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revision 1.50 by adcroft, Thu Sep 27 14:24:19 2001 UTC revision 1.1164 by mlosch, Wed Sep 30 16:03:49 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 ctrl
8     - make obcs as control parameter work also with useSingleCPUio
9     - replace a few sny and snx by Ny and Nx to be consistent with
10       ctrl_set_globfld_x/yz.F
11    o pkg seaice
12     - re-introduce global field frWtrAtm for the case of
13       ALLOW_MEAN_SFLUX_COST_CONTRIBUTION defined (SEAICE.h, seaice_growth.F)
14     - catch the case of an empty filename in seaice_cost_init_fixed.F
15    o pkg ecco:
16     - small bug fixes in the_main_loop
17      . fix order of monitor arguments
18      . change SEAICE_MULTILEVEL to SEAICE_MULTICATEGORY
19      . move include DYNVARS.h up outside the ALLOW_AUTODIFF_TAMC block so
20        that ALLOW_ECCO_FORWARD_RUN works with NONLIN_FRSURF
21     - replace cos(yc*deg2rad) by _rA in cost_mean_heat/saltflux.F, fix the
22       imbalance diagnostics for wmean_h/sflux = 0
23     - add actual values to f_obcsn/s/w/e in ecco_cost_final.F
24     - catch the case of empty filenames in ecco_cost_init_fixed.F
25       and ecco_readparms.F
26     - fix the logic of wsalt=0.and.wsalt2=0 to wsalt=0.or.wsalt2=0 (and theta)
27       to make this statement meaningfull in ecco_cost_weights.F
28    o pkg zonal_filt:
29      - change ZONAL_FILTER S/R interface (allows to filter 2-D fields)
30      - when using rStar, filter uVel*hFacW instead of uVel
31       (tested without topography: fix a Pb of growing instability with NLFS)
32    o pkg/aim/thsice:
33     -Add capacity to read a Q-Flux to be applied in slab-mixed layer thsice_slab_ocean.F
34      (works as SST restoring)
35    o pkg/thsice:
36     -add specific parameter for salt restoring in slab mixed-layer
37       (by default equal to the temperature restoring)
38    
39    checkpoint61v
40    o pkg/kpp:
41     -add double diffusive contributions as a hack, turned off by default
42      for now, and the code can be excluded with a CPP-flag
43      EXCLUDE_KPP_DOUBLEDIFF just as EXCLUDE_KPP_SHEAR_MIX
44     -add a verification experiments to "vermix" to test this code
45    o pkg/mom_common:
46      Move computation of length scales to mom_init_fixed.F (avoid recomputation
47      at each time-steps*levels).
48    o pkg/layers:
49      Created a new package for computing volume fluxes in temperature or
50      [not yet implemented] density layers, e.g. for calculating residual
51      overturning circulations.
52    o pkg/diagnostics:
53      implement a RS type version for the set of DIAGNOSTICS-FILL subroutines
54    o fix few RS/RL type mismatch (check with ifort 11.1 "-warn all" option)
55    o pkg/mdsio (& pkg/rw): rework high level S/R interface:
56      To avoid mixing type (RS/RL) of input/output array argument,
57      replace single mixed-type array with a pair from each type (RS/RL).
58    o setting pickupSuff force to start from a pickup (even if nIter0=0): this
59      is now implemented for all pkgs (previously only done for the main pickup)
60    
61    checkpoint61u
62    o pkg/obcs:
63      - change OB?eta from _RS to _RL and put them into a separate commen block
64      - add code to read OB?eta from a file via obcs_prescribe_read: the code
65        compiles and does not destroy any other experiments, the data is read
66        properly, but the code is not tested in actual applications
67    o ini_mnc_vars.F: if available (ALLOW_CAL), use startTime_1 and 2 to
68      create a meaningful unit attribute for the time coordinate variable
69    o pkg/ebm: add plenty of missing "_d 0" ;
70       update results of experiment global_ocean_ebm (fwd + adjoint tests)
71      Notes: several pieces of code only works for (very) specific set up
72       (domain size, lat range, etc ...); should be documented & stop if one
73       of those assumptions is not meet.
74    o pkg/seaice: add missing "_d 0" in HSNOW initialisation
75       update results of experiments: lab_sea (3 fwd tests + 2 adjoint tests)
76          and offline_exf_seaice (seaicetd + adjoint).
77    o add missing "_d 0" in ShortWave flux penetration (S/R SWFRAC):
78       update results of experiments: lab_sea (4 fwd tests + 3 adjoint),
79        seaice_obcs, global_ocean.cs32x15 (icedyn & thsice) and natl_box (x2).
80    o few changes to pass when compiling with strick checking of arguments
81       across S/R (allow to find few bugs in S/R calls).
82    o pkg/seaice:
83     - seaice_evp: move if-statement out of loop (TEM) at the cost of 11 new
84       2d-fields, for slightly better performance
85    
86    checkpoint61t
87    o pkg/seaice:
88     - remove unused variables in seaice_evp
89     - reduce number of SQRT in seaice_evp and seaice_calc_viscosities
90    o eeset_parms.F, open_copy_data_file.F & ini_parms.F:
91       named file replacing SCRATCH files (for TARGET_BGL & TARGET_CRAYXT):
92       each processor opens a different file (a fix from Matt).
93    o cg2d:
94       use simple EXCH (overlap size = 1 and ignore corners), like in cg3d.F :
95       this reduces number of EXCH calls by 2 when using exch2.
96       For now, keep previous size array for gc2d_nsa.F to avoid Pb with store
97       directives and missing simple EXCH (exch_s3d_rx) adjoint code.
98    o pkg/thsice:
99       add code for Near Infra-Red albedo (from Jeff)
100       (turned on with run-time flag: thSIce_calc_albNIR, in data.ice).
101    o ini_model_io:
102       move (from packages_readparms.F & initialise_fixed.F) to ini_model_io.F
103       MNC & MONITOR initialisation calls; move MNC calls from {pkg}_readparms.F
104       to {pkg}_init_fixed.F for {pkg}= kpp, seaice & shelfice.
105    
106    checkpoint61s
107    o pkg/exch2 (exch2_rxN_cube*):
108       remove last BARRIER (no need to synchronise after getting data from shared
109       buffer (get) as long as any change to buffer (put,recv) is between BARRIER)
110    o change tiling of natl_box (from 2 to 4 tiles) to get it tested with MPI+MTH
111      and generate new output (for the 2 tests) using default rotationPeriod.
112    o pkg/exch2:
113      - always call exch2_*_cube, not exch-1 anymore, if useCubedSphereExchange=F
114        (was already the case with AUTODIFF_EXCH2 defined)
115      - add bj in exch2 arrays and S/R.
116      - can now use pkg/exch2 for regular (non CS) set-up; switch test experiment
117        MLAdjust to exch2 (identical results except with MPI -> truncation diff);
118    o add pkg/longstep for ptracer timestep a multiple of U/V/T/S timestep
119      - adds deltaT argument to the subroutines TIMESTEP_TRACER DWNSLP_APPLY
120        GAD_ADVECTION GAD_CALC_RHS GAD_IMPLICIT_R GAD_SOM_ADVECT
121      - verification experiment natl_box.longstep
122    o build_options: ifort+mpi_aces optfile (following Constantinos advise):
123      allow different versions of ifort (8 or 9) and different versions
124       of mpi (mpich or mpich2) to be used with the same optfile.
125      requires to load a netcdf module and set MPI_INC_DIR (see comments inside
126       optfile). Change testing scripts (example_scripts/ACESgrid) accordingly.
127    o pkg/seaice:
128      fix previous modif (3-level field removed) for old-pickup reading
129    
130    checkpoint61r
131    o pkg/seaice:
132     - clean up the 3-time levels of UICE,VICE,HEFF,AREA in three steps:
133      1. introduce fields for time step (N-1)
134      2. do not use levels 2 and 3 anymore (but keep them)
135      3. replace 3D versions of UICE,VICE,HEFF,AREA by 2D versions. This
136         includes changes to pkg/thsice/thsice_get_velocity.F,
137         model/src/external_forcing_surf.F, pkg/obcs/obcs_apply_seaice.F, and
138         pkg/obcs/obcs_apply_uvice.F.
139     - completely remove code for leap-frog time stepping for second order
140       advection
141     - adjusted adjoint accordingly;
142       gradient checks have improved by an order of magnitude!
143    
144    checkpoint61q
145    o pkg/seaice: fix bug in free slip boundary conditons for LSOR solver
146     - the boundary conditions along open boundaries are unclear, because the
147       associated masks are set to zero and are thus treated as closed when
148       applying the slip-boundary conditions.
149     - move initialisation of grid variables from seaice_init_varia to _fixed
150    o adding doc/diags_changes.txt
151    o model/src:
152      do_the_model_io: rename few pkg S/R which are called from do_the_model_io,
153       to avoid "_diags" naming if no relation to pkg/diagnostics.
154      ini_theta,ini_salt: fix (at least compile the code) reading from NetCDF
155       file and only call PLOT_FIELD_XYZ if debugMode=T.
156      remove few PLOT_FIELD_XY calls outside initialisation.
157      remove few unnecessary BARRIER.
158    o pkg/salt_plume: add SaltPlumeSouthernOcean to allow disabling
159      of salt_plume package in Southern Ocean
160    o pkg/thsice:
161     - fix hOceMxL in overlap (needed for sea-ice advection);
162       update output of experiment global_ocean.cs32x15.icedyn.
163    o pkg/seaice:
164     - make the (placeholder-)tracer IceAge a little more meaningful
165      by avoiding ridging of age due to convergent ice flow
166     - add diagnostics for surface temperature, atmospheric and oceanic
167       heat flux, and atmospheric and oceanic ice growth
168    
169    checkpoint61p
170    o eesupp (global_max & global_sum):
171     - add one more element to buffer (start at index 0) for GL_MAX/SUM output;
172     - remove starting & endding barrier (no longer needed)
173    o pkg/mdsio, writelocal:
174       works also in multi-threaded when LOCBIN_IO_THREAD_SAFE is undefined
175       (remove the STOP): uses shared buffer IO to store data from all threads
176       and then let master-thread write nThreads tiles.
177    o pkg/mdsio (read/write field):
178     - tiled IO done in 1 piece (all levels at a time);
179     - new header file "MDSIO_BUFF_3D.h" with 3-D buffers.
180     - multi-threaded: allow to read/write local (non-shared) array
181       (was already working with singleCpuIO ; now works also without);
182       => no longer needs barrier call after reading a file (added inside
183       mds_read/write field).
184     - move barrier calls outside gather/scatter_2d to mds_read/write_field
185    o pkg/obcs/exf
186      - exf_getffieldrec.F: add a few ". _d 0" and
187                            add code to catch the case fldperiod = 0.  
188      - obcs_precribe_read.F: change if statements so that they match
189                              the variable type (_RL)
190      - add a separate exf_iprec_obcs to exf_set_obcs (by default equal to
191        exf_iprec) as part of namelist EXF_NML_01
192    o pkg/mdsio:
193      - read/write tiled (local) files: read/write 1-level tile chunk at a time
194        (instead of segment of length sNx); expected to speed up tiled IO.
195    o pkg/exch2:
196      - take buffer copy from/to array out of S/R exch2_send/recv into new
197        S/R exch2_put/get ; Exch of local variable now works with MPI+MTH
198        (tested by removing commom block statement in SOLVE_FOR_PRESSURE.h).
199      - ad version of send/recv no longer needed (but needs exch2_ad_put/ad_get)
200      - simplify argument list of S/R exch2_get_uv_bounds and exch2_get_scal_bounds
201        (which replaces exch2_get_recv_bounds & exch2_get_send_bounds) by
202        including Topology header file (and common blocks).
203      - implement EXCH_IGNORE_CORNERS in scalar exchange (rx1);
204        remove 2nd exch call in exch2_s3d_rx (no longer needed).
205      - document S/R arg. list (+ update some comments)
206    o pkg/seaice:
207      - added SEAICE_CLIM_AIR code, which permits modulation of surface air
208        temperature and humidity over sea ice based on climatological values.
209      - clean up computation of Hibler+Bryan (1987) stress coupling for the case
210        of LSR (this change is expected to change the results slightly because now
211        it uses slightly difference moduli from the second last LSR solution, but
212        that is more consistent with the stress computations; this part of the code
213        is not tested in the verification experiments)
214      - fix diagnostics for flux of ice in case of B-grid
215      - turn strain rates eij and press into global fields within global
216        common block in SEAICE.h for more straighforward diagnostics
217      - fix diagnostics for principal stress components, press, zeta, eta
218        to give something meaning full
219    o change tiling of global_ocean.cs32x15 (12 tiles, 32x16) and generate
220      new output (all 4 tests) using default rotationPeriod.
221    o pkg KPP:
222      - add flag (LimitHblStable) to avoid limiting BL depth under stable conditions
223      - fix vertical indices in RI_IWMIX (match between KPP grid from 0 to Nr+1
224        and normal grid from 1 to Nr)
225    o Fix computations of L4rdt in mom_calc_visc.F
226    o eesupp:
227      new S/R ALL_PROC_DIE (like EEDIE, without irrelevant threads err msg):
228      should be called before a "stop" if we know that all process are going
229      to stop; if one Proc does call this S/R, will hang in MPI_FINALISE.
230    
231    checkpoint61o
232    o pkg/exch2: change check_depths to issue just a warning (instead of error+stop)
233    o model/src/ini_curvilinear_grid.F:
234       compute angleSin/CosC when they are not read from a file
235    o pkg/seaice:
236       add pseudo time stepping for LSOR
237    o pkg/exch2:
238       temporary fix for exch2_s3d_rx; update results of exp. hs94.cs-32x32x5.impIGW
239    o pkg/seaice:
240       Adding separate sea ice albedo, drag coefficients, and HO in Southern
241       Ocean from those in Arctic Ocean.  See *_south in SEAICE_PARAMS.h
242    o SingleCpuIO:
243       fix bug put before chkp61n (May 11), when more than 2 MPI cpu are used.
244    o pkg/seaice:
245       put exchanged variable in (local) common block for MPI+Multi-Threads
246       to work (necessary with exch1, and for now with exch2 too).
247    o verification: to get more experiments tested with mpi, mth and mpi+mth,
248      change tiling of:
249       aim.5l_Equatorial_Channel, aim.5l_LatLon, dome, exp4, global_ocean.90x40x15,
250       hs94.cs-32x32x5, MLAdjust, offline_exf_seaice & tutorial_plume_on_slope
251      update output of exp:
252       exp4, global_ocean.90x40x15(+.dwslp), MLAdjust(all 5),
253       tutorial_plume_on_slope and hs94.cs-32x32x5 (use default rotationPeriod)
254      + ideal_2D_ocean: use default rotation period + test Global_Sum_SINGLECPU
255                       (note: output.txt generated on faulks using only 1 tile)
256    o eesupp & mdsio (SingleCpuIO):
257     - remove MISSING_TILE_IO (from MDSIO_OPTIONS.h), replaced by run-time
258       parameter "W2_useE2ioLayOut" (read from file "data.exch2").
259       Note: was not effective for globalFile & useSingleCpuIO=F; now fixed.
260     - move MDSIO_SCPU.h (pkg/mdsio) to EEBUFF_SCPU.h (eesupp/inc).
261     - fix GLOBAL_SUM_SINGLECPU when using Exch2; re-use same buffers and same
262       gather/scatter S/R as with SingleCpuIO (=> 1 less 2D global RL array).
263    o pkg/exch2:
264     - new code to set-up W2-Exch2 topology (replace matlab-topology-generator):
265       read parameter file "data.exch2" if it exists; otherwise try default regular
266       cube without blank-tile; new header file "W2_EXCH2_SIZE.h";
267     - update matlab-topology-generator (exch2_setup_cs6_print.m) to be compatible
268       with new code (not to be used, just as a backup solution).
269     - add examples (e.g., for lat-lon-cap_120) of parameter file "data.exch2"
270       in utils/exch2/input.
271    
272    checkpoint61n
273    o eesupp & mdsio (SingleCpuIO):
274      - move mapping to global io-buffer inside gather_2d/scater_2d: this save
275        memory (1 less 2D global RL array); skip 1 buffer copy; and only send/
276        receive real*4 array (instead of real*8) to read/write 32.bit files.
277        (new template for gather_2d/scater_2d, new set of S/R MDS_PASS_R4,8toRL,S
278         and remove new mapping S/R)
279    o pkg/mdsio: in preparation for topology-generator within pkg/exch2:
280      - Change declaration of SingleCpuIO buffer, reduced to only 1 dim.:
281        xyBuffer_size, which is set to W2_ioBufferSize from W2_EXCH2_PARAMS.h
282        when using exch2. Add S/R to map global io-buffer to global model array.
283      - uses exch2_global_Nx,y instead of exch2_domain_nxt,nyt.
284    
285    checkpoint61m
286    o write_utils : change WRITE_1D_R8 to WRITE_1D_RL
287      and add 3 other S/R for other types (R4,R8,RS).
288      Change calls to WRITE_0D/1D_R[4,8,S,L] to match the type of argument.
289    o eesupp/inc/CPP_EEMACROS.h (EXCH & GLOBAL_SUM/MAX macros):
290     - ensure suffix (_R4,_R8,_RS,_RL) correspondance between macro and S/R ;
291     - reduce number of macro definitions (keep only those which are used);
292       can always call directly the corrresponding S/R if needed.
293     - everywhere in the code: change macros (EXCH & GLOBAL_SUM/MAX) suffix
294       _R4/_R8 to _RS/_RL when applied to _RS/_RL variable.
295     Fixed wrong type of arg in:
296       atm2d/put_ocnvars.F cheapaml/cheapaml.F ocn_compon_interf/ocn_apply_import.F
297       ctrl/ctrl_map_ini_ecco.F seaice/seaice_do_diags.F seaice/seaice_model.F
298     To fix: global_sum of var in common block is wrong (multi-threaded) in:
299       dic/dic_atmos.F ebm/ebm_area_t.F ebm/ebm_zonalmean.F sbo/sbo_calc.F
300     To fix: aim_v23/aim_do_co2.F (BARRIER & GLOBAL_SUM within bi,bj loops)
301    o adjustment.cs-32x32x1: test "blank tiles" when compiling with mpi; 2nd
302      "nlfs" mpi test is going to stop when checking for unconnected tile egdes.
303    o eesupp/src: new S/R to stop everyone when 1 (or more) Proc. find an error
304    o pkg/exch2: new S/R EXCH2_CHECK_DEPTHS to check that unconnected tile
305      edges are closed (zero depth); might happen with "blank tiles";
306      for now, disabled if using OBCS.
307    o tools/gemake2: delete modifs from March 27-29 2009 (with option "-mpi":
308      link *_mpi files from "MODS" dir) to return to a strait-forward behavior.
309    o move read_write.F to write_utils.F ; new parameter (maxLengthPrt1D)
310      to reduce length of 1.D array print in STDOUT.
311    o adjustment.cs-32x32x1: changed to oceanic test with 1 continent
312      + use 48 tiles (16x8): this will allow to test "blank tiles".
313    o start to test MPI + multi-threaded (change testreport to skip tests
314      where number of tiles do not match).
315    o genmake2: add option "-omp" to turn on Open-MP ;
316      passed to testreport (if using -mth) ; merge few (*+mth) optfiles.
317    o pkg/exch2 (+ utils/exch2): ignore blank tiles (instead of removing them)
318      and keep the original tile numbering. Note: compatible with old
319      W2_EXCH2_TOPOLOGY.h & w2_e2setup.F topology files.
320    
321    checkpoint61l
322    o Overlaps had been forgotten in calculating ijk keys : fixed
323    o fix cyrus makedepend for gcc 4.4
324    o experiment fizhi-cs-aqualev20:
325      switching to new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE)
326      and generate new output. Note: new output is much closer to the old
327      one (v1.8) generated with pgf77 -O2 on Mar 14 2007 than it is from
328      the previous one (v1.9) generated with pgf77 -O0 on Jun 13 2007.
329    o pkg/fizhi:
330     - change to avoid indices going deliberately over array-bounds
331     - remove unnecessary MPI stuff
332     - perpetual spring equinox with "#define FIZHI_USE_FIXED_DAY"
333     - new version of S/R GETPWHERE available with #define TRY_NEW_GETPWHERE:
334       does not go over array-bounds and therefore returns reliable output.
335     - in fizhi_driver.F & fizhi_turb.F, fix "get_alarm" calls:
336       this S/R has 4 output arguments, which are used inside "get_alarm";
337       when it is called with the same variable "ndum" in place of several
338       output arguments, this produces weird side effect inside "get_alarm"
339      (e.g., datein=dates(n) is overwritten by timein=times(n) since both
340       datein & timein, resp. 2nd and 3rd arg., are pointed to the same "ndum"
341       address) and produces error.
342    o tools/gemake2: (March 27-29 2009)
343      with option "-mpi": link *_mpi files from "MODS" dir (this is what
344      testreport does).
345    o lab_sea experiment: change from 2x1 tiles to 2x2 tiles and regenerate output
346    o pkg/seaice: fix bug in new version of S/R SEAICE_LSR.F:
347       update lab_sea.lsr & lab_sea.salt_plume results
348    o pkg/seaice:
349      Major overhaul of the LSOR solver: change discretization from original
350      finite differences to finite volume. The old routine is still in the
351      file seaice_lsr.F and can be turned on with the CPP-flag
352      SEAICE_OLD_AND_BAD_DISCRETIZATION
353      Along with this change, the discretization of the strain rates is changed.
354      The same flag turns on the old discretization in seaice_calc_strainrates.F
355      All verification experiments with seaice are affected (except for
356      seaice_exf_offline); global_ocean.cs32x15/input.icedyn recovers the old
357      results by setting the above flag.
358      Further changes involve changes in defaults:
359      - ALLOW_FLOODING is defined and turned on by default
360      - SEAICEadvSnow = .true. is now the default
361      - SEAICEadvSalt = .true. is now the default
362      - SEAICEadvAge  = .true. is now the default
363      - SEAICE_clipVelocities  = .false. is now the default
364                                         (as per J. Zhang's recommendation)
365      - B-grid, and thus not tested: SEAICE_TEST_ICE_STRESS_1/EXPLICIT_SSH_SLOPE
366        is defined, SEAICE_TEST_ICE_STRESS_1 is renamed into SEAICE_BICE_STRESS
367      - seaice_growth: replace computation of UG by a simple copy from wspeed
368    
369    checkpoint61k
370    o pkg/seaice: a few bug fixes mostly concerning the metric terms:
371      seaice_lsr: fixed a few metric terms,
372                  affects lab_sea.lsr, lab_sea.salt_plume, seaice_obcs
373                  add more debugging diagnostics
374      seaice_evp: removed superfluous many metric terms of FV discretization
375                  of stress divergence
376                  affects lab_sea, lab_sea.hb87
377      seaice_ocean_stress: removed superfluous many metric terms of FV discretization
378                  of stress divergence for non-evp solver
379                  (this part is not tested anywhere)
380      seaice_calc_strainrates: fixed a bug in no-slip boundary conditions,
381                  they were effectively only half slip
382                  affects lab_sea.hb87
383      updated all relevant verification experiments (except lab_sea//output_adm.txt
384        which was left over, but fails at level 7 & 6)
385    
386    checkpoint61j
387    o pkg/seaice: turn a few hard wired parameters into run time parameters
388    o pkg/seaice/exf/monitor: turn netcdf coordinate variable T into model
389      time in seconds as promised by the usints in seaice_monitor and exf_monitor
390    o pkg/mnc: fix the coordinate variables for multi-tile curvi-linear grids
391      that are not cubed-sphere grids
392    o pkg/seaice: fix a bug for the rare case of SEAICE_VECTORIZE_LSR
393    o pkg/ctrl:
394      fix bug in ctrl_depth_ini.F (EXCH_XYZ was applied to 2-D field xx_r_low)
395    o non-hydrostatic (calc_gw.F):
396      fix viscA4 on CS-grid + fix diagnostics: Wm_Diss & Wm_Advec
397      update output of exp. global_ocean.cs32x15.viscA4
398    o remove backward compatibility for thetaMin,phiMin
399      (replaced by xgOrigin,ygOrigin on Jan 27, 2009)
400    o pkg/exf: fix a serious bug in exf_set_uv.F: do a rotation of the
401      interpolated wind field not only for curvilineargrid=.true., but also
402      for a rotated grid (rotateGrid=.true.)
403    o pkg/exf: add capability to bypass interpolation for runoff
404      by setting yet another CPP-flag
405    o eesupp/src, B-grid exchange:
406      add simple (6 tiles, non MPI) CS exch + standard interface S/R.
407    o autodiff
408      new CPP option ALLOW_TAMC_SINGLEPREC_COMLEV
409      allows to switch to single-prec common blocks;
410      corresponding switch occurs in tamc.h, integer isbyte
411      TAF store directivs "byte" and "kind" seem equivalent;
412      Most tamc.h have been updated correspondingly.
413    
414    checkpoint61i
415    o autodiff:
416      fix autodiff_sore/_restore indices for obcs
417      (spotted by I. Hoteit, M. Mazloff)
418    o pkg/autodiff, pkg/ctrl:
419      Add flag to reduce all tapelev I/O to single-prec.
420      In data.ctrl set
421        doSinglePrecTapelev = .TRUE.
422    o model/src/ini_curvilinear_grid.F, new grid-file format without EXCH2:
423      check in hack for SX8 compiler (for dxV, dyU); remove it afterwards.
424    o pkg/shelfice: fix bug with SHELFICEconserve flag, prepare for
425      real fresh water flux (not yet)
426    o pkg/mdsio & rw:
427     - add argument & option to S/R MDS_WRITEVEC_LOC (avoid Open/Close & write-meta)
428     - add simple interface S/R to MDS_WRITEVEC_LOC in pkg/rw: WRITE_GLVEC_RX.
429    o pkg/flt:
430     - replace FLT_INIT by 3-steps standard initialization S/R: readparms,
431       init_fixed & ini_varia.
432     - clean-up & simplify linear interpolation S/R:
433       move flt_bilinear.F -> flt_interp_linear.F ; add arg. myThid.
434     - fix some indices (mainly vertical index) ; add IMPLICIT NONE.
435     - more efficient I/O, using new options of MDS_WRITEVEC_LOC S/R.
436     - add vert. coordinate & horiz. indices to output files.
437     - change vertical position in initial condition, from index to depth [m].
438     - store horizontal (decimal) indices i,j in common block (instead of coord. x,y)
439       (easier to get to a curvilinear grid) ; delX,delY no longer used.
440    o pkg/ggl90: a few modifications:
441     - fix bottom boundary condition, and interpolation of KappaE
442       near top and bottom
443     - use same set of viscosity/diffusivity for TKE/momnetum/tracer
444     - add smoothing option as in Blanke and Delecluse (1993) (--> ALLOW_GGL90_SMOOTH)
445     - add a few options for mixing-length upper limit (--> mxlMaxFlag)  
446    o rename thetaMin,phiMin -> xgOrigin,ygOrigin
447      (maintain temporary backward compatibility, until next checkpoint)
448    
449    checkpoint61h
450    o pkg/diagnostics with "periodic averaging diagnostics":
451      fix S/R DIAGNOSTICS_COUNT ; hack diagnostics_out.F to get NetCDF output.
452    o pkg/my82: add missing "_d 0" ; update output of exp. vermix.my82
453    o pkg/obcs: fix loop ranges for balancing code
454    o pkg/flt:
455     - improve criteria for finding which tile owns a float.
456     - fix FLT_EXCH for case without MPI ; apply cyclic BC + fix also the MPI case.
457    o Add well-mixed CO2 box in aim_v23 (which includes changes in pkg
458      aim_compon_interf, ocn_compon_interf, gchem, and dic to get coupling
459      with ocean biogeo)
460    o pkg/flt:
461     - do some cleaning and fix the restart ;
462     - add output.txt in flt_example/results to get this pkg tested.
463    o genmake2: add an EXTENDED_SRC option and flag.
464       for now, cannot be turned on on command line (only through genmake_local)
465    o pkg/mdsio: read/write vector:
466     - singleCpuIO: fix RL/RS in MDSWRITEVECTOR by calling new S/R MDS_BUFFERtoRL/RS
467     - singleCpuIO=F: fix arrType & filePrec & _BYTESWAPIO in both MDSREADVECTOR
468       & MDSWRITEVECTOR by calling new S/R MDS_RD/WR_VEC_RL/RS.
469     - affects gradient of test-exp "bottom_ctrl_5x5" (not due to _BYTESWAPIO)
470      (drop to 4 digits matching for grad). But this test does not look very
471      reliable (was already failling on eddy, fc5, at 6.digits). Update output.
472    
473    checkpoint61g
474    o pkg/flt:
475      - move FLT_CPPOPTIONS.h to FLT_OPTIONS.h (standard name)
476       + make OPTIONS file more standard.
477      - rename S/R MDSREADVECTOR_FLT to FLT_MDSREADVECTOR (to mach src file name)
478      - fix _BYTESWAPIO CPP-Flag
479      - standard reading of file-parameter "data.flt"
480      - fix argument list of S/R FLT_RESTART
481      still need to fix _BYTESWAPIO in pkg/mdsio/mdsio_writevector.F
482    o pkg/obcs: fix a CPP-flag, bug reported by Jeff Blundell
483    o gather_2d.F/scatter_2d.F: suppress vectorisation on NEC SX in respond to
484      a still unfixed compiler/optimization bug
485    
486    checkpoint61f
487    o pkg/seaice, LSR solver: fix bug in GLOBAL_MAX calls ;
488      update results of global_ocean.cs32x15.icedyn test.
489    o move getcon.F from model/src to pkg/fizhi.
490    o pkg/exf: add parameter for extrapolation of temp up to the surface
491       and option to prevent negative evap (in bulk_largeyeager04 only).
492    o Prather Advection scheme: fix tracer conservation for divergent flow
493      (e.g., when using NonLin Free-Surface).
494    o kpp: retire KPPmld diagnostics --> use MXLDEPTH instead
495    o gmredi (Visbeck-variable-K):
496     - add more parameters to Visbeck-variable-K.
497     - use a 5 points average for dSigmaR in Visbeck-K calculation
498       (more "homogenous": same stencil and same weights as in dSigmaH)
499     - update output of ideal_2D_oce experiment.
500    o fix CPP-flag REAL4_IS_SLOW, when _RS expands into real*4
501      (#undef REAL4_IS_SLOW)
502     - pkg/mnc/mnc_cw_cvars.F: write _RS-grid variable as netcdf-real*4
503       coordinate variable
504     - pkg/monitor/monitor.F: call mon_printstats_rs for _RS variables
505       (surface forcing fields), removes some of the functionality
506     - model/src/write_grid.F: write _RS variables as RS-netcdf variables
507     - model/src/diags_oceanic_surf_flux.F: fix a few diagnostics, but
508       probably not all: copy _RS surface flux fields to RL field before
509       calling DIAGNOSTICS_FILL
510     - model/inc/CPP_EEMACROS.h: make the _EXCH_*_RS macros expand into
511       real*4 (CALL EXCH_*_RS) versions.
512     - tested in 2 experiments: inverted_barometer & solid-body.cs-32x32x1
513       (generate new output).
514    
515    checkpoint61e
516    o gmredi (Visbeck-variable-K):
517      - fix the "OLD_VISBECK_CALC" option + move the #undef to GMREDI_OPTIONS.h
518      - change computation of Visbeck-K where Slope > Smax :        
519        now: N*min(Slope,Smax) (similar to OLD_VISBECK_CALC with gkw91 taperFct)
520        previously was: M*sqrt(min(Slope,Smax)) ; update ideal_2D_oce output.
521    o bottom-drag in P-coord.: change units of bottomDragLinear & bottomDragQuadratic
522      to be the same as with Z-coord. (i.e., m/s & no-units respectively).
523    o calc_viscosity: fix index range (was wrong for CD-Scheme & explicit Visc)
524    o pkg gmredi, linear & fm07 tapering: put an upper limit on Slope^2 so that Kwz
525      does not become too large (to avoid precision problems in implicit-diffusion
526      solver); update ideal_2D_oce output.
527    o pkg ggl90:
528      - in ggl90_cal.F: compute only one set of visc/diff, used to
529        step forward TKE/T/S/momentum
530      - default value of GGL90viscMax/GGL90diffMax larger and equal (to
531        have Prandlt =1)
532    o gmredi (fm07):
533      - add lower limit on Transition layer thickness + lower limit on 1/lambda
534      - allow to set few more params from data.gmredi
535    o pkg ggl90:
536          - add missing sqrt(2) factor in computation of mixing length
537            scale in ggl90_calc.F
538            (see Eq. (2.35) in Blanke and Delecluse, JPO, 1993)
539    
540    checkpoint61d
541    o adjoint modifs
542      - adapt to new field rhoInSitu
543      - allow to revert from StoreDynVars2D, StoreDynVars3D
544        to individual fields
545        (switches AUTODIFF_USE_OLDSTORE_2D, AUTODIFF_USE_OLDSTORE_3D)
546    o store 3-D (in-situ) density in commom block (DYNVARS.h)
547     - save 1 rho computation.
548     - no longer modify T & S inland when using down_slope pkg.
549    o gad_som : allow to switch to SOM advection for T & S without corresponding
550      pickup files (using new S/R: MDS_CHECK4FILE).
551    o keep removing _BEGIN/_END_MASTER between MDSIO S/R call
552      (for useSingleCpuIO to work in multi-threaded)
553    o pkg/shelfice:
554     - disentangle parameters: retire shelfIceFile in data/PARM05 and substitute
555       with SHELFICEtopoFile in data.shelfice
556     - move code for reading ice shelf topography and modifying hFacC into separate
557       subroutines of the shelfice package
558     - separate initialisation of "fixed" and "variable" variables
559     - kTopC is not (yet) replaced by kSurfC, although this is possible
560    o fix broken diagnostic SIatmFW and changed the units from m/s to kg/m^2/s
561    o add initialisation of deepFac if using Pcoords (new S/R set_grid_factors)
562      and rename:
563      ini_phiref.F          --> set_ref_state.F  (+ set anelastic factors)
564      ini_reference_state.F --> load_ref_files.F (- set anelastic factors)
565    o change FIND_RHO_SCALAR : return rho (instead of rho - rhoConst)
566    
567    checkpoint61c
568    o add option ALLOW_ADDFLUID and run-time selector "selectAddFluid"
569      to add mass source/sink of fluid in the interior (3-D generalisation
570      of oceanic real-fresh water flux).
571    o pkg/monitor: fix recip_dr argument in mon_advcflw2 call (-> advcfl_W_hf_max)
572    o vermix test experiment: switch from LINEAR EOS to MDJWF (not tested before)
573    o new pkg: down_slope
574      density-driven downsloping flow parameterisation (Tellus, 1999, 412-430).
575      - presently, modify T & S inland (dwnslp_calc_rho.F).
576        can be avoided if rho was stored in common bloc and used in calc_phi_hyd.
577      - implementation for ocean in P-coords not tested.
578      - add secondary test to global_ocean.90x40x15 (input.dwnslp) to check this pkg.
579    o move kSurfC,kSurfW & kSurfS from SURFACE.h to GRID.h (next to kLowC)
580      (to facilitate conversion of oceanic pkg to p-coordinate).
581    o change FIND_RHO to FIND_RHO_2D :
582      pass arguments tFld & sFld as local (tile) 2D-arrays ; +fix EOS_CHECK.
583    o new pkg: cheapaml
584    
585    checkpoint61b
586    o exch2:
587      change index bounds in rx2_cube exchanges (new S/R: EXCH2_GET_UV_BOUNDS)
588      - no longer depend on the order sequence (N,S,E,W).
589      - 3rd exchange no longer needed (tested with 24 tiles).
590      - same modif to hand-written adjoint S/R (global_ocean.cs32x15: zero diff)
591      - exch_UV_A-grid readily available (but not yet tested).
592      comment out 3rd exch call and remove copy of V to U at SE & NE face-corners
593      (both are no longer needed) in exch_uv: no effect in forward run; but
594       get truncation error differences with adjoint exch.
595    o exch2:
596     - change index-bounds storage (moved from target to local tile,
597       more intuitive this way) ; rename/remove some variables.
598     - change utils/exch2/matlab-topology-generator & code_mods accordingly.
599    
600    checkpoint61a
601    o exch2/matlab-topology-generator:
602      fix bug in index bounds for N-S internal exchange (hard to tell if this
603      had any effect on the solution).
604    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
605      is exceeded
606    o testreport: modify syntax of awk, so that it works also with
607      awk, and not only with nawk and gawk
608    
609    checkpoint61
610    o autodiff
611      Change default for TAF usage by removing argument '-nonew_arg'
612      This changes TAF subroutine argument list (ordering of active var.)
613      Omission of this flag leads to incompatibility w.r.t. TAMC
614      To restore TAMC-compatibility, need following modifs:
615      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
616      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
617      Tested TAF version is 1.9.22
618      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
619    
620    checkpoint60
621    --->>> This is the last checkpoint for which generating the adjoint
622    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
623    --->>> by default.
624    --->>> Future checkpoints will ommit this flag by default.
625    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
626    o pkg/grdchk: Add gradient check to etan0 perturbations.
627    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
628    o pkg/autodiff: more flexibility in zeroadj.
629      model/src: modifying do_oceanic_phys.F accordingly.
630    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
631    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
632      special setup of gmredi for which the adjoint is stable
633      enough for parameter optimization.
634    o bridging the gap between eddy stress and GM.
635      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
636          along with a change in CPP option (now ALLOW_EDDYPSI).
637      -> when using GM w/ GM_AdvForm:
638          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
639          is applied either in the tracer Eq. or in momentum Eq.
640          depending on data.gmredi (intro. GM_InMomAsStress).
641      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
642      The key modifications are in model/src/taueddy_external_forcing.F
643      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
644    
645    checkpoint59r
646    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
647      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
648      fix option to read coriolis(@ cell-corner) from files with CS-grid.
649    o pkg/mnc: add some attributes to standard 1D-coordinate variables
650    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
651      mass points, when using mnc for output
652      - add runtime parameter (missing_value, missing_value_int) to override
653        default (which is the value of getcon('UNDEF'))
654    o pkg/mnc: prepare mnc for the actual use of missing values with the
655      diagnostics package: small fix in mnc_cw_readwrite.template and more
656      initialisation of never used fields
657      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
658      versions
659    o pkg/thsice/thsice_ini_vars.F added default initial values so that
660      thermodynamics sea ice solver does not blow up when some initial fields
661      are missing.
662    o move from external_forcing_surf.F to ini_forcing.F
663      the p-coord. hack consisting in using pLoad to set phi0surf ;
664      update output of tutorial_global_oce_in_p (affected @ truncation level).
665    o Freshen up a bit hs94.1x64x5, notably:
666      remove rotationPeriod and tRef=5*0. (adjoint only), and add
667      exactConserv=.TRUE.
668    o pkg/generic_advdiff:
669      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
670      applies to files where Temperature & Salinity 2nd Order moments are used.
671    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
672      this uses a dynamically allocated internal state data structure
673      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
674      and requires a fortran 90 compiler
675    
676    checkpoint59q
677    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
678       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
679    o Refresh tutorial_global_oce_biogeo, notably:
680      - change bathymetry (put back seamounts in ACC, use hFacs)
681      - change EOS (POLY3 --> JMD95Z)
682      - use Bryan-Lewis vertical diffusivity
683      - use multidimensional advection
684      - remove old virtual virtual in dic pkg, now done through ptracer pkg
685      - change a couple of parameters in dic pkg
686    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
687    o pkg/obcs: change default to OBCSfixTopo = .true.,
688      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
689      - replace "debugMode" with "debugLevel .GE. debLevB"
690    o implementation of TAF directives for gchem,cfc,dic
691    o remove "exp5" (replaced by tutorial_deep_convection).
692    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
693      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
694      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
695      --> changes results in exp4, seaice_obcs
696    o tutorial_deep_convection :
697      update the set-up and increase resolution and domain size ; start
698      from pseudo initial conditions = output at t=120mn in order to see
699      something happening when running testreport.
700    o pkg/seaice: add os7mp as an advection scheme
701                  add check for advection schemes
702                  add a flag for restoring T and S underneath sea ice
703    o pkg/my82: add netcdf-support and diagnostics
704    o thsice pkg:
705      - Now hsMax limits snow height by turning it into ice following
706        flooding scheme (and now conserving energy)
707      - Slight rewriting of the formula in thsice_calc_thick.F
708      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
709      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
710    
711    checkpoint59p
712    o gchem / dic / cfc :
713      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
714      - add new parameter files: "data.dic" & "data.cfc" ;
715      - various re-arrangement in initialisation & header file ;
716      - fix tutorial_global_oce_biogeo for multi-threaded test.
717    o pkg/dic: test for "pickup_dic" file when restarting ;
718      if no pickup-file, can restart with a re-initialised pH (same as it did
719      before) providing pickupStrictlyMatch is set to False.
720    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
721      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
722    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
723      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
724    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
725     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
726       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
727    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
728       scheme to use for vorticty-term ;
729     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
730       (with default selectVortScheme, return to original discretisation)
731     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
732    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
733    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
734      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
735      also fix diagnostics VISCAHW & VISCA4W.
736    
737    checkpoint59o
738    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
739    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
740      move a few statemens out the main loop into separate loops
741    o pkg/shelfice:
742      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
743        (kg/m^2/s), does not break tests, because in verification/isomip,
744        rhoConstFresh=rhoConst (by accident)
745      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
746      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
747        new file model/src/seawater.F, so that they are available for all pkgs.
748      - convert potential temperature into in-situ temperature. This changes the
749        isomip tests => update tests
750    o add a flag writePickupAtEnd (default=true) to be able to suppress
751      writing a pickup at the last timestep
752    o tools/mpack-1.6 :
753      - disable automake (not working) and autoconf (not needed).
754      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
755        also cleaner with much less compilation warnings.
756    o pkg/profiles:
757      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
758      (for "less than 32 characters name" compiler requirement)
759    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
760      conditions that have a different sampling frequency than S/T/U/V obcs
761    o pkg/diagnostics (stats-diags):
762      - fix global Min/Max in case 1 processor get only empty tiles
763    o genmake2: replace (4 times)
764         make genmake_tc_1.o >> genmake_warnings 2>&1
765      with
766         COMM="$CC $CFLAGS -c genmake_tc_1.c"
767         echo $COMM >> genmake_warnings
768         $COMM >> genmake_warnings 2>&1
769      to make genmake2 always see the value of CC as specified in the optfile.
770    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
771      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
772      - modify verification advect_cs test to test SOM-advection on CS-grid.
773    o pkg/ctrl:
774      - Rewrite of ctrl_map_ini_ecco.F,
775        introducing a generic routine (ctrl_map_ini_gen.F).
776      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
777    
778    checkpoint59n
779    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
780      number in dedicate array "hdiag":
781      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
782        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
783      - many small changes (integer format) for large number of diagnostics
784      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
785        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
786    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
787      usingSphericalGrid, this allows to define the rotated grid coordinates
788      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
789      geographical coordinates according to the inverse of the rotation defined
790      by the Euler angles, so that Coriolis parameter and online-interpolation by
791      exf works with the geographical coordinates on XC/YC/XG/YG.
792      Naturally, this feature does not work with all packages, so some
793      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
794      profiles), because there the coordinates are assumed to be regular
795      spherical grid coordinates.
796    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
797      - introduce isopycnal diffusion coefficient control.
798    o tools/adjoint_options:
799      - additional control vector components.
800    o pkg/mnc: have mnc create marginally meaning full coordinate variables
801      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
802    o pkg/mypackage:
803      - add example of read/write pickup for state-var ;
804      - add entry points to the main code for state-vars diags & write-pickup.
805    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
806      transitions for useExfYearlyFields
807      - add new subroutine that determines the file to read from for
808        use*YearlyFields = .TRUE. and .FALSE.
809      - add a verification experiment to global_with_exf that tests
810        useExfYearlyFields with USE_EXF_INTERPOLATION defined
811    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
812      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
813      subroutines (which could be generated from a template, because they are
814      almost identical), for now they are included in obcs_prescribe_read.F for
815      simplicity
816    o pkg/exf:
817      - add a little more diagnostic to exf_interp_read (in analogy to
818        mds_read_field, can be turned off with debugLevel < debugLevA=1)
819      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
820        ugly but fast by unrolling short inner loops, inserting a unroll=8
821        directive in routine lagran, and splitting a loop and making do while the
822        outermost loop (the latter requires the intoduction of index arrays)
823    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
824    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
825      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
826    o verification/seaice_obcs: updated for restart test and latest options
827    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
828      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
829      for now this is only available for the C-grid code and also within
830      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
831    
832    checkpoint59m
833    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
834      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
835    o gad_som : fix flux output (& diagnostics) to have same units as other  
836      advection scheme fluxes (was previously multiplied by deltaT).  
837    o added verification/seaice_obcs both to test seaice open boundaries
838      and to provide an example matlab scrpt for generating them
839    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
840    o pkg/salt_plume: clean up salt_plume_frac.F to
841      remove redundancy in PlumeMethod 1 and 4
842    o pkg/kpp: added saltplume diagnostics
843    o pkg/obcs and pkg/seaice:
844      - do not set uice and vice to zero when OB*icefile are unspecified
845      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
846      - moved seaice tracer obcs after call to seaice_growth
847    o pkg/salt_plume: added various options for salt plume depth
848      criterion and for vertical distribution of the salt
849    
850    checkpoint59l
851    o pkg/ptracers: new version of ptracers pickup:
852      read meta file and write only fields which are needed to restart.
853      ( same logic as main pickup file ; also using pickupStrictlyMatch )
854    o pkg/seaice:
855      - add timescale for melting due to warm mixed layer as a means of
856        setting SEAICE_availHeatFrac more conveniently
857      - add a CPP-flag/runtime parameter check for flooding algorithm
858      - reformulated availHeat in seaice_growth.F to be independent of AREA
859    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
860      unit changes
861    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
862    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
863      SX vector computer.
864    o pkg/seaice:
865      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
866        seaice forcing fields can now be read only through pkg/exf
867      - removed some unused halos
868    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
869    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
870      or U/VICE from U/VWIND before computing U/VSTRESS
871    
872    checkpoint59k
873    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
874      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
875    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
876      all experiments pass when compile with un-initialised var. checking option.
877    o added pkg/salt_plume
878    o script to test restart (for now, in MITgcm_contrib/jmc_script)
879    o pkg/seaice: new read/write pickup version.
880      read meta file and write only fields which are needed to restart.
881      ( same logic as main pickup file ; also using pickupStrictlyMatch )
882    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
883    o lab_sea.hb87: modify the domain & update output.hb87.txt :
884      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
885      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
886      process. Fixed here by closing the domain at the Northern boundary.
887    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
888    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
889      a set of consecutive levels in/from a 3-D array.
890    o pkg/ptracers:
891      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
892      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
893    
894    checkpoint59j
895    o in pkgs: dic, obcs, offline, rbcs:
896      standard way to compute coeff. for time interpolation between 2 time reccords
897      which retains full precision (& make results less dependent on compiler).
898      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
899    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
900      packages instead of reading ice cover and wind speed separately
901    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
902     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
903      to allow to compile customized code before the update)
904    o cleaning-up:
905      - fix CPP instruction syntax in pkg/obcs
906      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
907        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
908      - fix some threads issue in IO parts.
909    o pkg/dic:
910      - add tons of "_d 0" (--> much better testreports !)
911       and then update outputs of tutorial_global_oce_biogeo
912    o pkg/mom_fluxform:
913      add a special version of momentum advection intended to conserve momentum
914      next to a bathymetry step or a coastline edge. (default = off = #undef)
915    o new read/write pickup version:
916      - for now, only implemented for main (mdsio) pickup file.
917      - write out only what is needed to restart; merge pickup_nh , pickup_ph
918        and main pickup together.
919      - read meta file; read only what is needed to restart; stop if a field
920        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
921        if it make sense (even if the restart is not perfect).
922      - if no meta file, assume that pickup to read corresponds exactly to
923        a pickup that would currently be written.
924      - read pickup written in the old format (until checkpoint59i) if it
925        recognizes an old meta file (no field-list).
926      - add a meta file in exp. which starts from a pickup: 2 cases:
927        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
928         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
929        b) a meta file describing the content of the associated pickup file
930         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
931    o pkg/mdsio & pkg/rw:
932      - new routine to read a meta file ; new set of routine to read
933        Multiple-fields file (with meta file).
934    o added open boundary conditions capability for seaice
935        HSNOW, HSALT, UICE, and VICE
936    
937    checkpoint59i
938    o adjoint:
939      * fix multiDimAdvection adjoint
940        (partial recomputation problem by TAF for fVerT(:,:,kDown)
941        and comlev1 size definition (maxpass vs. max. number of tracers)
942      * verification/global_ocean.90x45x15 adjoint now tests
943        NLFS and multiDimAdvection using DST3 (=30)
944      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
945    o pkg/kpp: add "_d 0" to real constant (if missing);
946      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
947      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
948    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
949      for internal parameters related to restart process (formerly from PARAMS.h)
950      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
951    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
952      as argument. (only atm2d & obcs write_pickup have not yet been updated)
953    o pkg/monitor:
954      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
955      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
956      - account for deep Atmosphere factor and density factor (anelastic)
957    o added open boundary conditions capability for seaice HEFF and AREA
958    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
959      thermodynamics
960      - requires a little reorganization, which affects the testreport results
961        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
962        so that now the conservative form is tested
963      - add a few comments
964    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
965    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
966    o add new diagnostics to seaice: advective, diffusive fluxes (only for
967      multidim-advection, for scheme 2 they are not filled) and transports,
968      thermodynamic growth rates
969    o change units of EmPmR (inside the code, + within coupling interface)
970      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
971      Affects results @ truncation level (cg2d match) and update output of
972       experiments: lab_sea(6), global_ocean.90x40x15(10),
973      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
974      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
975      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
976      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
977    
978    checkpoint59h
979    o pkg/exf:
980      - improve vectorization by moving if-statement out of loops in
981        exf_mapfields, exf_radiation
982      - exf_bulkformulae.F: introduce 2D fields and vectorize code
983    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
984    o testreport:
985      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
986        monitor & update offline_exf_seaice exp. output.
987      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
988    o pkg/seaice:
989      - bug fix in the evp solver: boundary conditions were affected be
990        masking of zMax/zMin (changes results)
991      - minor bug fix in boundary conditions in seaice_calc_strainrates
992        (changes results for no_slip)
993      - seaice_lsr.F: make interpolation of eta dependent on boundaries
994      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
995      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
996        stress formulation and no-slip boundary conditions
997    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
998      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
999    o pkg/seaice: a first HSALT time stepping equation has been checked in
1000    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
1001      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
1002      without requiring DO-IF statements
1003    o pkg/thsice:
1004      use continuous power-law function for partition of energy between lateral
1005      melting/freezing and thinning/thickening ; old code using step function
1006      still available with #undef THSICE_FRACEN_POWERLAW
1007      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
1008    o testreport: change AD testing : check against results/output_adm.txt
1009      using same scripts as for forward test.
1010    
1011    checkpoint59g
1012    o adjoint testing: in preparation for changing testreport:
1013      - output format: cost and grad written on separated lines
1014      - ad output results in directory "results" (instead of "results_ad")
1015    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
1016    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
1017    o pkg/ecco: allow user defined cost function contributions
1018    o testreport:
1019      Allow to choose (per experiment) the list of tested output variables
1020       and the main variable (used to issue a pass/FAIL ) ;
1021      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
1022      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
1023      Also modify printing of summary:
1024       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
1025       b) echo the list of tested variables in the individual summary.txt of
1026          each experiment.
1027    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
1028      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
1029      (but still depend on the tile decompostion of the domain).
1030    o pkg/seaice: change a discretization detail to make the B-grid code
1031      "more symmetric". This change is likely to remove all "ridges/leads" that
1032      where quasi-aligned with the grid in B-grid solutions. It may also be
1033      the solution to the stress coupling issues with the B-grid.
1034    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
1035      remove .cvsignore from input dir. (since testreport no longer run here).
1036    o pkg/thsice:
1037     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
1038     - fix reshaping of sea-ice just after advection:
1039       melt all the ice only if ice-volume is too small.
1040     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
1041       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
1042     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
1043    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
1044      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
1045    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
1046      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
1047      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
1048      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
1049      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
1050      -> update output.txt
1051    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
1052     this affects truncation error: -> update output.txt of exp:
1053      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
1054      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
1055    
1056    checkpoint59f
1057    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
1058    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
1059      a bounded range (in forward mode)
1060    o pkg/ecco, ctrl, autodiff and mom_common:
1061     internal parameter controls, completements of implementations
1062    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
1063    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
1064      (not seem any difference in testing results).
1065    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
1066       at face corners.
1067    o pkg/generic_advdiff:
1068     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
1069      loop range indices for computing vertical advection tendency
1070      and do the calculation in the interior only (no overlap) ;
1071      for now, only implemented for SOM advection (to save CPU time).
1072     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
1073    o exch2 adjoint
1074      First set of changes:
1075      - add exch2 hand-written adjoint templates
1076      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
1077        This will require cleanup in pkg/autodiff/*.F
1078        (changed routines currently kept separate in verif. code/)
1079      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
1080        that used to hide exch2 or cubed-sphere specific code
1081        (commented via 'cph-exch2')
1082    o pkg/seaice
1083      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
1084    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
1085       output of global_ocean.cs32x15.thsice .
1086    
1087    checkpoint59e
1088    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
1089      for B-grid vector (not yet tested) and C-grid vector (<- only used
1090      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
1091    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
1092      (#ifdef ALLOW_SALT_PLUME)
1093    o gather_2d/scatter_2d: removed halo regions
1094    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
1095      scheme and the corresponding test case (under front_relax dir). For now,
1096      only available with Skew-flux form and not yet tested in realistic set-up.
1097      adjoint: store directives updated, but gradient checks deteriorated,
1098      so maybe GM/Redi adjoint is now broken.
1099    o seaice adjoint
1100      * add AREA, HEFF, HSNOW as control variable
1101        (should not change lab_sea results)
1102      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
1103    o pkg/seaice:
1104      * added computation of saltFlux in seaice_growth;
1105        For time being, sea ice salinity is assumed constant
1106        contribution of snow flooding to freshening of sea ice is neglected.
1107        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
1108        defaults to 0.0 in order to maintain backward compatibility.
1109        Typical values for SEAICE_salinity are 4 to 10 g/kg.
1110      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
1111      * added SEAICE_availHeatFrac, which specifies fraction of surface level
1112        heat content used to melt or grow ice
1113      * commented out cap of HICE: it helps keep ice thinner
1114      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
1115      * applied OBCS T/S mask to HEFFM sea ice mask
1116    
1117    checkpoint59d
1118    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
1119     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
1120     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
1121    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
1122     and change default value of parameter "GM_Small_Number";
1123     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
1124       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
1125       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
1126    o pkg/ecco: cost function when applying pkg/smooth to controls
1127    o pkg/ctrl: add forcingPrecond run time parameter
1128    o pkg/seaice:
1129     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
1130     - fix bug in metric terms of u-equation in LSR solver (implicit part),
1131       changes verification/lab_sea
1132     - rearrange implicit part of u-equation in LSR solver to make it easier to
1133       read, understand, and debug. This causes changes at the truncation level.
1134     - fix (serious) bug in the boundary conditions (sign error in the implicit
1135       part) of the LSR solver. Changes all LSR results.
1136     - fixed problem with HSNOW initialization to avoid thick snow when AREA
1137       is initilized with small values - does not change lab_sea results.
1138     - added HsnowFile initialization capability
1139    o pkg/smooth: addition to model/src and pkg/ctrl so allow
1140     initialization of pkg/smooth and application to control vector
1141    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
1142    o dependencies: pkg/profiles requires pkg/cal
1143    o pkg/profiles:
1144     - added option ALLOW_PROFILES_GENERICGRID
1145         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
1146         that interpolation information (grid points and coefficients) is provided
1147         within the netcdf input files.
1148         -> sample matlab scripts can be found in MITgcm_contrib/gael
1149         that allow you to prepare netcdf input files.
1150     - also modified: cleaner include statements, cleaner error print statements,
1151       cleaner stops when error, and more tests of the netcdf input files consistency.
1152    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
1153    o pkg/seaice:
1154     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
1155       requires a new routine: seaice_diagnostics_fill.F
1156     - make sure that seaice does not move if not forced (pressure replacement
1157       method, Hibler and Ip, 1995), changes results
1158     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
1159     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
1160       It is turned off by default (=-1.), because it changes the results.
1161     - make it possible to read AREA from a file, too.
1162    
1163    checkpoint59c
1164    o add S/R and diagnostics for oceanic mixed-layer depth
1165    o move GMRedi call after all vertical mixing schemes (including KPP)
1166    o pkg/thsice:
1167     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
1168      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
1169    o pkg/obcs:
1170     - bug fix for balance code
1171    o pkg/seaice:
1172      - allow values of SEAICE_elasticParm > 1
1173      - add new parameter SEAICE_evpTauRelax as an alternative
1174        to SEAICE_elasticParm
1175      - make lsr boundary conditions free slip (by default), changes result
1176      - add code for no slip boundary conditions for lsr
1177      - set minimum of zeta to zero (and not 4e8) (changes results)
1178      - add a cap on AREA after advecting AREA if seaice_growth is not called
1179    o change calculation of Visbeck K:
1180      - no longer depend on tapering scheme; instead, compute slope (limited
1181        by GM_maxSlope). this is equivalent to what was comuted before with
1182        clipping or linear tappering.
1183      - fix vertical averaging (wrong by 1/2 level)
1184      - leave the old version (but will not be maintained) within
1185        #ifdef OLD_VISBECK_CALC / #endif
1186      - update output of exp. ideal_2D_oce
1187    o change error catch in calc_r_star to improve vectorization
1188    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
1189      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
1190    o adjoint:
1191      Re-organized adjoint checkpointing according to Matt Mazloff
1192      (but with modifs/completions/cleanups)
1193      Storing is now bundled into large arrays to optimized I/O
1194      (and second step in cleanup of the_main_loop)
1195    
1196    checkpoint59b
1197    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
1198      - export/import (between ocean & coupler) fields needed for ocean DIC.
1199    o pkg/seaice:
1200      - get rid of three more exchanges seaice_calc_viscosities (required
1201        different loop boundaries in seaice_lsr and seaice_ocean_stress)
1202      - bug fix in seaice_ocean_stress (update of lab_sea required)
1203      - reduce loop boundaries to necessary minimum also in seaice_evp
1204      - go back to the old way of computing deltaC/Z as the adjoint likes that
1205        better
1206    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
1207      passive tracer to an Age Tracer) + update output.txt
1208    o pkg/exf:
1209      - implement A-grid / C-grid selection for wind-stress input files.
1210      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
1211      for now, in exf_bulk_largeyeager04.F only :
1212      - change implementation for case where windspeed + 2. components wind-stress
1213        are read-in. AND use rhoConstFresh to convert evap.
1214    o pkg/seaice:
1215      - use correct EXCH_UV for wind-forcing (on A-grid).
1216      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
1217        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
1218    o pkg/exf:
1219      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
1220      EXF_INTERPOLATION:
1221      - merge global_with_exf/code version of exf_interp_read.F
1222        to the main code ;
1223      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
1224        reading the file ; Important: This options needs to be defined to recover
1225        previous code.
1226        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
1227      - no longer loose real*8 precision along the way when using exf_iprec=64.
1228    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
1229      - change discretisation of evp-solver in order to avoid another exchange
1230        (changes lab_sea) and clean up a little
1231      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
1232        help the adjoint (this also changes the results slightly)
1233      - add a few "_d 0" where they had been missing in seaice_evp.F
1234      - cleaning up: remove unused seaice_calc_rhs.F
1235    o pkg/exf: some cleaning-up:
1236      - change various "constants" into runtime parameters
1237      - cleaned-up Large&Yeager04 routine which should eventually
1238        replace exf_bulkformulae.F (changed names of S/R and CPP)
1239        and merged various ALLOW_ATM_WIND options
1240     only used with thsice pkg (in thsice_get_exf.F):
1241      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
1242        which are used when useStabilityFct_overIce=TRUE (= the default)
1243      - change default values of ice & snow emissivity and scale downward LW
1244        by ice & snow emissivity.
1245    o pkg/thsice:
1246     fix few little problems, in thsice_calc_thickn.F:
1247      - growth vertically (and not laterally) if iceFrac == iceMaskMax
1248      - melt only laterally if hIce < hThinIce (as the comments say)
1249      and in thsice_extend.F:
1250      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
1251      - start to form ice as soon as the minimum ice-volume is reachable.
1252     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
1253      and cpl_aim+ocn
1254    o pkg/kpp
1255     - move computation of surface related input fields to KPP into a new
1256       subroutine kpp_forcing_surf.F
1257     - remove wrong (within bi,bj loops) EXCH calls.
1258     - little cleaning (add argument myThid in last position, cvs header ...)
1259     - for now, fix conservation problem by exchanging KPPviscAz (may not
1260       be the best fix)
1261    o pkg/seaice
1262     - check for inconsistent evp parameter/cpp-flag combination
1263     - remove leftover errIO flat for obsolete name list error handling
1264    o OpenAD
1265     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
1266    
1267    checkpoint59a
1268    o pkg/seaice: some parameter clarifications and a little bit of clean up
1269    o pkg/thsice: rename run-time parameters:
1270       himin       -> hIceMin
1271       himin0      -> hThinIce
1272       hihig       -> hThickIce
1273       i0          -> i0swFrac
1274       transCoef   -> bMeltCoef
1275       frac_energy -> fracMelting
1276      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
1277       with default values (for now) that do not change the results.
1278      remove old version of thsice vars advection in pkg/seaice.
1279    o in FFIELDS.h:
1280      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
1281      - make pLoad & sIceLoad always available (but still only used if
1282         ATMOSPHERIC_LOADING is #define).
1283    o pkg/kpp: replaced _KPP_RL with _RL
1284    o bug fixes for vertical diffusivity computations when both KPP and
1285        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
1286        are no longer updating the vertical diffusivity array
1287        (passed as argument) but are (re-) setting those arrays.
1288    o pkg/seaice: fix bug in evp solver, while doing that
1289      - change (improve?) discretization of stress computations for both
1290        cgrid-lsr and evp solver
1291      - add a new routine to compute strain rates
1292      - the above changes lab_sea results
1293      - add no slip conditions for evp solver (off by default), lsr-version
1294        may follow
1295      - fix exchange for shear at Z-points (does not change lab_sea)
1296      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
1297        (to force the user to pick a time step since there is not "safe" way
1298        of choosing it)
1299      - add principal stress diagnostics
1300      - rearrange fields for evp a little to avoid having to call a: too many
1301        exchanges and b: exchanges for stress trensor components which we do
1302        not have.
1303      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
1304        of evp, complete rewrite for lsr case (latter is does not yet work
1305        in all cases)
1306    o pkg/kpp: add code to have mixing in shelf ice caverns
1307      - add myThid to all kpp routines (long overdue)
1308    
1309    checkpoint59
1310    o pkg/exf:
1311      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
1312        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
1313      - move exf header files from lower_case.h to UPPER_CASE.h ;
1314        add missing cvs Header & Name
1315      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
1316      - add namelist param. selectStressGridPosition, exf_monFreq
1317      - retire many _CLIM routines, and remove data.exf_clim
1318        + params moved to data.exf
1319        + climsst, climsss now handled by exf_set_gen, i.e.
1320          climss?period=0 refers to constant field,
1321          climss?period=-12 to monthly forcing
1322      - split up namelists in data.exf
1323    o pkg/seaice:
1324      - remove seaice_exch and seaice_exch_uv
1325      - remove superfluous exchange of theta
1326      - add myThid to seaice_budget_ocean/ice
1327      - add new interface for atmospheric wind forcing (C-grid only)
1328        + new routine
1329        + two new field (taux, tauy for stress over ice)
1330        + removed one global field (DAIRN) for C-grid case only
1331    o pkg/thsise
1332      - 2nd set of modifs for thsice adjoint in conjunction with exf
1333    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
1334    
1335    checkpoint58y_post
1336    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
1337      vertical diffusivity, similar to that in MOM4; turned on using
1338      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
1339      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
1340    o Added capability for 3D specification of background vertical diffusion
1341      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
1342      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
1343      "data" file that contains the 3D vertical diffusivity coefficients.
1344    o ice dynamics (pkg/seaice) with thsice thermodynamics:
1345      - add code within pkg thsice to advect & diffuse sea-ice fields
1346      similar to (and will replace) what has been added in  seaice_advdiff.F,
1347      but: - conserving Mass, Heat & Salt.
1348           - better when using non-linear advection scheme (not yet fully tested)
1349           - can also be used in atmospheric set-up (for now, only the diffusion).
1350    
1351    checkpoint58x_post
1352    o IO option for global-file compact format:
1353      - add options when generating topology (utils/exch2/matlab-topology-generator)
1354      - add I/O capability (pkg/mdsio).
1355      - adapt utils/matlab/rdmds.m to read this format.
1356      for now long-line format not yet supported by pkg/mdsio (& exch2).
1357    o shelfice: add a few diagnostics
1358    
1359    checkpoint58w_post
1360    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
1361      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
1362      (and replace horiVertRatio in NH code).
1363      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
1364                         and tutorial_plume_on_slope (sensitive to truncation)
1365    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
1366      directly to drive seaice model (C-grid only)
1367    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
1368     - reintroduce computation of wind from stress,
1369     - compute tau (in exf_bulkformulae.F) from windstress averaged to
1370       mass points to avoid tau = 0
1371     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
1372    o rdmnc.m: make it work with "global" files created with gluemnc
1373    o rdmnc.m : some improvements in dealing with singleton dimension
1374      (tested on all testreport mnc output files).
1375    o genmake2: disable pkg/profiles if netcdf test fails.
1376    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
1377    o move call to cal_readparms up to make calendar parameters/variable available
1378      to all packages
1379    
1380    checkpoint58v_post
1381    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
1382      useDynP_inEos_Zc tested.
1383    o pkg/exf: changes to properly interpolate/mask/scale initial fields
1384    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
1385      and portions thereof.  See read_cs.txt for description and examples.
1386    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
1387      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
1388      following the great-circle arc between those 2 points.
1389    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
1390      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
1391    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
1392     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
1393     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
1394     - still needs work (not working with some options ; efficiency to improve)
1395       and serious testing.
1396     - use this scheme for temperature & salinity in 2 advection test exp.:
1397       advect_xy & advect_xz, respectively.
1398    
1399    checkpoint58u_post
1400    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
1401    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
1402    o testreport: add option "-skipdir" to skip some test.
1403    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
1404      momentum calculation.
1405    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
1406    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
1407      remove checkpoint.F and the_correction_step.F (no longer used);
1408      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
1409    o add option (linFSConserveTr) to correct for tracer source/sink due to
1410      Linear Free surface
1411    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
1412    o pkg/thsice: fix reading mnc-pickups
1413    
1414    checkpoint58t_post
1415    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
1416    o pkg/mdsio:
1417     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
1418       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
1419       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
1420     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
1421     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
1422       either MDS_READ_FIELD or MDS_WRITE_FIELD )
1423     - new S/R (to replace MDSWRITEMETA), which allows to write more
1424       informations (variable names, time ...) to meta files.
1425     - modify rdmds.m to give back the meta file content.
1426    o pkg/diagnostics: change vertical interpolation to be safer, and more
1427       flexible (define p-levels to interpolate to in data.diagnostics);
1428      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
1429       diagnostic pointer.
1430    o pkg/seaice: more cleaning up of seaice_growth, added many comments
1431    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
1432    o fix multi-category seaice:
1433     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
1434       SEAICE_MULTICATEGORY
1435     - fix short wave heat flux
1436    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
1437       and allow to use EVP solver. Change forward lab_sea: test both EVP
1438       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
1439    o Initial check-in of lab_sea adjoint
1440      (very similar to natl_box_adjoint/code_seaice)
1441      * used C-grid and EVP solver
1442      * used KPP, GM/Redi
1443      * uses inAdExact=.TRUE.
1444      * gradient checks fail for both ADM and TLM
1445        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
1446        f.d. gradients actually seem more problematic than ADM, TLM gradients;
1447        issue is related to forward mismatch between g77 an ifort
1448    o pkg/seaice: overhaul of thermodynamics
1449     - growth.F and groatb.F are replaced by new routine seaice_growth.F
1450     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
1451     - move a few global fields out of SEAICE.h into seaice_growth.F and
1452       make them 2D (FICE/QNETO/ ...)
1453     - remove FO (it is the same as QNETO)
1454     - introduce a few local fields to avoid modifying external fields such
1455       as atemp, etc.
1456    
1457    checkpoint58s_post
1458    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
1459      changed exf_set_gen.F so that
1460        genperiod=0 means input file is one time-constant field and
1461        genperiod=-12 means input file contains 12 monthly means
1462    o CG2D: use pre-computed solver main-diagonal (stored in common block);
1463      this affects truncation error ; generate new output file for exp. which
1464      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
1465        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
1466        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
1467        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
1468        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
1469        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
1470    o start implementation of deep-atmosphere and anelastic formulation
1471    o verification: remove 2nd copy of input files and use script "prepare_run"
1472      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
1473    o mom_common/vecinv/fluxform: fix a few initialisation isssues
1474    o profiles: fix for multithreaded case
1475    
1476    o diagnostics: rename few diags:
1477      s/'PRESSURE'/'RCENTER '/g
1478      s/'TICE    '/'oceFreez'/g
1479      s/'TAUX    '/'oceTAUX '/g
1480      s/'TAUY    '/'oceTAUY '/g
1481      s/'SWFLUX  '/'oceQsw  '/g
1482      s/DIFx/DFxE/g
1483      s/DIFy/DFyE/g
1484      and add few ocean-forcing diagnostics:
1485      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
1486    o modifications to pkg/seaice/growth.F and budget.F, which change results of
1487      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
1488      as actual snow thickness.  It now refers everywhere to effective snow
1489      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
1490    
1491    checkpoint58r_post
1492    o modifications to pkg/seaice/growth.F, which change results of
1493      lab_sea experiment: fixes pertain to melting snow over open water, to
1494      masking EVAP under sea ice, and to using the correct AREA variable for
1495      computations of EVAP, PRECIP, HSNOW, and GHEFF
1496    o add ability to read bathy, salt, and theta using MNC (off by def)
1497    o add flooding algorithm and advection of HSNOW for pkg/seaice;
1498      both are turned off by default and do no change any results
1499    o seaice advection with pkg/thsice: a step toward the use of non-linear
1500      advection scheme, but #ifdef or commented out for now (requires more EXCH).
1501    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
1502      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
1503      in natl_box (affects results @ truncation level: update output.txt)
1504    o multi-threading and IO:
1505      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
1506      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
1507        (needed to work with SingleCpuIO): tested in all verif. exp.
1508    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
1509      affects the results (but none of the verification test uses this scheme).
1510    o Adding some pkg/diagnostics capability to pkg/seaice
1511      (will certainly be subject to changes)
1512    o ctrl: adding new control variables:
1513      lwflux, lwdown, evap, snowprecip, apressure, runoff
1514    
1515    checkpoint58q_post
1516    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
1517      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
1518      high_res_cube configuration by 4% on Columbia.
1519    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
1520      add (in global_with_exf/code) a version of EXF_INTERP_READ without
1521      dynamical allocation (seems to work in multi-threaded).
1522    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
1523      single CPU io) so that TAF does not have to see EESUPPORT.h
1524    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
1525    
1526    checkpoint58p_post
1527    o obcs: stop if obcs is used with useCDscheme = .true.
1528    o shelfice:
1529     - fix a sign error so that no slip at shelfice interface works
1530     - remove stop for combination non-hydrostatic code and shelfice. That does
1531       not mean, that the results are correct, but at least they are numerically
1532       stable
1533    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
1534    o added adjoint exch routined for all exch*3d* routines
1535      and updated flow directives
1536    
1537    checkpoint58o_post
1538    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
1539      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
1540    o change controling S/R for writing pickup file (new S/R do_write_pickup)
1541      and clean-up reading/writing of pickup files.
1542    o fix local version of read/write pickup (NH part) in rotating_tank/code
1543    o simplify EXCH interface:
1544     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
1545     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
1546    o added the regrid package
1547    o shelfice:
1548     - add a simple boundary layer scheme to reduce noise
1549     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
1550    
1551    checkpoint58n_post
1552    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
1553       local variable (not in common block).
1554    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
1555      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
1556      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
1557        to work with SingleCpuIO.
1558    o add "_d 0" to real constant of pkg/cfc subroutines ;
1559       update exp. cfc_exemple & tutorial_cfc_offline output files.
1560    o multi-threading and IO:
1561      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
1562        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
1563      - barrier before and after reading.
1564      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
1565      - avoid using MDS_WRITELOCAL for LAND pkg output.
1566      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
1567        common-block variables ; Allows multi-threading with master-thread IO.
1568    o change default MAX_NO_THREADS from 32 to 4 ;
1569      and stop cleanly when MAX_NO_THREADS is too small.
1570    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
1571    
1572    checkpoint58m_post
1573    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
1574       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
1575    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
1576       keep global_ocean.90x40x15 (for AD testing) with former secondary test
1577       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
1578    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
1579        add MITgcm_tutorials (= code + all the tutorials)
1580    o ecco, option to compute cost for total ssh (mean+anom)
1581    o consistent with addition of ptracer and ssh in pkg/profiles
1582    o profiles: adding ptracer and ssh
1583    o testreport: change multi-test output-file name
1584      (from output.txt.{name} to output.{name}.txt)
1585    o profiles: now ok for mutli-tiles case
1586    o seaice: add 4 parameters for different advection schemes for area,
1587      (effective) seaice thickness, enthalphy, and snow height. Their default
1588      is the standard parameter SEAICEadvScheme
1589    o calc_gw:
1590     - add cosFacU in zonal viscous flux (harmonic.visc.).
1591     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
1592       of tutorial_plume_on_slope.
1593    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
1594    o calc_gw: true flux-form, account for horizontal grid spacing.
1595      update rotating_tank results, but not plume_on_slope (affected at
1596      truncation level, 11 digits).
1597    
1598    checkpoint58l_post
1599    o calc_gw:
1600     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
1601     - remove side-drag for now (need to fix it); update plume_on_slope results.
1602     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
1603    o commit code to make SST/SSS weights spatially variable
1604      (based on either variable in-situ or variable initial T/S weights)
1605    o pkg/ecco:
1606      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
1607        now based on horizontally varying weights wthetaLev, wsaltLev
1608      * cost_averagesflags now returns year indices in addition to day, month
1609      * sflux balance is performed on annual basis
1610        (sflxumm, sfluxmm2, bal_sfluxmm)
1611      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
1612        including separate counting and multipliers
1613    o pkg/rbcs
1614      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
1615    
1616    checkpoint58k_post
1617    o testreport:
1618     - always build in dir. "build" (if not there, mkdir build instead of building
1619       & running in input)
1620     - run in dir run (if it exists), in build otherwise.
1621     - call prepare_run (if input/prepare_run exists)
1622     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
1623    o pkg/exf modifications to interpolation and rotation routines for more
1624       reasonable treatment of North Pole singularity: for tracers North Pole
1625       value is set to northernmost zonal-mean value, for zonal velocity it is
1626       set to zero, and for meridional velocity it is set to northernmost value.
1627    o pkg/exf/exf_check_range.F
1628     - add tile index to diagnostics and move stop statement to the very
1629       end of the routine.
1630    o pkg/diagnostics: (diagnostics_main_init.F)
1631      define title of isomorphic variables according to the current config.
1632    o pkg/thsice with pkg/seaice dynamics:
1633    - fix domain of computation (interior only, required for exf) and do exchanges
1634    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
1635    o towards a standard way of dealing with multi-threading in MONITOR
1636      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
1637    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
1638       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
1639    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
1640    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
1641    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
1642       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
1643    o tracer advection:
1644     - clean-up and simplify calc_common_factors.F
1645     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
1646       advection subroutine (but still not used within DST advection S/R)
1647    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
1648    
1649    checkpoint58j_post
1650    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
1651      from file (collects calls previously in FORWARD_STEP)
1652    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
1653    o adjoint store dir. adjusted accordingly
1654    o genmake2
1655      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
1656    
1657    checkpoint58i_post
1658    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
1659      on wind stress (SEAICEstressFactor defaults to 1.)
1660    o Total number of Timers is finite (<=40): comment out 2 non-essential one
1661      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
1662    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
1663      on CS-grid: no longer loosing mass.
1664    o exf & curvilinear-grid: no longer modify longitude xC & xG.
1665    o pkg/ggl90: fix sloppy output and fix a bug
1666    o pkg/seaice: added SEAICEuseEVPpickup parameter
1667      - Set to false in order to start EVP solver with
1668        non-EVP pickup files when using SEAICEuseEVP
1669      - fix sign error in diffusion in seaice_calc_rhs
1670    
1671    checkpoint58h_post
1672    * Modifications for bottom topography control
1673      o replace hFacC by _hFacC at various places
1674      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
1675      o add non-self-adjoint cg2d_nsa
1676      o update autodiff support routines
1677      o re-initialise hfac after ctrl_depth_ini
1678      o works for 5x5 box, doesnt work for global_ocean.90x40x15
1679    * Adding verification for 5x5 box (4-layer) bottom topography control
1680    
1681    checkpoint58g_post
1682    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
1683       used for mean seasonal cycle, mean diurnal cycle); add an example
1684       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
1685    o pkg/ggl90:
1686      - add parameter (minimum surface kinetic energy)
1687      - fix bug (avoiding division by zero)
1688    o couple pkg/thsice to pkg/seaice:
1689      - modify advection in seaice to accomodate new scalar fields to be advected
1690      - only muliDimAdection scheme work with seaice/thsice
1691      - mapping of thsice-variables to seaice-variables, back and forth
1692      - does not break the verification experiments, but does not give the
1693        desired results either
1694    o pkg/seaice
1695      - make (default) second order advection a bit less confusing?
1696    
1697    checkpoint58f_post
1698    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
1699      to pkg/seaice):
1700      - new routines thsice_map_exf and thsice_get_exf provide the interface
1701      - add an additional formal parameter to thsice_solve4temp
1702    o pkg/exf:
1703      - add new fields wspeed, snowprecip (to be able to couple to thsice)
1704      - correct Stefan-Boltzmann constant
1705      - new parameter for longwave surface emittance
1706      - separate some stuff from exf_bulkformulae into new routines  
1707        exf_radiation, exf_wind
1708      - add new parameters and constants: longwave emissivity for ocean, ice
1709        and snow, evaporation parameters over ice
1710      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
1711        either wind from stress or stress from wind
1712    o pkg/thSIce:
1713    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
1714    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
1715       and THSICE_CALC_THICKN
1716    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
1717    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
1718      to make debugging easier.
1719    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
1720    o pkg/bulk_force:
1721      - clean-up comments and parameters ;
1722      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
1723    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
1724      generate new output for test-experiment: aim.5l_cs.thSI
1725    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
1726      testreport accordingly
1727    
1728    checkpoint58e_post
1729    o SEAICE_CGRID adjoint done
1730    o R_STAR adjoint implemented.
1731      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1732      * need to sort out init. of h0facc, etc.
1733    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1734      to be able to use it in pure forward.
1735    
1736    checkpoint58d_post
1737    o upgrade simple test-experiment to tutorial example:
1738     step.1: duplicate the experiment and (step.2) will remove the old copy.
1739      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1740      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1741      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1742      tutorial_global_oce_biogeo    <- copy of dic_example
1743      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1744      tutorial_plume_on_slope       <- copy of plume_on_slope
1745      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1746      tutorial_global_oce_optim     <- empty for now (David ?)
1747      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1748     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1749    o correct a sign problem in cost_scat.F
1750    o obcs and ptracers: fix boundary conditions for advections schemes
1751      with larger stencil
1752    o thsice adjoint: start
1753    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1754      completeness
1755    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1756      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1757    o ptracers adjoint:
1758      * avoid extensive recomputatations
1759      * fix missing re-init. of gptr (missed by TAF)
1760    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1761      me to turn off the excessive output to STDOUT that this package produces
1762    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1763      and add those terms in Vector-Invariant formulation.
1764    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1765      if the control period (xx_hfluxperiod etc) is 0
1766    o in profiles pkg, clean routines and fix details
1767    o in ecco pkg, reading ssh data:
1768      fix problem in case the model does not start at iter0=0
1769    o fix mnc-pickup/restart for ptracers
1770    o new package prifiles:
1771      code to compute profile-based cost by Gael Forget
1772      (modifs in ecco, ctrl, autodiff)
1773    o Benign bug fix in initialization (spotted by M. Mazloff) of
1774      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1775    
1776    checkpoint58c_post
1777    o adjoint: finish NLFS adjoint and provide reference output in
1778      verification/global_ocean.90x40x15/results_ad_nlfs
1779    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1780      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1781      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1782      with SEAICE_CGRID defined.
1783    o move calendarDumps from "data" to "data.cal" and clean-up the code
1784      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1785    o add useEXF & useCAL flags (for now, set in hard-coded way)
1786    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1787      (were missing in NH mode, and wrong in quasihydrostatic mode).
1788      waiting for Chris updated version of calc_gw to add those CALLs.
1789    o fix bug in quasihydrostatic S/R ;
1790      add a test for this option: global_ocean.90x40x15.qshyd
1791    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1792      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1793    o add on/off flag useOffLine for package OFFLINE
1794    o seaice:
1795      - modify advection so that it works also on the C-grid
1796      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1797        problem in multi-tile runs with C-grid
1798      - add flags for clipping ice velocities and/or masking solver forcing
1799      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1800        C-grid solver
1801      - added a few comments to seaice_diffusion.F
1802      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1803        are now exclusive)
1804      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1805        required re-ordering the code a little:
1806       + make DAIRN global variable (defined in SEAICE)
1807       + move computation of the viscosities eta and zeta into a new separate
1808         routine (because I need to recompute them in seaice_ocean_stress.F)
1809    
1810    checkpoint58b_post
1811    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1812      update output.txt of exp. aim.5l_cs.thSI
1813    o various mnc cleanups and improvements:
1814      + shrink lookup tables by factor of ~4
1815      + better error reporting when running out of lookup space
1816      + able to handle longer path/file names (up to 500 chars)
1817    o adjoint:
1818      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1819      - TBD: "hidden" mom_vecinv recomp. in dynamics
1820    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1821     (allow to differentiate between forcing components using new integer flags:
1822      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1823     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1824    o ecco
1825      - enable trend removal from SSH anomaly obs.
1826    o adjoint
1827      - a fix for PmEpR when #undef EXACT_CONSERV
1828      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1829      - try to fix "hidden" recomp. in forward_step for NLFS
1830        (NLFS seems broken sometimes after I checked it in)
1831    o seaice:
1832     - add c-grid version of the dynamic solver:
1833       + three new routines that are the c-grid substitute lsr, dynsolver
1834         and ostres
1835       + put a few fields that were local to dynsolver into global common
1836         blocks, so that I can move the computation of stresses etc into
1837         seaice_lsr (saves coding but may break the adjoint).
1838     - replace more hardwired parameters by runtime parameters
1839     - add ice masks that mask the rhs of the implicit solvers where there
1840       is no ice (commented out in seaice_dynsolver, because i am not sure
1841       if this works properly), eventually this should replace the clipping
1842       of ice velocities in seaice_dynsolver to +/-40cm/s.
1843    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1844      include it only where its needed
1845    o move balancing of fluxes before the call of external_forcing_surf
1846    o seaice:
1847      - correct units of turning angles (now they are really in degrees)
1848      - move computation of GWATX/Y out of main routine into dynsolver
1849      - initialize GWATX/Y in seaice_init
1850    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1851      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1852    o seaice: add runtime flags for turning angles (default to zero)
1853    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1854      and trend from exf forcing and ctrl control adjustments
1855    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1856      (since checkpoint57x_post)
1857    o change the default rotation period to 86164.s = the Earth rotation
1858    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1859      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1860    o seaice advection: add code for choosing between the default (2nd order
1861      central differences) and multiDim advection schemes provided by
1862      pkg/generic_advdiff
1863    o seaice:
1864      - removed all references to SEAICE_GRID.h fields from
1865        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1866        (cubed-sphere configuration will change a little)
1867      - grid computations in seaice_init are obsolete now.
1868      - cleaned up code a little so that is easier to read (hopefully).
1869      - added new (better?) discretizations of default advection and diffusion
1870        (turn on with SEAICEuseFluxForm)
1871      - replace 1 in 3d global fields by kSurface in growth.F
1872      
1873    checkpoint58a_post
1874    o seaice:
1875      - bug fix in advect.F
1876    o shelfice:
1877      - separate shelfice load anomaly from pload (breaks with time
1878        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1879        Its default is 0., but it may be computed more cleverly from (unknown)
1880        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1881        done offline. A good approximation of the pressure load anomaly is
1882        necessary to avoid large initial adjustment processes underneath
1883        deep-reaching shelfice.
1884      - small fix in ISOMIP shelfice_thermodynamics
1885      - add more sophisticated thermodynamics of Hellmer (1989), this is
1886        now the default
1887      - give a few constants more intuitive names
1888    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1889      if bulk formulae are used in long integration (especially EmPmR). Turn
1890      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1891      if balancePrintMean, the imbalance that is substracted is printed to
1892      STDOUT.
1893    o fix bug (typo) in obcs_apply_eta.F
1894    o add a new package shelfice which enables us to model the circulation
1895      underneath shelf-ice with draughts of hundreds of meters.
1896     - works
1897     - to do: + include improved thermodynamics
1898              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1899                instead of new field kTopC
1900              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1901                instead of new field R_shelfIce and new code in ini_depth.F
1902                and ini_mask_etc.F?
1903              + adjust vertical mixing schemes?
1904    o seaice pkg:
1905     - add a cpp-flag to include a simple formula for a salinity dependent
1906       freezing point of sea water at the surface
1907     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1908       meridional stresses are now different (and hopefully correct)
1909    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1910       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1911       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1912    o pkg/diagnostics: add options and parameters for regional-statistics
1913       diagnostics ; define regions by reading a region-mask from a file
1914       (might add other options later)
1915    o pkg/bulk_force:
1916     - add option and parameters to use AIM surface-flux formulae.
1917     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1918       others forcing fields (defined in PARM05, parameter file "data") are loaded
1919       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1920     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1921     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1922     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1923       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1924     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1925    
1926    checkpoint58
1927    o add "--embed-source" option to genmake2 which, when the supporting
1928      tools can be compiled (as determined by genmake2) will turn on the
1929      embed_files package which then embeds the entire MITgcm source code
1930      (*.[fFhc] + Makefile) used for the build within the executable
1931      - requested by CNH but off by default
1932      - adds a paltry <9MB to the mitgcmuv executable in most cases
1933      - only writes the output when useEMBEDSRC in eedata is true
1934    o clean up 3-dim. relaxation codes:
1935      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1936      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1937      * Thanks to Tom Haine for testing!
1938    
1939    checkpoint57z_post
1940    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1941      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1942    o fix the pickup behavior for obcs in combination with ptracers
1943    o fix a bug in ptracers_external_fields_load
1944    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1945      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1946    o transfered surface NH pressure to eta field (if exactConserv).
1947    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1948         and update lab_sea output.txt file.
1949    o completing 3-dim. relaxation code: additional term
1950         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1951      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1952      * At compile time, in "EXF_OPTIONS.h" set
1953          #define  ALLOW_CLIMTEMP_RELAXATION
1954          #define  ALLOW_CLIMSALT_RELAXATION
1955      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1956          tauThetaClimRelax3Dim = 15552000.0,
1957          tauSaltClimRelax3Dim  = 15552000.0,
1958      * 3 cases:
1959          1) Use a constant-in-time 3-dim. field
1960          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1961          3) Real-time relax. to time-evolving prescribed field
1962    o Adding Laplacian-type smoothness constraint on
1963      initial and boundary (forcing) controls (ic, bc)
1964      * enable at compile-time via
1965        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1966      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1967      * Absolute scale somewhat unclear so far
1968      * no area weighting was included since no other cost term does so far
1969    
1970    checkpoint57y_post
1971    First step for a NLFS adjoint
1972    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1973    o new init. routines for calc_r_star, calc_surf_dr
1974    o still need to deal with ini_masks_etc
1975    o testreport seemed happy
1976    checkpoint57y_pre
1977    
1978    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1979    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1980    o add new offset feature to offline pkg (plus minor cleanup)
1981    o cfc fixes for final year of integration
1982    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1983      be in GCHEM_OPTIONS).
1984    
1985    checkpoint57x_post
1986    o fix testreport Pb in multiple test experiment.
1987    o cleanup our namelist syntax in verification:
1988      - make it more F95 standards compliant (some work still needed)
1989      - allows the vast majority of our tests to work with gfortran
1990    o Non-Hydrostatic:
1991     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1992     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1993    o Allow to apply AB on T,S rather than on AB(gT,gS):
1994     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1995     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1996       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1997     - need a "clever" read_pickup to restart from the other AB formulation
1998    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1999    o remove some unused variables (reduces number of compiler warnings)
2000    o adjoint
2001      * Disable useVariableViscosity for adjoint for time being
2002        (there are a number of extensive recomputations)
2003      * Initialize certain variables needed for adjoint
2004    
2005    checkpoint57w_post
2006    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
2007                 fix the singleCpuIO RS version of MDSWRITEFIELD
2008       and add a WARNING if using globalFiles=T with multi-processors.
2009    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
2010      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
2011    o tracer advection scheme:
2012      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
2013       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
2014       was not very convenient).
2015      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
2016       (further tests needed for the implicit DST & Flux-Limiter schemes).
2017    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
2018      and sRef for convenience, handy, when you want to initialize
2019      ptracers in a large domain with a constant non-zero value. Also,
2020      untangle ptracers_init.F a little.
2021    
2022    checkpoint57v_post
2023    o change dome exp. to use variable viscosity in side-drag terms.
2024    o remove all the files from the cfc_offline test since they are now
2025      incorporated into tutorial_cfc_offline which has been producing
2026      identical results for a few days of testing
2027    o add new parameter: sideDragFactor to enable half-slip-side BC
2028      and change side-drag S/R to use viscosity from mom_calc_visc
2029      (can switch back by setting sideDragFactor=0.); affects results at
2030      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
2031       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
2032    o vorticity & strain are now computed without masking, to account for
2033      no-slip-side BC in variable viscosity calculation ; mask is applied
2034      anyway later on, before computing advection/coriolis terms.
2035    o modify exp4 to test new obcs support for reading from external files
2036      and for passive tracers
2037    o fix behavior of ptracers_monitor when monitor output is written to a
2038      netcdf-file; still not independent of monitor.F (writes in the same
2039      file).
2040    o change default value of tRef (put a uniform, meaningful value for ocean
2041      & atmos) and initialize sRef (was missing, as Martin mentioned).
2042    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
2043      to be proportional to enstrophy dissipation length.  Thus,
2044       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
2045      This is now consistent with Smagorinsky and with the manual.
2046    
2047    checkpoint57u_post
2048    o OBCS and PTRACERS: add open boundary support for passive tracers
2049      - either use homogenous (pseudo) v.Neumann conditions or prescribe
2050        OB-values from file; this is not different from the way theta and salinity
2051        are treated
2052      - however, Orlanski-radiation conditions are not supported, and the model
2053        will stop if you use pTracers and Orlanski at the same time.
2054      - beefed up the rountine obcs_external_fields_load: now only those open
2055        boundary values are overwritten with values from files for which there
2056        are really files, otherwise the OB-fields remain untouched. This makes
2057        it possible to use different OBs at different ends of the domain (as
2058        with EXF)
2059    o reduce number of exch calls in shap_filt (s2).
2060    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
2061      truncation level) 4/5 MLAdjust test results (11&12 digits match).
2062    
2063    checkpoint57t_post
2064    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
2065    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
2066      same truncation, independent of the face number: affects affects several
2067      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
2068    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
2069      note that biharmonic viscosity + no-slip was not tested in any experiment.
2070    o fix bug in non-linear free-surf side-drag ; generate new output for
2071      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
2072    o make mnc honor the writeBinaryPrec flag for most kinds of output
2073    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
2074    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
2075      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
2076    o add brackets in multi-terms sum to get same truncation, independent of
2077      the face number (manage to get exactly same value of gU,gV at the cs-edge)
2078      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
2079    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
2080      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
2081      a maximum grid-scale Reynolds number.  Also, changes all length calculations
2082      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
2083      Suggested values of viscosity parameters found in mom_calc_visc.
2084      Many new viscosity diagnostics available.
2085    
2086    checkpoint57s_post
2087    o Add clearing-house for viscosity calculations, mom_calc_visc and
2088      correct numerous bugs in LeithD and Smagorinsky discretizations.  
2089      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
2090      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
2091      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
2092      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
2093      The Strain-Tension form is now called with useStrainTensonVisc=.true.
2094      ViscAhStrain and viscAhTension are now retired.
2095    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
2096    o In response to JMC's bug report, genmake2 now ignores any soft-links
2097      that it finds in the *current* directory when searching for files.
2098      Soft-links found in any other source directories will still work as
2099      they did before.
2100    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
2101      a C routine to unlimit the stack size
2102    o mnc-ify pkg/aim snapshot vars
2103    o mnc-ify pkg/land as requested by Daniel
2104    o various changes to mnc including:
2105      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
2106      - output can now be grouped so that all files within a group
2107          change the ITER portion of their names in lock-step together
2108      - can now read ("global") PER-FACE (in addition to PER-TILE) files
2109          and works with both EXCH1 and EXCH2 (but needs more testing)
2110      - writing works for all verification test cases w/ g77 on Linux
2111    
2112    checkpoint57r_post
2113    o make MNC variable initialization happen earlier
2114    o add diagnostics for (almost) each term of the momentum Eq.
2115    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
2116    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
2117    o remove MINIMAL_TAVE_OUTPUT option ;
2118      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
2119    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
2120      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
2121    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
2122    o add time-dependent SST, SSS control
2123    o cost terms in ecco/ modularized (new cost_generic.F)
2124    o cost_averages routines are modularized (new cost_averagesgeneric.F)
2125    o new infrastructure for seaice model vs. obs misfits in seaice/
2126      * driver from the_main_loop.F is seaice_cost_driver.F
2127      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
2128      * gradient check in Exp. 6a of natl_box_adjoint/
2129    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
2130      (see README file)
2131    
2132    checkpoint57q_post
2133    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
2134    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
2135      - bug was reported by Jean-Michel and Ian Fenty
2136    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
2137      update exp. cpl_aim+ocn output.
2138    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
2139      Needed for high-res. runs with large global files
2140      to be able to limit tapelev size
2141    o Changed some tests for adjoint:
2142      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
2143      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
2144      * global_ocean.90x40x15/ back to default 3-level checkpointing
2145    o Modifications to enable scripted COMMON to MODULE conversion
2146      * verification/OpenAD/code/ has necessary scripts and description;
2147      * converts, compiles and runs successfully;
2148    
2149    checkpoint57p_post
2150    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
2151    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
2152      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
2153    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
2154    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
2155      (was already the case for dissipation with mom_vecinv,
2156       and also the case for grad.PhiHyd when staggered-timeStep)
2157      This will allow to put dissipation out-off the AB time-stepping.
2158     Unfortunately, affects truncation error. Update output of exp. that "fails"
2159      (cg2d matching number) and leave the others for later: front_relax(10),
2160      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
2161      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
2162    
2163    checkpoint57o_post
2164    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
2165      (2) its ready to be documented during the 20050801 DocFest
2166    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
2167      for ideal_2D_oce and lab_sea on linux_ia32_g77
2168    o set to #undef CTRL_SET_OLD_MAXCVARS_30
2169      in global1x1_tot/code_seaice_adj to access indices 32, 33
2170      (worth another tag)
2171    
2172    checkpoint57n_post
2173    o adding precip control xx_precip 32
2174    o adding swflux control xx_swflux 33
2175    o Replacing 10 forcing penalty cost routines by 1 generic.
2176    o Implementing partitioning in time-mean and variable adjustment
2177      for atmos. state.
2178    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
2179    o in natl_box_adjoint:
2180      * updated exp 1 to 10
2181        (but does not have time-mean vs. variable split results yet)
2182    o updated global1x1/*_seaice_adj/
2183      to incorporate latest changes
2184    o enable useSingleCpuIO for mdsio vector routines
2185      (applies in particular to tapelev I/O)
2186    o removed inefficient K-loop in all active_file*control*.F
2187    
2188    checkpoint57m_post
2189    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
2190      and advect_cs (use EXCH-2 and standard cs-32 grid files).
2191    o pkg/exch2: filling of face-corner halo regions is optional
2192      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
2193    
2194    checkpoint57l_post
2195     tag before updating tutorials (pre-release-2)
2196    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
2197       for output and interpolation of input fields onto model grid)
2198    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
2199       Affects results of exp. rotating_tank ; update output.txt.
2200    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
2201          and taking the square quantity and/or using a fraction-weight field.
2202    o fix aim_diagnostics_init.F mate numbers.
2203    o add mnc output capability to diagnostics/diagstat and update
2204      our cvsignore files for the ACSII output generated
2205    
2206    checkpoint57k_post
2207    o lab_sea now uses diagnostics package and provides a suite of
2208      new EXF diagnostics output.
2209    
2210    checkpoint57j_post
2211    o exf
2212      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
2213        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
2214        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
2215      * extended diagnostics output
2216        - now includes all EXF variables
2217        - hs, hl moved to common block
2218        - separate S/R for diagnostics, called after ctrl vector is added
2219        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
2220        - EXFqnet contains true Qnet (i.e. includes qsw)
2221      * updated verif. lab_sea, global_with_exf
2222      * Rearranging hflux (exf_mapfields -> exf_getforcing)
2223        to ensure that diagnostics sees a true EXFqnet
2224    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
2225    o diagnostics pkg: change pointers so that 1 diagnostic can be used
2226      several times with different frequencies.
2227    o mnc-ify the thsice package as requested by Daniel Enderton
2228      - the monitor--MNC output needs work
2229      - many attributes need to be added (most are currently blank)
2230    o mnc-ify theaim_v23 package as requested by Daniel Enderton
2231      - many attributes need to be added (most are currently blank)
2232    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
2233    o add Sadourny like discretization to the 4th.O vorticity advection scheme
2234    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
2235      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
2236         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
2237    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
2238     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
2239    
2240    checkpoint57i_post
2241    o Diagnostics package was changed: diagnostic allocation is now deactivated
2242      by setting an empty file name in the namelist (used to be by setting 0 frequency)
2243    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
2244      add 1rst Order upwind vertical Shear.
2245    o add a quick fix for A/B checkpointing in OFFLINE mode
2246    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
2247      end-run around the C/Fortran linking horror in eesup/src/timers.F
2248    o added pkg/runclock: allows user to terminate run based on wall clock
2249    o added non-hydrostatic scaling parameter: nh_am2
2250    o pkg/my82: futile attempt to make results compiler-independent by adding
2251      some "_d 0", etc. no effect.
2252    o for mnc output, fill the 'T' coordinate var with myTime and create a
2253      separate 'iter' variable for iteration count
2254    o pkg/diagnostics:
2255      add new capability: output of Global/Regional & per-level statistics ;
2256      tested against monitor output (including land & thSIce) on various exp.
2257    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
2258    
2259    checkpoint57h_done
2260      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
2261      data.diagnostics, data.gchem, data.ptracers) is done.
2262    
2263    o pkg/diagnostics: prepare for Global/Regional statistics.
2264      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
2265    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
2266      and rename it: DIFFERENT_MULTIPLE
2267    
2268    checkpoint57h_post
2269    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
2270    o pkg/diagnostics: change output frequency, now in seconds (instead
2271      of Nb of iterations). This requires to change data.diagnostics.
2272    checkpoint57h_pre
2273    
2274    o in mnc, let the user create the output dir if both mnc_outdir_date
2275      and mnc_outdir_num are false
2276    o add fflags() to pkg/diagnostics which allows one to specify, on a
2277      per-file basis, the file precision [default behavior is unchanged]
2278    o added diagnostics to pkg/kpp, including computation of mixed layer
2279      depth based on a temperature/density criterion
2280    o updated verification/natl_box to test the new pkg/kpp diagnostics
2281    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
2282    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
2283    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
2284      not mnc -- this mistake was found by JMC and is now corrected
2285    
2286    checkpoint57g_post
2287    o add Adams-Bashforth 3rd Order time stepping:
2288      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
2289      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
2290    checkpoint57g_pre
2291    
2292    o make lambda[Theta,Salt]ClimRelax spatially varying
2293      (default remains spatially uniform constant based on tau)
2294    o added new control variables
2295      * init. uVel, vVel, etanN
2296      * lambda[Theta,Salt]ClimRelax
2297    o separate masks used for ctrl_pack/unpack 'from write_grid' output
2298      (suggested by G. Forget)
2299    
2300    checkpoint57f_post
2301    o add parameter "baseTime" = model base time = time at iteration zero
2302      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
2303      account for baseTime shift
2304    o move Coriolis arrays from PARAMS.h to GRID.h
2305    checkpoint57f_pre
2306    
2307    o mnc-ifying the seaice package
2308    o introduced an alternative length scale calculation for use in the limiting
2309      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
2310    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
2311    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
2312      as well as grad(vort3).  Made it compatible with both approximate form
2313      for the cubed sphere and full form of these gradients.  Added flag
2314      useFullLeith to select between approximate and full form.  
2315    o add "d0" in getcon.F to reduce differences between compilers/platforms
2316      update output.txt of exp. fizhi-gridalt-hs
2317    o change port_rand funtion to allow to set the seed.
2318    o fix obscure MNC bug involving conversion between reals and integers
2319      - it caused no problems with certain (eg. gcc, ifc) compilers but the
2320        new version is now more standards-compliant
2321    o adjoint-related modifications
2322      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
2323      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
2324      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
2325    
2326    checkpoint57e_post
2327    o Adding eddy stress controls a la Ferreira et al.
2328    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
2329    
2330    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
2331      update output.txt of exp. fizhi-gridalt-hs
2332    o add more "Z" dimensions and associated coordinate vars to MNC
2333    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
2334    o parameter calendarDumps: when set, approximate months (30-31 days) and years
2335      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
2336      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
2337      months and years.  Requires pkg/cal.
2338    o diagnostics: add pickup functionality
2339      - off by default for backwards compatibility
2340      - current version only uses MDSIO -- MNC will be added
2341    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
2342    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
2343    
2344    checkpoint57d_post
2345    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
2346    o modify verification/ideal_2D_oce so that it tests the creation of mnc
2347      output from the diagnostics package
2348    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
2349    o make genmake2 more portable by using ".$FS" instead of ".f" for more
2350      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
2351    o add coordinate variables to the MNC output from the diagnostics package
2352    o change MNC-flags default value: true when useMNC=TRUE
2353    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
2354      the ability (off by default) to read the grid information using MNC
2355    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
2356    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
2357    o do snap-shot diagnostics at the middle of the time-interval (instead of
2358      at the end).
2359    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
2360      new test for AIM with thSIce + slab-ocean
2361    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
2362    o move state variable diagnostics to the beginning of the time step ;
2363      (note: still needs some work specially for snap-shot diagnostics)
2364      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
2365    
2366    checkpoint57c_post
2367    o Change testing option (-ieee) to get closer agreement between g77 & ifort
2368    o generate new output.txt files on faulks with g77 & the new -ieee option
2369    checkpoint57c_pre
2370    
2371    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
2372      update output.txt of exp. global_ocean.90x40x15
2373    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
2374      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
2375    o add saltFlux(+File) forcing capability with periodicExternalForcing
2376    o allow to use pkg diagnostics for GM-Redi & ThSIce output
2377    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
2378    o improvements for the MNC output from DIAGNOSTICS:
2379      - correct handling of the unlimitied dimension
2380      - all dims now have associated coordinate variables
2381      - variables located at U, V, and Corner ("Z") points are now written
2382        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
2383        *all* data points are output
2384    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
2385    o added pkg/seaice/seaice_monitor.F
2386    o mdsio_readfield.F can now read files visible only to master MPI process.
2387    o pkg/seaice: some test code for ice-modified ocean stress
2388    o exf_getffields interpolation defaults to bilinear for all scalar forcing
2389      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
2390      spurious negative numbers for precipitation and humidity.  Will cause
2391      some small numerical differences for integrations using pkg/exf/exf_interp.F.
2392    o pkg/ctrl/
2393      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
2394        May be enabled via doPackDiag
2395      *  introduce z-scaling of
2396         + gradient (doZscalePack) and
2397         + control (doZscaleUnpack)
2398    o pkg/mdsio/
2399      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
2400      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
2401    
2402    checkpoint57b_post
2403    o simplify options in diagnostics_fill arguments (remove weird combinations)
2404    o fix MNC coordinate variables so that they now contain per-face index
2405      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
2406      general, EXCH2 grids are only aligned to a "local" coordinate system
2407    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
2408    o Implement instantaneous output within pkg diagnostics:
2409      setting a negative frequency in data.diagnostics produces
2410     "snap-shot" output (as opposed to time-average if freq > 0)
2411    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
2412      NOTE: change ptracer diagnostics name: use 2 characters to work with
2413            more than 9 tracers. Add also diagnostics of advect & diffus flux.
2414    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
2415      becomes the coordinate variable for the 'T' dimension
2416    o add CF-style coordinate variables to MNC
2417      - just a first cut:  numbers are meaningless on the cubesphere and
2418        missing along the T axis but otherwise it works!
2419    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
2420    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
2421    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
2422      this is based directly on what the model compute, so that the content of
2423      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
2424    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
2425    o clean up build options files for SunOS, in particular
2426      - remove -traditional from xmakedepend
2427      - change -xarch=v9 to -xarch=native for f77
2428      - restore use of make (not gmake)
2429      - add CC=gcc if using g77
2430    o changes per discussion of AM, JMC, & EH3 today:
2431      - move redundant "grid" variables out of "state" -- in preparation of
2432        creating proper CF-style coordinate variables and in recognition
2433        that any/all grid variables can be easily copied (eg. w/NCO) from
2434        the grid files into any of the other NetCDF files
2435      - *always* output grid variables with MDSIO (this will eventually be
2436        changed)
2437      - output MNC grid file if useMNC is true
2438    o every instance of _END_MASTER() has been found and replaced with
2439      _END_MASTER( myThid ) in order to satisfy certain picky Sun
2440      preprocessors
2441    o re-arrange diagnostics pkg initialisation:
2442     - allow each package to extend the available diagnostics list
2443     - add some checking and fix small problems (multi-threaded, ...)
2444     - new S/R diagnostics_fill (replace fill_diagnostics):
2445       look through the short list of active diag. (instead of the long list)
2446       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
2447    
2448    checkpoint57a_post
2449    o this set of changes restores TAMC compatibility
2450      tested for global_ocean.90x40x15 adjoint on trough
2451      (what a pain)
2452    
2453    checkpoint57a_pre
2454    o some modifs in tools/build_options for sunos
2455    o call ctrl_pack for ctrl at end for optimcycle=0
2456    
2457    checkpoint57
2458    o add horizontal bi-harmonic viscosity for vertical velocity
2459      - new parameter viscA4W (defaults to viscA4)
2460      - affects only non-hydrostatic code
2461      - to be done: no-slip lateral boundary conditions
2462    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
2463    o implement Implicit Vertical advection for pTracers
2464    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
2465      (implemented also for implicit vertical diffusion & advection)
2466    o OBCS: extend application of tracer open boundary conditions
2467      to a strip beyond the boundary of width Olx/Oly
2468    o add call monitor to TAF set of required calls (flow directives)
2469      and include in natl_box_adjoint
2470    o untangle a few ifdefs related to cost, ctrl, autodiff
2471      untangel a few ALLOW_ECCO_OPTIMIZATION
2472    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
2473      (theta2, salt2 in ecco_cost_weights)
2474    
2475    checkpoint56c_post
2476    o OBCS as control variables
2477      - update ctrl_ad_diff.list, obcs_ad_diff.list
2478      - remove balance of obcs controls from default
2479      - fix index bug nobcs in ctrl_init
2480      - fix dummy fields filen in ctrl_pack
2481      - add dummy weights for obcs
2482    o lsopt: comment out fort.94 output
2483    o optim:
2484      - remove unnecessary header files
2485      - adjusted namelists
2486      - add xerbla.F to Makefile
2487    o exf:
2488      - multiple modifications of exf_check_range
2489      - unit change in exf_init_runoff from [m/year] to [m/s]
2490    o mdsio:
2491      - i/o-vector change debugLevel from debLevA to debLevB
2492    
2493    checkpoint56b_post
2494    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
2495      is called from DO_THE_MODEL_IO
2496      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
2497      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
2498      - clean up PTRACERS_WRITE_TIMEAVE a little
2499    o add another verification experiment that tests both the cfc-pkg and
2500      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
2501      reactive tendencies treated inline with regular timestepping
2502    o testreport previously did a lousy job of comparing small numbers, so
2503      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
2504      implemented in the little c-progam tmp_cmpnum.c which is embedded in
2505      testreport.
2506    o ptracers_monitor: bug fix for MPI
2507    
2508    checkpoint56a_post
2509    o GCHEM: finish reorganizating the package
2510      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
2511        (introduces another 3D-array for each passive tracer, but only if
2512        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
2513        gchemTendency is not needed because the timestep is done separately)
2514      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
2515      - GCHEM is now---more or less cleanly---separate from PTRACERS
2516      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
2517        so clear to me how that should be done in a general way.
2518    o CFC: improve formatting of output in CFC_ATMOS
2519    o PTRACERS:
2520      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
2521        that ALL experiments with ptracers enable can be checked. This makes
2522        GCHEM_MONITOR obsolete.
2523      - include a runtime parameter PTRACERS_monitorFreq that defaults to
2524        monitorFreq
2525      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
2526    o add PTRACERS (PTR0[1-5]) to testreport output
2527    o exf_check_range:
2528      * default changed to .TRUE.
2529      * will check values for niter0 if debLevA, every timestep if debLevB
2530      * STOP in exf_check_range if 'out of range'
2531      * range chosen generous to allow for potential extema
2532      TBD: a version with stricter range
2533           permitted range would be runtime parameters
2534    o GMredi:
2535      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
2536      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
2537      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
2538    o GCHEM:
2539      - move call to GCHEM_FORCING_SEP, so that it is now called before
2540        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
2541      - introduced a useGCHEM runtime flag and applied it everywhere.
2542      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
2543        this flag is now only visible within GCHEM-pkg routines.
2544      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
2545        be replaced by a 3D array that is computed before thermodynamics; for
2546        this, the tracer ID iTracer had to be included into the parameter list
2547        of ptracers_forcing
2548      - set up forward_step to call gchem_forcing, that will replace
2549        gchem_forcing_int in ptracers_forcing
2550      - cleaning up
2551    o small cleaning of exch2: remove files that are also in eesupp/src
2552    
2553    checkpoint56
2554    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
2555    o mnc: cleanup "full" files--fixes out-of-memory problem
2556    o ECCO-GODAE
2557      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
2558      * fully merged and updated from SIO code
2559        windstress sign change affects
2560        - exf_inscal_[u/v]stress
2561        - sign of xx_tau[u/v] adjustments
2562        - signs in cost_scat
2563      * ctrl_get_gen: avoid update of tau[u/v] for first few days
2564      * natl_box_adjoint updated and compressed
2565      * 2-level checkpoint switch added
2566        (tested in EXP. 1 of natl_box_adjoint)
2567      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
2568    o SVD
2569      * first complete, non-hacked version for SVD calculations
2570      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
2571        performed via direct access files admtlm_vector.it????
2572        (via ctrl_[un]pack)
2573      * optimcycle is used for ARPACK iteration counter
2574        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
2575      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
2576        and add linear transforms where necessary
2577      * controls are initial/final SST, SSS (can be extended; need to check
2578        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
2579    o mdsio: filename info to both stderr, stdout
2580    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
2581      from sign change
2582    
2583    checkpoint55j_post
2584    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
2585      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
2586    o add consistent build directories and .cvsignore files to verification
2587    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
2588    o make all subroutines 30 or less characters in length for certain older
2589      compilers to work (a thorough search only turns up two routines in
2590      pkg/ptracers)
2591    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
2592      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
2593    
2594    checkpoint55i_post
2595    o change arrays for total vertical diffusivity (2.D if explicit,
2596      3.D if implicit) ; each ptracer uses its own background value.
2597    o added mnc/NetCDF output capability to ocn_compon_interf
2598      - added bits to verification/cpl_aim+ocn so that it can run on
2599        ITRDA and other clusters without the mpirun "-wd" option
2600    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
2601      configuration
2602    o give MNC the ability to create additional files rather than
2603      exceeding a specified file size limit "MNC_MAX_FILESIZE"
2604      - the default is just less than 2GB which is a practical limit
2605        on many systems
2606    o Compute the non-local term using either KPP vertical diffusivity (=default)
2607       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
2608    
2609    checkpoint55h_post
2610    o add verification test "vermix"
2611    o remove all the *_ioinc flags and replace with the single global
2612      outputTypesInclusive flag
2613    o allow to set a vertical profile of vertical diffusivity for T & S
2614    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
2615    o useMNC moved from data.mnc to data.pkg
2616    
2617    checkpoint55g_post
2618    o Renaming carbon AD experiments to comply with testreport conventions
2619    o Updating adjoint of Held-Suarez hs94.1x64x5
2620    o Fixing directives for non-ECCO forward_step, after ECCO directives
2621      have been fixed to avoid recomp. of do_oceanic_phys
2622      Works well for global_ocean.90x40x15,
2623      but recomp. issue remains for carbon
2624    o Updating adjoint output for natl_box_adjoint after
2625      pkg/ecco has been modified (see taga c55d_post)
2626    
2627    checkpoint55f_post
2628    o rename to timeave_init_fixed
2629    
2630    checkpoint55e_post
2631    o some delicate re-shuffle of store directives to avoid one
2632      extra call of do_oceanic_physics
2633      affects ecco_the_main_loop.F, do_oceanic_physics.F
2634      checkpoint_lev1_directives.h
2635    o NB: this may break global_ocean adjoint temporarily,
2636      but it is clear how to fix it. Will do later, need this now.
2637    
2638    checkpoint55d_post
2639    o ECCO specific cost function terms (up-to-date with 1x1 runs)
2640    o ecco_cost_weights is modified to 1x1 runs
2641    o modifs to allow observations to be read in as
2642      single file or yearly files
2643    o enable to read exf forcing fields as either
2644      single file or yearly files (flag useExfYearlyFields)
2645    checkpoint55d_pre
2646    
2647    o switch between 2-level and 3-level checkpointing
2648    o add ability of MNC to write local and "partial" (eg. 2D slices where
2649      the full 3D field is never actually stored) arrays to NetCDF files
2650      with the correct (that is, the complete multi-dimensional) set of
2651      array indicies
2652      - used in mom_vecinv() to write the diagFreq output
2653      - tested (demonstrated) in verification/aim.5l_cs
2654    o further mnc-ification
2655      - add verification/lab_sea to the list with mnc setups
2656      - fix undefined mnc v-names in cd_code
2657      - add kpp to mnc output (both snapshot and timeave)
2658    o non-hydrostatic code
2659      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
2660        in calc_gw.F
2661      - defaults to viscAh
2662      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
2663        friction or Leith) in non-hydrostatic mode, as long as there is
2664        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
2665    o pkg/cost
2666      extend simple cost functions to treat time mean quantities
2667      (T,U,V) via cost_accumulate_state from cost_tile
2668    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
2669        be 2 times larger than the minimum size the advection scheme requires.
2670        now get a perfect conservation of salt in advect_cs test-exp (updated)
2671    o GGL90 (Gaspar's TKE mixed layer)
2672      - add horizontal diffusion of TKE, requires exchanges in
2673        do_fields_blocking_exchanges, horizontal diffusivity is zero by
2674        default. In OPA there is no horizontal diffusion of TKE but the
2675        mixing coefficients are computed from a horizontal average of TKE of
2676        6 points or so. I think that diffusion has a little more physical
2677        justification.
2678      - clean up ggl90_calc in the hope of reducing memory usage (this hope
2679        was in vain)
2680      - mask tke-variable in ggl90_init
2681    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
2682    o fix biharmonic diffusion on CS-grid.
2683    o more obcs stuff
2684      - added obcs_external_fields_load as an alternative to the EXF-pkg option
2685        for reading boundary values. This routine is called from
2686        obcs_prescribe_read
2687      - updated obcs_check
2688      - changed sponge layer relaxation parameter units for days to seconds
2689      - turned off sponge layer by default
2690      - changed argument list of OBCS_CALC to myTime+deltaTclock
2691      - fixed about 35 bugs in obcs_external_fields_load
2692    
2693    checkpoint55c_post
2694    o obcs stuff
2695      - new runtime flags useOBCSprescribe, useOBCSbalance
2696      - re-arranged obcs_calc
2697      - moved exf_getobcs to obcs_prescibe_read
2698        obcs_prescibe_read is called after ORLANSKI stuff
2699        and independent of it (executable can contain all).
2700      - updated obcs_check
2701      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
2702        These may be necessary only if tangential velocities are
2703        prescribed at OB, not sure, needs testing.
2704    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
2705      which simplifies the calls and passes the ifc check-bounds test
2706    
2707    checkpoint55b_post
2708    o add a 2D scalar, Z location, exchange_2 routine.
2709    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
2710      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
2711      affects advect_cs results (for the wrong reason): update output.txt
2712    o use a more standard discretization for biharmonic viscosity ;
2713     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
2714      affects results of dome set-up: update output.txt
2715    o fix gad_advection.F (CubedSphere part), back to version 1.23
2716    o fix bug in mom_vi_del2uv.F (CubedSphere part).
2717    
2718    checkpoint55a_post
2719    o merged code to
2720      * prescribe/read time-dependent open boundaries
2721        (works in conjunction with exf, cal)
2722      * sponge layer code for open boundaries
2723      * each boundary N/S/E/W now has its own CPP option
2724        (healthy for the adjoint)
2725    
2726    checkpoint55
2727    o up-to-date adjoint of previous breaks
2728      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
2729      - global_ocean_ebm: adjoint still needs fix (TLM ok)
2730      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
2731      - carbon: * remove tr1-related adjoint verification
2732                * add ptracer as control variable
2733    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
2734      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
2735    
2736    checkpoint54f_post
2737    o in verification/carbin/ remove experiment related to
2738      ALLOW_PASSIVE_TRACER (array tr1 etc)
2739      code_ad/ input_ad/ results_ad
2740    
2741    o add two new packages
2742      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
2743        + subject to optimization (memory)
2744      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
2745        + subject to reordering (many GOTOs in the original code)
2746        + so far opps is called for every (i,j) point, and then operates in
2747          the vertical; one may want to reorder the scheme in order operate in
2748          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
2749          fields)
2750    o overhaul of IO so that we now have flags for MDSIO and/or MNC
2751      - all verification tests compile and run with linux_ia32_g77
2752      - defaults are compatible with current input files--nothing
2753        should change if you were not previously using MNC
2754      - MNC output has been added in numerous places (eg. timeave)
2755        but there are still a few writes not yet do-able with MNC
2756        (this is in progress)
2757      - flags now allow for either/or/both use of MDSIO and MNC and
2758        documentation will soon follow
2759      - numerous small formatting cleanups for ProTeX
2760    o add version info (via BUILD_INFO.h) to MNC and stdout
2761    
2762    checkpoint54e_post
2763    o add two new packages
2764      - pp81 (Packanowski and Philander, 1981), Richardson number and
2765        stratification dependent mixing
2766      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
2767      - these scheme operate in a similar manner as KPP (without ghat, of
2768        course), however there is only one diffusivity that is used for both
2769        temperature and salinity (and passive tracers)
2770    o add offline package
2771    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
2772      provided by Stephanie Dutkiewicz
2773    o genmake2: add ability to search for C compilers and cleanup test output
2774      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
2775    
2776    checkpoint54d_post
2777    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
2778    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
2779      leading to additional shift by 5 days each year of integration
2780       (i.e. leading to considerable offset over the years)
2781    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
2782    o start with no AB and no initial filtering (staggerTimeStep):
2783      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
2784    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
2785      (external loading & cpl import/export stay in forward_step.F)
2786    o update coupling interface to work with new staggerTimeStep
2787    o change MDSIO ptracers_pickup.
2788    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
2789    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
2790    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
2791    
2792    checkpoint54c_post
2793    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
2794      this affects (truncation error) output.txt of test-exp:
2795       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
2796    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
2797    o change Qnet to always be the net heat flux, (+upward).
2798      affects (truncation error) output of natl_box exp.: updated
2799    o define the max number of passive tracers in PTRACERS_SIZE.h
2800    o start to test mnc routinely in exp0
2801    o add sea-ice loading (sIceLoad) as a new forcing field.
2802    
2803    checkpoint54b_post
2804    o add testreport "-j JOBS" option for parallel builds (tested and pretty
2805       impressive on Altix and Opteron systems)
2806    o diagnostics can now write NetCDF files through the mnc package
2807    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
2808    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
2809    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
2810      affects (truncation error) output of lab_sea & natl_box exp.: updated
2811    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
2812    
2813    checkpoint54a_post
2814    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
2815    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
2816    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
2817    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
2818      + internal_wave (shift in writing cg2d_ini_res)
2819    checkpoint54a_pre
2820    
2821    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
2822      - modified verification/lab_sea and natl_box_adjoint accordingly
2823    
2824    checkpoint54
2825    checkpoint53g_post
2826    o prepare splitting of thermodynamics: store convect.counter in common block
2827    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
2828      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
2829    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
2830    o new parameter "nShapS": allow to treat differently S from T (nShapT)
2831    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
2832    o restore adjointability
2833    
2834    checkpoint53f_post
2835    o modifications that affect AIM experiment results (update output.txt):
2836      - no advection of S at top interface Nr (pkg/generic_advdiff)
2837      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
2838    o AIM pkg:
2839      - include stability function into surf.Flux derivative relative to Tsurf
2840      - calculate clear-sky radiation & surface temp. change (for diagnostics)
2841    
2842    checkpoint53e_post
2843    o merged cylindrical coord configuration
2844    o added rotating_tank experiment
2845    checkpoint53e_pre
2846    
2847    checkpoint53d_post
2848    o faulks upgraded: re-generate output.txt that have changed:
2849       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
2850    o Added Bryan and Lewis, 1979, vertical diffusivity profile
2851    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
2852    o added Sadourny discretization of Coriolis
2853      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
2854      - re-enabled use of omega3 (useAbsVorticity)
2855    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
2856      vector-invariant equations
2857      - note: does *NOT* yet use same variable visc. for no-slip BC's.
2858    o recoded the lateral boundary conditions for non-hydrostatic w, this time
2859      hopefully without new bugs
2860      - still to do: biharmonic friction for non-hydrostatic w
2861    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
2862    o regenerated output for global_ocean_ebm (using -ieee)
2863    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
2864      of mom_common/
2865      - simple re-arrangement of instructions within computing loop
2866    checkpoint53d_pre
2867    
2868    checkpoint53c_post
2869    o new version of coupler for AIM+thSIce and Ocean models
2870     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
2871     - land: change Evaporation of snow
2872     - aim with thSIce: fix bug in snow-precip.
2873    o changes to calc_gw.F
2874     - bug fix for w^2 term near the bottom boundary
2875     - (hopefully) improve the lateral slip boundary condtions for use with
2876        partial/looped cells
2877      - because the bug fix changes two verification experiments anyway (exp5
2878        and plume on slope), change the lateral boundary condition from half slip
2879        to the value of no_slip_sides
2880    o ebm package wasnt quite up to the parallel task. Fixed that.
2881    o Adjoint of EBM package + verification
2882      * TLM OK
2883      * ADM not sufficient accuracy yet (needs further testing)
2884    
2885    checkpoint53b_post
2886    o Commiting new energy balance model to repository
2887      * package is pkg/ebm
2888      * verif. is verification/global_ocean_ebm
2889      * references are in ebm_driver.F
2890    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2891    C        Global thermohaline circulation. Part I:
2892    C        Sensitivity to atmospheric moisture transport.
2893    C        J. Climate 12(1), 71-82
2894    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2895    C        Global thermohaline circulation. Part II:
2896    C        Sensitivity with interactive transport.
2897    C        J. Climate 12(1), 83-91
2898    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
2899    C        Destabilization of the thermohaline circulation
2900    C        by atmospheric eddy transports.
2901    C        J. Climate 7(12), 1870-1882
2902    o Will need long integration testing.
2903    checkpoint53b_pre
2904    
2905    o created pkg/mom_common in preparation for variable viscosity code
2906    o renamed and split ini_mnc_io
2907    o pkg/land: only liquid water can diffuse or run-off
2908    o AIM using land: soil wetness availability account for snow
2909    o added printMapIncludesZeros to EEPARMS namelist
2910    
2911    checkpoint53a_post
2912    o restore TAMC compatiility for exf_constants.h
2913      (no usage of _d in .h)
2914    o Additional storing in KPP in an attempt to fix
2915      TAMC problem with adjoint of KPP code.
2916      (no success...)
2917      Identical code works fine with TAF.
2918    o Fixed verification/natl_box_adjoint experiments.
2919      Initial conditions for Experiments 4 and 5 are now
2920      set to "SEAICE_initialHEFF=0", which is more reasonable,
2921      and hence gives results closer to that of Experiment 2.
2922      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
2923    
2924    checkpoint53
2925    o stable checkpoint with up to date adjoint
2926      TLM tests only run for 1st grdchk at the moment. Its unclear if
2927      this is a code problem or a problem with resetting code for g_
2928      variables that is being autogenerated wrong.
2929      Otherwise:
2930       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
2931       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
2932         are both still in chaos following their security messes.
2933    
2934    checkpoint52n_post
2935    o various build (mostly genmake2) changes including:
2936      - ability to build/run more easily within Cygwin and MacOS X
2937      - more complicated Makefiles with a stronger dependence on Gnu Make
2938    o pkg/seaice modifications
2939      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
2940        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
2941        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
2942      - changed proxy for geostrophic velocity and updated
2943        verification/lab_sea/results/* accordingly
2944      - removed ADI dynamic solver from pkg/seaice
2945      - replaced all occurrences of 1/CSTICE or 1/CSUICE
2946        they caused a segmentation fault under certain circumstances
2947      - removed unused field WATR
2948    o bug fix in exf-package:
2949      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
2950         now reflect that.
2951    o small fixes in the cal-package:
2952      - set reference date to first of January for the 'model'-calendar
2953      - failing of cal_CheckDate in cal_FullDate now actually results in a
2954        warning
2955    o small modifications in exf-package to increase flexibility:
2956      - change climtempfreeze from a constant to a runtime parameter that
2957        is specified in data.exf_clim (default = -1.9)
2958      - introduce runtime parameter windstressmax (default = 2.0) that is
2959        specified in data.exf
2960    o fix in pkg/thsice:
2961      - update Evap (Tsf changes) to be consistent with Latent heat flux
2962      - maintain snow precipitation unchanged (even if Tsf >=0).
2963     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
2964    
2965    checkpoint52m_post
2966    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
2967      this does not change any of the results, because myIter=0 in swfrac always
2968      lead to jwtype=2 (the default anyway), but the call makes little sense
2969      as a default
2970    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
2971    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
2972      atmospheric model (AIM) to use it ; add a "slab ocean" component.
2973    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
2974    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
2975    o extending useSingleCpuIO option to work with new exch2 I/O format
2976      - old-style, missing-tile I/O is still accessible by defining CPP
2977        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
2978    o monitor package can write to NetCDF files and/or STDOUT
2979    o fix re-definition bug in MNC_GRID_INIT_ALL()
2980    o doc/api_reference added
2981      - a framework for building an API Reference Manual using all
2982        the "protex" comments embedded in the code
2983      - see pkg/generic_advdiff, pkg/mnc for examples
2984    o MNC:
2985      - make myThid the last argument for all subroutines
2986      - new default for the grid files: NO halos
2987      - add useMNC and other run-time flags
2988      - separate per-file-group handling of the unlimited dimension
2989      - early initialization of MNC w/ flags read at the eeboot stage
2990        and lookup tables set in initialize_fixed
2991      - write all MNC output to a freshly-created directory
2992    o thermodynamics sea-ice (thsice) is now tested with testreport.
2993    o test exp. advect_cs: use the standard cs32 grid ; update output.
2994    o Added functionality to grdchk:
2995      pick global i,j,k position (or nearest wet) where to perform check.
2996    
2997    checkpoint52l_post
2998    o new land formulation:
2999      a) use ground enthalpy as prognostic variable to ensure exact
3000         energy conservation.
3001      b) account for water temperature and for latent heat of freezing
3002         in all processes (rain, run-off, ground storage)
3003      c) compute surface and ground temperature implicitly.
3004    o aim_v23 modification for new land model:
3005      a) Treat separately land / ocean / sea-ice surface fluxes
3006         to allow implicit computation of land & sea-ice surface temp.
3007      b) add snow precipitation.
3008    checkpoint52l_pre
3009    
3010    o fix problem (when 1 tile is empty) in min/max monitor.
3011    o fix bug in timeAve (u,vZetatave in common block)
3012    o no restoring terms under ice for pkg/seaice
3013    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
3014    o bug fix for pkg/seaice pickups
3015    o change MNC call locations and add coordinate attributes
3016    o mask vorticity at the corner ; affects global_ocean.cs output
3017    o fix ini_curvilinear_grid ; test CS experiments with mpi
3018    o aim.5l_cs: modify sea-ice fraction input file ; update output
3019    o exf: Adding simple range check routine for exf fields after read
3020    
3021    checkpoint52k_post
3022    o removed top-level directory "diags"
3023      - we migrated these functions to pkg/timeave a long time ago
3024    o fixed bug introduced in pkg/monitor
3025    o accuracy ctrlprec = 32 insuffient for gradient checks using
3026      averaged fields (I/O via cost_averages)
3027      -> use ctrl.h in active_file*.F to control I/O precision.
3028    o paramter list of CALL ADTHE_MAIN_LOOP
3029    o added initial do_the_model_io to ecco
3030    o set all ...Freq to zero after cost_final
3031      taveFreq, dumpFreq, pChkptFreq
3032    o MAIN and ECCO differentiability restored
3033    
3034    checkpoint52j_post
3035    o fix nchklev in tamc.h for global_ocean...
3036    o Bringing flow and store directives up-to-date
3037    o Really weird thing!
3038      call do_the_model_io from the_main_loop with parameters
3039      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
3040      TAF places a faulty re-call of initialise_varia
3041      after cost_final call which should not be there!
3042    checkpoint52j_pre
3043    
3044    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
3045      error messages
3046    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
3047    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
3048      debug output
3049    o modfied mdsio_writefield.F to handle non-global files under exch2
3050    o update AIM Cubed-Sphere exp (aim.5l_cs):
3051      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
3052    o update AIM Equatorial Channel exp:
3053      use standard aim_v23 pkg and change the SST fields to be more realistic.
3054    o globalFile now works with exch2
3055    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
3056      mon_vort3.F to make exch2 friendly with >1 tile per cube face
3057    o limit timeave output for hi-res integrations
3058    
3059    checkpoint52i_post
3060    o removed CPP_EEOPTIONS.h from verification/*/code
3061    o updated the tiling for global_ocean_pressure
3062    checkpoint52i_pre
3063    
3064    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
3065      the old pkg/aim).
3066    
3067    checkpoint52h_pre
3068    o shortened offending lines in exch2_send_rx?.template
3069    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
3070    o genmake2: add build & execute test for NetCDF code
3071    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
3072      old grid files, moved CPP_EEMACROS.h to pkg/exch2
3073    o added useSingleCPUIO flag to monitor.F and mon_out.F
3074    o added temporary hack for sea-ice dynamics on the cube:
3075      metric terms are ignored and it is assumed that
3076      there is no sea-ice on cube faces 1, 2, 4, and 5.
3077    
3078    checkpoint52f_post
3079    o added exch2 cube routines to pkg/exch2
3080    o modified hs94.cs-32x32x5 to use it
3081    o added new grid files to hs94.cs-32x32x5
3082    checkpoint52f_pre
3083    
3084    checkpoint52e_post
3085    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
3086      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
3087    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
3088      to work with implicit vertical advection and AB ;
3089    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
3090    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
3091     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
3092    checkpoint52e_pre
3093    
3094    o fix bug in impldiff when Nr=1 or Nr=2.
3095    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
3096    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
3097    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
3098      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
3099    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
3100    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
3101    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
3102    
3103    checkpoint52d_post
3104    o re-tiled many expts to allow comparison in multi-processor mode
3105      - updated output accordingly
3106      - changed hs94.128x64x5 to use intial T from file rather than use the
3107        random number generator
3108    o add infrastructure in model routines for fizhi and gridalt packages
3109    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
3110    o changes to permit hi-res, cubed-sphere, configuration
3111      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
3112      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
3113      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
3114        of surface winds for the cube
3115      (A verification experiment, based on global_ocean.cs32x15, but with
3116       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
3117       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
3118       complete with example surface forcing files and matlab scripts to look
3119       at the output and compare it with that of global_ocean.cs32x15.)
3120    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
3121       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
3122       to conform to the common rule.
3123    o check-in the first version of the coupler + interfaces for multi-components
3124       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
3125       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
3126       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
3127       - ocean and atmos. share the same horizontal grid (no interpolation).
3128       - exchanges between component and coupler is done in forward_step
3129    o new verification experiment, cpl_aim+ocn:
3130       coupled ocean - AIM atmosphere on cs32 grid.
3131    
3132    checkpoint52d_pre
3133    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
3134    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
3135    
3136    checkpoint52c_post
3137    o Fixing OPTIONS files for use of exf:
3138      - ALLOW_ECCO not needed
3139      - ECCO_CPPOPTIONS.h should not be included from
3140        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
3141        as has been the case in the past
3142      - All cal/exf related options are currently set in
3143        single header file. Should remain so until we
3144        agree on a consistent new policy.
3145    o Removed all CPP options for cal package.
3146      cal has no more CPP options.
3147    o modified STOREs in GAD_ADVECTION
3148    o corrected key comp. for passkey
3149    
3150    checkpoint52b_post
3151    o new version: "thsice" of thermodynamic sea-ice pkg:
3152     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
3153     - modify fluxes but do not change theta directly;
3154     - light cleaning of bulk_force pkg (still needed with thsice).
3155     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
3156       + output_thsice.txt to test thsice & bulk_force pkgs.
3157    o put back grid & coriolis monitor output.
3158    checkpoint52b_pre
3159    
3160    o call "do_the_model_io" at the beginning (=> dump initial state)
3161    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
3162    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
3163      (need info on NUMBER_OF_PTRACERS)
3164    o missing PTRACERS headers in some routines
3165    o default tamc.h in pkg/autodiff supposed to crash
3166      to ensure proper customization
3167    
3168    checkpoint52a_post
3169    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
3170      - moved surfaceTendencyTice from pkg/seaice to main code
3171      - subroutine FREEZE_SURFACE now limits only surface temperature
3172        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
3173        => new output.txt for global_ocean.cs32x15 & global_with_exf
3174      - keep the old version of FREEZE for backward compatibility;
3175        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
3176      - corresponding modifs for TAF directives
3177    o added surface flux output variables to TIMEAVE_STATVARS
3178    o time-averaged output for pkg/ptracers
3179    o fix problem with ECCO-related divided adjoint
3180      snapshot file was missing some ad-variables,
3181      but no warning issued by TAF
3182    
3183    checkpoint52a_pre
3184    o some bug fixes for #undef REAL4_IS_SLOW
3185    
3186    checkpoint52 = ecco_c52_e35
3187    o after testing adjoints of checkpoint51u_post
3188    
3189    checkpoint51u_post
3190    o this is the post-merge tag of the ecco-branch
3191      (needs another clean checkout and re-testing)
3192    o various natl_box_adjoint configs and results
3193      but no input fields
3194    o obcs adjoint not yet merged!
3195    o adding ECCO global 1x1 and 2x2 degree configs
3196    o updated/extended some store directives for seaice
3197    o pkg/ecco now containes ecco-specific part of cost function
3198    o top level routines the_main_loop, forward_step
3199      supersede those in model/src/
3200      previous input data.cost now in data.ecco
3201      (new namelist ecco_cost_nml)
3202    o in ctrl/ cleaned some cross-dependencies and updated CPP options
3203    
3204    checkpoint51t_post
3205    o this is the pre-merge tag of the ecco-branch
3206    
3207    checkpoint51s_post
3208    o cleanup: removed various obsolete #define-s
3209    o pkg/grdchk
3210      - renamed 'ph-grd 3' to 'grad-res'
3211      - merged from ecco-branch
3212        (remaining bug fixes for obcs gradient checks)
3213      - additional high-precision output for testreport
3214        (grep for 'precision_grdchk_result')
3215    
3216    checkpoint51r_post
3217    o cleaned up or removed CPP_OPTIONS.h files
3218    o updated results for some of the tests to reflect the new
3219      optfiles (-ieee: -O0 instead of -O3)
3220    
3221    checkpoint51q_post
3222    o cd_code:
3223      - moved cd_scheme.F -> cd_code_scheme.F
3224      - separate read_checkpoint from cd_code_ini_vars.F
3225      - separated cd_code part from write_checkpoint
3226      - updated AD_SOURCE, generated .flow
3227      - added CD_CODE_VARS.h to the_main_loop
3228      - Moving cd_code specific store dir.s to pkg/cd_code
3229    o ctrl package totally restructured
3230      - pack/unpack now optional and decoupled from
3231        xx_/adxx_ I/O
3232      - ctrl_pack/unpack cleaned
3233        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
3234      - confined inclusion of AD_CONFIG.h to where necessary.
3235    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
3236    
3237    checkpoint51p_post
3238    o create initial cd_code package
3239      - WARNING: the initialization of fields within packages
3240        is broken because INI_FIELDS (where READ_CHECKPOINT is
3241        called) is called *before* PACKAGES_INIT_VARIABLES.
3242        This seems to be backwards since
3243        1) its important to initially zero the entire field including
3244           the "halo" region
3245        2) zeroing needs to be done *before* reading pickup info
3246           and the pickup call might or might not happen in any
3247           particular run
3248      - this needs an overhaul for R2
3249    o cleanup verification/*/code/GMREDI_OPTIONS.h
3250    o cleanup testreport
3251    
3252    checkpoint51o_post
3253    o bringing AD-related verif's up to date with genmake2
3254      - carbon/
3255      - global_ocean.90x40x15/
3256      - hs.94.1x64x5/
3257      - (front_relax/ )
3258    o (more) consistent directory structure for AD-related verif.'s
3259    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
3260    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
3261    o bug fix in find_alpha.F for MDJWF:
3262      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
3263        change rho -> rho-rhoConst
3264      - replace call find_rho to find_rhonum
3265    o initialisation of rFlx extended to full array (required by TAF)
3266      and shifted to thermodynamics
3267    o removed PTRACERS.h in ptracers routine
3268    o added surfacetendencyPtr to S/R parameter list pracers_forcing
3269    o Correcting initialisations for fVerU, fVerV.
3270    o helping TAF to recognize dependency on kUp for
3271      fVerU, fVerV
3272    o Replacing delZ by delR in pkg/ctrl/
3273    checkpoint51o_pre
3274    
3275    o undid all of cp51 pending some cleanups and discussion
3276    o added the [#include "AD_CONFIG.h"] statement to all files that need
3277       it for adjoint/tl #defines
3278     o re-worked the build logic in genmake2 to support AD_CONFIG.h
3279     o removed tools/genmake since it no longer works
3280    
3281    checkpoint51n_post
3282    o modifications to make FREEZE flux visible to pkg/kpp
3283      - moved surfaceTendencyTice from pkg/seaice to main code
3284      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
3285      - subroutine FREEZE now limits only surface temperature
3286        (this means new output.txt for global_ocean.90x40x15,
3287         global_ocean.cs32x15, and global_with_exf)
3288    o added surface flux output variables to TIMEAVE_STATVARS
3289    
3290    checkpoint51n_pre
3291    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
3292    o added [#include "AD_CONFIG.h"] to all files that use the following
3293      defines:
3294      - ALLOW_ADJOINT_RUN
3295      - ALLOW_TANGENTLINEAR_RUN
3296      - ALLOW_ECCO_OPTIMIZATION
3297    
3298    checkpoint51m_post
3299    o incorporating changes to get TAMC/TAF working in genmake2
3300      - added new TAMC/TAF targets to the Makefile
3301      - various cleanups related to package handling
3302      - these changes should have no impact on the forward model
3303    
3304    checkpoint51l_post
3305    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
3306     - faster algorithm for cal_addtime.F
3307     - higher precision arithmetic, where needed
3308     - pkg/exf *startdate variables changed from calendar date to
3309       model integration time
3310    
3311    checkpoint51l_pre
3312    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
3313    o enable to apply restoring on S & T only in a latitude band.
3314    o update output (external_forcing_surf modif. change truncation errors)
3315       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
3316    
3317    checkpoint51k_post
3318    o change default to: useNHMTerms=.FALSE.
3319     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
3320       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
3321     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
3322        exp1, ideal_2D_oce
3323     - change data file of oceanic exp (leave the results unchanged for now)
3324       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
3325    o set gravitySign automatically according to the vertical coordinate used
3326      (and change sign: back to "logical" value: +1 when R increases downward)
3327    o added an include barrier to the default CPP_OPTIONS.h and
3328      removed the #include "PACKAGES_CONFIG.h" from it
3329    o fix a bug in mom_fluxform (from chk51j_post)
3330    
3331    checkpoint51j_post
3332    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
3333    o adjusted some flow directives (dynamics, thermodynamics)
3334    o added cubed-sphere case to test cost function
3335    o heckpoint_lev?_directives.h now include
3336      pkg-specific directives, whenever those are enabled.
3337    o Moving pkg-specific flow directives to corresponding pkg
3338      Moving pkg-specific differentiation list to corresponding pkg
3339      Moving pkg-specific checkpoint-lev storing to corresponding pkg
3340      ---> conventions are
3341           - pkg_ad.flow
3342           - pkg_ad_diff.list
3343           - pkg_ad_check_lev?_dir.h
3344    
3345    checkpoint51i_post
3346    o merge of the branch-genmake2
3347      - knowingly breaks the older genmake
3348      - automatic generation of all ALLOW_${PKG_NAME} defines
3349      - new testreport supersedes older testscript
3350    o large number of package inclusion and header cleanups
3351    checkpoint51i_pre
3352    
3353    o new output for adjoin of global ocean vector invariant
3354    o fix for checkpoint of thermodynamic seaice and bulk_force
3355    o Steph gchem various cleanups
3356    
3357    checkpoint 51h_pre
3358    o fixed some single quotes
3359    o modify gchem pkg to be more versatile
3360    o modifications to clean up dic pkg
3361    o add pkg/cfc
3362    
3363    checkpoint51g_post
3364    o provide links for ARPACK and ADM*TLM
3365    o start removing verification/vero/
3366    o update AD-related stuff
3367      (in particular some IF-statements in model/src/ routines)
3368    o adding to verification/global_ocean.90x40x15/ adjoint of
3369      vector invariant setup
3370    
3371    checkpoint51f_post
3372    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
3373    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
3374      of tracer Green's fucntions for ocean inversion project.
3375    
3376    checkpoint51f_pre
3377    o Added on-the-fly spatial interpolation capability
3378        "USE_EXF_INTERPOLATION" to pkg/exf.
3379      - This is a temporary Cartesian-grid hack until
3380        the super-duper ESMF coupler becomes available.
3381      - See verification/global_with_exf/README for usage example.
3382      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
3383        flags and modified pkg/seaice accordingly.
3384    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
3385        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
3386        non-local transport term.
3387    
3388    checkpoint51e_post
3389    o pkg/mom_vecinv:
3390      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
3391      - add time-ave diagnostic of vorticity advection.
3392    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
3393    o atmospheric geopotential: - include water vapor effect;
3394                                - use p^kappa in p* scaling.
3395    o land pkg: read initial state from files.
3396    o AIM : add stratospheric drag in the upper level
3397    
3398    checkpoint51d_post
3399    o change function ILNBLNK (=> last non-blank char.) to return zero
3400      (instead of the string length) when the string. char is empty
3401    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
3402    o modif's to restore TAMC compatibility
3403      - avoid "_d" constructs in PARAMETER declarations
3404      - avoid interrupting lines by comment lines
3405    o Use cluster local disks for purely local I/O
3406      vs. globally visible disks needed for ctrl stuff
3407      (merged from ecco-branch)
3408      - new active_file_loc... and mdsio_..._loc routines
3409      - affected packages: autodiff, ctrl, grdchk, mdsio
3410    
3411    checkpoint51c_post
3412    o introducing integer flag debugLevel
3413      - debLevZero: suppress all output
3414      - debLevA: standard
3415      - debLevB: equivalent to current debugMode=.TRUE.
3416    o introducing pathname variable mdsioLocalDir for mdsio
3417      that can be specified at runtime
3418      (relevant for cluster I/O to local disk)
3419    `
3420    >>>checkpoint51b_post
3421    adjoint of ptracers
3422    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
3423    o extended state in checkpoint_lev?, etc.
3424    o alternative ctrl/cost with tr1 or ptracer
3425    o new comlev1_bibj_ptracers
3426    o new ptracers.flow
3427    o made ptracers_forcing same as external_forcing_s
3428    o added verification for adjoint with ptracers
3429      - adm. grdchk fail so far
3430      - tlm. grdchk OK
3431      - checked tapelev/comlev recomputations: OK
3432    <<<checkpoint51b_pre
3433    
3434    checkpoint51a_post
3435    o added code for biogeochemistry package
3436      - new pkgs: dic, gchem
3437      - new subroutine in ptracers
3438    o modify code for biogeo packages
3439      - in model/src and pkg/ptracers
3440    
3441    checkpoint51
3442    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
3443      - autodiff, ctrl, exf, grdchk, seaice
3444      kept separate packages
3445      - cost, ecco, obcs
3446    o updating verification/internal_wave, verification/lab_sea
3447      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
3448    
3449    checkpoint50i_post
3450    o Preparing next differentiable checkpoint and sync
3451      of MAIN vs. ecco-branch
3452      - 1st step: this one is differentiable
3453      - 2nd step: next(! not this) checkpoint will have updated packages
3454                  from ecco-branch)
3455    
3456    checkpoint50h_post
3457    o new package "land": provide surface BC for AIM.
3458    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
3459    o AIM: use true log-P extrapolation for near surface temp (= as in
3460        F.Molteni paper) ; update aim.5l_cs output.
3461    o New variable in PARM03 for more flexible pickups
3462    o somewhat cleaned package initialisation sequence for
3463      ctrl/ cost/ ecco/ in packages_... routines
3464    
3465    checkpoint50g_post
3466    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
3467      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
3468      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
3469        made the default because of faster convergence than ADI
3470    
3471    checkpoint50f_post
3472    o exf totally restructured
3473      - replaced all exf_set_ routines by one generic exf_set_gen.F
3474        and made sure it's still differentiable
3475      - split exf_getffields.F into new exf_bulkformulae.F
3476      - exf_inscal_/exf_outscal_ suffixes consistent with field names
3477      - updated adjoint/makefile and relevant verif. accordingly
3478    
3479    checkpoint50f_pre
3480     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
3481          + change Evap over land. (update aim.5l_cs output)
3482     o added missing .cvsignores and made uniform across expts
3483     o changed configuration of tidal_basin_2d expt
3484     o added pkg/debug functions for tracing code in fatal crashes
3485     o tidied pkg/monitor to use MONITOR_OPTIONS.h
3486     o new fn in pkg/monitor to stop model if solution grows too big
3487     o removed lots of single quotes from comments
3488    
3489    checkpoint50e_post
3490    o make KPP work with PTRACERS
3491     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
3492       nearly a copy of kpp_transport_s
3493     - there is no analogue to SurfaceTendencyS, so I have to use
3494       gPtr(of the surface layer) instead
3495    o add a new platform SunFire+mpi (SunFire 15000) to genmake
3496    checkpoint50e_pre
3497    
3498    checkpoint50d_post
3499    o change kpp output from multiple-record state files to single-record state
3500      files analogous to write_state.F
3501    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
3502      analogous to the cg2d-related output.
3503    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
3504      so that writing to internal file fn (with length 512) fails.
3505    checkpoint50d_pre
3506    
3507    checkpoint50c_post
3508    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
3509    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
3510    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
3511    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
3512    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
3513    
3514    checkpoint50c_pre
3515    Merging from release1_p13:
3516    o bug fix for pkg/seaice dynamic solver
3517    o Added SEAICE_initialHEFF to pkg/seaice
3518    
3519    checkpoint50b_post
3520    o store u*,v* in gU,V instead of in guNm1,gvNm1
3521    o in order to put the momForcing out of the Adams-Bashforth:
3522      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
3523      to timestep.F
3524    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
3525    o re-generate output for highly sensitive test-exp:
3526       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
3527    
3528    checkpoint50b_pre
3529    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
3530    o corrected CPP option mismatch in exf_Bulk... functions for case
3531      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
3532    
3533    checkpoint50a_post
3534    o Bug fix for merging between c50 and KPP.
3535      ikey was passed from thermodynamics to kpp_calc via
3536      common block rather than being recomputed in kpp_calc,
3537      in contradiction with new key itdkey.
3538      New key ikppkey created, and tamc.h headers updated.
3539    
3540    checkpoint50
3541    - 2nd step of merge with ecco-branch:
3542      merge changes in ecco-branch back into main trunk
3543    - bug fix in find_alpha
3544    - more storing in gmredi_calc_tensor.F, kpp_routines.F
3545    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
3546    - merged some sliced AD support routines
3547    
3548    checkpoint49
3549    merged from ecco-branch:
3550    o exf:
3551      - Enable initialisation of forcing fields to constant
3552        (runtime) values.
3553      - in exf_getffields.F
3554        Reduce i-/j-loop to interior domain, discarding overlaps.
3555        That also fixes wrong TAF-key computations for key_1, key_2
3556        with bulf formulae.
3557      - exf_init.F modify #ifdef for exf_init_evap
3558      - exf_getffieldrec.F, ctrl_getrec.F
3559        The following INT-usages are not safe:
3560          fldsecs  = int(fldsecs/fldperiod)*fldperiod
3561          fldcount = int(fldsecs/fldperiod) + 1
3562        and were modified.
3563    o autodiff: checkpoint_lev...
3564      - updated storing for bulk formulae (some arrays were missing)
3565      - added state for seaice package
3566      - synchronized with main branch
3567    o DIVA:
3568      Modif.s in
3569      - the_main_loop.F
3570      - the_model_main.F
3571      and added cost_final_restore.F cost_final_store.F
3572      o With these changes, it is possible to fully separate
3573        the first forward run to compute the cost function (mdthe_main_loop)
3574        and adjoint runs over individual DIVA intervals (adthe_main_loop)
3575        into separate model executions.
3576        This enables better tuning of DIVA to given queue sizes.
3577      o Loss of cost function value in consecutive DIVA runs is
3578        fixed by storing to 'costfinal' file.
3579      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
3580        beginning/end of adjoint integration is accounted for.
3581      The current changes apply to TAF-1.4.26.
3582      TAF has one remaining bug, requiring one manual change
3583      (see MITgcm manual).
3584    o cal: synchronized between MAIN and ecco-branch
3585    
3586    checkpoint48i_post
3587    o Changes to restore differentiability of code w.r.t. previous tag
3588      (mostly adding new routines to make list and replacing
3589      pressure by totPhiHyd).
3590    o Updated and merged grdchk package
3591      - has both ADM and TLM checks
3592      - works for single- and multi-proc.
3593      - output cleaned
3594      - worked successfully for parallel DIVA
3595    o genmake:
3596      - Adding -platform=SP4
3597      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
3598    o Modif. for DIVA:
3599      ctrl_unpack should not be called in intermediate DIVA interval.
3600      (similar thing would apply for active files such as
3601      tbar, sbar, psbar, which should not be reinitialised;
3602      only relevant for ecco-branch)
3603    
3604    checkpoint48h_post
3605    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
3606    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
3607    o Added SEAICE_initialHEFF to pkg/seaice
3608    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
3609    
3610    checkpoint48g_post
3611    --- EOS:
3612    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
3613      store total Potential in totPhyHyd for diagnostics & EOS.
3614    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
3615    --- Pressure/geopotential gradient:
3616    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
3617    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
3618      ( changes results of global_ocean_pressure )
3619    o NLFS + z-coord.: add eta*Rho' contribution.
3620    o accurate phiHyd when using interface-W at the middle between 2 centers
3621     ( changes results of ideal_2D_oce )
3622    o includes r* 2nd term in potential gradient.
3623    
3624    checkpoint48f_post
3625    Merging from release1_p12:
3626    o Modifications for using pkg/exf with pkg/seaice
3627      - improved description of the various forcing configurations
3628      - added basic radiation bulk formulae to pkg/exf
3629      - units/sign fix for evap computation in exf_getffields.F
3630      - updated verification/global_with_exf/results/output.txt
3631    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
3632      (SBO) core products, including oceanic mass, center-of-mass,
3633      angular, and bottom pressure (see pkg/sbo/README.sbo).
3634    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
3635      to avoid negative values in shallow regions.
3636      - updated verification/natl_box/results/output.txt
3637      - updated verification/lab_sea/results/output.txt
3638    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
3639    o Added useSingleCpuIO option (see PARAMS.h).
3640    o Updated useSingleCpuIO option in mdsio_writefield.F to
3641      work with multi-field files, e.g., for single-file pickup.
3642    o pkg/seaice:
3643      - bug fix in growth.F: QNET for no shortwave case
3644      - added HeffFile for specifying initial sea-ice thickness
3645      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
3646    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
3647      kpp_transport_t.F, forward_step.F, and the_main_loop.F
3648    o pkg/seaice:
3649      - adjoint-friendly modifications
3650      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
3651    
3652    checkpoint48e_post
3653    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
3654    o dynamics: change definition of computational domain & adapt mom_fluxform
3655      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
3656    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
3657        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
3658        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
3659        global_ocean.90x40x15 global_with_exf global_ocean_pressure
3660        inverted_barometer solid-body.cs-32x32x1
3661      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
3662    
3663    checkpoint48d_post
3664    o in preparation for r*:
3665     a) use pre-computed gradient of hydrostatic potential:
3666        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
3667     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
3668        => affects results of glob_oce_pressure (different truncation error)  
3669      update output.txt of ideal_2D_oce & global_ocean_pressure
3670    
3671    checkpoint48d_pre
3672    o in preparation for r*:
3673      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
3674      pass the 2 comp. of the grad. as arguments to momentum S/R.
3675      but for the moment, only used if it does not change the results.
3676    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
3677    
3678    checkpoint48c_post
3679    Modifications in treatment of initial flux forcing controls
3680    to avoid extra storing of flux fields.
3681    
3682    checkpoint48c_pre
3683    o Added tidal_basin_2d experiment (currently 1D!)
3684    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
3685    
3686    checkpoint48b_post
3687    o r* coordinate added in #ifdef NONLIN_FRSURF block.
3688     (modification to pressure gradient not yet implemented)
3689    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
3690      (for U & V) that are used for vertical advection of momentum.
3691    
3692    checkpoint48a_post
3693    o In preparation for r*, use temp. array to compute vertical transport
3694       in flux-form momentum pkg. => change results of few test-exp.
3695      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
3696                        lab_sea, natl_box & plume_on_slope
3697    
3698    checkpoint48
3699    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
3700    
3701    checkpoint47j_post
3702    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
3703    o moved adexch from forward_step to addummy_in_stepping
3704    o added exch in ctrl_map_...
3705    o aveFreq.=0. at end of cost_final to avoid overwrite in
3706      reverse checkpointing loop
3707    o Yet more changes in gmredi:
3708      * adgmredi_calc_tensor
3709        avoiding all recomputation of gmredi_slope_limit
3710      * adgmredi_x/y/rtransport
3711        added flag for excessive storing to avoid recomp. of
3712        u/v/rtans, dTdx/y/z
3713        -> this is not really necessary and very memory-consuming
3714      * adgmredi_slope_psi:
3715        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
3716      * gmredi_slope_limit
3717        re-activated full calculation of taperfct for case 'ac02'
3718    o updating verification/ adjoints of carbon, global_ocean.90x40x15
3719    
3720    checkpoint47i_post
3721    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
3722    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
3723      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
3724    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
3725    o gmredi: fix few bugs.
3726    
3727    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
3728    This will be a good checkpoint to plug into the ecco-branch.
3729    o few modif.'s to get latest version adjointed
3730      (mainly kick out code in ini_linear_phisurf)
3731    o modif's to run adjoint with exactConserv
3732    o case GM_BOLUS_ADVEC should be cleaned
3733      S/R gmredi_slope_psi should be cleaned
3734    o verification/carbon now has exactConserv=.TRUE.
3735    
3736    checkpoint47g_post
3737    o time-average AIM output: becomes independent from statvars time-average
3738      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
3739    o After TAF bug fix:
3740      Tested adjoint of gmredi package.
3741      Tests were done with checkpoint47 rather than with latest
3742      checkpoint47f_post since the latter is broken for the adjoint
3743      verification/carbon/ contains both ADM and TLM gradient checks.
3744    Here they are, before they get changed/lost/stolen.
3745    Mostly modif.'s to fix numerical sensitivities.
3746    Gradient checks OK for
3747    - GM_taper_scheme:
3748      * clipping
3749      * ac02
3750      * linear
3751      * glw91
3752      * dm95
3753      * ldd97
3754    - GMREDI_OPTIONS:
3755      * GM_VISBECK_VARIABLE_K
3756      * GM_NON_UNITY_DIAGONAL
3757      * GM_EXTRA_DIAGONAL
3758      * GM_BOLUS_ADVEC
3759    in conjunction with data.gmredi parameters to be checked in
3760    in a few minutes under verification/carbon/code/
3761    
3762    checkpoint47f_post
3763    Merging from release1_p10:
3764    o modifications for using pkg/exf with pkg/seaice
3765      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
3766        and SEAICE_EXTERNAL_FLUXES
3767      - pkg/exf CPP options EXF_READ_EVAP and
3768        EXF_NO_BULK_COMPUTATIONS
3769      - usage examples are Experiments 8 and 9 in
3770        verification/lab_sea/README
3771      - verification/lab_sea default experiment now uses
3772        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
3773    
3774    checkpoint47e_post
3775    o created a tag prior to creating a branch
3776    
3777    checkpoint47d_post
3778    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
3779      at the bottom boundary had an erroneous half slip boundary condition
3780    o added bottom drag and no slip boundary condition capabilities to
3781      oceanic pressure coordinates code
3782    o added new verification experiment global_ocean_pressure, this experiment is
3783      also described in the tutorial section of the manual
3784    checkpoint47d_pre
3785    
3786    checkpoint47c_post
3787    o Added a verification experiment for a global cubed-sphere ocean run
3788      -  verification/global_ocean.cubed32x32x30
3789      -  uses pkg/therm_seaice and pkg/bulk_forcing
3790    
3791    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
3792    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
3793      when using P-coordinate; only implemented for atmospheric config.
3794    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
3795      NOTES: requires option NONLIN_FRSURF to be "#define".
3796    o update advect_xz/results/output.txt (left from checkpoint44g_post)
3797    
3798    checkpoint47b_post
3799    Merging from release1_p9:
3800    o pkg/seaice
3801      - removed GOTO's and added taf directives
3802      - double precision constants to reduce the g77 (Linux)
3803        to F77 (SGI) differences reported in release1_p8
3804    o tools/genmake
3805      - added SGI options
3806    o verification/testscript
3807      - updated to that of checkpoint47a_post
3808    o verification/global_ocean.90x40x15/input/eedata
3809      - modified for SGI f77 compatibility
3810    o verification/lab_sea
3811      - added description of sea-ice model
3812      - added missing matlab routines
3813      - added test of thermodynamics parallelization
3814    
3815    checkpoint47a_post
3816    o new pkg: aim_v23
3817     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
3818       for now, keep the same surface forcing as before.
3819     - Part-Cell implemented into AIM; check that Heat & Water are conserved
3820     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
3821     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
3822    o add diagnostic of surface correction term in monitor output
3823    
3824    o bulk_force and therm_seaice
3825    - Two packages:  bulk_force (Bulk forcing)
3826      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
3827    - Earlier integration from Stephaine Dutkiewicz
3828      and Patrick Heimbach.
3829    - Two ifdef statements for compile time,
3830       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
3831    
3832    checkpoint47
3833    differentiable version of checkpoint46n_post
3834    o bug fix in quasihydrostaticterms
3835    o * "clean" adjoint code (in terms of extensive recomputations)
3836        can now be obtained for all GMREDI options (i.e. for
3837        - GM_VISBECK_VARIABLE_K
3838        - GM_NON_UNITY_DIAGONAL
3839        - GM_EXTRA_DIAGONAL
3840        - GM_BOLUS_ADVEC )
3841      * However, wrong gradient check problem remains unsolved.
3842      * New CPP options have been introduced for different
3843        tapering schemes
3844    o external_fields_load now part of differentiation list
3845    o pressure needs multiple storing;
3846      would be nice to have store_pressure at beginning or
3847      end of forward_step, e.g. by having phiHyd global (5-dim.)
3848      (NB: pressure is needed for certain cases in find_rho,
3849      which is also invoked through convective_adjustment).
3850    o recomputations in find_rho for cases
3851     'JMD95'/'UNESCO' or 'MDJWF' are OK.
3852    o #define ATMOSPHERIC_LOADING should be differentiable
3853    o ini_forcing shifted to begining of initialise_varia
3854    o Incorporating QNVS line search routines into MITgcm
3855      (this is separate code, and therefore not under pkg)
3856      lsopt/, optim/
3857    o Updated verification/carbon/
3858      - #define GM_VISBECK_VARIABLE_K
3859      - GM_taper_scheme    = 'ldd97'    
3860    
3861    checkpoint46n_post
3862    Merging from release1_p8:
3863    o verification/natl_box:
3864      updating new external_fields_load routine
3865    o New package: pkg/seaice
3866      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
3867      The sea-ice code is based on Hibler (1979-1980).
3868      Two sea-ice dynamic solvers, ADI and LSR, are included.
3869      In addition to computing prognostic sea-ice variables and diagnosing
3870      the forcing/external data fields that drive the ocean model,
3871      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
3872      The implied surface heat flux is then stored in variable
3873      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
3874      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
3875      non-local transport term.  Because this call precedes model
3876      thermodynamics, temperature under sea-ice may not be "exactly" at
3877      the freezing point by the time theta is dumped or time-averaged.
3878      N.B.: fairly large differences in accuracy occur across
3879            different platforms/compilers; comparison between
3880            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
3881            generated output gives:
3882       T           S           U           V
3883      C D M    c        m  s        m  s        m  s        m  s
3884      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
3885      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
3886      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
3887    
3888      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
3889    o GAD:
3890      - generated new common blocks to account for call of
3891        same gad routines with differing traceridentities
3892        (needed to modify tracerIdentity indices in GAD.h)
3893      - generated separate common blocks for case useCubedSphereExchange
3894        (Department of Futurology)
3895      - parameter lists to gmredi_?transport: added tracerIdentity
3896      - added new key indices to tamc.h
3897    o external_fields_load:
3898      - added this routine to TAF list
3899      - needed to make some common blocks global and additional storing
3900        along the same lines as exf package (checkpoint_lev?_directives.h)
3901    o exf:
3902      updated external forcing package
3903      - bug fixes carried over from ecco-branch
3904        (missing OBCS_OPTIONS.h in two routines)
3905      - enable easy to use "no forcing".
3906      - added exf I/O for atmospheric loading
3907      - added exf I/O for runoff data
3908      - transfered scaling between exf <-> MITgcm to exf namelist
3909    o Adding new verification experiment global_with_exf.
3910      This verification experiment is almost identical to the
3911      global_ocean.90x40x15 experiment, except that it uses
3912      the exf (and cal) package instead of the
3913      external_fields_load routine (cf README file).
3914    
3915    checkpoint46m_post
3916    o modified testscript to return -- when there are no lines of "%MON" output
3917    o added new flag "quasiHydrostatic" for QH mode
3918      and new routine quasihydrostaticterms()
3919    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
3920      New routine: mom_u_coriolis_nh()
3921    o fixed sign of non-hydrostatic metric terms in u and v equations.
3922      Depend on correct sign of gravitySign.
3923    o added work.pc* to .cvsignore in aim directories using ifc
3924    o introduced flag for controllin non-hydrostatic metric terms
3925    o removed gravitySign from PARM04
3926    o switched to g77/ifc from pgf77 in aim experiments
3927    
3928    checkpoint46l_post
3929    o made convective adjustment work with pressure coordinates:
3930     - changed the direction of k-loop in convective_adjustment.F for the
3931       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
3932     - adjusted the reference pressure k-index in convective_adjustment.F
3933     - adjusted the convection condition in convect.F (in analogy to
3934       calc_ivdc.F)
3935     - convective_adjustment no longer computes anything on the halos
3936     - removed the warnings about negative salinity from find_rho.F and
3937       find_alpha.F; instead the new routine look_for_neg_salinity, called
3938       at the beginning of find_rho, find_alpha, and find_beta, does a
3939       check of the entire slice, if CPP-option
3940       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
3941    checkpoint46l_pre
3942    
3943    checkpoint46k_post
3944    o fixed the verification/global_ocean.90x40x15 experiment:
3945     - new bathymetry (the world according to A., JMC, and M.)
3946     - new initial fields and forcing fields (*.bin files)
3947     - new POLY3.COEFFS (for the next release one should switch to a full
3948       equation of state: JMD95P or MDJWF)
3949     - fixed several errors and redundancies in the data file
3950     - experiment uses looped cells
3951     - added matlab directory with diagnostic scripts for plotting of output
3952    
3953    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
3954     - read AIM physics parameters from a file (data.aimphys)
3955     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
3956    
3957    checkpoint46j_post
3958    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
3959    o move wVel computation at the end of the time step, in S/R integr_continuity
3960    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
3961    o update timeave pkg for wVel diagnostic.
3962    checkpoint46j_pre
3963    
3964    checkpoint46i_post
3965    o Clean up AIM package (and keep the results unchanged):
3966      include CPP_OPTION and use IMPLICT NONE in all routines ;
3967      declare all the variables _RL ; use _d 0 for all numerical constants.
3968      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
3969    
3970    checkpoint46h_post
3971    o cleaned up the use of rhoNil and rhoConst.
3972      - rhoNil should only appear in the LINEAR equation of state, everywhere
3973        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
3974        and the dynamical equations are all divided by rhoConst
3975    o introduced new parameter rhoConstFresh, a reference density of fresh
3976      water, to remove the fresh water flux's dependence on rhoNil. The default
3977      value is 999.8 kg/m^3
3978    o cleanup up external_forcing.F and external_forcing_surf.F
3979      - can now be used by both OCEANIC and OCEANICP
3980    checkpoint46h_pre
3981    
3982     Added code to convert surface volume flux (fresh water) into
3983     a mass flux when using P coordinates in the ocean (OCEANICP).
3984     Note: It assumes you have set rho0=rhoConst=density of fresh water.
3985    
3986    checkpoint46g_post
3987    o Include a new diagnostic variable phiHydLow for the ocean model
3988      - in z-coordinates, it is the bottom pressure anomaly
3989      - in p-coordinates, it is the sea surface elevation
3990      - in both cases, these variable have global drift, reflecting the mass
3991        drift in z-coordinates and the volume drift in p-coordinates
3992      - included time averaging for phiHydLow, be aware of the drift!
3993    o depth-dependent computation of Bo_surf for pressure coordinates
3994      in the ocean (buoyancyRelation='OCEANICP')
3995      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
3996        Theta, Salinity, and Pressure in the parameter list. This routine is
3997        presently contained in find_rho.F. This routine does not give the
3998        correct density for 'POLY3', which would be a z-dependent reference
3999        density.
4000    o cleaned up find_rho
4001      - removed obsolete 'eqn' from the parameter list.
4002    o added two new verification experiments: gop and goz
4003      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
4004    checkpoint46g_pre
4005    
4006    checkpoint46f_post
4007    o Enable tangent linear (forward mode) gradient checks:
4008      - extended active file handling to g_... files
4009      - added TANGENT_SIMULATION to theSimulationMode
4010      - extended grdchk package accordingly
4011    o added tangent linear setup in verification/carbon/code_ftl
4012    o added adjoint setup in verification/front_relax/code_ad
4013    
4014    checkpoint46e_post
4015    o Added new equation of state -> MDJWF
4016      - EOS of McDougall et al., 2002, JAOT, submitted
4017      - caveat: the equation of state is only valid for a smaller (more
4018        realistic?) range of values than JMD95P/Z and UNESCO
4019      - added masks to the calculation of pressure in store_pressure
4020      - added more check values for density in check_eos (ini_eos.F), some of
4021        the old check values are out of the range of the MDJWF-eos, so don't
4022        expect perfect matches for those
4023    checkpoint46e_pre
4024    
4025    checkpoint46d_post
4026    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
4027      'OCEANICP', also initialised field pressure correctly in ini_eos in the
4028      case of pressure coordinates. eosType='JMD95Z' in
4029      combination with buoyancyRelation='OCEANICP' now causes an error.
4030    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
4031      in find_alpha/beta.
4032    checkpoint46d_pre
4033    
4034    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
4035      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
4036    
4037    checkpoint46c_post
4038    o Changes necessary for ocean in p-coordinates
4039     -  Added new buoyancy relation = 'OCEANICP'
4040     -  Added new parameters = gravitySign (this used to be contained inside
4041        the factor dRdZ which I added when we first switched to R coordinates).
4042     X GM/Redi is not compatible (yet)
4043     X bottom drag and no-slip need to be debugged.
4044    checkpoint46c_pre
4045    
4046    checkpoint46b_post
4047    o Added new equation of state -> JMD95Z and JMD95P
4048      - EOS of Jackett and McDougall, 1995, JAOT
4049      - moved all EOS parameters into EOS.h
4050      - new routines ini_eos.F, store_pressure.F
4051    o Added UNESCO EOS, but not recommended because it requires
4052      in-situ temperature (see JMD95)
4053    o Modified formatting for knudsen2.f in utils/knudsen2 and added
4054      unesco.f to be used with POLY3
4055    checkpoint46b_pre
4056    
4057    checkpoint46a_post
4058    o Added (atmospheric) pressure loading
4059      - new field in FFIELDS.h, etc...
4060      - new cpp flag ATMOSPHERIC_LOADING
4061    o Changed hFacC to _hFacC in calc_phi_hyd.F
4062    o Added SHORTWAVE_HEATING to some files for consistency
4063    checkpoint46a_pre
4064    
4065    checkpoint46
4066    further merges from release1_p5
4067    o new ctrl package
4068      - adopted from ECCO environment to enable optimization
4069      - added Eliassen Palm fluxes to controls
4070    o added Eliassen Palm flux controls to gradient check package
4071    o cost package
4072      - Compatible with new ctrl package
4073      - added Eliassen Palm cost hooks
4074      - modif's of existing cost functions
4075    o Adjoint-related bug fixes in kpp:
4076      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
4077      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
4078    o autodiff package
4079      - flow directives:
4080        + new for S/R do_the_model_io
4081        + enhanced for S/R checkpoint
4082        + new gmredi.flow
4083      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
4084        disable adcommon.h/g_common.h by default.
4085      - fixed problem for adjoint of global_max
4086    o modified verification/carbon/
4087    o New setup for adjoint of global_ocean
4088    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
4089    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
4090    o incorporated hooks for sponge layer code (external_forcing.F)
4091    
4092    checkpoint45d_post
4093    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
4094    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
4095      (affects plume_on_slope "cg2d" output)
4096    o add new parameter deltaTfreesurf for free-surface time stepping
4097    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
4098    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
4099    o change phiMin in exp1 (to agree with documentation)
4100    o add new flags:
4101     - T,S forcing inside/outside Adams-Bashforth
4102     - turn off temp,salt advection and/or forcing
4103     - for each tracer, define internal flag for multiDimAdvection & A-B
4104    o monitor: change definition of KE to check conservation of Energy
4105    
4106    checkpoint45c_post
4107    o Removed f90 comments ("!")
4108    o Modified initialisations to enable exf package for MITgcm
4109      (without invoking ECCO_PACKAGE).
4110    o modifications to gradient check package (Martin Losch)
4111      - enable centered differences
4112      - modified format of standard output
4113    
4114    checkpoint45b_post
4115    o cleaned exchange calls in cg2d
4116    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
4117    o included CPP option SINGLE_LAYER_MODE in thermodynamics
4118      to configure barotropic setup (Martin Losch)
4119    o moved some initialisations within bi,bj loop in dynamics
4120      (TAF flow dependency)
4121    o in initialise_varia, moved call packages_init_variables
4122      before convective_adjustment_init
4123      (corresponding adjustment of TAF tape initialisation).
4124    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
4125    
4126    checkpoint45a_post
4127    o compute Rho over the whole domain (extend iMin,jMin indices)
4128    o specific exchange for X-slice domain (case Ny=1)
4129    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
4130    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
4131    
4132    checkpoint44h_post = checkpoint45
4133    o Fix to restore differentiability:
4134      place at which packages_init_variables is called in
4135      initialise_varia is crucial for reverse control flow.
4136    o modifications in GMRedi to enable stable adjoint
4137      (corresponding modif's in thermodynamics, dynamics)
4138    o added missing hook for sponge layer code in external_forcing
4139    o modified test cost functions
4140    o storing in gad_advection (plus removal of write(0,*)!
4141    o missing headers TR1.h added in convective_adjustment routines
4142    o errorMessageUnit set non-equal zero in eeboot
4143      (conflict on some platforms, e.g. IBM SP3)
4144    o modified carbon verif.
4145    
4146    checkpoint44h_pre
4147    o vertical grid option: allow to put the Interface at the middle between
4148      2 cell-centers ; replace delZ in pkg/kpp by drF.
4149    o GM Advective form: Tracers are advected using the residual transport (=
4150      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
4151    
4152    checkpoint44g_post
4153    o fix surface correction term in multiDimAdvection (affects plume_on_slope
4154      results) ; ifdef missing in thermodynamics.F
4155    
4156    checkpoint44f_pre,checkpoint44f_post
4157    o added PTRACERS package
4158      This allows an arbitrary number of passive tracers to be integrated
4159      forward simultaneously with the dynamicaly model.
4160      + Implemented so far:
4161        - basic forward algorithm (time-stepping, advection, diffusion, convection)
4162        - I/O and checkpointing
4163        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
4164      + Not implemented so far:
4165        - KPP
4166        - OBCS
4167      + No specific example supplied (yet) but global_ocean.90x40x15 has the
4168        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
4169        line in data.pkg.
4170      + This package is disabled by default since it increases storage.
4171    
4172    
4173    o testscript: added -cleanup option
4174    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
4175                 b) enable to filter 2D fields.
4176    
4177    checkpoint44e_pre,post
4178    o re-wrote convective adjustment to use pre-calculated weights
4179      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
4180      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
4181      Original calls to convect() still in place.
4182    
4183    chkpt44d_pre,post
4184    o added missing EXCLUDE_MONITOR flags
4185    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
4186      (incompatible typ in MIN/MAX expressions caused problems
4187      on IBM SP3)
4188    o in genmake added variable MAKEDEPEND
4189      plus resetting for case SunOS
4190    o added timer_stats.c routine for IBM SP3
4191    o removed variables in dynamics
4192    !!! I forgot to create tag chkpt44d_pre !!!
4193    !!! But chkpt44d_pre = chkpt44c_post    !!!
4194    
4195    o real fresh water flux implemented with non-linear free-surface.
4196    
4197    chkpt44c_pre,post
4198    o few fix (mask in shap_s2, EmPmR in external_field_load,
4199      USE_NATURAL_BCS in solve_for_P);
4200    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
4201    
4202    checkpoint44b_pre/_post
4203    o merge of relevant stuff from the ecco-branch:
4204      - genmake: removed $S64 overwrite for case SunOS
4205      - pkg/exf: update and corrections for field swapping and obcs
4206      - pkg/ecco: parameter lists for the_model_main, the_main_loop
4207                  harmonized between ECCO and MITgcm
4208      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
4209                      updated checkpointing_lev... lists for obcs
4210      - model/src: minor changes in forward_step, plot_field
4211                   added directive for divided adjoint in the_main_loop
4212      - pkg/mdsio: added mdsio_gl_slice
4213    
4214    o check parameters & config (chkpt44a_pre,post)
4215    o OBC and NonLin_FrSurf.
4216    
4217    checkpoint44
4218    o fix bug in mom_vi_del2uv
4219    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
4220    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
4221    o update AIM experiments (NCEP input files)
4222    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
4223    o added some stuff for AD
4224    
4225    checkpoint43
4226    o added two new advection tests
4227    o added global 4x4 degree ocean test
4228    o added test of H&S94 with free surface on cube
4229    o some final mods for gradient check, adjoint,...
4230    
4231    checkpoint42
4232      Fixed AD-related problems:
4233    o Store directives up-to-date with re-arranged Adams-Bashforth
4234      (mainly thermodynamics.F)
4235    o New store directives for multi-dim. advection schemes
4236      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
4237      * new common block and key passkey
4238      (mainly gad_advection.F)
4239    o Modified store directives for split of dynamics/thermodynamics
4240      for the case ALLOW_KPP
4241    o Cleaned argument list for timestep_tracer.F
4242    
4243    checkpoint41
4244    o re-formatted/added comments in prologues of key subroutines
4245      to work with protex
4246    
4247  checkpoint40  checkpoint40
4248  o moved calc_gs, calc_gt and calc_tr1 back to model/src  o moved calc_gs, calc_gt and calc_tr1 back to model/src
4249  o added FLT (floats) package from Arne along with demo. experiment  o added FLT (floats) package from Arne along with demo. experiment

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