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revision 1.34 by heimbach, Tue Jan 30 20:51:26 2001 UTC revision 1.1172 by mlosch, Fri Oct 9 11:15:45 2009 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 autodiff
8     - fix bug in autodiff_restore
9     - make genmake2 remove comments and empty lines from ad_input_code.f in
10       order to reduce file size (new script file remove_comments_sed)
11    o allows to specify vertical profile of vertical viscosity (viscArNr)
12    o pkg autodiff
13      autodiff_ini_model_io: comment out writing of grid information to netcdf
14      files, because at this time the grid fields are a bunch of zeros
15      (this is analogous to ini_mnc_vars.F)
16    o pkg seaice/autodiff:
17     left-over from removing the 3-time-level fields:
18     - small rearrangement of common blocks (SEAICE.h)
19     - fix field declaration in order to get meaningful output in
20       adseaice.*.nc (adcommon.h)
21    o pkg obcs:
22     - go through NH code only if nonHydrostatic=T
23     - fix restart for Orlanski (Hydrostatic; still to fix NH+Orlanski restart)
24     - move call to OBCS_CALC before SEAICE_MODEL which needs seaice-obcields
25       => Update output of experiment seaice_obcs
26     - useOBCSbalance: code is wrong with multi-tile / proc: add a stop.
27     - fix NH+Orlanski restart (add wvel OBC value in pickup file)
28     - fix restart for useOBCSprescribe + useEXF
29    o pkg ctrl
30     - make obcs as control parameter work also with useSingleCPUio
31     - replace a few sny and snx by Ny and Nx to be consistent with
32       ctrl_set_globfld_x/yz.F
33    o pkg seaice
34     - re-introduce global field frWtrAtm for the case of
35       ALLOW_MEAN_SFLUX_COST_CONTRIBUTION defined (SEAICE.h, seaice_growth.F)
36     - catch the case of an empty filename in seaice_cost_init_fixed.F
37    o pkg ecco:
38     - small bug fixes in the_main_loop
39      . fix order of monitor arguments
40      . change SEAICE_MULTILEVEL to SEAICE_MULTICATEGORY
41      . move include DYNVARS.h up outside the ALLOW_AUTODIFF_TAMC block so
42        that ALLOW_ECCO_FORWARD_RUN works with NONLIN_FRSURF
43     - replace cos(yc*deg2rad) by _rA in cost_mean_heat/saltflux.F, fix the
44       imbalance diagnostics for wmean_h/sflux = 0
45     - add actual values to f_obcsn/s/w/e in ecco_cost_final.F
46     - catch the case of empty filenames in ecco_cost_init_fixed.F
47       and ecco_readparms.F
48     - fix the logic of wsalt=0.and.wsalt2=0 to wsalt=0.or.wsalt2=0 (and theta)
49       to make this statement meaningfull in ecco_cost_weights.F
50    o pkg zonal_filt:
51      - change ZONAL_FILTER S/R interface (allows to filter 2-D fields)
52      - when using rStar, filter uVel*hFacW instead of uVel
53       (tested without topography: fix a Pb of growing instability with NLFS)
54    o pkg/aim/thsice:
55     -Add capacity to read a Q-Flux to be applied in slab-mixed layer thsice_slab_ocean.F
56      (works as SST restoring)
57    o pkg/thsice:
58     -add specific parameter for salt restoring in slab mixed-layer
59       (by default equal to the temperature restoring)
60    
61    checkpoint61v
62    o pkg/kpp:
63     -add double diffusive contributions as a hack, turned off by default
64      for now, and the code can be excluded with a CPP-flag
65      EXCLUDE_KPP_DOUBLEDIFF just as EXCLUDE_KPP_SHEAR_MIX
66     -add a verification experiments to "vermix" to test this code
67    o pkg/mom_common:
68      Move computation of length scales to mom_init_fixed.F (avoid recomputation
69      at each time-steps*levels).
70    o pkg/layers:
71      Created a new package for computing volume fluxes in temperature or
72      [not yet implemented] density layers, e.g. for calculating residual
73      overturning circulations.
74    o pkg/diagnostics:
75      implement a RS type version for the set of DIAGNOSTICS-FILL subroutines
76    o fix few RS/RL type mismatch (check with ifort 11.1 "-warn all" option)
77    o pkg/mdsio (& pkg/rw): rework high level S/R interface:
78      To avoid mixing type (RS/RL) of input/output array argument,
79      replace single mixed-type array with a pair from each type (RS/RL).
80    o setting pickupSuff force to start from a pickup (even if nIter0=0): this
81      is now implemented for all pkgs (previously only done for the main pickup)
82    
83    checkpoint61u
84    o pkg/obcs:
85      - change OB?eta from _RS to _RL and put them into a separate commen block
86      - add code to read OB?eta from a file via obcs_prescribe_read: the code
87        compiles and does not destroy any other experiments, the data is read
88        properly, but the code is not tested in actual applications
89    o ini_mnc_vars.F: if available (ALLOW_CAL), use startTime_1 and 2 to
90      create a meaningful unit attribute for the time coordinate variable
91    o pkg/ebm: add plenty of missing "_d 0" ;
92       update results of experiment global_ocean_ebm (fwd + adjoint tests)
93      Notes: several pieces of code only works for (very) specific set up
94       (domain size, lat range, etc ...); should be documented & stop if one
95       of those assumptions is not meet.
96    o pkg/seaice: add missing "_d 0" in HSNOW initialisation
97       update results of experiments: lab_sea (3 fwd tests + 2 adjoint tests)
98          and offline_exf_seaice (seaicetd + adjoint).
99    o add missing "_d 0" in ShortWave flux penetration (S/R SWFRAC):
100       update results of experiments: lab_sea (4 fwd tests + 3 adjoint),
101        seaice_obcs, global_ocean.cs32x15 (icedyn & thsice) and natl_box (x2).
102    o few changes to pass when compiling with strick checking of arguments
103       across S/R (allow to find few bugs in S/R calls).
104    o pkg/seaice:
105     - seaice_evp: move if-statement out of loop (TEM) at the cost of 11 new
106       2d-fields, for slightly better performance
107    
108    checkpoint61t
109    o pkg/seaice:
110     - remove unused variables in seaice_evp
111     - reduce number of SQRT in seaice_evp and seaice_calc_viscosities
112    o eeset_parms.F, open_copy_data_file.F & ini_parms.F:
113       named file replacing SCRATCH files (for TARGET_BGL & TARGET_CRAYXT):
114       each processor opens a different file (a fix from Matt).
115    o cg2d:
116       use simple EXCH (overlap size = 1 and ignore corners), like in cg3d.F :
117       this reduces number of EXCH calls by 2 when using exch2.
118       For now, keep previous size array for gc2d_nsa.F to avoid Pb with store
119       directives and missing simple EXCH (exch_s3d_rx) adjoint code.
120    o pkg/thsice:
121       add code for Near Infra-Red albedo (from Jeff)
122       (turned on with run-time flag: thSIce_calc_albNIR, in data.ice).
123    o ini_model_io:
124       move (from packages_readparms.F & initialise_fixed.F) to ini_model_io.F
125       MNC & MONITOR initialisation calls; move MNC calls from {pkg}_readparms.F
126       to {pkg}_init_fixed.F for {pkg}= kpp, seaice & shelfice.
127    
128    checkpoint61s
129    o pkg/exch2 (exch2_rxN_cube*):
130       remove last BARRIER (no need to synchronise after getting data from shared
131       buffer (get) as long as any change to buffer (put,recv) is between BARRIER)
132    o change tiling of natl_box (from 2 to 4 tiles) to get it tested with MPI+MTH
133      and generate new output (for the 2 tests) using default rotationPeriod.
134    o pkg/exch2:
135      - always call exch2_*_cube, not exch-1 anymore, if useCubedSphereExchange=F
136        (was already the case with AUTODIFF_EXCH2 defined)
137      - add bj in exch2 arrays and S/R.
138      - can now use pkg/exch2 for regular (non CS) set-up; switch test experiment
139        MLAdjust to exch2 (identical results except with MPI -> truncation diff);
140    o add pkg/longstep for ptracer timestep a multiple of U/V/T/S timestep
141      - adds deltaT argument to the subroutines TIMESTEP_TRACER DWNSLP_APPLY
142        GAD_ADVECTION GAD_CALC_RHS GAD_IMPLICIT_R GAD_SOM_ADVECT
143      - verification experiment natl_box.longstep
144    o build_options: ifort+mpi_aces optfile (following Constantinos advise):
145      allow different versions of ifort (8 or 9) and different versions
146       of mpi (mpich or mpich2) to be used with the same optfile.
147      requires to load a netcdf module and set MPI_INC_DIR (see comments inside
148       optfile). Change testing scripts (example_scripts/ACESgrid) accordingly.
149    o pkg/seaice:
150      fix previous modif (3-level field removed) for old-pickup reading
151    
152    checkpoint61r
153    o pkg/seaice:
154     - clean up the 3-time levels of UICE,VICE,HEFF,AREA in three steps:
155      1. introduce fields for time step (N-1)
156      2. do not use levels 2 and 3 anymore (but keep them)
157      3. replace 3D versions of UICE,VICE,HEFF,AREA by 2D versions. This
158         includes changes to pkg/thsice/thsice_get_velocity.F,
159         model/src/external_forcing_surf.F, pkg/obcs/obcs_apply_seaice.F, and
160         pkg/obcs/obcs_apply_uvice.F.
161     - completely remove code for leap-frog time stepping for second order
162       advection
163     - adjusted adjoint accordingly;
164       gradient checks have improved by an order of magnitude!
165    
166    checkpoint61q
167    o pkg/seaice: fix bug in free slip boundary conditons for LSOR solver
168     - the boundary conditions along open boundaries are unclear, because the
169       associated masks are set to zero and are thus treated as closed when
170       applying the slip-boundary conditions.
171     - move initialisation of grid variables from seaice_init_varia to _fixed
172    o adding doc/diags_changes.txt
173    o model/src:
174      do_the_model_io: rename few pkg S/R which are called from do_the_model_io,
175       to avoid "_diags" naming if no relation to pkg/diagnostics.
176      ini_theta,ini_salt: fix (at least compile the code) reading from NetCDF
177       file and only call PLOT_FIELD_XYZ if debugMode=T.
178      remove few PLOT_FIELD_XY calls outside initialisation.
179      remove few unnecessary BARRIER.
180    o pkg/salt_plume: add SaltPlumeSouthernOcean to allow disabling
181      of salt_plume package in Southern Ocean
182    o pkg/thsice:
183     - fix hOceMxL in overlap (needed for sea-ice advection);
184       update output of experiment global_ocean.cs32x15.icedyn.
185    o pkg/seaice:
186     - make the (placeholder-)tracer IceAge a little more meaningful
187      by avoiding ridging of age due to convergent ice flow
188     - add diagnostics for surface temperature, atmospheric and oceanic
189       heat flux, and atmospheric and oceanic ice growth
190    
191    checkpoint61p
192    o eesupp (global_max & global_sum):
193     - add one more element to buffer (start at index 0) for GL_MAX/SUM output;
194     - remove starting & endding barrier (no longer needed)
195    o pkg/mdsio, writelocal:
196       works also in multi-threaded when LOCBIN_IO_THREAD_SAFE is undefined
197       (remove the STOP): uses shared buffer IO to store data from all threads
198       and then let master-thread write nThreads tiles.
199    o pkg/mdsio (read/write field):
200     - tiled IO done in 1 piece (all levels at a time);
201     - new header file "MDSIO_BUFF_3D.h" with 3-D buffers.
202     - multi-threaded: allow to read/write local (non-shared) array
203       (was already working with singleCpuIO ; now works also without);
204       => no longer needs barrier call after reading a file (added inside
205       mds_read/write field).
206     - move barrier calls outside gather/scatter_2d to mds_read/write_field
207    o pkg/obcs/exf
208      - exf_getffieldrec.F: add a few ". _d 0" and
209                            add code to catch the case fldperiod = 0.  
210      - obcs_precribe_read.F: change if statements so that they match
211                              the variable type (_RL)
212      - add a separate exf_iprec_obcs to exf_set_obcs (by default equal to
213        exf_iprec) as part of namelist EXF_NML_01
214    o pkg/mdsio:
215      - read/write tiled (local) files: read/write 1-level tile chunk at a time
216        (instead of segment of length sNx); expected to speed up tiled IO.
217    o pkg/exch2:
218      - take buffer copy from/to array out of S/R exch2_send/recv into new
219        S/R exch2_put/get ; Exch of local variable now works with MPI+MTH
220        (tested by removing commom block statement in SOLVE_FOR_PRESSURE.h).
221      - ad version of send/recv no longer needed (but needs exch2_ad_put/ad_get)
222      - simplify argument list of S/R exch2_get_uv_bounds and exch2_get_scal_bounds
223        (which replaces exch2_get_recv_bounds & exch2_get_send_bounds) by
224        including Topology header file (and common blocks).
225      - implement EXCH_IGNORE_CORNERS in scalar exchange (rx1);
226        remove 2nd exch call in exch2_s3d_rx (no longer needed).
227      - document S/R arg. list (+ update some comments)
228    o pkg/seaice:
229      - added SEAICE_CLIM_AIR code, which permits modulation of surface air
230        temperature and humidity over sea ice based on climatological values.
231      - clean up computation of Hibler+Bryan (1987) stress coupling for the case
232        of LSR (this change is expected to change the results slightly because now
233        it uses slightly difference moduli from the second last LSR solution, but
234        that is more consistent with the stress computations; this part of the code
235        is not tested in the verification experiments)
236      - fix diagnostics for flux of ice in case of B-grid
237      - turn strain rates eij and press into global fields within global
238        common block in SEAICE.h for more straighforward diagnostics
239      - fix diagnostics for principal stress components, press, zeta, eta
240        to give something meaning full
241    o change tiling of global_ocean.cs32x15 (12 tiles, 32x16) and generate
242      new output (all 4 tests) using default rotationPeriod.
243    o pkg KPP:
244      - add flag (LimitHblStable) to avoid limiting BL depth under stable conditions
245      - fix vertical indices in RI_IWMIX (match between KPP grid from 0 to Nr+1
246        and normal grid from 1 to Nr)
247    o Fix computations of L4rdt in mom_calc_visc.F
248    o eesupp:
249      new S/R ALL_PROC_DIE (like EEDIE, without irrelevant threads err msg):
250      should be called before a "stop" if we know that all process are going
251      to stop; if one Proc does call this S/R, will hang in MPI_FINALISE.
252    
253    checkpoint61o
254    o pkg/exch2: change check_depths to issue just a warning (instead of error+stop)
255    o model/src/ini_curvilinear_grid.F:
256       compute angleSin/CosC when they are not read from a file
257    o pkg/seaice:
258       add pseudo time stepping for LSOR
259    o pkg/exch2:
260       temporary fix for exch2_s3d_rx; update results of exp. hs94.cs-32x32x5.impIGW
261    o pkg/seaice:
262       Adding separate sea ice albedo, drag coefficients, and HO in Southern
263       Ocean from those in Arctic Ocean.  See *_south in SEAICE_PARAMS.h
264    o SingleCpuIO:
265       fix bug put before chkp61n (May 11), when more than 2 MPI cpu are used.
266    o pkg/seaice:
267       put exchanged variable in (local) common block for MPI+Multi-Threads
268       to work (necessary with exch1, and for now with exch2 too).
269    o verification: to get more experiments tested with mpi, mth and mpi+mth,
270      change tiling of:
271       aim.5l_Equatorial_Channel, aim.5l_LatLon, dome, exp4, global_ocean.90x40x15,
272       hs94.cs-32x32x5, MLAdjust, offline_exf_seaice & tutorial_plume_on_slope
273      update output of exp:
274       exp4, global_ocean.90x40x15(+.dwslp), MLAdjust(all 5),
275       tutorial_plume_on_slope and hs94.cs-32x32x5 (use default rotationPeriod)
276      + ideal_2D_ocean: use default rotation period + test Global_Sum_SINGLECPU
277                       (note: output.txt generated on faulks using only 1 tile)
278    o eesupp & mdsio (SingleCpuIO):
279     - remove MISSING_TILE_IO (from MDSIO_OPTIONS.h), replaced by run-time
280       parameter "W2_useE2ioLayOut" (read from file "data.exch2").
281       Note: was not effective for globalFile & useSingleCpuIO=F; now fixed.
282     - move MDSIO_SCPU.h (pkg/mdsio) to EEBUFF_SCPU.h (eesupp/inc).
283     - fix GLOBAL_SUM_SINGLECPU when using Exch2; re-use same buffers and same
284       gather/scatter S/R as with SingleCpuIO (=> 1 less 2D global RL array).
285    o pkg/exch2:
286     - new code to set-up W2-Exch2 topology (replace matlab-topology-generator):
287       read parameter file "data.exch2" if it exists; otherwise try default regular
288       cube without blank-tile; new header file "W2_EXCH2_SIZE.h";
289     - update matlab-topology-generator (exch2_setup_cs6_print.m) to be compatible
290       with new code (not to be used, just as a backup solution).
291     - add examples (e.g., for lat-lon-cap_120) of parameter file "data.exch2"
292       in utils/exch2/input.
293    
294    checkpoint61n
295    o eesupp & mdsio (SingleCpuIO):
296      - move mapping to global io-buffer inside gather_2d/scater_2d: this save
297        memory (1 less 2D global RL array); skip 1 buffer copy; and only send/
298        receive real*4 array (instead of real*8) to read/write 32.bit files.
299        (new template for gather_2d/scater_2d, new set of S/R MDS_PASS_R4,8toRL,S
300         and remove new mapping S/R)
301    o pkg/mdsio: in preparation for topology-generator within pkg/exch2:
302      - Change declaration of SingleCpuIO buffer, reduced to only 1 dim.:
303        xyBuffer_size, which is set to W2_ioBufferSize from W2_EXCH2_PARAMS.h
304        when using exch2. Add S/R to map global io-buffer to global model array.
305      - uses exch2_global_Nx,y instead of exch2_domain_nxt,nyt.
306    
307    checkpoint61m
308    o write_utils : change WRITE_1D_R8 to WRITE_1D_RL
309      and add 3 other S/R for other types (R4,R8,RS).
310      Change calls to WRITE_0D/1D_R[4,8,S,L] to match the type of argument.
311    o eesupp/inc/CPP_EEMACROS.h (EXCH & GLOBAL_SUM/MAX macros):
312     - ensure suffix (_R4,_R8,_RS,_RL) correspondance between macro and S/R ;
313     - reduce number of macro definitions (keep only those which are used);
314       can always call directly the corrresponding S/R if needed.
315     - everywhere in the code: change macros (EXCH & GLOBAL_SUM/MAX) suffix
316       _R4/_R8 to _RS/_RL when applied to _RS/_RL variable.
317     Fixed wrong type of arg in:
318       atm2d/put_ocnvars.F cheapaml/cheapaml.F ocn_compon_interf/ocn_apply_import.F
319       ctrl/ctrl_map_ini_ecco.F seaice/seaice_do_diags.F seaice/seaice_model.F
320     To fix: global_sum of var in common block is wrong (multi-threaded) in:
321       dic/dic_atmos.F ebm/ebm_area_t.F ebm/ebm_zonalmean.F sbo/sbo_calc.F
322     To fix: aim_v23/aim_do_co2.F (BARRIER & GLOBAL_SUM within bi,bj loops)
323    o adjustment.cs-32x32x1: test "blank tiles" when compiling with mpi; 2nd
324      "nlfs" mpi test is going to stop when checking for unconnected tile egdes.
325    o eesupp/src: new S/R to stop everyone when 1 (or more) Proc. find an error
326    o pkg/exch2: new S/R EXCH2_CHECK_DEPTHS to check that unconnected tile
327      edges are closed (zero depth); might happen with "blank tiles";
328      for now, disabled if using OBCS.
329    o tools/gemake2: delete modifs from March 27-29 2009 (with option "-mpi":
330      link *_mpi files from "MODS" dir) to return to a strait-forward behavior.
331    o move read_write.F to write_utils.F ; new parameter (maxLengthPrt1D)
332      to reduce length of 1.D array print in STDOUT.
333    o adjustment.cs-32x32x1: changed to oceanic test with 1 continent
334      + use 48 tiles (16x8): this will allow to test "blank tiles".
335    o start to test MPI + multi-threaded (change testreport to skip tests
336      where number of tiles do not match).
337    o genmake2: add option "-omp" to turn on Open-MP ;
338      passed to testreport (if using -mth) ; merge few (*+mth) optfiles.
339    o pkg/exch2 (+ utils/exch2): ignore blank tiles (instead of removing them)
340      and keep the original tile numbering. Note: compatible with old
341      W2_EXCH2_TOPOLOGY.h & w2_e2setup.F topology files.
342    
343    checkpoint61l
344    o Overlaps had been forgotten in calculating ijk keys : fixed
345    o fix cyrus makedepend for gcc 4.4
346    o experiment fizhi-cs-aqualev20:
347      switching to new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE)
348      and generate new output. Note: new output is much closer to the old
349      one (v1.8) generated with pgf77 -O2 on Mar 14 2007 than it is from
350      the previous one (v1.9) generated with pgf77 -O0 on Jun 13 2007.
351    o pkg/fizhi:
352     - change to avoid indices going deliberately over array-bounds
353     - remove unnecessary MPI stuff
354     - perpetual spring equinox with "#define FIZHI_USE_FIXED_DAY"
355     - new version of S/R GETPWHERE available with #define TRY_NEW_GETPWHERE:
356       does not go over array-bounds and therefore returns reliable output.
357     - in fizhi_driver.F & fizhi_turb.F, fix "get_alarm" calls:
358       this S/R has 4 output arguments, which are used inside "get_alarm";
359       when it is called with the same variable "ndum" in place of several
360       output arguments, this produces weird side effect inside "get_alarm"
361      (e.g., datein=dates(n) is overwritten by timein=times(n) since both
362       datein & timein, resp. 2nd and 3rd arg., are pointed to the same "ndum"
363       address) and produces error.
364    o tools/gemake2: (March 27-29 2009)
365      with option "-mpi": link *_mpi files from "MODS" dir (this is what
366      testreport does).
367    o lab_sea experiment: change from 2x1 tiles to 2x2 tiles and regenerate output
368    o pkg/seaice: fix bug in new version of S/R SEAICE_LSR.F:
369       update lab_sea.lsr & lab_sea.salt_plume results
370    o pkg/seaice:
371      Major overhaul of the LSOR solver: change discretization from original
372      finite differences to finite volume. The old routine is still in the
373      file seaice_lsr.F and can be turned on with the CPP-flag
374      SEAICE_OLD_AND_BAD_DISCRETIZATION
375      Along with this change, the discretization of the strain rates is changed.
376      The same flag turns on the old discretization in seaice_calc_strainrates.F
377      All verification experiments with seaice are affected (except for
378      seaice_exf_offline); global_ocean.cs32x15/input.icedyn recovers the old
379      results by setting the above flag.
380      Further changes involve changes in defaults:
381      - ALLOW_FLOODING is defined and turned on by default
382      - SEAICEadvSnow = .true. is now the default
383      - SEAICEadvSalt = .true. is now the default
384      - SEAICEadvAge  = .true. is now the default
385      - SEAICE_clipVelocities  = .false. is now the default
386                                         (as per J. Zhang's recommendation)
387      - B-grid, and thus not tested: SEAICE_TEST_ICE_STRESS_1/EXPLICIT_SSH_SLOPE
388        is defined, SEAICE_TEST_ICE_STRESS_1 is renamed into SEAICE_BICE_STRESS
389      - seaice_growth: replace computation of UG by a simple copy from wspeed
390    
391    checkpoint61k
392    o pkg/seaice: a few bug fixes mostly concerning the metric terms:
393      seaice_lsr: fixed a few metric terms,
394                  affects lab_sea.lsr, lab_sea.salt_plume, seaice_obcs
395                  add more debugging diagnostics
396      seaice_evp: removed superfluous many metric terms of FV discretization
397                  of stress divergence
398                  affects lab_sea, lab_sea.hb87
399      seaice_ocean_stress: removed superfluous many metric terms of FV discretization
400                  of stress divergence for non-evp solver
401                  (this part is not tested anywhere)
402      seaice_calc_strainrates: fixed a bug in no-slip boundary conditions,
403                  they were effectively only half slip
404                  affects lab_sea.hb87
405      updated all relevant verification experiments (except lab_sea//output_adm.txt
406        which was left over, but fails at level 7 & 6)
407    
408    checkpoint61j
409    o pkg/seaice: turn a few hard wired parameters into run time parameters
410    o pkg/seaice/exf/monitor: turn netcdf coordinate variable T into model
411      time in seconds as promised by the usints in seaice_monitor and exf_monitor
412    o pkg/mnc: fix the coordinate variables for multi-tile curvi-linear grids
413      that are not cubed-sphere grids
414    o pkg/seaice: fix a bug for the rare case of SEAICE_VECTORIZE_LSR
415    o pkg/ctrl:
416      fix bug in ctrl_depth_ini.F (EXCH_XYZ was applied to 2-D field xx_r_low)
417    o non-hydrostatic (calc_gw.F):
418      fix viscA4 on CS-grid + fix diagnostics: Wm_Diss & Wm_Advec
419      update output of exp. global_ocean.cs32x15.viscA4
420    o remove backward compatibility for thetaMin,phiMin
421      (replaced by xgOrigin,ygOrigin on Jan 27, 2009)
422    o pkg/exf: fix a serious bug in exf_set_uv.F: do a rotation of the
423      interpolated wind field not only for curvilineargrid=.true., but also
424      for a rotated grid (rotateGrid=.true.)
425    o pkg/exf: add capability to bypass interpolation for runoff
426      by setting yet another CPP-flag
427    o eesupp/src, B-grid exchange:
428      add simple (6 tiles, non MPI) CS exch + standard interface S/R.
429    o autodiff
430      new CPP option ALLOW_TAMC_SINGLEPREC_COMLEV
431      allows to switch to single-prec common blocks;
432      corresponding switch occurs in tamc.h, integer isbyte
433      TAF store directivs "byte" and "kind" seem equivalent;
434      Most tamc.h have been updated correspondingly.
435    
436    checkpoint61i
437    o autodiff:
438      fix autodiff_sore/_restore indices for obcs
439      (spotted by I. Hoteit, M. Mazloff)
440    o pkg/autodiff, pkg/ctrl:
441      Add flag to reduce all tapelev I/O to single-prec.
442      In data.ctrl set
443        doSinglePrecTapelev = .TRUE.
444    o model/src/ini_curvilinear_grid.F, new grid-file format without EXCH2:
445      check in hack for SX8 compiler (for dxV, dyU); remove it afterwards.
446    o pkg/shelfice: fix bug with SHELFICEconserve flag, prepare for
447      real fresh water flux (not yet)
448    o pkg/mdsio & rw:
449     - add argument & option to S/R MDS_WRITEVEC_LOC (avoid Open/Close & write-meta)
450     - add simple interface S/R to MDS_WRITEVEC_LOC in pkg/rw: WRITE_GLVEC_RX.
451    o pkg/flt:
452     - replace FLT_INIT by 3-steps standard initialization S/R: readparms,
453       init_fixed & ini_varia.
454     - clean-up & simplify linear interpolation S/R:
455       move flt_bilinear.F -> flt_interp_linear.F ; add arg. myThid.
456     - fix some indices (mainly vertical index) ; add IMPLICIT NONE.
457     - more efficient I/O, using new options of MDS_WRITEVEC_LOC S/R.
458     - add vert. coordinate & horiz. indices to output files.
459     - change vertical position in initial condition, from index to depth [m].
460     - store horizontal (decimal) indices i,j in common block (instead of coord. x,y)
461       (easier to get to a curvilinear grid) ; delX,delY no longer used.
462    o pkg/ggl90: a few modifications:
463     - fix bottom boundary condition, and interpolation of KappaE
464       near top and bottom
465     - use same set of viscosity/diffusivity for TKE/momnetum/tracer
466     - add smoothing option as in Blanke and Delecluse (1993) (--> ALLOW_GGL90_SMOOTH)
467     - add a few options for mixing-length upper limit (--> mxlMaxFlag)  
468    o rename thetaMin,phiMin -> xgOrigin,ygOrigin
469      (maintain temporary backward compatibility, until next checkpoint)
470    
471    checkpoint61h
472    o pkg/diagnostics with "periodic averaging diagnostics":
473      fix S/R DIAGNOSTICS_COUNT ; hack diagnostics_out.F to get NetCDF output.
474    o pkg/my82: add missing "_d 0" ; update output of exp. vermix.my82
475    o pkg/obcs: fix loop ranges for balancing code
476    o pkg/flt:
477     - improve criteria for finding which tile owns a float.
478     - fix FLT_EXCH for case without MPI ; apply cyclic BC + fix also the MPI case.
479    o Add well-mixed CO2 box in aim_v23 (which includes changes in pkg
480      aim_compon_interf, ocn_compon_interf, gchem, and dic to get coupling
481      with ocean biogeo)
482    o pkg/flt:
483     - do some cleaning and fix the restart ;
484     - add output.txt in flt_example/results to get this pkg tested.
485    o genmake2: add an EXTENDED_SRC option and flag.
486       for now, cannot be turned on on command line (only through genmake_local)
487    o pkg/mdsio: read/write vector:
488     - singleCpuIO: fix RL/RS in MDSWRITEVECTOR by calling new S/R MDS_BUFFERtoRL/RS
489     - singleCpuIO=F: fix arrType & filePrec & _BYTESWAPIO in both MDSREADVECTOR
490       & MDSWRITEVECTOR by calling new S/R MDS_RD/WR_VEC_RL/RS.
491     - affects gradient of test-exp "bottom_ctrl_5x5" (not due to _BYTESWAPIO)
492      (drop to 4 digits matching for grad). But this test does not look very
493      reliable (was already failling on eddy, fc5, at 6.digits). Update output.
494    
495    checkpoint61g
496    o pkg/flt:
497      - move FLT_CPPOPTIONS.h to FLT_OPTIONS.h (standard name)
498       + make OPTIONS file more standard.
499      - rename S/R MDSREADVECTOR_FLT to FLT_MDSREADVECTOR (to mach src file name)
500      - fix _BYTESWAPIO CPP-Flag
501      - standard reading of file-parameter "data.flt"
502      - fix argument list of S/R FLT_RESTART
503      still need to fix _BYTESWAPIO in pkg/mdsio/mdsio_writevector.F
504    o pkg/obcs: fix a CPP-flag, bug reported by Jeff Blundell
505    o gather_2d.F/scatter_2d.F: suppress vectorisation on NEC SX in respond to
506      a still unfixed compiler/optimization bug
507    
508    checkpoint61f
509    o pkg/seaice, LSR solver: fix bug in GLOBAL_MAX calls ;
510      update results of global_ocean.cs32x15.icedyn test.
511    o move getcon.F from model/src to pkg/fizhi.
512    o pkg/exf: add parameter for extrapolation of temp up to the surface
513       and option to prevent negative evap (in bulk_largeyeager04 only).
514    o Prather Advection scheme: fix tracer conservation for divergent flow
515      (e.g., when using NonLin Free-Surface).
516    o kpp: retire KPPmld diagnostics --> use MXLDEPTH instead
517    o gmredi (Visbeck-variable-K):
518     - add more parameters to Visbeck-variable-K.
519     - use a 5 points average for dSigmaR in Visbeck-K calculation
520       (more "homogenous": same stencil and same weights as in dSigmaH)
521     - update output of ideal_2D_oce experiment.
522    o fix CPP-flag REAL4_IS_SLOW, when _RS expands into real*4
523      (#undef REAL4_IS_SLOW)
524     - pkg/mnc/mnc_cw_cvars.F: write _RS-grid variable as netcdf-real*4
525       coordinate variable
526     - pkg/monitor/monitor.F: call mon_printstats_rs for _RS variables
527       (surface forcing fields), removes some of the functionality
528     - model/src/write_grid.F: write _RS variables as RS-netcdf variables
529     - model/src/diags_oceanic_surf_flux.F: fix a few diagnostics, but
530       probably not all: copy _RS surface flux fields to RL field before
531       calling DIAGNOSTICS_FILL
532     - model/inc/CPP_EEMACROS.h: make the _EXCH_*_RS macros expand into
533       real*4 (CALL EXCH_*_RS) versions.
534     - tested in 2 experiments: inverted_barometer & solid-body.cs-32x32x1
535       (generate new output).
536    
537    checkpoint61e
538    o gmredi (Visbeck-variable-K):
539      - fix the "OLD_VISBECK_CALC" option + move the #undef to GMREDI_OPTIONS.h
540      - change computation of Visbeck-K where Slope > Smax :        
541        now: N*min(Slope,Smax) (similar to OLD_VISBECK_CALC with gkw91 taperFct)
542        previously was: M*sqrt(min(Slope,Smax)) ; update ideal_2D_oce output.
543    o bottom-drag in P-coord.: change units of bottomDragLinear & bottomDragQuadratic
544      to be the same as with Z-coord. (i.e., m/s & no-units respectively).
545    o calc_viscosity: fix index range (was wrong for CD-Scheme & explicit Visc)
546    o pkg gmredi, linear & fm07 tapering: put an upper limit on Slope^2 so that Kwz
547      does not become too large (to avoid precision problems in implicit-diffusion
548      solver); update ideal_2D_oce output.
549    o pkg ggl90:
550      - in ggl90_cal.F: compute only one set of visc/diff, used to
551        step forward TKE/T/S/momentum
552      - default value of GGL90viscMax/GGL90diffMax larger and equal (to
553        have Prandlt =1)
554    o gmredi (fm07):
555      - add lower limit on Transition layer thickness + lower limit on 1/lambda
556      - allow to set few more params from data.gmredi
557    o pkg ggl90:
558          - add missing sqrt(2) factor in computation of mixing length
559            scale in ggl90_calc.F
560            (see Eq. (2.35) in Blanke and Delecluse, JPO, 1993)
561    
562    checkpoint61d
563    o adjoint modifs
564      - adapt to new field rhoInSitu
565      - allow to revert from StoreDynVars2D, StoreDynVars3D
566        to individual fields
567        (switches AUTODIFF_USE_OLDSTORE_2D, AUTODIFF_USE_OLDSTORE_3D)
568    o store 3-D (in-situ) density in commom block (DYNVARS.h)
569     - save 1 rho computation.
570     - no longer modify T & S inland when using down_slope pkg.
571    o gad_som : allow to switch to SOM advection for T & S without corresponding
572      pickup files (using new S/R: MDS_CHECK4FILE).
573    o keep removing _BEGIN/_END_MASTER between MDSIO S/R call
574      (for useSingleCpuIO to work in multi-threaded)
575    o pkg/shelfice:
576     - disentangle parameters: retire shelfIceFile in data/PARM05 and substitute
577       with SHELFICEtopoFile in data.shelfice
578     - move code for reading ice shelf topography and modifying hFacC into separate
579       subroutines of the shelfice package
580     - separate initialisation of "fixed" and "variable" variables
581     - kTopC is not (yet) replaced by kSurfC, although this is possible
582    o fix broken diagnostic SIatmFW and changed the units from m/s to kg/m^2/s
583    o add initialisation of deepFac if using Pcoords (new S/R set_grid_factors)
584      and rename:
585      ini_phiref.F          --> set_ref_state.F  (+ set anelastic factors)
586      ini_reference_state.F --> load_ref_files.F (- set anelastic factors)
587    o change FIND_RHO_SCALAR : return rho (instead of rho - rhoConst)
588    
589    checkpoint61c
590    o add option ALLOW_ADDFLUID and run-time selector "selectAddFluid"
591      to add mass source/sink of fluid in the interior (3-D generalisation
592      of oceanic real-fresh water flux).
593    o pkg/monitor: fix recip_dr argument in mon_advcflw2 call (-> advcfl_W_hf_max)
594    o vermix test experiment: switch from LINEAR EOS to MDJWF (not tested before)
595    o new pkg: down_slope
596      density-driven downsloping flow parameterisation (Tellus, 1999, 412-430).
597      - presently, modify T & S inland (dwnslp_calc_rho.F).
598        can be avoided if rho was stored in common bloc and used in calc_phi_hyd.
599      - implementation for ocean in P-coords not tested.
600      - add secondary test to global_ocean.90x40x15 (input.dwnslp) to check this pkg.
601    o move kSurfC,kSurfW & kSurfS from SURFACE.h to GRID.h (next to kLowC)
602      (to facilitate conversion of oceanic pkg to p-coordinate).
603    o change FIND_RHO to FIND_RHO_2D :
604      pass arguments tFld & sFld as local (tile) 2D-arrays ; +fix EOS_CHECK.
605    o new pkg: cheapaml
606    
607    checkpoint61b
608    o exch2:
609      change index bounds in rx2_cube exchanges (new S/R: EXCH2_GET_UV_BOUNDS)
610      - no longer depend on the order sequence (N,S,E,W).
611      - 3rd exchange no longer needed (tested with 24 tiles).
612      - same modif to hand-written adjoint S/R (global_ocean.cs32x15: zero diff)
613      - exch_UV_A-grid readily available (but not yet tested).
614      comment out 3rd exch call and remove copy of V to U at SE & NE face-corners
615      (both are no longer needed) in exch_uv: no effect in forward run; but
616       get truncation error differences with adjoint exch.
617    o exch2:
618     - change index-bounds storage (moved from target to local tile,
619       more intuitive this way) ; rename/remove some variables.
620     - change utils/exch2/matlab-topology-generator & code_mods accordingly.
621    
622    checkpoint61a
623    o exch2/matlab-topology-generator:
624      fix bug in index bounds for N-S internal exchange (hard to tell if this
625      had any effect on the solution).
626    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
627      is exceeded
628    o testreport: modify syntax of awk, so that it works also with
629      awk, and not only with nawk and gawk
630    
631    checkpoint61
632    o autodiff
633      Change default for TAF usage by removing argument '-nonew_arg'
634      This changes TAF subroutine argument list (ordering of active var.)
635      Omission of this flag leads to incompatibility w.r.t. TAMC
636      To restore TAMC-compatibility, need following modifs:
637      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
638      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
639      Tested TAF version is 1.9.22
640      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
641    
642    checkpoint60
643    --->>> This is the last checkpoint for which generating the adjoint
644    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
645    --->>> by default.
646    --->>> Future checkpoints will ommit this flag by default.
647    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
648    o pkg/grdchk: Add gradient check to etan0 perturbations.
649    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
650    o pkg/autodiff: more flexibility in zeroadj.
651      model/src: modifying do_oceanic_phys.F accordingly.
652    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
653    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
654      special setup of gmredi for which the adjoint is stable
655      enough for parameter optimization.
656    o bridging the gap between eddy stress and GM.
657      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
658          along with a change in CPP option (now ALLOW_EDDYPSI).
659      -> when using GM w/ GM_AdvForm:
660          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
661          is applied either in the tracer Eq. or in momentum Eq.
662          depending on data.gmredi (intro. GM_InMomAsStress).
663      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
664      The key modifications are in model/src/taueddy_external_forcing.F
665      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
666    
667    checkpoint59r
668    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
669      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
670      fix option to read coriolis(@ cell-corner) from files with CS-grid.
671    o pkg/mnc: add some attributes to standard 1D-coordinate variables
672    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
673      mass points, when using mnc for output
674      - add runtime parameter (missing_value, missing_value_int) to override
675        default (which is the value of getcon('UNDEF'))
676    o pkg/mnc: prepare mnc for the actual use of missing values with the
677      diagnostics package: small fix in mnc_cw_readwrite.template and more
678      initialisation of never used fields
679      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
680      versions
681    o pkg/thsice/thsice_ini_vars.F added default initial values so that
682      thermodynamics sea ice solver does not blow up when some initial fields
683      are missing.
684    o move from external_forcing_surf.F to ini_forcing.F
685      the p-coord. hack consisting in using pLoad to set phi0surf ;
686      update output of tutorial_global_oce_in_p (affected @ truncation level).
687    o Freshen up a bit hs94.1x64x5, notably:
688      remove rotationPeriod and tRef=5*0. (adjoint only), and add
689      exactConserv=.TRUE.
690    o pkg/generic_advdiff:
691      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
692      applies to files where Temperature & Salinity 2nd Order moments are used.
693    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
694      this uses a dynamically allocated internal state data structure
695      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
696      and requires a fortran 90 compiler
697    
698    checkpoint59q
699    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
700       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
701    o Refresh tutorial_global_oce_biogeo, notably:
702      - change bathymetry (put back seamounts in ACC, use hFacs)
703      - change EOS (POLY3 --> JMD95Z)
704      - use Bryan-Lewis vertical diffusivity
705      - use multidimensional advection
706      - remove old virtual virtual in dic pkg, now done through ptracer pkg
707      - change a couple of parameters in dic pkg
708    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
709    o pkg/obcs: change default to OBCSfixTopo = .true.,
710      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
711      - replace "debugMode" with "debugLevel .GE. debLevB"
712    o implementation of TAF directives for gchem,cfc,dic
713    o remove "exp5" (replaced by tutorial_deep_convection).
714    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
715      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
716      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
717      --> changes results in exp4, seaice_obcs
718    o tutorial_deep_convection :
719      update the set-up and increase resolution and domain size ; start
720      from pseudo initial conditions = output at t=120mn in order to see
721      something happening when running testreport.
722    o pkg/seaice: add os7mp as an advection scheme
723                  add check for advection schemes
724                  add a flag for restoring T and S underneath sea ice
725    o pkg/my82: add netcdf-support and diagnostics
726    o thsice pkg:
727      - Now hsMax limits snow height by turning it into ice following
728        flooding scheme (and now conserving energy)
729      - Slight rewriting of the formula in thsice_calc_thick.F
730      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
731      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
732    
733    checkpoint59p
734    o gchem / dic / cfc :
735      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
736      - add new parameter files: "data.dic" & "data.cfc" ;
737      - various re-arrangement in initialisation & header file ;
738      - fix tutorial_global_oce_biogeo for multi-threaded test.
739    o pkg/dic: test for "pickup_dic" file when restarting ;
740      if no pickup-file, can restart with a re-initialised pH (same as it did
741      before) providing pickupStrictlyMatch is set to False.
742    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
743      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
744    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
745      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
746    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
747     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
748       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
749    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
750       scheme to use for vorticty-term ;
751     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
752       (with default selectVortScheme, return to original discretisation)
753     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
754    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
755    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
756      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
757      also fix diagnostics VISCAHW & VISCA4W.
758    
759    checkpoint59o
760    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
761    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
762      move a few statemens out the main loop into separate loops
763    o pkg/shelfice:
764      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
765        (kg/m^2/s), does not break tests, because in verification/isomip,
766        rhoConstFresh=rhoConst (by accident)
767      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
768      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
769        new file model/src/seawater.F, so that they are available for all pkgs.
770      - convert potential temperature into in-situ temperature. This changes the
771        isomip tests => update tests
772    o add a flag writePickupAtEnd (default=true) to be able to suppress
773      writing a pickup at the last timestep
774    o tools/mpack-1.6 :
775      - disable automake (not working) and autoconf (not needed).
776      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
777        also cleaner with much less compilation warnings.
778    o pkg/profiles:
779      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
780      (for "less than 32 characters name" compiler requirement)
781    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
782      conditions that have a different sampling frequency than S/T/U/V obcs
783    o pkg/diagnostics (stats-diags):
784      - fix global Min/Max in case 1 processor get only empty tiles
785    o genmake2: replace (4 times)
786         make genmake_tc_1.o >> genmake_warnings 2>&1
787      with
788         COMM="$CC $CFLAGS -c genmake_tc_1.c"
789         echo $COMM >> genmake_warnings
790         $COMM >> genmake_warnings 2>&1
791      to make genmake2 always see the value of CC as specified in the optfile.
792    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
793      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
794      - modify verification advect_cs test to test SOM-advection on CS-grid.
795    o pkg/ctrl:
796      - Rewrite of ctrl_map_ini_ecco.F,
797        introducing a generic routine (ctrl_map_ini_gen.F).
798      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
799    
800    checkpoint59n
801    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
802      number in dedicate array "hdiag":
803      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
804        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
805      - many small changes (integer format) for large number of diagnostics
806      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
807        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
808    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
809      usingSphericalGrid, this allows to define the rotated grid coordinates
810      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
811      geographical coordinates according to the inverse of the rotation defined
812      by the Euler angles, so that Coriolis parameter and online-interpolation by
813      exf works with the geographical coordinates on XC/YC/XG/YG.
814      Naturally, this feature does not work with all packages, so some
815      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
816      profiles), because there the coordinates are assumed to be regular
817      spherical grid coordinates.
818    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
819      - introduce isopycnal diffusion coefficient control.
820    o tools/adjoint_options:
821      - additional control vector components.
822    o pkg/mnc: have mnc create marginally meaning full coordinate variables
823      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
824    o pkg/mypackage:
825      - add example of read/write pickup for state-var ;
826      - add entry points to the main code for state-vars diags & write-pickup.
827    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
828      transitions for useExfYearlyFields
829      - add new subroutine that determines the file to read from for
830        use*YearlyFields = .TRUE. and .FALSE.
831      - add a verification experiment to global_with_exf that tests
832        useExfYearlyFields with USE_EXF_INTERPOLATION defined
833    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
834      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
835      subroutines (which could be generated from a template, because they are
836      almost identical), for now they are included in obcs_prescribe_read.F for
837      simplicity
838    o pkg/exf:
839      - add a little more diagnostic to exf_interp_read (in analogy to
840        mds_read_field, can be turned off with debugLevel < debugLevA=1)
841      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
842        ugly but fast by unrolling short inner loops, inserting a unroll=8
843        directive in routine lagran, and splitting a loop and making do while the
844        outermost loop (the latter requires the intoduction of index arrays)
845    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
846    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
847      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
848    o verification/seaice_obcs: updated for restart test and latest options
849    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
850      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
851      for now this is only available for the C-grid code and also within
852      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
853    
854    checkpoint59m
855    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
856      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
857    o gad_som : fix flux output (& diagnostics) to have same units as other  
858      advection scheme fluxes (was previously multiplied by deltaT).  
859    o added verification/seaice_obcs both to test seaice open boundaries
860      and to provide an example matlab scrpt for generating them
861    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
862    o pkg/salt_plume: clean up salt_plume_frac.F to
863      remove redundancy in PlumeMethod 1 and 4
864    o pkg/kpp: added saltplume diagnostics
865    o pkg/obcs and pkg/seaice:
866      - do not set uice and vice to zero when OB*icefile are unspecified
867      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
868      - moved seaice tracer obcs after call to seaice_growth
869    o pkg/salt_plume: added various options for salt plume depth
870      criterion and for vertical distribution of the salt
871    
872    checkpoint59l
873    o pkg/ptracers: new version of ptracers pickup:
874      read meta file and write only fields which are needed to restart.
875      ( same logic as main pickup file ; also using pickupStrictlyMatch )
876    o pkg/seaice:
877      - add timescale for melting due to warm mixed layer as a means of
878        setting SEAICE_availHeatFrac more conveniently
879      - add a CPP-flag/runtime parameter check for flooding algorithm
880      - reformulated availHeat in seaice_growth.F to be independent of AREA
881    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
882      unit changes
883    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
884    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
885      SX vector computer.
886    o pkg/seaice:
887      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
888        seaice forcing fields can now be read only through pkg/exf
889      - removed some unused halos
890    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
891    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
892      or U/VICE from U/VWIND before computing U/VSTRESS
893    
894    checkpoint59k
895    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
896      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
897    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
898      all experiments pass when compile with un-initialised var. checking option.
899    o added pkg/salt_plume
900    o script to test restart (for now, in MITgcm_contrib/jmc_script)
901    o pkg/seaice: new read/write pickup version.
902      read meta file and write only fields which are needed to restart.
903      ( same logic as main pickup file ; also using pickupStrictlyMatch )
904    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
905    o lab_sea.hb87: modify the domain & update output.hb87.txt :
906      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
907      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
908      process. Fixed here by closing the domain at the Northern boundary.
909    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
910    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
911      a set of consecutive levels in/from a 3-D array.
912    o pkg/ptracers:
913      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
914      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
915    
916    checkpoint59j
917    o in pkgs: dic, obcs, offline, rbcs:
918      standard way to compute coeff. for time interpolation between 2 time reccords
919      which retains full precision (& make results less dependent on compiler).
920      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
921    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
922      packages instead of reading ice cover and wind speed separately
923    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
924     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
925      to allow to compile customized code before the update)
926    o cleaning-up:
927      - fix CPP instruction syntax in pkg/obcs
928      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
929        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
930      - fix some threads issue in IO parts.
931    o pkg/dic:
932      - add tons of "_d 0" (--> much better testreports !)
933       and then update outputs of tutorial_global_oce_biogeo
934    o pkg/mom_fluxform:
935      add a special version of momentum advection intended to conserve momentum
936      next to a bathymetry step or a coastline edge. (default = off = #undef)
937    o new read/write pickup version:
938      - for now, only implemented for main (mdsio) pickup file.
939      - write out only what is needed to restart; merge pickup_nh , pickup_ph
940        and main pickup together.
941      - read meta file; read only what is needed to restart; stop if a field
942        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
943        if it make sense (even if the restart is not perfect).
944      - if no meta file, assume that pickup to read corresponds exactly to
945        a pickup that would currently be written.
946      - read pickup written in the old format (until checkpoint59i) if it
947        recognizes an old meta file (no field-list).
948      - add a meta file in exp. which starts from a pickup: 2 cases:
949        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
950         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
951        b) a meta file describing the content of the associated pickup file
952         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
953    o pkg/mdsio & pkg/rw:
954      - new routine to read a meta file ; new set of routine to read
955        Multiple-fields file (with meta file).
956    o added open boundary conditions capability for seaice
957        HSNOW, HSALT, UICE, and VICE
958    
959    checkpoint59i
960    o adjoint:
961      * fix multiDimAdvection adjoint
962        (partial recomputation problem by TAF for fVerT(:,:,kDown)
963        and comlev1 size definition (maxpass vs. max. number of tracers)
964      * verification/global_ocean.90x45x15 adjoint now tests
965        NLFS and multiDimAdvection using DST3 (=30)
966      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
967    o pkg/kpp: add "_d 0" to real constant (if missing);
968      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
969      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
970    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
971      for internal parameters related to restart process (formerly from PARAMS.h)
972      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
973    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
974      as argument. (only atm2d & obcs write_pickup have not yet been updated)
975    o pkg/monitor:
976      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
977      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
978      - account for deep Atmosphere factor and density factor (anelastic)
979    o added open boundary conditions capability for seaice HEFF and AREA
980    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
981      thermodynamics
982      - requires a little reorganization, which affects the testreport results
983        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
984        so that now the conservative form is tested
985      - add a few comments
986    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
987    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
988    o add new diagnostics to seaice: advective, diffusive fluxes (only for
989      multidim-advection, for scheme 2 they are not filled) and transports,
990      thermodynamic growth rates
991    o change units of EmPmR (inside the code, + within coupling interface)
992      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
993      Affects results @ truncation level (cg2d match) and update output of
994       experiments: lab_sea(6), global_ocean.90x40x15(10),
995      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
996      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
997      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
998      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
999    
1000    checkpoint59h
1001    o pkg/exf:
1002      - improve vectorization by moving if-statement out of loops in
1003        exf_mapfields, exf_radiation
1004      - exf_bulkformulae.F: introduce 2D fields and vectorize code
1005    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
1006    o testreport:
1007      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
1008        monitor & update offline_exf_seaice exp. output.
1009      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
1010    o pkg/seaice:
1011      - bug fix in the evp solver: boundary conditions were affected be
1012        masking of zMax/zMin (changes results)
1013      - minor bug fix in boundary conditions in seaice_calc_strainrates
1014        (changes results for no_slip)
1015      - seaice_lsr.F: make interpolation of eta dependent on boundaries
1016      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
1017      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
1018        stress formulation and no-slip boundary conditions
1019    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
1020      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
1021    o pkg/seaice: a first HSALT time stepping equation has been checked in
1022    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
1023      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
1024      without requiring DO-IF statements
1025    o pkg/thsice:
1026      use continuous power-law function for partition of energy between lateral
1027      melting/freezing and thinning/thickening ; old code using step function
1028      still available with #undef THSICE_FRACEN_POWERLAW
1029      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
1030    o testreport: change AD testing : check against results/output_adm.txt
1031      using same scripts as for forward test.
1032    
1033    checkpoint59g
1034    o adjoint testing: in preparation for changing testreport:
1035      - output format: cost and grad written on separated lines
1036      - ad output results in directory "results" (instead of "results_ad")
1037    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
1038    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
1039    o pkg/ecco: allow user defined cost function contributions
1040    o testreport:
1041      Allow to choose (per experiment) the list of tested output variables
1042       and the main variable (used to issue a pass/FAIL ) ;
1043      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
1044      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
1045      Also modify printing of summary:
1046       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
1047       b) echo the list of tested variables in the individual summary.txt of
1048          each experiment.
1049    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
1050      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
1051      (but still depend on the tile decompostion of the domain).
1052    o pkg/seaice: change a discretization detail to make the B-grid code
1053      "more symmetric". This change is likely to remove all "ridges/leads" that
1054      where quasi-aligned with the grid in B-grid solutions. It may also be
1055      the solution to the stress coupling issues with the B-grid.
1056    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
1057      remove .cvsignore from input dir. (since testreport no longer run here).
1058    o pkg/thsice:
1059     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
1060     - fix reshaping of sea-ice just after advection:
1061       melt all the ice only if ice-volume is too small.
1062     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
1063       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
1064     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
1065    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
1066      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
1067    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
1068      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
1069      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
1070      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
1071      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
1072      -> update output.txt
1073    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
1074     this affects truncation error: -> update output.txt of exp:
1075      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
1076      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
1077    
1078    checkpoint59f
1079    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
1080    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
1081      a bounded range (in forward mode)
1082    o pkg/ecco, ctrl, autodiff and mom_common:
1083     internal parameter controls, completements of implementations
1084    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
1085    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
1086      (not seem any difference in testing results).
1087    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
1088       at face corners.
1089    o pkg/generic_advdiff:
1090     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
1091      loop range indices for computing vertical advection tendency
1092      and do the calculation in the interior only (no overlap) ;
1093      for now, only implemented for SOM advection (to save CPU time).
1094     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
1095    o exch2 adjoint
1096      First set of changes:
1097      - add exch2 hand-written adjoint templates
1098      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
1099        This will require cleanup in pkg/autodiff/*.F
1100        (changed routines currently kept separate in verif. code/)
1101      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
1102        that used to hide exch2 or cubed-sphere specific code
1103        (commented via 'cph-exch2')
1104    o pkg/seaice
1105      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
1106    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
1107       output of global_ocean.cs32x15.thsice .
1108    
1109    checkpoint59e
1110    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
1111      for B-grid vector (not yet tested) and C-grid vector (<- only used
1112      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
1113    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
1114      (#ifdef ALLOW_SALT_PLUME)
1115    o gather_2d/scatter_2d: removed halo regions
1116    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
1117      scheme and the corresponding test case (under front_relax dir). For now,
1118      only available with Skew-flux form and not yet tested in realistic set-up.
1119      adjoint: store directives updated, but gradient checks deteriorated,
1120      so maybe GM/Redi adjoint is now broken.
1121    o seaice adjoint
1122      * add AREA, HEFF, HSNOW as control variable
1123        (should not change lab_sea results)
1124      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
1125    o pkg/seaice:
1126      * added computation of saltFlux in seaice_growth;
1127        For time being, sea ice salinity is assumed constant
1128        contribution of snow flooding to freshening of sea ice is neglected.
1129        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
1130        defaults to 0.0 in order to maintain backward compatibility.
1131        Typical values for SEAICE_salinity are 4 to 10 g/kg.
1132      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
1133      * added SEAICE_availHeatFrac, which specifies fraction of surface level
1134        heat content used to melt or grow ice
1135      * commented out cap of HICE: it helps keep ice thinner
1136      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
1137      * applied OBCS T/S mask to HEFFM sea ice mask
1138    
1139    checkpoint59d
1140    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
1141     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
1142     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
1143    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
1144     and change default value of parameter "GM_Small_Number";
1145     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
1146       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
1147       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
1148    o pkg/ecco: cost function when applying pkg/smooth to controls
1149    o pkg/ctrl: add forcingPrecond run time parameter
1150    o pkg/seaice:
1151     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
1152     - fix bug in metric terms of u-equation in LSR solver (implicit part),
1153       changes verification/lab_sea
1154     - rearrange implicit part of u-equation in LSR solver to make it easier to
1155       read, understand, and debug. This causes changes at the truncation level.
1156     - fix (serious) bug in the boundary conditions (sign error in the implicit
1157       part) of the LSR solver. Changes all LSR results.
1158     - fixed problem with HSNOW initialization to avoid thick snow when AREA
1159       is initilized with small values - does not change lab_sea results.
1160     - added HsnowFile initialization capability
1161    o pkg/smooth: addition to model/src and pkg/ctrl so allow
1162     initialization of pkg/smooth and application to control vector
1163    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
1164    o dependencies: pkg/profiles requires pkg/cal
1165    o pkg/profiles:
1166     - added option ALLOW_PROFILES_GENERICGRID
1167         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
1168         that interpolation information (grid points and coefficients) is provided
1169         within the netcdf input files.
1170         -> sample matlab scripts can be found in MITgcm_contrib/gael
1171         that allow you to prepare netcdf input files.
1172     - also modified: cleaner include statements, cleaner error print statements,
1173       cleaner stops when error, and more tests of the netcdf input files consistency.
1174    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
1175    o pkg/seaice:
1176     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
1177       requires a new routine: seaice_diagnostics_fill.F
1178     - make sure that seaice does not move if not forced (pressure replacement
1179       method, Hibler and Ip, 1995), changes results
1180     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
1181     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
1182       It is turned off by default (=-1.), because it changes the results.
1183     - make it possible to read AREA from a file, too.
1184    
1185    checkpoint59c
1186    o add S/R and diagnostics for oceanic mixed-layer depth
1187    o move GMRedi call after all vertical mixing schemes (including KPP)
1188    o pkg/thsice:
1189     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
1190      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
1191    o pkg/obcs:
1192     - bug fix for balance code
1193    o pkg/seaice:
1194      - allow values of SEAICE_elasticParm > 1
1195      - add new parameter SEAICE_evpTauRelax as an alternative
1196        to SEAICE_elasticParm
1197      - make lsr boundary conditions free slip (by default), changes result
1198      - add code for no slip boundary conditions for lsr
1199      - set minimum of zeta to zero (and not 4e8) (changes results)
1200      - add a cap on AREA after advecting AREA if seaice_growth is not called
1201    o change calculation of Visbeck K:
1202      - no longer depend on tapering scheme; instead, compute slope (limited
1203        by GM_maxSlope). this is equivalent to what was comuted before with
1204        clipping or linear tappering.
1205      - fix vertical averaging (wrong by 1/2 level)
1206      - leave the old version (but will not be maintained) within
1207        #ifdef OLD_VISBECK_CALC / #endif
1208      - update output of exp. ideal_2D_oce
1209    o change error catch in calc_r_star to improve vectorization
1210    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
1211      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
1212    o adjoint:
1213      Re-organized adjoint checkpointing according to Matt Mazloff
1214      (but with modifs/completions/cleanups)
1215      Storing is now bundled into large arrays to optimized I/O
1216      (and second step in cleanup of the_main_loop)
1217    
1218    checkpoint59b
1219    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
1220      - export/import (between ocean & coupler) fields needed for ocean DIC.
1221    o pkg/seaice:
1222      - get rid of three more exchanges seaice_calc_viscosities (required
1223        different loop boundaries in seaice_lsr and seaice_ocean_stress)
1224      - bug fix in seaice_ocean_stress (update of lab_sea required)
1225      - reduce loop boundaries to necessary minimum also in seaice_evp
1226      - go back to the old way of computing deltaC/Z as the adjoint likes that
1227        better
1228    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
1229      passive tracer to an Age Tracer) + update output.txt
1230    o pkg/exf:
1231      - implement A-grid / C-grid selection for wind-stress input files.
1232      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
1233      for now, in exf_bulk_largeyeager04.F only :
1234      - change implementation for case where windspeed + 2. components wind-stress
1235        are read-in. AND use rhoConstFresh to convert evap.
1236    o pkg/seaice:
1237      - use correct EXCH_UV for wind-forcing (on A-grid).
1238      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
1239        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
1240    o pkg/exf:
1241      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
1242      EXF_INTERPOLATION:
1243      - merge global_with_exf/code version of exf_interp_read.F
1244        to the main code ;
1245      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
1246        reading the file ; Important: This options needs to be defined to recover
1247        previous code.
1248        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
1249      - no longer loose real*8 precision along the way when using exf_iprec=64.
1250    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
1251      - change discretisation of evp-solver in order to avoid another exchange
1252        (changes lab_sea) and clean up a little
1253      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
1254        help the adjoint (this also changes the results slightly)
1255      - add a few "_d 0" where they had been missing in seaice_evp.F
1256      - cleaning up: remove unused seaice_calc_rhs.F
1257    o pkg/exf: some cleaning-up:
1258      - change various "constants" into runtime parameters
1259      - cleaned-up Large&Yeager04 routine which should eventually
1260        replace exf_bulkformulae.F (changed names of S/R and CPP)
1261        and merged various ALLOW_ATM_WIND options
1262     only used with thsice pkg (in thsice_get_exf.F):
1263      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
1264        which are used when useStabilityFct_overIce=TRUE (= the default)
1265      - change default values of ice & snow emissivity and scale downward LW
1266        by ice & snow emissivity.
1267    o pkg/thsice:
1268     fix few little problems, in thsice_calc_thickn.F:
1269      - growth vertically (and not laterally) if iceFrac == iceMaskMax
1270      - melt only laterally if hIce < hThinIce (as the comments say)
1271      and in thsice_extend.F:
1272      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
1273      - start to form ice as soon as the minimum ice-volume is reachable.
1274     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
1275      and cpl_aim+ocn
1276    o pkg/kpp
1277     - move computation of surface related input fields to KPP into a new
1278       subroutine kpp_forcing_surf.F
1279     - remove wrong (within bi,bj loops) EXCH calls.
1280     - little cleaning (add argument myThid in last position, cvs header ...)
1281     - for now, fix conservation problem by exchanging KPPviscAz (may not
1282       be the best fix)
1283    o pkg/seaice
1284     - check for inconsistent evp parameter/cpp-flag combination
1285     - remove leftover errIO flat for obsolete name list error handling
1286    o OpenAD
1287     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
1288    
1289    checkpoint59a
1290    o pkg/seaice: some parameter clarifications and a little bit of clean up
1291    o pkg/thsice: rename run-time parameters:
1292       himin       -> hIceMin
1293       himin0      -> hThinIce
1294       hihig       -> hThickIce
1295       i0          -> i0swFrac
1296       transCoef   -> bMeltCoef
1297       frac_energy -> fracMelting
1298      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
1299       with default values (for now) that do not change the results.
1300      remove old version of thsice vars advection in pkg/seaice.
1301    o in FFIELDS.h:
1302      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
1303      - make pLoad & sIceLoad always available (but still only used if
1304         ATMOSPHERIC_LOADING is #define).
1305    o pkg/kpp: replaced _KPP_RL with _RL
1306    o bug fixes for vertical diffusivity computations when both KPP and
1307        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
1308        are no longer updating the vertical diffusivity array
1309        (passed as argument) but are (re-) setting those arrays.
1310    o pkg/seaice: fix bug in evp solver, while doing that
1311      - change (improve?) discretization of stress computations for both
1312        cgrid-lsr and evp solver
1313      - add a new routine to compute strain rates
1314      - the above changes lab_sea results
1315      - add no slip conditions for evp solver (off by default), lsr-version
1316        may follow
1317      - fix exchange for shear at Z-points (does not change lab_sea)
1318      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
1319        (to force the user to pick a time step since there is not "safe" way
1320        of choosing it)
1321      - add principal stress diagnostics
1322      - rearrange fields for evp a little to avoid having to call a: too many
1323        exchanges and b: exchanges for stress trensor components which we do
1324        not have.
1325      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
1326        of evp, complete rewrite for lsr case (latter is does not yet work
1327        in all cases)
1328    o pkg/kpp: add code to have mixing in shelf ice caverns
1329      - add myThid to all kpp routines (long overdue)
1330    
1331    checkpoint59
1332    o pkg/exf:
1333      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
1334        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
1335      - move exf header files from lower_case.h to UPPER_CASE.h ;
1336        add missing cvs Header & Name
1337      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
1338      - add namelist param. selectStressGridPosition, exf_monFreq
1339      - retire many _CLIM routines, and remove data.exf_clim
1340        + params moved to data.exf
1341        + climsst, climsss now handled by exf_set_gen, i.e.
1342          climss?period=0 refers to constant field,
1343          climss?period=-12 to monthly forcing
1344      - split up namelists in data.exf
1345    o pkg/seaice:
1346      - remove seaice_exch and seaice_exch_uv
1347      - remove superfluous exchange of theta
1348      - add myThid to seaice_budget_ocean/ice
1349      - add new interface for atmospheric wind forcing (C-grid only)
1350        + new routine
1351        + two new field (taux, tauy for stress over ice)
1352        + removed one global field (DAIRN) for C-grid case only
1353    o pkg/thsise
1354      - 2nd set of modifs for thsice adjoint in conjunction with exf
1355    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
1356    
1357    checkpoint58y_post
1358    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
1359      vertical diffusivity, similar to that in MOM4; turned on using
1360      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
1361      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
1362    o Added capability for 3D specification of background vertical diffusion
1363      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
1364      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
1365      "data" file that contains the 3D vertical diffusivity coefficients.
1366    o ice dynamics (pkg/seaice) with thsice thermodynamics:
1367      - add code within pkg thsice to advect & diffuse sea-ice fields
1368      similar to (and will replace) what has been added in  seaice_advdiff.F,
1369      but: - conserving Mass, Heat & Salt.
1370           - better when using non-linear advection scheme (not yet fully tested)
1371           - can also be used in atmospheric set-up (for now, only the diffusion).
1372    
1373    checkpoint58x_post
1374    o IO option for global-file compact format:
1375      - add options when generating topology (utils/exch2/matlab-topology-generator)
1376      - add I/O capability (pkg/mdsio).
1377      - adapt utils/matlab/rdmds.m to read this format.
1378      for now long-line format not yet supported by pkg/mdsio (& exch2).
1379    o shelfice: add a few diagnostics
1380    
1381    checkpoint58w_post
1382    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
1383      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
1384      (and replace horiVertRatio in NH code).
1385      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
1386                         and tutorial_plume_on_slope (sensitive to truncation)
1387    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
1388      directly to drive seaice model (C-grid only)
1389    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
1390     - reintroduce computation of wind from stress,
1391     - compute tau (in exf_bulkformulae.F) from windstress averaged to
1392       mass points to avoid tau = 0
1393     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
1394    o rdmnc.m: make it work with "global" files created with gluemnc
1395    o rdmnc.m : some improvements in dealing with singleton dimension
1396      (tested on all testreport mnc output files).
1397    o genmake2: disable pkg/profiles if netcdf test fails.
1398    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
1399    o move call to cal_readparms up to make calendar parameters/variable available
1400      to all packages
1401    
1402    checkpoint58v_post
1403    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
1404      useDynP_inEos_Zc tested.
1405    o pkg/exf: changes to properly interpolate/mask/scale initial fields
1406    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
1407      and portions thereof.  See read_cs.txt for description and examples.
1408    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
1409      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
1410      following the great-circle arc between those 2 points.
1411    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
1412      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
1413    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
1414     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
1415     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
1416     - still needs work (not working with some options ; efficiency to improve)
1417       and serious testing.
1418     - use this scheme for temperature & salinity in 2 advection test exp.:
1419       advect_xy & advect_xz, respectively.
1420    
1421    checkpoint58u_post
1422    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
1423    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
1424    o testreport: add option "-skipdir" to skip some test.
1425    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
1426      momentum calculation.
1427    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
1428    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
1429      remove checkpoint.F and the_correction_step.F (no longer used);
1430      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
1431    o add option (linFSConserveTr) to correct for tracer source/sink due to
1432      Linear Free surface
1433    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
1434    o pkg/thsice: fix reading mnc-pickups
1435    
1436    checkpoint58t_post
1437    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
1438    o pkg/mdsio:
1439     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
1440       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
1441       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
1442     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
1443     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
1444       either MDS_READ_FIELD or MDS_WRITE_FIELD )
1445     - new S/R (to replace MDSWRITEMETA), which allows to write more
1446       informations (variable names, time ...) to meta files.
1447     - modify rdmds.m to give back the meta file content.
1448    o pkg/diagnostics: change vertical interpolation to be safer, and more
1449       flexible (define p-levels to interpolate to in data.diagnostics);
1450      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
1451       diagnostic pointer.
1452    o pkg/seaice: more cleaning up of seaice_growth, added many comments
1453    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
1454    o fix multi-category seaice:
1455     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
1456       SEAICE_MULTICATEGORY
1457     - fix short wave heat flux
1458    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
1459       and allow to use EVP solver. Change forward lab_sea: test both EVP
1460       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
1461    o Initial check-in of lab_sea adjoint
1462      (very similar to natl_box_adjoint/code_seaice)
1463      * used C-grid and EVP solver
1464      * used KPP, GM/Redi
1465      * uses inAdExact=.TRUE.
1466      * gradient checks fail for both ADM and TLM
1467        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
1468        f.d. gradients actually seem more problematic than ADM, TLM gradients;
1469        issue is related to forward mismatch between g77 an ifort
1470    o pkg/seaice: overhaul of thermodynamics
1471     - growth.F and groatb.F are replaced by new routine seaice_growth.F
1472     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
1473     - move a few global fields out of SEAICE.h into seaice_growth.F and
1474       make them 2D (FICE/QNETO/ ...)
1475     - remove FO (it is the same as QNETO)
1476     - introduce a few local fields to avoid modifying external fields such
1477       as atemp, etc.
1478    
1479    checkpoint58s_post
1480    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
1481      changed exf_set_gen.F so that
1482        genperiod=0 means input file is one time-constant field and
1483        genperiod=-12 means input file contains 12 monthly means
1484    o CG2D: use pre-computed solver main-diagonal (stored in common block);
1485      this affects truncation error ; generate new output file for exp. which
1486      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
1487        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
1488        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
1489        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
1490        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
1491        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
1492    o start implementation of deep-atmosphere and anelastic formulation
1493    o verification: remove 2nd copy of input files and use script "prepare_run"
1494      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
1495    o mom_common/vecinv/fluxform: fix a few initialisation isssues
1496    o profiles: fix for multithreaded case
1497    
1498    o diagnostics: rename few diags:
1499      s/'PRESSURE'/'RCENTER '/g
1500      s/'TICE    '/'oceFreez'/g
1501      s/'TAUX    '/'oceTAUX '/g
1502      s/'TAUY    '/'oceTAUY '/g
1503      s/'SWFLUX  '/'oceQsw  '/g
1504      s/DIFx/DFxE/g
1505      s/DIFy/DFyE/g
1506      and add few ocean-forcing diagnostics:
1507      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
1508    o modifications to pkg/seaice/growth.F and budget.F, which change results of
1509      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
1510      as actual snow thickness.  It now refers everywhere to effective snow
1511      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
1512    
1513    checkpoint58r_post
1514    o modifications to pkg/seaice/growth.F, which change results of
1515      lab_sea experiment: fixes pertain to melting snow over open water, to
1516      masking EVAP under sea ice, and to using the correct AREA variable for
1517      computations of EVAP, PRECIP, HSNOW, and GHEFF
1518    o add ability to read bathy, salt, and theta using MNC (off by def)
1519    o add flooding algorithm and advection of HSNOW for pkg/seaice;
1520      both are turned off by default and do no change any results
1521    o seaice advection with pkg/thsice: a step toward the use of non-linear
1522      advection scheme, but #ifdef or commented out for now (requires more EXCH).
1523    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
1524      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
1525      in natl_box (affects results @ truncation level: update output.txt)
1526    o multi-threading and IO:
1527      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
1528      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
1529        (needed to work with SingleCpuIO): tested in all verif. exp.
1530    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
1531      affects the results (but none of the verification test uses this scheme).
1532    o Adding some pkg/diagnostics capability to pkg/seaice
1533      (will certainly be subject to changes)
1534    o ctrl: adding new control variables:
1535      lwflux, lwdown, evap, snowprecip, apressure, runoff
1536    
1537    checkpoint58q_post
1538    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
1539      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
1540      high_res_cube configuration by 4% on Columbia.
1541    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
1542      add (in global_with_exf/code) a version of EXF_INTERP_READ without
1543      dynamical allocation (seems to work in multi-threaded).
1544    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
1545      single CPU io) so that TAF does not have to see EESUPPORT.h
1546    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
1547    
1548    checkpoint58p_post
1549    o obcs: stop if obcs is used with useCDscheme = .true.
1550    o shelfice:
1551     - fix a sign error so that no slip at shelfice interface works
1552     - remove stop for combination non-hydrostatic code and shelfice. That does
1553       not mean, that the results are correct, but at least they are numerically
1554       stable
1555    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
1556    o added adjoint exch routined for all exch*3d* routines
1557      and updated flow directives
1558    
1559    checkpoint58o_post
1560    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
1561      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
1562    o change controling S/R for writing pickup file (new S/R do_write_pickup)
1563      and clean-up reading/writing of pickup files.
1564    o fix local version of read/write pickup (NH part) in rotating_tank/code
1565    o simplify EXCH interface:
1566     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
1567     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
1568    o added the regrid package
1569    o shelfice:
1570     - add a simple boundary layer scheme to reduce noise
1571     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
1572    
1573    checkpoint58n_post
1574    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
1575       local variable (not in common block).
1576    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
1577      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
1578      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
1579        to work with SingleCpuIO.
1580    o add "_d 0" to real constant of pkg/cfc subroutines ;
1581       update exp. cfc_exemple & tutorial_cfc_offline output files.
1582    o multi-threading and IO:
1583      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
1584        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
1585      - barrier before and after reading.
1586      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
1587      - avoid using MDS_WRITELOCAL for LAND pkg output.
1588      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
1589        common-block variables ; Allows multi-threading with master-thread IO.
1590    o change default MAX_NO_THREADS from 32 to 4 ;
1591      and stop cleanly when MAX_NO_THREADS is too small.
1592    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
1593    
1594    checkpoint58m_post
1595    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
1596       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
1597    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
1598       keep global_ocean.90x40x15 (for AD testing) with former secondary test
1599       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
1600    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
1601        add MITgcm_tutorials (= code + all the tutorials)
1602    o ecco, option to compute cost for total ssh (mean+anom)
1603    o consistent with addition of ptracer and ssh in pkg/profiles
1604    o profiles: adding ptracer and ssh
1605    o testreport: change multi-test output-file name
1606      (from output.txt.{name} to output.{name}.txt)
1607    o profiles: now ok for mutli-tiles case
1608    o seaice: add 4 parameters for different advection schemes for area,
1609      (effective) seaice thickness, enthalphy, and snow height. Their default
1610      is the standard parameter SEAICEadvScheme
1611    o calc_gw:
1612     - add cosFacU in zonal viscous flux (harmonic.visc.).
1613     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
1614       of tutorial_plume_on_slope.
1615    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
1616    o calc_gw: true flux-form, account for horizontal grid spacing.
1617      update rotating_tank results, but not plume_on_slope (affected at
1618      truncation level, 11 digits).
1619    
1620    checkpoint58l_post
1621    o calc_gw:
1622     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
1623     - remove side-drag for now (need to fix it); update plume_on_slope results.
1624     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
1625    o commit code to make SST/SSS weights spatially variable
1626      (based on either variable in-situ or variable initial T/S weights)
1627    o pkg/ecco:
1628      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
1629        now based on horizontally varying weights wthetaLev, wsaltLev
1630      * cost_averagesflags now returns year indices in addition to day, month
1631      * sflux balance is performed on annual basis
1632        (sflxumm, sfluxmm2, bal_sfluxmm)
1633      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
1634        including separate counting and multipliers
1635    o pkg/rbcs
1636      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
1637    
1638    checkpoint58k_post
1639    o testreport:
1640     - always build in dir. "build" (if not there, mkdir build instead of building
1641       & running in input)
1642     - run in dir run (if it exists), in build otherwise.
1643     - call prepare_run (if input/prepare_run exists)
1644     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
1645    o pkg/exf modifications to interpolation and rotation routines for more
1646       reasonable treatment of North Pole singularity: for tracers North Pole
1647       value is set to northernmost zonal-mean value, for zonal velocity it is
1648       set to zero, and for meridional velocity it is set to northernmost value.
1649    o pkg/exf/exf_check_range.F
1650     - add tile index to diagnostics and move stop statement to the very
1651       end of the routine.
1652    o pkg/diagnostics: (diagnostics_main_init.F)
1653      define title of isomorphic variables according to the current config.
1654    o pkg/thsice with pkg/seaice dynamics:
1655    - fix domain of computation (interior only, required for exf) and do exchanges
1656    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
1657    o towards a standard way of dealing with multi-threading in MONITOR
1658      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
1659    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
1660       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
1661    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
1662    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
1663    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
1664       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
1665    o tracer advection:
1666     - clean-up and simplify calc_common_factors.F
1667     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
1668       advection subroutine (but still not used within DST advection S/R)
1669    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
1670    
1671    checkpoint58j_post
1672    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
1673      from file (collects calls previously in FORWARD_STEP)
1674    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
1675    o adjoint store dir. adjusted accordingly
1676    o genmake2
1677      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
1678    
1679    checkpoint58i_post
1680    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
1681      on wind stress (SEAICEstressFactor defaults to 1.)
1682    o Total number of Timers is finite (<=40): comment out 2 non-essential one
1683      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
1684    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
1685      on CS-grid: no longer loosing mass.
1686    o exf & curvilinear-grid: no longer modify longitude xC & xG.
1687    o pkg/ggl90: fix sloppy output and fix a bug
1688    o pkg/seaice: added SEAICEuseEVPpickup parameter
1689      - Set to false in order to start EVP solver with
1690        non-EVP pickup files when using SEAICEuseEVP
1691      - fix sign error in diffusion in seaice_calc_rhs
1692    
1693    checkpoint58h_post
1694    * Modifications for bottom topography control
1695      o replace hFacC by _hFacC at various places
1696      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
1697      o add non-self-adjoint cg2d_nsa
1698      o update autodiff support routines
1699      o re-initialise hfac after ctrl_depth_ini
1700      o works for 5x5 box, doesnt work for global_ocean.90x40x15
1701    * Adding verification for 5x5 box (4-layer) bottom topography control
1702    
1703    checkpoint58g_post
1704    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
1705       used for mean seasonal cycle, mean diurnal cycle); add an example
1706       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
1707    o pkg/ggl90:
1708      - add parameter (minimum surface kinetic energy)
1709      - fix bug (avoiding division by zero)
1710    o couple pkg/thsice to pkg/seaice:
1711      - modify advection in seaice to accomodate new scalar fields to be advected
1712      - only muliDimAdection scheme work with seaice/thsice
1713      - mapping of thsice-variables to seaice-variables, back and forth
1714      - does not break the verification experiments, but does not give the
1715        desired results either
1716    o pkg/seaice
1717      - make (default) second order advection a bit less confusing?
1718    
1719    checkpoint58f_post
1720    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
1721      to pkg/seaice):
1722      - new routines thsice_map_exf and thsice_get_exf provide the interface
1723      - add an additional formal parameter to thsice_solve4temp
1724    o pkg/exf:
1725      - add new fields wspeed, snowprecip (to be able to couple to thsice)
1726      - correct Stefan-Boltzmann constant
1727      - new parameter for longwave surface emittance
1728      - separate some stuff from exf_bulkformulae into new routines  
1729        exf_radiation, exf_wind
1730      - add new parameters and constants: longwave emissivity for ocean, ice
1731        and snow, evaporation parameters over ice
1732      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
1733        either wind from stress or stress from wind
1734    o pkg/thSIce:
1735    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
1736    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
1737       and THSICE_CALC_THICKN
1738    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
1739    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
1740      to make debugging easier.
1741    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
1742    o pkg/bulk_force:
1743      - clean-up comments and parameters ;
1744      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
1745    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
1746      generate new output for test-experiment: aim.5l_cs.thSI
1747    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
1748      testreport accordingly
1749    
1750    checkpoint58e_post
1751    o SEAICE_CGRID adjoint done
1752    o R_STAR adjoint implemented.
1753      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1754      * need to sort out init. of h0facc, etc.
1755    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1756      to be able to use it in pure forward.
1757    
1758    checkpoint58d_post
1759    o upgrade simple test-experiment to tutorial example:
1760     step.1: duplicate the experiment and (step.2) will remove the old copy.
1761      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1762      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1763      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1764      tutorial_global_oce_biogeo    <- copy of dic_example
1765      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1766      tutorial_plume_on_slope       <- copy of plume_on_slope
1767      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1768      tutorial_global_oce_optim     <- empty for now (David ?)
1769      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1770     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1771    o correct a sign problem in cost_scat.F
1772    o obcs and ptracers: fix boundary conditions for advections schemes
1773      with larger stencil
1774    o thsice adjoint: start
1775    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1776      completeness
1777    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1778      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1779    o ptracers adjoint:
1780      * avoid extensive recomputatations
1781      * fix missing re-init. of gptr (missed by TAF)
1782    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1783      me to turn off the excessive output to STDOUT that this package produces
1784    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1785      and add those terms in Vector-Invariant formulation.
1786    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1787      if the control period (xx_hfluxperiod etc) is 0
1788    o in profiles pkg, clean routines and fix details
1789    o in ecco pkg, reading ssh data:
1790      fix problem in case the model does not start at iter0=0
1791    o fix mnc-pickup/restart for ptracers
1792    o new package prifiles:
1793      code to compute profile-based cost by Gael Forget
1794      (modifs in ecco, ctrl, autodiff)
1795    o Benign bug fix in initialization (spotted by M. Mazloff) of
1796      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1797    
1798    checkpoint58c_post
1799    o adjoint: finish NLFS adjoint and provide reference output in
1800      verification/global_ocean.90x40x15/results_ad_nlfs
1801    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1802      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1803      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1804      with SEAICE_CGRID defined.
1805    o move calendarDumps from "data" to "data.cal" and clean-up the code
1806      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1807    o add useEXF & useCAL flags (for now, set in hard-coded way)
1808    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1809      (were missing in NH mode, and wrong in quasihydrostatic mode).
1810      waiting for Chris updated version of calc_gw to add those CALLs.
1811    o fix bug in quasihydrostatic S/R ;
1812      add a test for this option: global_ocean.90x40x15.qshyd
1813    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1814      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1815    o add on/off flag useOffLine for package OFFLINE
1816    o seaice:
1817      - modify advection so that it works also on the C-grid
1818      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1819        problem in multi-tile runs with C-grid
1820      - add flags for clipping ice velocities and/or masking solver forcing
1821      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1822        C-grid solver
1823      - added a few comments to seaice_diffusion.F
1824      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1825        are now exclusive)
1826      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1827        required re-ordering the code a little:
1828       + make DAIRN global variable (defined in SEAICE)
1829       + move computation of the viscosities eta and zeta into a new separate
1830         routine (because I need to recompute them in seaice_ocean_stress.F)
1831    
1832    checkpoint58b_post
1833    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1834      update output.txt of exp. aim.5l_cs.thSI
1835    o various mnc cleanups and improvements:
1836      + shrink lookup tables by factor of ~4
1837      + better error reporting when running out of lookup space
1838      + able to handle longer path/file names (up to 500 chars)
1839    o adjoint:
1840      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1841      - TBD: "hidden" mom_vecinv recomp. in dynamics
1842    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1843     (allow to differentiate between forcing components using new integer flags:
1844      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1845     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1846    o ecco
1847      - enable trend removal from SSH anomaly obs.
1848    o adjoint
1849      - a fix for PmEpR when #undef EXACT_CONSERV
1850      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1851      - try to fix "hidden" recomp. in forward_step for NLFS
1852        (NLFS seems broken sometimes after I checked it in)
1853    o seaice:
1854     - add c-grid version of the dynamic solver:
1855       + three new routines that are the c-grid substitute lsr, dynsolver
1856         and ostres
1857       + put a few fields that were local to dynsolver into global common
1858         blocks, so that I can move the computation of stresses etc into
1859         seaice_lsr (saves coding but may break the adjoint).
1860     - replace more hardwired parameters by runtime parameters
1861     - add ice masks that mask the rhs of the implicit solvers where there
1862       is no ice (commented out in seaice_dynsolver, because i am not sure
1863       if this works properly), eventually this should replace the clipping
1864       of ice velocities in seaice_dynsolver to +/-40cm/s.
1865    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1866      include it only where its needed
1867    o move balancing of fluxes before the call of external_forcing_surf
1868    o seaice:
1869      - correct units of turning angles (now they are really in degrees)
1870      - move computation of GWATX/Y out of main routine into dynsolver
1871      - initialize GWATX/Y in seaice_init
1872    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1873      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1874    o seaice: add runtime flags for turning angles (default to zero)
1875    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1876      and trend from exf forcing and ctrl control adjustments
1877    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1878      (since checkpoint57x_post)
1879    o change the default rotation period to 86164.s = the Earth rotation
1880    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1881      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1882    o seaice advection: add code for choosing between the default (2nd order
1883      central differences) and multiDim advection schemes provided by
1884      pkg/generic_advdiff
1885    o seaice:
1886      - removed all references to SEAICE_GRID.h fields from
1887        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1888        (cubed-sphere configuration will change a little)
1889      - grid computations in seaice_init are obsolete now.
1890      - cleaned up code a little so that is easier to read (hopefully).
1891      - added new (better?) discretizations of default advection and diffusion
1892        (turn on with SEAICEuseFluxForm)
1893      - replace 1 in 3d global fields by kSurface in growth.F
1894      
1895    checkpoint58a_post
1896    o seaice:
1897      - bug fix in advect.F
1898    o shelfice:
1899      - separate shelfice load anomaly from pload (breaks with time
1900        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1901        Its default is 0., but it may be computed more cleverly from (unknown)
1902        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1903        done offline. A good approximation of the pressure load anomaly is
1904        necessary to avoid large initial adjustment processes underneath
1905        deep-reaching shelfice.
1906      - small fix in ISOMIP shelfice_thermodynamics
1907      - add more sophisticated thermodynamics of Hellmer (1989), this is
1908        now the default
1909      - give a few constants more intuitive names
1910    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1911      if bulk formulae are used in long integration (especially EmPmR). Turn
1912      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1913      if balancePrintMean, the imbalance that is substracted is printed to
1914      STDOUT.
1915    o fix bug (typo) in obcs_apply_eta.F
1916    o add a new package shelfice which enables us to model the circulation
1917      underneath shelf-ice with draughts of hundreds of meters.
1918     - works
1919     - to do: + include improved thermodynamics
1920              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1921                instead of new field kTopC
1922              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1923                instead of new field R_shelfIce and new code in ini_depth.F
1924                and ini_mask_etc.F?
1925              + adjust vertical mixing schemes?
1926    o seaice pkg:
1927     - add a cpp-flag to include a simple formula for a salinity dependent
1928       freezing point of sea water at the surface
1929     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1930       meridional stresses are now different (and hopefully correct)
1931    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1932       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1933       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1934    o pkg/diagnostics: add options and parameters for regional-statistics
1935       diagnostics ; define regions by reading a region-mask from a file
1936       (might add other options later)
1937    o pkg/bulk_force:
1938     - add option and parameters to use AIM surface-flux formulae.
1939     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1940       others forcing fields (defined in PARM05, parameter file "data") are loaded
1941       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1942     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1943     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1944     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1945       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1946     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1947    
1948    checkpoint58
1949    o add "--embed-source" option to genmake2 which, when the supporting
1950      tools can be compiled (as determined by genmake2) will turn on the
1951      embed_files package which then embeds the entire MITgcm source code
1952      (*.[fFhc] + Makefile) used for the build within the executable
1953      - requested by CNH but off by default
1954      - adds a paltry <9MB to the mitgcmuv executable in most cases
1955      - only writes the output when useEMBEDSRC in eedata is true
1956    o clean up 3-dim. relaxation codes:
1957      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1958      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1959      * Thanks to Tom Haine for testing!
1960    
1961    checkpoint57z_post
1962    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1963      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1964    o fix the pickup behavior for obcs in combination with ptracers
1965    o fix a bug in ptracers_external_fields_load
1966    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1967      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1968    o transfered surface NH pressure to eta field (if exactConserv).
1969    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1970         and update lab_sea output.txt file.
1971    o completing 3-dim. relaxation code: additional term
1972         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1973      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1974      * At compile time, in "EXF_OPTIONS.h" set
1975          #define  ALLOW_CLIMTEMP_RELAXATION
1976          #define  ALLOW_CLIMSALT_RELAXATION
1977      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1978          tauThetaClimRelax3Dim = 15552000.0,
1979          tauSaltClimRelax3Dim  = 15552000.0,
1980      * 3 cases:
1981          1) Use a constant-in-time 3-dim. field
1982          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1983          3) Real-time relax. to time-evolving prescribed field
1984    o Adding Laplacian-type smoothness constraint on
1985      initial and boundary (forcing) controls (ic, bc)
1986      * enable at compile-time via
1987        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1988      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1989      * Absolute scale somewhat unclear so far
1990      * no area weighting was included since no other cost term does so far
1991    
1992    checkpoint57y_post
1993    First step for a NLFS adjoint
1994    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1995    o new init. routines for calc_r_star, calc_surf_dr
1996    o still need to deal with ini_masks_etc
1997    o testreport seemed happy
1998    checkpoint57y_pre
1999    
2000    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
2001    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
2002    o add new offset feature to offline pkg (plus minor cleanup)
2003    o cfc fixes for final year of integration
2004    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
2005      be in GCHEM_OPTIONS).
2006    
2007    checkpoint57x_post
2008    o fix testreport Pb in multiple test experiment.
2009    o cleanup our namelist syntax in verification:
2010      - make it more F95 standards compliant (some work still needed)
2011      - allows the vast majority of our tests to work with gfortran
2012    o Non-Hydrostatic:
2013     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
2014     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
2015    o Allow to apply AB on T,S rather than on AB(gT,gS):
2016     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
2017     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
2018       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
2019     - need a "clever" read_pickup to restart from the other AB formulation
2020    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
2021    o remove some unused variables (reduces number of compiler warnings)
2022    o adjoint
2023      * Disable useVariableViscosity for adjoint for time being
2024        (there are a number of extensive recomputations)
2025      * Initialize certain variables needed for adjoint
2026    
2027    checkpoint57w_post
2028    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
2029                 fix the singleCpuIO RS version of MDSWRITEFIELD
2030       and add a WARNING if using globalFiles=T with multi-processors.
2031    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
2032      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
2033    o tracer advection scheme:
2034      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
2035       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
2036       was not very convenient).
2037      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
2038       (further tests needed for the implicit DST & Flux-Limiter schemes).
2039    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
2040      and sRef for convenience, handy, when you want to initialize
2041      ptracers in a large domain with a constant non-zero value. Also,
2042      untangle ptracers_init.F a little.
2043    
2044    checkpoint57v_post
2045    o change dome exp. to use variable viscosity in side-drag terms.
2046    o remove all the files from the cfc_offline test since they are now
2047      incorporated into tutorial_cfc_offline which has been producing
2048      identical results for a few days of testing
2049    o add new parameter: sideDragFactor to enable half-slip-side BC
2050      and change side-drag S/R to use viscosity from mom_calc_visc
2051      (can switch back by setting sideDragFactor=0.); affects results at
2052      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
2053       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
2054    o vorticity & strain are now computed without masking, to account for
2055      no-slip-side BC in variable viscosity calculation ; mask is applied
2056      anyway later on, before computing advection/coriolis terms.
2057    o modify exp4 to test new obcs support for reading from external files
2058      and for passive tracers
2059    o fix behavior of ptracers_monitor when monitor output is written to a
2060      netcdf-file; still not independent of monitor.F (writes in the same
2061      file).
2062    o change default value of tRef (put a uniform, meaningful value for ocean
2063      & atmos) and initialize sRef (was missing, as Martin mentioned).
2064    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
2065      to be proportional to enstrophy dissipation length.  Thus,
2066       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
2067      This is now consistent with Smagorinsky and with the manual.
2068    
2069    checkpoint57u_post
2070    o OBCS and PTRACERS: add open boundary support for passive tracers
2071      - either use homogenous (pseudo) v.Neumann conditions or prescribe
2072        OB-values from file; this is not different from the way theta and salinity
2073        are treated
2074      - however, Orlanski-radiation conditions are not supported, and the model
2075        will stop if you use pTracers and Orlanski at the same time.
2076      - beefed up the rountine obcs_external_fields_load: now only those open
2077        boundary values are overwritten with values from files for which there
2078        are really files, otherwise the OB-fields remain untouched. This makes
2079        it possible to use different OBs at different ends of the domain (as
2080        with EXF)
2081    o reduce number of exch calls in shap_filt (s2).
2082    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
2083      truncation level) 4/5 MLAdjust test results (11&12 digits match).
2084    
2085    checkpoint57t_post
2086    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
2087    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
2088      same truncation, independent of the face number: affects affects several
2089      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
2090    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
2091      note that biharmonic viscosity + no-slip was not tested in any experiment.
2092    o fix bug in non-linear free-surf side-drag ; generate new output for
2093      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
2094    o make mnc honor the writeBinaryPrec flag for most kinds of output
2095    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
2096    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
2097      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
2098    o add brackets in multi-terms sum to get same truncation, independent of
2099      the face number (manage to get exactly same value of gU,gV at the cs-edge)
2100      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
2101    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
2102      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
2103      a maximum grid-scale Reynolds number.  Also, changes all length calculations
2104      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
2105      Suggested values of viscosity parameters found in mom_calc_visc.
2106      Many new viscosity diagnostics available.
2107    
2108    checkpoint57s_post
2109    o Add clearing-house for viscosity calculations, mom_calc_visc and
2110      correct numerous bugs in LeithD and Smagorinsky discretizations.  
2111      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
2112      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
2113      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
2114      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
2115      The Strain-Tension form is now called with useStrainTensonVisc=.true.
2116      ViscAhStrain and viscAhTension are now retired.
2117    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
2118    o In response to JMC's bug report, genmake2 now ignores any soft-links
2119      that it finds in the *current* directory when searching for files.
2120      Soft-links found in any other source directories will still work as
2121      they did before.
2122    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
2123      a C routine to unlimit the stack size
2124    o mnc-ify pkg/aim snapshot vars
2125    o mnc-ify pkg/land as requested by Daniel
2126    o various changes to mnc including:
2127      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
2128      - output can now be grouped so that all files within a group
2129          change the ITER portion of their names in lock-step together
2130      - can now read ("global") PER-FACE (in addition to PER-TILE) files
2131          and works with both EXCH1 and EXCH2 (but needs more testing)
2132      - writing works for all verification test cases w/ g77 on Linux
2133    
2134    checkpoint57r_post
2135    o make MNC variable initialization happen earlier
2136    o add diagnostics for (almost) each term of the momentum Eq.
2137    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
2138    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
2139    o remove MINIMAL_TAVE_OUTPUT option ;
2140      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
2141    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
2142      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
2143    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
2144    o add time-dependent SST, SSS control
2145    o cost terms in ecco/ modularized (new cost_generic.F)
2146    o cost_averages routines are modularized (new cost_averagesgeneric.F)
2147    o new infrastructure for seaice model vs. obs misfits in seaice/
2148      * driver from the_main_loop.F is seaice_cost_driver.F
2149      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
2150      * gradient check in Exp. 6a of natl_box_adjoint/
2151    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
2152      (see README file)
2153    
2154    checkpoint57q_post
2155    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
2156    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
2157      - bug was reported by Jean-Michel and Ian Fenty
2158    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
2159      update exp. cpl_aim+ocn output.
2160    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
2161      Needed for high-res. runs with large global files
2162      to be able to limit tapelev size
2163    o Changed some tests for adjoint:
2164      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
2165      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
2166      * global_ocean.90x40x15/ back to default 3-level checkpointing
2167    o Modifications to enable scripted COMMON to MODULE conversion
2168      * verification/OpenAD/code/ has necessary scripts and description;
2169      * converts, compiles and runs successfully;
2170    
2171    checkpoint57p_post
2172    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
2173    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
2174      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
2175    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
2176    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
2177      (was already the case for dissipation with mom_vecinv,
2178       and also the case for grad.PhiHyd when staggered-timeStep)
2179      This will allow to put dissipation out-off the AB time-stepping.
2180     Unfortunately, affects truncation error. Update output of exp. that "fails"
2181      (cg2d matching number) and leave the others for later: front_relax(10),
2182      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
2183      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
2184    
2185    checkpoint57o_post
2186    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
2187      (2) its ready to be documented during the 20050801 DocFest
2188    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
2189      for ideal_2D_oce and lab_sea on linux_ia32_g77
2190    o set to #undef CTRL_SET_OLD_MAXCVARS_30
2191      in global1x1_tot/code_seaice_adj to access indices 32, 33
2192      (worth another tag)
2193    
2194    checkpoint57n_post
2195    o adding precip control xx_precip 32
2196    o adding swflux control xx_swflux 33
2197    o Replacing 10 forcing penalty cost routines by 1 generic.
2198    o Implementing partitioning in time-mean and variable adjustment
2199      for atmos. state.
2200    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
2201    o in natl_box_adjoint:
2202      * updated exp 1 to 10
2203        (but does not have time-mean vs. variable split results yet)
2204    o updated global1x1/*_seaice_adj/
2205      to incorporate latest changes
2206    o enable useSingleCpuIO for mdsio vector routines
2207      (applies in particular to tapelev I/O)
2208    o removed inefficient K-loop in all active_file*control*.F
2209    
2210    checkpoint57m_post
2211    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
2212      and advect_cs (use EXCH-2 and standard cs-32 grid files).
2213    o pkg/exch2: filling of face-corner halo regions is optional
2214      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
2215    
2216    checkpoint57l_post
2217     tag before updating tutorials (pre-release-2)
2218    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
2219       for output and interpolation of input fields onto model grid)
2220    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
2221       Affects results of exp. rotating_tank ; update output.txt.
2222    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
2223          and taking the square quantity and/or using a fraction-weight field.
2224    o fix aim_diagnostics_init.F mate numbers.
2225    o add mnc output capability to diagnostics/diagstat and update
2226      our cvsignore files for the ACSII output generated
2227    
2228    checkpoint57k_post
2229    o lab_sea now uses diagnostics package and provides a suite of
2230      new EXF diagnostics output.
2231    
2232    checkpoint57j_post
2233    o exf
2234      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
2235        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
2236        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
2237      * extended diagnostics output
2238        - now includes all EXF variables
2239        - hs, hl moved to common block
2240        - separate S/R for diagnostics, called after ctrl vector is added
2241        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
2242        - EXFqnet contains true Qnet (i.e. includes qsw)
2243      * updated verif. lab_sea, global_with_exf
2244      * Rearranging hflux (exf_mapfields -> exf_getforcing)
2245        to ensure that diagnostics sees a true EXFqnet
2246    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
2247    o diagnostics pkg: change pointers so that 1 diagnostic can be used
2248      several times with different frequencies.
2249    o mnc-ify the thsice package as requested by Daniel Enderton
2250      - the monitor--MNC output needs work
2251      - many attributes need to be added (most are currently blank)
2252    o mnc-ify theaim_v23 package as requested by Daniel Enderton
2253      - many attributes need to be added (most are currently blank)
2254    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
2255    o add Sadourny like discretization to the 4th.O vorticity advection scheme
2256    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
2257      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
2258         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
2259    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
2260     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
2261    
2262    checkpoint57i_post
2263    o Diagnostics package was changed: diagnostic allocation is now deactivated
2264      by setting an empty file name in the namelist (used to be by setting 0 frequency)
2265    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
2266      add 1rst Order upwind vertical Shear.
2267    o add a quick fix for A/B checkpointing in OFFLINE mode
2268    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
2269      end-run around the C/Fortran linking horror in eesup/src/timers.F
2270    o added pkg/runclock: allows user to terminate run based on wall clock
2271    o added non-hydrostatic scaling parameter: nh_am2
2272    o pkg/my82: futile attempt to make results compiler-independent by adding
2273      some "_d 0", etc. no effect.
2274    o for mnc output, fill the 'T' coordinate var with myTime and create a
2275      separate 'iter' variable for iteration count
2276    o pkg/diagnostics:
2277      add new capability: output of Global/Regional & per-level statistics ;
2278      tested against monitor output (including land & thSIce) on various exp.
2279    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
2280    
2281    checkpoint57h_done
2282      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
2283      data.diagnostics, data.gchem, data.ptracers) is done.
2284    
2285    o pkg/diagnostics: prepare for Global/Regional statistics.
2286      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
2287    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
2288      and rename it: DIFFERENT_MULTIPLE
2289    
2290    checkpoint57h_post
2291    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
2292    o pkg/diagnostics: change output frequency, now in seconds (instead
2293      of Nb of iterations). This requires to change data.diagnostics.
2294    checkpoint57h_pre
2295    
2296    o in mnc, let the user create the output dir if both mnc_outdir_date
2297      and mnc_outdir_num are false
2298    o add fflags() to pkg/diagnostics which allows one to specify, on a
2299      per-file basis, the file precision [default behavior is unchanged]
2300    o added diagnostics to pkg/kpp, including computation of mixed layer
2301      depth based on a temperature/density criterion
2302    o updated verification/natl_box to test the new pkg/kpp diagnostics
2303    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
2304    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
2305    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
2306      not mnc -- this mistake was found by JMC and is now corrected
2307    
2308    checkpoint57g_post
2309    o add Adams-Bashforth 3rd Order time stepping:
2310      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
2311      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
2312    checkpoint57g_pre
2313    
2314    o make lambda[Theta,Salt]ClimRelax spatially varying
2315      (default remains spatially uniform constant based on tau)
2316    o added new control variables
2317      * init. uVel, vVel, etanN
2318      * lambda[Theta,Salt]ClimRelax
2319    o separate masks used for ctrl_pack/unpack 'from write_grid' output
2320      (suggested by G. Forget)
2321    
2322    checkpoint57f_post
2323    o add parameter "baseTime" = model base time = time at iteration zero
2324      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
2325      account for baseTime shift
2326    o move Coriolis arrays from PARAMS.h to GRID.h
2327    checkpoint57f_pre
2328    
2329    o mnc-ifying the seaice package
2330    o introduced an alternative length scale calculation for use in the limiting
2331      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
2332    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
2333    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
2334      as well as grad(vort3).  Made it compatible with both approximate form
2335      for the cubed sphere and full form of these gradients.  Added flag
2336      useFullLeith to select between approximate and full form.  
2337    o add "d0" in getcon.F to reduce differences between compilers/platforms
2338      update output.txt of exp. fizhi-gridalt-hs
2339    o change port_rand funtion to allow to set the seed.
2340    o fix obscure MNC bug involving conversion between reals and integers
2341      - it caused no problems with certain (eg. gcc, ifc) compilers but the
2342        new version is now more standards-compliant
2343    o adjoint-related modifications
2344      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
2345      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
2346      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
2347    
2348    checkpoint57e_post
2349    o Adding eddy stress controls a la Ferreira et al.
2350    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
2351    
2352    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
2353      update output.txt of exp. fizhi-gridalt-hs
2354    o add more "Z" dimensions and associated coordinate vars to MNC
2355    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
2356    o parameter calendarDumps: when set, approximate months (30-31 days) and years
2357      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
2358      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
2359      months and years.  Requires pkg/cal.
2360    o diagnostics: add pickup functionality
2361      - off by default for backwards compatibility
2362      - current version only uses MDSIO -- MNC will be added
2363    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
2364    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
2365    
2366    checkpoint57d_post
2367    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
2368    o modify verification/ideal_2D_oce so that it tests the creation of mnc
2369      output from the diagnostics package
2370    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
2371    o make genmake2 more portable by using ".$FS" instead of ".f" for more
2372      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
2373    o add coordinate variables to the MNC output from the diagnostics package
2374    o change MNC-flags default value: true when useMNC=TRUE
2375    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
2376      the ability (off by default) to read the grid information using MNC
2377    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
2378    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
2379    o do snap-shot diagnostics at the middle of the time-interval (instead of
2380      at the end).
2381    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
2382      new test for AIM with thSIce + slab-ocean
2383    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
2384    o move state variable diagnostics to the beginning of the time step ;
2385      (note: still needs some work specially for snap-shot diagnostics)
2386      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
2387    
2388    checkpoint57c_post
2389    o Change testing option (-ieee) to get closer agreement between g77 & ifort
2390    o generate new output.txt files on faulks with g77 & the new -ieee option
2391    checkpoint57c_pre
2392    
2393    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
2394      update output.txt of exp. global_ocean.90x40x15
2395    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
2396      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
2397    o add saltFlux(+File) forcing capability with periodicExternalForcing
2398    o allow to use pkg diagnostics for GM-Redi & ThSIce output
2399    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
2400    o improvements for the MNC output from DIAGNOSTICS:
2401      - correct handling of the unlimitied dimension
2402      - all dims now have associated coordinate variables
2403      - variables located at U, V, and Corner ("Z") points are now written
2404        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
2405        *all* data points are output
2406    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
2407    o added pkg/seaice/seaice_monitor.F
2408    o mdsio_readfield.F can now read files visible only to master MPI process.
2409    o pkg/seaice: some test code for ice-modified ocean stress
2410    o exf_getffields interpolation defaults to bilinear for all scalar forcing
2411      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
2412      spurious negative numbers for precipitation and humidity.  Will cause
2413      some small numerical differences for integrations using pkg/exf/exf_interp.F.
2414    o pkg/ctrl/
2415      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
2416        May be enabled via doPackDiag
2417      *  introduce z-scaling of
2418         + gradient (doZscalePack) and
2419         + control (doZscaleUnpack)
2420    o pkg/mdsio/
2421      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
2422      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
2423    
2424    checkpoint57b_post
2425    o simplify options in diagnostics_fill arguments (remove weird combinations)
2426    o fix MNC coordinate variables so that they now contain per-face index
2427      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
2428      general, EXCH2 grids are only aligned to a "local" coordinate system
2429    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
2430    o Implement instantaneous output within pkg diagnostics:
2431      setting a negative frequency in data.diagnostics produces
2432     "snap-shot" output (as opposed to time-average if freq > 0)
2433    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
2434      NOTE: change ptracer diagnostics name: use 2 characters to work with
2435            more than 9 tracers. Add also diagnostics of advect & diffus flux.
2436    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
2437      becomes the coordinate variable for the 'T' dimension
2438    o add CF-style coordinate variables to MNC
2439      - just a first cut:  numbers are meaningless on the cubesphere and
2440        missing along the T axis but otherwise it works!
2441    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
2442    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
2443    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
2444      this is based directly on what the model compute, so that the content of
2445      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
2446    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
2447    o clean up build options files for SunOS, in particular
2448      - remove -traditional from xmakedepend
2449      - change -xarch=v9 to -xarch=native for f77
2450      - restore use of make (not gmake)
2451      - add CC=gcc if using g77
2452    o changes per discussion of AM, JMC, & EH3 today:
2453      - move redundant "grid" variables out of "state" -- in preparation of
2454        creating proper CF-style coordinate variables and in recognition
2455        that any/all grid variables can be easily copied (eg. w/NCO) from
2456        the grid files into any of the other NetCDF files
2457      - *always* output grid variables with MDSIO (this will eventually be
2458        changed)
2459      - output MNC grid file if useMNC is true
2460    o every instance of _END_MASTER() has been found and replaced with
2461      _END_MASTER( myThid ) in order to satisfy certain picky Sun
2462      preprocessors
2463    o re-arrange diagnostics pkg initialisation:
2464     - allow each package to extend the available diagnostics list
2465     - add some checking and fix small problems (multi-threaded, ...)
2466     - new S/R diagnostics_fill (replace fill_diagnostics):
2467       look through the short list of active diag. (instead of the long list)
2468       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
2469    
2470    checkpoint57a_post
2471    o this set of changes restores TAMC compatibility
2472      tested for global_ocean.90x40x15 adjoint on trough
2473      (what a pain)
2474    
2475    checkpoint57a_pre
2476    o some modifs in tools/build_options for sunos
2477    o call ctrl_pack for ctrl at end for optimcycle=0
2478    
2479    checkpoint57
2480    o add horizontal bi-harmonic viscosity for vertical velocity
2481      - new parameter viscA4W (defaults to viscA4)
2482      - affects only non-hydrostatic code
2483      - to be done: no-slip lateral boundary conditions
2484    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
2485    o implement Implicit Vertical advection for pTracers
2486    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
2487      (implemented also for implicit vertical diffusion & advection)
2488    o OBCS: extend application of tracer open boundary conditions
2489      to a strip beyond the boundary of width Olx/Oly
2490    o add call monitor to TAF set of required calls (flow directives)
2491      and include in natl_box_adjoint
2492    o untangle a few ifdefs related to cost, ctrl, autodiff
2493      untangel a few ALLOW_ECCO_OPTIMIZATION
2494    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
2495      (theta2, salt2 in ecco_cost_weights)
2496    
2497    checkpoint56c_post
2498    o OBCS as control variables
2499      - update ctrl_ad_diff.list, obcs_ad_diff.list
2500      - remove balance of obcs controls from default
2501      - fix index bug nobcs in ctrl_init
2502      - fix dummy fields filen in ctrl_pack
2503      - add dummy weights for obcs
2504    o lsopt: comment out fort.94 output
2505    o optim:
2506      - remove unnecessary header files
2507      - adjusted namelists
2508      - add xerbla.F to Makefile
2509    o exf:
2510      - multiple modifications of exf_check_range
2511      - unit change in exf_init_runoff from [m/year] to [m/s]
2512    o mdsio:
2513      - i/o-vector change debugLevel from debLevA to debLevB
2514    
2515    checkpoint56b_post
2516    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
2517      is called from DO_THE_MODEL_IO
2518      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
2519      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
2520      - clean up PTRACERS_WRITE_TIMEAVE a little
2521    o add another verification experiment that tests both the cfc-pkg and
2522      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
2523      reactive tendencies treated inline with regular timestepping
2524    o testreport previously did a lousy job of comparing small numbers, so
2525      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
2526      implemented in the little c-progam tmp_cmpnum.c which is embedded in
2527      testreport.
2528    o ptracers_monitor: bug fix for MPI
2529    
2530    checkpoint56a_post
2531    o GCHEM: finish reorganizating the package
2532      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
2533        (introduces another 3D-array for each passive tracer, but only if
2534        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
2535        gchemTendency is not needed because the timestep is done separately)
2536      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
2537      - GCHEM is now---more or less cleanly---separate from PTRACERS
2538      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
2539        so clear to me how that should be done in a general way.
2540    o CFC: improve formatting of output in CFC_ATMOS
2541    o PTRACERS:
2542      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
2543        that ALL experiments with ptracers enable can be checked. This makes
2544        GCHEM_MONITOR obsolete.
2545      - include a runtime parameter PTRACERS_monitorFreq that defaults to
2546        monitorFreq
2547      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
2548    o add PTRACERS (PTR0[1-5]) to testreport output
2549    o exf_check_range:
2550      * default changed to .TRUE.
2551      * will check values for niter0 if debLevA, every timestep if debLevB
2552      * STOP in exf_check_range if 'out of range'
2553      * range chosen generous to allow for potential extema
2554      TBD: a version with stricter range
2555           permitted range would be runtime parameters
2556    o GMredi:
2557      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
2558      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
2559      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
2560    o GCHEM:
2561      - move call to GCHEM_FORCING_SEP, so that it is now called before
2562        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
2563      - introduced a useGCHEM runtime flag and applied it everywhere.
2564      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
2565        this flag is now only visible within GCHEM-pkg routines.
2566      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
2567        be replaced by a 3D array that is computed before thermodynamics; for
2568        this, the tracer ID iTracer had to be included into the parameter list
2569        of ptracers_forcing
2570      - set up forward_step to call gchem_forcing, that will replace
2571        gchem_forcing_int in ptracers_forcing
2572      - cleaning up
2573    o small cleaning of exch2: remove files that are also in eesupp/src
2574    
2575    checkpoint56
2576    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
2577    o mnc: cleanup "full" files--fixes out-of-memory problem
2578    o ECCO-GODAE
2579      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
2580      * fully merged and updated from SIO code
2581        windstress sign change affects
2582        - exf_inscal_[u/v]stress
2583        - sign of xx_tau[u/v] adjustments
2584        - signs in cost_scat
2585      * ctrl_get_gen: avoid update of tau[u/v] for first few days
2586      * natl_box_adjoint updated and compressed
2587      * 2-level checkpoint switch added
2588        (tested in EXP. 1 of natl_box_adjoint)
2589      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
2590    o SVD
2591      * first complete, non-hacked version for SVD calculations
2592      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
2593        performed via direct access files admtlm_vector.it????
2594        (via ctrl_[un]pack)
2595      * optimcycle is used for ARPACK iteration counter
2596        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
2597      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
2598        and add linear transforms where necessary
2599      * controls are initial/final SST, SSS (can be extended; need to check
2600        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
2601    o mdsio: filename info to both stderr, stdout
2602    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
2603      from sign change
2604    
2605    checkpoint55j_post
2606    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
2607      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
2608    o add consistent build directories and .cvsignore files to verification
2609    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
2610    o make all subroutines 30 or less characters in length for certain older
2611      compilers to work (a thorough search only turns up two routines in
2612      pkg/ptracers)
2613    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
2614      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
2615    
2616    checkpoint55i_post
2617    o change arrays for total vertical diffusivity (2.D if explicit,
2618      3.D if implicit) ; each ptracer uses its own background value.
2619    o added mnc/NetCDF output capability to ocn_compon_interf
2620      - added bits to verification/cpl_aim+ocn so that it can run on
2621        ITRDA and other clusters without the mpirun "-wd" option
2622    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
2623      configuration
2624    o give MNC the ability to create additional files rather than
2625      exceeding a specified file size limit "MNC_MAX_FILESIZE"
2626      - the default is just less than 2GB which is a practical limit
2627        on many systems
2628    o Compute the non-local term using either KPP vertical diffusivity (=default)
2629       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
2630    
2631    checkpoint55h_post
2632    o add verification test "vermix"
2633    o remove all the *_ioinc flags and replace with the single global
2634      outputTypesInclusive flag
2635    o allow to set a vertical profile of vertical diffusivity for T & S
2636    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
2637    o useMNC moved from data.mnc to data.pkg
2638    
2639    checkpoint55g_post
2640    o Renaming carbon AD experiments to comply with testreport conventions
2641    o Updating adjoint of Held-Suarez hs94.1x64x5
2642    o Fixing directives for non-ECCO forward_step, after ECCO directives
2643      have been fixed to avoid recomp. of do_oceanic_phys
2644      Works well for global_ocean.90x40x15,
2645      but recomp. issue remains for carbon
2646    o Updating adjoint output for natl_box_adjoint after
2647      pkg/ecco has been modified (see taga c55d_post)
2648    
2649    checkpoint55f_post
2650    o rename to timeave_init_fixed
2651    
2652    checkpoint55e_post
2653    o some delicate re-shuffle of store directives to avoid one
2654      extra call of do_oceanic_physics
2655      affects ecco_the_main_loop.F, do_oceanic_physics.F
2656      checkpoint_lev1_directives.h
2657    o NB: this may break global_ocean adjoint temporarily,
2658      but it is clear how to fix it. Will do later, need this now.
2659    
2660    checkpoint55d_post
2661    o ECCO specific cost function terms (up-to-date with 1x1 runs)
2662    o ecco_cost_weights is modified to 1x1 runs
2663    o modifs to allow observations to be read in as
2664      single file or yearly files
2665    o enable to read exf forcing fields as either
2666      single file or yearly files (flag useExfYearlyFields)
2667    checkpoint55d_pre
2668    
2669    o switch between 2-level and 3-level checkpointing
2670    o add ability of MNC to write local and "partial" (eg. 2D slices where
2671      the full 3D field is never actually stored) arrays to NetCDF files
2672      with the correct (that is, the complete multi-dimensional) set of
2673      array indicies
2674      - used in mom_vecinv() to write the diagFreq output
2675      - tested (demonstrated) in verification/aim.5l_cs
2676    o further mnc-ification
2677      - add verification/lab_sea to the list with mnc setups
2678      - fix undefined mnc v-names in cd_code
2679      - add kpp to mnc output (both snapshot and timeave)
2680    o non-hydrostatic code
2681      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
2682        in calc_gw.F
2683      - defaults to viscAh
2684      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
2685        friction or Leith) in non-hydrostatic mode, as long as there is
2686        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
2687    o pkg/cost
2688      extend simple cost functions to treat time mean quantities
2689      (T,U,V) via cost_accumulate_state from cost_tile
2690    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
2691        be 2 times larger than the minimum size the advection scheme requires.
2692        now get a perfect conservation of salt in advect_cs test-exp (updated)
2693    o GGL90 (Gaspar's TKE mixed layer)
2694      - add horizontal diffusion of TKE, requires exchanges in
2695        do_fields_blocking_exchanges, horizontal diffusivity is zero by
2696        default. In OPA there is no horizontal diffusion of TKE but the
2697        mixing coefficients are computed from a horizontal average of TKE of
2698        6 points or so. I think that diffusion has a little more physical
2699        justification.
2700      - clean up ggl90_calc in the hope of reducing memory usage (this hope
2701        was in vain)
2702      - mask tke-variable in ggl90_init
2703    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
2704    o fix biharmonic diffusion on CS-grid.
2705    o more obcs stuff
2706      - added obcs_external_fields_load as an alternative to the EXF-pkg option
2707        for reading boundary values. This routine is called from
2708        obcs_prescribe_read
2709      - updated obcs_check
2710      - changed sponge layer relaxation parameter units for days to seconds
2711      - turned off sponge layer by default
2712      - changed argument list of OBCS_CALC to myTime+deltaTclock
2713      - fixed about 35 bugs in obcs_external_fields_load
2714    
2715    checkpoint55c_post
2716    o obcs stuff
2717      - new runtime flags useOBCSprescribe, useOBCSbalance
2718      - re-arranged obcs_calc
2719      - moved exf_getobcs to obcs_prescibe_read
2720        obcs_prescibe_read is called after ORLANSKI stuff
2721        and independent of it (executable can contain all).
2722      - updated obcs_check
2723      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
2724        These may be necessary only if tangential velocities are
2725        prescribed at OB, not sure, needs testing.
2726    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
2727      which simplifies the calls and passes the ifc check-bounds test
2728    
2729    checkpoint55b_post
2730    o add a 2D scalar, Z location, exchange_2 routine.
2731    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
2732      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
2733      affects advect_cs results (for the wrong reason): update output.txt
2734    o use a more standard discretization for biharmonic viscosity ;
2735     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
2736      affects results of dome set-up: update output.txt
2737    o fix gad_advection.F (CubedSphere part), back to version 1.23
2738    o fix bug in mom_vi_del2uv.F (CubedSphere part).
2739    
2740    checkpoint55a_post
2741    o merged code to
2742      * prescribe/read time-dependent open boundaries
2743        (works in conjunction with exf, cal)
2744      * sponge layer code for open boundaries
2745      * each boundary N/S/E/W now has its own CPP option
2746        (healthy for the adjoint)
2747    
2748    checkpoint55
2749    o up-to-date adjoint of previous breaks
2750      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
2751      - global_ocean_ebm: adjoint still needs fix (TLM ok)
2752      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
2753      - carbon: * remove tr1-related adjoint verification
2754                * add ptracer as control variable
2755    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
2756      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
2757    
2758    checkpoint54f_post
2759    o in verification/carbin/ remove experiment related to
2760      ALLOW_PASSIVE_TRACER (array tr1 etc)
2761      code_ad/ input_ad/ results_ad
2762    
2763    o add two new packages
2764      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
2765        + subject to optimization (memory)
2766      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
2767        + subject to reordering (many GOTOs in the original code)
2768        + so far opps is called for every (i,j) point, and then operates in
2769          the vertical; one may want to reorder the scheme in order operate in
2770          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
2771          fields)
2772    o overhaul of IO so that we now have flags for MDSIO and/or MNC
2773      - all verification tests compile and run with linux_ia32_g77
2774      - defaults are compatible with current input files--nothing
2775        should change if you were not previously using MNC
2776      - MNC output has been added in numerous places (eg. timeave)
2777        but there are still a few writes not yet do-able with MNC
2778        (this is in progress)
2779      - flags now allow for either/or/both use of MDSIO and MNC and
2780        documentation will soon follow
2781      - numerous small formatting cleanups for ProTeX
2782    o add version info (via BUILD_INFO.h) to MNC and stdout
2783    
2784    checkpoint54e_post
2785    o add two new packages
2786      - pp81 (Packanowski and Philander, 1981), Richardson number and
2787        stratification dependent mixing
2788      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
2789      - these scheme operate in a similar manner as KPP (without ghat, of
2790        course), however there is only one diffusivity that is used for both
2791        temperature and salinity (and passive tracers)
2792    o add offline package
2793    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
2794      provided by Stephanie Dutkiewicz
2795    o genmake2: add ability to search for C compilers and cleanup test output
2796      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
2797    
2798    checkpoint54d_post
2799    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
2800    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
2801      leading to additional shift by 5 days each year of integration
2802       (i.e. leading to considerable offset over the years)
2803    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
2804    o start with no AB and no initial filtering (staggerTimeStep):
2805      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
2806    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
2807      (external loading & cpl import/export stay in forward_step.F)
2808    o update coupling interface to work with new staggerTimeStep
2809    o change MDSIO ptracers_pickup.
2810    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
2811    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
2812    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
2813    
2814    checkpoint54c_post
2815    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
2816      this affects (truncation error) output.txt of test-exp:
2817       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
2818    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
2819    o change Qnet to always be the net heat flux, (+upward).
2820      affects (truncation error) output of natl_box exp.: updated
2821    o define the max number of passive tracers in PTRACERS_SIZE.h
2822    o start to test mnc routinely in exp0
2823    o add sea-ice loading (sIceLoad) as a new forcing field.
2824    
2825    checkpoint54b_post
2826    o add testreport "-j JOBS" option for parallel builds (tested and pretty
2827       impressive on Altix and Opteron systems)
2828    o diagnostics can now write NetCDF files through the mnc package
2829    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
2830    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
2831    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
2832      affects (truncation error) output of lab_sea & natl_box exp.: updated
2833    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
2834    
2835    checkpoint54a_post
2836    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
2837    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
2838    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
2839    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
2840      + internal_wave (shift in writing cg2d_ini_res)
2841    checkpoint54a_pre
2842    
2843    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
2844      - modified verification/lab_sea and natl_box_adjoint accordingly
2845    
2846    checkpoint54
2847    checkpoint53g_post
2848    o prepare splitting of thermodynamics: store convect.counter in common block
2849    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
2850      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
2851    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
2852    o new parameter "nShapS": allow to treat differently S from T (nShapT)
2853    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
2854    o restore adjointability
2855    
2856    checkpoint53f_post
2857    o modifications that affect AIM experiment results (update output.txt):
2858      - no advection of S at top interface Nr (pkg/generic_advdiff)
2859      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
2860    o AIM pkg:
2861      - include stability function into surf.Flux derivative relative to Tsurf
2862      - calculate clear-sky radiation & surface temp. change (for diagnostics)
2863    
2864    checkpoint53e_post
2865    o merged cylindrical coord configuration
2866    o added rotating_tank experiment
2867    checkpoint53e_pre
2868    
2869    checkpoint53d_post
2870    o faulks upgraded: re-generate output.txt that have changed:
2871       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
2872    o Added Bryan and Lewis, 1979, vertical diffusivity profile
2873    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
2874    o added Sadourny discretization of Coriolis
2875      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
2876      - re-enabled use of omega3 (useAbsVorticity)
2877    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
2878      vector-invariant equations
2879      - note: does *NOT* yet use same variable visc. for no-slip BC's.
2880    o recoded the lateral boundary conditions for non-hydrostatic w, this time
2881      hopefully without new bugs
2882      - still to do: biharmonic friction for non-hydrostatic w
2883    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
2884    o regenerated output for global_ocean_ebm (using -ieee)
2885    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
2886      of mom_common/
2887      - simple re-arrangement of instructions within computing loop
2888    checkpoint53d_pre
2889    
2890    checkpoint53c_post
2891    o new version of coupler for AIM+thSIce and Ocean models
2892     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
2893     - land: change Evaporation of snow
2894     - aim with thSIce: fix bug in snow-precip.
2895    o changes to calc_gw.F
2896     - bug fix for w^2 term near the bottom boundary
2897     - (hopefully) improve the lateral slip boundary condtions for use with
2898        partial/looped cells
2899      - because the bug fix changes two verification experiments anyway (exp5
2900        and plume on slope), change the lateral boundary condition from half slip
2901        to the value of no_slip_sides
2902    o ebm package wasnt quite up to the parallel task. Fixed that.
2903    o Adjoint of EBM package + verification
2904      * TLM OK
2905      * ADM not sufficient accuracy yet (needs further testing)
2906    
2907    checkpoint53b_post
2908    o Commiting new energy balance model to repository
2909      * package is pkg/ebm
2910      * verif. is verification/global_ocean_ebm
2911      * references are in ebm_driver.F
2912    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2913    C        Global thermohaline circulation. Part I:
2914    C        Sensitivity to atmospheric moisture transport.
2915    C        J. Climate 12(1), 71-82
2916    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2917    C        Global thermohaline circulation. Part II:
2918    C        Sensitivity with interactive transport.
2919    C        J. Climate 12(1), 83-91
2920    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
2921    C        Destabilization of the thermohaline circulation
2922    C        by atmospheric eddy transports.
2923    C        J. Climate 7(12), 1870-1882
2924    o Will need long integration testing.
2925    checkpoint53b_pre
2926    
2927    o created pkg/mom_common in preparation for variable viscosity code
2928    o renamed and split ini_mnc_io
2929    o pkg/land: only liquid water can diffuse or run-off
2930    o AIM using land: soil wetness availability account for snow
2931    o added printMapIncludesZeros to EEPARMS namelist
2932    
2933    checkpoint53a_post
2934    o restore TAMC compatiility for exf_constants.h
2935      (no usage of _d in .h)
2936    o Additional storing in KPP in an attempt to fix
2937      TAMC problem with adjoint of KPP code.
2938      (no success...)
2939      Identical code works fine with TAF.
2940    o Fixed verification/natl_box_adjoint experiments.
2941      Initial conditions for Experiments 4 and 5 are now
2942      set to "SEAICE_initialHEFF=0", which is more reasonable,
2943      and hence gives results closer to that of Experiment 2.
2944      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
2945    
2946    checkpoint53
2947    o stable checkpoint with up to date adjoint
2948      TLM tests only run for 1st grdchk at the moment. Its unclear if
2949      this is a code problem or a problem with resetting code for g_
2950      variables that is being autogenerated wrong.
2951      Otherwise:
2952       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
2953       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
2954         are both still in chaos following their security messes.
2955    
2956    checkpoint52n_post
2957    o various build (mostly genmake2) changes including:
2958      - ability to build/run more easily within Cygwin and MacOS X
2959      - more complicated Makefiles with a stronger dependence on Gnu Make
2960    o pkg/seaice modifications
2961      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
2962        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
2963        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
2964      - changed proxy for geostrophic velocity and updated
2965        verification/lab_sea/results/* accordingly
2966      - removed ADI dynamic solver from pkg/seaice
2967      - replaced all occurrences of 1/CSTICE or 1/CSUICE
2968        they caused a segmentation fault under certain circumstances
2969      - removed unused field WATR
2970    o bug fix in exf-package:
2971      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
2972         now reflect that.
2973    o small fixes in the cal-package:
2974      - set reference date to first of January for the 'model'-calendar
2975      - failing of cal_CheckDate in cal_FullDate now actually results in a
2976        warning
2977    o small modifications in exf-package to increase flexibility:
2978      - change climtempfreeze from a constant to a runtime parameter that
2979        is specified in data.exf_clim (default = -1.9)
2980      - introduce runtime parameter windstressmax (default = 2.0) that is
2981        specified in data.exf
2982    o fix in pkg/thsice:
2983      - update Evap (Tsf changes) to be consistent with Latent heat flux
2984      - maintain snow precipitation unchanged (even if Tsf >=0).
2985     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
2986    
2987    checkpoint52m_post
2988    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
2989      this does not change any of the results, because myIter=0 in swfrac always
2990      lead to jwtype=2 (the default anyway), but the call makes little sense
2991      as a default
2992    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
2993    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
2994      atmospheric model (AIM) to use it ; add a "slab ocean" component.
2995    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
2996    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
2997    o extending useSingleCpuIO option to work with new exch2 I/O format
2998      - old-style, missing-tile I/O is still accessible by defining CPP
2999        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
3000    o monitor package can write to NetCDF files and/or STDOUT
3001    o fix re-definition bug in MNC_GRID_INIT_ALL()
3002    o doc/api_reference added
3003      - a framework for building an API Reference Manual using all
3004        the "protex" comments embedded in the code
3005      - see pkg/generic_advdiff, pkg/mnc for examples
3006    o MNC:
3007      - make myThid the last argument for all subroutines
3008      - new default for the grid files: NO halos
3009      - add useMNC and other run-time flags
3010      - separate per-file-group handling of the unlimited dimension
3011      - early initialization of MNC w/ flags read at the eeboot stage
3012        and lookup tables set in initialize_fixed
3013      - write all MNC output to a freshly-created directory
3014    o thermodynamics sea-ice (thsice) is now tested with testreport.
3015    o test exp. advect_cs: use the standard cs32 grid ; update output.
3016    o Added functionality to grdchk:
3017      pick global i,j,k position (or nearest wet) where to perform check.
3018    
3019    checkpoint52l_post
3020    o new land formulation:
3021      a) use ground enthalpy as prognostic variable to ensure exact
3022         energy conservation.
3023      b) account for water temperature and for latent heat of freezing
3024         in all processes (rain, run-off, ground storage)
3025      c) compute surface and ground temperature implicitly.
3026    o aim_v23 modification for new land model:
3027      a) Treat separately land / ocean / sea-ice surface fluxes
3028         to allow implicit computation of land & sea-ice surface temp.
3029      b) add snow precipitation.
3030    checkpoint52l_pre
3031    
3032    o fix problem (when 1 tile is empty) in min/max monitor.
3033    o fix bug in timeAve (u,vZetatave in common block)
3034    o no restoring terms under ice for pkg/seaice
3035    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
3036    o bug fix for pkg/seaice pickups
3037    o change MNC call locations and add coordinate attributes
3038    o mask vorticity at the corner ; affects global_ocean.cs output
3039    o fix ini_curvilinear_grid ; test CS experiments with mpi
3040    o aim.5l_cs: modify sea-ice fraction input file ; update output
3041    o exf: Adding simple range check routine for exf fields after read
3042    
3043    checkpoint52k_post
3044    o removed top-level directory "diags"
3045      - we migrated these functions to pkg/timeave a long time ago
3046    o fixed bug introduced in pkg/monitor
3047    o accuracy ctrlprec = 32 insuffient for gradient checks using
3048      averaged fields (I/O via cost_averages)
3049      -> use ctrl.h in active_file*.F to control I/O precision.
3050    o paramter list of CALL ADTHE_MAIN_LOOP
3051    o added initial do_the_model_io to ecco
3052    o set all ...Freq to zero after cost_final
3053      taveFreq, dumpFreq, pChkptFreq
3054    o MAIN and ECCO differentiability restored
3055    
3056    checkpoint52j_post
3057    o fix nchklev in tamc.h for global_ocean...
3058    o Bringing flow and store directives up-to-date
3059    o Really weird thing!
3060      call do_the_model_io from the_main_loop with parameters
3061      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
3062      TAF places a faulty re-call of initialise_varia
3063      after cost_final call which should not be there!
3064    checkpoint52j_pre
3065    
3066    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
3067      error messages
3068    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
3069    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
3070      debug output
3071    o modfied mdsio_writefield.F to handle non-global files under exch2
3072    o update AIM Cubed-Sphere exp (aim.5l_cs):
3073      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
3074    o update AIM Equatorial Channel exp:
3075      use standard aim_v23 pkg and change the SST fields to be more realistic.
3076    o globalFile now works with exch2
3077    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
3078      mon_vort3.F to make exch2 friendly with >1 tile per cube face
3079    o limit timeave output for hi-res integrations
3080    
3081    checkpoint52i_post
3082    o removed CPP_EEOPTIONS.h from verification/*/code
3083    o updated the tiling for global_ocean_pressure
3084    checkpoint52i_pre
3085    
3086    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
3087      the old pkg/aim).
3088    
3089    checkpoint52h_pre
3090    o shortened offending lines in exch2_send_rx?.template
3091    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
3092    o genmake2: add build & execute test for NetCDF code
3093    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
3094      old grid files, moved CPP_EEMACROS.h to pkg/exch2
3095    o added useSingleCPUIO flag to monitor.F and mon_out.F
3096    o added temporary hack for sea-ice dynamics on the cube:
3097      metric terms are ignored and it is assumed that
3098      there is no sea-ice on cube faces 1, 2, 4, and 5.
3099    
3100    checkpoint52f_post
3101    o added exch2 cube routines to pkg/exch2
3102    o modified hs94.cs-32x32x5 to use it
3103    o added new grid files to hs94.cs-32x32x5
3104    checkpoint52f_pre
3105    
3106    checkpoint52e_post
3107    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
3108      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
3109    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
3110      to work with implicit vertical advection and AB ;
3111    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
3112    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
3113     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
3114    checkpoint52e_pre
3115    
3116    o fix bug in impldiff when Nr=1 or Nr=2.
3117    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
3118    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
3119    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
3120      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
3121    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
3122    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
3123    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
3124    
3125    checkpoint52d_post
3126    o re-tiled many expts to allow comparison in multi-processor mode
3127      - updated output accordingly
3128      - changed hs94.128x64x5 to use intial T from file rather than use the
3129        random number generator
3130    o add infrastructure in model routines for fizhi and gridalt packages
3131    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
3132    o changes to permit hi-res, cubed-sphere, configuration
3133      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
3134      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
3135      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
3136        of surface winds for the cube
3137      (A verification experiment, based on global_ocean.cs32x15, but with
3138       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
3139       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
3140       complete with example surface forcing files and matlab scripts to look
3141       at the output and compare it with that of global_ocean.cs32x15.)
3142    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
3143       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
3144       to conform to the common rule.
3145    o check-in the first version of the coupler + interfaces for multi-components
3146       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
3147       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
3148       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
3149       - ocean and atmos. share the same horizontal grid (no interpolation).
3150       - exchanges between component and coupler is done in forward_step
3151    o new verification experiment, cpl_aim+ocn:
3152       coupled ocean - AIM atmosphere on cs32 grid.
3153    
3154    checkpoint52d_pre
3155    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
3156    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
3157    
3158    checkpoint52c_post
3159    o Fixing OPTIONS files for use of exf:
3160      - ALLOW_ECCO not needed
3161      - ECCO_CPPOPTIONS.h should not be included from
3162        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
3163        as has been the case in the past
3164      - All cal/exf related options are currently set in
3165        single header file. Should remain so until we
3166        agree on a consistent new policy.
3167    o Removed all CPP options for cal package.
3168      cal has no more CPP options.
3169    o modified STOREs in GAD_ADVECTION
3170    o corrected key comp. for passkey
3171    
3172    checkpoint52b_post
3173    o new version: "thsice" of thermodynamic sea-ice pkg:
3174     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
3175     - modify fluxes but do not change theta directly;
3176     - light cleaning of bulk_force pkg (still needed with thsice).
3177     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
3178       + output_thsice.txt to test thsice & bulk_force pkgs.
3179    o put back grid & coriolis monitor output.
3180    checkpoint52b_pre
3181    
3182    o call "do_the_model_io" at the beginning (=> dump initial state)
3183    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
3184    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
3185      (need info on NUMBER_OF_PTRACERS)
3186    o missing PTRACERS headers in some routines
3187    o default tamc.h in pkg/autodiff supposed to crash
3188      to ensure proper customization
3189    
3190    checkpoint52a_post
3191    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
3192      - moved surfaceTendencyTice from pkg/seaice to main code
3193      - subroutine FREEZE_SURFACE now limits only surface temperature
3194        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
3195        => new output.txt for global_ocean.cs32x15 & global_with_exf
3196      - keep the old version of FREEZE for backward compatibility;
3197        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
3198      - corresponding modifs for TAF directives
3199    o added surface flux output variables to TIMEAVE_STATVARS
3200    o time-averaged output for pkg/ptracers
3201    o fix problem with ECCO-related divided adjoint
3202      snapshot file was missing some ad-variables,
3203      but no warning issued by TAF
3204    
3205    checkpoint52a_pre
3206    o some bug fixes for #undef REAL4_IS_SLOW
3207    
3208    checkpoint52 = ecco_c52_e35
3209    o after testing adjoints of checkpoint51u_post
3210    
3211    checkpoint51u_post
3212    o this is the post-merge tag of the ecco-branch
3213      (needs another clean checkout and re-testing)
3214    o various natl_box_adjoint configs and results
3215      but no input fields
3216    o obcs adjoint not yet merged!
3217    o adding ECCO global 1x1 and 2x2 degree configs
3218    o updated/extended some store directives for seaice
3219    o pkg/ecco now containes ecco-specific part of cost function
3220    o top level routines the_main_loop, forward_step
3221      supersede those in model/src/
3222      previous input data.cost now in data.ecco
3223      (new namelist ecco_cost_nml)
3224    o in ctrl/ cleaned some cross-dependencies and updated CPP options
3225    
3226    checkpoint51t_post
3227    o this is the pre-merge tag of the ecco-branch
3228    
3229    checkpoint51s_post
3230    o cleanup: removed various obsolete #define-s
3231    o pkg/grdchk
3232      - renamed 'ph-grd 3' to 'grad-res'
3233      - merged from ecco-branch
3234        (remaining bug fixes for obcs gradient checks)
3235      - additional high-precision output for testreport
3236        (grep for 'precision_grdchk_result')
3237    
3238    checkpoint51r_post
3239    o cleaned up or removed CPP_OPTIONS.h files
3240    o updated results for some of the tests to reflect the new
3241      optfiles (-ieee: -O0 instead of -O3)
3242    
3243    checkpoint51q_post
3244    o cd_code:
3245      - moved cd_scheme.F -> cd_code_scheme.F
3246      - separate read_checkpoint from cd_code_ini_vars.F
3247      - separated cd_code part from write_checkpoint
3248      - updated AD_SOURCE, generated .flow
3249      - added CD_CODE_VARS.h to the_main_loop
3250      - Moving cd_code specific store dir.s to pkg/cd_code
3251    o ctrl package totally restructured
3252      - pack/unpack now optional and decoupled from
3253        xx_/adxx_ I/O
3254      - ctrl_pack/unpack cleaned
3255        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
3256      - confined inclusion of AD_CONFIG.h to where necessary.
3257    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
3258    
3259    checkpoint51p_post
3260    o create initial cd_code package
3261      - WARNING: the initialization of fields within packages
3262        is broken because INI_FIELDS (where READ_CHECKPOINT is
3263        called) is called *before* PACKAGES_INIT_VARIABLES.
3264        This seems to be backwards since
3265        1) its important to initially zero the entire field including
3266           the "halo" region
3267        2) zeroing needs to be done *before* reading pickup info
3268           and the pickup call might or might not happen in any
3269           particular run
3270      - this needs an overhaul for R2
3271    o cleanup verification/*/code/GMREDI_OPTIONS.h
3272    o cleanup testreport
3273    
3274    checkpoint51o_post
3275    o bringing AD-related verif's up to date with genmake2
3276      - carbon/
3277      - global_ocean.90x40x15/
3278      - hs.94.1x64x5/
3279      - (front_relax/ )
3280    o (more) consistent directory structure for AD-related verif.'s
3281    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
3282    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
3283    o bug fix in find_alpha.F for MDJWF:
3284      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
3285        change rho -> rho-rhoConst
3286      - replace call find_rho to find_rhonum
3287    o initialisation of rFlx extended to full array (required by TAF)
3288      and shifted to thermodynamics
3289    o removed PTRACERS.h in ptracers routine
3290    o added surfacetendencyPtr to S/R parameter list pracers_forcing
3291    o Correcting initialisations for fVerU, fVerV.
3292    o helping TAF to recognize dependency on kUp for
3293      fVerU, fVerV
3294    o Replacing delZ by delR in pkg/ctrl/
3295    checkpoint51o_pre
3296    
3297    o undid all of cp51 pending some cleanups and discussion
3298    o added the [#include "AD_CONFIG.h"] statement to all files that need
3299       it for adjoint/tl #defines
3300     o re-worked the build logic in genmake2 to support AD_CONFIG.h
3301     o removed tools/genmake since it no longer works
3302    
3303    checkpoint51n_post
3304    o modifications to make FREEZE flux visible to pkg/kpp
3305      - moved surfaceTendencyTice from pkg/seaice to main code
3306      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
3307      - subroutine FREEZE now limits only surface temperature
3308        (this means new output.txt for global_ocean.90x40x15,
3309         global_ocean.cs32x15, and global_with_exf)
3310    o added surface flux output variables to TIMEAVE_STATVARS
3311    
3312    checkpoint51n_pre
3313    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
3314    o added [#include "AD_CONFIG.h"] to all files that use the following
3315      defines:
3316      - ALLOW_ADJOINT_RUN
3317      - ALLOW_TANGENTLINEAR_RUN
3318      - ALLOW_ECCO_OPTIMIZATION
3319    
3320    checkpoint51m_post
3321    o incorporating changes to get TAMC/TAF working in genmake2
3322      - added new TAMC/TAF targets to the Makefile
3323      - various cleanups related to package handling
3324      - these changes should have no impact on the forward model
3325    
3326    checkpoint51l_post
3327    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
3328     - faster algorithm for cal_addtime.F
3329     - higher precision arithmetic, where needed
3330     - pkg/exf *startdate variables changed from calendar date to
3331       model integration time
3332    
3333    checkpoint51l_pre
3334    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
3335    o enable to apply restoring on S & T only in a latitude band.
3336    o update output (external_forcing_surf modif. change truncation errors)
3337       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
3338    
3339    checkpoint51k_post
3340    o change default to: useNHMTerms=.FALSE.
3341     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
3342       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
3343     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
3344        exp1, ideal_2D_oce
3345     - change data file of oceanic exp (leave the results unchanged for now)
3346       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
3347    o set gravitySign automatically according to the vertical coordinate used
3348      (and change sign: back to "logical" value: +1 when R increases downward)
3349    o added an include barrier to the default CPP_OPTIONS.h and
3350      removed the #include "PACKAGES_CONFIG.h" from it
3351    o fix a bug in mom_fluxform (from chk51j_post)
3352    
3353    checkpoint51j_post
3354    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
3355    o adjusted some flow directives (dynamics, thermodynamics)
3356    o added cubed-sphere case to test cost function
3357    o heckpoint_lev?_directives.h now include
3358      pkg-specific directives, whenever those are enabled.
3359    o Moving pkg-specific flow directives to corresponding pkg
3360      Moving pkg-specific differentiation list to corresponding pkg
3361      Moving pkg-specific checkpoint-lev storing to corresponding pkg
3362      ---> conventions are
3363           - pkg_ad.flow
3364           - pkg_ad_diff.list
3365           - pkg_ad_check_lev?_dir.h
3366    
3367    checkpoint51i_post
3368    o merge of the branch-genmake2
3369      - knowingly breaks the older genmake
3370      - automatic generation of all ALLOW_${PKG_NAME} defines
3371      - new testreport supersedes older testscript
3372    o large number of package inclusion and header cleanups
3373    checkpoint51i_pre
3374    
3375    o new output for adjoin of global ocean vector invariant
3376    o fix for checkpoint of thermodynamic seaice and bulk_force
3377    o Steph gchem various cleanups
3378    
3379    checkpoint 51h_pre
3380    o fixed some single quotes
3381    o modify gchem pkg to be more versatile
3382    o modifications to clean up dic pkg
3383    o add pkg/cfc
3384    
3385    checkpoint51g_post
3386    o provide links for ARPACK and ADM*TLM
3387    o start removing verification/vero/
3388    o update AD-related stuff
3389      (in particular some IF-statements in model/src/ routines)
3390    o adding to verification/global_ocean.90x40x15/ adjoint of
3391      vector invariant setup
3392    
3393    checkpoint51f_post
3394    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
3395    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
3396      of tracer Green's fucntions for ocean inversion project.
3397    
3398    checkpoint51f_pre
3399    o Added on-the-fly spatial interpolation capability
3400        "USE_EXF_INTERPOLATION" to pkg/exf.
3401      - This is a temporary Cartesian-grid hack until
3402        the super-duper ESMF coupler becomes available.
3403      - See verification/global_with_exf/README for usage example.
3404      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
3405        flags and modified pkg/seaice accordingly.
3406    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
3407        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
3408        non-local transport term.
3409    
3410    checkpoint51e_post
3411    o pkg/mom_vecinv:
3412      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
3413      - add time-ave diagnostic of vorticity advection.
3414    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
3415    o atmospheric geopotential: - include water vapor effect;
3416                                - use p^kappa in p* scaling.
3417    o land pkg: read initial state from files.
3418    o AIM : add stratospheric drag in the upper level
3419    
3420    checkpoint51d_post
3421    o change function ILNBLNK (=> last non-blank char.) to return zero
3422      (instead of the string length) when the string. char is empty
3423    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
3424    o modif's to restore TAMC compatibility
3425      - avoid "_d" constructs in PARAMETER declarations
3426      - avoid interrupting lines by comment lines
3427    o Use cluster local disks for purely local I/O
3428      vs. globally visible disks needed for ctrl stuff
3429      (merged from ecco-branch)
3430      - new active_file_loc... and mdsio_..._loc routines
3431      - affected packages: autodiff, ctrl, grdchk, mdsio
3432    
3433    checkpoint51c_post
3434    o introducing integer flag debugLevel
3435      - debLevZero: suppress all output
3436      - debLevA: standard
3437      - debLevB: equivalent to current debugMode=.TRUE.
3438    o introducing pathname variable mdsioLocalDir for mdsio
3439      that can be specified at runtime
3440      (relevant for cluster I/O to local disk)
3441    `
3442    >>>checkpoint51b_post
3443    adjoint of ptracers
3444    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
3445    o extended state in checkpoint_lev?, etc.
3446    o alternative ctrl/cost with tr1 or ptracer
3447    o new comlev1_bibj_ptracers
3448    o new ptracers.flow
3449    o made ptracers_forcing same as external_forcing_s
3450    o added verification for adjoint with ptracers
3451      - adm. grdchk fail so far
3452      - tlm. grdchk OK
3453      - checked tapelev/comlev recomputations: OK
3454    <<<checkpoint51b_pre
3455    
3456    checkpoint51a_post
3457    o added code for biogeochemistry package
3458      - new pkgs: dic, gchem
3459      - new subroutine in ptracers
3460    o modify code for biogeo packages
3461      - in model/src and pkg/ptracers
3462    
3463    checkpoint51
3464    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
3465      - autodiff, ctrl, exf, grdchk, seaice
3466      kept separate packages
3467      - cost, ecco, obcs
3468    o updating verification/internal_wave, verification/lab_sea
3469      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
3470    
3471    checkpoint50i_post
3472    o Preparing next differentiable checkpoint and sync
3473      of MAIN vs. ecco-branch
3474      - 1st step: this one is differentiable
3475      - 2nd step: next(! not this) checkpoint will have updated packages
3476                  from ecco-branch)
3477    
3478    checkpoint50h_post
3479    o new package "land": provide surface BC for AIM.
3480    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
3481    o AIM: use true log-P extrapolation for near surface temp (= as in
3482        F.Molteni paper) ; update aim.5l_cs output.
3483    o New variable in PARM03 for more flexible pickups
3484    o somewhat cleaned package initialisation sequence for
3485      ctrl/ cost/ ecco/ in packages_... routines
3486    
3487    checkpoint50g_post
3488    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
3489      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
3490      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
3491        made the default because of faster convergence than ADI
3492    
3493    checkpoint50f_post
3494    o exf totally restructured
3495      - replaced all exf_set_ routines by one generic exf_set_gen.F
3496        and made sure it's still differentiable
3497      - split exf_getffields.F into new exf_bulkformulae.F
3498      - exf_inscal_/exf_outscal_ suffixes consistent with field names
3499      - updated adjoint/makefile and relevant verif. accordingly
3500    
3501    checkpoint50f_pre
3502     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
3503          + change Evap over land. (update aim.5l_cs output)
3504     o added missing .cvsignores and made uniform across expts
3505     o changed configuration of tidal_basin_2d expt
3506     o added pkg/debug functions for tracing code in fatal crashes
3507     o tidied pkg/monitor to use MONITOR_OPTIONS.h
3508     o new fn in pkg/monitor to stop model if solution grows too big
3509     o removed lots of single quotes from comments
3510    
3511    checkpoint50e_post
3512    o make KPP work with PTRACERS
3513     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
3514       nearly a copy of kpp_transport_s
3515     - there is no analogue to SurfaceTendencyS, so I have to use
3516       gPtr(of the surface layer) instead
3517    o add a new platform SunFire+mpi (SunFire 15000) to genmake
3518    checkpoint50e_pre
3519    
3520    checkpoint50d_post
3521    o change kpp output from multiple-record state files to single-record state
3522      files analogous to write_state.F
3523    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
3524      analogous to the cg2d-related output.
3525    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
3526      so that writing to internal file fn (with length 512) fails.
3527    checkpoint50d_pre
3528    
3529    checkpoint50c_post
3530    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
3531    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
3532    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
3533    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
3534    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
3535    
3536    checkpoint50c_pre
3537    Merging from release1_p13:
3538    o bug fix for pkg/seaice dynamic solver
3539    o Added SEAICE_initialHEFF to pkg/seaice
3540    
3541    checkpoint50b_post
3542    o store u*,v* in gU,V instead of in guNm1,gvNm1
3543    o in order to put the momForcing out of the Adams-Bashforth:
3544      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
3545      to timestep.F
3546    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
3547    o re-generate output for highly sensitive test-exp:
3548       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
3549    
3550    checkpoint50b_pre
3551    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
3552    o corrected CPP option mismatch in exf_Bulk... functions for case
3553      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
3554    
3555    checkpoint50a_post
3556    o Bug fix for merging between c50 and KPP.
3557      ikey was passed from thermodynamics to kpp_calc via
3558      common block rather than being recomputed in kpp_calc,
3559      in contradiction with new key itdkey.
3560      New key ikppkey created, and tamc.h headers updated.
3561    
3562    checkpoint50
3563    - 2nd step of merge with ecco-branch:
3564      merge changes in ecco-branch back into main trunk
3565    - bug fix in find_alpha
3566    - more storing in gmredi_calc_tensor.F, kpp_routines.F
3567    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
3568    - merged some sliced AD support routines
3569    
3570    checkpoint49
3571    merged from ecco-branch:
3572    o exf:
3573      - Enable initialisation of forcing fields to constant
3574        (runtime) values.
3575      - in exf_getffields.F
3576        Reduce i-/j-loop to interior domain, discarding overlaps.
3577        That also fixes wrong TAF-key computations for key_1, key_2
3578        with bulf formulae.
3579      - exf_init.F modify #ifdef for exf_init_evap
3580      - exf_getffieldrec.F, ctrl_getrec.F
3581        The following INT-usages are not safe:
3582          fldsecs  = int(fldsecs/fldperiod)*fldperiod
3583          fldcount = int(fldsecs/fldperiod) + 1
3584        and were modified.
3585    o autodiff: checkpoint_lev...
3586      - updated storing for bulk formulae (some arrays were missing)
3587      - added state for seaice package
3588      - synchronized with main branch
3589    o DIVA:
3590      Modif.s in
3591      - the_main_loop.F
3592      - the_model_main.F
3593      and added cost_final_restore.F cost_final_store.F
3594      o With these changes, it is possible to fully separate
3595        the first forward run to compute the cost function (mdthe_main_loop)
3596        and adjoint runs over individual DIVA intervals (adthe_main_loop)
3597        into separate model executions.
3598        This enables better tuning of DIVA to given queue sizes.
3599      o Loss of cost function value in consecutive DIVA runs is
3600        fixed by storing to 'costfinal' file.
3601      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
3602        beginning/end of adjoint integration is accounted for.
3603      The current changes apply to TAF-1.4.26.
3604      TAF has one remaining bug, requiring one manual change
3605      (see MITgcm manual).
3606    o cal: synchronized between MAIN and ecco-branch
3607    
3608    checkpoint48i_post
3609    o Changes to restore differentiability of code w.r.t. previous tag
3610      (mostly adding new routines to make list and replacing
3611      pressure by totPhiHyd).
3612    o Updated and merged grdchk package
3613      - has both ADM and TLM checks
3614      - works for single- and multi-proc.
3615      - output cleaned
3616      - worked successfully for parallel DIVA
3617    o genmake:
3618      - Adding -platform=SP4
3619      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
3620    o Modif. for DIVA:
3621      ctrl_unpack should not be called in intermediate DIVA interval.
3622      (similar thing would apply for active files such as
3623      tbar, sbar, psbar, which should not be reinitialised;
3624      only relevant for ecco-branch)
3625    
3626    checkpoint48h_post
3627    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
3628    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
3629    o Added SEAICE_initialHEFF to pkg/seaice
3630    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
3631    
3632    checkpoint48g_post
3633    --- EOS:
3634    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
3635      store total Potential in totPhyHyd for diagnostics & EOS.
3636    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
3637    --- Pressure/geopotential gradient:
3638    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
3639    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
3640      ( changes results of global_ocean_pressure )
3641    o NLFS + z-coord.: add eta*Rho' contribution.
3642    o accurate phiHyd when using interface-W at the middle between 2 centers
3643     ( changes results of ideal_2D_oce )
3644    o includes r* 2nd term in potential gradient.
3645    
3646    checkpoint48f_post
3647    Merging from release1_p12:
3648    o Modifications for using pkg/exf with pkg/seaice
3649      - improved description of the various forcing configurations
3650      - added basic radiation bulk formulae to pkg/exf
3651      - units/sign fix for evap computation in exf_getffields.F
3652      - updated verification/global_with_exf/results/output.txt
3653    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
3654      (SBO) core products, including oceanic mass, center-of-mass,
3655      angular, and bottom pressure (see pkg/sbo/README.sbo).
3656    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
3657      to avoid negative values in shallow regions.
3658      - updated verification/natl_box/results/output.txt
3659      - updated verification/lab_sea/results/output.txt
3660    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
3661    o Added useSingleCpuIO option (see PARAMS.h).
3662    o Updated useSingleCpuIO option in mdsio_writefield.F to
3663      work with multi-field files, e.g., for single-file pickup.
3664    o pkg/seaice:
3665      - bug fix in growth.F: QNET for no shortwave case
3666      - added HeffFile for specifying initial sea-ice thickness
3667      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
3668    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
3669      kpp_transport_t.F, forward_step.F, and the_main_loop.F
3670    o pkg/seaice:
3671      - adjoint-friendly modifications
3672      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
3673    
3674    checkpoint48e_post
3675    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
3676    o dynamics: change definition of computational domain & adapt mom_fluxform
3677      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
3678    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
3679        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
3680        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
3681        global_ocean.90x40x15 global_with_exf global_ocean_pressure
3682        inverted_barometer solid-body.cs-32x32x1
3683      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
3684    
3685    checkpoint48d_post
3686    o in preparation for r*:
3687     a) use pre-computed gradient of hydrostatic potential:
3688        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
3689     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
3690        => affects results of glob_oce_pressure (different truncation error)  
3691      update output.txt of ideal_2D_oce & global_ocean_pressure
3692    
3693    checkpoint48d_pre
3694    o in preparation for r*:
3695      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
3696      pass the 2 comp. of the grad. as arguments to momentum S/R.
3697      but for the moment, only used if it does not change the results.
3698    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
3699    
3700    checkpoint48c_post
3701    Modifications in treatment of initial flux forcing controls
3702    to avoid extra storing of flux fields.
3703    
3704    checkpoint48c_pre
3705    o Added tidal_basin_2d experiment (currently 1D!)
3706    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
3707    
3708    checkpoint48b_post
3709    o r* coordinate added in #ifdef NONLIN_FRSURF block.
3710     (modification to pressure gradient not yet implemented)
3711    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
3712      (for U & V) that are used for vertical advection of momentum.
3713    
3714    checkpoint48a_post
3715    o In preparation for r*, use temp. array to compute vertical transport
3716       in flux-form momentum pkg. => change results of few test-exp.
3717      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
3718                        lab_sea, natl_box & plume_on_slope
3719    
3720    checkpoint48
3721    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
3722    
3723    checkpoint47j_post
3724    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
3725    o moved adexch from forward_step to addummy_in_stepping
3726    o added exch in ctrl_map_...
3727    o aveFreq.=0. at end of cost_final to avoid overwrite in
3728      reverse checkpointing loop
3729    o Yet more changes in gmredi:
3730      * adgmredi_calc_tensor
3731        avoiding all recomputation of gmredi_slope_limit
3732      * adgmredi_x/y/rtransport
3733        added flag for excessive storing to avoid recomp. of
3734        u/v/rtans, dTdx/y/z
3735        -> this is not really necessary and very memory-consuming
3736      * adgmredi_slope_psi:
3737        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
3738      * gmredi_slope_limit
3739        re-activated full calculation of taperfct for case 'ac02'
3740    o updating verification/ adjoints of carbon, global_ocean.90x40x15
3741    
3742    checkpoint47i_post
3743    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
3744    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
3745      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
3746    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
3747    o gmredi: fix few bugs.
3748    
3749    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
3750    This will be a good checkpoint to plug into the ecco-branch.
3751    o few modif.'s to get latest version adjointed
3752      (mainly kick out code in ini_linear_phisurf)
3753    o modif's to run adjoint with exactConserv
3754    o case GM_BOLUS_ADVEC should be cleaned
3755      S/R gmredi_slope_psi should be cleaned
3756    o verification/carbon now has exactConserv=.TRUE.
3757    
3758    checkpoint47g_post
3759    o time-average AIM output: becomes independent from statvars time-average
3760      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
3761    o After TAF bug fix:
3762      Tested adjoint of gmredi package.
3763      Tests were done with checkpoint47 rather than with latest
3764      checkpoint47f_post since the latter is broken for the adjoint
3765      verification/carbon/ contains both ADM and TLM gradient checks.
3766    Here they are, before they get changed/lost/stolen.
3767    Mostly modif.'s to fix numerical sensitivities.
3768    Gradient checks OK for
3769    - GM_taper_scheme:
3770      * clipping
3771      * ac02
3772      * linear
3773      * glw91
3774      * dm95
3775      * ldd97
3776    - GMREDI_OPTIONS:
3777      * GM_VISBECK_VARIABLE_K
3778      * GM_NON_UNITY_DIAGONAL
3779      * GM_EXTRA_DIAGONAL
3780      * GM_BOLUS_ADVEC
3781    in conjunction with data.gmredi parameters to be checked in
3782    in a few minutes under verification/carbon/code/
3783    
3784    checkpoint47f_post
3785    Merging from release1_p10:
3786    o modifications for using pkg/exf with pkg/seaice
3787      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
3788        and SEAICE_EXTERNAL_FLUXES
3789      - pkg/exf CPP options EXF_READ_EVAP and
3790        EXF_NO_BULK_COMPUTATIONS
3791      - usage examples are Experiments 8 and 9 in
3792        verification/lab_sea/README
3793      - verification/lab_sea default experiment now uses
3794        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
3795    
3796    checkpoint47e_post
3797    o created a tag prior to creating a branch
3798    
3799    checkpoint47d_post
3800    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
3801      at the bottom boundary had an erroneous half slip boundary condition
3802    o added bottom drag and no slip boundary condition capabilities to
3803      oceanic pressure coordinates code
3804    o added new verification experiment global_ocean_pressure, this experiment is
3805      also described in the tutorial section of the manual
3806    checkpoint47d_pre
3807    
3808    checkpoint47c_post
3809    o Added a verification experiment for a global cubed-sphere ocean run
3810      -  verification/global_ocean.cubed32x32x30
3811      -  uses pkg/therm_seaice and pkg/bulk_forcing
3812    
3813    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
3814    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
3815      when using P-coordinate; only implemented for atmospheric config.
3816    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
3817      NOTES: requires option NONLIN_FRSURF to be "#define".
3818    o update advect_xz/results/output.txt (left from checkpoint44g_post)
3819    
3820    checkpoint47b_post
3821    Merging from release1_p9:
3822    o pkg/seaice
3823      - removed GOTO's and added taf directives
3824      - double precision constants to reduce the g77 (Linux)
3825        to F77 (SGI) differences reported in release1_p8
3826    o tools/genmake
3827      - added SGI options
3828    o verification/testscript
3829      - updated to that of checkpoint47a_post
3830    o verification/global_ocean.90x40x15/input/eedata
3831      - modified for SGI f77 compatibility
3832    o verification/lab_sea
3833      - added description of sea-ice model
3834      - added missing matlab routines
3835      - added test of thermodynamics parallelization
3836    
3837    checkpoint47a_post
3838    o new pkg: aim_v23
3839     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
3840       for now, keep the same surface forcing as before.
3841     - Part-Cell implemented into AIM; check that Heat & Water are conserved
3842     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
3843     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
3844    o add diagnostic of surface correction term in monitor output
3845    
3846    o bulk_force and therm_seaice
3847    - Two packages:  bulk_force (Bulk forcing)
3848      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
3849    - Earlier integration from Stephaine Dutkiewicz
3850      and Patrick Heimbach.
3851    - Two ifdef statements for compile time,
3852       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
3853    
3854    checkpoint47
3855    differentiable version of checkpoint46n_post
3856    o bug fix in quasihydrostaticterms
3857    o * "clean" adjoint code (in terms of extensive recomputations)
3858        can now be obtained for all GMREDI options (i.e. for
3859        - GM_VISBECK_VARIABLE_K
3860        - GM_NON_UNITY_DIAGONAL
3861        - GM_EXTRA_DIAGONAL
3862        - GM_BOLUS_ADVEC )
3863      * However, wrong gradient check problem remains unsolved.
3864      * New CPP options have been introduced for different
3865        tapering schemes
3866    o external_fields_load now part of differentiation list
3867    o pressure needs multiple storing;
3868      would be nice to have store_pressure at beginning or
3869      end of forward_step, e.g. by having phiHyd global (5-dim.)
3870      (NB: pressure is needed for certain cases in find_rho,
3871      which is also invoked through convective_adjustment).
3872    o recomputations in find_rho for cases
3873     'JMD95'/'UNESCO' or 'MDJWF' are OK.
3874    o #define ATMOSPHERIC_LOADING should be differentiable
3875    o ini_forcing shifted to begining of initialise_varia
3876    o Incorporating QNVS line search routines into MITgcm
3877      (this is separate code, and therefore not under pkg)
3878      lsopt/, optim/
3879    o Updated verification/carbon/
3880      - #define GM_VISBECK_VARIABLE_K
3881      - GM_taper_scheme    = 'ldd97'    
3882    
3883    checkpoint46n_post
3884    Merging from release1_p8:
3885    o verification/natl_box:
3886      updating new external_fields_load routine
3887    o New package: pkg/seaice
3888      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
3889      The sea-ice code is based on Hibler (1979-1980).
3890      Two sea-ice dynamic solvers, ADI and LSR, are included.
3891      In addition to computing prognostic sea-ice variables and diagnosing
3892      the forcing/external data fields that drive the ocean model,
3893      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
3894      The implied surface heat flux is then stored in variable
3895      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
3896      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
3897      non-local transport term.  Because this call precedes model
3898      thermodynamics, temperature under sea-ice may not be "exactly" at
3899      the freezing point by the time theta is dumped or time-averaged.
3900      N.B.: fairly large differences in accuracy occur across
3901            different platforms/compilers; comparison between
3902            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
3903            generated output gives:
3904       T           S           U           V
3905      C D M    c        m  s        m  s        m  s        m  s
3906      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
3907      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
3908      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
3909    
3910      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
3911    o GAD:
3912      - generated new common blocks to account for call of
3913        same gad routines with differing traceridentities
3914        (needed to modify tracerIdentity indices in GAD.h)
3915      - generated separate common blocks for case useCubedSphereExchange
3916        (Department of Futurology)
3917      - parameter lists to gmredi_?transport: added tracerIdentity
3918      - added new key indices to tamc.h
3919    o external_fields_load:
3920      - added this routine to TAF list
3921      - needed to make some common blocks global and additional storing
3922        along the same lines as exf package (checkpoint_lev?_directives.h)
3923    o exf:
3924      updated external forcing package
3925      - bug fixes carried over from ecco-branch
3926        (missing OBCS_OPTIONS.h in two routines)
3927      - enable easy to use "no forcing".
3928      - added exf I/O for atmospheric loading
3929      - added exf I/O for runoff data
3930      - transfered scaling between exf <-> MITgcm to exf namelist
3931    o Adding new verification experiment global_with_exf.
3932      This verification experiment is almost identical to the
3933      global_ocean.90x40x15 experiment, except that it uses
3934      the exf (and cal) package instead of the
3935      external_fields_load routine (cf README file).
3936    
3937    checkpoint46m_post
3938    o modified testscript to return -- when there are no lines of "%MON" output
3939    o added new flag "quasiHydrostatic" for QH mode
3940      and new routine quasihydrostaticterms()
3941    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
3942      New routine: mom_u_coriolis_nh()
3943    o fixed sign of non-hydrostatic metric terms in u and v equations.
3944      Depend on correct sign of gravitySign.
3945    o added work.pc* to .cvsignore in aim directories using ifc
3946    o introduced flag for controllin non-hydrostatic metric terms
3947    o removed gravitySign from PARM04
3948    o switched to g77/ifc from pgf77 in aim experiments
3949    
3950    checkpoint46l_post
3951    o made convective adjustment work with pressure coordinates:
3952     - changed the direction of k-loop in convective_adjustment.F for the
3953       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
3954     - adjusted the reference pressure k-index in convective_adjustment.F
3955     - adjusted the convection condition in convect.F (in analogy to
3956       calc_ivdc.F)
3957     - convective_adjustment no longer computes anything on the halos
3958     - removed the warnings about negative salinity from find_rho.F and
3959       find_alpha.F; instead the new routine look_for_neg_salinity, called
3960       at the beginning of find_rho, find_alpha, and find_beta, does a
3961       check of the entire slice, if CPP-option
3962       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
3963    checkpoint46l_pre
3964    
3965    checkpoint46k_post
3966    o fixed the verification/global_ocean.90x40x15 experiment:
3967     - new bathymetry (the world according to A., JMC, and M.)
3968     - new initial fields and forcing fields (*.bin files)
3969     - new POLY3.COEFFS (for the next release one should switch to a full
3970       equation of state: JMD95P or MDJWF)
3971     - fixed several errors and redundancies in the data file
3972     - experiment uses looped cells
3973     - added matlab directory with diagnostic scripts for plotting of output
3974    
3975    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
3976     - read AIM physics parameters from a file (data.aimphys)
3977     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
3978    
3979    checkpoint46j_post
3980    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
3981    o move wVel computation at the end of the time step, in S/R integr_continuity
3982    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
3983    o update timeave pkg for wVel diagnostic.
3984    checkpoint46j_pre
3985    
3986    checkpoint46i_post
3987    o Clean up AIM package (and keep the results unchanged):
3988      include CPP_OPTION and use IMPLICT NONE in all routines ;
3989      declare all the variables _RL ; use _d 0 for all numerical constants.
3990      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
3991    
3992    checkpoint46h_post
3993    o cleaned up the use of rhoNil and rhoConst.
3994      - rhoNil should only appear in the LINEAR equation of state, everywhere
3995        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
3996        and the dynamical equations are all divided by rhoConst
3997    o introduced new parameter rhoConstFresh, a reference density of fresh
3998      water, to remove the fresh water flux's dependence on rhoNil. The default
3999      value is 999.8 kg/m^3
4000    o cleanup up external_forcing.F and external_forcing_surf.F
4001      - can now be used by both OCEANIC and OCEANICP
4002    checkpoint46h_pre
4003    
4004     Added code to convert surface volume flux (fresh water) into
4005     a mass flux when using P coordinates in the ocean (OCEANICP).
4006     Note: It assumes you have set rho0=rhoConst=density of fresh water.
4007    
4008    checkpoint46g_post
4009    o Include a new diagnostic variable phiHydLow for the ocean model
4010      - in z-coordinates, it is the bottom pressure anomaly
4011      - in p-coordinates, it is the sea surface elevation
4012      - in both cases, these variable have global drift, reflecting the mass
4013        drift in z-coordinates and the volume drift in p-coordinates
4014      - included time averaging for phiHydLow, be aware of the drift!
4015    o depth-dependent computation of Bo_surf for pressure coordinates
4016      in the ocean (buoyancyRelation='OCEANICP')
4017      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
4018        Theta, Salinity, and Pressure in the parameter list. This routine is
4019        presently contained in find_rho.F. This routine does not give the
4020        correct density for 'POLY3', which would be a z-dependent reference
4021        density.
4022    o cleaned up find_rho
4023      - removed obsolete 'eqn' from the parameter list.
4024    o added two new verification experiments: gop and goz
4025      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
4026    checkpoint46g_pre
4027    
4028    checkpoint46f_post
4029    o Enable tangent linear (forward mode) gradient checks:
4030      - extended active file handling to g_... files
4031      - added TANGENT_SIMULATION to theSimulationMode
4032      - extended grdchk package accordingly
4033    o added tangent linear setup in verification/carbon/code_ftl
4034    o added adjoint setup in verification/front_relax/code_ad
4035    
4036    checkpoint46e_post
4037    o Added new equation of state -> MDJWF
4038      - EOS of McDougall et al., 2002, JAOT, submitted
4039      - caveat: the equation of state is only valid for a smaller (more
4040        realistic?) range of values than JMD95P/Z and UNESCO
4041      - added masks to the calculation of pressure in store_pressure
4042      - added more check values for density in check_eos (ini_eos.F), some of
4043        the old check values are out of the range of the MDJWF-eos, so don't
4044        expect perfect matches for those
4045    checkpoint46e_pre
4046    
4047    checkpoint46d_post
4048    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
4049      'OCEANICP', also initialised field pressure correctly in ini_eos in the
4050      case of pressure coordinates. eosType='JMD95Z' in
4051      combination with buoyancyRelation='OCEANICP' now causes an error.
4052    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
4053      in find_alpha/beta.
4054    checkpoint46d_pre
4055    
4056    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
4057      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
4058    
4059    checkpoint46c_post
4060    o Changes necessary for ocean in p-coordinates
4061     -  Added new buoyancy relation = 'OCEANICP'
4062     -  Added new parameters = gravitySign (this used to be contained inside
4063        the factor dRdZ which I added when we first switched to R coordinates).
4064     X GM/Redi is not compatible (yet)
4065     X bottom drag and no-slip need to be debugged.
4066    checkpoint46c_pre
4067    
4068    checkpoint46b_post
4069    o Added new equation of state -> JMD95Z and JMD95P
4070      - EOS of Jackett and McDougall, 1995, JAOT
4071      - moved all EOS parameters into EOS.h
4072      - new routines ini_eos.F, store_pressure.F
4073    o Added UNESCO EOS, but not recommended because it requires
4074      in-situ temperature (see JMD95)
4075    o Modified formatting for knudsen2.f in utils/knudsen2 and added
4076      unesco.f to be used with POLY3
4077    checkpoint46b_pre
4078    
4079    checkpoint46a_post
4080    o Added (atmospheric) pressure loading
4081      - new field in FFIELDS.h, etc...
4082      - new cpp flag ATMOSPHERIC_LOADING
4083    o Changed hFacC to _hFacC in calc_phi_hyd.F
4084    o Added SHORTWAVE_HEATING to some files for consistency
4085    checkpoint46a_pre
4086    
4087    checkpoint46
4088    further merges from release1_p5
4089    o new ctrl package
4090      - adopted from ECCO environment to enable optimization
4091      - added Eliassen Palm fluxes to controls
4092    o added Eliassen Palm flux controls to gradient check package
4093    o cost package
4094      - Compatible with new ctrl package
4095      - added Eliassen Palm cost hooks
4096      - modif's of existing cost functions
4097    o Adjoint-related bug fixes in kpp:
4098      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
4099      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
4100    o autodiff package
4101      - flow directives:
4102        + new for S/R do_the_model_io
4103        + enhanced for S/R checkpoint
4104        + new gmredi.flow
4105      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
4106        disable adcommon.h/g_common.h by default.
4107      - fixed problem for adjoint of global_max
4108    o modified verification/carbon/
4109    o New setup for adjoint of global_ocean
4110    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
4111    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
4112    o incorporated hooks for sponge layer code (external_forcing.F)
4113    
4114    checkpoint45d_post
4115    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
4116    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
4117      (affects plume_on_slope "cg2d" output)
4118    o add new parameter deltaTfreesurf for free-surface time stepping
4119    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
4120    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
4121    o change phiMin in exp1 (to agree with documentation)
4122    o add new flags:
4123     - T,S forcing inside/outside Adams-Bashforth
4124     - turn off temp,salt advection and/or forcing
4125     - for each tracer, define internal flag for multiDimAdvection & A-B
4126    o monitor: change definition of KE to check conservation of Energy
4127    
4128    checkpoint45c_post
4129    o Removed f90 comments ("!")
4130    o Modified initialisations to enable exf package for MITgcm
4131      (without invoking ECCO_PACKAGE).
4132    o modifications to gradient check package (Martin Losch)
4133      - enable centered differences
4134      - modified format of standard output
4135    
4136    checkpoint45b_post
4137    o cleaned exchange calls in cg2d
4138    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
4139    o included CPP option SINGLE_LAYER_MODE in thermodynamics
4140      to configure barotropic setup (Martin Losch)
4141    o moved some initialisations within bi,bj loop in dynamics
4142      (TAF flow dependency)
4143    o in initialise_varia, moved call packages_init_variables
4144      before convective_adjustment_init
4145      (corresponding adjustment of TAF tape initialisation).
4146    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
4147    
4148    checkpoint45a_post
4149    o compute Rho over the whole domain (extend iMin,jMin indices)
4150    o specific exchange for X-slice domain (case Ny=1)
4151    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
4152    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
4153    
4154    checkpoint44h_post = checkpoint45
4155    o Fix to restore differentiability:
4156      place at which packages_init_variables is called in
4157      initialise_varia is crucial for reverse control flow.
4158    o modifications in GMRedi to enable stable adjoint
4159      (corresponding modif's in thermodynamics, dynamics)
4160    o added missing hook for sponge layer code in external_forcing
4161    o modified test cost functions
4162    o storing in gad_advection (plus removal of write(0,*)!
4163    o missing headers TR1.h added in convective_adjustment routines
4164    o errorMessageUnit set non-equal zero in eeboot
4165      (conflict on some platforms, e.g. IBM SP3)
4166    o modified carbon verif.
4167    
4168    checkpoint44h_pre
4169    o vertical grid option: allow to put the Interface at the middle between
4170      2 cell-centers ; replace delZ in pkg/kpp by drF.
4171    o GM Advective form: Tracers are advected using the residual transport (=
4172      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
4173    
4174    checkpoint44g_post
4175    o fix surface correction term in multiDimAdvection (affects plume_on_slope
4176      results) ; ifdef missing in thermodynamics.F
4177    
4178    checkpoint44f_pre,checkpoint44f_post
4179    o added PTRACERS package
4180      This allows an arbitrary number of passive tracers to be integrated
4181      forward simultaneously with the dynamicaly model.
4182      + Implemented so far:
4183        - basic forward algorithm (time-stepping, advection, diffusion, convection)
4184        - I/O and checkpointing
4185        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
4186      + Not implemented so far:
4187        - KPP
4188        - OBCS
4189      + No specific example supplied (yet) but global_ocean.90x40x15 has the
4190        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
4191        line in data.pkg.
4192      + This package is disabled by default since it increases storage.
4193    
4194    
4195    o testscript: added -cleanup option
4196    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
4197                 b) enable to filter 2D fields.
4198    
4199    checkpoint44e_pre,post
4200    o re-wrote convective adjustment to use pre-calculated weights
4201      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
4202      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
4203      Original calls to convect() still in place.
4204    
4205    chkpt44d_pre,post
4206    o added missing EXCLUDE_MONITOR flags
4207    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
4208      (incompatible typ in MIN/MAX expressions caused problems
4209      on IBM SP3)
4210    o in genmake added variable MAKEDEPEND
4211      plus resetting for case SunOS
4212    o added timer_stats.c routine for IBM SP3
4213    o removed variables in dynamics
4214    !!! I forgot to create tag chkpt44d_pre !!!
4215    !!! But chkpt44d_pre = chkpt44c_post    !!!
4216    
4217    o real fresh water flux implemented with non-linear free-surface.
4218    
4219    chkpt44c_pre,post
4220    o few fix (mask in shap_s2, EmPmR in external_field_load,
4221      USE_NATURAL_BCS in solve_for_P);
4222    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
4223    
4224    checkpoint44b_pre/_post
4225    o merge of relevant stuff from the ecco-branch:
4226      - genmake: removed $S64 overwrite for case SunOS
4227      - pkg/exf: update and corrections for field swapping and obcs
4228      - pkg/ecco: parameter lists for the_model_main, the_main_loop
4229                  harmonized between ECCO and MITgcm
4230      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
4231                      updated checkpointing_lev... lists for obcs
4232      - model/src: minor changes in forward_step, plot_field
4233                   added directive for divided adjoint in the_main_loop
4234      - pkg/mdsio: added mdsio_gl_slice
4235    
4236    o check parameters & config (chkpt44a_pre,post)
4237    o OBC and NonLin_FrSurf.
4238    
4239    checkpoint44
4240    o fix bug in mom_vi_del2uv
4241    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
4242    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
4243    o update AIM experiments (NCEP input files)
4244    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
4245    o added some stuff for AD
4246    
4247    checkpoint43
4248    o added two new advection tests
4249    o added global 4x4 degree ocean test
4250    o added test of H&S94 with free surface on cube
4251    o some final mods for gradient check, adjoint,...
4252    
4253    checkpoint42
4254      Fixed AD-related problems:
4255    o Store directives up-to-date with re-arranged Adams-Bashforth
4256      (mainly thermodynamics.F)
4257    o New store directives for multi-dim. advection schemes
4258      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
4259      * new common block and key passkey
4260      (mainly gad_advection.F)
4261    o Modified store directives for split of dynamics/thermodynamics
4262      for the case ALLOW_KPP
4263    o Cleaned argument list for timestep_tracer.F
4264    
4265    checkpoint41
4266    o re-formatted/added comments in prologues of key subroutines
4267      to work with protex
4268    
4269    checkpoint40
4270    o moved calc_gs, calc_gt and calc_tr1 back to model/src
4271    o added FLT (floats) package from Arne along with demo. experiment
4272    o re-arranged Adams-Bashforth scheme for tracers to allow easier
4273      implementation of forward-in-time forcing terms
4274    o more mods for non-linear free-surface including new variable
4275    o modified multi-dim method to work on cube
4276    o bug fix in KPP (from DM)
4277    
4278    checkpoint40pre9
4279    o added DST advection schemes
4280    o fix MPI bug on SGI's
4281    o modifications for non-linear free-surface
4282    o fixed conditionals for fixed flow/passive tracer only mode
4283    o added tension/strain form of stress tensor
4284    o changes to commenting of arguments for TAF/TAMC
4285    o added/updated many matlab scripts
4286    o added multi-dimensional advection method for tracers
4287      
4288    checkpoint40pre8
4289    o new package rw/
4290      Added method for dumping intermediate local arrays:
4291      mdsio_writetile - same as mdsio_writefield except works from inside
4292                        bi,bj loop
4293      mdsio_writelocal - same as mdsio_writetile except works for local
4294                         arrays
4295      write_local_r? - higher-level wrapper for mdsio_writelocal
4296      Controlled by diagFreq. Defaults to zero (ie. no dumps)
4297      Example given at end of mom_vecinv.F that dumps some local arrays.
4298    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
4299      control flux-form versus vector invariant code.
4300      Switch is runtime flag vectorInvariantMomentum (defaults to false)
4301      or genmake -DISABLE ...
4302    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
4303      (additional storing is now needed for case vecinv;
4304      currently nothing implemented to switch this storing off
4305      in case fluxform is used since no CPP flag available).
4306    
4307    checkpoint40pre7
4308    o bug fix in dynamics.F
4309      calc_viscosity called before k=1,Nr loop.
4310    o added some #ifdef's ALLOW_PASSIVE_TRACER
4311    o cleaned initialisations in ctrl_map_ini
4312      related to TAF
4313    
4314    checkpoint40pre6
4315    o split dynamics into thermodynamics & dynamics
4316    o corresponding split of calc_diffusivity into
4317      calc_diffusivity, calc_viscosity
4318      (kpp_calc_diff, kpp_calc_visc).
4319    o Added diffkr, kapgm to control variables
4320    o bug fix in gmredi_slope_limit for ldd97
4321    
4322    checkpoint40pre5
4323    o proper initialization of Adams-Bashforth time stepping
4324      + uses forward step for very first step of model (iter=0)
4325    o re-generated *all* output since almost all output is modified by this
4326      change (sorry but we've been putting this one off for about 2 years)
4327      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
4328        *not* regenerated since they are already out of date and I don't
4329        want to create the impression that they are suddenly working.
4330    o removed KAP stuff for DEC's
4331    o modified/added many .cvsignore files in */code and */input
4332    o added new expt "solid-body.cs-32x32x1"
4333      + this uses an alternative form of ini_curvilinear_grid.F which
4334        is not necessarily any better than the current one...
4335    
4336    checkpoint40pre4
4337    o added re-initialisations of utrans,vtrans,rtrans in
4338      calc_common_factors which are crucial for TAF.
4339    o extended iMin,jMin range for calc_common_factors,
4340      calc_diffusivity
4341    o added option ALLOW_PASSIVE_TRACER
4342    o a few minor updates and fixes
4343    
4344    checkpoint40pre3
4345    o created calc_gtr1.F for gad package
4346    o split the_main_loop and re-introduced forward_step
4347    o some recomputations of nIter0 for TAMC
4348    
4349    checkpoint40pre2
4350    o Updated to latest branch of AJA, JMC
4351    o Added gradient check package
4352    o Added routines for passive tracer handling
4353    o Added carbon sequestration sensitivity experiment
4354    
4355    checkpoint39
4356     o Modifications and fixes to support TAMC
4357       (mainly missing or wrong directives)
4358     o Corrected common blocks when fooling TAMC to produce adjoint I/O
4359       in addummy_in_stepping
4360     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
4361     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
4362     o Included following packages:
4363       cal: calendar
4364       exf: external forcing
4365       ecco: essential routines to control use of cal, exf
4366             (NB: this is not the full ECCO environment)
4367     o disabled some packages by default in genmake
4368    
4369    checkpoint38
4370     o see notes_c37_adj.txt
4371     o corrected wrong layer index in external_forcing_t
4372     o replaced the_main_loop/forward_step by the_main_loop
4373     o removed forceoutput from write_state
4374       (replaced criteria for initial/final state)
4375     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
4376    
4377    checkpoint37
4378     o mdsio.F routine split and packaged in pkg/mdsio
4379       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
4380        used unless genmake -disable=mdsio)
4381     o allow a more precise surface-geopotential gradient for the atmosphere
4382       taking into account the change in space of Alpha (=1/rho) at the surface.
4383     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
4384       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
4385     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
4386       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
4387       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
4388     o Time-Average diagnostics defined as a pseudo package "timeave".
4389     o pickup files : old pickup (before c35) did not work with new code (c35
4390       and after) unless activating 2 commented lines in initialise-varia.
4391     o Non-Hydrostatic pickup file Pb fixed.
4392     o bug with Rigid-lid version (since c35) fixed.  
4393    
4394    checkpoint36
4395     o implement Crank-Nickelson barotropic time-stepping
4396     o recover Time-Average diagnostics
4397     o fix Pb in checkpoint (PR#19)
4398     o AIM become a standard package ; clean unused CPP_kees
4399    
4400    checkpoint35
4401     o subtantial rewrite of dynamics.f
4402     o allows staggered time-stepping
4403     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
4404     o added bottom drag (linear + quadratic)
4405    
4406  checkpoint34  checkpoint34
4407   o Modified exchange routines for correct reverse simulation.   o Modified exchange routines for correct reverse simulation.
4408   o Added verification output to comply with bug fix in impldiff.F   o Added verification output to comply with bug fix in impldiff.F

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