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revision 1.1747 by jmc, Tue Oct 9 19:49:46 2012 UTC revision 1.1861 by jmc, Wed May 1 18:09:44 2013 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    checkpoint64g (2013/05/01)
8    o pkg/exf ALLOW_RUNOFTEMP
9      - if defined,  river and glacier runoff temperature can be read-in from
10        runoftempfile; runoftempfile needs to have same format as runofffile
11    o pkg/thsice (& pkg/bulk_force):
12      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
13        for energy content of Precip + RunOff & Evap (like with pkg/exf).
14      - change computation domain to always be the interior (without overlap).
15      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
16    o verification/tutorial_global_oce_biogeo:
17      - add preliminary OpenAD setup (still has problems)
18    o pkg/seaice:
19      - turn some parameters for choosing the convergence criterion of
20        the inexact Newton method (JFNK) into runtime parameters for convenience
21      - clean up seaice_calc_viscosities.F: remove/retire two options for
22        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
23        the results of lab_sea/input because a division has been replaced by
24        a multiplication with the reciprocal (sumNorm)
25      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
26        convergence of solver (changes results, of course), and to test some
27        new features
28    o model/src:
29      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
30      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
31      - move forcing adjustment (balancing surface forcing) in specific S/R
32        where might also be applied exchanges (if needed) to forcing arrays.
33    o pkg/shelfice:
34      - allow to specify the Ice-Shelf mass per unit area (instead of
35        shelficeLoadAnomaly) and do the conversion from one to the other
36      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
37        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
38        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
39        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
40      - update isomip experiment forward output (get machine truncation error
41        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
42    o verification/offline_exf_seaice:
43      revise data.seaice in input.thermo and input_ad and update results accordingly
44        HO = 0.2, SEAICE_areaLossFormula = 2,
45        SEAICE_growMeltByConv = .TRUE.,
46        SEAICE_doOpenWaterMelt = .TRUE.,
47      Improve consistency with input.thsice and fix the spurious 500m ice corners
48    o verification/global_ocean.cs32x15:
49      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
50        in icedyn (thsice+seaice-dyn) test and update output.
51    o verification/offline_exf_seaice:
52      - adjust list of tested variables (with testreport) and update
53        standard test output with better slection of monitored fields.
54    o pkg/cd_code:
55      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
56        experiment lab_sea.hb87
57    o tools/genmake2:
58      - change default makedepend from the system default to tools/xmakedepend:
59        When no makedepend is specified, select tools/xmakedepend it the test pass,
60        otherwise select the system default (if exist and pass the test) or
61        try to build cyrus-makedepend ; stop if none of the 3 works.
62    o pkg/exf & pkg/thsice:
63      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
64        for energy content of Precip + RunOff & Evap. Assumes:
65       1) Rain has same temp as Air.
66       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
67       3) Run-Off comes at the temp of surface water (with same Cp)
68       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
69        put directly into Latent Heat flux & should use water-vapor heat capacity.
70       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
71        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
72    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
73        (compile when SEAICE_ALLOW_JFNK is defined)
74    o pkg/thsice:
75      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
76        implementation): move THSICE_AVE call after the advection (called directly
77        from thsice_do_advect.F).
78    o verification/global_ocean.90x40x15 and OpenAD:
79      New experiment for OpenAD is identical to the one in input_ad except that
80        multiDimAdvection=.FALSE.,
81      There is still an issue with this.
82    o pkg/thsice:
83      - account for ice velocity (ocean relative velocity) in turbulent heat flux
84        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
85        and offline_exf_seaice (main test).
86    
87    checkpoint64f (2013/03/31)
88    o verification/OpenAD:
89      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
90    o verification/isomip, pkg/shelfice and OpenAD:
91      - add OpenAD setup to this exp and make shelfice package work with OpenAD
92    o verification/tutorial_global_oce_biogeo:
93      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
94    o verification/offline_exf_seaice:
95      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
96    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
97      - add OpenAD setup to this exp and make ptracers package work with OpenAD
98    o pkg/seaice/seaice_evp.F:
99       mask the asymmetric contribution of the ice-ocean stress (when
100       the turningAngle is non-zero) over open water to avoid stripes
101       in the EVP-solutions after many EVP-substeps. This does not change
102       the verification experiment (because turningAngle=0 in that experiment),
103       but will affect other EVP solutions with turningAngle.ne.0
104    o verification, AD & TLM output:
105      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
106        additions and multiplications which affect results at machine truncation
107        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
108        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
109        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
110        digits of matching.
111    o pkg/seaice:
112       modify lsr-algorithm so that it vectorizes AND converges by using a
113       "zebra" method: split vector loop into two with step size 2; this
114       solves a general convergence problem for the JFNK solver on a vector
115       computer. It has the potential to even improve convergence for
116       non-vector machines, but it does change the results so it is turned
117       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
118       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
119    
120    checkpoint64e (2013/03/05)
121    o pkg/ecco and several verification experiments:
122       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
123       from ecco package, and revert to unified routine in model/src/
124       Adjust verification experiments accordingly, especially gloal_oce_llc90
125       Should conclude long-standing work by Gael to reconsile the_main_loop with
126       ECCO and will enable OpenAD's revolve loop in ECCO setup.
127    o pkg/generic_advdiff:
128      - implement compressible flow method for multi-dim advection (similar to
129        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
130        TAF generates many recomputations) to use it; no yet coded with implicit
131        vertical advection.
132      - change experiment advect_cs (new output) and advect_xy (same output)
133        to test compressible flow multi-dim advection.
134    o pkg/generic_advdiff:
135      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
136        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
137    o pkg/seaice:
138      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
139        bug affects two verification experiments (lab_sea and lab_sea.hb87),
140        recover old (wrong) results by setting noSlipFac = 2. in
141        seaice_calc_strainrates.F;
142      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
143      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
144        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
145      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
146    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
147      - new subroutines seaice_lsr_tridiagu/v
148      - introduce loop bounds i/jmin/max to be able to use a restricted
149        additive Schwarz method, but not used for now.
150      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
151      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
152    o OpenAD support
153       Reorganize S/R call for overall time-stepping loop to facilitate
154       OpenAD revolve loop replacement
155       (new S/R main_do_loop.F)
156    o model/src:
157      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
158      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
159        ADAMS_BASHFORTH2.
160    o pkg/cheapaml:
161      - add new parameter (default=F, same as before) to disable full domain
162        (including land) periodicity in X & Y dir.
163      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
164        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
165        into single S/R CHEAPAML_TIMESTEP.
166    
167    checkpoint64d (2013/02/17)
168    o pkg/monitor (angular momentum):
169      - do not add Eta contribution to the total AM if using rigid-lid;
170      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
171      - horizontal discretisation: compute Zonal wind contribution separately for
172        each component (instead of from cell centered averaged) and use the 4
173        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
174      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
175        FreeSurf) if using vectorInvariant momentum.
176    o model/src (horizontal grid):
177      - move initialisation of all horizontal grid arrays to null value
178        from specific horizontal grid S/R to main S/R INI_GRID;
179      - add 2 new arrays to project model C-grid velocity on to zonal direction
180        (similar to AngleCosC & -AngleSinC but at U and V point location) and
181        compute them in S/R CALC_GRID_ANGLES.
182    o pkg/seaice: replace a hard coded parameter by a runtime parameter
183        SEAICE_JFNK_tolIter
184    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
185        preconditioner for JFNK (run LSR into the overlaps as far as possible,
186        i.e OLx/y-2, but overwrite the solution in the overlaps)
187      - extend loop range in seaice_calc_viscosity
188      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
189      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
190      - slightly modify loops in tridiagonal solver lsr-preconditioner
191      - by default remove the extra exchange in seaice_preconditioner with a
192        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
193      - modify offline_exf_seaice so that old results without RAS are reproduced
194        for output.dyn_jfnk.txt
195      in seaice_fgmres.F (unrelated to RAS)
196      - add a cpp-flag option for a re-ordered mapping (potentially more
197        efficient), but because this changes the results, turn it off by
198        default
199      - replace the save statement by local common blocks
200    o utils/matlab:
201      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
202      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
203        instead of local script "load_cs.m".
204    o pkg/seaice:
205      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
206        to the scalarProductMetric and the unrolling. By chance this does not
207        change the verification experiment, because of the particular domain
208        decomposition
209    o pkg/diagnostics:
210      - change default missing_value from UNSET_RL to -999.
211    o pkg/layers: improve vectorization of layers_fluxcalc.F
212      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
213        time spent in this routine by more than a factor of 3 on an NEC-SX8
214      - step 2: replace search algorithm by a bisection algorithm found in
215        Press et al. Numerical Recipes in Fortran. This algorithm can be
216        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
217        For now, use this algorithm only for TARGET_NEC_SX defined.
218      - moved the search algorithm into a separate subroutine, that is kept
219        within the same file for automatic inlining.
220      - modified catching potential errors
221    o pkg/ecco:
222      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
223    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
224      - modifications for ALLOW_GENTIM2D_CONTROL
225      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
226      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
227      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
228      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
229    o model/src:
230      - account for moist thermodynamics in (dry) potential temperature equation;
231        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
232        and cpl_aim+ocn.
233      - also switch to standard compiler (gfortran, was using ifort previously)
234        for fizhi-cs experiments reference output.
235    o pkg/ctrl:
236      - 1st step toward generic time-varying control variable (2D) via CPP option
237        ALLOW_GENTIM2D_CONTROL
238      - note new namelist ctrl_nml_genarr in data.ctrl
239    o verification/global_ocean.cs32x15:
240      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
241        thsice calling sequence and update "output.icedyn.txt" output file.
242    o pkg/ptracers:
243      - from Ryan A.: code to allow to restart a tracer at regular time interval
244        specifying a reset frequency and a reset-phase (for each tracers).
245    o pkg/thsice:
246      - implement new sequence of calls for thsice+seaice:
247          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
248          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
249      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
250        in CPP_OPTIONS.h) to recover old sequence;
251      - update diagnostics for Intermediate State thsice diagnostics: now filled
252        just before advection (instead of just after advection in old sequence);
253      - update output of experiment offline_exf_seaice (standard test);
254      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
255        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
256    o pkg/aim_v23:
257      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
258      - use standard pkg/mdsio routines to read & write CO2 pickup file;
259      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
260      - Implement new sequence of calls for seaice advection (with thsice and
261        seaice diffusion): do ice advection after ice-Thermodynamic (previously
262        was done before); change aim_do_physics.F (split the bi,bj loops block);
263      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
264    o pkg/thsice:
265      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
266        where just seaice diffusion is used without seaice-dynamics.
267    
268    checkpoint64c (2013/01/18)
269    o pkg/seaice:
270      - add a parameter JFNKres_tFac that can replace JFNKres_t
271        (= JFNKres_tFac*JFNKresidual before JFNK solver)
272      - add a line search option to the JFNK solver
273      - move update of u/vIce and computation of initial residual into a separate
274        routine (same file); makes the code a little easier to read (?)
275      - the line search requires computation of the residual and for some reason
276        I cannot do the update of u/vIce at the beginning of the Newton loop
277        without changing the results, so we move computation of the new residual
278        also to the end of the Newton loop, even without the line search
279    o pkg/mdsio:
280      - write missing value (corresponding to undefined array value) to meta files;
281        skip this if missing value is one (UNSET_RL would be a better value for the
282        case of undefined missing value but it's current the default missing-value);
283        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
284    o pkg/exf & thsice:
285      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
286        diagnostics) even when SHORTWAVE_HEATING is #undef;
287    o verification/cfc_example:
288      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
289        illustrate how to use it).
290    o verification/offline_exf_seaice:
291      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
292        files to only one time-record.
293      in input.thermo: narrow the 2 bands of low initial ice-concentration near
294        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
295        snapshot output; same mcPheePiston value as in thsice with
296        surf-current=0.2m/s.
297      in input.thsice: similar set-up as in input.thermo (channel with same seaice
298        initial conditions).
299    o verification/cfc_example:
300      - update file "data" with more standard choice (default rotationPeriod,
301        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
302        set deltaTFreeSurf to deltaTtracer) and update the output.
303    o pkg/layers:
304      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
305      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
306    o verification/offline_exf_seaice:
307      - set all {field}period to zero for constant-in-time forcing (not tested
308        anywhere else).
309    o verification/offline_exf_seaice:
310      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
311      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
312    o model/src:
313      - implement Finite-Volume method for (hydrostatic) presure gradient
314        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
315    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
316      - In order to be compatible with the default EVP code, this requires changing
317        the EVP code around a little; and because any small change immediately
318        breaks the lab_sea.hb87 verification experiment, the reference output is
319        updated two times (each time the remaining aggrement was only 2 digits):
320        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
321        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
322        The adjoint test lab_sea.evp also needed to be updated.
323      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
324        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
325        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
326        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
327        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
328        kept obscure, because I need to test it a little more.
329    o pkg/cheapaml:
330      - fix few incorrect type (_RL/_RS) in subroutine calls.
331    o pkg/seaice:
332      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
333        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
334    o model/src:
335      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
336        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
337        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
338    o pkg/cheapaml:
339      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
340        update output of experiment cheapAML_box.
341      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
342        and set them only in one place (cheapaml_readparms.F).
343      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
344      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
345        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
346    o model/src/the_main_loop.F:
347      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
348    o pkg/seaice:
349      - remove legacy branch code.
350      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
351    o verification/*/code*/SEAICE_OPTIONS.h:
352      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
353        SEAICE_CAP_HEFF).
354    o pkg/cheapaml:
355      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
356        to load new forcing fields.
357      - add missing "_d 0" where it's needed; + some editing (improve indentation).
358      - remove switch to "-r8" compiler option (no longer needed) in verification
359        cheapAML_box, keep same output (small trucation error differences).
360    o verification/offline_exf_seaice:
361      - add thermodynamics only test.
362    o verification/cheapAML_box:
363      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
364        keep same output (same 14 digits for cg2d).
365      - switch on "-r8" compiler option (some numerical values are missing
366        the "_d 0") and update output (only 6 digits for cg2d were preserved).
367    
368    checkpoint64b (2012/12/24)
369    o pkg/cheapaml:
370      - remove un-used variables (Qnet,EmPmR) from pickup files.
371      - store tendency of advected variables into cheapaml pickup file
372        and fix the AB-2 restart.
373    o verification/offline_exf_seaice and lab_sea adjoint:
374      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
375      - switch to 4 time steps in offline, consistent with lab_sea.
376      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
377      - update results after change of experiment seaice.
378    o pkg/seaice:
379      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
380        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
381        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
382        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
383    o model/src:
384      - add run-time parameter to select CG2D solver minimum-residual solution
385        (in case of a poor convergence).
386    o pkg/seaice/seaice_lsr.F
387      - move calculation of matrix coefficients into new
388        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
389        file; the main purpose of this change is to be able to reuse the code
390        in S/R SEAICE_PRECONDITIONER
391      - modify the computation of the residual so that the mass of sea-ice
392        is not used twice; this simplifies the calculations, but since
393        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
394        not tested in testreport---this does not affect the testreport results.
395    o verification/seaice_obcs:
396      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
397        verification/lab_sea/input.salt_plume; changes results/output.txt*
398    o model/src:
399      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
400    o pkg/seaice:
401      - improve description of parameters in seaice_fgmres.F and start
402        cleaning up the code
403      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
404        second argument
405      - add a metric based on grid cell area to SEAICE_SCALPROD; update
406        results of offline_exf_seaice.dyn_jfnk
407      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
408    o pkg/aim_v23:
409      - fix an other bug in dissipation heating (grid-cell area was missing).
410    o model/src + pkg/seaice:
411      - add global (multi-tile) linear solver for pair of tri-diagonal system
412        along X and Y lines, respectively for U and V component.
413        Note: 1) MPI and cube-exchange not yet coded.
414            2) probably not accurate for poorly conditioned / large size problem.
415      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
416        default: not compiled and not used.
417    o pkg/seaice:
418      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
419        introduce bi/bj loops and use global_sum_tile_rl instead of
420        mpi_allreduce in seaice_fgmres.F
421      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
422      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
423      - add a verification experiment for JFNK in offline_exf_seaice
424    o verification:
425      - change (for now, only fwd test) offline_exf_seaice experiment:
426        use a re-entrant channel with idealized coastline (trapezoidal shape)
427        at southern boundary to explore seaice dynamics and thermodynamics
428        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
429        secondary test (input.thsice) use thermodynamics only with SST relaxation.
430      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
431    o pkg/exf:
432      - disable "sstExtrapol" when Nr=1
433    o verification:
434      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
435        to test pkg/cheapaml.
436    o pkg/aim_v23 & pkg/shap_filt:
437      - fix dissipation heating (erroneous gravity multiplication factor).
438    o pkg/seaice:
439      - remove unused field pressPre from jfnk solver
440      - rename two subroutines in seaice_preconditioner.F
441    o eesupp/src:
442       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
443    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
444       - remove wrong parts of the rhs and the lhs (were in there
445         because I did not understand the concept of this preconditioner)
446       - add an exchange between u- and v-sweep. This increases communication
447         by a factor of two but improves the convergence of jfnk. Ideally,
448         one would like the u- and v-sweep to be independent. So far within
449         undocumented ifdefs
450       - reorganize the extra computations for printing the residuals
451    o tools/genmake2:
452      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
453        since it's not necessary (and was preventing to use MNC in some cases).
454    
455    checkpoint64a (2012/11/16)
456    o pkg/autodiff:
457      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
458        autodiff_readparms.F no longer depends on calling order (within
459        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
460        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
461        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
462    o pkg/obcs:
463      - adding tidal velocity forcing capability to obcs
464        for usage example, see verification/seaice_obcs/input.tides
465    o pkg/seaice:
466      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
467        SEAICE_LSRrelaxU/V
468      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
469    o pkg/aim_v23:
470      - implement heating from friction (bottom friction and stratospheric drag).
471    o pkg/shap_filt:
472      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
473        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
474    o model/src:
475      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
476        time-constant addMass field from file (addMassFile);
477      - support for heating due to friction (and Kinetic Energy dissipation):
478        add option, run-time switch and 3-D field array + support code ; each pkg
479        or S/R can add heating contribution (if there is a sink of KE); the sum is
480        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
481    o pkg/seaice:
482      - complete merge of ITD code into seaice_growth.F
483        from MITgcm_contrib/torge/itd/code/
484        no verification so far, but Torge Martin tested
485        "1-D test case and Beaufort set up;
486        deliver okay results after 1 model year."
487      - complete merge of SEAICE_SIZE.h into all relevant routines
488      - move computation of eta at Z-points into calc_viscosities
489        + introduce global field etaZ
490        + add different methods for computing etaZ, for now the old
491          method (simple averages of eta to Z-points) is hardwired
492        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
493          seaice_preconditioner
494      - simplify computations for SEAICE_ZETA_SMOOTHREG
495      - seaice_preconditioner:
496        + replace one remaining press by pressLoc (mistake)
497        + adjust printing of residuals
498      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
499        + add (SEAICE.h) and rename some counters (initiliased in
500          seaice_init_fixed.F)
501        + add _BEGIN/END_MASTER (myThid)  around print statements
502        + print total number of iterations and failures over SEAICE_monFreq
503          interval to STDOUT
504      - move control over output-messages by fgmres to seaice_jfnk to save
505        some operations
506      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
507        in order to make restarts with sol .ne. zero (fgmres with restarts)
508        (seaice_jfnk.F, seaice_fgmres.F)
509      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
510        a serious convergence problem when open boundaries are involved
511    o pkg/ggl90: fix computation of control volumes for the case of
512      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
513      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
514    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
515    o pkg/autodiff
516      - Add inAdMode switch for SEAICEuseDYNAMICS:
517        SEAICEuseDYNAMICSinAdMode
518        (extend logic in ADAUTODIFF_INADMODE_SET)
519    o pkg/seaice
520      - Step 1 of merging ice-thickness distribution (ITD) code from
521        MITgcm_contrib/torge/itd/ (author: Torge Martin)
522        The code implements concept laid out in Thorndike et al. (1975);
523        code is enabled via CPP flag SEAICE_ITD
524        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
525        code is not complete yet!!
526      - SEAICE_SIZE.h now included in almost all seaice routines
527    o verification (using seaice):
528      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
529        global_ocean.cs32x15.seaice ; update results.
530      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
531      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
532        offline_exf_seaice (previously compiling B-grid).
533    o pkg/exf:
534      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
535        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
536        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
537    o pkg/layers (adjust changes from Sept 19):
538      - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
539        this allows to remove "layers_maxNum" dimension from all layers arrays.
540    o pkg/layers (adjust changes from Sept 19):
541      - remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ;
542      - snap-shot extended to all type of layers (not just the 1rst type);
543      - remove layers variables when corresponding CPP option is undef.
544    o pkg/layers:
545      - rename pkg/layers variable and add new output (layer exist & un-weighted
546        velocity in layer)
547    o pkg/seaice:
548      - simplify (?) ocean-drag coefficent computations by using
549        the same routine in all three solvers (saves some code lines)
550      - remove global fields DRAGA and DRAGS from C-grid code and
551        declare them locally in lsr.F (the only place where they are
552        still used)
553      - update AD output of lab_sea.evp (very sensitive anyway).
554    o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
555      (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
556      and SEAICEuseJFNK=.true. A few things to note:
557      - involves a FGMRES, that is parallel but very inefficient,
558        because of many scalar products (global sums) in the Gram-Schmidt
559        orthogonalization method. Needs to be replaced. Original code
560        from J.-F. Lemieux
561      - preconditioner for FGMRES is a stripped down version of LSOR
562      - SOLV_MAX_ITERS is now used for LSOR as a solver and as a
563        preconditioner. For the preconditioner, the default is set to 10.
564      - Jacobian times vector is computed with finite differences
565      - marginally related to JFNK-solver: add a smooth regularization for
566        zeta with tanh that will improve convergence (Lemieux and Tremblay,
567        2009) for any implicit solver (not implemented for EVP because EVP
568        does not need this regularization in the first place). Define
569        SEAICE_ZETA_SMOOTHREG in SEAICE_OPTIONS.h to use.
570    o eesupp/src:
571      - check in genmake2 that intrinsic S/R flush is available.
572      - add S/R to flush IO unit (if intrinsic S/R flush is available)
573      - flush standard & error msg unit before MPI termination
574      - if debugMode, flush IO unit after printing msg
575    o pkg/ctrl:
576      - ctrl_unpack.F, ALLOW_GENARR3D_CONTROL code: fix missing argument in call
577        to ctrl_set_unpack_xyz.
578    
579  checkpoint64 (2012/10/09)  checkpoint64 (2012/10/09)
580  o pkg/shelfice  o pkg/shelfice
581    - in mom_fluxform.F, mom_vecinv.F:    - in mom_fluxform.F, mom_vecinv.F:

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