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revision 1.1743 by mlosch, Mon Sep 24 15:07:38 2012 UTC revision 1.1885 by dgoldberg, Mon Jun 24 21:38:09 2013 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o verification/halfpipe_streamice:
8      - found a bug in s/r pkg/streamice/streamice_advect_thickness which caused
9        flux input boundary conditions to be ignored; a fix for this bug changed
10        verification results for forward test
11    o pkg/ptracers:
12      - allow to restart without SOM pickup (resetting SOM to zero).
13    o pkg/gmredi:
14      - New parameterisation for the calculation of K and (GM_PsiX,GM_PsiY) added.
15      - It uses mixing length theory and suppression by steering level effects to
16        calculate a diffusivity used in the Redi tensor (see Bates et al., submitted
17        to JPO, for more details).
18      - It also uses the diffusivity to calculate an eddy induced streamfunction
19        based on a PV closure (rather than a buoyancy closure as in GM).
20      - New files added to pkg/gmredi:
21        gmredi_k3d.F calculates the diffusivity for the Redi tensor and the eddy
22          induced overturning streamfunction (called from gmredi_calc_tensor)
23        gmredi_calc_eigs.F calculates the eigenvalues and eigenvectors required
24          for use in gmredi_k3d
25        gmredi_calc_urms.F calculates the the rms eddy velocity used to calculate
26          the eddy diffusivity
27    
28    checkpoint64i (2013/06/18)
29    o pkg/cheapaml:
30      - take src files from MITgcm_contrib/verification_other/offline_cheapaml/code
31        that enable the use of seaice (pkg/thsice thermo & pkg/seaice dynamics)
32        with pkg/cheapaml.
33    o utils/python: add subpackage for cubed sphere function, first example is
34        simple cs.pcol to plot 2D fields on a map
35    o pkg/streamice:
36      - This is a new package in MITgcm, which solves dynamic equations for ice
37         sheets and ice streams
38      - At the moment it is independent of atmosphere/ocean dynamics, or any
39        other physical packages in MITgcm, even ShelfIce (although it is anticipat-
40        ed that this will change)
41      - There is a new verification exercise that tests it, halfpipe_streamice,
42        evolves a 40x80 km ice stream/ice shelf (at coarse resolution) in a
43        rectangular embayment
44      - halfpipe_streamice is forward-only for now, will have TAF test soon
45      - for questions, email dgoldber@mit.edu
46    o pkg/thsice:
47      - fix filling of snow-precip diagnostic (SIsnwPrc) (left from the removing
48        of snowPrc from common bloc, on May 2nd, thsice_step_fwd.F revision 1.40);
49      - remove diagnostics 'SI_FrcFx' ( now identical to 'SI_Fract' with new
50         call sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect );
51      - allow precip from pkg/cheapaml to make snow over seaice.
52    o pkg/cfc:
53      - move in separated header file (CFC_ATMOS.h) time-serie arrays of Atmos CFC
54      - remove atmos CFC 2-D arrays from common bloc (now local variables)
55      - change some hard-coded constant to run time parameter for reading and
56        and interpolating atmospheric CFC ; keep same default as previously.
57      - more flexible reading of Atmos CFC (number of records no longer hard-coded)
58      - put arguments in standard order: myTime, myIter, myThid
59      - use standard S/R GET_PERIODIC_INTERVAL for time interpolation of
60        atmospheric CFC ; fix for the case myIter < PTRACERS_iter0.
61      - fix calculation of surf tendencys for partial-cell and/or Non-Lin Free-Surf
62      - new routine to print summary of CFC params and check for consistency.
63    o pkg/seaice: add uice/vice to the parameter list of s/r seaice_advdiff,
64      similar to thsice_advdiff.
65      Note that for the B-grid case the routine parameters uc/vc are overwritten.
66    o pkg/cfc:
67      - change time interpolation for atmospheric CFC-11 (now same as for CFC-12);
68        update output (CFC-11) of experiment cfc_example and tutorial_cfc_offline.
69      - fix interpolation of atmphspheric CFC between Sorthern and Northern
70        hemisphere value.
71    o pkg/seaice:
72      - allow to use seaice dynamics without pkg/exf (e.g., using pkg/cheapaml)
73    o pkg/seaice: add Adams-Bashforth2 time discretization for ice dynamics;
74                  so far only for JFNK-solver, turn on with SEAICEuseAB2 = .TRUE.
75      - requires an additional time level that is stored in the pickup
76      - you can start with AB2 from a pickup without this time level with
77        pickupStrictlyMatch = .false.
78    
79    checkpoint64h (2013/05/26)
80    o pkg/cheapaml:
81      - replace one ()**.5 with SQRT + use temp var "cdu = tau/Du" (coare3_flux);
82        affect machine truncation (but exp cheapAML_box still pass with 13 digits).
83      - consistent treatment of uWind,vWind location: assume everywhere in
84        pkg/cheapaml that they are on C-grid (@ uVel,vVel location)
85        (Note: was already the case for Tair,Qair advection);
86        add option (INCONSISTENT_WIND_LOCATION) to recover old results.
87      - compute diabatic forcing only in the interior (excluding overlap regions)
88      - fill in array "Qsw" (for short-wave heating);
89      - add diagnostic for precip ; fill-in diagnostics for cheapAML state vars
90        before any update (consistent with MITgcm state var diagnostics);
91      - cheapaml_fields_load.F & cheapaml_init_varia.F : only fill outer edges if
92        non periodic ; + adjusted for uWind,vWind (C-grid).
93    o pkg/seaice:
94      - remove dependence of pkg/seaice versus pkg/exf (file: pkg/pkg_depend) and
95        add explicitly pkg/exf in experiments that currently use pkg/seaice.
96      - allows to compile pkg/seaice without pkg/exf.
97    o tools/OAD_support:
98      - use a local copy (ourRWCPinBd) to ensure index ourRWCP stays within bounds
99        of array "ourStepOf" in function rvNextAction (revolve.F90).
100    o pkg/aim_compon_interf renamed to pkg/atm_compon_interf
101      - change pkg name (to be used with other atmospheric physics pkg)
102        but by-pass CVS when making the new pkg so that we keep the CVS history.
103    o pkg/offline:
104      - call OFFLINE_FIELDS_LOAD from pkg/offline/offline_init_varia.F
105        (previously called from pkg/dic_surfforcing_init.F)
106    o model/src:
107      - re-order sequence of calls within packages_init_variables.F, using
108        standard order, except for:
109         DIAGNOSTICS_INIT_VARIA and OFFLINE_INIT_VARIA (called @ the top),
110         CTRL_MAP_INI and OBCS_INIT_VARIABLES (called @ the bottom)
111    o new pkg: atm_phys
112      - add entry point and source code (previously in contrib
113          verification_other/atm_gray/code_gray/) for new pkg "atm_phys"
114        (atmospheric physics pkg from P. O'Gorman and T. Schneider, JCl, 2008).
115      - re-order sequence of calls within packages_readparms.F,
116         packages_init_fixed.F and packages_write_pickup.F
117        (but skip packages_init_variables.F because of TAF issues).
118      - update contrib/*/atm_gray/ experiment.
119    o pkg/seaice (ITD code):
120      - simplify and fix the writing of pickup-files for ITD case
121    o pkg/seaice (ITD code):
122      - introduce floe size dependent lateral melt for ITD case;
123      - cleaning (avoid division by zero, change to f77 syntax, remove tabs)
124      - update seaice_itd experiment main output.
125    o pkg/thsice:
126      - remove snowPrc from common block THSICE_FLUX, in THSICE_VARS.h and
127        declared it locally (without bi,bj) in thsice_main.F & aim_do_physics.F;
128        changed accordingly pkg/atm2d.
129    
130    checkpoint64g (2013/05/01)
131    o pkg/exf ALLOW_RUNOFTEMP
132      - if defined,  river and glacier runoff temperature can be read-in from
133        runoftempfile; runoftempfile needs to have same format as runofffile
134    o pkg/thsice (& pkg/bulk_force):
135      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
136        for energy content of Precip + RunOff & Evap (like with pkg/exf).
137      - change computation domain to always be the interior (without overlap).
138      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
139    o verification/tutorial_global_oce_biogeo:
140      - add preliminary OpenAD setup (still has problems)
141    o pkg/seaice:
142      - turn some parameters for choosing the convergence criterion of
143        the inexact Newton method (JFNK) into runtime parameters for convenience
144      - clean up seaice_calc_viscosities.F: remove/retire two options for
145        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
146        the results of lab_sea/input because a division has been replaced by
147        a multiplication with the reciprocal (sumNorm)
148      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
149        convergence of solver (changes results, of course), and to test some
150        new features
151    o model/src:
152      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
153      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
154      - move forcing adjustment (balancing surface forcing) in specific S/R
155        where might also be applied exchanges (if needed) to forcing arrays.
156    o pkg/shelfice:
157      - allow to specify the Ice-Shelf mass per unit area (instead of
158        shelficeLoadAnomaly) and do the conversion from one to the other
159      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
160        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
161        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
162        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
163      - update isomip experiment forward output (get machine truncation error
164        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
165    o verification/offline_exf_seaice:
166      revise data.seaice in input.thermo and input_ad and update results accordingly
167        HO = 0.2, SEAICE_areaLossFormula = 2,
168        SEAICE_growMeltByConv = .TRUE.,
169        SEAICE_doOpenWaterMelt = .TRUE.,
170      Improve consistency with input.thsice and fix the spurious 500m ice corners
171    o verification/global_ocean.cs32x15:
172      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
173        in icedyn (thsice+seaice-dyn) test and update output.
174    o verification/offline_exf_seaice:
175      - adjust list of tested variables (with testreport) and update
176        standard test output with better slection of monitored fields.
177    o pkg/cd_code:
178      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
179        experiment lab_sea.hb87
180    o tools/genmake2:
181      - change default makedepend from the system default to tools/xmakedepend:
182        When no makedepend is specified, select tools/xmakedepend it the test pass,
183        otherwise select the system default (if exist and pass the test) or
184        try to build cyrus-makedepend ; stop if none of the 3 works.
185    o pkg/exf & pkg/thsice:
186      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
187        for energy content of Precip + RunOff & Evap. Assumes:
188       1) Rain has same temp as Air.
189       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
190       3) Run-Off comes at the temp of surface water (with same Cp)
191       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
192        put directly into Latent Heat flux & should use water-vapor heat capacity.
193       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
194        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
195    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
196        (compile when SEAICE_ALLOW_JFNK is defined)
197    o pkg/thsice:
198      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
199        implementation): move THSICE_AVE call after the advection (called directly
200        from thsice_do_advect.F).
201    o verification/global_ocean.90x40x15 and OpenAD:
202      New experiment for OpenAD is identical to the one in input_ad except that
203        multiDimAdvection=.FALSE.,
204      There is still an issue with this.
205    o pkg/thsice:
206      - account for ice velocity (ocean relative velocity) in turbulent heat flux
207        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
208        and offline_exf_seaice (main test).
209    
210    checkpoint64f (2013/03/31)
211    o verification/OpenAD:
212      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
213    o verification/isomip, pkg/shelfice and OpenAD:
214      - add OpenAD setup to this exp and make shelfice package work with OpenAD
215    o verification/tutorial_global_oce_biogeo:
216      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
217    o verification/offline_exf_seaice:
218      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
219    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
220      - add OpenAD setup to this exp and make ptracers package work with OpenAD
221    o pkg/seaice/seaice_evp.F:
222       mask the asymmetric contribution of the ice-ocean stress (when
223       the turningAngle is non-zero) over open water to avoid stripes
224       in the EVP-solutions after many EVP-substeps. This does not change
225       the verification experiment (because turningAngle=0 in that experiment),
226       but will affect other EVP solutions with turningAngle.ne.0
227    o verification, AD & TLM output:
228      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
229        additions and multiplications which affect results at machine truncation
230        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
231        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
232        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
233        digits of matching.
234    o pkg/seaice:
235       modify lsr-algorithm so that it vectorizes AND converges by using a
236       "zebra" method: split vector loop into two with step size 2; this
237       solves a general convergence problem for the JFNK solver on a vector
238       computer. It has the potential to even improve convergence for
239       non-vector machines, but it does change the results so it is turned
240       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
241       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
242    
243    checkpoint64e (2013/03/05)
244    o pkg/ecco and several verification experiments:
245       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
246       from ecco package, and revert to unified routine in model/src/
247       Adjust verification experiments accordingly, especially gloal_oce_llc90
248       Should conclude long-standing work by Gael to reconsile the_main_loop with
249       ECCO and will enable OpenAD's revolve loop in ECCO setup.
250    o pkg/generic_advdiff:
251      - implement compressible flow method for multi-dim advection (similar to
252        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
253        TAF generates many recomputations) to use it; no yet coded with implicit
254        vertical advection.
255      - change experiment advect_cs (new output) and advect_xy (same output)
256        to test compressible flow multi-dim advection.
257    o pkg/generic_advdiff:
258      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
259        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
260    o pkg/seaice:
261      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
262        bug affects two verification experiments (lab_sea and lab_sea.hb87),
263        recover old (wrong) results by setting noSlipFac = 2. in
264        seaice_calc_strainrates.F;
265      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
266      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
267        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
268      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
269    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
270      - new subroutines seaice_lsr_tridiagu/v
271      - introduce loop bounds i/jmin/max to be able to use a restricted
272        additive Schwarz method, but not used for now.
273      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
274      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
275    o OpenAD support
276       Reorganize S/R call for overall time-stepping loop to facilitate
277       OpenAD revolve loop replacement
278       (new S/R main_do_loop.F)
279    o model/src:
280      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
281      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
282        ADAMS_BASHFORTH2.
283    o pkg/cheapaml:
284      - add new parameter (default=F, same as before) to disable full domain
285        (including land) periodicity in X & Y dir.
286      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
287        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
288        into single S/R CHEAPAML_TIMESTEP.
289    
290    checkpoint64d (2013/02/17)
291    o pkg/monitor (angular momentum):
292      - do not add Eta contribution to the total AM if using rigid-lid;
293      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
294      - horizontal discretisation: compute Zonal wind contribution separately for
295        each component (instead of from cell centered averaged) and use the 4
296        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
297      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
298        FreeSurf) if using vectorInvariant momentum.
299    o model/src (horizontal grid):
300      - move initialisation of all horizontal grid arrays to null value
301        from specific horizontal grid S/R to main S/R INI_GRID;
302      - add 2 new arrays to project model C-grid velocity on to zonal direction
303        (similar to AngleCosC & -AngleSinC but at U and V point location) and
304        compute them in S/R CALC_GRID_ANGLES.
305    o pkg/seaice: replace a hard coded parameter by a runtime parameter
306        SEAICE_JFNK_tolIter
307    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
308        preconditioner for JFNK (run LSR into the overlaps as far as possible,
309        i.e OLx/y-2, but overwrite the solution in the overlaps)
310      - extend loop range in seaice_calc_viscosity
311      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
312      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
313      - slightly modify loops in tridiagonal solver lsr-preconditioner
314      - by default remove the extra exchange in seaice_preconditioner with a
315        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
316      - modify offline_exf_seaice so that old results without RAS are reproduced
317        for output.dyn_jfnk.txt
318      in seaice_fgmres.F (unrelated to RAS)
319      - add a cpp-flag option for a re-ordered mapping (potentially more
320        efficient), but because this changes the results, turn it off by
321        default
322      - replace the save statement by local common blocks
323    o utils/matlab:
324      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
325      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
326        instead of local script "load_cs.m".
327    o pkg/seaice:
328      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
329        to the scalarProductMetric and the unrolling. By chance this does not
330        change the verification experiment, because of the particular domain
331        decomposition
332    o pkg/diagnostics:
333      - change default missing_value from UNSET_RL to -999.
334    o pkg/layers: improve vectorization of layers_fluxcalc.F
335      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
336        time spent in this routine by more than a factor of 3 on an NEC-SX8
337      - step 2: replace search algorithm by a bisection algorithm found in
338        Press et al. Numerical Recipes in Fortran. This algorithm can be
339        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
340        For now, use this algorithm only for TARGET_NEC_SX defined.
341      - moved the search algorithm into a separate subroutine, that is kept
342        within the same file for automatic inlining.
343      - modified catching potential errors
344    o pkg/ecco:
345      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
346    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
347      - modifications for ALLOW_GENTIM2D_CONTROL
348      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
349      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
350      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
351      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
352    o model/src:
353      - account for moist thermodynamics in (dry) potential temperature equation;
354        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
355        and cpl_aim+ocn.
356      - also switch to standard compiler (gfortran, was using ifort previously)
357        for fizhi-cs experiments reference output.
358    o pkg/ctrl:
359      - 1st step toward generic time-varying control variable (2D) via CPP option
360        ALLOW_GENTIM2D_CONTROL
361      - note new namelist ctrl_nml_genarr in data.ctrl
362    o verification/global_ocean.cs32x15:
363      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
364        thsice calling sequence and update "output.icedyn.txt" output file.
365    o pkg/ptracers:
366      - from Ryan A.: code to allow to restart a tracer at regular time interval
367        specifying a reset frequency and a reset-phase (for each tracers).
368    o pkg/thsice:
369      - implement new sequence of calls for thsice+seaice:
370          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
371          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
372      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
373        in CPP_OPTIONS.h) to recover old sequence;
374      - update diagnostics for Intermediate State thsice diagnostics: now filled
375        just before advection (instead of just after advection in old sequence);
376      - update output of experiment offline_exf_seaice (standard test);
377      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
378        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
379    o pkg/aim_v23:
380      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
381      - use standard pkg/mdsio routines to read & write CO2 pickup file;
382      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
383      - Implement new sequence of calls for seaice advection (with thsice and
384        seaice diffusion): do ice advection after ice-Thermodynamic (previously
385        was done before); change aim_do_physics.F (split the bi,bj loops block);
386      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
387    o pkg/thsice:
388      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
389        where just seaice diffusion is used without seaice-dynamics.
390    
391    checkpoint64c (2013/01/18)
392    o pkg/seaice:
393      - add a parameter JFNKres_tFac that can replace JFNKres_t
394        (= JFNKres_tFac*JFNKresidual before JFNK solver)
395      - add a line search option to the JFNK solver
396      - move update of u/vIce and computation of initial residual into a separate
397        routine (same file); makes the code a little easier to read (?)
398      - the line search requires computation of the residual and for some reason
399        I cannot do the update of u/vIce at the beginning of the Newton loop
400        without changing the results, so we move computation of the new residual
401        also to the end of the Newton loop, even without the line search
402    o pkg/mdsio:
403      - write missing value (corresponding to undefined array value) to meta files;
404        skip this if missing value is one (UNSET_RL would be a better value for the
405        case of undefined missing value but it's current the default missing-value);
406        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
407    o pkg/exf & thsice:
408      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
409        diagnostics) even when SHORTWAVE_HEATING is #undef;
410    o verification/cfc_example:
411      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
412        illustrate how to use it).
413    o verification/offline_exf_seaice:
414      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
415        files to only one time-record.
416      in input.thermo: narrow the 2 bands of low initial ice-concentration near
417        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
418        snapshot output; same mcPheePiston value as in thsice with
419        surf-current=0.2m/s.
420      in input.thsice: similar set-up as in input.thermo (channel with same seaice
421        initial conditions).
422    o verification/cfc_example:
423      - update file "data" with more standard choice (default rotationPeriod,
424        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
425        set deltaTFreeSurf to deltaTtracer) and update the output.
426    o pkg/layers:
427      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
428      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
429    o verification/offline_exf_seaice:
430      - set all {field}period to zero for constant-in-time forcing (not tested
431        anywhere else).
432    o verification/offline_exf_seaice:
433      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
434      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
435    o model/src:
436      - implement Finite-Volume method for (hydrostatic) presure gradient
437        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
438    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
439      - In order to be compatible with the default EVP code, this requires changing
440        the EVP code around a little; and because any small change immediately
441        breaks the lab_sea.hb87 verification experiment, the reference output is
442        updated two times (each time the remaining aggrement was only 2 digits):
443        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
444        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
445        The adjoint test lab_sea.evp also needed to be updated.
446      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
447        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
448        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
449        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
450        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
451        kept obscure, because I need to test it a little more.
452    o pkg/cheapaml:
453      - fix few incorrect type (_RL/_RS) in subroutine calls.
454    o pkg/seaice:
455      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
456        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
457    o model/src:
458      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
459        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
460        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
461    o pkg/cheapaml:
462      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
463        update output of experiment cheapAML_box.
464      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
465        and set them only in one place (cheapaml_readparms.F).
466      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
467      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
468        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
469    o model/src/the_main_loop.F:
470      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
471    o pkg/seaice:
472      - remove legacy branch code.
473      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
474    o verification/*/code*/SEAICE_OPTIONS.h:
475      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
476        SEAICE_CAP_HEFF).
477    o pkg/cheapaml:
478      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
479        to load new forcing fields.
480      - add missing "_d 0" where it's needed; + some editing (improve indentation).
481      - remove switch to "-r8" compiler option (no longer needed) in verification
482        cheapAML_box, keep same output (small trucation error differences).
483    o verification/offline_exf_seaice:
484      - add thermodynamics only test.
485    o verification/cheapAML_box:
486      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
487        keep same output (same 14 digits for cg2d).
488      - switch on "-r8" compiler option (some numerical values are missing
489        the "_d 0") and update output (only 6 digits for cg2d were preserved).
490    
491    checkpoint64b (2012/12/24)
492    o pkg/cheapaml:
493      - remove un-used variables (Qnet,EmPmR) from pickup files.
494      - store tendency of advected variables into cheapaml pickup file
495        and fix the AB-2 restart.
496    o verification/offline_exf_seaice and lab_sea adjoint:
497      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
498      - switch to 4 time steps in offline, consistent with lab_sea.
499      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
500      - update results after change of experiment seaice.
501    o pkg/seaice:
502      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
503        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
504        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
505        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
506    o model/src:
507      - add run-time parameter to select CG2D solver minimum-residual solution
508        (in case of a poor convergence).
509    o pkg/seaice/seaice_lsr.F
510      - move calculation of matrix coefficients into new
511        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
512        file; the main purpose of this change is to be able to reuse the code
513        in S/R SEAICE_PRECONDITIONER
514      - modify the computation of the residual so that the mass of sea-ice
515        is not used twice; this simplifies the calculations, but since
516        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
517        not tested in testreport---this does not affect the testreport results.
518    o verification/seaice_obcs:
519      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
520        verification/lab_sea/input.salt_plume; changes results/output.txt*
521    o model/src:
522      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
523    o pkg/seaice:
524      - improve description of parameters in seaice_fgmres.F and start
525        cleaning up the code
526      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
527        second argument
528      - add a metric based on grid cell area to SEAICE_SCALPROD; update
529        results of offline_exf_seaice.dyn_jfnk
530      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
531    o pkg/aim_v23:
532      - fix an other bug in dissipation heating (grid-cell area was missing).
533    o model/src + pkg/seaice:
534      - add global (multi-tile) linear solver for pair of tri-diagonal system
535        along X and Y lines, respectively for U and V component.
536        Note: 1) MPI and cube-exchange not yet coded.
537            2) probably not accurate for poorly conditioned / large size problem.
538      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
539        default: not compiled and not used.
540    o pkg/seaice:
541      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
542        introduce bi/bj loops and use global_sum_tile_rl instead of
543        mpi_allreduce in seaice_fgmres.F
544      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
545      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
546      - add a verification experiment for JFNK in offline_exf_seaice
547    o verification:
548      - change (for now, only fwd test) offline_exf_seaice experiment:
549        use a re-entrant channel with idealized coastline (trapezoidal shape)
550        at southern boundary to explore seaice dynamics and thermodynamics
551        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
552        secondary test (input.thsice) use thermodynamics only with SST relaxation.
553      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
554    o pkg/exf:
555      - disable "sstExtrapol" when Nr=1
556    o verification:
557      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
558        to test pkg/cheapaml.
559    o pkg/aim_v23 & pkg/shap_filt:
560      - fix dissipation heating (erroneous gravity multiplication factor).
561    o pkg/seaice:
562      - remove unused field pressPre from jfnk solver
563      - rename two subroutines in seaice_preconditioner.F
564    o eesupp/src:
565       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
566    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
567       - remove wrong parts of the rhs and the lhs (were in there
568         because I did not understand the concept of this preconditioner)
569       - add an exchange between u- and v-sweep. This increases communication
570         by a factor of two but improves the convergence of jfnk. Ideally,
571         one would like the u- and v-sweep to be independent. So far within
572         undocumented ifdefs
573       - reorganize the extra computations for printing the residuals
574    o tools/genmake2:
575      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
576        since it's not necessary (and was preventing to use MNC in some cases).
577    
578    checkpoint64a (2012/11/16)
579    o pkg/autodiff:
580      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
581        autodiff_readparms.F no longer depends on calling order (within
582        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
583        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
584        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
585    o pkg/obcs:
586      - adding tidal velocity forcing capability to obcs
587        for usage example, see verification/seaice_obcs/input.tides
588    o pkg/seaice:
589      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
590        SEAICE_LSRrelaxU/V
591      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
592    o pkg/aim_v23:
593      - implement heating from friction (bottom friction and stratospheric drag).
594    o pkg/shap_filt:
595      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
596        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
597    o model/src:
598      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
599        time-constant addMass field from file (addMassFile);
600      - support for heating due to friction (and Kinetic Energy dissipation):
601        add option, run-time switch and 3-D field array + support code ; each pkg
602        or S/R can add heating contribution (if there is a sink of KE); the sum is
603        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
604    o pkg/seaice:
605      - complete merge of ITD code into seaice_growth.F
606        from MITgcm_contrib/torge/itd/code/
607        no verification so far, but Torge Martin tested
608        "1-D test case and Beaufort set up;
609        deliver okay results after 1 model year."
610      - complete merge of SEAICE_SIZE.h into all relevant routines
611      - move computation of eta at Z-points into calc_viscosities
612        + introduce global field etaZ
613        + add different methods for computing etaZ, for now the old
614          method (simple averages of eta to Z-points) is hardwired
615        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
616          seaice_preconditioner
617      - simplify computations for SEAICE_ZETA_SMOOTHREG
618      - seaice_preconditioner:
619        + replace one remaining press by pressLoc (mistake)
620        + adjust printing of residuals
621      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
622        + add (SEAICE.h) and rename some counters (initiliased in
623          seaice_init_fixed.F)
624        + add _BEGIN/END_MASTER (myThid)  around print statements
625        + print total number of iterations and failures over SEAICE_monFreq
626          interval to STDOUT
627      - move control over output-messages by fgmres to seaice_jfnk to save
628        some operations
629      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
630        in order to make restarts with sol .ne. zero (fgmres with restarts)
631        (seaice_jfnk.F, seaice_fgmres.F)
632      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
633        a serious convergence problem when open boundaries are involved
634    o pkg/ggl90: fix computation of control volumes for the case of
635      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
636      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
637    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
638    o pkg/autodiff
639      - Add inAdMode switch for SEAICEuseDYNAMICS:
640        SEAICEuseDYNAMICSinAdMode
641        (extend logic in ADAUTODIFF_INADMODE_SET)
642    o pkg/seaice
643      - Step 1 of merging ice-thickness distribution (ITD) code from
644        MITgcm_contrib/torge/itd/ (author: Torge Martin)
645        The code implements concept laid out in Thorndike et al. (1975);
646        code is enabled via CPP flag SEAICE_ITD
647        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
648        code is not complete yet!!
649      - SEAICE_SIZE.h now included in almost all seaice routines
650    o verification (using seaice):
651      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
652        global_ocean.cs32x15.seaice ; update results.
653      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
654      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
655        offline_exf_seaice (previously compiling B-grid).
656    o pkg/exf:
657      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
658        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
659        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
660    o pkg/layers (adjust changes from Sept 19):
661      - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
662        this allows to remove "layers_maxNum" dimension from all layers arrays.
663    o pkg/layers (adjust changes from Sept 19):
664      - remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ;
665      - snap-shot extended to all type of layers (not just the 1rst type);
666      - remove layers variables when corresponding CPP option is undef.
667    o pkg/layers:
668      - rename pkg/layers variable and add new output (layer exist & un-weighted
669        velocity in layer)
670    o pkg/seaice:
671      - simplify (?) ocean-drag coefficent computations by using
672        the same routine in all three solvers (saves some code lines)
673      - remove global fields DRAGA and DRAGS from C-grid code and
674        declare them locally in lsr.F (the only place where they are
675        still used)
676      - update AD output of lab_sea.evp (very sensitive anyway).
677    o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
678      (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
679      and SEAICEuseJFNK=.true. A few things to note:
680      - involves a FGMRES, that is parallel but very inefficient,
681        because of many scalar products (global sums) in the Gram-Schmidt
682        orthogonalization method. Needs to be replaced. Original code
683        from J.-F. Lemieux
684      - preconditioner for FGMRES is a stripped down version of LSOR
685      - SOLV_MAX_ITERS is now used for LSOR as a solver and as a
686        preconditioner. For the preconditioner, the default is set to 10.
687      - Jacobian times vector is computed with finite differences
688      - marginally related to JFNK-solver: add a smooth regularization for
689        zeta with tanh that will improve convergence (Lemieux and Tremblay,
690        2009) for any implicit solver (not implemented for EVP because EVP
691        does not need this regularization in the first place). Define
692        SEAICE_ZETA_SMOOTHREG in SEAICE_OPTIONS.h to use.
693    o eesupp/src:
694      - check in genmake2 that intrinsic S/R flush is available.
695      - add S/R to flush IO unit (if intrinsic S/R flush is available)
696      - flush standard & error msg unit before MPI termination
697      - if debugMode, flush IO unit after printing msg
698    o pkg/ctrl:
699      - ctrl_unpack.F, ALLOW_GENARR3D_CONTROL code: fix missing argument in call
700        to ctrl_set_unpack_xyz.
701    
702    checkpoint64 (2012/10/09)
703    o pkg/shelfice
704      - in mom_fluxform.F, mom_vecinv.F:
705        CALL SHELFICE_V_DRAG(bi,bj,k,vFld,KE,KappaRU,vF,myThid)
706        Bug fix KappaRU -> KappaRV
707        does not change verification/isomip but may change other setups
708        (presumably constant KappaRU=KappaRV)
709      - fix diagnostics SHIU/Vdrag (thanks to Tom Millgate)
710    o pkg/obcs:
711      - fixed some indexing bugs in obcs_seaice_sponge.F
712      - added obcs relaxation subroutines for HSALT and HSNOW
713      - changes verification/seaice_obcs/results/obcs_seaice_sponge.F
714  o pkg/seaice:  o pkg/seaice:
715    - add "multicategory" parameterization for snow in analogy to ice,    - add "multicategory" parameterization for snow in analogy to ice,
716      default is off for now.      default is off for now.

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