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revision 1.60 by jmc, Sun Feb 10 20:07:14 2002 UTC revision 1.946 by dimitri, Fri Jan 25 11:23:06 2008 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/exf: rewrite of exf_getffieldrec.F to properly deal with year
8      transitions for useExfYearlyFields
9    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
10      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
11      subroutines (which could be generated from a template, because they are
12      almost identical), for now they are included in obcs_prescribe_read.F for
13      simplicity
14    o pkg/exf:
15      - add a little more diagnostic to exf_interp_read (in analogy to
16        mds_read_field, can be turned off with debugLevel < debugLevA=1)
17      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
18        ugly but fast by unrolling short inner loops, inserting a unroll=8
19        directive in routine lagran, and splitting a loop and making do while the
20        outermost loop (the latter requires the intoduction of index arrays)
21    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
22    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
23      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
24    o verification/seaice_obcs: updated for restart test and latest options
25    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
26      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
27      for now this is only available for the C-grid code and also within
28      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
29    
30    checkpoint59m
31    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
32      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
33    o gad_som : fix flux output (& diagnostics) to have same units as other  
34      advection scheme fluxes (was previously multiplied by deltaT).  
35    o added verification/seaice_obcs both to test seaice open boundaries
36      and to provide an example matlab scrpt for generating them
37    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
38    o pkg/salt_plume: clean up salt_plume_frac.F to
39      remove redundancy in PlumeMethod 1 and 4
40    o pkg/kpp: added saltplume diagnostics
41    o pkg/obcs and pkg/seaice:
42      - do not set uice and vice to zero when OB*icefile are unspecified
43      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
44      - moved seaice tracer obcs after call to seaice_growth
45    o pkg/salt_plume: added various options for salt plume depth
46      criterion and for vertical distribution of the salt
47    
48    checkpoint59l
49    o pkg/ptracers: new version of ptracers pickup:
50      read meta file and write only fields which are needed to restart.
51      ( same logic as main pickup file ; also using pickupStrictlyMatch )
52    o pkg/seaice:
53      - add timescale for melting due to warm mixed layer as a means of
54        setting SEAICE_availHeatFrac more conveniently
55      - add a CPP-flag/runtime parameter check for flooding algorithm
56      - reformulated availHeat in seaice_growth.F to be independent of AREA
57    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
58      unit changes
59    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
60    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
61      SX vector computer.
62    o pkg/seaice:
63      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
64        seaice forcing fields can now be read only through pkg/exf
65      - removed some unused halos
66    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
67    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
68      or U/VICE from U/VWIND before computing U/VSTRESS
69    
70    checkpoint59k
71    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
72      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
73    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
74      all experiments pass when compile with un-initialised var. checking option.
75    o added pkg/salt_plume
76    o script to test restart (for now, in MITgcm_contrib/jmc_script)
77    o pkg/seaice: new read/write pickup version.
78      read meta file and write only fields which are needed to restart.
79      ( same logic as main pickup file ; also using pickupStrictlyMatch )
80    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
81    o lab_sea.hb87: modify the domain & update output.hb87.txt :
82      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
83      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
84      process. Fixed here by closing the domain at the Northern boundary.
85    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
86    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
87      a set of consecutive levels in/from a 3-D array.
88    o pkg/ptracers:
89      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
90      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
91    
92    checkpoint59j
93    o in pkgs: dic, obcs, offline, rbcs:
94      standard way to compute coeff. for time interpolation between 2 time reccords
95      which retains full precision (& make results less dependent on compiler).
96      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
97    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
98      packages instead of reading ice cover and wind speed separately
99    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
100     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
101      to allow to compile customized code before the update)
102    o cleaning-up:
103      - fix CPP instruction syntax in pkg/obcs
104      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
105        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
106      - fix some threads issue in IO parts.
107    o pkg/dic:
108      - add tons of "_d 0" (--> much better testreports !)
109       and then update outputs of tutorial_global_oce_biogeo
110    o pkg/mom_fluxform:
111      add a special version of momentum advection intended to conserve momentum
112      next to a bathymetry step or a coastline edge. (default = off = #undef)
113    o new read/write pickup version:
114      - for now, only implemented for main (mdsio) pickup file.
115      - write out only what is needed to restart; merge pickup_nh , pickup_ph
116        and main pickup together.
117      - read meta file; read only what is needed to restart; stop if a field
118        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
119        if it make sense (even if the restart is not perfect).
120      - if no meta file, assume that pickup to read corresponds exactly to
121        a pickup that would currently be written.
122      - read pickup written in the old format (until checkpoint59i) if it
123        recognizes an old meta file (no field-list).
124      - add a meta file in exp. which starts from a pickup: 2 cases:
125        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
126         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
127        b) a meta file describing the content of the associated pickup file
128         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
129    o pkg/mdsio & pkg/rw:
130      - new routine to read a meta file ; new set of routine to read
131        Multiple-fields file (with meta file).
132    o added open boundary conditions capability for seaice
133        HSNOW, HSALT, UICE, and VICE
134    
135    checkpoint59i
136    o adjoint:
137      * fix multiDimAdvection adjoint
138        (partial recomputation problem by TAF for fVerT(:,:,kDown)
139        and comlev1 size definition (maxpass vs. max. number of tracers)
140      * verification/global_ocean.90x45x15 adjoint now tests
141        NLFS and multiDimAdvection using DST3 (=30)
142      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
143    o pkg/kpp: add "_d 0" to real constant (if missing);
144      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
145      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
146    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
147      for internal parameters related to restart process (formerly from PARAMS.h)
148      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
149    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
150      as argument. (only atm2d & obcs write_pickup have not yet been updated)
151    o pkg/monitor:
152      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
153      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
154      - account for deep Atmosphere factor and density factor (anelastic)
155    o added open boundary conditions capability for seaice HEFF and AREA
156    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
157      thermodynamics
158      - requires a little reorganization, which affects the testreport results
159        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
160        so that now the conservative form is tested
161      - add a few comments
162    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
163    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
164    o add new diagnostics to seaice: advective, diffusive fluxes (only for
165      multidim-advection, for scheme 2 they are not filled) and transports,
166      thermodynamic growth rates
167    o change units of EmPmR (inside the code, + within coupling interface)
168      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
169      Affects results @ truncation level (cg2d match) and update output of
170       experiments: lab_sea(6), global_ocean.90x40x15(10),
171      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
172      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
173      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
174      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
175    
176    checkpoint59h
177    o pkg/exf:
178      - improve vectorization by moving if-statement out of loops in
179        exf_mapfields, exf_radiation
180      - exf_bulkformulae.F: introduce 2D fields and vectorize code
181    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
182    o testreport:
183      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
184        monitor & update offline_exf_seaice exp. output.
185      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
186    o pkg/seaice:
187      - bug fix in the evp solver: boundary conditions were affected be
188        masking of zMax/zMin (changes results)
189      - minor bug fix in boundary conditions in seaice_calc_strainrates
190        (changes results for no_slip)
191      - seaice_lsr.F: make interpolation of eta dependent on boundaries
192      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
193      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
194        stress formulation and no-slip boundary conditions
195    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
196      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
197    o pkg/seaice: a first HSALT time stepping equation has been checked in
198    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
199      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
200      without requiring DO-IF statements
201    o pkg/thsice:
202      use continuous power-law function for partition of energy between lateral
203      melting/freezing and thinning/thickening ; old code using step function
204      still available with #undef THSICE_FRACEN_POWERLAW
205      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
206    o testreport: change AD testing : check against results/output_adm.txt
207      using same scripts as for forward test.
208    
209    checkpoint59g
210    o adjoint testing: in preparation for changing testreport:
211      - output format: cost and grad written on separated lines
212      - ad output results in directory "results" (instead of "results_ad")
213    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
214    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
215    o pkg/ecco: allow user defined cost function contributions
216    o testreport:
217      Allow to choose (per experiment) the list of tested output variables
218       and the main variable (used to issue a pass/FAIL ) ;
219      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
220      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
221      Also modify printing of summary:
222       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
223       b) echo the list of tested variables in the individual summary.txt of
224          each experiment.
225    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
226      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
227      (but still depend on the tile decompostion of the domain).
228    o pkg/seaice: change a discretization detail to make the B-grid code
229      "more symmetric". This change is likely to remove all "ridges/leads" that
230      where quasi-aligned with the grid in B-grid solutions. It may also be
231      the solution to the stress coupling issues with the B-grid.
232    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
233      remove .cvsignore from input dir. (since testreport no longer run here).
234    o pkg/thsice:
235     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
236     - fix reshaping of sea-ice just after advection:
237       melt all the ice only if ice-volume is too small.
238     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
239       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
240     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
241    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
242      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
243    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
244      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
245      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
246      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
247      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
248      -> update output.txt
249    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
250     this affects truncation error: -> update output.txt of exp:
251      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
252      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
253    
254    checkpoint59f
255    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
256    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
257      a bounded range (in forward mode)
258    o pkg/ecco, ctrl, autodiff and mom_common:
259     internal parameter controls, completements of implementations
260    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
261    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
262      (not seem any difference in testing results).
263    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
264       at face corners.
265    o pkg/generic_advdiff:
266     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
267      loop range indices for computing vertical advection tendency
268      and do the calculation in the interior only (no overlap) ;
269      for now, only implemented for SOM advection (to save CPU time).
270     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
271    o exch2 adjoint
272      First set of changes:
273      - add exch2 hand-written adjoint templates
274      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
275        This will require cleanup in pkg/autodiff/*.F
276        (changed routines currently kept separate in verif. code/)
277      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
278        that used to hide exch2 or cubed-sphere specific code
279        (commented via 'cph-exch2')
280    o pkg/seaice
281      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
282    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
283       output of global_ocean.cs32x15.thsice .
284    
285    checkpoint59e
286    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
287      for B-grid vector (not yet tested) and C-grid vector (<- only used
288      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
289    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
290      (#ifdef ALLOW_SALT_PLUME)
291    o gather_2d/scatter_2d: removed halo regions
292    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
293      scheme and the corresponding test case (under front_relax dir). For now,
294      only available with Skew-flux form and not yet tested in realistic set-up.
295      adjoint: store directives updated, but gradient checks deteriorated,
296      so maybe GM/Redi adjoint is now broken.
297    o seaice adjoint
298      * add AREA, HEFF, HSNOW as control variable
299        (should not change lab_sea results)
300      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
301    o pkg/seaice:
302      * added computation of saltFlux in seaice_growth;
303        For time being, sea ice salinity is assumed constant
304        contribution of snow flooding to freshening of sea ice is neglected.
305        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
306        defaults to 0.0 in order to maintain backward compatibility.
307        Typical values for SEAICE_salinity are 4 to 10 g/kg.
308      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
309      * added SEAICE_availHeatFrac, which specifies fraction of surface level
310        heat content used to melt or grow ice
311      * commented out cap of HICE: it helps keep ice thinner
312      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
313      * applied OBCS T/S mask to HEFFM sea ice mask
314    
315    checkpoint59d
316    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
317     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
318     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
319    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
320     and change default value of parameter "GM_Small_Number";
321     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
322       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
323       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
324    o pkg/ecco: cost function when applying pkg/smooth to controls
325    o pkg/ctrl: add forcingPrecond run time parameter
326    o pkg/seaice:
327     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
328     - fix bug in metric terms of u-equation in LSR solver (implicit part),
329       changes verification/lab_sea
330     - rearrange implicit part of u-equation in LSR solver to make it easier to
331       read, understand, and debug. This causes changes at the truncation level.
332     - fix (serious) bug in the boundary conditions (sign error in the implicit
333       part) of the LSR solver. Changes all LSR results.
334     - fixed problem with HSNOW initialization to avoid thick snow when AREA
335       is initilized with small values - does not change lab_sea results.
336     - added HsnowFile initialization capability
337    o pkg/smooth: addition to model/src and pkg/ctrl so allow
338     initialization of pkg/smooth and application to control vector
339    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
340    o dependencies: pkg/profiles requires pkg/cal
341    o pkg/profiles:
342     - added option ALLOW_PROFILES_GENERICGRID
343         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
344         that interpolation information (grid points and coefficients) is provided
345         within the netcdf input files.
346         -> sample matlab scripts can be found in MITgcm_contrib/gael
347         that allow you to prepare netcdf input files.
348     - also modified: cleaner include statements, cleaner error print statements,
349       cleaner stops when error, and more tests of the netcdf input files consistency.
350    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
351    o pkg/seaice:
352     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
353       requires a new routine: seaice_diagnostics_fill.F
354     - make sure that seaice does not move if not forced (pressure replacement
355       method, Hibler and Ip, 1995), changes results
356     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
357     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
358       It is turned off by default (=-1.), because it changes the results.
359     - make it possible to read AREA from a file, too.
360    
361    checkpoint59c
362    o add S/R and diagnostics for oceanic mixed-layer depth
363    o move GMRedi call after all vertical mixing schemes (including KPP)
364    o pkg/thsice:
365     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
366      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
367    o pkg/obcs:
368     - bug fix for balance code
369    o pkg/seaice:
370      - allow values of SEAICE_elasticParm > 1
371      - add new parameter SEAICE_evpTauRelax as an alternative
372        to SEAICE_elasticParm
373      - make lsr boundary conditions free slip (by default), changes result
374      - add code for no slip boundary conditions for lsr
375      - set minimum of zeta to zero (and not 4e8) (changes results)
376      - add a cap on AREA after advecting AREA if seaice_growth is not called
377    o change calculation of Visbeck K:
378      - no longer depend on tapering scheme; instead, compute slope (limited
379        by GM_maxSlope). this is equivalent to what was comuted before with
380        clipping or linear tappering.
381      - fix vertical averaging (wrong by 1/2 level)
382      - leave the old version (but will not be maintained) within
383        #ifdef OLD_VISBECK_CALC / #endif
384      - update output of exp. ideal_2D_oce
385    o change error catch in calc_r_star to improve vectorization
386    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
387      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
388    o adjoint:
389      Re-organized adjoint checkpointing according to Matt Mazloff
390      (but with modifs/completions/cleanups)
391      Storing is now bundled into large arrays to optimized I/O
392      (and second step in cleanup of the_main_loop)
393    
394    checkpoint59b
395    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
396      - export/import (between ocean & coupler) fields needed for ocean DIC.
397    o pkg/seaice:
398      - get rid of three more exchanges seaice_calc_viscosities (required
399        different loop boundaries in seaice_lsr and seaice_ocean_stress)
400      - bug fix in seaice_ocean_stress (update of lab_sea required)
401      - reduce loop boundaries to necessary minimum also in seaice_evp
402      - go back to the old way of computing deltaC/Z as the adjoint likes that
403        better
404    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
405      passive tracer to an Age Tracer) + update output.txt
406    o pkg/exf:
407      - implement A-grid / C-grid selection for wind-stress input files.
408      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
409      for now, in exf_bulk_largeyeager04.F only :
410      - change implementation for case where windspeed + 2. components wind-stress
411        are read-in. AND use rhoConstFresh to convert evap.
412    o pkg/seaice:
413      - use correct EXCH_UV for wind-forcing (on A-grid).
414      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
415        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
416    o pkg/exf:
417      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
418      EXF_INTERPOLATION:
419      - merge global_with_exf/code version of exf_interp_read.F
420        to the main code ;
421      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
422        reading the file ; Important: This options needs to be defined to recover
423        previous code.
424        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
425      - no longer loose real*8 precision along the way when using exf_iprec=64.
426    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
427      - change discretisation of evp-solver in order to avoid another exchange
428        (changes lab_sea) and clean up a little
429      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
430        help the adjoint (this also changes the results slightly)
431      - add a few "_d 0" where they had been missing in seaice_evp.F
432      - cleaning up: remove unused seaice_calc_rhs.F
433    o pkg/exf: some cleaning-up:
434      - change various "constants" into runtime parameters
435      - cleaned-up Large&Yeager04 routine which should eventually
436        replace exf_bulkformulae.F (changed names of S/R and CPP)
437        and merged various ALLOW_ATM_WIND options
438     only used with thsice pkg (in thsice_get_exf.F):
439      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
440        which are used when useStabilityFct_overIce=TRUE (= the default)
441      - change default values of ice & snow emissivity and scale downward LW
442        by ice & snow emissivity.
443    o pkg/thsice:
444     fix few little problems, in thsice_calc_thickn.F:
445      - growth vertically (and not laterally) if iceFrac == iceMaskMax
446      - melt only laterally if hIce < hThinIce (as the comments say)
447      and in thsice_extend.F:
448      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
449      - start to form ice as soon as the minimum ice-volume is reachable.
450     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
451      and cpl_aim+ocn
452    o pkg/kpp
453     - move computation of surface related input fields to KPP into a new
454       subroutine kpp_forcing_surf.F
455     - remove wrong (within bi,bj loops) EXCH calls.
456     - little cleaning (add argument myThid in last position, cvs header ...)
457     - for now, fix conservation problem by exchanging KPPviscAz (may not
458       be the best fix)
459    o pkg/seaice
460     - check for inconsistent evp parameter/cpp-flag combination
461     - remove leftover errIO flat for obsolete name list error handling
462    o OpenAD
463     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
464    
465    checkpoint59a
466    o pkg/seaice: some parameter clarifications and a little bit of clean up
467    o pkg/thsice: rename run-time parameters:
468       himin       -> hIceMin
469       himin0      -> hThinIce
470       hihig       -> hThickIce
471       i0          -> i0swFrac
472       transCoef   -> bMeltCoef
473       frac_energy -> fracMelting
474      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
475       with default values (for now) that do not change the results.
476      remove old version of thsice vars advection in pkg/seaice.
477    o in FFIELDS.h:
478      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
479      - make pLoad & sIceLoad always available (but still only used if
480         ATMOSPHERIC_LOADING is #define).
481    o pkg/kpp: replaced _KPP_RL with _RL
482    o bug fixes for vertical diffusivity computations when both KPP and
483        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
484        are no longer updating the vertical diffusivity array
485        (passed as argument) but are (re-) setting those arrays.
486    o pkg/seaice: fix bug in evp solver, while doing that
487      - change (improve?) discretization of stress computations for both
488        cgrid-lsr and evp solver
489      - add a new routine to compute strain rates
490      - the above changes lab_sea results
491      - add no slip conditions for evp solver (off by default), lsr-version
492        may follow
493      - fix exchange for shear at Z-points (does not change lab_sea)
494      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
495        (to force the user to pick a time step since there is not "safe" way
496        of choosing it)
497      - add principal stress diagnostics
498      - rearrange fields for evp a little to avoid having to call a: too many
499        exchanges and b: exchanges for stress trensor components which we do
500        not have.
501      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
502        of evp, complete rewrite for lsr case (latter is does not yet work
503        in all cases)
504    o pkg/kpp: add code to have mixing in shelf ice caverns
505      - add myThid to all kpp routines (long overdue)
506    
507    checkpoint59
508    o pkg/exf:
509      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
510        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
511      - move exf header files from lower_case.h to UPPER_CASE.h ;
512        add missing cvs Header & Name
513      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
514      - add namelist param. selectStressGridPosition, exf_monFreq
515      - retire many _CLIM routines, and remove data.exf_clim
516        + params moved to data.exf
517        + climsst, climsss now handled by exf_set_gen, i.e.
518          climss?period=0 refers to constant field,
519          climss?period=-12 to monthly forcing
520      - split up namelists in data.exf
521    o pkg/seaice:
522      - remove seaice_exch and seaice_exch_uv
523      - remove superfluous exchange of theta
524      - add myThid to seaice_budget_ocean/ice
525      - add new interface for atmospheric wind forcing (C-grid only)
526        + new routine
527        + two new field (taux, tauy for stress over ice)
528        + removed one global field (DAIRN) for C-grid case only
529    o pkg/thsise
530      - 2nd set of modifs for thsice adjoint in conjunction with exf
531    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
532    
533    checkpoint58y_post
534    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
535      vertical diffusivity, similar to that in MOM4; turned on using
536      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
537      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
538    o Added capability for 3D specification of background vertical diffusion
539      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
540      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
541      "data" file that contains the 3D vertical diffusivity coefficients.
542    o ice dynamics (pkg/seaice) with thsice thermodynamics:
543      - add code within pkg thsice to advect & diffuse sea-ice fields
544      similar to (and will replace) what has been added in  seaice_advdiff.F,
545      but: - conserving Mass, Heat & Salt.
546           - better when using non-linear advection scheme (not yet fully tested)
547           - can also be used in atmospheric set-up (for now, only the diffusion).
548    
549    checkpoint58x_post
550    o IO option for global-file compact format:
551      - add options when generating topology (utils/exch2/matlab-topology-generator)
552      - add I/O capability (pkg/mdsio).
553      - adapt utils/matlab/rdmds.m to read this format.
554      for now long-line format not yet supported by pkg/mdsio (& exch2).
555    o shelfice: add a few diagnostics
556    
557    checkpoint58w_post
558    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
559      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
560      (and replace horiVertRatio in NH code).
561      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
562                         and tutorial_plume_on_slope (sensitive to truncation)
563    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
564      directly to drive seaice model (C-grid only)
565    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
566     - reintroduce computation of wind from stress,
567     - compute tau (in exf_bulkformulae.F) from windstress averaged to
568       mass points to avoid tau = 0
569     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
570    o rdmnc.m: make it work with "global" files created with gluemnc
571    o rdmnc.m : some improvements in dealing with singleton dimension
572      (tested on all testreport mnc output files).
573    o genmake2: disable pkg/profiles if netcdf test fails.
574    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
575    o move call to cal_readparms up to make calendar parameters/variable available
576      to all packages
577    
578    checkpoint58v_post
579    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
580      useDynP_inEos_Zc tested.
581    o pkg/exf: changes to properly interpolate/mask/scale initial fields
582    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
583      and portions thereof.  See read_cs.txt for description and examples.
584    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
585      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
586      following the great-circle arc between those 2 points.
587    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
588      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
589    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
590     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
591     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
592     - still needs work (not working with some options ; efficiency to improve)
593       and serious testing.
594     - use this scheme for temperature & salinity in 2 advection test exp.:
595       advect_xy & advect_xz, respectively.
596    
597    checkpoint58u_post
598    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
599    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
600    o testreport: add option "-skipdir" to skip some test.
601    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
602      momentum calculation.
603    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
604    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
605      remove checkpoint.F and the_correction_step.F (no longer used);
606      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
607    o add option (linFSConserveTr) to correct for tracer source/sink due to
608      Linear Free surface
609    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
610    o pkg/thsice: fix reading mnc-pickups
611    
612    checkpoint58t_post
613    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
614    o pkg/mdsio:
615     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
616       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
617       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
618     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
619     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
620       either MDS_READ_FIELD or MDS_WRITE_FIELD )
621     - new S/R (to replace MDSWRITEMETA), which allows to write more
622       informations (variable names, time ...) to meta files.
623     - modify rdmds.m to give back the meta file content.
624    o pkg/diagnostics: change vertical interpolation to be safer, and more
625       flexible (define p-levels to interpolate to in data.diagnostics);
626      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
627       diagnostic pointer.
628    o pkg/seaice: more cleaning up of seaice_growth, added many comments
629    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
630    o fix multi-category seaice:
631     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
632       SEAICE_MULTICATEGORY
633     - fix short wave heat flux
634    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
635       and allow to use EVP solver. Change forward lab_sea: test both EVP
636       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
637    o Initial check-in of lab_sea adjoint
638      (very similar to natl_box_adjoint/code_seaice)
639      * used C-grid and EVP solver
640      * used KPP, GM/Redi
641      * uses inAdExact=.TRUE.
642      * gradient checks fail for both ADM and TLM
643        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
644        f.d. gradients actually seem more problematic than ADM, TLM gradients;
645        issue is related to forward mismatch between g77 an ifort
646    o pkg/seaice: overhaul of thermodynamics
647     - growth.F and groatb.F are replaced by new routine seaice_growth.F
648     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
649     - move a few global fields out of SEAICE.h into seaice_growth.F and
650       make them 2D (FICE/QNETO/ ...)
651     - remove FO (it is the same as QNETO)
652     - introduce a few local fields to avoid modifying external fields such
653       as atemp, etc.
654    
655    checkpoint58s_post
656    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
657      changed exf_set_gen.F so that
658        genperiod=0 means input file is one time-constant field and
659        genperiod=-12 means input file contains 12 monthly means
660    o CG2D: use pre-computed solver main-diagonal (stored in common block);
661      this affects truncation error ; generate new output file for exp. which
662      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
663        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
664        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
665        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
666        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
667        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
668    o start implementation of deep-atmosphere and anelastic formulation
669    o verification: remove 2nd copy of input files and use script "prepare_run"
670      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
671    o mom_common/vecinv/fluxform: fix a few initialisation isssues
672    o profiles: fix for multithreaded case
673    
674    o diagnostics: rename few diags:
675      s/'PRESSURE'/'RCENTER '/g
676      s/'TICE    '/'oceFreez'/g
677      s/'TAUX    '/'oceTAUX '/g
678      s/'TAUY    '/'oceTAUY '/g
679      s/'SWFLUX  '/'oceQsw  '/g
680      s/DIFx/DFxE/g
681      s/DIFy/DFyE/g
682      and add few ocean-forcing diagnostics:
683      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
684    o modifications to pkg/seaice/growth.F and budget.F, which change results of
685      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
686      as actual snow thickness.  It now refers everywhere to effective snow
687      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
688    
689    checkpoint58r_post
690    o modifications to pkg/seaice/growth.F, which change results of
691      lab_sea experiment: fixes pertain to melting snow over open water, to
692      masking EVAP under sea ice, and to using the correct AREA variable for
693      computations of EVAP, PRECIP, HSNOW, and GHEFF
694    o add ability to read bathy, salt, and theta using MNC (off by def)
695    o add flooding algorithm and advection of HSNOW for pkg/seaice;
696      both are turned off by default and do no change any results
697    o seaice advection with pkg/thsice: a step toward the use of non-linear
698      advection scheme, but #ifdef or commented out for now (requires more EXCH).
699    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
700      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
701      in natl_box (affects results @ truncation level: update output.txt)
702    o multi-threading and IO:
703      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
704      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
705        (needed to work with SingleCpuIO): tested in all verif. exp.
706    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
707      affects the results (but none of the verification test uses this scheme).
708    o Adding some pkg/diagnostics capability to pkg/seaice
709      (will certainly be subject to changes)
710    o ctrl: adding new control variables:
711      lwflux, lwdown, evap, snowprecip, apressure, runoff
712    
713    checkpoint58q_post
714    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
715      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
716      high_res_cube configuration by 4% on Columbia.
717    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
718      add (in global_with_exf/code) a version of EXF_INTERP_READ without
719      dynamical allocation (seems to work in multi-threaded).
720    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
721      single CPU io) so that TAF does not have to see EESUPPORT.h
722    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
723    
724    checkpoint58p_post
725    o obcs: stop if obcs is used with useCDscheme = .true.
726    o shelfice:
727     - fix a sign error so that no slip at shelfice interface works
728     - remove stop for combination non-hydrostatic code and shelfice. That does
729       not mean, that the results are correct, but at least they are numerically
730       stable
731    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
732    o added adjoint exch routined for all exch*3d* routines
733      and updated flow directives
734    
735    checkpoint58o_post
736    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
737      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
738    o change controling S/R for writing pickup file (new S/R do_write_pickup)
739      and clean-up reading/writing of pickup files.
740    o fix local version of read/write pickup (NH part) in rotating_tank/code
741    o simplify EXCH interface:
742     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
743     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
744    o added the regrid package
745    o shelfice:
746     - add a simple boundary layer scheme to reduce noise
747     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
748    
749    checkpoint58n_post
750    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
751       local variable (not in common block).
752    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
753      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
754      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
755        to work with SingleCpuIO.
756    o add "_d 0" to real constant of pkg/cfc subroutines ;
757       update exp. cfc_exemple & tutorial_cfc_offline output files.
758    o multi-threading and IO:
759      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
760        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
761      - barrier before and after reading.
762      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
763      - avoid using MDS_WRITELOCAL for LAND pkg output.
764      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
765        common-block variables ; Allows multi-threading with master-thread IO.
766    o change default MAX_NO_THREADS from 32 to 4 ;
767      and stop cleanly when MAX_NO_THREADS is too small.
768    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
769    
770    checkpoint58m_post
771    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
772       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
773    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
774       keep global_ocean.90x40x15 (for AD testing) with former secondary test
775       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
776    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
777        add MITgcm_tutorials (= code + all the tutorials)
778    o ecco, option to compute cost for total ssh (mean+anom)
779    o consistent with addition of ptracer and ssh in pkg/profiles
780    o profiles: adding ptracer and ssh
781    o testreport: change multi-test output-file name
782      (from output.txt.{name} to output.{name}.txt)
783    o profiles: now ok for mutli-tiles case
784    o seaice: add 4 parameters for different advection schemes for area,
785      (effective) seaice thickness, enthalphy, and snow height. Their default
786      is the standard parameter SEAICEadvScheme
787    o calc_gw:
788     - add cosFacU in zonal viscous flux (harmonic.visc.).
789     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
790       of tutorial_plume_on_slope.
791    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
792    o calc_gw: true flux-form, account for horizontal grid spacing.
793      update rotating_tank results, but not plume_on_slope (affected at
794      truncation level, 11 digits).
795    
796    checkpoint58l_post
797    o calc_gw:
798     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
799     - remove side-drag for now (need to fix it); update plume_on_slope results.
800     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
801    o commit code to make SST/SSS weights spatially variable
802      (based on either variable in-situ or variable initial T/S weights)
803    o pkg/ecco:
804      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
805        now based on horizontally varying weights wthetaLev, wsaltLev
806      * cost_averagesflags now returns year indices in addition to day, month
807      * sflux balance is performed on annual basis
808        (sflxumm, sfluxmm2, bal_sfluxmm)
809      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
810        including separate counting and multipliers
811    o pkg/rbcs
812      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
813    
814    checkpoint58k_post
815    o testreport:
816     - always build in dir. "build" (if not there, mkdir build instead of building
817       & running in input)
818     - run in dir run (if it exists), in build otherwise.
819     - call prepare_run (if input/prepare_run exists)
820     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
821    o pkg/exf modifications to interpolation and rotation routines for more
822       reasonable treatment of North Pole singularity: for tracers North Pole
823       value is set to northernmost zonal-mean value, for zonal velocity it is
824       set to zero, and for meridional velocity it is set to northernmost value.
825    o pkg/exf/exf_check_range.F
826     - add tile index to diagnostics and move stop statement to the very
827       end of the routine.
828    o pkg/diagnostics: (diagnostics_main_init.F)
829      define title of isomorphic variables according to the current config.
830    o pkg/thsice with pkg/seaice dynamics:
831    - fix domain of computation (interior only, required for exf) and do exchanges
832    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
833    o towards a standard way of dealing with multi-threading in MONITOR
834      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
835    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
836       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
837    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
838    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
839    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
840       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
841    o tracer advection:
842     - clean-up and simplify calc_common_factors.F
843     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
844       advection subroutine (but still not used within DST advection S/R)
845    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
846    
847    checkpoint58j_post
848    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
849      from file (collects calls previously in FORWARD_STEP)
850    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
851    o adjoint store dir. adjusted accordingly
852    o genmake2
853      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
854    
855    checkpoint58i_post
856    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
857      on wind stress (SEAICEstressFactor defaults to 1.)
858    o Total number of Timers is finite (<=40): comment out 2 non-essential one
859      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
860    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
861      on CS-grid: no longer loosing mass.
862    o exf & curvilinear-grid: no longer modify longitude xC & xG.
863    o pkg/ggl90: fix sloppy output and fix a bug
864    o pkg/seaice: added SEAICEuseEVPpickup parameter
865      - Set to false in order to start EVP solver with
866        non-EVP pickup files when using SEAICEuseEVP
867      - fix sign error in diffusion in seaice_calc_rhs
868    
869    checkpoint58h_post
870    * Modifications for bottom topography control
871      o replace hFacC by _hFacC at various places
872      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
873      o add non-self-adjoint cg2d_nsa
874      o update autodiff support routines
875      o re-initialise hfac after ctrl_depth_ini
876      o works for 5x5 box, doesnt work for global_ocean.90x40x15
877    * Adding verification for 5x5 box (4-layer) bottom topography control
878    
879    checkpoint58g_post
880    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
881       used for mean seasonal cycle, mean diurnal cycle); add an example
882       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
883    o pkg/ggl90:
884      - add parameter (minimum surface kinetic energy)
885      - fix bug (avoiding division by zero)
886    o couple pkg/thsice to pkg/seaice:
887      - modify advection in seaice to accomodate new scalar fields to be advected
888      - only muliDimAdection scheme work with seaice/thsice
889      - mapping of thsice-variables to seaice-variables, back and forth
890      - does not break the verification experiments, but does not give the
891        desired results either
892    o pkg/seaice
893      - make (default) second order advection a bit less confusing?
894    
895    checkpoint58f_post
896    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
897      to pkg/seaice):
898      - new routines thsice_map_exf and thsice_get_exf provide the interface
899      - add an additional formal parameter to thsice_solve4temp
900    o pkg/exf:
901      - add new fields wspeed, snowprecip (to be able to couple to thsice)
902      - correct Stefan-Boltzmann constant
903      - new parameter for longwave surface emittance
904      - separate some stuff from exf_bulkformulae into new routines  
905        exf_radiation, exf_wind
906      - add new parameters and constants: longwave emissivity for ocean, ice
907        and snow, evaporation parameters over ice
908      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
909        either wind from stress or stress from wind
910    o pkg/thSIce:
911    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
912    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
913       and THSICE_CALC_THICKN
914    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
915    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
916      to make debugging easier.
917    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
918    o pkg/bulk_force:
919      - clean-up comments and parameters ;
920      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
921    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
922      generate new output for test-experiment: aim.5l_cs.thSI
923    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
924      testreport accordingly
925    
926    checkpoint58e_post
927    o SEAICE_CGRID adjoint done
928    o R_STAR adjoint implemented.
929      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
930      * need to sort out init. of h0facc, etc.
931    o Make pkg/profile fully independent of ecco,cost, etc. stuff
932      to be able to use it in pure forward.
933    
934    checkpoint58d_post
935    o upgrade simple test-experiment to tutorial example:
936     step.1: duplicate the experiment and (step.2) will remove the old copy.
937      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
938      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
939      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
940      tutorial_global_oce_biogeo    <- copy of dic_example
941      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
942      tutorial_plume_on_slope       <- copy of plume_on_slope
943      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
944      tutorial_global_oce_optim     <- empty for now (David ?)
945      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
946     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
947    o correct a sign problem in cost_scat.F
948    o obcs and ptracers: fix boundary conditions for advections schemes
949      with larger stencil
950    o thsice adjoint: start
951    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
952      completeness
953    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
954      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
955    o ptracers adjoint:
956      * avoid extensive recomputatations
957      * fix missing re-init. of gptr (missed by TAF)
958    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
959      me to turn off the excessive output to STDOUT that this package produces
960    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
961      and add those terms in Vector-Invariant formulation.
962    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
963      if the control period (xx_hfluxperiod etc) is 0
964    o in profiles pkg, clean routines and fix details
965    o in ecco pkg, reading ssh data:
966      fix problem in case the model does not start at iter0=0
967    o fix mnc-pickup/restart for ptracers
968    o new package prifiles:
969      code to compute profile-based cost by Gael Forget
970      (modifs in ecco, ctrl, autodiff)
971    o Benign bug fix in initialization (spotted by M. Mazloff) of
972      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
973    
974    checkpoint58c_post
975    o adjoint: finish NLFS adjoint and provide reference output in
976      verification/global_ocean.90x40x15/results_ad_nlfs
977    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
978      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
979      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
980      with SEAICE_CGRID defined.
981    o move calendarDumps from "data" to "data.cal" and clean-up the code
982      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
983    o add useEXF & useCAL flags (for now, set in hard-coded way)
984    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
985      (were missing in NH mode, and wrong in quasihydrostatic mode).
986      waiting for Chris updated version of calc_gw to add those CALLs.
987    o fix bug in quasihydrostatic S/R ;
988      add a test for this option: global_ocean.90x40x15.qshyd
989    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
990      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
991    o add on/off flag useOffLine for package OFFLINE
992    o seaice:
993      - modify advection so that it works also on the C-grid
994      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
995        problem in multi-tile runs with C-grid
996      - add flags for clipping ice velocities and/or masking solver forcing
997      - fix drag (ocean on ice) formulation and a bug that caused noise in the
998        C-grid solver
999      - added a few comments to seaice_diffusion.F
1000      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1001        are now exclusive)
1002      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1003        required re-ordering the code a little:
1004       + make DAIRN global variable (defined in SEAICE)
1005       + move computation of the viscosities eta and zeta into a new separate
1006         routine (because I need to recompute them in seaice_ocean_stress.F)
1007    
1008    checkpoint58b_post
1009    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1010      update output.txt of exp. aim.5l_cs.thSI
1011    o various mnc cleanups and improvements:
1012      + shrink lookup tables by factor of ~4
1013      + better error reporting when running out of lookup space
1014      + able to handle longer path/file names (up to 500 chars)
1015    o adjoint:
1016      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1017      - TBD: "hidden" mom_vecinv recomp. in dynamics
1018    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1019     (allow to differentiate between forcing components using new integer flags:
1020      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1021     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1022    o ecco
1023      - enable trend removal from SSH anomaly obs.
1024    o adjoint
1025      - a fix for PmEpR when #undef EXACT_CONSERV
1026      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1027      - try to fix "hidden" recomp. in forward_step for NLFS
1028        (NLFS seems broken sometimes after I checked it in)
1029    o seaice:
1030     - add c-grid version of the dynamic solver:
1031       + three new routines that are the c-grid substitute lsr, dynsolver
1032         and ostres
1033       + put a few fields that were local to dynsolver into global common
1034         blocks, so that I can move the computation of stresses etc into
1035         seaice_lsr (saves coding but may break the adjoint).
1036     - replace more hardwired parameters by runtime parameters
1037     - add ice masks that mask the rhs of the implicit solvers where there
1038       is no ice (commented out in seaice_dynsolver, because i am not sure
1039       if this works properly), eventually this should replace the clipping
1040       of ice velocities in seaice_dynsolver to +/-40cm/s.
1041    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1042      include it only where its needed
1043    o move balancing of fluxes before the call of external_forcing_surf
1044    o seaice:
1045      - correct units of turning angles (now they are really in degrees)
1046      - move computation of GWATX/Y out of main routine into dynsolver
1047      - initialize GWATX/Y in seaice_init
1048    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1049      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1050    o seaice: add runtime flags for turning angles (default to zero)
1051    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1052      and trend from exf forcing and ctrl control adjustments
1053    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1054      (since checkpoint57x_post)
1055    o change the default rotation period to 86164.s = the Earth rotation
1056    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1057      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1058    o seaice advection: add code for choosing between the default (2nd order
1059      central differences) and multiDim advection schemes provided by
1060      pkg/generic_advdiff
1061    o seaice:
1062      - removed all references to SEAICE_GRID.h fields from
1063        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1064        (cubed-sphere configuration will change a little)
1065      - grid computations in seaice_init are obsolete now.
1066      - cleaned up code a little so that is easier to read (hopefully).
1067      - added new (better?) discretizations of default advection and diffusion
1068        (turn on with SEAICEuseFluxForm)
1069      - replace 1 in 3d global fields by kSurface in growth.F
1070      
1071    checkpoint58a_post
1072    o seaice:
1073      - bug fix in advect.F
1074    o shelfice:
1075      - separate shelfice load anomaly from pload (breaks with time
1076        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1077        Its default is 0., but it may be computed more cleverly from (unknown)
1078        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1079        done offline. A good approximation of the pressure load anomaly is
1080        necessary to avoid large initial adjustment processes underneath
1081        deep-reaching shelfice.
1082      - small fix in ISOMIP shelfice_thermodynamics
1083      - add more sophisticated thermodynamics of Hellmer (1989), this is
1084        now the default
1085      - give a few constants more intuitive names
1086    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1087      if bulk formulae are used in long integration (especially EmPmR). Turn
1088      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1089      if balancePrintMean, the imbalance that is substracted is printed to
1090      STDOUT.
1091    o fix bug (typo) in obcs_apply_eta.F
1092    o add a new package shelfice which enables us to model the circulation
1093      underneath shelf-ice with draughts of hundreds of meters.
1094     - works
1095     - to do: + include improved thermodynamics
1096              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1097                instead of new field kTopC
1098              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1099                instead of new field R_shelfIce and new code in ini_depth.F
1100                and ini_mask_etc.F?
1101              + adjust vertical mixing schemes?
1102    o seaice pkg:
1103     - add a cpp-flag to include a simple formula for a salinity dependent
1104       freezing point of sea water at the surface
1105     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1106       meridional stresses are now different (and hopefully correct)
1107    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1108       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1109       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1110    o pkg/diagnostics: add options and parameters for regional-statistics
1111       diagnostics ; define regions by reading a region-mask from a file
1112       (might add other options later)
1113    o pkg/bulk_force:
1114     - add option and parameters to use AIM surface-flux formulae.
1115     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1116       others forcing fields (defined in PARM05, parameter file "data") are loaded
1117       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1118     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1119     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1120     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1121       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1122     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1123    
1124    checkpoint58
1125    o add "--embed-source" option to genmake2 which, when the supporting
1126      tools can be compiled (as determined by genmake2) will turn on the
1127      embed_files package which then embeds the entire MITgcm source code
1128      (*.[fFhc] + Makefile) used for the build within the executable
1129      - requested by CNH but off by default
1130      - adds a paltry <9MB to the mitgcmuv executable in most cases
1131      - only writes the output when useEMBEDSRC in eedata is true
1132    o clean up 3-dim. relaxation codes:
1133      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1134      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1135      * Thanks to Tom Haine for testing!
1136    
1137    checkpoint57z_post
1138    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1139      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1140    o fix the pickup behavior for obcs in combination with ptracers
1141    o fix a bug in ptracers_external_fields_load
1142    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1143      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1144    o transfered surface NH pressure to eta field (if exactConserv).
1145    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1146         and update lab_sea output.txt file.
1147    o completing 3-dim. relaxation code: additional term
1148         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1149      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1150      * At compile time, in "EXF_OPTIONS.h" set
1151          #define  ALLOW_CLIMTEMP_RELAXATION
1152          #define  ALLOW_CLIMSALT_RELAXATION
1153      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1154          tauThetaClimRelax3Dim = 15552000.0,
1155          tauSaltClimRelax3Dim  = 15552000.0,
1156      * 3 cases:
1157          1) Use a constant-in-time 3-dim. field
1158          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1159          3) Real-time relax. to time-evolving prescribed field
1160    o Adding Laplacian-type smoothness constraint on
1161      initial and boundary (forcing) controls (ic, bc)
1162      * enable at compile-time via
1163        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1164      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1165      * Absolute scale somewhat unclear so far
1166      * no area weighting was included since no other cost term does so far
1167    
1168    checkpoint57y_post
1169    First step for a NLFS adjoint
1170    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1171    o new init. routines for calc_r_star, calc_surf_dr
1172    o still need to deal with ini_masks_etc
1173    o testreport seemed happy
1174    checkpoint57y_pre
1175    
1176    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1177    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1178    o add new offset feature to offline pkg (plus minor cleanup)
1179    o cfc fixes for final year of integration
1180    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1181      be in GCHEM_OPTIONS).
1182    
1183    checkpoint57x_post
1184    o fix testreport Pb in multiple test experiment.
1185    o cleanup our namelist syntax in verification:
1186      - make it more F95 standards compliant (some work still needed)
1187      - allows the vast majority of our tests to work with gfortran
1188    o Non-Hydrostatic:
1189     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1190     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1191    o Allow to apply AB on T,S rather than on AB(gT,gS):
1192     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1193     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1194       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1195     - need a "clever" read_pickup to restart from the other AB formulation
1196    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1197    o remove some unused variables (reduces number of compiler warnings)
1198    o adjoint
1199      * Disable useVariableViscosity for adjoint for time being
1200        (there are a number of extensive recomputations)
1201      * Initialize certain variables needed for adjoint
1202    
1203    checkpoint57w_post
1204    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1205                 fix the singleCpuIO RS version of MDSWRITEFIELD
1206       and add a WARNING if using globalFiles=T with multi-processors.
1207    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1208      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1209    o tracer advection scheme:
1210      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1211       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1212       was not very convenient).
1213      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1214       (further tests needed for the implicit DST & Flux-Limiter schemes).
1215    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1216      and sRef for convenience, handy, when you want to initialize
1217      ptracers in a large domain with a constant non-zero value. Also,
1218      untangle ptracers_init.F a little.
1219    
1220    checkpoint57v_post
1221    o change dome exp. to use variable viscosity in side-drag terms.
1222    o remove all the files from the cfc_offline test since they are now
1223      incorporated into tutorial_cfc_offline which has been producing
1224      identical results for a few days of testing
1225    o add new parameter: sideDragFactor to enable half-slip-side BC
1226      and change side-drag S/R to use viscosity from mom_calc_visc
1227      (can switch back by setting sideDragFactor=0.); affects results at
1228      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1229       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1230    o vorticity & strain are now computed without masking, to account for
1231      no-slip-side BC in variable viscosity calculation ; mask is applied
1232      anyway later on, before computing advection/coriolis terms.
1233    o modify exp4 to test new obcs support for reading from external files
1234      and for passive tracers
1235    o fix behavior of ptracers_monitor when monitor output is written to a
1236      netcdf-file; still not independent of monitor.F (writes in the same
1237      file).
1238    o change default value of tRef (put a uniform, meaningful value for ocean
1239      & atmos) and initialize sRef (was missing, as Martin mentioned).
1240    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1241      to be proportional to enstrophy dissipation length.  Thus,
1242       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1243      This is now consistent with Smagorinsky and with the manual.
1244    
1245    checkpoint57u_post
1246    o OBCS and PTRACERS: add open boundary support for passive tracers
1247      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1248        OB-values from file; this is not different from the way theta and salinity
1249        are treated
1250      - however, Orlanski-radiation conditions are not supported, and the model
1251        will stop if you use pTracers and Orlanski at the same time.
1252      - beefed up the rountine obcs_external_fields_load: now only those open
1253        boundary values are overwritten with values from files for which there
1254        are really files, otherwise the OB-fields remain untouched. This makes
1255        it possible to use different OBs at different ends of the domain (as
1256        with EXF)
1257    o reduce number of exch calls in shap_filt (s2).
1258    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1259      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1260    
1261    checkpoint57t_post
1262    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1263    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1264      same truncation, independent of the face number: affects affects several
1265      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1266    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1267      note that biharmonic viscosity + no-slip was not tested in any experiment.
1268    o fix bug in non-linear free-surf side-drag ; generate new output for
1269      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1270    o make mnc honor the writeBinaryPrec flag for most kinds of output
1271    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1272    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1273      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1274    o add brackets in multi-terms sum to get same truncation, independent of
1275      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1276      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1277    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1278      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1279      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1280      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1281      Suggested values of viscosity parameters found in mom_calc_visc.
1282      Many new viscosity diagnostics available.
1283    
1284    checkpoint57s_post
1285    o Add clearing-house for viscosity calculations, mom_calc_visc and
1286      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1287      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1288      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1289      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1290      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1291      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1292      ViscAhStrain and viscAhTension are now retired.
1293    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1294    o In response to JMC's bug report, genmake2 now ignores any soft-links
1295      that it finds in the *current* directory when searching for files.
1296      Soft-links found in any other source directories will still work as
1297      they did before.
1298    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1299      a C routine to unlimit the stack size
1300    o mnc-ify pkg/aim snapshot vars
1301    o mnc-ify pkg/land as requested by Daniel
1302    o various changes to mnc including:
1303      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1304      - output can now be grouped so that all files within a group
1305          change the ITER portion of their names in lock-step together
1306      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1307          and works with both EXCH1 and EXCH2 (but needs more testing)
1308      - writing works for all verification test cases w/ g77 on Linux
1309    
1310    checkpoint57r_post
1311    o make MNC variable initialization happen earlier
1312    o add diagnostics for (almost) each term of the momentum Eq.
1313    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1314    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1315    o remove MINIMAL_TAVE_OUTPUT option ;
1316      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1317    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1318      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1319    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1320    o add time-dependent SST, SSS control
1321    o cost terms in ecco/ modularized (new cost_generic.F)
1322    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1323    o new infrastructure for seaice model vs. obs misfits in seaice/
1324      * driver from the_main_loop.F is seaice_cost_driver.F
1325      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1326      * gradient check in Exp. 6a of natl_box_adjoint/
1327    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1328      (see README file)
1329    
1330    checkpoint57q_post
1331    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1332    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1333      - bug was reported by Jean-Michel and Ian Fenty
1334    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1335      update exp. cpl_aim+ocn output.
1336    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1337      Needed for high-res. runs with large global files
1338      to be able to limit tapelev size
1339    o Changed some tests for adjoint:
1340      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1341      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1342      * global_ocean.90x40x15/ back to default 3-level checkpointing
1343    o Modifications to enable scripted COMMON to MODULE conversion
1344      * verification/OpenAD/code/ has necessary scripts and description;
1345      * converts, compiles and runs successfully;
1346    
1347    checkpoint57p_post
1348    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1349    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1350      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1351    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1352    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1353      (was already the case for dissipation with mom_vecinv,
1354       and also the case for grad.PhiHyd when staggered-timeStep)
1355      This will allow to put dissipation out-off the AB time-stepping.
1356     Unfortunately, affects truncation error. Update output of exp. that "fails"
1357      (cg2d matching number) and leave the others for later: front_relax(10),
1358      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1359      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1360    
1361    checkpoint57o_post
1362    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1363      (2) its ready to be documented during the 20050801 DocFest
1364    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1365      for ideal_2D_oce and lab_sea on linux_ia32_g77
1366    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1367      in global1x1_tot/code_seaice_adj to access indices 32, 33
1368      (worth another tag)
1369    
1370    checkpoint57n_post
1371    o adding precip control xx_precip 32
1372    o adding swflux control xx_swflux 33
1373    o Replacing 10 forcing penalty cost routines by 1 generic.
1374    o Implementing partitioning in time-mean and variable adjustment
1375      for atmos. state.
1376    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1377    o in natl_box_adjoint:
1378      * updated exp 1 to 10
1379        (but does not have time-mean vs. variable split results yet)
1380    o updated global1x1/*_seaice_adj/
1381      to incorporate latest changes
1382    o enable useSingleCpuIO for mdsio vector routines
1383      (applies in particular to tapelev I/O)
1384    o removed inefficient K-loop in all active_file*control*.F
1385    
1386    checkpoint57m_post
1387    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1388      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1389    o pkg/exch2: filling of face-corner halo regions is optional
1390      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1391    
1392    checkpoint57l_post
1393     tag before updating tutorials (pre-release-2)
1394    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1395       for output and interpolation of input fields onto model grid)
1396    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1397       Affects results of exp. rotating_tank ; update output.txt.
1398    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1399          and taking the square quantity and/or using a fraction-weight field.
1400    o fix aim_diagnostics_init.F mate numbers.
1401    o add mnc output capability to diagnostics/diagstat and update
1402      our cvsignore files for the ACSII output generated
1403    
1404    checkpoint57k_post
1405    o lab_sea now uses diagnostics package and provides a suite of
1406      new EXF diagnostics output.
1407    
1408    checkpoint57j_post
1409    o exf
1410      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1411        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1412        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1413      * extended diagnostics output
1414        - now includes all EXF variables
1415        - hs, hl moved to common block
1416        - separate S/R for diagnostics, called after ctrl vector is added
1417        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1418        - EXFqnet contains true Qnet (i.e. includes qsw)
1419      * updated verif. lab_sea, global_with_exf
1420      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1421        to ensure that diagnostics sees a true EXFqnet
1422    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1423    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1424      several times with different frequencies.
1425    o mnc-ify the thsice package as requested by Daniel Enderton
1426      - the monitor--MNC output needs work
1427      - many attributes need to be added (most are currently blank)
1428    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1429      - many attributes need to be added (most are currently blank)
1430    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1431    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1432    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1433      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1434         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1435    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1436     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1437    
1438    checkpoint57i_post
1439    o Diagnostics package was changed: diagnostic allocation is now deactivated
1440      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1441    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1442      add 1rst Order upwind vertical Shear.
1443    o add a quick fix for A/B checkpointing in OFFLINE mode
1444    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1445      end-run around the C/Fortran linking horror in eesup/src/timers.F
1446    o added pkg/runclock: allows user to terminate run based on wall clock
1447    o added non-hydrostatic scaling parameter: nh_am2
1448    o pkg/my82: futile attempt to make results compiler-independent by adding
1449      some "_d 0", etc. no effect.
1450    o for mnc output, fill the 'T' coordinate var with myTime and create a
1451      separate 'iter' variable for iteration count
1452    o pkg/diagnostics:
1453      add new capability: output of Global/Regional & per-level statistics ;
1454      tested against monitor output (including land & thSIce) on various exp.
1455    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1456    
1457    checkpoint57h_done
1458      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1459      data.diagnostics, data.gchem, data.ptracers) is done.
1460    
1461    o pkg/diagnostics: prepare for Global/Regional statistics.
1462      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1463    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1464      and rename it: DIFFERENT_MULTIPLE
1465    
1466    checkpoint57h_post
1467    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1468    o pkg/diagnostics: change output frequency, now in seconds (instead
1469      of Nb of iterations). This requires to change data.diagnostics.
1470    checkpoint57h_pre
1471    
1472    o in mnc, let the user create the output dir if both mnc_outdir_date
1473      and mnc_outdir_num are false
1474    o add fflags() to pkg/diagnostics which allows one to specify, on a
1475      per-file basis, the file precision [default behavior is unchanged]
1476    o added diagnostics to pkg/kpp, including computation of mixed layer
1477      depth based on a temperature/density criterion
1478    o updated verification/natl_box to test the new pkg/kpp diagnostics
1479    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1480    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1481    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1482      not mnc -- this mistake was found by JMC and is now corrected
1483    
1484    checkpoint57g_post
1485    o add Adams-Bashforth 3rd Order time stepping:
1486      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1487      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1488    checkpoint57g_pre
1489    
1490    o make lambda[Theta,Salt]ClimRelax spatially varying
1491      (default remains spatially uniform constant based on tau)
1492    o added new control variables
1493      * init. uVel, vVel, etanN
1494      * lambda[Theta,Salt]ClimRelax
1495    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1496      (suggested by G. Forget)
1497    
1498    checkpoint57f_post
1499    o add parameter "baseTime" = model base time = time at iteration zero
1500      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1501      account for baseTime shift
1502    o move Coriolis arrays from PARAMS.h to GRID.h
1503    checkpoint57f_pre
1504    
1505    o mnc-ifying the seaice package
1506    o introduced an alternative length scale calculation for use in the limiting
1507      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1508    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1509    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1510      as well as grad(vort3).  Made it compatible with both approximate form
1511      for the cubed sphere and full form of these gradients.  Added flag
1512      useFullLeith to select between approximate and full form.  
1513    o add "d0" in getcon.F to reduce differences between compilers/platforms
1514      update output.txt of exp. fizhi-gridalt-hs
1515    o change port_rand funtion to allow to set the seed.
1516    o fix obscure MNC bug involving conversion between reals and integers
1517      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1518        new version is now more standards-compliant
1519    o adjoint-related modifications
1520      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1521      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1522      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1523    
1524    checkpoint57e_post
1525    o Adding eddy stress controls a la Ferreira et al.
1526    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1527    
1528    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1529      update output.txt of exp. fizhi-gridalt-hs
1530    o add more "Z" dimensions and associated coordinate vars to MNC
1531    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1532    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1533      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1534      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1535      months and years.  Requires pkg/cal.
1536    o diagnostics: add pickup functionality
1537      - off by default for backwards compatibility
1538      - current version only uses MDSIO -- MNC will be added
1539    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1540    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1541    
1542    checkpoint57d_post
1543    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1544    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1545      output from the diagnostics package
1546    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1547    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1548      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1549    o add coordinate variables to the MNC output from the diagnostics package
1550    o change MNC-flags default value: true when useMNC=TRUE
1551    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1552      the ability (off by default) to read the grid information using MNC
1553    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1554    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1555    o do snap-shot diagnostics at the middle of the time-interval (instead of
1556      at the end).
1557    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1558      new test for AIM with thSIce + slab-ocean
1559    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1560    o move state variable diagnostics to the beginning of the time step ;
1561      (note: still needs some work specially for snap-shot diagnostics)
1562      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1563    
1564    checkpoint57c_post
1565    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1566    o generate new output.txt files on faulks with g77 & the new -ieee option
1567    checkpoint57c_pre
1568    
1569    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1570      update output.txt of exp. global_ocean.90x40x15
1571    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1572      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1573    o add saltFlux(+File) forcing capability with periodicExternalForcing
1574    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1575    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1576    o improvements for the MNC output from DIAGNOSTICS:
1577      - correct handling of the unlimitied dimension
1578      - all dims now have associated coordinate variables
1579      - variables located at U, V, and Corner ("Z") points are now written
1580        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1581        *all* data points are output
1582    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1583    o added pkg/seaice/seaice_monitor.F
1584    o mdsio_readfield.F can now read files visible only to master MPI process.
1585    o pkg/seaice: some test code for ice-modified ocean stress
1586    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1587      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1588      spurious negative numbers for precipitation and humidity.  Will cause
1589      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1590    o pkg/ctrl/
1591      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1592        May be enabled via doPackDiag
1593      *  introduce z-scaling of
1594         + gradient (doZscalePack) and
1595         + control (doZscaleUnpack)
1596    o pkg/mdsio/
1597      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1598      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1599    
1600    checkpoint57b_post
1601    o simplify options in diagnostics_fill arguments (remove weird combinations)
1602    o fix MNC coordinate variables so that they now contain per-face index
1603      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1604      general, EXCH2 grids are only aligned to a "local" coordinate system
1605    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1606    o Implement instantaneous output within pkg diagnostics:
1607      setting a negative frequency in data.diagnostics produces
1608     "snap-shot" output (as opposed to time-average if freq > 0)
1609    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1610      NOTE: change ptracer diagnostics name: use 2 characters to work with
1611            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1612    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1613      becomes the coordinate variable for the 'T' dimension
1614    o add CF-style coordinate variables to MNC
1615      - just a first cut:  numbers are meaningless on the cubesphere and
1616        missing along the T axis but otherwise it works!
1617    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1618    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1619    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1620      this is based directly on what the model compute, so that the content of
1621      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1622    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1623    o clean up build options files for SunOS, in particular
1624      - remove -traditional from xmakedepend
1625      - change -xarch=v9 to -xarch=native for f77
1626      - restore use of make (not gmake)
1627      - add CC=gcc if using g77
1628    o changes per discussion of AM, JMC, & EH3 today:
1629      - move redundant "grid" variables out of "state" -- in preparation of
1630        creating proper CF-style coordinate variables and in recognition
1631        that any/all grid variables can be easily copied (eg. w/NCO) from
1632        the grid files into any of the other NetCDF files
1633      - *always* output grid variables with MDSIO (this will eventually be
1634        changed)
1635      - output MNC grid file if useMNC is true
1636    o every instance of _END_MASTER() has been found and replaced with
1637      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1638      preprocessors
1639    o re-arrange diagnostics pkg initialisation:
1640     - allow each package to extend the available diagnostics list
1641     - add some checking and fix small problems (multi-threaded, ...)
1642     - new S/R diagnostics_fill (replace fill_diagnostics):
1643       look through the short list of active diag. (instead of the long list)
1644       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1645    
1646    checkpoint57a_post
1647    o this set of changes restores TAMC compatibility
1648      tested for global_ocean.90x40x15 adjoint on trough
1649      (what a pain)
1650    
1651    checkpoint57a_pre
1652    o some modifs in tools/build_options for sunos
1653    o call ctrl_pack for ctrl at end for optimcycle=0
1654    
1655    checkpoint57
1656    o add horizontal bi-harmonic viscosity for vertical velocity
1657      - new parameter viscA4W (defaults to viscA4)
1658      - affects only non-hydrostatic code
1659      - to be done: no-slip lateral boundary conditions
1660    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1661    o implement Implicit Vertical advection for pTracers
1662    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1663      (implemented also for implicit vertical diffusion & advection)
1664    o OBCS: extend application of tracer open boundary conditions
1665      to a strip beyond the boundary of width Olx/Oly
1666    o add call monitor to TAF set of required calls (flow directives)
1667      and include in natl_box_adjoint
1668    o untangle a few ifdefs related to cost, ctrl, autodiff
1669      untangel a few ALLOW_ECCO_OPTIMIZATION
1670    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1671      (theta2, salt2 in ecco_cost_weights)
1672    
1673    checkpoint56c_post
1674    o OBCS as control variables
1675      - update ctrl_ad_diff.list, obcs_ad_diff.list
1676      - remove balance of obcs controls from default
1677      - fix index bug nobcs in ctrl_init
1678      - fix dummy fields filen in ctrl_pack
1679      - add dummy weights for obcs
1680    o lsopt: comment out fort.94 output
1681    o optim:
1682      - remove unnecessary header files
1683      - adjusted namelists
1684      - add xerbla.F to Makefile
1685    o exf:
1686      - multiple modifications of exf_check_range
1687      - unit change in exf_init_runoff from [m/year] to [m/s]
1688    o mdsio:
1689      - i/o-vector change debugLevel from debLevA to debLevB
1690    
1691    checkpoint56b_post
1692    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1693      is called from DO_THE_MODEL_IO
1694      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1695      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1696      - clean up PTRACERS_WRITE_TIMEAVE a little
1697    o add another verification experiment that tests both the cfc-pkg and
1698      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1699      reactive tendencies treated inline with regular timestepping
1700    o testreport previously did a lousy job of comparing small numbers, so
1701      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1702      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1703      testreport.
1704    o ptracers_monitor: bug fix for MPI
1705    
1706    checkpoint56a_post
1707    o GCHEM: finish reorganizating the package
1708      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1709        (introduces another 3D-array for each passive tracer, but only if
1710        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1711        gchemTendency is not needed because the timestep is done separately)
1712      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1713      - GCHEM is now---more or less cleanly---separate from PTRACERS
1714      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1715        so clear to me how that should be done in a general way.
1716    o CFC: improve formatting of output in CFC_ATMOS
1717    o PTRACERS:
1718      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1719        that ALL experiments with ptracers enable can be checked. This makes
1720        GCHEM_MONITOR obsolete.
1721      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1722        monitorFreq
1723      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1724    o add PTRACERS (PTR0[1-5]) to testreport output
1725    o exf_check_range:
1726      * default changed to .TRUE.
1727      * will check values for niter0 if debLevA, every timestep if debLevB
1728      * STOP in exf_check_range if 'out of range'
1729      * range chosen generous to allow for potential extema
1730      TBD: a version with stricter range
1731           permitted range would be runtime parameters
1732    o GMredi:
1733      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1734      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1735      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1736    o GCHEM:
1737      - move call to GCHEM_FORCING_SEP, so that it is now called before
1738        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1739      - introduced a useGCHEM runtime flag and applied it everywhere.
1740      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1741        this flag is now only visible within GCHEM-pkg routines.
1742      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1743        be replaced by a 3D array that is computed before thermodynamics; for
1744        this, the tracer ID iTracer had to be included into the parameter list
1745        of ptracers_forcing
1746      - set up forward_step to call gchem_forcing, that will replace
1747        gchem_forcing_int in ptracers_forcing
1748      - cleaning up
1749    o small cleaning of exch2: remove files that are also in eesupp/src
1750    
1751    checkpoint56
1752    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1753    o mnc: cleanup "full" files--fixes out-of-memory problem
1754    o ECCO-GODAE
1755      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1756      * fully merged and updated from SIO code
1757        windstress sign change affects
1758        - exf_inscal_[u/v]stress
1759        - sign of xx_tau[u/v] adjustments
1760        - signs in cost_scat
1761      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1762      * natl_box_adjoint updated and compressed
1763      * 2-level checkpoint switch added
1764        (tested in EXP. 1 of natl_box_adjoint)
1765      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1766    o SVD
1767      * first complete, non-hacked version for SVD calculations
1768      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1769        performed via direct access files admtlm_vector.it????
1770        (via ctrl_[un]pack)
1771      * optimcycle is used for ARPACK iteration counter
1772        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1773      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1774        and add linear transforms where necessary
1775      * controls are initial/final SST, SSS (can be extended; need to check
1776        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1777    o mdsio: filename info to both stderr, stdout
1778    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1779      from sign change
1780    
1781    checkpoint55j_post
1782    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1783      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1784    o add consistent build directories and .cvsignore files to verification
1785    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1786    o make all subroutines 30 or less characters in length for certain older
1787      compilers to work (a thorough search only turns up two routines in
1788      pkg/ptracers)
1789    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1790      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1791    
1792    checkpoint55i_post
1793    o change arrays for total vertical diffusivity (2.D if explicit,
1794      3.D if implicit) ; each ptracer uses its own background value.
1795    o added mnc/NetCDF output capability to ocn_compon_interf
1796      - added bits to verification/cpl_aim+ocn so that it can run on
1797        ITRDA and other clusters without the mpirun "-wd" option
1798    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1799      configuration
1800    o give MNC the ability to create additional files rather than
1801      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1802      - the default is just less than 2GB which is a practical limit
1803        on many systems
1804    o Compute the non-local term using either KPP vertical diffusivity (=default)
1805       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1806    
1807    checkpoint55h_post
1808    o add verification test "vermix"
1809    o remove all the *_ioinc flags and replace with the single global
1810      outputTypesInclusive flag
1811    o allow to set a vertical profile of vertical diffusivity for T & S
1812    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1813    o useMNC moved from data.mnc to data.pkg
1814    
1815    checkpoint55g_post
1816    o Renaming carbon AD experiments to comply with testreport conventions
1817    o Updating adjoint of Held-Suarez hs94.1x64x5
1818    o Fixing directives for non-ECCO forward_step, after ECCO directives
1819      have been fixed to avoid recomp. of do_oceanic_phys
1820      Works well for global_ocean.90x40x15,
1821      but recomp. issue remains for carbon
1822    o Updating adjoint output for natl_box_adjoint after
1823      pkg/ecco has been modified (see taga c55d_post)
1824    
1825    checkpoint55f_post
1826    o rename to timeave_init_fixed
1827    
1828    checkpoint55e_post
1829    o some delicate re-shuffle of store directives to avoid one
1830      extra call of do_oceanic_physics
1831      affects ecco_the_main_loop.F, do_oceanic_physics.F
1832      checkpoint_lev1_directives.h
1833    o NB: this may break global_ocean adjoint temporarily,
1834      but it is clear how to fix it. Will do later, need this now.
1835    
1836    checkpoint55d_post
1837    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1838    o ecco_cost_weights is modified to 1x1 runs
1839    o modifs to allow observations to be read in as
1840      single file or yearly files
1841    o enable to read exf forcing fields as either
1842      single file or yearly files (flag useExfYearlyFields)
1843    checkpoint55d_pre
1844    
1845    o switch between 2-level and 3-level checkpointing
1846    o add ability of MNC to write local and "partial" (eg. 2D slices where
1847      the full 3D field is never actually stored) arrays to NetCDF files
1848      with the correct (that is, the complete multi-dimensional) set of
1849      array indicies
1850      - used in mom_vecinv() to write the diagFreq output
1851      - tested (demonstrated) in verification/aim.5l_cs
1852    o further mnc-ification
1853      - add verification/lab_sea to the list with mnc setups
1854      - fix undefined mnc v-names in cd_code
1855      - add kpp to mnc output (both snapshot and timeave)
1856    o non-hydrostatic code
1857      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1858        in calc_gw.F
1859      - defaults to viscAh
1860      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1861        friction or Leith) in non-hydrostatic mode, as long as there is
1862        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1863    o pkg/cost
1864      extend simple cost functions to treat time mean quantities
1865      (T,U,V) via cost_accumulate_state from cost_tile
1866    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1867        be 2 times larger than the minimum size the advection scheme requires.
1868        now get a perfect conservation of salt in advect_cs test-exp (updated)
1869    o GGL90 (Gaspar's TKE mixed layer)
1870      - add horizontal diffusion of TKE, requires exchanges in
1871        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1872        default. In OPA there is no horizontal diffusion of TKE but the
1873        mixing coefficients are computed from a horizontal average of TKE of
1874        6 points or so. I think that diffusion has a little more physical
1875        justification.
1876      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1877        was in vain)
1878      - mask tke-variable in ggl90_init
1879    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1880    o fix biharmonic diffusion on CS-grid.
1881    o more obcs stuff
1882      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1883        for reading boundary values. This routine is called from
1884        obcs_prescribe_read
1885      - updated obcs_check
1886      - changed sponge layer relaxation parameter units for days to seconds
1887      - turned off sponge layer by default
1888      - changed argument list of OBCS_CALC to myTime+deltaTclock
1889      - fixed about 35 bugs in obcs_external_fields_load
1890    
1891    checkpoint55c_post
1892    o obcs stuff
1893      - new runtime flags useOBCSprescribe, useOBCSbalance
1894      - re-arranged obcs_calc
1895      - moved exf_getobcs to obcs_prescibe_read
1896        obcs_prescibe_read is called after ORLANSKI stuff
1897        and independent of it (executable can contain all).
1898      - updated obcs_check
1899      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1900        These may be necessary only if tangential velocities are
1901        prescribed at OB, not sure, needs testing.
1902    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1903      which simplifies the calls and passes the ifc check-bounds test
1904    
1905    checkpoint55b_post
1906    o add a 2D scalar, Z location, exchange_2 routine.
1907    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1908      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1909      affects advect_cs results (for the wrong reason): update output.txt
1910    o use a more standard discretization for biharmonic viscosity ;
1911     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1912      affects results of dome set-up: update output.txt
1913    o fix gad_advection.F (CubedSphere part), back to version 1.23
1914    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1915    
1916    checkpoint55a_post
1917    o merged code to
1918      * prescribe/read time-dependent open boundaries
1919        (works in conjunction with exf, cal)
1920      * sponge layer code for open boundaries
1921      * each boundary N/S/E/W now has its own CPP option
1922        (healthy for the adjoint)
1923    
1924    checkpoint55
1925    o up-to-date adjoint of previous breaks
1926      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1927      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1928      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1929      - carbon: * remove tr1-related adjoint verification
1930                * add ptracer as control variable
1931    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1932      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1933    
1934    checkpoint54f_post
1935    o in verification/carbin/ remove experiment related to
1936      ALLOW_PASSIVE_TRACER (array tr1 etc)
1937      code_ad/ input_ad/ results_ad
1938    
1939    o add two new packages
1940      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1941        + subject to optimization (memory)
1942      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1943        + subject to reordering (many GOTOs in the original code)
1944        + so far opps is called for every (i,j) point, and then operates in
1945          the vertical; one may want to reorder the scheme in order operate in
1946          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1947          fields)
1948    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1949      - all verification tests compile and run with linux_ia32_g77
1950      - defaults are compatible with current input files--nothing
1951        should change if you were not previously using MNC
1952      - MNC output has been added in numerous places (eg. timeave)
1953        but there are still a few writes not yet do-able with MNC
1954        (this is in progress)
1955      - flags now allow for either/or/both use of MDSIO and MNC and
1956        documentation will soon follow
1957      - numerous small formatting cleanups for ProTeX
1958    o add version info (via BUILD_INFO.h) to MNC and stdout
1959    
1960    checkpoint54e_post
1961    o add two new packages
1962      - pp81 (Packanowski and Philander, 1981), Richardson number and
1963        stratification dependent mixing
1964      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1965      - these scheme operate in a similar manner as KPP (without ghat, of
1966        course), however there is only one diffusivity that is used for both
1967        temperature and salinity (and passive tracers)ç
1968    o add offline package
1969    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1970      provided by Stephanie Dutkiewicz
1971    o genmake2: add ability to search for C compilers and cleanup test output
1972      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1973    
1974    checkpoint54d_post
1975    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1976    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1977      leading to additional shift by 5 days each year of integration
1978       (i.e. leading to considerable offset over the years)
1979    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1980    o start with no AB and no initial filtering (staggerTimeStep):
1981      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1982    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1983      (external loading & cpl import/export stay in forward_step.F)
1984    o update coupling interface to work with new staggerTimeStep
1985    o change MDSIO ptracers_pickup.
1986    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1987    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1988    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1989    
1990    checkpoint54c_post
1991    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1992      this affects (truncation error) output.txt of test-exp:
1993       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1994    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1995    o change Qnet to always be the net heat flux, (+upward).
1996      affects (truncation error) output of natl_box exp.: updated
1997    o define the max number of passive tracers in PTRACERS_SIZE.h
1998    o start to test mnc routinely in exp0
1999    o add sea-ice loading (sIceLoad) as a new forcing field.
2000    
2001    checkpoint54b_post
2002    o add testreport "-j JOBS" option for parallel builds (tested and pretty
2003       impressive on Altix and Opteron systems)
2004    o diagnostics can now write NetCDF files through the mnc package
2005    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
2006    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
2007    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
2008      affects (truncation error) output of lab_sea & natl_box exp.: updated
2009    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
2010    
2011    checkpoint54a_post
2012    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
2013    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
2014    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
2015    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
2016      + internal_wave (shift in writing cg2d_ini_res)
2017    checkpoint54a_pre
2018    
2019    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
2020      - modified verification/lab_sea and natl_box_adjoint accordingly
2021    
2022    checkpoint54
2023    checkpoint53g_post
2024    o prepare splitting of thermodynamics: store convect.counter in common block
2025    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
2026      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
2027    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
2028    o new parameter "nShapS": allow to treat differently S from T (nShapT)
2029    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
2030    o restore adjointability
2031    
2032    checkpoint53f_post
2033    o modifications that affect AIM experiment results (update output.txt):
2034      - no advection of S at top interface Nr (pkg/generic_advdiff)
2035      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
2036    o AIM pkg:
2037      - include stability function into surf.Flux derivative relative to Tsurf
2038      - calculate clear-sky radiation & surface temp. change (for diagnostics)
2039    
2040    checkpoint53e_post
2041    o merged cylindrical coord configuration
2042    o added rotating_tank experiment
2043    checkpoint53e_pre
2044    
2045    checkpoint53d_post
2046    o faulks upgraded: re-generate output.txt that have changed:
2047       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
2048    o Added Bryan and Lewis, 1979, vertical diffusivity profile
2049    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
2050    o added Sadourny discretization of Coriolis
2051      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
2052      - re-enabled use of omega3 (useAbsVorticity)
2053    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
2054      vector-invariant equations
2055      - note: does *NOT* yet use same variable visc. for no-slip BC's.
2056    o recoded the lateral boundary conditions for non-hydrostatic w, this time
2057      hopefully without new bugs
2058      - still to do: biharmonic friction for non-hydrostatic w
2059    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
2060    o regenerated output for global_ocean_ebm (using -ieee)
2061    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
2062      of mom_common/
2063      - simple re-arrangement of instructions within computing loop
2064    checkpoint53d_pre
2065    
2066    checkpoint53c_post
2067    o new version of coupler for AIM+thSIce and Ocean models
2068     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
2069     - land: change Evaporation of snow
2070     - aim with thSIce: fix bug in snow-precip.
2071    o changes to calc_gw.F
2072     - bug fix for w^2 term near the bottom boundary
2073     - (hopefully) improve the lateral slip boundary condtions for use with
2074        partial/looped cells
2075      - because the bug fix changes two verification experiments anyway (exp5
2076        and plume on slope), change the lateral boundary condition from half slip
2077        to the value of no_slip_sides
2078    o ebm package wasnt quite up to the parallel task. Fixed that.
2079    o Adjoint of EBM package + verification
2080      * TLM OK
2081      * ADM not sufficient accuracy yet (needs further testing)
2082    
2083    checkpoint53b_post
2084    o Commiting new energy balance model to repository
2085      * package is pkg/ebm
2086      * verif. is verification/global_ocean_ebm
2087      * references are in ebm_driver.F
2088    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2089    C        Global thermohaline circulation. Part I:
2090    C        Sensitivity to atmospheric moisture transport.
2091    C        J. Climate 12(1), 71-82
2092    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2093    C        Global thermohaline circulation. Part II:
2094    C        Sensitivity with interactive transport.
2095    C        J. Climate 12(1), 83-91
2096    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
2097    C        Destabilization of the thermohaline circulation
2098    C        by atmospheric eddy transports.
2099    C        J. Climate 7(12), 1870-1882
2100    o Will need long integration testing.
2101    checkpoint53b_pre
2102    
2103    o created pkg/mom_common in preparation for variable viscosity code
2104    o renamed and split ini_mnc_io
2105    o pkg/land: only liquid water can diffuse or run-off
2106    o AIM using land: soil wetness availability account for snow
2107    o added printMapIncludesZeros to EEPARMS namelist
2108    
2109    checkpoint53a_post
2110    o restore TAMC compatiility for exf_constants.h
2111      (no usage of _d in .h)
2112    o Additional storing in KPP in an attempt to fix
2113      TAMC problem with adjoint of KPP code.
2114      (no success...)
2115      Identical code works fine with TAF.
2116    o Fixed verification/natl_box_adjoint experiments.
2117      Initial conditions for Experiments 4 and 5 are now
2118      set to "SEAICE_initialHEFF=0", which is more reasonable,
2119      and hence gives results closer to that of Experiment 2.
2120      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
2121    
2122    checkpoint53
2123    o stable checkpoint with up to date adjoint
2124      TLM tests only run for 1st grdchk at the moment. Its unclear if
2125      this is a code problem or a problem with resetting code for g_
2126      variables that is being autogenerated wrong.
2127      Otherwise:
2128       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
2129       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
2130         are both still in chaos following their security messes.
2131    
2132    checkpoint52n_post
2133    o various build (mostly genmake2) changes including:
2134      - ability to build/run more easily within Cygwin and MacOS X
2135      - more complicated Makefiles with a stronger dependence on Gnu Make
2136    o pkg/seaice modifications
2137      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
2138        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
2139        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
2140      - changed proxy for geostrophic velocity and updated
2141        verification/lab_sea/results/* accordingly
2142      - removed ADI dynamic solver from pkg/seaice
2143      - replaced all occurrences of 1/CSTICE or 1/CSUICE
2144        they caused a segmentation fault under certain circumstances
2145      - removed unused field WATR
2146    o bug fix in exf-package:
2147      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
2148         now reflect that.
2149    o small fixes in the cal-package:
2150      - set reference date to first of January for the 'model'-calendar
2151      - failing of cal_CheckDate in cal_FullDate now actually results in a
2152        warning
2153    o small modifications in exf-package to increase flexibility:
2154      - change climtempfreeze from a constant to a runtime parameter that
2155        is specified in data.exf_clim (default = -1.9)
2156      - introduce runtime parameter windstressmax (default = 2.0) that is
2157        specified in data.exf
2158    o fix in pkg/thsice:
2159      - update Evap (Tsf changes) to be consistent with Latent heat flux
2160      - maintain snow precipitation unchanged (even if Tsf >=0).
2161     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
2162    
2163    checkpoint52m_post
2164    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
2165      this does not change any of the results, because myIter=0 in swfrac always
2166      lead to jwtype=2 (the default anyway), but the call makes little sense
2167      as a default
2168    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
2169    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
2170      atmospheric model (AIM) to use it ; add a "slab ocean" component.
2171    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
2172    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
2173    o extending useSingleCpuIO option to work with new exch2 I/O format
2174      - old-style, missing-tile I/O is still accessible by defining CPP
2175        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
2176    o monitor package can write to NetCDF files and/or STDOUT
2177    o fix re-definition bug in MNC_GRID_INIT_ALL()
2178    o doc/api_reference added
2179      - a framework for building an API Reference Manual using all
2180        the "protex" comments embedded in the code
2181      - see pkg/generic_advdiff, pkg/mnc for examples
2182    o MNC:
2183      - make myThid the last argument for all subroutines
2184      - new default for the grid files: NO halos
2185      - add useMNC and other run-time flags
2186      - separate per-file-group handling of the unlimited dimension
2187      - early initialization of MNC w/ flags read at the eeboot stage
2188        and lookup tables set in initialize_fixed
2189      - write all MNC output to a freshly-created directory
2190    o thermodynamics sea-ice (thsice) is now tested with testreport.
2191    o test exp. advect_cs: use the standard cs32 grid ; update output.
2192    o Added functionality to grdchk:
2193      pick global i,j,k position (or nearest wet) where to perform check.
2194    
2195    checkpoint52l_post
2196    o new land formulation:
2197      a) use ground enthalpy as prognostic variable to ensure exact
2198         energy conservation.
2199      b) account for water temperature and for latent heat of freezing
2200         in all processes (rain, run-off, ground storage)
2201      c) compute surface and ground temperature implicitly.
2202    o aim_v23 modification for new land model:
2203      a) Treat separately land / ocean / sea-ice surface fluxes
2204         to allow implicit computation of land & sea-ice surface temp.
2205      b) add snow precipitation.
2206    checkpoint52l_pre
2207    
2208    o fix problem (when 1 tile is empty) in min/max monitor.
2209    o fix bug in timeAve (u,vZetatave in common block)
2210    o no restoring terms under ice for pkg/seaice
2211    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
2212    o bug fix for pkg/seaice pickups
2213    o change MNC call locations and add coordinate attributes
2214    o mask vorticity at the corner ; affects global_ocean.cs output
2215    o fix ini_curvilinear_grid ; test CS experiments with mpi
2216    o aim.5l_cs: modify sea-ice fraction input file ; update output
2217    o exf: Adding simple range check routine for exf fields after read
2218    
2219    checkpoint52k_post
2220    o removed top-level directory "diags"
2221      - we migrated these functions to pkg/timeave a long time ago
2222    o fixed bug introduced in pkg/monitor
2223    o accuracy ctrlprec = 32 insuffient for gradient checks using
2224      averaged fields (I/O via cost_averages)
2225      -> use ctrl.h in active_file*.F to control I/O precision.
2226    o paramter list of CALL ADTHE_MAIN_LOOP
2227    o added initial do_the_model_io to ecco
2228    o set all ...Freq to zero after cost_final
2229      taveFreq, dumpFreq, pChkptFreq
2230    o MAIN and ECCO differentiability restored
2231    
2232    checkpoint52j_post
2233    o fix nchklev in tamc.h for global_ocean...
2234    o Bringing flow and store directives up-to-date
2235    o Really weird thing!
2236      call do_the_model_io from the_main_loop with parameters
2237      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
2238      TAF places a faulty re-call of initialise_varia
2239      after cost_final call which should not be there!
2240    checkpoint52j_pre
2241    
2242    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
2243      error messages
2244    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
2245    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
2246      debug output
2247    o modfied mdsio_writefield.F to handle non-global files under exch2
2248    o update AIM Cubed-Sphere exp (aim.5l_cs):
2249      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
2250    o update AIM Equatorial Channel exp:
2251      use standard aim_v23 pkg and change the SST fields to be more realistic.
2252    o globalFile now works with exch2
2253    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
2254      mon_vort3.F to make exch2 friendly with >1 tile per cube face
2255    o limit timeave output for hi-res integrations
2256    
2257    checkpoint52i_post
2258    o removed CPP_EEOPTIONS.h from verification/*/code
2259    o updated the tiling for global_ocean_pressure
2260    checkpoint52i_pre
2261    
2262    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
2263      the old pkg/aim).
2264    
2265    checkpoint52h_pre
2266    o shortened offending lines in exch2_send_rx?.template
2267    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
2268    o genmake2: add build & execute test for NetCDF code
2269    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
2270      old grid files, moved CPP_EEMACROS.h to pkg/exch2
2271    o added useSingleCPUIO flag to monitor.F and mon_out.F
2272    o added temporary hack for sea-ice dynamics on the cube:
2273      metric terms are ignored and it is assumed that
2274      there is no sea-ice on cube faces 1, 2, 4, and 5.
2275    
2276    checkpoint52f_post
2277    o added exch2 cube routines to pkg/exch2
2278    o modified hs94.cs-32x32x5 to use it
2279    o added new grid files to hs94.cs-32x32x5
2280    checkpoint52f_pre
2281    
2282    checkpoint52e_post
2283    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
2284      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
2285    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
2286      to work with implicit vertical advection and AB ;
2287    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
2288    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
2289     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
2290    checkpoint52e_pre
2291    
2292    o fix bug in impldiff when Nr=1 or Nr=2.
2293    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
2294    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
2295    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
2296      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
2297    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
2298    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
2299    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
2300    
2301    checkpoint52d_post
2302    o re-tiled many expts to allow comparison in multi-processor mode
2303      - updated output accordingly
2304      - changed hs94.128x64x5 to use intial T from file rather than use the
2305        random number generator
2306    o add infrastructure in model routines for fizhi and gridalt packages
2307    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
2308    o changes to permit hi-res, cubed-sphere, configuration
2309      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
2310      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
2311      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
2312        of surface winds for the cube
2313      (A verification experiment, based on global_ocean.cs32x15, but with
2314       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
2315       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
2316       complete with example surface forcing files and matlab scripts to look
2317       at the output and compare it with that of global_ocean.cs32x15.)
2318    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
2319       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
2320       to conform to the common rule.
2321    o check-in the first version of the coupler + interfaces for multi-components
2322       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
2323       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
2324       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
2325       - ocean and atmos. share the same horizontal grid (no interpolation).
2326       - exchanges between component and coupler is done in forward_step
2327    o new verification experiment, cpl_aim+ocn:
2328       coupled ocean - AIM atmosphere on cs32 grid.
2329    
2330    checkpoint52d_pre
2331    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
2332    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2333    
2334    checkpoint52c_post
2335    o Fixing OPTIONS files for use of exf:
2336      - ALLOW_ECCO not needed
2337      - ECCO_CPPOPTIONS.h should not be included from
2338        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2339        as has been the case in the past
2340      - All cal/exf related options are currently set in
2341        single header file. Should remain so until we
2342        agree on a consistent new policy.
2343    o Removed all CPP options for cal package.
2344      cal has no more CPP options.
2345    o modified STOREs in GAD_ADVECTION
2346    o corrected key comp. for passkey
2347    
2348    checkpoint52b_post
2349    o new version: "thsice" of thermodynamic sea-ice pkg:
2350     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2351     - modify fluxes but do not change theta directly;
2352     - light cleaning of bulk_force pkg (still needed with thsice).
2353     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2354       + output_thsice.txt to test thsice & bulk_force pkgs.
2355    o put back grid & coriolis monitor output.
2356    checkpoint52b_pre
2357    
2358    o call "do_the_model_io" at the beginning (=> dump initial state)
2359    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2360    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2361      (need info on NUMBER_OF_PTRACERS)
2362    o missing PTRACERS headers in some routines
2363    o default tamc.h in pkg/autodiff supposed to crash
2364      to ensure proper customization
2365    
2366    checkpoint52a_post
2367    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2368      - moved surfaceTendencyTice from pkg/seaice to main code
2369      - subroutine FREEZE_SURFACE now limits only surface temperature
2370        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2371        => new output.txt for global_ocean.cs32x15 & global_with_exf
2372      - keep the old version of FREEZE for backward compatibility;
2373        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2374      - corresponding modifs for TAF directives
2375    o added surface flux output variables to TIMEAVE_STATVARS
2376    o time-averaged output for pkg/ptracers
2377    o fix problem with ECCO-related divided adjoint
2378      snapshot file was missing some ad-variables,
2379      but no warning issued by TAF
2380    
2381    checkpoint52a_pre
2382    o some bug fixes for #undef REAL4_IS_SLOW
2383    
2384    checkpoint52 = ecco_c52_e35
2385    o after testing adjoints of checkpoint51u_post
2386    
2387    checkpoint51u_post
2388    o this is the post-merge tag of the ecco-branch
2389      (needs another clean checkout and re-testing)
2390    o various natl_box_adjoint configs and results
2391      but no input fields
2392    o obcs adjoint not yet merged!
2393    o adding ECCO global 1x1 and 2x2 degree configs
2394    o updated/extended some store directives for seaice
2395    o pkg/ecco now containes ecco-specific part of cost function
2396    o top level routines the_main_loop, forward_step
2397      supersede those in model/src/
2398      previous input data.cost now in data.ecco
2399      (new namelist ecco_cost_nml)
2400    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2401    
2402    checkpoint51t_post
2403    o this is the pre-merge tag of the ecco-branch
2404    
2405    checkpoint51s_post
2406    o cleanup: removed various obsolete #define-s
2407    o pkg/grdchk
2408      - renamed 'ph-grd 3' to 'grad-res'
2409      - merged from ecco-branch
2410        (remaining bug fixes for obcs gradient checks)
2411      - additional high-precision output for testreport
2412        (grep for 'precision_grdchk_result')
2413    
2414    checkpoint51r_post
2415    o cleaned up or removed CPP_OPTIONS.h files
2416    o updated results for some of the tests to reflect the new
2417      optfiles (-ieee: -O0 instead of -O3)
2418    
2419    checkpoint51q_post
2420    o cd_code:
2421      - moved cd_scheme.F -> cd_code_scheme.F
2422      - separate read_checkpoint from cd_code_ini_vars.F
2423      - separated cd_code part from write_checkpoint
2424      - updated AD_SOURCE, generated .flow
2425      - added CD_CODE_VARS.h to the_main_loop
2426      - Moving cd_code specific store dir.s to pkg/cd_code
2427    o ctrl package totally restructured
2428      - pack/unpack now optional and decoupled from
2429        xx_/adxx_ I/O
2430      - ctrl_pack/unpack cleaned
2431        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2432      - confined inclusion of AD_CONFIG.h to where necessary.
2433    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2434    
2435    checkpoint51p_post
2436    o create initial cd_code package
2437      - WARNING: the initialization of fields within packages
2438        is broken because INI_FIELDS (where READ_CHECKPOINT is
2439        called) is called *before* PACKAGES_INIT_VARIABLES.
2440        This seems to be backwards since
2441        1) its important to initially zero the entire field including
2442           the "halo" region
2443        2) zeroing needs to be done *before* reading pickup info
2444           and the pickup call might or might not happen in any
2445           particular run
2446      - this needs an overhaul for R2
2447    o cleanup verification/*/code/GMREDI_OPTIONS.h
2448    o cleanup testreport
2449    
2450    checkpoint51o_post
2451    o bringing AD-related verif's up to date with genmake2
2452      - carbon/
2453      - global_ocean.90x40x15/
2454      - hs.94.1x64x5/
2455      - (front_relax/ )
2456    o (more) consistent directory structure for AD-related verif.'s
2457    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2458    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2459    o bug fix in find_alpha.F for MDJWF:
2460      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2461        change rho -> rho-rhoConst
2462      - replace call find_rho to find_rhonum
2463    o initialisation of rFlx extended to full array (required by TAF)
2464      and shifted to thermodynamics
2465    o removed PTRACERS.h in ptracers routine
2466    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2467    o Correcting initialisations for fVerU, fVerV.
2468    o helping TAF to recognize dependency on kUp for
2469      fVerU, fVerV
2470    o Replacing delZ by delR in pkg/ctrl/
2471    checkpoint51o_pre
2472    
2473    o undid all of cp51 pending some cleanups and discussion
2474    o added the [#include "AD_CONFIG.h"] statement to all files that need
2475       it for adjoint/tl #defines
2476     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2477     o removed tools/genmake since it no longer works
2478    
2479    checkpoint51n_post
2480    o modifications to make FREEZE flux visible to pkg/kpp
2481      - moved surfaceTendencyTice from pkg/seaice to main code
2482      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2483      - subroutine FREEZE now limits only surface temperature
2484        (this means new output.txt for global_ocean.90x40x15,
2485         global_ocean.cs32x15, and global_with_exf)
2486    o added surface flux output variables to TIMEAVE_STATVARS
2487    
2488    checkpoint51n_pre
2489    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2490    o added [#include "AD_CONFIG.h"] to all files that use the following
2491      defines:
2492      - ALLOW_ADJOINT_RUN
2493      - ALLOW_TANGENTLINEAR_RUN
2494      - ALLOW_ECCO_OPTIMIZATION
2495    
2496    checkpoint51m_post
2497    o incorporating changes to get TAMC/TAF working in genmake2
2498      - added new TAMC/TAF targets to the Makefile
2499      - various cleanups related to package handling
2500      - these changes should have no impact on the forward model
2501    
2502    checkpoint51l_post
2503    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2504     - faster algorithm for cal_addtime.F
2505     - higher precision arithmetic, where needed
2506     - pkg/exf *startdate variables changed from calendar date to
2507       model integration time
2508    
2509    checkpoint51l_pre
2510    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2511    o enable to apply restoring on S & T only in a latitude band.
2512    o update output (external_forcing_surf modif. change truncation errors)
2513       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2514    
2515    checkpoint51k_post
2516    o change default to: useNHMTerms=.FALSE.
2517     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2518       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2519     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2520        exp1, ideal_2D_oce
2521     - change data file of oceanic exp (leave the results unchanged for now)
2522       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2523    o set gravitySign automatically according to the vertical coordinate used
2524      (and change sign: back to "logical" value: +1 when R increases downward)
2525    o added an include barrier to the default CPP_OPTIONS.h and
2526      removed the #include "PACKAGES_CONFIG.h" from it
2527    o fix a bug in mom_fluxform (from chk51j_post)
2528    
2529    checkpoint51j_post
2530    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2531    o adjusted some flow directives (dynamics, thermodynamics)
2532    o added cubed-sphere case to test cost function
2533    o heckpoint_lev?_directives.h now include
2534      pkg-specific directives, whenever those are enabled.
2535    o Moving pkg-specific flow directives to corresponding pkg
2536      Moving pkg-specific differentiation list to corresponding pkg
2537      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2538      ---> conventions are
2539           - pkg_ad.flow
2540           - pkg_ad_diff.list
2541           - pkg_ad_check_lev?_dir.h
2542    
2543    checkpoint51i_post
2544    o merge of the branch-genmake2
2545      - knowingly breaks the older genmake
2546      - automatic generation of all ALLOW_${PKG_NAME} defines
2547      - new testreport supersedes older testscript
2548    o large number of package inclusion and header cleanups
2549    checkpoint51i_pre
2550    
2551    o new output for adjoin of global ocean vector invariant
2552    o fix for checkpoint of thermodynamic seaice and bulk_force
2553    o Steph gchem various cleanups
2554    
2555    checkpoint 51h_pre
2556    o fixed some single quotes
2557    o modify gchem pkg to be more versatile
2558    o modifications to clean up dic pkg
2559    o add pkg/cfc
2560    
2561    checkpoint51g_post
2562    o provide links for ARPACK and ADM*TLM
2563    o start removing verification/vero/
2564    o update AD-related stuff
2565      (in particular some IF-statements in model/src/ routines)
2566    o adding to verification/global_ocean.90x40x15/ adjoint of
2567      vector invariant setup
2568    
2569    checkpoint51f_post
2570    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2571    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2572      of tracer Green's fucntions for ocean inversion project.
2573    
2574    checkpoint51f_pre
2575    o Added on-the-fly spatial interpolation capability
2576        "USE_EXF_INTERPOLATION" to pkg/exf.
2577      - This is a temporary Cartesian-grid hack until
2578        the super-duper ESMF coupler becomes available.
2579      - See verification/global_with_exf/README for usage example.
2580      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2581        flags and modified pkg/seaice accordingly.
2582    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2583        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2584        non-local transport term.
2585    
2586    checkpoint51e_post
2587    o pkg/mom_vecinv:
2588      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2589      - add time-ave diagnostic of vorticity advection.
2590    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2591    o atmospheric geopotential: - include water vapor effect;
2592                                - use p^kappa in p* scaling.
2593    o land pkg: read initial state from files.
2594    o AIM : add stratospheric drag in the upper level
2595    
2596    checkpoint51d_post
2597    o change function ILNBLNK (=> last non-blank char.) to return zero
2598      (instead of the string length) when the string. char is empty
2599    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2600    o modif's to restore TAMC compatibility
2601      - avoid "_d" constructs in PARAMETER declarations
2602      - avoid interrupting lines by comment lines
2603    o Use cluster local disks for purely local I/O
2604      vs. globally visible disks needed for ctrl stuff
2605      (merged from ecco-branch)
2606      - new active_file_loc... and mdsio_..._loc routines
2607      - affected packages: autodiff, ctrl, grdchk, mdsio
2608    
2609    checkpoint51c_post
2610    o introducing integer flag debugLevel
2611      - debLevZero: suppress all output
2612      - debLevA: standard
2613      - debLevB: equivalent to current debugMode=.TRUE.
2614    o introducing pathname variable mdsioLocalDir for mdsio
2615      that can be specified at runtime
2616      (relevant for cluster I/O to local disk)
2617    `
2618    >>>checkpoint51b_post
2619    adjoint of ptracers
2620    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2621    o extended state in checkpoint_lev?, etc.
2622    o alternative ctrl/cost with tr1 or ptracer
2623    o new comlev1_bibj_ptracers
2624    o new ptracers.flow
2625    o made ptracers_forcing same as external_forcing_s
2626    o added verification for adjoint with ptracers
2627      - adm. grdchk fail so far
2628      - tlm. grdchk OK
2629      - checked tapelev/comlev recomputations: OK
2630    <<<checkpoint51b_pre
2631    
2632    checkpoint51a_post
2633    o added code for biogeochemistry package
2634      - new pkgs: dic, gchem
2635      - new subroutine in ptracers
2636    o modify code for biogeo packages
2637      - in model/src and pkg/ptracers
2638    
2639    checkpoint51
2640    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2641      - autodiff, ctrl, exf, grdchk, seaice
2642      kept separate packages
2643      - cost, ecco, obcs
2644    o updating verification/internal_wave, verification/lab_sea
2645      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2646    
2647    checkpoint50i_post
2648    o Preparing next differentiable checkpoint and sync
2649      of MAIN vs. ecco-branch
2650      - 1st step: this one is differentiable
2651      - 2nd step: next(! not this) checkpoint will have updated packages
2652                  from ecco-branch)
2653    
2654    checkpoint50h_post
2655    o new package "land": provide surface BC for AIM.
2656    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2657    o AIM: use true log-P extrapolation for near surface temp (= as in
2658        F.Molteni paper) ; update aim.5l_cs output.
2659    o New variable in PARM03 for more flexible pickups
2660    o somewhat cleaned package initialisation sequence for
2661      ctrl/ cost/ ecco/ in packages_... routines
2662    
2663    checkpoint50g_post
2664    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2665      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2666      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2667        made the default because of faster convergence than ADI
2668    
2669    checkpoint50f_post
2670    o exf totally restructured
2671      - replaced all exf_set_ routines by one generic exf_set_gen.F
2672        and made sure it's still differentiable
2673      - split exf_getffields.F into new exf_bulkformulae.F
2674      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2675      - updated adjoint/makefile and relevant verif. accordingly
2676    
2677    checkpoint50f_pre
2678     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2679          + change Evap over land. (update aim.5l_cs output)
2680     o added missing .cvsignores and made uniform across expts
2681     o changed configuration of tidal_basin_2d expt
2682     o added pkg/debug functions for tracing code in fatal crashes
2683     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2684     o new fn in pkg/monitor to stop model if solution grows too big
2685     o removed lots of single quotes from comments
2686    
2687    checkpoint50e_post
2688    o make KPP work with PTRACERS
2689     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2690       nearly a copy of kpp_transport_s
2691     - there is no analogue to SurfaceTendencyS, so I have to use
2692       gPtr(of the surface layer) instead
2693    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2694    checkpoint50e_pre
2695    
2696    checkpoint50d_post
2697    o change kpp output from multiple-record state files to single-record state
2698      files analogous to write_state.F
2699    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2700      analogous to the cg2d-related output.
2701    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2702      so that writing to internal file fn (with length 512) fails.
2703    checkpoint50d_pre
2704    
2705    checkpoint50c_post
2706    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2707    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2708    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2709    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2710    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2711    
2712    checkpoint50c_pre
2713    Merging from release1_p13:
2714    o bug fix for pkg/seaice dynamic solver
2715    o Added SEAICE_initialHEFF to pkg/seaice
2716    
2717    checkpoint50b_post
2718    o store u*,v* in gU,V instead of in guNm1,gvNm1
2719    o in order to put the momForcing out of the Adams-Bashforth:
2720      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2721      to timestep.F
2722    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2723    o re-generate output for highly sensitive test-exp:
2724       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2725    
2726    checkpoint50b_pre
2727    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2728    o corrected CPP option mismatch in exf_Bulk... functions for case
2729      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2730    
2731    checkpoint50a_post
2732    o Bug fix for merging between c50 and KPP.
2733      ikey was passed from thermodynamics to kpp_calc via
2734      common block rather than being recomputed in kpp_calc,
2735      in contradiction with new key itdkey.
2736      New key ikppkey created, and tamc.h headers updated.
2737    
2738    checkpoint50
2739    - 2nd step of merge with ecco-branch:
2740      merge changes in ecco-branch back into main trunk
2741    - bug fix in find_alpha
2742    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2743    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2744    - merged some sliced AD support routines
2745    
2746    checkpoint49
2747    merged from ecco-branch:
2748    o exf:
2749      - Enable initialisation of forcing fields to constant
2750        (runtime) values.
2751      - in exf_getffields.F
2752        Reduce i-/j-loop to interior domain, discarding overlaps.
2753        That also fixes wrong TAF-key computations for key_1, key_2
2754        with bulf formulae.
2755      - exf_init.F modify #ifdef for exf_init_evap
2756      - exf_getffieldrec.F, ctrl_getrec.F
2757        The following INT-usages are not safe:
2758          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2759          fldcount = int(fldsecs/fldperiod) + 1
2760        and were modified.
2761    o autodiff: checkpoint_lev...
2762      - updated storing for bulk formulae (some arrays were missing)
2763      - added state for seaice package
2764      - synchronized with main branch
2765    o DIVA:
2766      Modif.s in
2767      - the_main_loop.F
2768      - the_model_main.F
2769      and added cost_final_restore.F cost_final_store.F
2770      o With these changes, it is possible to fully separate
2771        the first forward run to compute the cost function (mdthe_main_loop)
2772        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2773        into separate model executions.
2774        This enables better tuning of DIVA to given queue sizes.
2775      o Loss of cost function value in consecutive DIVA runs is
2776        fixed by storing to 'costfinal' file.
2777      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2778        beginning/end of adjoint integration is accounted for.
2779      The current changes apply to TAF-1.4.26.
2780      TAF has one remaining bug, requiring one manual change
2781      (see MITgcm manual).
2782    o cal: synchronized between MAIN and ecco-branch
2783    
2784    checkpoint48i_post
2785    o Changes to restore differentiability of code w.r.t. previous tag
2786      (mostly adding new routines to make list and replacing
2787      pressure by totPhiHyd).
2788    o Updated and merged grdchk package
2789      - has both ADM and TLM checks
2790      - works for single- and multi-proc.
2791      - output cleaned
2792      - worked successfully for parallel DIVA
2793    o genmake:
2794      - Adding -platform=SP4
2795      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2796    o Modif. for DIVA:
2797      ctrl_unpack should not be called in intermediate DIVA interval.
2798      (similar thing would apply for active files such as
2799      tbar, sbar, psbar, which should not be reinitialised;
2800      only relevant for ecco-branch)
2801    
2802    checkpoint48h_post
2803    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2804    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2805    o Added SEAICE_initialHEFF to pkg/seaice
2806    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2807    
2808    checkpoint48g_post
2809    --- EOS:
2810    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2811      store total Potential in totPhyHyd for diagnostics & EOS.
2812    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2813    --- Pressure/geopotential gradient:
2814    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2815    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2816      ( changes results of global_ocean_pressure )
2817    o NLFS + z-coord.: add eta*Rho' contribution.
2818    o accurate phiHyd when using interface-W at the middle between 2 centers
2819     ( changes results of ideal_2D_oce )
2820    o includes r* 2nd term in potential gradient.
2821    
2822    checkpoint48f_post
2823    Merging from release1_p12:
2824    o Modifications for using pkg/exf with pkg/seaice
2825      - improved description of the various forcing configurations
2826      - added basic radiation bulk formulae to pkg/exf
2827      - units/sign fix for evap computation in exf_getffields.F
2828      - updated verification/global_with_exf/results/output.txt
2829    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2830      (SBO) core products, including oceanic mass, center-of-mass,
2831      angular, and bottom pressure (see pkg/sbo/README.sbo).
2832    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2833      to avoid negative values in shallow regions.
2834      - updated verification/natl_box/results/output.txt
2835      - updated verification/lab_sea/results/output.txt
2836    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2837    o Added useSingleCpuIO option (see PARAMS.h).
2838    o Updated useSingleCpuIO option in mdsio_writefield.F to
2839      work with multi-field files, e.g., for single-file pickup.
2840    o pkg/seaice:
2841      - bug fix in growth.F: QNET for no shortwave case
2842      - added HeffFile for specifying initial sea-ice thickness
2843      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2844    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2845      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2846    o pkg/seaice:
2847      - adjoint-friendly modifications
2848      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2849    
2850    checkpoint48e_post
2851    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2852    o dynamics: change definition of computational domain & adapt mom_fluxform
2853      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2854    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2855        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2856        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2857        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2858        inverted_barometer solid-body.cs-32x32x1
2859      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2860    
2861    checkpoint48d_post
2862    o in preparation for r*:
2863     a) use pre-computed gradient of hydrostatic potential:
2864        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2865     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2866        => affects results of glob_oce_pressure (different truncation error)  
2867      update output.txt of ideal_2D_oce & global_ocean_pressure
2868    
2869    checkpoint48d_pre
2870    o in preparation for r*:
2871      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2872      pass the 2 comp. of the grad. as arguments to momentum S/R.
2873      but for the moment, only used if it does not change the results.
2874    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2875    
2876    checkpoint48c_post
2877    Modifications in treatment of initial flux forcing controls
2878    to avoid extra storing of flux fields.
2879    
2880    checkpoint48c_pre
2881    o Added tidal_basin_2d experiment (currently 1D!)
2882    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2883    
2884    checkpoint48b_post
2885    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2886     (modification to pressure gradient not yet implemented)
2887    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2888      (for U & V) that are used for vertical advection of momentum.
2889    
2890    checkpoint48a_post
2891    o In preparation for r*, use temp. array to compute vertical transport
2892       in flux-form momentum pkg. => change results of few test-exp.
2893      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2894                        lab_sea, natl_box & plume_on_slope
2895    
2896    checkpoint48
2897    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2898    
2899    checkpoint47j_post
2900    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2901    o moved adexch from forward_step to addummy_in_stepping
2902    o added exch in ctrl_map_...
2903    o aveFreq.=0. at end of cost_final to avoid overwrite in
2904      reverse checkpointing loop
2905    o Yet more changes in gmredi:
2906      * adgmredi_calc_tensor
2907        avoiding all recomputation of gmredi_slope_limit
2908      * adgmredi_x/y/rtransport
2909        added flag for excessive storing to avoid recomp. of
2910        u/v/rtans, dTdx/y/z
2911        -> this is not really necessary and very memory-consuming
2912      * adgmredi_slope_psi:
2913        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2914      * gmredi_slope_limit
2915        re-activated full calculation of taperfct for case 'ac02'
2916    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2917    
2918    checkpoint47i_post
2919    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2920    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2921      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2922    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2923    o gmredi: fix few bugs.
2924    
2925    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2926    This will be a good checkpoint to plug into the ecco-branch.
2927    o few modif.'s to get latest version adjointed
2928      (mainly kick out code in ini_linear_phisurf)
2929    o modif's to run adjoint with exactConserv
2930    o case GM_BOLUS_ADVEC should be cleaned
2931      S/R gmredi_slope_psi should be cleaned
2932    o verification/carbon now has exactConserv=.TRUE.
2933    
2934    checkpoint47g_post
2935    o time-average AIM output: becomes independent from statvars time-average
2936      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2937    o After TAF bug fix:
2938      Tested adjoint of gmredi package.
2939      Tests were done with checkpoint47 rather than with latest
2940      checkpoint47f_post since the latter is broken for the adjoint
2941      verification/carbon/ contains both ADM and TLM gradient checks.
2942    Here they are, before they get changed/lost/stolen.
2943    Mostly modif.'s to fix numerical sensitivities.
2944    Gradient checks OK for
2945    - GM_taper_scheme:
2946      * clipping
2947      * ac02
2948      * linear
2949      * glw91
2950      * dm95
2951      * ldd97
2952    - GMREDI_OPTIONS:
2953      * GM_VISBECK_VARIABLE_K
2954      * GM_NON_UNITY_DIAGONAL
2955      * GM_EXTRA_DIAGONAL
2956      * GM_BOLUS_ADVEC
2957    in conjunction with data.gmredi parameters to be checked in
2958    in a few minutes under verification/carbon/code/
2959    
2960    checkpoint47f_post
2961    Merging from release1_p10:
2962    o modifications for using pkg/exf with pkg/seaice
2963      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2964        and SEAICE_EXTERNAL_FLUXES
2965      - pkg/exf CPP options EXF_READ_EVAP and
2966        EXF_NO_BULK_COMPUTATIONS
2967      - usage examples are Experiments 8 and 9 in
2968        verification/lab_sea/README
2969      - verification/lab_sea default experiment now uses
2970        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2971    
2972    checkpoint47e_post
2973    o created a tag prior to creating a branch
2974    
2975    checkpoint47d_post
2976    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2977      at the bottom boundary had an erroneous half slip boundary condition
2978    o added bottom drag and no slip boundary condition capabilities to
2979      oceanic pressure coordinates code
2980    o added new verification experiment global_ocean_pressure, this experiment is
2981      also described in the tutorial section of the manual
2982    checkpoint47d_pre
2983    
2984    checkpoint47c_post
2985    o Added a verification experiment for a global cubed-sphere ocean run
2986      -  verification/global_ocean.cubed32x32x30
2987      -  uses pkg/therm_seaice and pkg/bulk_forcing
2988    
2989    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2990    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2991      when using P-coordinate; only implemented for atmospheric config.
2992    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2993      NOTES: requires option NONLIN_FRSURF to be "#define".
2994    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2995    
2996    checkpoint47b_post
2997    Merging from release1_p9:
2998    o pkg/seaice
2999      - removed GOTO's and added taf directives
3000      - double precision constants to reduce the g77 (Linux)
3001        to F77 (SGI) differences reported in release1_p8
3002    o tools/genmake
3003      - added SGI options
3004    o verification/testscript
3005      - updated to that of checkpoint47a_post
3006    o verification/global_ocean.90x40x15/input/eedata
3007      - modified for SGI f77 compatibility
3008    o verification/lab_sea
3009      - added description of sea-ice model
3010      - added missing matlab routines
3011      - added test of thermodynamics parallelization
3012    
3013    checkpoint47a_post
3014    o new pkg: aim_v23
3015     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
3016       for now, keep the same surface forcing as before.
3017     - Part-Cell implemented into AIM; check that Heat & Water are conserved
3018     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
3019     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
3020    o add diagnostic of surface correction term in monitor output
3021    
3022    o bulk_force and therm_seaice
3023    - Two packages:  bulk_force (Bulk forcing)
3024      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
3025    - Earlier integration from Stephaine Dutkiewicz
3026      and Patrick Heimbach.
3027    - Two ifdef statements for compile time,
3028       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
3029    
3030    checkpoint47
3031    differentiable version of checkpoint46n_post
3032    o bug fix in quasihydrostaticterms
3033    o * "clean" adjoint code (in terms of extensive recomputations)
3034        can now be obtained for all GMREDI options (i.e. for
3035        - GM_VISBECK_VARIABLE_K
3036        - GM_NON_UNITY_DIAGONAL
3037        - GM_EXTRA_DIAGONAL
3038        - GM_BOLUS_ADVEC )
3039      * However, wrong gradient check problem remains unsolved.
3040      * New CPP options have been introduced for different
3041        tapering schemes
3042    o external_fields_load now part of differentiation list
3043    o pressure needs multiple storing;
3044      would be nice to have store_pressure at beginning or
3045      end of forward_step, e.g. by having phiHyd global (5-dim.)
3046      (NB: pressure is needed for certain cases in find_rho,
3047      which is also invoked through convective_adjustment).
3048    o recomputations in find_rho for cases
3049     'JMD95'/'UNESCO' or 'MDJWF' are OK.
3050    o #define ATMOSPHERIC_LOADING should be differentiable
3051    o ini_forcing shifted to begining of initialise_varia
3052    o Incorporating QNVS line search routines into MITgcm
3053      (this is separate code, and therefore not under pkg)
3054      lsopt/, optim/
3055    o Updated verification/carbon/
3056      - #define GM_VISBECK_VARIABLE_K
3057      - GM_taper_scheme    = 'ldd97'    
3058    
3059    checkpoint46n_post
3060    Merging from release1_p8:
3061    o verification/natl_box:
3062      updating new external_fields_load routine
3063    o New package: pkg/seaice
3064      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
3065      The sea-ice code is based on Hibler (1979-1980).
3066      Two sea-ice dynamic solvers, ADI and LSR, are included.
3067      In addition to computing prognostic sea-ice variables and diagnosing
3068      the forcing/external data fields that drive the ocean model,
3069      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
3070      The implied surface heat flux is then stored in variable
3071      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
3072      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
3073      non-local transport term.  Because this call precedes model
3074      thermodynamics, temperature under sea-ice may not be "exactly" at
3075      the freezing point by the time theta is dumped or time-averaged.
3076      N.B.: fairly large differences in accuracy occur across
3077            different platforms/compilers; comparison between
3078            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
3079            generated output gives:
3080       T           S           U           V
3081      C D M    c        m  s        m  s        m  s        m  s
3082      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
3083      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
3084      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
3085    
3086      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
3087    o GAD:
3088      - generated new common blocks to account for call of
3089        same gad routines with differing traceridentities
3090        (needed to modify tracerIdentity indices in GAD.h)
3091      - generated separate common blocks for case useCubedSphereExchange
3092        (Department of Futurology)
3093      - parameter lists to gmredi_?transport: added tracerIdentity
3094      - added new key indices to tamc.h
3095    o external_fields_load:
3096      - added this routine to TAF list
3097      - needed to make some common blocks global and additional storing
3098        along the same lines as exf package (checkpoint_lev?_directives.h)
3099    o exf:
3100      updated external forcing package
3101      - bug fixes carried over from ecco-branch
3102        (missing OBCS_OPTIONS.h in two routines)
3103      - enable easy to use "no forcing".
3104      - added exf I/O for atmospheric loading
3105      - added exf I/O for runoff data
3106      - transfered scaling between exf <-> MITgcm to exf namelist
3107    o Adding new verification experiment global_with_exf.
3108      This verification experiment is almost identical to the
3109      global_ocean.90x40x15 experiment, except that it uses
3110      the exf (and cal) package instead of the
3111      external_fields_load routine (cf README file).
3112    
3113    checkpoint46m_post
3114    o modified testscript to return -- when there are no lines of "%MON" output
3115    o added new flag "quasiHydrostatic" for QH mode
3116      and new routine quasihydrostaticterms()
3117    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
3118      New routine: mom_u_coriolis_nh()
3119    o fixed sign of non-hydrostatic metric terms in u and v equations.
3120      Depend on correct sign of gravitySign.
3121    o added work.pc* to .cvsignore in aim directories using ifc
3122    o introduced flag for controllin non-hydrostatic metric terms
3123    o removed gravitySign from PARM04
3124    o switched to g77/ifc from pgf77 in aim experiments
3125    
3126    checkpoint46l_post
3127    o made convective adjustment work with pressure coordinates:
3128     - changed the direction of k-loop in convective_adjustment.F for the
3129       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
3130     - adjusted the reference pressure k-index in convective_adjustment.F
3131     - adjusted the convection condition in convect.F (in analogy to
3132       calc_ivdc.F)
3133     - convective_adjustment no longer computes anything on the halos
3134     - removed the warnings about negative salinity from find_rho.F and
3135       find_alpha.F; instead the new routine look_for_neg_salinity, called
3136       at the beginning of find_rho, find_alpha, and find_beta, does a
3137       check of the entire slice, if CPP-option
3138       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
3139    checkpoint46l_pre
3140    
3141    checkpoint46k_post
3142    o fixed the verification/global_ocean.90x40x15 experiment:
3143     - new bathymetry (the world according to A., JMC, and M.)
3144     - new initial fields and forcing fields (*.bin files)
3145     - new POLY3.COEFFS (for the next release one should switch to a full
3146       equation of state: JMD95P or MDJWF)
3147     - fixed several errors and redundancies in the data file
3148     - experiment uses looped cells
3149     - added matlab directory with diagnostic scripts for plotting of output
3150    
3151    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
3152     - read AIM physics parameters from a file (data.aimphys)
3153     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
3154    
3155    checkpoint46j_post
3156    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
3157    o move wVel computation at the end of the time step, in S/R integr_continuity
3158    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
3159    o update timeave pkg for wVel diagnostic.
3160    checkpoint46j_pre
3161    
3162    checkpoint46i_post
3163    o Clean up AIM package (and keep the results unchanged):
3164      include CPP_OPTION and use IMPLICT NONE in all routines ;
3165      declare all the variables _RL ; use _d 0 for all numerical constants.
3166      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
3167    
3168    checkpoint46h_post
3169    o cleaned up the use of rhoNil and rhoConst.
3170      - rhoNil should only appear in the LINEAR equation of state, everywhere
3171        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
3172        and the dynamical equations are all divided by rhoConst
3173    o introduced new parameter rhoConstFresh, a reference density of fresh
3174      water, to remove the fresh water flux's dependence on rhoNil. The default
3175      value is 999.8 kg/m^3
3176    o cleanup up external_forcing.F and external_forcing_surf.F
3177      - can now be used by both OCEANIC and OCEANICP
3178    checkpoint46h_pre
3179    
3180     Added code to convert surface volume flux (fresh water) into
3181     a mass flux when using P coordinates in the ocean (OCEANICP).
3182     Note: It assumes you have set rho0=rhoConst=density of fresh water.
3183    
3184    checkpoint46g_post
3185    o Include a new diagnostic variable phiHydLow for the ocean model
3186      - in z-coordinates, it is the bottom pressure anomaly
3187      - in p-coordinates, it is the sea surface elevation
3188      - in both cases, these variable have global drift, reflecting the mass
3189        drift in z-coordinates and the volume drift in p-coordinates
3190      - included time averaging for phiHydLow, be aware of the drift!
3191    o depth-dependent computation of Bo_surf for pressure coordinates
3192      in the ocean (buoyancyRelation='OCEANICP')
3193      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
3194        Theta, Salinity, and Pressure in the parameter list. This routine is
3195        presently contained in find_rho.F. This routine does not give the
3196        correct density for 'POLY3', which would be a z-dependent reference
3197        density.
3198    o cleaned up find_rho
3199      - removed obsolete 'eqn' from the parameter list.
3200    o added two new verification experiments: gop and goz
3201      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
3202    checkpoint46g_pre
3203    
3204    checkpoint46f_post
3205    o Enable tangent linear (forward mode) gradient checks:
3206      - extended active file handling to g_... files
3207      - added TANGENT_SIMULATION to theSimulationMode
3208      - extended grdchk package accordingly
3209    o added tangent linear setup in verification/carbon/code_ftl
3210    o added adjoint setup in verification/front_relax/code_ad
3211    
3212    checkpoint46e_post
3213    o Added new equation of state -> MDJWF
3214      - EOS of McDougall et al., 2002, JAOT, submitted
3215      - caveat: the equation of state is only valid for a smaller (more
3216        realistic?) range of values than JMD95P/Z and UNESCO
3217      - added masks to the calculation of pressure in store_pressure
3218      - added more check values for density in check_eos (ini_eos.F), some of
3219        the old check values are out of the range of the MDJWF-eos, so don't
3220        expect perfect matches for those
3221    checkpoint46e_pre
3222    
3223    checkpoint46d_post
3224    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
3225      'OCEANICP', also initialised field pressure correctly in ini_eos in the
3226      case of pressure coordinates. eosType='JMD95Z' in
3227      combination with buoyancyRelation='OCEANICP' now causes an error.
3228    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3229      in find_alpha/beta.
3230    checkpoint46d_pre
3231    
3232    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3233      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
3234    
3235    checkpoint46c_post
3236    o Changes necessary for ocean in p-coordinates
3237     -  Added new buoyancy relation = 'OCEANICP'
3238     -  Added new parameters = gravitySign (this used to be contained inside
3239        the factor dRdZ which I added when we first switched to R coordinates).
3240     X GM/Redi is not compatible (yet)
3241     X bottom drag and no-slip need to be debugged.
3242    checkpoint46c_pre
3243    
3244    checkpoint46b_post
3245    o Added new equation of state -> JMD95Z and JMD95P
3246      - EOS of Jackett and McDougall, 1995, JAOT
3247      - moved all EOS parameters into EOS.h
3248      - new routines ini_eos.F, store_pressure.F
3249    o Added UNESCO EOS, but not recommended because it requires
3250      in-situ temperature (see JMD95)
3251    o Modified formatting for knudsen2.f in utils/knudsen2 and added
3252      unesco.f to be used with POLY3
3253    checkpoint46b_pre
3254    
3255    checkpoint46a_post
3256    o Added (atmospheric) pressure loading
3257      - new field in FFIELDS.h, etc...
3258      - new cpp flag ATMOSPHERIC_LOADING
3259    o Changed hFacC to _hFacC in calc_phi_hyd.F
3260    o Added SHORTWAVE_HEATING to some files for consistency
3261    checkpoint46a_pre
3262    
3263    checkpoint46
3264    further merges from release1_p5
3265    o new ctrl package
3266      - adopted from ECCO environment to enable optimization
3267      - added Eliassen Palm fluxes to controls
3268    o added Eliassen Palm flux controls to gradient check package
3269    o cost package
3270      - Compatible with new ctrl package
3271      - added Eliassen Palm cost hooks
3272      - modif's of existing cost functions
3273    o Adjoint-related bug fixes in kpp:
3274      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
3275      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
3276    o autodiff package
3277      - flow directives:
3278        + new for S/R do_the_model_io
3279        + enhanced for S/R checkpoint
3280        + new gmredi.flow
3281      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
3282        disable adcommon.h/g_common.h by default.
3283      - fixed problem for adjoint of global_max
3284    o modified verification/carbon/
3285    o New setup for adjoint of global_ocean
3286    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
3287    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
3288    o incorporated hooks for sponge layer code (external_forcing.F)
3289    
3290    checkpoint45d_post
3291    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
3292    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
3293      (affects plume_on_slope "cg2d" output)
3294    o add new parameter deltaTfreesurf for free-surface time stepping
3295    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
3296    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
3297    o change phiMin in exp1 (to agree with documentation)
3298    o add new flags:
3299     - T,S forcing inside/outside Adams-Bashforth
3300     - turn off temp,salt advection and/or forcing
3301     - for each tracer, define internal flag for multiDimAdvection & A-B
3302    o monitor: change definition of KE to check conservation of Energy
3303    
3304    checkpoint45c_post
3305    o Removed f90 comments ("!")
3306    o Modified initialisations to enable exf package for MITgcm
3307      (without invoking ECCO_PACKAGE).
3308    o modifications to gradient check package (Martin Losch)
3309      - enable centered differences
3310      - modified format of standard output
3311    
3312    checkpoint45b_post
3313    o cleaned exchange calls in cg2d
3314    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
3315    o included CPP option SINGLE_LAYER_MODE in thermodynamics
3316      to configure barotropic setup (Martin Losch)
3317    o moved some initialisations within bi,bj loop in dynamics
3318      (TAF flow dependency)
3319    o in initialise_varia, moved call packages_init_variables
3320      before convective_adjustment_init
3321      (corresponding adjustment of TAF tape initialisation).
3322    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
3323    
3324    checkpoint45a_post
3325    o compute Rho over the whole domain (extend iMin,jMin indices)
3326    o specific exchange for X-slice domain (case Ny=1)
3327    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
3328    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
3329    
3330    checkpoint44h_post = checkpoint45
3331    o Fix to restore differentiability:
3332      place at which packages_init_variables is called in
3333      initialise_varia is crucial for reverse control flow.
3334    o modifications in GMRedi to enable stable adjoint
3335      (corresponding modif's in thermodynamics, dynamics)
3336    o added missing hook for sponge layer code in external_forcing
3337    o modified test cost functions
3338    o storing in gad_advection (plus removal of write(0,*)!
3339    o missing headers TR1.h added in convective_adjustment routines
3340    o errorMessageUnit set non-equal zero in eeboot
3341      (conflict on some platforms, e.g. IBM SP3)
3342    o modified carbon verif.
3343    
3344    checkpoint44h_pre
3345    o vertical grid option: allow to put the Interface at the middle between
3346      2 cell-centers ; replace delZ in pkg/kpp by drF.
3347    o GM Advective form: Tracers are advected using the residual transport (=
3348      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3349    
3350    checkpoint44g_post
3351    o fix surface correction term in multiDimAdvection (affects plume_on_slope
3352      results) ; ifdef missing in thermodynamics.F
3353    
3354    checkpoint44f_pre,checkpoint44f_post
3355    o added PTRACERS package
3356      This allows an arbitrary number of passive tracers to be integrated
3357      forward simultaneously with the dynamicaly model.
3358      + Implemented so far:
3359        - basic forward algorithm (time-stepping, advection, diffusion, convection)
3360        - I/O and checkpointing
3361        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
3362      + Not implemented so far:
3363        - KPP
3364        - OBCS
3365      + No specific example supplied (yet) but global_ocean.90x40x15 has the
3366        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
3367        line in data.pkg.
3368      + This package is disabled by default since it increases storage.
3369    
3370    
3371    o testscript: added -cleanup option
3372    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
3373                 b) enable to filter 2D fields.
3374    
3375    checkpoint44e_pre,post
3376    o re-wrote convective adjustment to use pre-calculated weights
3377      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3378      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3379      Original calls to convect() still in place.
3380    
3381    chkpt44d_pre,post
3382    o added missing EXCLUDE_MONITOR flags
3383    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3384      (incompatible typ in MIN/MAX expressions caused problems
3385      on IBM SP3)
3386    o in genmake added variable MAKEDEPEND
3387      plus resetting for case SunOS
3388    o added timer_stats.c routine for IBM SP3
3389    o removed variables in dynamics
3390    !!! I forgot to create tag chkpt44d_pre !!!
3391    !!! But chkpt44d_pre = chkpt44c_post    !!!
3392    
3393  o real fresh water flux implemented with non-linear free-surface.  o real fresh water flux implemented with non-linear free-surface.
3394    
3395  chkpt44c_pre,post  chkpt44c_pre,post

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