMEAVE a little
1364    o add another verification experiment that tests both the cfc-pkg and
1365      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1366      reactive tendencies treated inline with regular timestepping
1367    o testreport previously did a lousy job of comparing small numbers, so
1368      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1369      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1370      testreport.
1371    o ptracers_monitor: bug fix for MPI
1372    
1373    checkpoint56a_post
1374    o GCHEM: finish reorganizating the package
1375      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1376        (introduces another 3D-array for each passive tracer, but only if
1377        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1378        gchemTendency is not needed because the timestep is done separately)
1379      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1380      - GCHEM is now---more or less cleanly---separate from PTRACERS
1381      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1382        so clear to me how that should be done in a general way.
1383    o CFC: improve formatting of output in CFC_ATMOS
1384    o PTRACERS:
1385      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1386        that ALL experiments with ptracers enable can be checked. This makes
1387        GCHEM_MONITOR obsolete.
1388      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1389        monitorFreq
1390      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1391    o add PTRACERS (PTR0[1-5]) to testreport output
1392    o exf_check_range:
1393      * default changed to .TRUE.
1394      * will check values for niter0 if debLevA, every timestep if debLevB
1395      * STOP in exf_check_range if 'out of range'
1396      * range chosen generous to allow for potential extema
1397      TBD: a version with stricter range
1398           permitted range would be runtime parameters
1399    o GMredi:
1400      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1401      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1402      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1403    o GCHEM:
1404      - move call to GCHEM_FORCING_SEP, so that it is now called before
1405        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1406      - introduced a useGCHEM runtime flag and applied it everywhere.
1407      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1408        this flag is now only visible within GCHEM-pkg routines.
1409      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1410        be replaced by a 3D array that is computed before thermodynamics; for
1411        this, the tracer ID iTracer had to be included into the parameter list
1412        of ptracers_forcing
1413      - set up forward_step to call gchem_forcing, that will replace
1414        gchem_forcing_int in ptracers_forcing
1415      - cleaning up
1416    o small cleaning of exch2: remove files that are also in eesupp/src
1417    
1418    checkpoint56
1419    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1420    o mnc: cleanup "full" files--fixes out-of-memory problem
1421    o ECCO-GODAE
1422      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1423      * fully merged and updated from SIO code
1424        windstress sign change affects
1425        - exf_inscal_[u/v]stress
1426        - sign of xx_tau[u/v] adjustments
1427        - signs in cost_scat
1428      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1429      * natl_box_adjoint updated and compressed
1430      * 2-level checkpoint switch added
1431        (tested in EXP. 1 of natl_box_adjoint)
1432      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1433    o SVD
1434      * first complete, non-hacked version for SVD calculations
1435      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1436        performed via direct access files admtlm_vector.it????
1437        (via ctrl_[un]pack)
1438      * optimcycle is used for ARPACK iteration counter
1439        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1440      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1441        and add linear transforms where necessary
1442      * controls are initial/final SST, SSS (can be extended; need to check
1443        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1444    o mdsio: filename info to both stderr, stdout
1445    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1446      from sign change
1447    
1448    checkpoint55j_post
1449    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1450      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1451    o add consistent build directories and .cvsignore files to verification
1452    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1453    o make all subroutines 30 or less characters in length for certain older
1454      compilers to work (a thorough search only turns up two routines in
1455      pkg/ptracers)
1456    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1457      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1458    
1459    checkpoint55i_post
1460    o change arrays for total vertical diffusivity (2.D if explicit,
1461      3.D if implicit) ; each ptracer uses its own background value.
1462    o added mnc/NetCDF output capability to ocn_compon_interf
1463      - added bits to verification/cpl_aim+ocn so that it can run on
1464        ITRDA and other clusters without the mpirun "-wd" option
1465    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1466      configuration
1467    o give MNC the ability to create additional files rather than
1468      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1469      - the default is just less than 2GB which is a practical limit
1470        on many systems
1471    o Compute the non-local term using either KPP vertical diffusivity (=default)
1472       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1473    
1474    checkpoint55h_post
1475    o add verification test "vermix"
1476    o remove all the *_ioinc flags and replace with the single global
1477      outputTypesInclusive flag
1478    o allow to set a vertical profile of vertical diffusivity for T & S
1479    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1480    o useMNC moved from data.mnc to data.pkg
1481    
1482    checkpoint55g_post
1483    o Renaming carbon AD experiments to comply with testreport conventions
1484    o Updating adjoint of Held-Suarez hs94.1x64x5
1485    o Fixing directives for non-ECCO forward_step, after ECCO directives
1486      have been fixed to avoid recomp. of do_oceanic_phys
1487      Works well for global_ocean.90x40x15,
1488      but recomp. issue remains for carbon
1489    o Updating adjoint output for natl_box_adjoint after
1490      pkg/ecco has been modified (see taga c55d_post)
1491    
1492    checkpoint55f_post
1493    o rename to timeave_init_fixed
1494    
1495    checkpoint55e_post
1496    o some delicate re-shuffle of store directives to avoid one
1497      extra call of do_oceanic_physics
1498      affects ecco_the_main_loop.F, do_oceanic_physics.F
1499      checkpoint_lev1_directives.h
1500    o NB: this may break global_ocean adjoint temporarily,
1501      but it is clear how to fix it. Will do later, need this now.
1502    
1503    checkpoint55d_post
1504    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1505    o ecco_cost_weights is modified to 1x1 runs
1506    o modifs to allow observations to be read in as
1507      single file or yearly files
1508    o enable to read exf forcing fields as either
1509      single file or yearly files (flag useExfYearlyFields)
1510    checkpoint55d_pre
1511    
1512    o switch between 2-level and 3-level checkpointing
1513    o add ability of MNC to write local and "partial" (eg. 2D slices where
1514      the full 3D field is never actually stored) arrays to NetCDF files
1515      with the correct (that is, the complete multi-dimensional) set of
1516      array indicies
1517      - used in mom_vecinv() to write the diagFreq output
1518      - tested (demonstrated) in verification/aim.5l_cs
1519    o further mnc-ification
1520      - add verification/lab_sea to the list with mnc setups
1521      - fix undefined mnc v-names in cd_code
1522      - add kpp to mnc output (both snapshot and timeave)
1523    o non-hydrostatic code
1524      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1525        in calc_gw.F
1526      - defaults to viscAh
1527      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1528        friction or Leith) in non-hydrostatic mode, as long as there is
1529        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1530    o pkg/cost
1531      extend simple cost functions to treat time mean quantities
1532      (T,U,V) via cost_accumulate_state from cost_tile
1533    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1534        be 2 times larger than the minimum size the advection scheme requires.
1535        now get a perfect conservation of salt in advect_cs test-exp (updated)
1536    o GGL90 (Gaspar's TKE mixed layer)
1537      - add horizontal diffusion of TKE, requires exchanges in
1538        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1539        default. In OPA there is no horizontal diffusion of TKE but the
1540        mixing coefficients are computed from a horizontal average of TKE of
1541        6 points or so. I think that diffusion has a little more physical
1542        justification.
1543      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1544        was in vain)
1545      - mask tke-variable in ggl90_init
1546    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1547    o fix biharmonic diffusion on CS-grid.
1548    o more obcs stuff
1549      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1550        for reading boundary values. This routine is called from
1551        obcs_prescribe_read
1552      - updated obcs_check
1553      - changed sponge layer relaxation parameter units for days to seconds
1554      - turned off sponge layer by default
1555      - changed argument list of OBCS_CALC to myTime+deltaTclock
1556      - fixed about 35 bugs in obcs_external_fields_load
1557    
1558    checkpoint55c_post
1559    o obcs stuff
1560      - new runtime flags useOBCSprescribe, useOBCSbalance
1561      - re-arranged obcs_calc
1562      - moved exf_getobcs to obcs_prescibe_read
1563        obcs_prescibe_read is called after ORLANSKI stuff
1564        and independent of it (executable can contain all).
1565      - updated obcs_check
1566      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1567        These may be necessary only if tangential velocities are
1568        prescribed at OB, not sure, needs testing.
1569    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1570      which simplifies the calls and passes the ifc check-bounds test
1571    
1572    checkpoint55b_post
1573    o add a 2D scalar, Z location, exchange_2 routine.
1574    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1575      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1576      affects advect_cs results (for the wrong reason): update output.txt
1577    o use a more standard discretization for biharmonic viscosity ;
1578     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1579      affects results of dome set-up: update output.txt
1580    o fix gad_advection.F (CubedSphere part), back to version 1.23
1581    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1582    
1583    checkpoint55a_post
1584    o merged code to
1585      * prescribe/read time-dependent open boundaries
1586        (works in conjunction with exf, cal)
1587      * sponge layer code for open boundaries
1588      * each boundary N/S/E/W now has its own CPP option
1589        (healthy for the adjoint)
1590    
1591    checkpoint55
1592    o up-to-date adjoint of previous breaks
1593      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1594      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1595      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1596      - carbon: * remove tr1-related adjoint verification
1597                * add ptracer as control variable
1598    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1599      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1600    
1601    checkpoint54f_post
1602    o in verification/carbin/ remove experiment related to
1603      ALLOW_PASSIVE_TRACER (array tr1 etc)
1604      code_ad/ input_ad/ results_ad
1605    
1606    o add two new packages
1607      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1608        + subject to optimization (memory)
1609      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1610        + subject to reordering (many GOTOs in the original code)
1611        + so far opps is called for every (i,j) point, and then operates in
1612          the vertical; one may want to reorder the scheme in order operate in
1613          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1614          fields)
1615    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1616      - all verification tests compile and run with linux_ia32_g77
1617      - defaults are compatible with current input files--nothing
1618        should change if you were not previously using MNC
1619      - MNC output has been added in numerous places (eg. timeave)
1620        but there are still a few writes not yet do-able with MNC
1621        (this is in progress)
1622      - flags now allow for either/or/both use of MDSIO and MNC and
1623        documentation will soon follow
1624      - numerous small formatting cleanups for ProTeX
1625    o add version info (via BUILD_INFO.h) to MNC and stdout
1626    
1627    checkpoint54e_post
1628    o add two new packages
1629      - pp81 (Packanowski and Philander, 1981), Richardson number and
1630        stratification dependent mixing
1631      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1632      - these scheme operate in a similar manner as KPP (without ghat, of
1633        course), however there is only one diffusivity that is used for both
1634        temperature and salinity (and passive tracers)ç
1635    o add offline package
1636    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1637      provided by Stephanie Dutkiewicz
1638    o genmake2: add ability to search for C compilers and cleanup test output
1639      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1640    
1641    checkpoint54d_post
1642    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1643    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1644      leading to additional shift by 5 days each year of integration
1645       (i.e. leading to considerable offset over the years)
1646    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1647    o start with no AB and no initial filtering (staggerTimeStep):
1648      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1649    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1650      (external loading & cpl import/export stay in forward_step.F)
1651    o update coupling interface to work with new staggerTimeStep
1652    o change MDSIO ptracers_pickup.
1653    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1654    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1655    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1656    
1657    checkpoint54c_post
1658    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1659      this affects (truncation error) output.txt of test-exp:
1660       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1661    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1662    o change Qnet to always be the net heat flux, (+upward).
1663      affects (truncation error) output of natl_box exp.: updated
1664    o define the max number of passive tracers in PTRACERS_SIZE.h
1665    o start to test mnc routinely in exp0
1666    o add sea-ice loading (sIceLoad) as a new forcing field.
1667    
1668    checkpoint54b_post
1669    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1670       impressive on Altix and Opteron systems)
1671    o diagnostics can now write NetCDF files through the mnc package
1672    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1673    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1674    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1675      affects (truncation error) output of lab_sea & natl_box exp.: updated
1676    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1677    
1678    checkpoint54a_post
1679    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1680    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1681    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1682    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1683      + internal_wave (shift in writing cg2d_ini_res)
1684    checkpoint54a_pre
1685    
1686    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1687      - modified verification/lab_sea and natl_box_adjoint accordingly
1688    
1689    checkpoint54
1690    checkpoint53g_post
1691    o prepare splitting of thermodynamics: store convect.counter in common block
1692    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1693      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1694    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1695    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1696    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1697    o restore adjointability
1698    
1699    checkpoint53f_post
1700    o modifications that affect AIM experiment results (update output.txt):
1701      - no advection of S at top interface Nr (pkg/generic_advdiff)
1702      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1703    o AIM pkg:
1704      - include stability function into surf.Flux derivative relative to Tsurf
1705      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1706    
1707    checkpoint53e_post
1708    o merged cylindrical coord configuration
1709    o added rotating_tank experiment
1710    checkpoint53e_pre
1711    
1712    checkpoint53d_post
1713    o faulks upgraded: re-generate output.txt that have changed:
1714       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1715    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1716    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1717    o added Sadourny discretization of Coriolis
1718      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1719      - re-enabled use of omega3 (useAbsVorticity)
1720    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1721      vector-invariant equations
1722      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1723    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1724      hopefully without new bugs
1725      - still to do: biharmonic friction for non-hydrostatic w
1726    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1727    o regenerated output for global_ocean_ebm (using -ieee)
1728    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1729      of mom_common/
1730      - simple re-arrangement of instructions within computing loop
1731    checkpoint53d_pre
1732    
1733    checkpoint53c_post
1734    o new version of coupler for AIM+thSIce and Ocean models
1735     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1736     - land: change Evaporation of snow
1737     - aim with thSIce: fix bug in snow-precip.
1738    o changes to calc_gw.F
1739     - bug fix for w^2 term near the bottom boundary
1740     - (hopefully) improve the lateral slip boundary condtions for use with
1741        partial/looped cells
1742      - because the bug fix changes two verification experiments anyway (exp5
1743        and plume on slope), change the lateral boundary condition from half slip
1744        to the value of no_slip_sides
1745    o ebm package wasnt quite up to the parallel task. Fixed that.
1746    o Adjoint of EBM package + verification
1747      * TLM OK
1748      * ADM not sufficient accuracy yet (needs further testing)
1749    
1750    checkpoint53b_post
1751    o Commiting new energy balance model to repository
1752      * package is pkg/ebm
1753      * verif. is verification/global_ocean_ebm
1754      * references are in ebm_driver.F
1755    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1756    C        Global thermohaline circulation. Part I:
1757    C        Sensitivity to atmospheric moisture transport.
1758    C        J. Climate 12(1), 71-82
1759    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1760    C        Global thermohaline circulation. Part II:
1761    C        Sensitivity with interactive transport.
1762    C        J. Climate 12(1), 83-91
1763    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1764    C        Destabilization of the thermohaline circulation
1765    C        by atmospheric eddy transports.
1766    C        J. Climate 7(12), 1870-1882
1767    o Will need long integration testing.
1768    checkpoint53b_pre
1769    
1770    o created pkg/mom_common in preparation for variable viscosity code
1771    o renamed and split ini_mnc_io
1772    o pkg/land: only liquid water can diffuse or run-off
1773    o AIM using land: soil wetness availability account for snow
1774    o added printMapIncludesZeros to EEPARMS namelist
1775    
1776    checkpoint53a_post
1777    o restore TAMC compatiility for exf_constants.h
1778      (no usage of _d in .h)
1779    o Additional storing in KPP in an attempt to fix
1780      TAMC problem with adjoint of KPP code.
1781      (no success...)
1782      Identical code works fine with TAF.
1783    o Fixed verification/natl_box_adjoint experiments.
1784      Initial conditions for Experiments 4 and 5 are now
1785      set to "SEAICE_initialHEFF=0", which is more reasonable,
1786      and hence gives results closer to that of Experiment 2.
1787      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1788    
1789    checkpoint53
1790    o stable checkpoint with up to date adjoint
1791      TLM tests only run for 1st grdchk at the moment. Its unclear if
1792      this is a code problem or a problem with resetting code for g_
1793      variables that is being autogenerated wrong.
1794      Otherwise:
1795       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1796       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1797         are both still in chaos following their security messes.
1798    
1799    checkpoint52n_post
1800    o various build (mostly genmake2) changes including:
1801      - ability to build/run more easily within Cygwin and MacOS X
1802      - more complicated Makefiles with a stronger dependence on Gnu Make
1803    o pkg/seaice modifications
1804      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1805        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1806        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1807      - changed proxy for geostrophic velocity and updated
1808        verification/lab_sea/results/* accordingly
1809      - removed ADI dynamic solver from pkg/seaice
1810      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1811        they caused a segmentation fault under certain circumstances
1812      - removed unused field WATR
1813    o bug fix in exf-package:
1814      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1815         now reflect that.
1816    o small fixes in the cal-package:
1817      - set reference date to first of January for the 'model'-calendar
1818      - failing of cal_CheckDate in cal_FullDate now actually results in a
1819        warning
1820    o small modifications in exf-package to increase flexibility:
1821      - change climtempfreeze from a constant to a runtime parameter that
1822        is specified in data.exf_clim (default = -1.9)
1823      - introduce runtime parameter windstressmax (default = 2.0) that is
1824        specified in data.exf
1825    o fix in pkg/thsice:
1826      - update Evap (Tsf changes) to be consistent with Latent heat flux
1827      - maintain snow precipitation unchanged (even if Tsf >=0).
1828     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1829    
1830    checkpoint52m_post
1831    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1832      this does not change any of the results, because myIter=0 in swfrac always
1833      lead to jwtype=2 (the default anyway), but the call makes little sense
1834      as a default
1835    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1836    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1837      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1838    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1839    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1840    o extending useSingleCpuIO option to work with new exch2 I/O format
1841      - old-style, missing-tile I/O is still accessible by defining CPP
1842        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1843    o monitor package can write to NetCDF files and/or STDOUT
1844    o fix re-definition bug in MNC_GRID_INIT_ALL()
1845    o doc/api_reference added
1846      - a framework for building an API Reference Manual using all
1847        the "protex" comments embedded in the code
1848      - see pkg/generic_advdiff, pkg/mnc for examples
1849    o MNC:
1850      - make myThid the last argument for all subroutines
1851      - new default for the grid files: NO halos
1852      - add useMNC and other run-time flags
1853      - separate per-file-group handling of the unlimited dimension
1854      - early initialization of MNC w/ flags read at the eeboot stage
1855        and lookup tables set in initialize_fixed
1856      - write all MNC output to a freshly-created directory
1857    o thermodynamics sea-ice (thsice) is now tested with testreport.
1858    o test exp. advect_cs: use the standard cs32 grid ; update output.
1859    o Added functionality to grdchk:
1860      pick global i,j,k position (or nearest wet) where to perform check.
1861    
1862    checkpoint52l_post
1863    o new land formulation:
1864      a) use ground enthalpy as prognostic variable to ensure exact
1865         energy conservation.
1866      b) account for water temperature and for latent heat of freezing
1867         in all processes (rain, run-off, ground storage)
1868      c) compute surface and ground temperature implicitly.
1869    o aim_v23 modification for new land model:
1870      a) Treat separately land / ocean / sea-ice surface fluxes
1871         to allow implicit computation of land & sea-ice surface temp.
1872      b) add snow precipitation.
1873    checkpoint52l_pre
1874    
1875    o fix problem (when 1 tile is empty) in min/max monitor.
1876    o fix bug in timeAve (u,vZetatave in common block)
1877    o no restoring terms under ice for pkg/seaice
1878    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1879    o bug fix for pkg/seaice pickups
1880    o change MNC call locations and add coordinate attributes
1881    o mask vorticity at the corner ; affects global_ocean.cs output
1882    o fix ini_curvilinear_grid ; test CS experiments with mpi
1883    o aim.5l_cs: modify sea-ice fraction input file ; update output
1884    o exf: Adding simple range check routine for exf fields after read
1885    
1886    checkpoint52k_post
1887    o removed top-level directory "diags"
1888      - we migrated these functions to pkg/timeave a long time ago
1889    o fixed bug introduced in pkg/monitor
1890    o accuracy ctrlprec = 32 insuffient for gradient checks using
1891      averaged fields (I/O via cost_averages)
1892      -> use ctrl.h in active_file*.F to control I/O precision.
1893    o paramter list of CALL ADTHE_MAIN_LOOP
1894    o added initial do_the_model_io to ecco
1895    o set all ...Freq to zero after cost_final
1896      taveFreq, dumpFreq, pChkptFreq
1897    o MAIN and ECCO differentiability restored
1898    
1899    checkpoint52j_post
1900    o fix nchklev in tamc.h for global_ocean...
1901    o Bringing flow and store directives up-to-date
1902    o Really weird thing!
1903      call do_the_model_io from the_main_loop with parameters
1904      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1905      TAF places a faulty re-call of initialise_varia
1906      after cost_final call which should not be there!
1907    checkpoint52j_pre
1908    
1909    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1910      error messages
1911    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1912    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1913      debug output
1914    o modfied mdsio_writefield.F to handle non-global files under exch2
1915    o update AIM Cubed-Sphere exp (aim.5l_cs):
1916      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1917    o update AIM Equatorial Channel exp:
1918      use standard aim_v23 pkg and change the SST fields to be more realistic.
1919    o globalFile now works with exch2
1920    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1921      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1922    o limit timeave output for hi-res integrations
1923    
1924    checkpoint52i_post
1925    o removed CPP_EEOPTIONS.h from verification/*/code
1926    o updated the tiling for global_ocean_pressure
1927    checkpoint52i_pre
1928    
1929    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1930      the old pkg/aim).
1931    
1932    checkpoint52h_pre
1933    o shortened offending lines in exch2_send_rx?.template
1934    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1935    o genmake2: add build & execute test for NetCDF code
1936    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1937      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1938    o added useSingleCPUIO flag to monitor.F and mon_out.F
1939    o added temporary hack for sea-ice dynamics on the cube:
1940      metric terms are ignored and it is assumed that
1941      there is no sea-ice on cube faces 1, 2, 4, and 5.
1942    
1943    checkpoint52f_post
1944    o added exch2 cube routines to pkg/exch2
1945    o modified hs94.cs-32x32x5 to use it
1946    o added new grid files to hs94.cs-32x32x5
1947    checkpoint52f_pre
1948    
1949    checkpoint52e_post
1950    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1951      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1952    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1953      to work with implicit vertical advection and AB ;
1954    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1955    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1956     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1957    checkpoint52e_pre
1958    
1959    o fix bug in impldiff when Nr=1 or Nr=2.
1960    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1961    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1962    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1963      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1964    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1965    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1966    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1967    
1968    checkpoint52d_post
1969    o re-tiled many expts to allow comparison in multi-processor mode
1970      - updated output accordingly
1971      - changed hs94.128x64x5 to use intial T from file rather than use the
1972        random number generator
1973    o add infrastructure in model routines for fizhi and gridalt packages
1974    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1975    o changes to permit hi-res, cubed-sphere, configuration
1976      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1977      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1978      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1979        of surface winds for the cube
1980      (A verification experiment, based on global_ocean.cs32x15, but with
1981       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1982       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1983       complete with example surface forcing files and matlab scripts to look
1984       at the output and compare it with that of global_ocean.cs32x15.)
1985    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1986       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1987       to conform to the common rule.
1988    o check-in the first version of the coupler + interfaces for multi-components
1989       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1990       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1991       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1992       - ocean and atmos. share the same horizontal grid (no interpolation).
1993       - exchanges between component and coupler is done in forward_step
1994    o new verification experiment, cpl_aim+ocn:
1995       coupled ocean - AIM atmosphere on cs32 grid.
1996    
1997    checkpoint52d_pre
1998    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1999    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2000    
2001    checkpoint52c_post
2002    o Fixing OPTIONS files for use of exf:
2003      - ALLOW_ECCO not needed
2004      - ECCO_CPPOPTIONS.h should not be included from
2005        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2006        as has been the case in the past
2007      - All cal/exf related options are currently set in
2008        single header file. Should remain so until we
2009        agree on a consistent new policy.
2010    o Removed all CPP options for cal package.
2011      cal has no more CPP options.
2012    o modified STOREs in GAD_ADVECTION
2013    o corrected key comp. for passkey
2014    
2015    checkpoint52b_post
2016    o new version: "thsice" of thermodynamic sea-ice pkg:
2017     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2018     - modify fluxes but do not change theta directly;
2019     - light cleaning of bulk_force pkg (still needed with thsice).
2020     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2021       + output_thsice.txt to test thsice & bulk_force pkgs.
2022    o put back grid & coriolis monitor output.
2023    checkpoint52b_pre
2024    
2025    o call "do_the_model_io" at the beginning (=> dump initial state)
2026    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2027    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2028      (need info on NUMBER_OF_PTRACERS)
2029    o missing PTRACERS headers in some routines
2030    o default tamc.h in pkg/autodiff supposed to crash
2031      to ensure proper customization
2032    
2033    checkpoint52a_post
2034    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2035      - moved surfaceTendencyTice from pkg/seaice to main code
2036      - subroutine FREEZE_SURFACE now limits only surface temperature
2037        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2038        => new output.txt for global_ocean.cs32x15 & global_with_exf
2039      - keep the old version of FREEZE for backward compatibility;
2040        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2041      - corresponding modifs for TAF directives
2042    o added surface flux output variables to TIMEAVE_STATVARS
2043    o time-averaged output for pkg/ptracers
2044    o fix problem with ECCO-related divided adjoint
2045      snapshot file was missing some ad-variables,
2046      but no warning issued by TAF
2047    
2048    checkpoint52a_pre
2049    o some bug fixes for #undef REAL4_IS_SLOW
2050    
2051    checkpoint52 = ecco_c52_e35
2052    o after testing adjoints of checkpoint51u_post
2053    
2054    checkpoint51u_post
2055    o this is the post-merge tag of the ecco-branch
2056      (needs another clean checkout and re-testing)
2057    o various natl_box_adjoint configs and results
2058      but no input fields
2059    o obcs adjoint not yet merged!
2060    o adding ECCO global 1x1 and 2x2 degree configs
2061    o updated/extended some store directives for seaice
2062    o pkg/ecco now containes ecco-specific part of cost function
2063    o top level routines the_main_loop, forward_step
2064      supersede those in model/src/
2065      previous input data.cost now in data.ecco
2066      (new namelist ecco_cost_nml)
2067    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2068    
2069    checkpoint51t_post
2070    o this is the pre-merge tag of the ecco-branch
2071    
2072    checkpoint51s_post
2073    o cleanup: removed various obsolete #define-s
2074    o pkg/grdchk
2075      - renamed 'ph-grd 3' to 'grad-res'
2076      - merged from ecco-branch
2077        (remaining bug fixes for obcs gradient checks)
2078      - additional high-precision output for testreport
2079        (grep for 'precision_grdchk_result')
2080    
2081    checkpoint51r_post
2082    o cleaned up or removed CPP_OPTIONS.h files
2083    o updated results for some of the tests to reflect the new
2084      optfiles (-ieee: -O0 instead of -O3)
2085    
2086    checkpoint51q_post
2087    o cd_code:
2088      - moved cd_scheme.F -> cd_code_scheme.F
2089      - separate read_checkpoint from cd_code_ini_vars.F
2090      - separated cd_code part from write_checkpoint
2091      - updated AD_SOURCE, generated .flow
2092      - added CD_CODE_VARS.h to the_main_loop
2093      - Moving cd_code specific store dir.s to pkg/cd_code
2094    o ctrl package totally restructured
2095      - pack/unpack now optional and decoupled from
2096        xx_/adxx_ I/O
2097      - ctrl_pack/unpack cleaned
2098        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2099      - confined inclusion of AD_CONFIG.h to where necessary.
2100    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2101    
2102    checkpoint51p_post
2103    o create initial cd_code package
2104      - WARNING: the initialization of fields within packages
2105        is broken because INI_FIELDS (where READ_CHECKPOINT is
2106        called) is called *before* PACKAGES_INIT_VARIABLES.
2107        This seems to be backwards since
2108        1) its important to initially zero the entire field including
2109           the "halo" region
2110        2) zeroing needs to be done *before* reading pickup info
2111           and the pickup call might or might not happen in any
2112           particular run
2113      - this needs an overhaul for R2
2114    o cleanup verification/*/code/GMREDI_OPTIONS.h
2115    o cleanup testreport
2116    
2117    checkpoint51o_post
2118    o bringing AD-related verif's up to date with genmake2
2119      - carbon/
2120      - global_ocean.90x40x15/
2121      - hs.94.1x64x5/
2122      - (front_relax/ )
2123    o (more) consistent directory structure for AD-related verif.'s
2124    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2125    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2126    o bug fix in find_alpha.F for MDJWF:
2127      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2128        change rho -> rho-rhoConst
2129      - replace call find_rho to find_rhonum
2130    o initialisation of rFlx extended to full array (required by TAF)
2131      and shifted to thermodynamics
2132    o removed PTRACERS.h in ptracers routine
2133    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2134    o Correcting initialisations for fVerU, fVerV.
2135    o helping TAF to recognize dependency on kUp for
2136      fVerU, fVerV
2137    o Replacing delZ by delR in pkg/ctrl/
2138    checkpoint51o_pre
2139    
2140    o undid all of cp51 pending some cleanups and discussion
2141    o added the [#include "AD_CONFIG.h"] statement to all files that need
2142       it for adjoint/tl #defines
2143     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2144     o removed tools/genmake since it no longer works
2145    
2146    checkpoint51n_post
2147    o modifications to make FREEZE flux visible to pkg/kpp
2148      - moved surfaceTendencyTice from pkg/seaice to main code
2149      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2150      - subroutine FREEZE now limits only surface temperature
2151        (this means new output.txt for global_ocean.90x40x15,
2152         global_ocean.cs32x15, and global_with_exf)
2153    o added surface flux output variables to TIMEAVE_STATVARS
2154    
2155    checkpoint51n_pre
2156    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2157    o added [#include "AD_CONFIG.h"] to all files that use the following
2158      defines:
2159      - ALLOW_ADJOINT_RUN
2160      - ALLOW_TANGENTLINEAR_RUN
2161      - ALLOW_ECCO_OPTIMIZATION
2162    
2163    checkpoint51m_post
2164    o incorporating changes to get TAMC/TAF working in genmake2
2165      - added new TAMC/TAF targets to the Makefile
2166      - various cleanups related to package handling
2167      - these changes should have no impact on the forward model
2168    
2169    checkpoint51l_post
2170    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2171     - faster algorithm for cal_addtime.F
2172     - higher precision arithmetic, where needed
2173     - pkg/exf *startdate variables changed from calendar date to
2174       model integration time
2175    
2176    checkpoint51l_pre
2177    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2178    o enable to apply restoring on S & T only in a latitude band.
2179    o update output (external_forcing_surf modif. change truncation errors)
2180       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2181    
2182    checkpoint51k_post
2183    o change default to: useNHMTerms=.FALSE.
2184     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2185       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2186     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2187        exp1, ideal_2D_oce
2188     - change data file of oceanic exp (leave the results unchanged for now)
2189       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2190    o set gravitySign automatically according to the vertical coordinate used
2191      (and change sign: back to "logical" value: +1 when R increases downward)
2192    o added an include barrier to the default CPP_OPTIONS.h and
2193      removed the #include "PACKAGES_CONFIG.h" from it
2194    o fix a bug in mom_fluxform (from chk51j_post)
2195    
2196    checkpoint51j_post
2197    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2198    o adjusted some flow directives (dynamics, thermodynamics)
2199    o added cubed-sphere case to test cost function
2200    o heckpoint_lev?_directives.h now include
2201      pkg-specific directives, whenever those are enabled.
2202    o Moving pkg-specific flow directives to corresponding pkg
2203      Moving pkg-specific differentiation list to corresponding pkg
2204      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2205      ---> conventions are
2206           - pkg_ad.flow
2207           - pkg_ad_diff.list
2208           - pkg_ad_check_lev?_dir.h
2209    
2210    checkpoint51i_post
2211    o merge of the branch-genmake2
2212      - knowingly breaks the older genmake
2213      - automatic generation of all ALLOW_${PKG_NAME} defines
2214      - new testreport supersedes older testscript
2215    o large number of package inclusion and header cleanups
2216    checkpoint51i_pre
2217    
2218    o new output for adjoin of global ocean vector invariant
2219    o fix for checkpoint of thermodynamic seaice and bulk_force
2220    o Steph gchem various cleanups
2221    
2222    checkpoint 51h_pre
2223    o fixed some single quotes
2224    o modify gchem pkg to be more versatile
2225    o modifications to clean up dic pkg
2226    o add pkg/cfc
2227    
2228    checkpoint51g_post
2229    o provide links for ARPACK and ADM*TLM
2230    o start removing verification/vero/
2231    o update AD-related stuff
2232      (in particular some IF-statements in model/src/ routines)
2233    o adding to verification/global_ocean.90x40x15/ adjoint of
2234      vector invariant setup
2235    
2236    checkpoint51f_post
2237    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2238    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2239      of tracer Green's fucntions for ocean inversion project.
2240    
2241    checkpoint51f_pre
2242    o Added on-the-fly spatial interpolation capability
2243        "USE_EXF_INTERPOLATION" to pkg/exf.
2244      - This is a temporary Cartesian-grid hack until
2245        the super-duper ESMF coupler becomes available.
2246      - See verification/global_with_exf/README for usage example.
2247      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2248        flags and modified pkg/seaice accordingly.
2249    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2250        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2251        non-local transport term.
2252    
2253    checkpoint51e_post
2254    o pkg/mom_vecinv:
2255      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2256      - add time-ave diagnostic of vorticity advection.
2257    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2258    o atmospheric geopotential: - include water vapor effect;
2259                                - use p^kappa in p* scaling.
2260    o land pkg: read initial state from files.
2261    o AIM : add stratospheric drag in the upper level
2262    
2263    checkpoint51d_post
2264    o change function ILNBLNK (=> last non-blank char.) to return zero
2265      (instead of the string length) when the string. char is empty
2266    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2267    o modif's to restore TAMC compatibility
2268      - avoid "_d" constructs in PARAMETER declarations
2269      - avoid interrupting lines by comment lines
2270    o Use cluster local disks for purely local I/O
2271      vs. globally visible disks needed for ctrl stuff
2272      (merged from ecco-branch)
2273      - new active_file_loc... and mdsio_..._loc routines
2274      - affected packages: autodiff, ctrl, grdchk, mdsio
2275    
2276    checkpoint51c_post
2277    o introducing integer flag debugLevel
2278      - debLevZero: suppress all output
2279      - debLevA: standard
2280      - debLevB: equivalent to current debugMode=.TRUE.
2281    o introducing pathname variable mdsioLocalDir for mdsio
2282      that can be specified at runtime
2283      (relevant for cluster I/O to local disk)
2284    `
2285    >>>checkpoint51b_post
2286    adjoint of ptracers
2287    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2288    o extended state in checkpoint_lev?, etc.
2289    o alternative ctrl/cost with tr1 or ptracer
2290    o new comlev1_bibj_ptracers
2291    o new ptracers.flow
2292    o made ptracers_forcing same as external_forcing_s
2293    o added verification for adjoint with ptracers
2294      - adm. grdchk fail so far
2295      - tlm. grdchk OK
2296      - checked tapelev/comlev recomputations: OK
2297    <<<checkpoint51b_pre
2298    
2299    checkpoint51a_post
2300    o added code for biogeochemistry package
2301      - new pkgs: dic, gchem
2302      - new subroutine in ptracers
2303    o modify code for biogeo packages
2304      - in model/src and pkg/ptracers
2305    
2306    checkpoint51
2307    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2308      - autodiff, ctrl, exf, grdchk, seaice
2309      kept separate packages
2310      - cost, ecco, obcs
2311    o updating verification/internal_wave, verification/lab_sea
2312      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2313    
2314    checkpoint50i_post
2315    o Preparing next differentiable checkpoint and sync
2316      of MAIN vs. ecco-branch
2317      - 1st step: this one is differentiable
2318      - 2nd step: next(! not this) checkpoint will have updated packages
2319                  from ecco-branch)
2320    
2321    checkpoint50h_post
2322    o new package "land": provide surface BC for AIM.
2323    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2324    o AIM: use true log-P extrapolation for near surface temp (= as in
2325        F.Molteni paper) ; update aim.5l_cs output.
2326    o New variable in PARM03 for more flexible pickups
2327    o somewhat cleaned package initialisation sequence for
2328      ctrl/ cost/ ecco/ in packages_... routines
2329    
2330    checkpoint50g_post
2331    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2332      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2333      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2334        made the default because of faster convergence than ADI
2335    
2336    checkpoint50f_post
2337    o exf totally restructured
2338      - replaced all exf_set_ routines by one generic exf_set_gen.F
2339        and made sure it's still differentiable
2340      - split exf_getffields.F into new exf_bulkformulae.F
2341      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2342      - updated adjoint/makefile and relevant verif. accordingly
2343    
2344    checkpoint50f_pre
2345     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2346          + change Evap over land. (update aim.5l_cs output)
2347     o added missing .cvsignores and made uniform across expts
2348     o changed configuration of tidal_basin_2d expt
2349     o added pkg/debug functions for tracing code in fatal crashes
2350     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2351     o new fn in pkg/monitor to stop model if solution grows too big
2352     o removed lots of single quotes from comments
2353    
2354    checkpoint50e_post
2355    o make KPP work with PTRACERS
2356     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2357       nearly a copy of kpp_transport_s
2358     - there is no analogue to SurfaceTendencyS, so I have to use
2359       gPtr(of the surface layer) instead
2360    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2361    checkpoint50e_pre
2362    
2363    checkpoint50d_post
2364    o change kpp output from multiple-record state files to single-record state
2365      files analogous to write_state.F
2366    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2367      analogous to the cg2d-related output.
2368    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2369      so that writing to internal file fn (with length 512) fails.
2370    checkpoint50d_pre
2371    
2372    checkpoint50c_post
2373    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2374    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2375    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2376    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2377    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2378    
2379    checkpoint50c_pre
2380    Merging from release1_p13:
2381    o bug fix for pkg/seaice dynamic solver
2382    o Added SEAICE_initialHEFF to pkg/seaice
2383    
2384    checkpoint50b_post
2385    o store u*,v* in gU,V instead of in guNm1,gvNm1
2386    o in order to put the momForcing out of the Adams-Bashforth:
2387      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2388      to timestep.F
2389    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2390    o re-generate output for highly sensitive test-exp:
2391       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2392    
2393    checkpoint50b_pre
2394    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2395    o corrected CPP option mismatch in exf_Bulk... functions for case
2396      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2397    
2398    checkpoint50a_post
2399    o Bug fix for merging between c50 and KPP.
2400      ikey was passed from thermodynamics to kpp_calc via
2401      common block rather than being recomputed in kpp_calc,
2402      in contradiction with new key itdkey.
2403      New key ikppkey created, and tamc.h headers updated.
2404    
2405    checkpoint50
2406    - 2nd step of merge with ecco-branch:
2407      merge changes in ecco-branch back into main trunk
2408    - bug fix in find_alpha
2409    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2410    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2411    - merged some sliced AD support routines
2412    
2413    checkpoint49
2414    merged from ecco-branch:
2415    o exf:
2416      - Enable initialisation of forcing fields to constant
2417        (runtime) values.
2418      - in exf_getffields.F
2419        Reduce i-/j-loop to interior domain, discarding overlaps.
2420        That also fixes wrong TAF-key computations for key_1, key_2
2421        with bulf formulae.
2422      - exf_init.F modify #ifdef for exf_init_evap
2423      - exf_getffieldrec.F, ctrl_getrec.F
2424        The following INT-usages are not safe:
2425          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2426          fldcount = int(fldsecs/fldperiod) + 1
2427        and were modified.
2428    o autodiff: checkpoint_lev...
2429      - updated storing for bulk formulae (some arrays were missing)
2430      - added state for seaice package
2431      - synchronized with main branch
2432    o DIVA:
2433      Modif.s in
2434      - the_main_loop.F
2435      - the_model_main.F
2436      and added cost_final_restore.F cost_final_store.F
2437      o With these changes, it is possible to fully separate
2438        the first forward run to compute the cost function (mdthe_main_loop)
2439        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2440        into separate model executions.
2441        This enables better tuning of DIVA to given queue sizes.
2442      o Loss of cost function value in consecutive DIVA runs is
2443        fixed by storing to 'costfinal' file.
2444      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2445        beginning/end of adjoint integration is accounted for.
2446      The current changes apply to TAF-1.4.26.
2447      TAF has one remaining bug, requiring one manual change
2448      (see MITgcm manual).
2449    o cal: synchronized between MAIN and ecco-branch
2450    
2451    checkpoint48i_post
2452    o Changes to restore differentiability of code w.r.t. previous tag
2453      (mostly adding new routines to make list and replacing
2454      pressure by totPhiHyd).
2455    o Updated and merged grdchk package
2456      - has both ADM and TLM checks
2457      - works for single- and multi-proc.
2458      - output cleaned
2459      - worked successfully for parallel DIVA
2460    o genmake:
2461      - Adding -platform=SP4
2462      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2463    o Modif. for DIVA:
2464      ctrl_unpack should not be called in intermediate DIVA interval.
2465      (similar thing would apply for active files such as
2466      tbar, sbar, psbar, which should not be reinitialised;
2467      only relevant for ecco-branch)
2468    
2469    checkpoint48h_post
2470    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2471    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2472    o Added SEAICE_initialHEFF to pkg/seaice
2473    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2474    
2475    checkpoint48g_post
2476    --- EOS:
2477    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2478      store total Potential in totPhyHyd for diagnostics & EOS.
2479    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2480    --- Pressure/geopotential gradient:
2481    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2482    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2483      ( changes results of global_ocean_pressure )
2484    o NLFS + z-coord.: add eta*Rho' contribution.
2485    o accurate phiHyd when using interface-W at the middle between 2 centers
2486     ( changes results of ideal_2D_oce )
2487    o includes r* 2nd term in potential gradient.
2488    
2489    checkpoint48f_post
2490    Merging from release1_p12:
2491    o Modifications for using pkg/exf with pkg/seaice
2492      - improved description of the various forcing configurations
2493      - added basic radiation bulk formulae to pkg/exf
2494      - units/sign fix for evap computation in exf_getffields.F
2495      - updated verification/global_with_exf/results/output.txt
2496    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2497      (SBO) core products, including oceanic mass, center-of-mass,
2498      angular, and bottom pressure (see pkg/sbo/README.sbo).
2499    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2500      to avoid negative values in shallow regions.
2501      - updated verification/natl_box/results/output.txt
2502      - updated verification/lab_sea/results/output.txt
2503    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2504    o Added useSingleCpuIO option (see PARAMS.h).
2505    o Updated useSingleCpuIO option in mdsio_writefield.F to
2506      work with multi-field files, e.g., for single-file pickup.
2507    o pkg/seaice:
2508      - bug fix in growth.F: QNET for no shortwave case
2509      - added HeffFile for specifying initial sea-ice thickness
2510      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2511    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2512      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2513    o pkg/seaice:
2514      - adjoint-friendly modifications
2515      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2516    
2517    checkpoint48e_post
2518    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2519    o dynamics: change definition of computational domain & adapt mom_fluxform
2520      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2521    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2522        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2523        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2524        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2525        inverted_barometer solid-body.cs-32x32x1
2526      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2527    
2528    checkpoint48d_post
2529    o in preparation for r*:
2530     a) use pre-computed gradient of hydrostatic potential:
2531        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2532     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2533        => affects results of glob_oce_pressure (different truncation error)  
2534      update output.txt of ideal_2D_oce & global_ocean_pressure
2535    
2536    checkpoint48d_pre
2537    o in preparation for r*:
2538      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2539      pass the 2 comp. of the grad. as arguments to momentum S/R.
2540      but for the moment, only used if it does not change the results.
2541    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2542    
2543    checkpoint48c_post
2544    Modifications in treatment of initial flux forcing controls
2545    to avoid extra storing of flux fields.
2546    
2547    checkpoint48c_pre
2548    o Added tidal_basin_2d experiment (currently 1D!)
2549    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2550    
2551    checkpoint48b_post
2552    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2553     (modification to pressure gradient not yet implemented)
2554    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2555      (for U & V) that are used for vertical advection of momentum.
2556    
2557    checkpoint48a_post
2558    o In preparation for r*, use temp. array to compute vertical transport
2559       in flux-form momentum pkg. => change results of few test-exp.
2560      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2561                        lab_sea, natl_box & plume_on_slope
2562    
2563    checkpoint48
2564    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2565    
2566    checkpoint47j_post
2567    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2568    o moved adexch from forward_step to addummy_in_stepping
2569    o added exch in ctrl_map_...
2570    o aveFreq.=0. at end of cost_final to avoid overwrite in
2571      reverse checkpointing loop
2572    o Yet more changes in gmredi:
2573      * adgmredi_calc_tensor
2574        avoiding all recomputation of gmredi_slope_limit
2575      * adgmredi_x/y/rtransport
2576        added flag for excessive storing to avoid recomp. of
2577        u/v/rtans, dTdx/y/z
2578        -> this is not really necessary and very memory-consuming
2579      * adgmredi_slope_psi:
2580        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2581      * gmredi_slope_limit
2582        re-activated full calculation of taperfct for case 'ac02'
2583    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2584    
2585    checkpoint47i_post
2586    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2587    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2588      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2589    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2590    o gmredi: fix few bugs.
2591    
2592    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2593    This will be a good checkpoint to plug into the ecco-branch.
2594    o few modif.'s to get latest version adjointed
2595      (mainly kick out code in ini_linear_phisurf)
2596    o modif's to run adjoint with exactConserv
2597    o case GM_BOLUS_ADVEC should be cleaned
2598      S/R gmredi_slope_psi should be cleaned
2599    o verification/carbon now has exactConserv=.TRUE.
2600    
2601    checkpoint47g_post
2602    o time-average AIM output: becomes independent from statvars time-average
2603      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2604    o After TAF bug fix:
2605      Tested adjoint of gmredi package.
2606      Tests were done with checkpoint47 rather than with latest
2607      checkpoint47f_post since the latter is broken for the adjoint
2608      verification/carbon/ contains both ADM and TLM gradient checks.
2609    Here they are, before they get changed/lost/stolen.
2610    Mostly modif.'s to fix numerical sensitivities.
2611    Gradient checks OK for
2612    - GM_taper_scheme:
2613      * clipping
2614      * ac02
2615      * linear
2616      * glw91
2617      * dm95
2618      * ldd97
2619    - GMREDI_OPTIONS:
2620      * GM_VISBECK_VARIABLE_K
2621      * GM_NON_UNITY_DIAGONAL
2622      * GM_EXTRA_DIAGONAL
2623      * GM_BOLUS_ADVEC
2624    in conjunction with data.gmredi parameters to be checked in
2625    in a few minutes under verification/carbon/code/
2626    
2627    checkpoint47f_post
2628    Merging from release1_p10:
2629    o modifications for using pkg/exf with pkg/seaice
2630      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2631        and SEAICE_EXTERNAL_FLUXES
2632      - pkg/exf CPP options EXF_READ_EVAP and
2633        EXF_NO_BULK_COMPUTATIONS
2634      - usage examples are Experiments 8 and 9 in
2635        verification/lab_sea/README
2636      - verification/lab_sea default experiment now uses
2637        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2638    
2639    checkpoint47e_post
2640    o created a tag prior to creating a branch
2641    
2642    checkpoint47d_post
2643    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2644      at the bottom boundary had an erroneous half slip boundary condition
2645    o added bottom drag and no slip boundary condition capabilities to
2646      oceanic pressure coordinates code
2647    o added new verification experiment global_ocean_pressure, this experiment is
2648      also described in the tutorial section of the manual
2649    checkpoint47d_pre
2650    
2651    checkpoint47c_post
2652    o Added a verification experiment for a global cubed-sphere ocean run
2653      -  verification/global_ocean.cubed32x32x30
2654      -  uses pkg/therm_seaice and pkg/bulk_forcing
2655    
2656    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2657    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2658      when using P-coordinate; only implemented for atmospheric config.
2659    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2660      NOTES: requires option NONLIN_FRSURF to be "#define".
2661    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2662    
2663    checkpoint47b_post
2664    Merging from release1_p9:
2665    o pkg/seaice
2666      - removed GOTO's and added taf directives
2667      - double precision constants to reduce the g77 (Linux)
2668        to F77 (SGI) differences reported in release1_p8
2669    o tools/genmake
2670      - added SGI options
2671    o verification/testscript
2672      - updated to that of checkpoint47a_post
2673    o verification/global_ocean.90x40x15/input/eedata
2674      - modified for SGI f77 compatibility
2675    o verification/lab_sea
2676      - added description of sea-ice model
2677      - added missing matlab routines
2678      - added test of thermodynamics parallelization
2679    
2680    checkpoint47a_post
2681    o new pkg: aim_v23
2682     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2683       for now, keep the same surface forcing as before.
2684     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2685     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2686     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2687    o add diagnostic of surface correction term in monitor output
2688    
2689    o bulk_force and therm_seaice
2690    - Two packages:  bulk_force (Bulk forcing)
2691      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2692    - Earlier integration from Stephaine Dutkiewicz
2693      and Patrick Heimbach.
2694    - Two ifdef statements for compile time,
2695       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2696    
2697    checkpoint47
2698    differentiable version of checkpoint46n_post
2699    o bug fix in quasihydrostaticterms
2700    o * "clean" adjoint code (in terms of extensive recomputations)
2701        can now be obtained for all GMREDI options (i.e. for
2702        - GM_VISBECK_VARIABLE_K
2703        - GM_NON_UNITY_DIAGONAL
2704        - GM_EXTRA_DIAGONAL
2705        - GM_BOLUS_ADVEC )
2706      * However, wrong gradient check problem remains unsolved.
2707      * New CPP options have been introduced for different
2708        tapering schemes
2709    o external_fields_load now part of differentiation list
2710    o pressure needs multiple storing;
2711      would be nice to have store_pressure at beginning or
2712      end of forward_step, e.g. by having phiHyd global (5-dim.)
2713      (NB: pressure is needed for certain cases in find_rho,
2714      which is also invoked through convective_adjustment).
2715    o recomputations in find_rho for cases
2716     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2717    o #define ATMOSPHERIC_LOADING should be differentiable
2718    o ini_forcing shifted to begining of initialise_varia
2719    o Incorporating QNVS line search routines into MITgcm
2720      (this is separate code, and therefore not under pkg)
2721      lsopt/, optim/
2722    o Updated verification/carbon/
2723      - #define GM_VISBECK_VARIABLE_K
2724      - GM_taper_scheme    = 'ldd97'    
2725    
2726    checkpoint46n_post
2727    Merging from release1_p8:
2728    o verification/natl_box:
2729      updating new external_fields_load routine
2730    o New package: pkg/seaice
2731      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2732      The sea-ice code is based on Hibler (1979-1980).
2733      Two sea-ice dynamic solvers, ADI and LSR, are included.
2734      In addition to computing prognostic sea-ice variables and diagnosing
2735      the forcing/external data fields that drive the ocean model,
2736      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2737      The implied surface heat flux is then stored in variable
2738      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2739      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2740      non-local transport term.  Because this call precedes model
2741      thermodynamics, temperature under sea-ice may not be "exactly" at
2742      the freezing point by the time theta is dumped or time-averaged.
2743      N.B.: fairly large differences in accuracy occur across
2744            different platforms/compilers; comparison between
2745            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2746            generated output gives:
2747       T           S           U           V
2748      C D M    c        m  s        m  s        m  s        m  s
2749      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2750      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2751      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2752    
2753      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2754    o GAD:
2755      - generated new common blocks to account for call of
2756        same gad routines with differing traceridentities
2757        (needed to modify tracerIdentity indices in GAD.h)
2758      - generated separate common blocks for case useCubedSphereExchange
2759        (Department of Futurology)
2760      - parameter lists to gmredi_?transport: added tracerIdentity
2761      - added new key indices to tamc.h
2762    o external_fields_load:
2763      - added this routine to TAF list
2764      - needed to make some common blocks global and additional storing
2765        along the same lines as exf package (checkpoint_lev?_directives.h)
2766    o exf:
2767      updated external forcing package
2768      - bug fixes carried over from ecco-branch
2769        (missing OBCS_OPTIONS.h in two routines)
2770      - enable easy to use "no forcing".
2771      - added exf I/O for atmospheric loading
2772      - added exf I/O for runoff data
2773      - transfered scaling between exf <-> MITgcm to exf namelist
2774    o Adding new verification experiment global_with_exf.
2775      This verification experiment is almost identical to the
2776      global_ocean.90x40x15 experiment, except that it uses
2777      the exf (and cal) package instead of the
2778      external_fields_load routine (cf README file).
2779    
2780    checkpoint46m_post
2781    o modified testscript to return -- when there are no lines of "%MON" output
2782    o added new flag "quasiHydrostatic" for QH mode
2783      and new routine quasihydrostaticterms()
2784    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2785      New routine: mom_u_coriolis_nh()
2786    o fixed sign of non-hydrostatic metric terms in u and v equations.
2787      Depend on correct sign of gravitySign.
2788    o added work.pc* to .cvsignore in aim directories using ifc
2789    o introduced flag for controllin non-hydrostatic metric terms
2790    o removed gravitySign from PARM04
2791    o switched to g77/ifc from pgf77 in aim experiments
2792    
2793    checkpoint46l_post
2794    o made convective adjustment work with pressure coordinates:
2795     - changed the direction of k-loop in convective_adjustment.F for the
2796       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2797     - adjusted the reference pressure k-index in convective_adjustment.F
2798     - adjusted the convection condition in convect.F (in analogy to
2799       calc_ivdc.F)
2800     - convective_adjustment no longer computes anything on the halos
2801     - removed the warnings about negative salinity from find_rho.F and
2802       find_alpha.F; instead the new routine look_for_neg_salinity, called
2803       at the beginning of find_rho, find_alpha, and find_beta, does a
2804       check of the entire slice, if CPP-option
2805       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2806    checkpoint46l_pre
2807    
2808    checkpoint46k_post
2809    o fixed the verification/global_ocean.90x40x15 experiment:
2810     - new bathymetry (the world according to A., JMC, and M.)
2811     - new initial fields and forcing fields (*.bin files)
2812     - new POLY3.COEFFS (for the next release one should switch to a full
2813       equation of state: JMD95P or MDJWF)
2814     - fixed several errors and redundancies in the data file
2815     - experiment uses looped cells
2816     - added matlab directory with diagnostic scripts for plotting of output
2817    
2818    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2819     - read AIM physics parameters from a file (data.aimphys)
2820     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2821    
2822    checkpoint46j_post
2823    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2824    o move wVel computation at the end of the time step, in S/R integr_continuity
2825    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2826    o update timeave pkg for wVel diagnostic.
2827    checkpoint46j_pre
2828    
2829    checkpoint46i_post
2830    o Clean up AIM package (and keep the results unchanged):
2831      include CPP_OPTION and use IMPLICT NONE in all routines ;
2832      declare all the variables _RL ; use _d 0 for all numerical constants.
2833      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2834    
2835    checkpoint46h_post
2836    o cleaned up the use of rhoNil and rhoConst.
2837      - rhoNil should only appear in the LINEAR equation of state, everywhere
2838        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2839        and the dynamical equations are all divided by rhoConst
2840    o introduced new parameter rhoConstFresh, a reference density of fresh
2841      water, to remove the fresh water flux's dependence on rhoNil. The default
2842      value is 999.8 kg/m^3
2843    o cleanup up external_forcing.F and external_forcing_surf.F
2844      - can now be used by both OCEANIC and OCEANICP
2845    checkpoint46h_pre
2846    
2847     Added code to convert surface volume flux (fresh water) into
2848     a mass flux when using P coordinates in the ocean (OCEANICP).
2849     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2850    
2851    checkpoint46g_post
2852    o Include a new diagnostic variable phiHydLow for the ocean model
2853      - in z-coordinates, it is the bottom pressure anomaly
2854      - in p-coordinates, it is the sea surface elevation
2855      - in both cases, these variable have global drift, reflecting the mass
2856        drift in z-coordinates and the volume drift in p-coordinates
2857      - included time averaging for phiHydLow, be aware of the drift!
2858    o depth-dependent computation of Bo_surf for pressure coordinates
2859      in the ocean (buoyancyRelation='OCEANICP')
2860      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2861        Theta, Salinity, and Pressure in the parameter list. This routine is
2862        presently contained in find_rho.F. This routine does not give the
2863        correct density for 'POLY3', which would be a z-dependent reference
2864        density.
2865    o cleaned up find_rho
2866      - removed obsolete 'eqn' from the parameter list.
2867    o added two new verification experiments: gop and goz
2868      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2869    checkpoint46g_pre
2870    
2871    checkpoint46f_post
2872    o Enable tangent linear (forward mode) gradient checks:
2873      - extended active file handling to g_... files
2874      - added TANGENT_SIMULATION to theSimulationMode
2875      - extended grdchk package accordingly
2876    o added tangent linear setup in verification/carbon/code_ftl
2877    o added adjoint setup in verification/front_relax/code_ad
2878    
2879    checkpoint46e_post
2880    o Added new equation of state -> MDJWF
2881      - EOS of McDougall et al., 2002, JAOT, submitted
2882      - caveat: the equation of state is only valid for a smaller (more
2883        realistic?) range of values than JMD95P/Z and UNESCO
2884      - added masks to the calculation of pressure in store_pressure
2885      - added more check values for density in check_eos (ini_eos.F), some of
2886        the old check values are out of the range of the MDJWF-eos, so don't
2887        expect perfect matches for those
2888    checkpoint46e_pre
2889    
2890    checkpoint46d_post
2891    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2892      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2893      case of pressure coordinates. eosType='JMD95Z' in
2894      combination with buoyancyRelation='OCEANICP' now causes an error.
2895    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2896      in find_alpha/beta.
2897    checkpoint46d_pre
2898    
2899    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2900      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2901    
2902    checkpoint46c_post
2903    o Changes necessary for ocean in p-coordinates
2904     -  Added new buoyancy relation = 'OCEANICP'
2905     -  Added new parameters = gravitySign (this used to be contained inside
2906        the factor dRdZ which I added when we first switched to R coordinates).
2907     X GM/Redi is not compatible (yet)
2908     X bottom drag and no-slip need to be debugged.
2909    checkpoint46c_pre
2910    
2911    checkpoint46b_post
2912    o Added new equation of state -> JMD95Z and JMD95P
2913      - EOS of Jackett and McDougall, 1995, JAOT
2914      - moved all EOS parameters into EOS.h
2915      - new routines ini_eos.F, store_pressure.F
2916    o Added UNESCO EOS, but not recommended because it requires
2917      in-situ temperature (see JMD95)
2918    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2919      unesco.f to be used with POLY3
2920    checkpoint46b_pre
2921    
2922    checkpoint46a_post
2923    o Added (atmospheric) pressure loading
2924      - new field in FFIELDS.h, etc...
2925      - new cpp flag ATMOSPHERIC_LOADING
2926    o Changed hFacC to _hFacC in calc_phi_hyd.F
2927    o Added SHORTWAVE_HEATING to some files for consistency
2928    checkpoint46a_pre
2929    
2930    checkpoint46
2931    further merges from release1_p5
2932    o new ctrl package
2933      - adopted from ECCO environment to enable optimization
2934      - added Eliassen Palm fluxes to controls
2935    o added Eliassen Palm flux controls to gradient check package
2936    o cost package
2937      - Compatible with new ctrl package
2938      - added Eliassen Palm cost hooks
2939      - modif's of existing cost functions
2940    o Adjoint-related bug fixes in kpp:
2941      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2942      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2943    o autodiff package
2944      - flow directives:
2945        + new for S/R do_the_model_io
2946        + enhanced for S/R checkpoint
2947        + new gmredi.flow
2948      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2949        disable adcommon.h/g_common.h by default.
2950      - fixed problem for adjoint of global_max
2951    o modified verification/carbon/
2952    o New setup for adjoint of global_ocean
2953    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2954    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2955    o incorporated hooks for sponge layer code (external_forcing.F)
2956    
2957    checkpoint45d_post
2958    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2959    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2960      (affects plume_on_slope "cg2d" output)
2961    o add new parameter deltaTfreesurf for free-surface time stepping
2962    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2963  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B  o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2964  o change phiMin in exp1 (to agree with documentation)  o change phiMin in exp1 (to agree with documentation)
2965  o add new flags:  o add new flags:

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