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revision 1.1753 by jmc, Fri Oct 19 18:52:53 2012 UTC revision 1.1874 by jmc, Thu Jun 6 16:06:23 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/cfc:
8      - change time interpolation for atmospheric CFC-11 (now same as for CFC-12);
9        update output (CFC-11) of experiment cfc_example and tutorial_cfc_offline.
10    o pkg/seaice:
11      - allow to use seaice dynamics without pkg/exf (e.g., using pkg/cheapaml)
12    o pkg/seaice: add Adams-Bashforth2 time discretization for ice dynamics;
13                  so far only for JFNK-solver, turn on with SEAICEuseAB2 = .TRUE.
14      - requires an additional time level that is stored in the pickup
15      - you can start with AB2 from a pickup without this time level with
16        pickupStrictlyMatch = .false.
17    
18    checkpoint64h (2013/05/26)
19    o pkg/cheapaml:
20      - replace one ()**.5 with SQRT + use temp var "cdu = tau/Du" (coare3_flux);
21        affect machine truncation (but exp cheapAML_box still pass with 13 digits).
22      - consistent treatment of uWind,vWind location: assume everywhere in
23        pkg/cheapaml that they are on C-grid (@ uVel,vVel location)
24        (Note: was already the case for Tair,Qair advection);
25        add option (INCONSISTENT_WIND_LOCATION) to recover old results.
26      - compute diabatic forcing only in the interior (excluding overlap regions)
27      - fill in array "Qsw" (for short-wave heating);
28      - add diagnostic for precip ; fill-in diagnostics for cheapAML state vars
29        before any update (consistent with MITgcm state var diagnostics);
30      - cheapaml_fields_load.F & cheapaml_init_varia.F : only fill outer edges if
31        non periodic ; + adjusted for uWind,vWind (C-grid).
32    o pkg/seaice:
33      - remove dependence of pkg/seaice versus pkg/exf (file: pkg/pkg_depend) and
34        add explicitly pkg/exf in experiments that currently use pkg/seaice.
35      - allows to compile pkg/seaice without pkg/exf.
36    o tools/OAD_support:
37      - use a local copy (ourRWCPinBd) to ensure index ourRWCP stays within bounds
38        of array "ourStepOf" in function rvNextAction (revolve.F90).
39    o pkg/aim_compon_interf renamed to pkg/atm_compon_interf
40      - change pkg name (to be used with other atmospheric physics pkg)
41        but by-pass CVS when making the new pkg so that we keep the CVS history.
42    o pkg/offline:
43      - call OFFLINE_FIELDS_LOAD from pkg/offline/offline_init_varia.F
44        (previously called from pkg/dic_surfforcing_init.F)
45    o model/src:
46      - re-order sequence of calls within packages_init_variables.F, using
47        standard order, except for:
48         DIAGNOSTICS_INIT_VARIA and OFFLINE_INIT_VARIA (called @ the top),
49         CTRL_MAP_INI and OBCS_INIT_VARIABLES (called @ the bottom)
50    o new pkg: atm_phys
51      - add entry point and source code (previously in contrib
52          verification_other/atm_gray/code_gray/) for new pkg "atm_phys"
53        (atmospheric physics pkg from P. O'Gorman and T. Schneider, JCl, 2008).
54      - re-order sequence of calls within packages_readparms.F,
55         packages_init_fixed.F and packages_write_pickup.F
56        (but skip packages_init_variables.F because of TAF issues).
57      - update contrib/*/atm_gray/ experiment.
58    o pkg/seaice (ITD code):
59      - simplify and fix the writing of pickup-files for ITD case
60    o pkg/seaice (ITD code):
61      - introduce floe size dependent lateral melt for ITD case;
62      - cleaning (avoid division by zero, change to f77 syntax, remove tabs)
63      - update seaice_itd experiment main output.
64    o pkg/thsice:
65      - remove snowPrc from common block THSICE_FLUX, in THSICE_VARS.h and
66        declared it locally (without bi,bj) in thsice_main.F & aim_do_physics.F;
67        changed accordingly pkg/atm2d.
68    
69    checkpoint64g (2013/05/01)
70    o pkg/exf ALLOW_RUNOFTEMP
71      - if defined,  river and glacier runoff temperature can be read-in from
72        runoftempfile; runoftempfile needs to have same format as runofffile
73    o pkg/thsice (& pkg/bulk_force):
74      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
75        for energy content of Precip + RunOff & Evap (like with pkg/exf).
76      - change computation domain to always be the interior (without overlap).
77      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
78    o verification/tutorial_global_oce_biogeo:
79      - add preliminary OpenAD setup (still has problems)
80    o pkg/seaice:
81      - turn some parameters for choosing the convergence criterion of
82        the inexact Newton method (JFNK) into runtime parameters for convenience
83      - clean up seaice_calc_viscosities.F: remove/retire two options for
84        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
85        the results of lab_sea/input because a division has been replaced by
86        a multiplication with the reciprocal (sumNorm)
87      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
88        convergence of solver (changes results, of course), and to test some
89        new features
90    o model/src:
91      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
92      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
93      - move forcing adjustment (balancing surface forcing) in specific S/R
94        where might also be applied exchanges (if needed) to forcing arrays.
95    o pkg/shelfice:
96      - allow to specify the Ice-Shelf mass per unit area (instead of
97        shelficeLoadAnomaly) and do the conversion from one to the other
98      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
99        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
100        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
101        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
102      - update isomip experiment forward output (get machine truncation error
103        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
104    o verification/offline_exf_seaice:
105      revise data.seaice in input.thermo and input_ad and update results accordingly
106        HO = 0.2, SEAICE_areaLossFormula = 2,
107        SEAICE_growMeltByConv = .TRUE.,
108        SEAICE_doOpenWaterMelt = .TRUE.,
109      Improve consistency with input.thsice and fix the spurious 500m ice corners
110    o verification/global_ocean.cs32x15:
111      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
112        in icedyn (thsice+seaice-dyn) test and update output.
113    o verification/offline_exf_seaice:
114      - adjust list of tested variables (with testreport) and update
115        standard test output with better slection of monitored fields.
116    o pkg/cd_code:
117      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
118        experiment lab_sea.hb87
119    o tools/genmake2:
120      - change default makedepend from the system default to tools/xmakedepend:
121        When no makedepend is specified, select tools/xmakedepend it the test pass,
122        otherwise select the system default (if exist and pass the test) or
123        try to build cyrus-makedepend ; stop if none of the 3 works.
124    o pkg/exf & pkg/thsice:
125      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
126        for energy content of Precip + RunOff & Evap. Assumes:
127       1) Rain has same temp as Air.
128       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
129       3) Run-Off comes at the temp of surface water (with same Cp)
130       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
131        put directly into Latent Heat flux & should use water-vapor heat capacity.
132       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
133        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
134    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
135        (compile when SEAICE_ALLOW_JFNK is defined)
136    o pkg/thsice:
137      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
138        implementation): move THSICE_AVE call after the advection (called directly
139        from thsice_do_advect.F).
140    o verification/global_ocean.90x40x15 and OpenAD:
141      New experiment for OpenAD is identical to the one in input_ad except that
142        multiDimAdvection=.FALSE.,
143      There is still an issue with this.
144    o pkg/thsice:
145      - account for ice velocity (ocean relative velocity) in turbulent heat flux
146        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
147        and offline_exf_seaice (main test).
148    
149    checkpoint64f (2013/03/31)
150    o verification/OpenAD:
151      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
152    o verification/isomip, pkg/shelfice and OpenAD:
153      - add OpenAD setup to this exp and make shelfice package work with OpenAD
154    o verification/tutorial_global_oce_biogeo:
155      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
156    o verification/offline_exf_seaice:
157      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
158    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
159      - add OpenAD setup to this exp and make ptracers package work with OpenAD
160    o pkg/seaice/seaice_evp.F:
161       mask the asymmetric contribution of the ice-ocean stress (when
162       the turningAngle is non-zero) over open water to avoid stripes
163       in the EVP-solutions after many EVP-substeps. This does not change
164       the verification experiment (because turningAngle=0 in that experiment),
165       but will affect other EVP solutions with turningAngle.ne.0
166    o verification, AD & TLM output:
167      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
168        additions and multiplications which affect results at machine truncation
169        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
170        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
171        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
172        digits of matching.
173    o pkg/seaice:
174       modify lsr-algorithm so that it vectorizes AND converges by using a
175       "zebra" method: split vector loop into two with step size 2; this
176       solves a general convergence problem for the JFNK solver on a vector
177       computer. It has the potential to even improve convergence for
178       non-vector machines, but it does change the results so it is turned
179       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
180       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
181    
182    checkpoint64e (2013/03/05)
183    o pkg/ecco and several verification experiments:
184       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
185       from ecco package, and revert to unified routine in model/src/
186       Adjust verification experiments accordingly, especially gloal_oce_llc90
187       Should conclude long-standing work by Gael to reconsile the_main_loop with
188       ECCO and will enable OpenAD's revolve loop in ECCO setup.
189    o pkg/generic_advdiff:
190      - implement compressible flow method for multi-dim advection (similar to
191        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
192        TAF generates many recomputations) to use it; no yet coded with implicit
193        vertical advection.
194      - change experiment advect_cs (new output) and advect_xy (same output)
195        to test compressible flow multi-dim advection.
196    o pkg/generic_advdiff:
197      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
198        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
199    o pkg/seaice:
200      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
201        bug affects two verification experiments (lab_sea and lab_sea.hb87),
202        recover old (wrong) results by setting noSlipFac = 2. in
203        seaice_calc_strainrates.F;
204      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
205      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
206        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
207      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
208    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
209      - new subroutines seaice_lsr_tridiagu/v
210      - introduce loop bounds i/jmin/max to be able to use a restricted
211        additive Schwarz method, but not used for now.
212      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
213      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
214    o OpenAD support
215       Reorganize S/R call for overall time-stepping loop to facilitate
216       OpenAD revolve loop replacement
217       (new S/R main_do_loop.F)
218    o model/src:
219      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
220      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
221        ADAMS_BASHFORTH2.
222    o pkg/cheapaml:
223      - add new parameter (default=F, same as before) to disable full domain
224        (including land) periodicity in X & Y dir.
225      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
226        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
227        into single S/R CHEAPAML_TIMESTEP.
228    
229    checkpoint64d (2013/02/17)
230    o pkg/monitor (angular momentum):
231      - do not add Eta contribution to the total AM if using rigid-lid;
232      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
233      - horizontal discretisation: compute Zonal wind contribution separately for
234        each component (instead of from cell centered averaged) and use the 4
235        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
236      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
237        FreeSurf) if using vectorInvariant momentum.
238    o model/src (horizontal grid):
239      - move initialisation of all horizontal grid arrays to null value
240        from specific horizontal grid S/R to main S/R INI_GRID;
241      - add 2 new arrays to project model C-grid velocity on to zonal direction
242        (similar to AngleCosC & -AngleSinC but at U and V point location) and
243        compute them in S/R CALC_GRID_ANGLES.
244    o pkg/seaice: replace a hard coded parameter by a runtime parameter
245        SEAICE_JFNK_tolIter
246    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
247        preconditioner for JFNK (run LSR into the overlaps as far as possible,
248        i.e OLx/y-2, but overwrite the solution in the overlaps)
249      - extend loop range in seaice_calc_viscosity
250      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
251      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
252      - slightly modify loops in tridiagonal solver lsr-preconditioner
253      - by default remove the extra exchange in seaice_preconditioner with a
254        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
255      - modify offline_exf_seaice so that old results without RAS are reproduced
256        for output.dyn_jfnk.txt
257      in seaice_fgmres.F (unrelated to RAS)
258      - add a cpp-flag option for a re-ordered mapping (potentially more
259        efficient), but because this changes the results, turn it off by
260        default
261      - replace the save statement by local common blocks
262    o utils/matlab:
263      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
264      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
265        instead of local script "load_cs.m".
266    o pkg/seaice:
267      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
268        to the scalarProductMetric and the unrolling. By chance this does not
269        change the verification experiment, because of the particular domain
270        decomposition
271    o pkg/diagnostics:
272      - change default missing_value from UNSET_RL to -999.
273    o pkg/layers: improve vectorization of layers_fluxcalc.F
274      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
275        time spent in this routine by more than a factor of 3 on an NEC-SX8
276      - step 2: replace search algorithm by a bisection algorithm found in
277        Press et al. Numerical Recipes in Fortran. This algorithm can be
278        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
279        For now, use this algorithm only for TARGET_NEC_SX defined.
280      - moved the search algorithm into a separate subroutine, that is kept
281        within the same file for automatic inlining.
282      - modified catching potential errors
283    o pkg/ecco:
284      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
285    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
286      - modifications for ALLOW_GENTIM2D_CONTROL
287      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
288      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
289      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
290      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
291    o model/src:
292      - account for moist thermodynamics in (dry) potential temperature equation;
293        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
294        and cpl_aim+ocn.
295      - also switch to standard compiler (gfortran, was using ifort previously)
296        for fizhi-cs experiments reference output.
297    o pkg/ctrl:
298      - 1st step toward generic time-varying control variable (2D) via CPP option
299        ALLOW_GENTIM2D_CONTROL
300      - note new namelist ctrl_nml_genarr in data.ctrl
301    o verification/global_ocean.cs32x15:
302      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
303        thsice calling sequence and update "output.icedyn.txt" output file.
304    o pkg/ptracers:
305      - from Ryan A.: code to allow to restart a tracer at regular time interval
306        specifying a reset frequency and a reset-phase (for each tracers).
307    o pkg/thsice:
308      - implement new sequence of calls for thsice+seaice:
309          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
310          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
311      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
312        in CPP_OPTIONS.h) to recover old sequence;
313      - update diagnostics for Intermediate State thsice diagnostics: now filled
314        just before advection (instead of just after advection in old sequence);
315      - update output of experiment offline_exf_seaice (standard test);
316      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
317        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
318    o pkg/aim_v23:
319      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
320      - use standard pkg/mdsio routines to read & write CO2 pickup file;
321      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
322      - Implement new sequence of calls for seaice advection (with thsice and
323        seaice diffusion): do ice advection after ice-Thermodynamic (previously
324        was done before); change aim_do_physics.F (split the bi,bj loops block);
325      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
326    o pkg/thsice:
327      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
328        where just seaice diffusion is used without seaice-dynamics.
329    
330    checkpoint64c (2013/01/18)
331    o pkg/seaice:
332      - add a parameter JFNKres_tFac that can replace JFNKres_t
333        (= JFNKres_tFac*JFNKresidual before JFNK solver)
334      - add a line search option to the JFNK solver
335      - move update of u/vIce and computation of initial residual into a separate
336        routine (same file); makes the code a little easier to read (?)
337      - the line search requires computation of the residual and for some reason
338        I cannot do the update of u/vIce at the beginning of the Newton loop
339        without changing the results, so we move computation of the new residual
340        also to the end of the Newton loop, even without the line search
341    o pkg/mdsio:
342      - write missing value (corresponding to undefined array value) to meta files;
343        skip this if missing value is one (UNSET_RL would be a better value for the
344        case of undefined missing value but it's current the default missing-value);
345        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
346    o pkg/exf & thsice:
347      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
348        diagnostics) even when SHORTWAVE_HEATING is #undef;
349    o verification/cfc_example:
350      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
351        illustrate how to use it).
352    o verification/offline_exf_seaice:
353      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
354        files to only one time-record.
355      in input.thermo: narrow the 2 bands of low initial ice-concentration near
356        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
357        snapshot output; same mcPheePiston value as in thsice with
358        surf-current=0.2m/s.
359      in input.thsice: similar set-up as in input.thermo (channel with same seaice
360        initial conditions).
361    o verification/cfc_example:
362      - update file "data" with more standard choice (default rotationPeriod,
363        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
364        set deltaTFreeSurf to deltaTtracer) and update the output.
365    o pkg/layers:
366      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
367      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
368    o verification/offline_exf_seaice:
369      - set all {field}period to zero for constant-in-time forcing (not tested
370        anywhere else).
371    o verification/offline_exf_seaice:
372      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
373      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
374    o model/src:
375      - implement Finite-Volume method for (hydrostatic) presure gradient
376        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
377    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
378      - In order to be compatible with the default EVP code, this requires changing
379        the EVP code around a little; and because any small change immediately
380        breaks the lab_sea.hb87 verification experiment, the reference output is
381        updated two times (each time the remaining aggrement was only 2 digits):
382        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
383        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
384        The adjoint test lab_sea.evp also needed to be updated.
385      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
386        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
387        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
388        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
389        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
390        kept obscure, because I need to test it a little more.
391    o pkg/cheapaml:
392      - fix few incorrect type (_RL/_RS) in subroutine calls.
393    o pkg/seaice:
394      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
395        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
396    o model/src:
397      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
398        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
399        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
400    o pkg/cheapaml:
401      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
402        update output of experiment cheapAML_box.
403      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
404        and set them only in one place (cheapaml_readparms.F).
405      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
406      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
407        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
408    o model/src/the_main_loop.F:
409      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
410    o pkg/seaice:
411      - remove legacy branch code.
412      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
413    o verification/*/code*/SEAICE_OPTIONS.h:
414      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
415        SEAICE_CAP_HEFF).
416    o pkg/cheapaml:
417      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
418        to load new forcing fields.
419      - add missing "_d 0" where it's needed; + some editing (improve indentation).
420      - remove switch to "-r8" compiler option (no longer needed) in verification
421        cheapAML_box, keep same output (small trucation error differences).
422    o verification/offline_exf_seaice:
423      - add thermodynamics only test.
424    o verification/cheapAML_box:
425      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
426        keep same output (same 14 digits for cg2d).
427      - switch on "-r8" compiler option (some numerical values are missing
428        the "_d 0") and update output (only 6 digits for cg2d were preserved).
429    
430    checkpoint64b (2012/12/24)
431    o pkg/cheapaml:
432      - remove un-used variables (Qnet,EmPmR) from pickup files.
433      - store tendency of advected variables into cheapaml pickup file
434        and fix the AB-2 restart.
435    o verification/offline_exf_seaice and lab_sea adjoint:
436      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
437      - switch to 4 time steps in offline, consistent with lab_sea.
438      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
439      - update results after change of experiment seaice.
440    o pkg/seaice:
441      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
442        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
443        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
444        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
445    o model/src:
446      - add run-time parameter to select CG2D solver minimum-residual solution
447        (in case of a poor convergence).
448    o pkg/seaice/seaice_lsr.F
449      - move calculation of matrix coefficients into new
450        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
451        file; the main purpose of this change is to be able to reuse the code
452        in S/R SEAICE_PRECONDITIONER
453      - modify the computation of the residual so that the mass of sea-ice
454        is not used twice; this simplifies the calculations, but since
455        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
456        not tested in testreport---this does not affect the testreport results.
457    o verification/seaice_obcs:
458      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
459        verification/lab_sea/input.salt_plume; changes results/output.txt*
460    o model/src:
461      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
462    o pkg/seaice:
463      - improve description of parameters in seaice_fgmres.F and start
464        cleaning up the code
465      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
466        second argument
467      - add a metric based on grid cell area to SEAICE_SCALPROD; update
468        results of offline_exf_seaice.dyn_jfnk
469      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
470    o pkg/aim_v23:
471      - fix an other bug in dissipation heating (grid-cell area was missing).
472    o model/src + pkg/seaice:
473      - add global (multi-tile) linear solver for pair of tri-diagonal system
474        along X and Y lines, respectively for U and V component.
475        Note: 1) MPI and cube-exchange not yet coded.
476            2) probably not accurate for poorly conditioned / large size problem.
477      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
478        default: not compiled and not used.
479    o pkg/seaice:
480      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
481        introduce bi/bj loops and use global_sum_tile_rl instead of
482        mpi_allreduce in seaice_fgmres.F
483      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
484      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
485      - add a verification experiment for JFNK in offline_exf_seaice
486    o verification:
487      - change (for now, only fwd test) offline_exf_seaice experiment:
488        use a re-entrant channel with idealized coastline (trapezoidal shape)
489        at southern boundary to explore seaice dynamics and thermodynamics
490        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
491        secondary test (input.thsice) use thermodynamics only with SST relaxation.
492      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
493    o pkg/exf:
494      - disable "sstExtrapol" when Nr=1
495    o verification:
496      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
497        to test pkg/cheapaml.
498    o pkg/aim_v23 & pkg/shap_filt:
499      - fix dissipation heating (erroneous gravity multiplication factor).
500    o pkg/seaice:
501      - remove unused field pressPre from jfnk solver
502      - rename two subroutines in seaice_preconditioner.F
503    o eesupp/src:
504       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
505    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
506       - remove wrong parts of the rhs and the lhs (were in there
507         because I did not understand the concept of this preconditioner)
508       - add an exchange between u- and v-sweep. This increases communication
509         by a factor of two but improves the convergence of jfnk. Ideally,
510         one would like the u- and v-sweep to be independent. So far within
511         undocumented ifdefs
512       - reorganize the extra computations for printing the residuals
513    o tools/genmake2:
514      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
515        since it's not necessary (and was preventing to use MNC in some cases).
516    
517    checkpoint64a (2012/11/16)
518    o pkg/autodiff:
519      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
520        autodiff_readparms.F no longer depends on calling order (within
521        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
522        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
523        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
524    o pkg/obcs:
525      - adding tidal velocity forcing capability to obcs
526        for usage example, see verification/seaice_obcs/input.tides
527    o pkg/seaice:
528      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
529        SEAICE_LSRrelaxU/V
530      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
531    o pkg/aim_v23:
532      - implement heating from friction (bottom friction and stratospheric drag).
533    o pkg/shap_filt:
534      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
535        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
536    o model/src:
537      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
538        time-constant addMass field from file (addMassFile);
539      - support for heating due to friction (and Kinetic Energy dissipation):
540        add option, run-time switch and 3-D field array + support code ; each pkg
541        or S/R can add heating contribution (if there is a sink of KE); the sum is
542        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
543    o pkg/seaice:
544      - complete merge of ITD code into seaice_growth.F
545        from MITgcm_contrib/torge/itd/code/
546        no verification so far, but Torge Martin tested
547        "1-D test case and Beaufort set up;
548        deliver okay results after 1 model year."
549      - complete merge of SEAICE_SIZE.h into all relevant routines
550      - move computation of eta at Z-points into calc_viscosities
551        + introduce global field etaZ
552        + add different methods for computing etaZ, for now the old
553          method (simple averages of eta to Z-points) is hardwired
554        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
555          seaice_preconditioner
556      - simplify computations for SEAICE_ZETA_SMOOTHREG
557      - seaice_preconditioner:
558        + replace one remaining press by pressLoc (mistake)
559        + adjust printing of residuals
560      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
561        + add (SEAICE.h) and rename some counters (initiliased in
562          seaice_init_fixed.F)
563        + add _BEGIN/END_MASTER (myThid)  around print statements
564        + print total number of iterations and failures over SEAICE_monFreq
565          interval to STDOUT
566      - move control over output-messages by fgmres to seaice_jfnk to save
567        some operations
568      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
569        in order to make restarts with sol .ne. zero (fgmres with restarts)
570        (seaice_jfnk.F, seaice_fgmres.F)
571      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
572        a serious convergence problem when open boundaries are involved
573    o pkg/ggl90: fix computation of control volumes for the case of
574      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
575      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
576    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
577    o pkg/autodiff
578      - Add inAdMode switch for SEAICEuseDYNAMICS:
579        SEAICEuseDYNAMICSinAdMode
580        (extend logic in ADAUTODIFF_INADMODE_SET)
581    o pkg/seaice
582      - Step 1 of merging ice-thickness distribution (ITD) code from
583        MITgcm_contrib/torge/itd/ (author: Torge Martin)
584        The code implements concept laid out in Thorndike et al. (1975);
585        code is enabled via CPP flag SEAICE_ITD
586        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
587        code is not complete yet!!
588      - SEAICE_SIZE.h now included in almost all seaice routines
589    o verification (using seaice):
590      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
591        global_ocean.cs32x15.seaice ; update results.
592      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
593      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
594        offline_exf_seaice (previously compiling B-grid).
595    o pkg/exf:
596      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
597        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
598        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
599  o pkg/layers (adjust changes from Sept 19):  o pkg/layers (adjust changes from Sept 19):
600    - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)    - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
601      this allows to remove "layers_maxNum" dimension from all layers arrays.      this allows to remove "layers_maxNum" dimension from all layers arrays.

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