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revision 1.1602 by mlosch, Thu Mar 1 23:58:43 2012 UTC revision 1.1847 by heimbach, Wed Apr 3 21:46:29 2013 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o verification/global_ocean.90x40x15 and OpenAD:
8      New experiment for OpenAD is identical to the one in input_ad except that
9        multiDimAdvection=.FALSE.,
10      There is still an issue with this.
11    o pkg/thsice:
12      - account for ice velocity (ocean relative velocity) in turbulent heat flux
13        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
14        and offline_exf_seaice (main test).
15    
16    checkpoint64f (2013/03/31)
17    o verification/OpenAD:
18      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
19    o verification/isomip, pkg/shelfice and OpenAD:
20      - add OpenAD setup to this exp and make shelfice package work with OpenAD
21    o verification/tutorial_global_oce_biogeo:
22      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
23    o verification/offline_exf_seaice:
24      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
25    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
26      - add OpenAD setup to this exp and make ptracers package work with OpenAD
27    o pkg/seaice/seaice_evp.F:
28       mask the asymmetric contribution of the ice-ocean stress (when
29       the turningAngle is non-zero) over open water to avoid stripes
30       in the EVP-solutions after many EVP-substeps. This does not change
31       the verification experiment (because turningAngle=0 in that experiment),
32       but will affect other EVP solutions with turningAngle.ne.0
33    o verification, AD & TLM output:
34      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
35        additions and multiplications which affect results at machine truncation
36        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
37        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
38        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
39        digits of matching.
40    o pkg/seaice:
41       modify lsr-algorithm so that it vectorizes AND converges by using a
42       "zebra" method: split vector loop into two with step size 2; this
43       solves a general convergence problem for the JFNK solver on a vector
44       computer. It has the potential to even improve convergence for
45       non-vector machines, but it does change the results so it is turned
46       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
47       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
48    
49    checkpoint64e (2013/03/05)
50    o pkg/ecco and several verification experiments:
51       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
52       from ecco package, and revert to unified routine in model/src/
53       Adjust verification experiments accordingly, especially gloal_oce_llc90
54       Should conclude long-standing work by Gael to reconsile the_main_loop with
55       ECCO and will enable OpenAD's revolve loop in ECCO setup.
56    o pkg/generic_advdiff:
57      - implement compressible flow method for multi-dim advection (similar to
58        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
59        TAF generates many recomputations) to use it; no yet coded with implicit
60        vertical advection.
61      - change experiment advect_cs (new output) and advect_xy (same output)
62        to test compressible flow multi-dim advection.
63    o pkg/generic_advdiff:
64      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
65        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
66    o pkg/seaice:
67      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
68        bug affects two verification experiments (lab_sea and lab_sea.hb87),
69        recover old (wrong) results by setting noSlipFac = 2. in
70        seaice_calc_strainrates.F;
71      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
72      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
73        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
74      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
75    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
76      - new subroutines seaice_lsr_tridiagu/v
77      - introduce loop bounds i/jmin/max to be able to use a restricted
78        additive Schwarz method, but not used for now.
79      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
80      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
81    o OpenAD support
82       Reorganize S/R call for overall time-stepping loop to facilitate
83       OpenAD revolve loop replacement
84       (new S/R main_do_loop.F)
85    o model/src:
86      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
87      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
88        ADAMS_BASHFORTH2.
89    o pkg/cheapaml:
90      - add new parameter (default=F, same as before) to disable full domain
91        (including land) periodicity in X & Y dir.
92      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
93        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
94        into single S/R CHEAPAML_TIMESTEP.
95    
96    checkpoint64d (2013/02/17)
97    o pkg/monitor (angular momentum):
98      - do not add Eta contribution to the total AM if using rigid-lid;
99      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
100      - horizontal discretisation: compute Zonal wind contribution separately for
101        each component (instead of from cell centered averaged) and use the 4
102        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
103      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
104        FreeSurf) if using vectorInvariant momentum.
105    o model/src (horizontal grid):
106      - move initialisation of all horizontal grid arrays to null value
107        from specific horizontal grid S/R to main S/R INI_GRID;
108      - add 2 new arrays to project model C-grid velocity on to zonal direction
109        (similar to AngleCosC & -AngleSinC but at U and V point location) and
110        compute them in S/R CALC_GRID_ANGLES.
111    o pkg/seaice: replace a hard coded parameter by a runtime parameter
112        SEAICE_JFNK_tolIter
113    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
114        preconditioner for JFNK (run LSR into the overlaps as far as possible,
115        i.e OLx/y-2, but overwrite the solution in the overlaps)
116      - extend loop range in seaice_calc_viscosity
117      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
118      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
119      - slightly modify loops in tridiagonal solver lsr-preconditioner
120      - by default remove the extra exchange in seaice_preconditioner with a
121        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
122      - modify offline_exf_seaice so that old results without RAS are reproduced
123        for output.dyn_jfnk.txt
124      in seaice_fgmres.F (unrelated to RAS)
125      - add a cpp-flag option for a re-ordered mapping (potentially more
126        efficient), but because this changes the results, turn it off by
127        default
128      - replace the save statement by local common blocks
129    o utils/matlab:
130      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
131      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
132        instead of local script "load_cs.m".
133    o pkg/seaice:
134      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
135        to the scalarProductMetric and the unrolling. By chance this does not
136        change the verification experiment, because of the particular domain
137        decomposition
138    o pkg/diagnostics:
139      - change default missing_value from UNSET_RL to -999.
140    o pkg/layers: improve vectorization of layers_fluxcalc.F
141      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
142        time spent in this routine by more than a factor of 3 on an NEC-SX8
143      - step 2: replace search algorithm by a bisection algorithm found in
144        Press et al. Numerical Recipes in Fortran. This algorithm can be
145        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
146        For now, use this algorithm only for TARGET_NEC_SX defined.
147      - moved the search algorithm into a separate subroutine, that is kept
148        within the same file for automatic inlining.
149      - modified catching potential errors
150    o pkg/ecco:
151      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
152    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
153      - modifications for ALLOW_GENTIM2D_CONTROL
154      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
155      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
156      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
157      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
158    o model/src:
159      - account for moist thermodynamics in (dry) potential temperature equation;
160        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
161        and cpl_aim+ocn.
162      - also switch to standard compiler (gfortran, was using ifort previously)
163        for fizhi-cs experiments reference output.
164    o pkg/ctrl:
165      - 1st step toward generic time-varying control variable (2D) via CPP option
166        ALLOW_GENTIM2D_CONTROL
167      - note new namelist ctrl_nml_genarr in data.ctrl
168    o verification/global_ocean.cs32x15:
169      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
170        thsice calling sequence and update "output.icedyn.txt" output file.
171    o pkg/ptracers:
172      - from Ryan A.: code to allow to restart a tracer at regular time interval
173        specifying a reset frequency and a reset-phase (for each tracers).
174    o pkg/thsice:
175      - implement new sequence of calls for thsice+seaice:
176          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
177          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
178      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
179        in CPP_OPTIONS.h) to recover old sequence;
180      - update diagnostics for Intermediate State thsice diagnostics: now filled
181        just before advection (instead of just after advection in old sequence);
182      - update output of experiment offline_exf_seaice (standard test);
183      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
184        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
185    o pkg/aim_v23:
186      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
187      - use standard pkg/mdsio routines to read & write CO2 pickup file;
188      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
189      - Implement new sequence of calls for seaice advection (with thsice and
190        seaice diffusion): do ice advection after ice-Thermodynamic (previously
191        was done before); change aim_do_physics.F (split the bi,bj loops block);
192      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
193    o pkg/thsice:
194      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
195        where just seaice diffusion is used without seaice-dynamics.
196    
197    checkpoint64c (2013/01/18)
198    o pkg/seaice:
199      - add a parameter JFNKres_tFac that can replace JFNKres_t
200        (= JFNKres_tFac*JFNKresidual before JFNK solver)
201      - add a line search option to the JFNK solver
202      - move update of u/vIce and computation of initial residual into a separate
203        routine (same file); makes the code a little easier to read (?)
204      - the line search requires computation of the residual and for some reason
205        I cannot do the update of u/vIce at the beginning of the Newton loop
206        without changing the results, so we move computation of the new residual
207        also to the end of the Newton loop, even without the line search
208    o pkg/mdsio:
209      - write missing value (corresponding to undefined array value) to meta files;
210        skip this if missing value is one (UNSET_RL would be a better value for the
211        case of undefined missing value but it's current the default missing-value);
212        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
213    o pkg/exf & thsice:
214      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
215        diagnostics) even when SHORTWAVE_HEATING is #undef;
216    o verification/cfc_example:
217      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
218        illustrate how to use it).
219    o verification/offline_exf_seaice:
220      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
221        files to only one time-record.
222      in input.thermo: narrow the 2 bands of low initial ice-concentration near
223        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
224        snapshot output; same mcPheePiston value as in thsice with
225        surf-current=0.2m/s.
226      in input.thsice: similar set-up as in input.thermo (channel with same seaice
227        initial conditions).
228    o verification/cfc_example:
229      - update file "data" with more standard choice (default rotationPeriod,
230        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
231        set deltaTFreeSurf to deltaTtracer) and update the output.
232    o pkg/layers:
233      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
234      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
235    o verification/offline_exf_seaice:
236      - set all {field}period to zero for constant-in-time forcing (not tested
237        anywhere else).
238    o verification/offline_exf_seaice:
239      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
240      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
241    o model/src:
242      - implement Finite-Volume method for (hydrostatic) presure gradient
243        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
244    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
245      - In order to be compatible with the default EVP code, this requires changing
246        the EVP code around a little; and because any small change immediately
247        breaks the lab_sea.hb87 verification experiment, the reference output is
248        updated two times (each time the remaining aggrement was only 2 digits):
249        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
250        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
251        The adjoint test lab_sea.evp also needed to be updated.
252      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
253        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
254        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
255        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
256        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
257        kept obscure, because I need to test it a little more.
258    o pkg/cheapaml:
259      - fix few incorrect type (_RL/_RS) in subroutine calls.
260    o pkg/seaice:
261      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
262        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
263    o model/src:
264      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
265        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
266        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
267    o pkg/cheapaml:
268      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
269        update output of experiment cheapAML_box.
270      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
271        and set them only in one place (cheapaml_readparms.F).
272      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
273      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
274        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
275    o model/src/the_main_loop.F:
276      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
277    o pkg/seaice:
278      - remove legacy branch code.
279      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
280    o verification/*/code*/SEAICE_OPTIONS.h:
281      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
282        SEAICE_CAP_HEFF).
283    o pkg/cheapaml:
284      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
285        to load new forcing fields.
286      - add missing "_d 0" where it's needed; + some editing (improve indentation).
287      - remove switch to "-r8" compiler option (no longer needed) in verification
288        cheapAML_box, keep same output (small trucation error differences).
289    o verification/offline_exf_seaice:
290      - add thermodynamics only test.
291    o verification/cheapAML_box:
292      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
293        keep same output (same 14 digits for cg2d).
294      - switch on "-r8" compiler option (some numerical values are missing
295        the "_d 0") and update output (only 6 digits for cg2d were preserved).
296    
297    checkpoint64b (2012/12/24)
298    o pkg/cheapaml:
299      - remove un-used variables (Qnet,EmPmR) from pickup files.
300      - store tendency of advected variables into cheapaml pickup file
301        and fix the AB-2 restart.
302    o verification/offline_exf_seaice and lab_sea adjoint:
303      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
304      - switch to 4 time steps in offline, consistent with lab_sea.
305      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
306      - update results after change of experiment seaice.
307    o pkg/seaice:
308      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
309        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
310        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
311        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
312    o model/src:
313      - add run-time parameter to select CG2D solver minimum-residual solution
314        (in case of a poor convergence).
315    o pkg/seaice/seaice_lsr.F
316      - move calculation of matrix coefficients into new
317        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
318        file; the main purpose of this change is to be able to reuse the code
319        in S/R SEAICE_PRECONDITIONER
320      - modify the computation of the residual so that the mass of sea-ice
321        is not used twice; this simplifies the calculations, but since
322        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
323        not tested in testreport---this does not affect the testreport results.
324    o verification/seaice_obcs:
325      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
326        verification/lab_sea/input.salt_plume; changes results/output.txt*
327    o model/src:
328      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
329    o pkg/seaice:
330      - improve description of parameters in seaice_fgmres.F and start
331        cleaning up the code
332      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
333        second argument
334      - add a metric based on grid cell area to SEAICE_SCALPROD; update
335        results of offline_exf_seaice.dyn_jfnk
336      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
337    o pkg/aim_v23:
338      - fix an other bug in dissipation heating (grid-cell area was missing).
339    o model/src + pkg/seaice:
340      - add global (multi-tile) linear solver for pair of tri-diagonal system
341        along X and Y lines, respectively for U and V component.
342        Note: 1) MPI and cube-exchange not yet coded.
343            2) probably not accurate for poorly conditioned / large size problem.
344      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
345        default: not compiled and not used.
346    o pkg/seaice:
347      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
348        introduce bi/bj loops and use global_sum_tile_rl instead of
349        mpi_allreduce in seaice_fgmres.F
350      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
351      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
352      - add a verification experiment for JFNK in offline_exf_seaice
353    o verification:
354      - change (for now, only fwd test) offline_exf_seaice experiment:
355        use a re-entrant channel with idealized coastline (trapezoidal shape)
356        at southern boundary to explore seaice dynamics and thermodynamics
357        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
358        secondary test (input.thsice) use thermodynamics only with SST relaxation.
359      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
360    o pkg/exf:
361      - disable "sstExtrapol" when Nr=1
362    o verification:
363      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
364        to test pkg/cheapaml.
365    o pkg/aim_v23 & pkg/shap_filt:
366      - fix dissipation heating (erroneous gravity multiplication factor).
367    o pkg/seaice:
368      - remove unused field pressPre from jfnk solver
369      - rename two subroutines in seaice_preconditioner.F
370    o eesupp/src:
371       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
372    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
373       - remove wrong parts of the rhs and the lhs (were in there
374         because I did not understand the concept of this preconditioner)
375       - add an exchange between u- and v-sweep. This increases communication
376         by a factor of two but improves the convergence of jfnk. Ideally,
377         one would like the u- and v-sweep to be independent. So far within
378         undocumented ifdefs
379       - reorganize the extra computations for printing the residuals
380    o tools/genmake2:
381      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
382        since it's not necessary (and was preventing to use MNC in some cases).
383    
384    checkpoint64a (2012/11/16)
385    o pkg/autodiff:
386      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
387        autodiff_readparms.F no longer depends on calling order (within
388        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
389        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
390        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
391    o pkg/obcs:
392      - adding tidal velocity forcing capability to obcs
393        for usage example, see verification/seaice_obcs/input.tides
394    o pkg/seaice:
395      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
396        SEAICE_LSRrelaxU/V
397      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
398    o pkg/aim_v23:
399      - implement heating from friction (bottom friction and stratospheric drag).
400    o pkg/shap_filt:
401      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
402        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
403    o model/src:
404      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
405        time-constant addMass field from file (addMassFile);
406      - support for heating due to friction (and Kinetic Energy dissipation):
407        add option, run-time switch and 3-D field array + support code ; each pkg
408        or S/R can add heating contribution (if there is a sink of KE); the sum is
409        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
410    o pkg/seaice:
411      - complete merge of ITD code into seaice_growth.F
412        from MITgcm_contrib/torge/itd/code/
413        no verification so far, but Torge Martin tested
414        "1-D test case and Beaufort set up;
415        deliver okay results after 1 model year."
416      - complete merge of SEAICE_SIZE.h into all relevant routines
417      - move computation of eta at Z-points into calc_viscosities
418        + introduce global field etaZ
419        + add different methods for computing etaZ, for now the old
420          method (simple averages of eta to Z-points) is hardwired
421        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
422          seaice_preconditioner
423      - simplify computations for SEAICE_ZETA_SMOOTHREG
424      - seaice_preconditioner:
425        + replace one remaining press by pressLoc (mistake)
426        + adjust printing of residuals
427      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
428        + add (SEAICE.h) and rename some counters (initiliased in
429          seaice_init_fixed.F)
430        + add _BEGIN/END_MASTER (myThid)  around print statements
431        + print total number of iterations and failures over SEAICE_monFreq
432          interval to STDOUT
433      - move control over output-messages by fgmres to seaice_jfnk to save
434        some operations
435      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
436        in order to make restarts with sol .ne. zero (fgmres with restarts)
437        (seaice_jfnk.F, seaice_fgmres.F)
438      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
439        a serious convergence problem when open boundaries are involved
440    o pkg/ggl90: fix computation of control volumes for the case of
441      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
442      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
443    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
444    o pkg/autodiff
445      - Add inAdMode switch for SEAICEuseDYNAMICS:
446        SEAICEuseDYNAMICSinAdMode
447        (extend logic in ADAUTODIFF_INADMODE_SET)
448    o pkg/seaice
449      - Step 1 of merging ice-thickness distribution (ITD) code from
450        MITgcm_contrib/torge/itd/ (author: Torge Martin)
451        The code implements concept laid out in Thorndike et al. (1975);
452        code is enabled via CPP flag SEAICE_ITD
453        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
454        code is not complete yet!!
455      - SEAICE_SIZE.h now included in almost all seaice routines
456    o verification (using seaice):
457      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
458        global_ocean.cs32x15.seaice ; update results.
459      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
460      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
461        offline_exf_seaice (previously compiling B-grid).
462    o pkg/exf:
463      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
464        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
465        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
466    o pkg/layers (adjust changes from Sept 19):
467      - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
468        this allows to remove "layers_maxNum" dimension from all layers arrays.
469    o pkg/layers (adjust changes from Sept 19):
470      - remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ;
471      - snap-shot extended to all type of layers (not just the 1rst type);
472      - remove layers variables when corresponding CPP option is undef.
473    o pkg/layers:
474      - rename pkg/layers variable and add new output (layer exist & un-weighted
475        velocity in layer)
476    o pkg/seaice:
477      - simplify (?) ocean-drag coefficent computations by using
478        the same routine in all three solvers (saves some code lines)
479      - remove global fields DRAGA and DRAGS from C-grid code and
480        declare them locally in lsr.F (the only place where they are
481        still used)
482      - update AD output of lab_sea.evp (very sensitive anyway).
483    o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
484      (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
485      and SEAICEuseJFNK=.true. A few things to note:
486      - involves a FGMRES, that is parallel but very inefficient,
487        because of many scalar products (global sums) in the Gram-Schmidt
488        orthogonalization method. Needs to be replaced. Original code
489        from J.-F. Lemieux
490      - preconditioner for FGMRES is a stripped down version of LSOR
491      - SOLV_MAX_ITERS is now used for LSOR as a solver and as a
492        preconditioner. For the preconditioner, the default is set to 10.
493      - Jacobian times vector is computed with finite differences
494      - marginally related to JFNK-solver: add a smooth regularization for
495        zeta with tanh that will improve convergence (Lemieux and Tremblay,
496        2009) for any implicit solver (not implemented for EVP because EVP
497        does not need this regularization in the first place). Define
498        SEAICE_ZETA_SMOOTHREG in SEAICE_OPTIONS.h to use.
499    o eesupp/src:
500      - check in genmake2 that intrinsic S/R flush is available.
501      - add S/R to flush IO unit (if intrinsic S/R flush is available)
502      - flush standard & error msg unit before MPI termination
503      - if debugMode, flush IO unit after printing msg
504    o pkg/ctrl:
505      - ctrl_unpack.F, ALLOW_GENARR3D_CONTROL code: fix missing argument in call
506        to ctrl_set_unpack_xyz.
507    
508    checkpoint64 (2012/10/09)
509    o pkg/shelfice
510      - in mom_fluxform.F, mom_vecinv.F:
511        CALL SHELFICE_V_DRAG(bi,bj,k,vFld,KE,KappaRU,vF,myThid)
512        Bug fix KappaRU -> KappaRV
513        does not change verification/isomip but may change other setups
514        (presumably constant KappaRU=KappaRV)
515      - fix diagnostics SHIU/Vdrag (thanks to Tom Millgate)
516    o pkg/obcs:
517      - fixed some indexing bugs in obcs_seaice_sponge.F
518      - added obcs relaxation subroutines for HSALT and HSNOW
519      - changes verification/seaice_obcs/results/obcs_seaice_sponge.F
520    o pkg/seaice:
521      - add "multicategory" parameterization for snow in analogy to ice,
522        default is off for now.
523    o pkg/obcs:
524      - added obcs_seaice_sponge.F for obcs relaxation of seaice variables;
525        see verification/seaice_obcs/input.seaiceSponge for example application.
526      - remove local commom bloc "OBCS_GLOBAL" in obcs_readparms.F and do all the OB
527        index setting by master-thread. This fix multi-threads Pb in previous modifs.
528    o pkg/layers :
529      - add diagnostics to pkg/layers
530      - move the meat of pkg/layers from layers_calc.F to layers_fluxcalc.F
531        (from R.Tulloch). Layers_calc.F now calls layers_fluxcalc.F accordingly.
532    o pkg/generic_advdiff/gad_implicit_r.F :
533      - fix ADVr diagnostics in case of both implicit vertical advection and diffusion.
534    o pkg/seaice/seaice_growth.F:
535      - fix SItflux diagnostics in virtual salt flux + balanceEmpmr case.
536    o pkg/obcs:
537      - change default setting of OBCS_UVICE_OLD from defined to undef;
538      - use new parameter OB_indexNone for null index value (instead of hard-coded 0)
539        in all pkg/obcs code and in other pkgs; remove k loop in obcs_check_depths.F;
540      - pass OB_indexNone as (new) argument to S/R CTRL_MASK_SET_[X,Y]Z;
541      - change OB null index value (OB_indexNone) to -99 ; this fix the problem
542        with Southern & Western OB at a tile edge (at least in a simple set-up).
543    o pkg/obcs:
544      - change settings of OB index in case OB coincides with tile edge (shared by
545        2 tiles), so that common OB location is registered by both tiles (instead of
546        only 1). However, for Southern and Western OB, index value = 0 is not
547        recognized as valid OB index (=default null value) and needs to be fixed.
548      - modify accordingly OBCS_BALANCE_FLOW and OBCS_MONITOR (avoid double counting)
549      - new parameter "OB_indexNone" for null index value (for now, still zero)
550        to replace hard-coded null index value of zero.
551    o pkg/exch2:
552      - improve W2_USE_E2_SAFEMODE (faster) and W2_E2_DEBUG_ON:
553        always check buffer-size (but outside the loop); move checking for valid
554        index from W2_USE_E2_SAFEMODE to W2_E2_DEBUG_ON; in W2_E2_DEBUG_ON,
555        print each tile and point connection only if |W2_printMsg|>= 2 and 3.
556    o pkg/ctrl (pack & unpack):
557      - in ctrl_pack.F & ctrl_unpack.F, use the same local file-name variable
558        (locally defined) for different variables (+ remove the variable-specific
559        file name in CTRL_GENARR.h). For now, only implemented for GENARR2/3D_CONTROL
560        (to be extended to other local file names in ctrl.h).
561    o pkg/flt:
562      - add a FLT_Iter0 option (similar to PTRACERS_Iter0).
563    o pkg/mdsio:
564      - fix missing STOP in mdsio_readvec_loc.F (case ioUnit=0) when file is missing
565    o tools/genmake2:
566      - add similar dependences for target EXE_AD & EXE_FTL as we have for EXECUTABLE
567        (added by Alistair in version 1.51 for building without make depend);
568      - remove Header files list (H_SRC_FILES) from the dependence of targets
569         ad_input_code.f & ftl_input_code.f (not clear why it was added in the first
570        place in version 1.23): this save going through staf when unrelated header
571        file has been modified.
572       Note: for an intermediate target (e.g., ad_input_code.f or adtaf) without
573        "make depend" step, still need to do "make links" before "make adtaf".
574    o eesupp/src (+ few pkg src files) & genmake2:
575      - finish to remove ALWAYS_USE_MPI in source code that TAF does not see;
576      - no longer set ALWAYS_USE_MPI in Makefile (was done by genmake2).
577      - improve genmake2 checking for ALLOW_${PKG} in CPP_OPTIONS.h files (distinguish
578         upper/lower case ; account for space between "#" and undef/define)
579    o pkg/flt (with exch2):
580      - cleaning: fix so that it compiles; move remaining MPI calls out of flt_exch2.F;
581      - simplify threads synchronisation; fix (many issues) multi-threaded with MPI.
582    
583    checkpoint63s (2012/09/05)
584    o pkg/ecco:
585      - remove #ifdef ALLOW_SMOOTH_CORREL3D brackets.
586      - add more relevant #ifdef ALLOW_SMOOTH ones.
587      - sort out useAtmWind, useSMOOTH, ctrlSmoothCorrel2D.
588    o pkg/ctrl:
589      - CTRL_OPTIONS.h : document CPPs related to smoothing; ALLOW_SMOOTH_CORREL2D/3D,
590        ALLOW_CTRL_SMOOTH, ALLOW_SMOOTH_CTRL2D, ALLOW_SMOOTH_CTRL3D.
591      - ctrl.h : document run time params doInitXX, doMainPack, doMainUnpack, doPackDiag,
592        doSinglePrecTapelev (audodiff param!), ctrlSmoothCorrel2D (new) and
593        ctrlSmoothCorrel3D (new).
594        The added ctrlSmoothCorrel2D/3D replace the old ALLOW_SMOOTH_CORREL2D/3D CPP.
595      - ctrl_readparms.F : initialise ctrlSmoothCorrel2D/3D and read from namelist.
596      - ctrl_init.F ctrl_pack.F ctrl_unpack.F : switch off ustress/vstress
597        controls when useAtmWind, and vice versa.
598      - ctrl_map_ini_ecco.F : UVEL0, VVEL0, edtaux, edtauy cannot be smoothed as tracers.
599      - ctrl_get_gen.F : replace #ifdef ALLOW_SMOOTH_CORREL2D with
600          #ifdef ALLOW_SMOOTH, IF ctrlSmoothCorrel2D, IF useSMOOTH.
601      - ctrl_map_ini_gen.F : replace #ifdef ALLOW_SMOOTH_CORREL3D with
602          #ifdef ALLOW_SMOOTH, IF ctrlSmoothCorrel3D, IF useSMOOTH.
603      - ctrl_set_pack_xy[z].F, ctrl_set_unpack_xy[z].F:
604        replace ALLOW_SMOOTH_CORREL2D/3D brackets with ctrlSmoothCorrel2D/3D.
605    o pkg/smooth:
606      - remove un-necessary includes.
607      - remove ALLOW_SMOOTH*D and ALLOW_SMOOTH_CORREL*D brakets.
608        Those CPP options were never defined, and not necessary.
609    o model/src:
610      - fix CPP brackets in ini_mixing.F (GM_background_K belongs to gmredi).
611      - standard treatment of useSMOOTH.
612    o pkg/autodiff:
613      - add LOGICAL useGGL90inAdMode, useGGL90inFwdMode, useSALT_PLUMEinAdMode,
614        useSALT_PLUMEInFwdMode allowing to switch off ggl90 and salt_plume adjoint.
615    o pkg/exch2:
616      - add "if usingMPI" where it was missing (in exch2_rx?_cube*.template)
617        + start to remove ALWAYS_USE_MPI in source code that TAF does not see.
618      - make new S/R W2_MAP_PROCS out of w2_eeboot.F to setup exch2 CommonFlag
619        and tiles to process mapping.
620      - re-arrange 3 header files (W2_EXCH2_PARAMS.h, _BUFFER.h & _TOPOLOGY.h)
621        moving /EXCH2_FILLVAL_RX/ & /W2_EXCH2_COMMFLAG/ to W2_EXCH2_TOPOLOGY.h;
622        rename "exch2_tProc" to "W2_tileProc" and move seting of e2FillValue_RX
623        from w2_eeboot.F to w2_readparms.F.
624    o eesupp/src:
625      - set exchNeedsMemsync & exchUsesBarrier according to "usingMPI" (instead of
626        ALWAYS_USE_MPI) + moved from ini_communication_patterns.F to eeset_parms.F;
627        also move setting of exchCollectStatistics from exch_init.F to eeset_parms.F
628      - in eedie.F and all_proc_die.F, always call MPI_FINALIZE when ALLOW_USE_MPI
629        is defined (remove condition on usingMPI) to match cases where MPI_INIT
630        has been called.
631      - fix bug I put in previous modif of exch_sm_3d_rx.template (not much used);
632      - change default (non-MPI) value of myPid (from 1 to 0) to match MPI settings
633        (so that on 1 proc, get same myPid independently of usingMPI)
634      - add a stop if multi-procs but usingMPI=F ; stop also if usingMPI=T and
635        useCubedSphereExchange with EXCH-1 (safer).
636      - add "if usingMPI" where it was missing (+ start to remove ALWAYS_USE_MPI).
637    o pkg/ggl90:
638      - fix bug in filling corner mask array "mskCor" (FILL_CS_CORNER_TR_RL call)
639        used in ALLOW_GGL90_SMOOTH code.
640    o pkg/flt:
641      - fix typo in FLT_WITHOUT_Y_PERIODICITY (the effect was to ignore stopping
642        floats at the Southern end of the domain).
643    o eesupp/inc:
644      - add a list of CPP-options which can be set by Makefile (DEF_IN_MAKEFILE.h);
645        but not used (and not to be used) anywhere, just for documentation.
646    o pkg/autodiff, exf, ptracers & seaice (AD & TL output):
647      - comment out the very nasty "writeBinaryPrec = writeStatePrec" line, since:
648        a) can damage previously written records in any other multi-record files.
649        b) if needed, can easily do it cleanly, by calling S/R WRITE_REC_3D_RL/S.
650    o tools/genmake2:
651      - define variable MAKE within Makefile and use it in place of 'make';
652      - update AD_CONFIG.h (if needed) before building any of the executable
653        (forward, adjoint or tangent-lin); this involves a 2nd invocation of make;
654        and add the usual #ifndef/#define AD_CONFIG_H in AD_CONFIG.h;
655      - always print usual warning comment 'this file is automatically generated'
656        from script convert_cpp_cmd2defines (+ remove this warning from genmake2).
657    o pkg/cheapaml:
658      - updated to correspond to the code used in accepted paper (Nico Wienders).
659    o pkg/exf:
660        added run time switch useAtmWind to replace ALLOW_ATM_WIND cpp switch.
661        ALLOW_ATM_WIND now just sets the useAtmWind default (see exf_readparms.F)
662        and force defines ALLOW_BULKFORMULAE (EXF_OPTIONS.h).
663    o pkg/exf, autodiff, ctrl, ecco and seaice:
664        remove ALLOW_ATM_WIND brackets, or replace them with useAtmWind ones.
665    o pkg/ctrl, ecco:
666        allow to compile both ALLOW_U/VSTRESS_CONTROL and ALLOW_U/VWIND_CONTROL.
667        Depending on useAtmWind, one is inactive, and the other is active (see
668        exf_getffields.F/exf_getsurfacefluxes.F).
669    o tools/genmake2:
670      - improve error msg when failing in 2nd test of check_for_broken_Ff
671      - fix option '-makefile' short-name (-mf according to genmake2 -help)
672      - source local config file "genmake_local" just after processing the genmake2
673        command arguments (previously done before processing arg).
674    o pkg/grdchk:
675      - add a call to TURNOFF_MODEL_IO for Tangent-Linear run (in this case, call
676        to this routine from cost_final has been dropped in g_cost_final)
677      - improve printed information (more explicit msg, no longer using "print *,"
678         fix fcpertminus printed value).
679    o model/src:
680      - move call to COST_INIT_VARIA out of packages_init_variables.F directly
681        into initialise_varia.F (just after calling PACKAGES_INIT_VARIABLES):
682        this prevents getting cost-funct reset in adinitialise_varia recomputations.
683    o pkg/dic:
684      - move initialisation of "freefe" array from from dic_biotic_forcing.F to
685        fe_chem.F: this prevents TAF from dropping this initialisation in TLM code.
686    o pkg/grdchk:
687      - grdchk_main.F : added CALL GLOBAL_SUM_INT( ierr , myThid )
688      - grdchk_getadxx.F etc. : omit I/O if ierr.EQ.0
689    o pkg/autodiff/ctrl/grdchk :
690      - attempt to sort out what works and what does not,
691        with regard to I/O, and to warn/stop accordingly.
692    o pkg/grdchk:
693      - attempt to fix grdchk in the case of useSingleCpuIO.
694      - "if ( myProcId .EQ. grdchkwhichproc .AND. ierr .EQ. 0 )"
695       statements were moved from grdchk_main.F and into
696       grdchk_getadxx.F grdchk_getxx.F grdchk_setxx.F.
697      - a global sum is applied to record numbers icvrec/layer
698       out of grdchk_loc so that they be passed to I/O routines.
699    o pkg/smooth:
700      - fix recomputation that appeared with nlfs : use smooth_recip_hFacC,
701        smooth_hFacW, smooth_hFacS (copied at init_fixed) in 3d case.
702    o verification/testreport:
703      - add option '-tlm' for Tangent-Linear test (-adm,-oad,-tlm are all exclusive);
704      - can also use compressed (gzip) reference output file;
705      - change format (in pkg/grdchk) of TLM output (+ add forward gradient)
706        to be easier to collect by testreport.
707      - update existing TLM output (half out-of-date by more than 3 yrs).
708      - report NETCDF & LAPACK settings (from genmake2) in output dir.
709      - report run-time in each individual summary (previously only for AD test);
710        for TLM test, add also TAF version.
711      - add daily TLM test on (old) aces cluster + weekly test on baudelaire.
712    
713    checkpoint63r (2012/08/15)
714    o tools/genmake2:
715      - fix Makefile for target ftlall (+ update files to clean after make ftlall)
716    o pkg/ecco/ecco_cost_final.F :
717      - fix fc print statements (to stdout and costfunction0000) so
718        that the printed value is always after the global sum.
719    o pkg/seaice/seaice_dynsolver.F :
720      - fix ice strength assymptote at SEAICE_area_max<1
721        (no change for the standard case of SEAICE_area_max=1)
722    o some cleaning:
723      - pkg source files: ensure that all *.F files from each pkg included the
724        corresponding ${PKG}_OPTIONS.h file (except stand-alone src file which
725        only includes CPP_EEOPTIONS.h); fix S/R CTRL_SMOOTH ; update AD experiment
726        code_ad/*.F src files; add new option-file in pkg/admtlm + corresponding
727        includes;
728      - model/src: add PACKAGES_CONFIG.h wherever ALLOW_AUTODIFF[_TAMC] is used.
729      - ALLOW_DIFFKR_CONTROL: add a stop in S/R CTRL_CHECK in case ALLOW_3D_DIFFKR
730        is undef; also define /DYNVARS_DIFFKR/ common block in DYNVARS.h when
731        ALLOW_DIFFKR_CONTROL is defined, to allow to compile and reach this stop.
732      - update option-file CPP_OPTIONS.h of all AD experiments:
733        * no longer include PACKAGES_CONFIG.h ;
734        * includes ECCO_CPPOPTIONS.h if PACKAGES_CONFIG.h has been included ;
735        * def/undef ALLOW_3D_DIFFKR independently of ALLOW_DIFFKR_CONTROL (before
736          including ECCO_CPPOPTIONS.h).
737    o pkg/cost, pkg/ctrl, pkg/ecco option-file:
738      - clean-up and split content of old pkg/ecco/ECCO_CPPOPTIONS.h file into
739        separated pkg option-file (done according to old doc from ECCO_CPPOPTIONS.h,
740        not necessary accurate).
741      - add a template for option-file ECCO_CPPOPTIONS.h, mostly empty, in
742        pkg/autodiff, i.e., the 1rst pkg to compile for adjoint built, with lines to
743        deliberately break compilation (a remainder that it needs to be customized)
744      - in pkg/ecco, includes ECCO_OPTIONS.h instead of COST_OPTIONS.h
745      - rename COST_CPPOPTIONS.h to COST_OPTIONS.h
746      - rename CTRL_CPPOPTIONS.h to CTRL_OPTIONS.h
747    o tools/genamke2:
748      - check for lapack.
749    o pkg/cost and pkg/ecco : attempt to sort out some of the limiting intricacies.
750      - pkg/cost.cost_final.F : allow for use of pkg/ecco and pkg/cost cost functions
751        jointly. The exclusive ifdefs were removed, to add costs terms (when defined)
752        from both packages.
753      - the fc global sum in pkg/ecco/ecco_cost_final.F was removed accordingly.
754      - for objf_atl we use either the pkg/ecco or the pkg/cost term depending on CPPs.
755      - pkg/ecco and model/src : add CPP brackets around pkg/cost and pkg/ctrl includes
756        of "CTRL_SIZE.h" "ctrl.h" "ctrl_dummy.h" "optim.h" / "cost.h" accordingly.
757    o pkg/cost : add comments to explain special and/or untested setups.
758    o pkg/exf:
759      - use EXF_OPTIONS.h to set pkg/exf options except if done in ECCO_CPPOPTIONS.h
760        (previously, ALLOW_AUTODIFF_TAMC was controling this switch).
761    o verification/*/code_ad:
762      mimimal cleaning of AD experiments ECCO_CPPOPTIONS.h option-file:
763      - reccord when this file is included (define ECCO_CPPOPTIONS_H)
764      - remove the most obvious obsolete features (e.g., #define ALLOW_COST not
765        allowed since Oct 2003 in any option-file except in PACKAGES_CONFIG.h)
766    o pkg/seaice :
767      - added possibility to change ice strength/PRESS0 relationship to
768        HEFF, according to the following run time parameters
769        SEAICEpresPow0 :: HEFF exponent for ice strength below SEAICEpresH0 (integer, >0)
770        SEAICEpresPow1 :: HEFF exponent for ice strength above SEAICEpresH0 (integer, >0)
771        SEAICEpresH0   :: HEFF threshold for ice strength            (m)
772    o pkg/ggl90 :
773      - added run time flag mxlSurfFlag to include the code that ensure
774        mixing between first and second level (previously included as a comment)
775    o verification/1D_ocean_ice_column/input_ad/data.autodiff :
776      - add test of newly added dumpAdByRec=T option where
777        we write all records to one file per variable.
778    o verification/global_ocean.cs32x15/code_ad/CPP_OPTIONS.h :
779      - switch to #define ALLOW_BALANCE_RELAX and ALLOW_BALANCE_FLUXES
780        to check that this code is ok with taf and compiles in adjoint.
781    o pkg/autodiff :
782      - added run time param dumpAdByRec : ad dump format switch.
783        If true then write all records to one file per variable.
784        Else write one file per record (remains the default).
785      - revise seaice_ad_dump.F and exf_adjoint_snapshots_ad.F accordingly.
786    o pkg/seaice:
787     - Added SEAICEuseTILT run time switch : if set to
788       false then omit the tilt term in seaice dynamics.
789     - Fix free drift calculation.
790    o pkg/shelfice:
791      When initializing SHELFICEDragQuadratic, set default to be
792      consistent with shiCdrag in case SHELFICEuseGammaFrict is used,
793      but retain option to set it independently
794      (inconsistenty spotted by Veronique Dansereau)
795    o eesupp/inc:
796      - in EEPARAMS.h, add real-type constant for some frequently used simple number
797         (0,1,2,1/2), with name explicitly referring to RS/RL type.
798    o model/src:
799      - move balancing of relaxation terms to new S/R balance_relax.F.
800    o pkg/autodiff:
801      re-write active I/O high-level (control) S/R:
802      - rename  S/R ACTIVE_READ/WRITE_RL to ACTIVE_READ/WRITE_3D_RL
803      - add 1 more argument (useCurrentDir) to replace the "_LOC" 2nd set of S/R.
804      - use standard pkg/mdsio I/O routines (MDS_READ/WRITE_SEC_XZ/YZ  and
805        MDS_READ/WRITE_FIELD); change loops to multi-threads.
806      - update and merge active_file_control_slice.flow into active_file_control.flow
807      - update the calls in lower level S/R (active_file.F, active_file_g.F and
808        active_file_ad.F) keeping the argument list and function unchanged.
809      - also update lower-level "_LOC" version (call same S/R with "useCurrentDir
810        =.TRUE.") and remove high-level (control) _loc version (not called anymore).
811      - new low-level active I/O routines, one for each type (RL/RS), for active var
812        of various (XY,XZ,YZ) shape and level number (arguments: arrShape, myNr);
813        fix ctrl_init_wet.F & ecco_cost_weights.F by calling the new S/R with the
814        right type.
815    o autodiff and RS=real*4:
816      - call the right type (_RS instead of _RL) of S/R in few output S/R (pkg/exf
817        ad-monitor and snapshots); disable arrType='RS' in mdsio_gl*.F ;
818      - change argument type of 3-D mask argument to _RS to match type in the call
819        (in seaice_cost*.F, ctrl_*_gen.F and *ctrl_bound.F); to be continued.
820    o pkg/thsice:
821      - re-anable balanceEmPmR when useSEAICE=T with useThSIce=T.
822      - option to correct ocean fresh-water flux for imbalance of Atmos+Land
823        fresh-water flux: uniform correction or proportional to local precip.
824    o pkg/ctrl:
825      - new header file CTRL_SIZE.h for parameters maxCtrlArr2D, maxCtrlArr3D
826      - redefine CPP option ALLOW_BOTTOMDRAG_CONTROL to
827                            ALLOW_BOTTOMDRAG_CONTROL_NONGENERIC
828      - verification/hs94.1x64x5/ tests ALLOW_GENARR{2D,3D}_CONTROL
829    
830    checkpoint63q (2012/07/30)
831    o pkg/autodiff:
832      note about monitor and snap-shot of ad-variables:
833      a) need to apply ADEXCH before monitor or output of ad-vars to include
834       overlap contributions (was done for adjDump but missing for monitor).
835      b) since ADEXCH implies adding overlap values to interior array, machine
836       truncation error is expected when adding an ADEXCH call in the middle of
837       the time-stepping (although mathematically identical).
838      modifs:
839      - fix some incorrect type (RL/RS, UV/scalar) in ADEXCH calls and ad-vars
840        declaration (adEddyPsiX,adEddyPsiY in adcommon.h).
841      - add new run-time params (dumpAdVarExch & mon_AdVarExch) to select how  to
842        apply ADEXCH before monitor or snap-shot of ad-variables:
843           =0 : no ADEXCH ; =1 : do ADEXCH ; =2 : apply ADEXCH on a local copy.
844      - implement new method (copy+adexch) for snap-shot and monitor of main model
845        ad-vars (initially not used by default -> output unchanged).
846      - change default (set to 2) to use new method and update few output_adm.txt
847        with accurate ad-monitor (global_ocean.90x40x15, tutorial_global_oce_biogeo
848        and both tutorial_tracer_adjsens tests).
849      - switch 2 global_ocean.cs32x15 AD-tests to AB-2 (seaice_dynmix & thsice)
850        and turn off momDissip_In_AB in the 2 other (needed for stable AB-3).
851    o pkg/ctrl:
852      enable the use of a variable number (maxCtrlArr2D, maxCtrlArr3D) of
853      generic control variables via
854      #define ALLOW_GENARR2D_CONTROL and/or #define ALLOW_GENARR3D_CONTROL
855      Only required customization should be S/R ctrl_map_ini_genarr.F
856      (routine in repository contains example)
857    o pkg/exf:
858      - fix and refine checking of surface-relaxation setting when using EXF
859    o verification (adjoint exp):
860      - reduce length of simulation by half for experiment global_ocean.cs32x15
861        (std, seaice & seaice_dynmix) and exp tutorial_dic_adjoffline; update output.
862    o pkg/mom_common (mom_u/v_bottomdrag), pkg/shelfice (shelfice_u/v_drag)
863      - replace if statements KE.ne.0 with KE.gt.0 to avoid sqrt of negative numbers
864        of KE that can occur with aggressive optimization
865      + put quadratic bottom drag calculation in separated loops (only done if
866        using bottomDragQuadratic)
867    o model/src: CG2D_NSA
868      - clean-up:  stop if cg2dNormaliseRHS=T and AUTODIFF
869         and replace GLOBAL_SUM calls with GLOBAL_SUM_TILE.
870      - in test-exp that uses CG2D_NSA (bottom_ctrl & tutorial_tracer_adjsens),
871         change cg2d residual target to be expressed in Wunits (=> do not normalise
872         RHS ; this fix global_max Pb with TAF); update output.
873    o verification/tutorial_tracer_adjsens:
874       improve parameter consistency (and get rid of warnings):
875       - use deltaTFreeSurf=deltaTtracer (better with NonLin FreeSurf);
876       - switch Temp Adv Scheme from 81 to 80 (no limiter since theta < 0 is physical)
877       - use staggerTimeStep (for stability) in som81; use default rotation period.
878    o pkg/exch2:
879      - with empty facet: fix compact-format (W2_mapIO=1) definition (was previously
880        reset to 0 = 1 long line in X)
881    o pkg/mdsio:
882      - fix reading of dimensions from meta file for large-size domain
883    o model/src:
884      - fix saltIsActiveTr setting for IdealGas eosType (eosType is 6 character long);
885      - to refine CS-grid check, add logical flag "hasWetCSCorners": true if using
886        Cubed-Sphere Exch with CS-corners inside the domain;
887        make new S/R INI_GLOBAL_DOMAIN from code in ini_linear_phisurf.F to calculate
888        globalArea and to set hasWetCSCorners.
889      - add warning if usingCurvilinearGrid and momAdvection in flux-form (missing
890        metric terms); stop if hasWetCSCorners=T and momAdvection in flux-form.
891      - re-activate the stop if useCDscheme and hasWetCSCorners=T (previously if
892        useCDscheme and useCubedSphereExchange).
893    o pkg/seaice/seaice_growth.F :
894      - compute the SEAICE_DISABLE_HEATCONSFIX term accordingly
895        for the (.NOT.useRealFreshWaterFlux).OR.(nonlinFreeSurf.EQ.0)
896        when the previous code was not correct.
897      - in all cases diagnoze the boundary condition mismatch to SIaaflux
898      - in the case of useRealFreshWaterFlux.AND.(nonlinFreeSurf.GT.0) add
899        that term to QNET (essentially to set the melt/freeze water to 0degC).
900        when SEAICEheatConsFix is true, so that the ocean+ice budget heat is closed.
901    o verification/global_ocean.cs32x15/input.seaice :
902      - add SEAICEheatConsFix in data.seaice, ensuring closed ocean+ice heat budget.
903      - add diagnostics (commented out) for budget test using my matlab codes (gcmfaces).
904      - update results (output.seaice.txt) accordingly.
905    o verification/lab_sea/input/data.seaice :
906      - remove SEAICEheatConsFix, which is now be tested
907        in global_ocean.cs32x15. The presently coded fix
908        is only consistent with real fresh water + nlfs.
909      - update results (output.txt) accordingly.
910    o pkg/salt_plume: added diagnotic for salt tendency (oceSPtnd).
911    o AD_CONFIG.h file:
912      - in genmake2: remove "#undef ALLOW_ECCO_OPTIMIZATION" from AD_CONFIG.h;
913      - remove #include "AD_CONFIG.h" from all included OPTIONS files and
914        add it explicitly in each fortran src file where it is needed.
915        motivation: header file AD_CONFIG.h is generated/modified after "make depend"
916        thus introducing potentially wrong dependency; therefore, better to include
917        it only where it's really needed, and after any other included OPTIONS file
918        (less tempting to bring conditional includes according to ALLOW_ADJOINT_RUN
919        or ALLOW_TANGENTLINEAR_RUN).
920    
921    checkpoint63p (2012/07/06)
922    o pkg/autodiff:
923      - rename S/R INI_AUTODIFF to AUTODIFF_INIT_VARIA ;
924      - create new header file "AUTODIFF_PARAMS.h" for pkg/autodiff parameters
925        which are now read from new parameter file "data.autodiff" (inAdExact
926        previously in "data", use{KPP/GMRedi/SEAICE}inAdMode previously in data.pkg)
927      - add file "data.autodiff" in all verification/*/input_ad/ directories.
928      - add run-time parameter to turn On/Off SEAICEuseFREEDRIFT in adjoint/forward
929        mode (used in global_ocean.cs32x15.seaice_dynmix test exp.)
930    o verification/tutorial_tracer_adjsens/
931      - add extra sub-verification which uses "SOM" advection scheme
932        (2nd Order-Moment Advection Scheme, Prather Limiter) with
933          #define GAD_ALLOW_TS_SOM_ADV in GAD_OPTIONS.h
934        and in data:
935          multiDimAdvection=.TRUE.,
936          tempAdvScheme=81,
937          saltAdvScheme=81,
938    o model/src:
939      - introduce ALLOW_BALANCE_RELAX which allow the removal
940       of the global mean of relaxation terms by setting
941       balanceThetaClimRelax and balanceSaltClimRelax
942      - disable balanceEmPmR and balanceQnet in the case when useSeaice.
943       This case is now treated appropriately in seaice_growth.F
944    o pkg/seaice:
945      - do balanceEmPmR and balanceQnet based on the net fluxes
946        (SItflux) that enter the ocean+ice system rather than QNET
947        and EMPMR. Works best in real fresh water.
948      - SIatmFW, SIatmQnet, and SItflux computations had to be moved
949        out of the diagnotics bloc, and stored in global arrays.
950    
951    checkpoint63o (2012/06/29)
952    o vertical mixing schemes:
953      - remove unused S/R CALC_BUOYANCY (left from branch-atmos merging)
954      - replace computation of density (in Function STATE1, opps_calc.F) by a call
955        to S/R FIND_RHO_SCALAR
956      - pass sigmaR to S/R PP81_CALC, MY82_CALC (but not yet used) and to GGL90_CALC
957        and use it for N^2 calculation in ggl90_calc.F (save 2 density computations);
958        affects output (vermix.ggl90) at truncation level.
959    o testreport:
960      - change adjustment of SIZE.h for mpi+mth testing: preserve enough tiles
961        (nSx,nSy) for the number of threads (from eedata.mth)
962    o model/src:
963      - remove 2nd set of calls at the top of initialise_varia.F (Adjoint part)
964        related to Non_Lin Free-Surf or Bottom-Control (but not longer necessary).
965    o verification/tutorial_tracer_adjsens/
966      - compile with ALLOW_CG2D_NSA
967      - run with nonlinFreeSurf=3
968      - update reference output_adm.txt
969    o tools/genmake2:
970      - add "-DHAVE_NETCDF" to the DEFINES list when NetCDF is available ;
971        refine usePROFILES switching off (only when NetCDF is not available).
972    o verification (atmospheric set-up):
973      - change eosType='IDEALGAS' to eosType='IDEALG' to match variable declaration
974    o pkg/profiles : refine profiles and files handling.
975    o model/src and pkg/ecco : introduce run-time switch usePROFILES.
976    o model/src/the_main_loop.F, forward_step.F and pkg/exf/EXF_OPTIONS.h :
977      - changes to use model/src/the_main_loop.F rather than the ecco version
978        in ecco type adjoint runs.
979    o model/src:
980      - move computation of recip of grid distance & area from INI_MASKS_ETC to INI_GRID
981      - move setting of h0Fac[C,W,S] from INI_LINEAR_PHISURF to INI_MASKS_ETC
982      - update_masks_etc.F: rename SMOOTH*_R4,R8 function to the corresponding type (RS,RL)
983    o model/src:
984      - fix S/R UPDATE_CG2D for ALLOW_DEPTH_CONTROL case (was empty before);
985        update output of test experiment bottom_ctrl_5x5.
986    o pkg/generic_advdiff:
987      - implement vertical bi-harmonic diffusion (for now, only for T & S and
988        only explicitly).
989    o verification/bottom_ctrl_5x5/
990      update reference output (results changed quite some time ago,
991      not sure when; but new reference results look ok in terms of grdchk)
992    o verification/1D_ocean_ice_column/
993      For verification purposes, the exact adjoint rather than an approx.
994      should be used (e.g., to comare against F.D. or TLM).
995      removed autodiff_inadmode*_ad.F routines in code_ad/
996      Update results/ accordingly.
997    o pkg/cal:
998      - change cal_getdate.F so that output date is function of input time only
999        (less ambiguous, not mixed up with input iteration number).
1000      - fix calendarDumps for non-zero phase-lag (S/R CAL_TIME2DUMP).
1001    o pkg/diagnostics:
1002      - implement calendarDumps also for stats-diags
1003      - implement calendarDumps also for snap-shot output (negative freq)
1004      - for now, ignores calendarDumps if non-zero phase-lag.
1005    
1006    checkpoint63n (2012/06/04)
1007    o model/src:
1008      - recompute rSurfW & S to ensure consistent column thickness (needed for rStar)
1009        between Sum_k(hFac*drF) and rSurf-rLow, for now only when using pkg/shelfice;
1010      - use h0FacC, W & S to compute hFac_surfC, W & S in calc_surf_dr.F (more
1011        similar to calc_r_star.F); update results of experiment internal_wave and
1012        tutorial_global_oce_in_p (affected @ truncation level).
1013    o pkg/shelfice:
1014      - add parameterisation of advective-diffusive flux into the ice shelf
1015        according to Holland and Jenkins (1999), eq.22-33, as suggested by Jan De Ryd
1016      - simply eps3/3a computation
1017    o eesupp:
1018     - add new CPP option (DISCONNECTED_TILES) to disconnect tiles (no exchange
1019       between tiles, just fill-in edges assuming locally periodic subdomain) and
1020       add corresponding exchange subroutines (EXCH0);
1021     - new CG-solver version (_EX0) for disconnected-tiles special case.
1022    o model/src (CG-solvers):
1023     - modify Single-Reduction version (CG2D_SR) in case cg2dMaxIters is reached
1024       (similar final residual output and max-Iter number as with standard version);
1025     - allows to store and use lowest-residual solution (standard & _SR versions);
1026     - cleaning up (remove old, commented out code, LETS_MAKE_JAM ...).
1027     - by default, also compile CG2D_SR version (define ALLOW_SRCG in CPP_OPTIONS.h)
1028    o eesup/src:
1029     - global_vec_sum.F cleaning: add a BARRIER ; update comments ; remove ndef
1030       ALWAYS_USE_MPI (no longer needed after fixing usingMPI settings - March 2012)
1031    o pkg/salt_plume added to lab_sea/input_ad.noseaicedyn
1032    
1033    checkpoint63m (2012/04/27)
1034    o pkg/shelfice:
1035     - account for partical cells in surface level below ice-shelf for hydrostatic
1036       pressure calculion (set uniformFreeSurfLev to F); update isomip experiments.
1037    o ad test experiments:
1038     - update and rename to "ad_optfile.local" local AD-optfile specific to a
1039       particular adjoint verification experiment (in verification/*/code_ad/)
1040    o pkg/seaice & pkg/exf:
1041     - Part two of ECCO-CLIVAR code merges.
1042       Completes merge of seaice area relax. code.
1043       Requires unified CPP option EXF_ALLOW_SEAICE_RELAX
1044       to be set in EXF_OPTIONS.h since this pkg controls its I/O
1045       (and avoids second CPP option in SEAICE_OPTIONS.h)
1046     - change default value of costIceStart & costIceEnd to a valid date.
1047     - add snowPrecip to HSNOW in seaice_growth
1048    o pkg/ptracers:
1049     - move ptracers summary and setup check into separated S/R ; add a check for
1050       valid PTRACERS_Iter0 value (error+stop or just warning).
1051    o pkg/cal (+ pkg/ecco):
1052     - avoid calling a S/R with 2 times the same arg (FWD: unless both are only used
1053       as input; and for AD, unless both are not differentiable (e.g., k index)).
1054    o model/src:
1055     - define internal flag "uniformFreeSurfLev" (=T when free-surface level-index
1056       is everywhere k=1) to speed-up some calculations (by pass kSurf reference);
1057       temporary set to usingZCoords value (to be changed to F when using shelfice).
1058     - hydrostatic pressure: implement partial cell near the surface also for
1059       Z-coordinates (for the case where uniformFreeSurfLev=F); replace test on
1060       usingZCoords with test on uniformFreeSurfLev where needed (in NonHyd code).
1061    o pkg/ctrl/ctrl_init.F:
1062     - add a formal parameter to s/r ctrl_init_rec to print
1063       xx_$(ctrl_valiable)_file for easier debugging
1064     - move call of cal_* routines into the if-block where they are really
1065       needed so that xx_$(ctrl_variable)_period can be 0 or -12 without having
1066       to specify a startdate
1067    o pkg/seaice:
1068     - update comments in SEAICE_OPTIONS.h (+ similar update of lab_sea/code and
1069       global_ocean.cs32x15/code versions).
1070     - turn on seaice Multi-category (in data.seaice, SEAICE_multDim=7) for
1071       verification experiment global_ocean.cs32x15.seaice and update results.
1072    o pkg/exf:
1073     - new S/R EXF_GETFIELD_START to return starting-time of a forcing field
1074       (according to useExfYearlyFields).
1075    o pkg/cal:
1076     - move calendar setting & summary (previously in cal_readparams.F) into new
1077       S/R CAL_INIT_FIXED to be called later in the initialisation process, once
1078       length of the simulation is set (after SET_PARMS call); This is an attempt
1079       to fix Pb when, e.g.: pkg/longstep, modifies the length of the run.
1080     - For safety: keep a record of pkg/cal parameter settings status
1081               to allow to STOP if one pkg/cal S/R is called too early.
1082     - add a stop in all basic pkg/cal subroutines if called before setting is done.
1083     - modify cal_getdate.F: stop when nothing was returned;
1084       if called with myIter=-1, simply retrun modelBaseDate (1,2 = startDate_1,_2);
1085       this allows to remove "cal.h" from seaice_read_parms.F & init_mnc_vars.F.
1086    
1087    checkpoint63l (2012/04/04)
1088    o pkg/bbl:
1089      - fix call to FIND_RHO_2D in bbl_calc_rho.F (case multi-tiles per proc);
1090        update global_with_exf output.yearly.txt file.
1091    o pkg/cal:
1092      - start to clean-up cal_set.F ; fix for the case where baseTime is non-zero.
1093      - remove 2 unsused and very short (1 line only) functions ;
1094      - remove unsused subroutines from AD-Diff list.
1095    o model/src:
1096      - start to implement clean wait to stop in initialization S/R (config_check.F,
1097         packages_check.F, ini_parms.F and pkg/obcs/obcs_check.F + pkg/mypackage)
1098    o folowing PRINT_MESSAGE changes:
1099      - remove reminder multiple print to the same file (STDOUT) when multi-threads.
1100    o pkg/bbl:
1101      - modification so it can work with z*
1102      - replace deltaT with dTtracerLev(k) for asynchronous time stepping
1103      - global_with_exf/input.yearly verification; changes output.yearly.txt
1104    o eesupp/src:
1105      - PRINT_MESSAGE: use OpenMP critical instruction (similar to PRINT_ERROR);
1106        writing to unit 0 (if unit=errorMessageUnit) extended to the case myThid=1
1107      - CHECK_THREADS: specific code if using OpenMP threading: improve checking of
1108        # of threads across processors (e.g., different env OMP_NUM_THREADS setting)
1109      - improve special preliminary call to EESET_PARMS (if eedata is read 2 times).
1110      - when using MPI, always set usingMPI=T ; set default accordingly and stop
1111        if not consistent.
1112      - ALL_PROC_DIE: add a BARRIER after MPI_FINALIZE call ; skip this when thread
1113        argument is zero (in case called within single-thread section).
1114    o pkg/fizhi:
1115        clean-up turbulence cold-start switch: decided in fizhi_init_vars.F, stored
1116        in common bloc (fizhi_coms.h) and then passed as argument up to S/R TURBIO.
1117    o pkg/exch2:
1118      - add argument "updateCorners" to S/R exch2_get_uv_bounds (enable to
1119        activate EXCH_IGNORE_CORNERS in vector EXCH S/R).
1120      - switch 1rst EXCH call to IGNORE_CORNERS (instead of UPDATE_CORNERS)
1121        but keep the 2nd with UPDATE_CORNERS: this prevents overwriting good data
1122        with bad ones coming from a not-yet-updated halo.
1123        This should fix the problem when sNx <> sNy and GCD(sNx,sNy) < 2*Olx.
1124    o pkg/frazil:
1125        move FrzForcT diag from frazil_diagnostics_state.F to frazil_calc_rhs.F
1126        http://mitgcm.org/pipermail/mitgcm-devel/2012-March/005384.html
1127    o model/src/config_check.F: add a check for OLx>sNx/OLy>sNy
1128    o verification/lab_sea
1129      * #undef SEAICE_EXCLUDE_FOR_EXACT_AD_TESTING
1130      * #define ALLOW_SST_CONTROL & ALLOW_SST_CONTROL
1131      * nTimeSteps 3 -> 4
1132      * changed reference output accordingly
1133    o pkg/ctrl:
1134      * fix ctrl_get_gen for xx_sst, xx_sss
1135    o pkg/fizhi:
1136      - fix 2 calls to S/R GRD2MSC (argument igrd) in update_earth_exports.F
1137        update results of exp. fizhi-cs-32x32x40 (fail with only 6 digits for cg2d)
1138      - by default, use new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE);
1139        fix few out-of-bounds indices in referencing vars (initialise igrd to 1);
1140        clean-up fizhi_turb.F (remove unused & uninitialised qdiaglsm array).
1141    o pkg/gmredi:
1142      - add diagnostic of Redi (main diagnonal) vertical diffusive flux of Temp
1143    o pkg/fizhi:
1144      - fix few initialisation and multi-tile Pb: aqualev & gridalt now pass the
1145        (old)aces open64 tuv test.
1146    o pkg/icefront: fix bug and reorder loop in icefront_init_varia.F
1147    o pkg/mom_vecinv:
1148      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
1149        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
1150        with non-lin free-surf).
1151    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
1152      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
1153      some compilers (gfortran 4.6.0 on MacOS)
1154    o momentum:
1155      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
1156        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
1157        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
1158    
1159    checkpoint63k (2012/03/17)
1160    o model/src:
1161       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
1162         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
1163       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
1164         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
1165    o model/src: solve_*diagonal.F
1166       - replace division with multiplication by inverse (similar to original version)
1167         update output of AD exp. global_ocean.90x40x15.
1168       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
1169         to enable the use of the vectorized & differentiable solve_tridiagonal.F
1170       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
1171         vertical advection (to get solve_tridiagonal tested in AD mode).
1172    o pkg/seaice: ECCO-CLIVAR merge:
1173      1. seaice AREA relaxation
1174         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
1175         * runtime flag: SEAICE_tauAreaObsRelax
1176      2. modified global mean cost imbalance code: CPP option
1177          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
1178    o another iteration on solve_*diagonal.F
1179       Make choices independent of AUTODIFF
1180       Default will be the adjoinable vectorized version.
1181       Alternative choices are:
1182       * non-adjoinable original version with low memory footprint:
1183         #define SOLVE_DIAGONAL_LOWMEMORY
1184       * still adjoinable but does not vectorize (k as inner-most loop):
1185         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
1186    o testreport
1187     - add option to use a home made wrapper around "make"
1188     - remove MITGCM_IEEE env. variable (no longer active)
1189    o pkg/shelfice
1190     - improve computation of friction velocity for velocity dependent
1191       exchange coefficients: include velocities into SHELFICEBoundaryLayer
1192       block to average velocities vertically
1193     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
1194    o Modify diagonal solvers, now three versions (upon request):
1195      #ifndef SOLVE_DIAGONAL_AUTODIFF
1196        1. default version (dating back a while ago)
1197      #else /* def SOLVE_DIAGONAL_AUTODIFF */
1198      # ifdef SOLVE_DIAGONAL_KINNER
1199        2. adjoinable version with k-innermost loop (G. Forget)
1200      # else
1201        3. adjoinable vectorized version of 2.
1202      # endif
1203      #endif /* SOLVE_DIAGONAL_AUTODIFF */
1204      All flags are currently set within routines, but could/should be moved to CPP-options.
1205      Array bounds for 1. are as before, for 2.,3. cover the entire domain
1206      (could be changed for 1. too).
1207    o verification/lab_sea (fwd):
1208      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
1209        use 7 categories (except hb87), new solve4temp params (except salt_plume),
1210        constant salinity (=4) or variable salinity (salt_plume) done through
1211        SItracer.
1212    o pkg/seaice:
1213      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
1214      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
1215         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
1216        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
1217        SEAICE_freeze got retired) but already better than previously with
1218        SEAICE_freeze=123456.7 deg.C;
1219      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
1220        (safer multi-threaded setting); always set SEAICEuseEVP;
1221      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
1222        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
1223        stop if multiple specifications for the same coeff; make sure default
1224        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
1225    o pkg/obcs:
1226      - allow to switch to upwind 1rst order advection scheme for the advective
1227        flux computation at the open-boundary; disabled for adjoint built.
1228    o pkg/ptracers:
1229      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
1230      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
1231      - add parameter to decide when to start a tracer; use internal flag to
1232        know which tracer to step-forward; switch this internal flag at the top
1233        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
1234        for adjoint built.
1235    o pkg/seaice:
1236      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
1237      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
1238      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
1239    o pkg/ecco:
1240      - fix writing of output file DiagnosCost_ClimSalt/Theta
1241        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
1242    o pkg/seaice:
1243      - add missing initialisation of COR_ICE array in dynsolver.F
1244      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
1245        compiled either way, and is tested in all exps (multidim was only tested
1246        in lab_sea ad before).
1247      - cosmetic change to prepare for future addition of ITD. no change to results.
1248        no defaults change.
1249      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
1250      - by lack of adequate verification experiments, I further used custom versions
1251        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
1252        should be correct.
1253      - avoid recomputations in ad.
1254    o array initialisation in adjoint mode:
1255      1) pkg/mom_common/mom_calc_ke.F:
1256        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
1257        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
1258        part this initialisation is gone, resulting in Floating Point Exception
1259        (caught by open64 compiler with debug option).
1260      2) model/src/convective_weights.F
1261        set output convectCount over the full array range (instead of doing
1262        an update): this fix a similar issue when called within recomputation (adjoint)
1263        which could by-pass the initialisation (normally done in the caller S/R).
1264    o pkg/seaice:
1265      - final version of turbulent flux params, as agreed at MIT ice meet:
1266           SEAICE_mcPheePiston (default is ~ 0.000875)
1267           SEAICE_mcPheeTaper (default is 0.)
1268           SEAICE_frazilFrac (defualt is 1.)
1269           SEAICE_mcPheeStepFunc (default is false)
1270      - changes results at trunction error level
1271      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
1272    o added pkg/frazil:
1273      - see frazil_description.tex for details
1274      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
1275  o pkg/shelfice/shelfice_thermodynamics.F  o pkg/shelfice/shelfice_thermodynamics.F
1276    - fix exponents for velocity dependent exchange coefficients: change    - fix exponents for velocity dependent exchange coefficients: change
1277      from 2/3(=0) to 0.66666666666666667      from 2/3(=0) to 0.66666666666666667
1278    - move computation of velocity dependent exchange coefficients into    - move computation of velocity dependent exchange coefficients into
1279      separate loop, so that it applies to both thermodynamics      separate loop, so that it applies to both thermodynamics
1280    - move some divisions by constants out of loops    - move some divisions by constants out of loops
1281    

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