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revision 1.1765 by heimbach, Fri Nov 9 22:51:48 2012 UTC revision 1.1859 by dimitri, Tue Apr 23 19:05:16 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 pkg/exf ALLOW_RUNOFTEMP
8      - if defined,  river and glacier runoff temperature can be read-in from
9        runoftempfile; runoftempfile needs to have same format as runofffile
10    o pkg/thsice (& pkg/bulk_force):
11      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
12        for energy content of Precip + RunOff & Evap (like with pkg/exf).
13      - change computation domain to always be the interior (without overlap).
14      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
15    o verification/tutorial_global_oce_biogeo:
16      - add preliminary OpenAD setup (still has problems)
17    o model/src:
18      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
19      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
20      - move forcing adjustment (balancing surface forcing) in specific S/R
21        where might also be applied exchanges (if needed) to forcing arrays.
22    o pkg/shelfice:
23      - allow to specify the Ice-Shelf mass per unit area (instead of
24        shelficeLoadAnomaly) and do the conversion from one to the other
25      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
26        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
27        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
28        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
29      - update isomip experiment forward output (get machine truncation error
30        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
31    o verification/offline_exf_seaice:
32      revise data.seaice in input.thermo and input_ad and update results accordingly
33        HO = 0.2, SEAICE_areaLossFormula = 2,
34        SEAICE_growMeltByConv = .TRUE.,
35        SEAICE_doOpenWaterMelt = .TRUE.,
36      Improve consistency with input.thsice and fix the spurious 500m ice corners
37    o verification/global_ocean.cs32x15:
38      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
39        in icedyn (thsice+seaice-dyn) test and update output.
40    o verification/offline_exf_seaice:
41      - adjust list of tested variables (with testreport) and update
42        standard test output with better slection of monitored fields.
43    o pkg/cd_code:
44      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
45        experiment lab_sea.hb87
46    o tools/genmake2:
47      - change default makedepend from the system default to tools/xmakedepend:
48        When no makedepend is specified, select tools/xmakedepend it the test pass,
49        otherwise select the system default (if exist and pass the test) or
50        try to build cyrus-makedepend ; stop if none of the 3 works.
51    o pkg/exf & pkg/thsice:
52      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
53        for energy content of Precip + RunOff & Evap. Assumes:
54       1) Rain has same temp as Air.
55       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
56       3) Run-Off comes at the temp of surface water (with same Cp)
57       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
58        put directly into Latent Heat flux & should use water-vapor heat capacity.
59       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
60        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
61    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
62        (compile when SEAICE_ALLOW_JFNK is defined)
63    o pkg/thsice:
64      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
65        implementation): move THSICE_AVE call after the advection (called directly
66        from thsice_do_advect.F).
67    o verification/global_ocean.90x40x15 and OpenAD:
68      New experiment for OpenAD is identical to the one in input_ad except that
69        multiDimAdvection=.FALSE.,
70      There is still an issue with this.
71    o pkg/thsice:
72      - account for ice velocity (ocean relative velocity) in turbulent heat flux
73        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
74        and offline_exf_seaice (main test).
75    
76    checkpoint64f (2013/03/31)
77    o verification/OpenAD:
78      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
79    o verification/isomip, pkg/shelfice and OpenAD:
80      - add OpenAD setup to this exp and make shelfice package work with OpenAD
81    o verification/tutorial_global_oce_biogeo:
82      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
83    o verification/offline_exf_seaice:
84      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
85    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
86      - add OpenAD setup to this exp and make ptracers package work with OpenAD
87    o pkg/seaice/seaice_evp.F:
88       mask the asymmetric contribution of the ice-ocean stress (when
89       the turningAngle is non-zero) over open water to avoid stripes
90       in the EVP-solutions after many EVP-substeps. This does not change
91       the verification experiment (because turningAngle=0 in that experiment),
92       but will affect other EVP solutions with turningAngle.ne.0
93    o verification, AD & TLM output:
94      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
95        additions and multiplications which affect results at machine truncation
96        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
97        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
98        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
99        digits of matching.
100    o pkg/seaice:
101       modify lsr-algorithm so that it vectorizes AND converges by using a
102       "zebra" method: split vector loop into two with step size 2; this
103       solves a general convergence problem for the JFNK solver on a vector
104       computer. It has the potential to even improve convergence for
105       non-vector machines, but it does change the results so it is turned
106       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
107       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
108    
109    checkpoint64e (2013/03/05)
110    o pkg/ecco and several verification experiments:
111       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
112       from ecco package, and revert to unified routine in model/src/
113       Adjust verification experiments accordingly, especially gloal_oce_llc90
114       Should conclude long-standing work by Gael to reconsile the_main_loop with
115       ECCO and will enable OpenAD's revolve loop in ECCO setup.
116    o pkg/generic_advdiff:
117      - implement compressible flow method for multi-dim advection (similar to
118        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
119        TAF generates many recomputations) to use it; no yet coded with implicit
120        vertical advection.
121      - change experiment advect_cs (new output) and advect_xy (same output)
122        to test compressible flow multi-dim advection.
123    o pkg/generic_advdiff:
124      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
125        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
126    o pkg/seaice:
127      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
128        bug affects two verification experiments (lab_sea and lab_sea.hb87),
129        recover old (wrong) results by setting noSlipFac = 2. in
130        seaice_calc_strainrates.F;
131      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
132      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
133        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
134      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
135    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
136      - new subroutines seaice_lsr_tridiagu/v
137      - introduce loop bounds i/jmin/max to be able to use a restricted
138        additive Schwarz method, but not used for now.
139      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
140      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
141    o OpenAD support
142       Reorganize S/R call for overall time-stepping loop to facilitate
143       OpenAD revolve loop replacement
144       (new S/R main_do_loop.F)
145    o model/src:
146      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
147      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
148        ADAMS_BASHFORTH2.
149    o pkg/cheapaml:
150      - add new parameter (default=F, same as before) to disable full domain
151        (including land) periodicity in X & Y dir.
152      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
153        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
154        into single S/R CHEAPAML_TIMESTEP.
155    
156    checkpoint64d (2013/02/17)
157    o pkg/monitor (angular momentum):
158      - do not add Eta contribution to the total AM if using rigid-lid;
159      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
160      - horizontal discretisation: compute Zonal wind contribution separately for
161        each component (instead of from cell centered averaged) and use the 4
162        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
163      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
164        FreeSurf) if using vectorInvariant momentum.
165    o model/src (horizontal grid):
166      - move initialisation of all horizontal grid arrays to null value
167        from specific horizontal grid S/R to main S/R INI_GRID;
168      - add 2 new arrays to project model C-grid velocity on to zonal direction
169        (similar to AngleCosC & -AngleSinC but at U and V point location) and
170        compute them in S/R CALC_GRID_ANGLES.
171    o pkg/seaice: replace a hard coded parameter by a runtime parameter
172        SEAICE_JFNK_tolIter
173    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
174        preconditioner for JFNK (run LSR into the overlaps as far as possible,
175        i.e OLx/y-2, but overwrite the solution in the overlaps)
176      - extend loop range in seaice_calc_viscosity
177      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
178      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
179      - slightly modify loops in tridiagonal solver lsr-preconditioner
180      - by default remove the extra exchange in seaice_preconditioner with a
181        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
182      - modify offline_exf_seaice so that old results without RAS are reproduced
183        for output.dyn_jfnk.txt
184      in seaice_fgmres.F (unrelated to RAS)
185      - add a cpp-flag option for a re-ordered mapping (potentially more
186        efficient), but because this changes the results, turn it off by
187        default
188      - replace the save statement by local common blocks
189    o utils/matlab:
190      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
191      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
192        instead of local script "load_cs.m".
193    o pkg/seaice:
194      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
195        to the scalarProductMetric and the unrolling. By chance this does not
196        change the verification experiment, because of the particular domain
197        decomposition
198    o pkg/diagnostics:
199      - change default missing_value from UNSET_RL to -999.
200    o pkg/layers: improve vectorization of layers_fluxcalc.F
201      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
202        time spent in this routine by more than a factor of 3 on an NEC-SX8
203      - step 2: replace search algorithm by a bisection algorithm found in
204        Press et al. Numerical Recipes in Fortran. This algorithm can be
205        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
206        For now, use this algorithm only for TARGET_NEC_SX defined.
207      - moved the search algorithm into a separate subroutine, that is kept
208        within the same file for automatic inlining.
209      - modified catching potential errors
210    o pkg/ecco:
211      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
212    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
213      - modifications for ALLOW_GENTIM2D_CONTROL
214      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
215      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
216      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
217      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
218    o model/src:
219      - account for moist thermodynamics in (dry) potential temperature equation;
220        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
221        and cpl_aim+ocn.
222      - also switch to standard compiler (gfortran, was using ifort previously)
223        for fizhi-cs experiments reference output.
224    o pkg/ctrl:
225      - 1st step toward generic time-varying control variable (2D) via CPP option
226        ALLOW_GENTIM2D_CONTROL
227      - note new namelist ctrl_nml_genarr in data.ctrl
228    o verification/global_ocean.cs32x15:
229      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
230        thsice calling sequence and update "output.icedyn.txt" output file.
231    o pkg/ptracers:
232      - from Ryan A.: code to allow to restart a tracer at regular time interval
233        specifying a reset frequency and a reset-phase (for each tracers).
234    o pkg/thsice:
235      - implement new sequence of calls for thsice+seaice:
236          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
237          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
238      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
239        in CPP_OPTIONS.h) to recover old sequence;
240      - update diagnostics for Intermediate State thsice diagnostics: now filled
241        just before advection (instead of just after advection in old sequence);
242      - update output of experiment offline_exf_seaice (standard test);
243      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
244        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
245    o pkg/aim_v23:
246      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
247      - use standard pkg/mdsio routines to read & write CO2 pickup file;
248      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
249      - Implement new sequence of calls for seaice advection (with thsice and
250        seaice diffusion): do ice advection after ice-Thermodynamic (previously
251        was done before); change aim_do_physics.F (split the bi,bj loops block);
252      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
253    o pkg/thsice:
254      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
255        where just seaice diffusion is used without seaice-dynamics.
256    
257    checkpoint64c (2013/01/18)
258    o pkg/seaice:
259      - add a parameter JFNKres_tFac that can replace JFNKres_t
260        (= JFNKres_tFac*JFNKresidual before JFNK solver)
261      - add a line search option to the JFNK solver
262      - move update of u/vIce and computation of initial residual into a separate
263        routine (same file); makes the code a little easier to read (?)
264      - the line search requires computation of the residual and for some reason
265        I cannot do the update of u/vIce at the beginning of the Newton loop
266        without changing the results, so we move computation of the new residual
267        also to the end of the Newton loop, even without the line search
268    o pkg/mdsio:
269      - write missing value (corresponding to undefined array value) to meta files;
270        skip this if missing value is one (UNSET_RL would be a better value for the
271        case of undefined missing value but it's current the default missing-value);
272        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
273    o pkg/exf & thsice:
274      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
275        diagnostics) even when SHORTWAVE_HEATING is #undef;
276    o verification/cfc_example:
277      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
278        illustrate how to use it).
279    o verification/offline_exf_seaice:
280      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
281        files to only one time-record.
282      in input.thermo: narrow the 2 bands of low initial ice-concentration near
283        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
284        snapshot output; same mcPheePiston value as in thsice with
285        surf-current=0.2m/s.
286      in input.thsice: similar set-up as in input.thermo (channel with same seaice
287        initial conditions).
288    o verification/cfc_example:
289      - update file "data" with more standard choice (default rotationPeriod,
290        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
291        set deltaTFreeSurf to deltaTtracer) and update the output.
292    o pkg/layers:
293      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
294      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
295    o verification/offline_exf_seaice:
296      - set all {field}period to zero for constant-in-time forcing (not tested
297        anywhere else).
298    o verification/offline_exf_seaice:
299      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
300      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
301    o model/src:
302      - implement Finite-Volume method for (hydrostatic) presure gradient
303        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
304    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
305      - In order to be compatible with the default EVP code, this requires changing
306        the EVP code around a little; and because any small change immediately
307        breaks the lab_sea.hb87 verification experiment, the reference output is
308        updated two times (each time the remaining aggrement was only 2 digits):
309        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
310        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
311        The adjoint test lab_sea.evp also needed to be updated.
312      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
313        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
314        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
315        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
316        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
317        kept obscure, because I need to test it a little more.
318    o pkg/cheapaml:
319      - fix few incorrect type (_RL/_RS) in subroutine calls.
320    o pkg/seaice:
321      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
322        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
323    o model/src:
324      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
325        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
326        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
327    o pkg/cheapaml:
328      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
329        update output of experiment cheapAML_box.
330      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
331        and set them only in one place (cheapaml_readparms.F).
332      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
333      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
334        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
335    o model/src/the_main_loop.F:
336      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
337    o pkg/seaice:
338      - remove legacy branch code.
339      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
340    o verification/*/code*/SEAICE_OPTIONS.h:
341      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
342        SEAICE_CAP_HEFF).
343    o pkg/cheapaml:
344      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
345        to load new forcing fields.
346      - add missing "_d 0" where it's needed; + some editing (improve indentation).
347      - remove switch to "-r8" compiler option (no longer needed) in verification
348        cheapAML_box, keep same output (small trucation error differences).
349    o verification/offline_exf_seaice:
350      - add thermodynamics only test.
351    o verification/cheapAML_box:
352      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
353        keep same output (same 14 digits for cg2d).
354      - switch on "-r8" compiler option (some numerical values are missing
355        the "_d 0") and update output (only 6 digits for cg2d were preserved).
356    
357    checkpoint64b (2012/12/24)
358    o pkg/cheapaml:
359      - remove un-used variables (Qnet,EmPmR) from pickup files.
360      - store tendency of advected variables into cheapaml pickup file
361        and fix the AB-2 restart.
362    o verification/offline_exf_seaice and lab_sea adjoint:
363      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
364      - switch to 4 time steps in offline, consistent with lab_sea.
365      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
366      - update results after change of experiment seaice.
367    o pkg/seaice:
368      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
369        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
370        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
371        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
372    o model/src:
373      - add run-time parameter to select CG2D solver minimum-residual solution
374        (in case of a poor convergence).
375    o pkg/seaice/seaice_lsr.F
376      - move calculation of matrix coefficients into new
377        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
378        file; the main purpose of this change is to be able to reuse the code
379        in S/R SEAICE_PRECONDITIONER
380      - modify the computation of the residual so that the mass of sea-ice
381        is not used twice; this simplifies the calculations, but since
382        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
383        not tested in testreport---this does not affect the testreport results.
384    o verification/seaice_obcs:
385      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
386        verification/lab_sea/input.salt_plume; changes results/output.txt*
387    o model/src:
388      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
389    o pkg/seaice:
390      - improve description of parameters in seaice_fgmres.F and start
391        cleaning up the code
392      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
393        second argument
394      - add a metric based on grid cell area to SEAICE_SCALPROD; update
395        results of offline_exf_seaice.dyn_jfnk
396      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
397    o pkg/aim_v23:
398      - fix an other bug in dissipation heating (grid-cell area was missing).
399    o model/src + pkg/seaice:
400      - add global (multi-tile) linear solver for pair of tri-diagonal system
401        along X and Y lines, respectively for U and V component.
402        Note: 1) MPI and cube-exchange not yet coded.
403            2) probably not accurate for poorly conditioned / large size problem.
404      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
405        default: not compiled and not used.
406    o pkg/seaice:
407      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
408        introduce bi/bj loops and use global_sum_tile_rl instead of
409        mpi_allreduce in seaice_fgmres.F
410      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
411      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
412      - add a verification experiment for JFNK in offline_exf_seaice
413    o verification:
414      - change (for now, only fwd test) offline_exf_seaice experiment:
415        use a re-entrant channel with idealized coastline (trapezoidal shape)
416        at southern boundary to explore seaice dynamics and thermodynamics
417        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
418        secondary test (input.thsice) use thermodynamics only with SST relaxation.
419      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
420    o pkg/exf:
421      - disable "sstExtrapol" when Nr=1
422    o verification:
423      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
424        to test pkg/cheapaml.
425    o pkg/aim_v23 & pkg/shap_filt:
426      - fix dissipation heating (erroneous gravity multiplication factor).
427    o pkg/seaice:
428      - remove unused field pressPre from jfnk solver
429      - rename two subroutines in seaice_preconditioner.F
430    o eesupp/src:
431       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
432    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
433       - remove wrong parts of the rhs and the lhs (were in there
434         because I did not understand the concept of this preconditioner)
435       - add an exchange between u- and v-sweep. This increases communication
436         by a factor of two but improves the convergence of jfnk. Ideally,
437         one would like the u- and v-sweep to be independent. So far within
438         undocumented ifdefs
439       - reorganize the extra computations for printing the residuals
440    o tools/genmake2:
441      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
442        since it's not necessary (and was preventing to use MNC in some cases).
443    
444    checkpoint64a (2012/11/16)
445    o pkg/autodiff:
446      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
447        autodiff_readparms.F no longer depends on calling order (within
448        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
449        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
450        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
451    o pkg/obcs:
452      - adding tidal velocity forcing capability to obcs
453        for usage example, see verification/seaice_obcs/input.tides
454    o pkg/seaice:
455      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
456        SEAICE_LSRrelaxU/V
457      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
458    o pkg/aim_v23:
459      - implement heating from friction (bottom friction and stratospheric drag).
460    o pkg/shap_filt:
461      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
462        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
463    o model/src:
464      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
465        time-constant addMass field from file (addMassFile);
466      - support for heating due to friction (and Kinetic Energy dissipation):
467        add option, run-time switch and 3-D field array + support code ; each pkg
468        or S/R can add heating contribution (if there is a sink of KE); the sum is
469        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
470  o pkg/seaice:  o pkg/seaice:
471    - complete merge of ITD code into seaice_growth.F    - complete merge of ITD code into seaice_growth.F
472      from MITgcm_contrib/torge/itd/code/      from MITgcm_contrib/torge/itd/code/
# Line 15  o pkg/seaice: Line 478  o pkg/seaice:
478      + introduce global field etaZ      + introduce global field etaZ
479      + add different methods for computing etaZ, for now the old      + add different methods for computing etaZ, for now the old
480        method (simple averages of eta to Z-points) is hardwired        method (simple averages of eta to Z-points) is hardwired
481      + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,      + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
482        seaice_preconditioner        seaice_preconditioner
483    - simplify computations for SEAICE_ZETA_SMOOTHREG    - simplify computations for SEAICE_ZETA_SMOOTHREG
484    - seaice_preconditioner:    - seaice_preconditioner:
485      + replace one remaining press by pressLoc (mistake)      + replace one remaining press by pressLoc (mistake)
486      + adjust printing of residuals      + adjust printing of residuals
487    - improve I/O of diagnostics of JFNK in seaice_jfnk.F:    - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
488      + add (SEAICE.h) and rename some counters (initiliased in      + add (SEAICE.h) and rename some counters (initiliased in
489        seaice_init_fixed.F)        seaice_init_fixed.F)
490      + add _BEGIN/END_MASTER (myThid)  around print statements      + add _BEGIN/END_MASTER (myThid)  around print statements
491      + print total number of iterations and failures over SEAICE_monFreq      + print total number of iterations and failures over SEAICE_monFreq
# Line 34  o pkg/seaice: Line 497  o pkg/seaice:
497      (seaice_jfnk.F, seaice_fgmres.F)      (seaice_jfnk.F, seaice_fgmres.F)
498    - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes    - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
499      a serious convergence problem when open boundaries are involved      a serious convergence problem when open boundaries are involved
500  o pkg/ggl90: fix computation of control volumes for the case of  o pkg/ggl90: fix computation of control volumes for the case of
501    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
502    up half a grid cell from C-centered to W-centered (pointed out by C. Eden)    up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
503  o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC  o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
504  o pkg/autodiff  o pkg/autodiff
505    - Add inAdMode switch for SEAICEuseDYNAMICS:    - Add inAdMode switch for SEAICEuseDYNAMICS:
506      SEAICEuseDYNAMICSinAdMode      SEAICEuseDYNAMICSinAdMode
507      (extend logic in ADAUTODIFF_INADMODE_SET)      (extend logic in ADAUTODIFF_INADMODE_SET)
508  o pkg/seaice  o pkg/seaice
509    - Step 1 of merging ice-thickness distribution (ITD) code from    - Step 1 of merging ice-thickness distribution (ITD) code from

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