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revision 1.1760 by mlosch, Tue Nov 6 12:31:30 2012 UTC revision 1.1882 by mlosch, Wed Jun 19 12:51:51 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/seaice/seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes  
8    a serious convergence problem when open boundaries are involved  checkpoint64i (2013/06/18)
9  o pkg/ggl90: fix computation of control volumes for the case of  o pkg/cheapaml:
10      - take src files from MITgcm_contrib/verification_other/offline_cheapaml/code
11        that enable the use of seaice (pkg/thsice thermo & pkg/seaice dynamics)
12        with pkg/cheapaml.
13    o utils/python: add subpackage for cubed sphere function, first example is
14        simple cs.pcol to plot 2D fields on a map
15    o pkg/streamice:
16      - This is a new package in MITgcm, which solves dynamic equations for ice
17         sheets and ice streams
18      - At the moment it is independent of atmosphere/ocean dynamics, or any
19        other physical packages in MITgcm, even ShelfIce (although it is anticipat-
20        ed that this will change)
21      - There is a new verification exercise that tests it, halfpipe_streamice,
22        evolves a 40x80 km ice stream/ice shelf (at coarse resolution) in a
23        rectangular embayment
24      - halfpipe_streamice is forward-only for now, will have TAF test soon
25      - for questions, email dgoldber@mit.edu
26    o pkg/thsice:
27      - fix filling of snow-precip diagnostic (SIsnwPrc) (left from the removing
28        of snowPrc from common bloc, on May 2nd, thsice_step_fwd.F revision 1.40);
29      - remove diagnostics 'SI_FrcFx' ( now identical to 'SI_Fract' with new
30         call sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect );
31      - allow precip from pkg/cheapaml to make snow over seaice.
32    o pkg/cfc:
33      - move in separated header file (CFC_ATMOS.h) time-serie arrays of Atmos CFC
34      - remove atmos CFC 2-D arrays from common bloc (now local variables)
35      - change some hard-coded constant to run time parameter for reading and
36        and interpolating atmospheric CFC ; keep same default as previously.
37      - more flexible reading of Atmos CFC (number of records no longer hard-coded)
38      - put arguments in standard order: myTime, myIter, myThid
39      - use standard S/R GET_PERIODIC_INTERVAL for time interpolation of
40        atmospheric CFC ; fix for the case myIter < PTRACERS_iter0.
41      - fix calculation of surf tendencys for partial-cell and/or Non-Lin Free-Surf
42      - new routine to print summary of CFC params and check for consistency.
43    o pkg/seaice: add uice/vice to the parameter list of s/r seaice_advdiff,
44      similar to thsice_advdiff.
45      Note that for the B-grid case the routine parameters uc/vc are overwritten.
46    o pkg/cfc:
47      - change time interpolation for atmospheric CFC-11 (now same as for CFC-12);
48        update output (CFC-11) of experiment cfc_example and tutorial_cfc_offline.
49      - fix interpolation of atmphspheric CFC between Sorthern and Northern
50        hemisphere value.
51    o pkg/seaice:
52      - allow to use seaice dynamics without pkg/exf (e.g., using pkg/cheapaml)
53    o pkg/seaice: add Adams-Bashforth2 time discretization for ice dynamics;
54                  so far only for JFNK-solver, turn on with SEAICEuseAB2 = .TRUE.
55      - requires an additional time level that is stored in the pickup
56      - you can start with AB2 from a pickup without this time level with
57        pickupStrictlyMatch = .false.
58    
59    checkpoint64h (2013/05/26)
60    o pkg/cheapaml:
61      - replace one ()**.5 with SQRT + use temp var "cdu = tau/Du" (coare3_flux);
62        affect machine truncation (but exp cheapAML_box still pass with 13 digits).
63      - consistent treatment of uWind,vWind location: assume everywhere in
64        pkg/cheapaml that they are on C-grid (@ uVel,vVel location)
65        (Note: was already the case for Tair,Qair advection);
66        add option (INCONSISTENT_WIND_LOCATION) to recover old results.
67      - compute diabatic forcing only in the interior (excluding overlap regions)
68      - fill in array "Qsw" (for short-wave heating);
69      - add diagnostic for precip ; fill-in diagnostics for cheapAML state vars
70        before any update (consistent with MITgcm state var diagnostics);
71      - cheapaml_fields_load.F & cheapaml_init_varia.F : only fill outer edges if
72        non periodic ; + adjusted for uWind,vWind (C-grid).
73    o pkg/seaice:
74      - remove dependence of pkg/seaice versus pkg/exf (file: pkg/pkg_depend) and
75        add explicitly pkg/exf in experiments that currently use pkg/seaice.
76      - allows to compile pkg/seaice without pkg/exf.
77    o tools/OAD_support:
78      - use a local copy (ourRWCPinBd) to ensure index ourRWCP stays within bounds
79        of array "ourStepOf" in function rvNextAction (revolve.F90).
80    o pkg/aim_compon_interf renamed to pkg/atm_compon_interf
81      - change pkg name (to be used with other atmospheric physics pkg)
82        but by-pass CVS when making the new pkg so that we keep the CVS history.
83    o pkg/offline:
84      - call OFFLINE_FIELDS_LOAD from pkg/offline/offline_init_varia.F
85        (previously called from pkg/dic_surfforcing_init.F)
86    o model/src:
87      - re-order sequence of calls within packages_init_variables.F, using
88        standard order, except for:
89         DIAGNOSTICS_INIT_VARIA and OFFLINE_INIT_VARIA (called @ the top),
90         CTRL_MAP_INI and OBCS_INIT_VARIABLES (called @ the bottom)
91    o new pkg: atm_phys
92      - add entry point and source code (previously in contrib
93          verification_other/atm_gray/code_gray/) for new pkg "atm_phys"
94        (atmospheric physics pkg from P. O'Gorman and T. Schneider, JCl, 2008).
95      - re-order sequence of calls within packages_readparms.F,
96         packages_init_fixed.F and packages_write_pickup.F
97        (but skip packages_init_variables.F because of TAF issues).
98      - update contrib/*/atm_gray/ experiment.
99    o pkg/seaice (ITD code):
100      - simplify and fix the writing of pickup-files for ITD case
101    o pkg/seaice (ITD code):
102      - introduce floe size dependent lateral melt for ITD case;
103      - cleaning (avoid division by zero, change to f77 syntax, remove tabs)
104      - update seaice_itd experiment main output.
105    o pkg/thsice:
106      - remove snowPrc from common block THSICE_FLUX, in THSICE_VARS.h and
107        declared it locally (without bi,bj) in thsice_main.F & aim_do_physics.F;
108        changed accordingly pkg/atm2d.
109    
110    checkpoint64g (2013/05/01)
111    o pkg/exf ALLOW_RUNOFTEMP
112      - if defined,  river and glacier runoff temperature can be read-in from
113        runoftempfile; runoftempfile needs to have same format as runofffile
114    o pkg/thsice (& pkg/bulk_force):
115      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
116        for energy content of Precip + RunOff & Evap (like with pkg/exf).
117      - change computation domain to always be the interior (without overlap).
118      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
119    o verification/tutorial_global_oce_biogeo:
120      - add preliminary OpenAD setup (still has problems)
121    o pkg/seaice:
122      - turn some parameters for choosing the convergence criterion of
123        the inexact Newton method (JFNK) into runtime parameters for convenience
124      - clean up seaice_calc_viscosities.F: remove/retire two options for
125        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
126        the results of lab_sea/input because a division has been replaced by
127        a multiplication with the reciprocal (sumNorm)
128      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
129        convergence of solver (changes results, of course), and to test some
130        new features
131    o model/src:
132      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
133      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
134      - move forcing adjustment (balancing surface forcing) in specific S/R
135        where might also be applied exchanges (if needed) to forcing arrays.
136    o pkg/shelfice:
137      - allow to specify the Ice-Shelf mass per unit area (instead of
138        shelficeLoadAnomaly) and do the conversion from one to the other
139      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
140        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
141        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
142        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
143      - update isomip experiment forward output (get machine truncation error
144        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
145    o verification/offline_exf_seaice:
146      revise data.seaice in input.thermo and input_ad and update results accordingly
147        HO = 0.2, SEAICE_areaLossFormula = 2,
148        SEAICE_growMeltByConv = .TRUE.,
149        SEAICE_doOpenWaterMelt = .TRUE.,
150      Improve consistency with input.thsice and fix the spurious 500m ice corners
151    o verification/global_ocean.cs32x15:
152      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
153        in icedyn (thsice+seaice-dyn) test and update output.
154    o verification/offline_exf_seaice:
155      - adjust list of tested variables (with testreport) and update
156        standard test output with better slection of monitored fields.
157    o pkg/cd_code:
158      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
159        experiment lab_sea.hb87
160    o tools/genmake2:
161      - change default makedepend from the system default to tools/xmakedepend:
162        When no makedepend is specified, select tools/xmakedepend it the test pass,
163        otherwise select the system default (if exist and pass the test) or
164        try to build cyrus-makedepend ; stop if none of the 3 works.
165    o pkg/exf & pkg/thsice:
166      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
167        for energy content of Precip + RunOff & Evap. Assumes:
168       1) Rain has same temp as Air.
169       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
170       3) Run-Off comes at the temp of surface water (with same Cp)
171       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
172        put directly into Latent Heat flux & should use water-vapor heat capacity.
173       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
174        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
175    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
176        (compile when SEAICE_ALLOW_JFNK is defined)
177    o pkg/thsice:
178      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
179        implementation): move THSICE_AVE call after the advection (called directly
180        from thsice_do_advect.F).
181    o verification/global_ocean.90x40x15 and OpenAD:
182      New experiment for OpenAD is identical to the one in input_ad except that
183        multiDimAdvection=.FALSE.,
184      There is still an issue with this.
185    o pkg/thsice:
186      - account for ice velocity (ocean relative velocity) in turbulent heat flux
187        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
188        and offline_exf_seaice (main test).
189    
190    checkpoint64f (2013/03/31)
191    o verification/OpenAD:
192      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
193    o verification/isomip, pkg/shelfice and OpenAD:
194      - add OpenAD setup to this exp and make shelfice package work with OpenAD
195    o verification/tutorial_global_oce_biogeo:
196      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
197    o verification/offline_exf_seaice:
198      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
199    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
200      - add OpenAD setup to this exp and make ptracers package work with OpenAD
201    o pkg/seaice/seaice_evp.F:
202       mask the asymmetric contribution of the ice-ocean stress (when
203       the turningAngle is non-zero) over open water to avoid stripes
204       in the EVP-solutions after many EVP-substeps. This does not change
205       the verification experiment (because turningAngle=0 in that experiment),
206       but will affect other EVP solutions with turningAngle.ne.0
207    o verification, AD & TLM output:
208      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
209        additions and multiplications which affect results at machine truncation
210        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
211        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
212        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
213        digits of matching.
214    o pkg/seaice:
215       modify lsr-algorithm so that it vectorizes AND converges by using a
216       "zebra" method: split vector loop into two with step size 2; this
217       solves a general convergence problem for the JFNK solver on a vector
218       computer. It has the potential to even improve convergence for
219       non-vector machines, but it does change the results so it is turned
220       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
221       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
222    
223    checkpoint64e (2013/03/05)
224    o pkg/ecco and several verification experiments:
225       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
226       from ecco package, and revert to unified routine in model/src/
227       Adjust verification experiments accordingly, especially gloal_oce_llc90
228       Should conclude long-standing work by Gael to reconsile the_main_loop with
229       ECCO and will enable OpenAD's revolve loop in ECCO setup.
230    o pkg/generic_advdiff:
231      - implement compressible flow method for multi-dim advection (similar to
232        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
233        TAF generates many recomputations) to use it; no yet coded with implicit
234        vertical advection.
235      - change experiment advect_cs (new output) and advect_xy (same output)
236        to test compressible flow multi-dim advection.
237    o pkg/generic_advdiff:
238      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
239        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
240    o pkg/seaice:
241      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
242        bug affects two verification experiments (lab_sea and lab_sea.hb87),
243        recover old (wrong) results by setting noSlipFac = 2. in
244        seaice_calc_strainrates.F;
245      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
246      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
247        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
248      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
249    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
250      - new subroutines seaice_lsr_tridiagu/v
251      - introduce loop bounds i/jmin/max to be able to use a restricted
252        additive Schwarz method, but not used for now.
253      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
254      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
255    o OpenAD support
256       Reorganize S/R call for overall time-stepping loop to facilitate
257       OpenAD revolve loop replacement
258       (new S/R main_do_loop.F)
259    o model/src:
260      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
261      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
262        ADAMS_BASHFORTH2.
263    o pkg/cheapaml:
264      - add new parameter (default=F, same as before) to disable full domain
265        (including land) periodicity in X & Y dir.
266      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
267        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
268        into single S/R CHEAPAML_TIMESTEP.
269    
270    checkpoint64d (2013/02/17)
271    o pkg/monitor (angular momentum):
272      - do not add Eta contribution to the total AM if using rigid-lid;
273      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
274      - horizontal discretisation: compute Zonal wind contribution separately for
275        each component (instead of from cell centered averaged) and use the 4
276        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
277      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
278        FreeSurf) if using vectorInvariant momentum.
279    o model/src (horizontal grid):
280      - move initialisation of all horizontal grid arrays to null value
281        from specific horizontal grid S/R to main S/R INI_GRID;
282      - add 2 new arrays to project model C-grid velocity on to zonal direction
283        (similar to AngleCosC & -AngleSinC but at U and V point location) and
284        compute them in S/R CALC_GRID_ANGLES.
285    o pkg/seaice: replace a hard coded parameter by a runtime parameter
286        SEAICE_JFNK_tolIter
287    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
288        preconditioner for JFNK (run LSR into the overlaps as far as possible,
289        i.e OLx/y-2, but overwrite the solution in the overlaps)
290      - extend loop range in seaice_calc_viscosity
291      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
292      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
293      - slightly modify loops in tridiagonal solver lsr-preconditioner
294      - by default remove the extra exchange in seaice_preconditioner with a
295        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
296      - modify offline_exf_seaice so that old results without RAS are reproduced
297        for output.dyn_jfnk.txt
298      in seaice_fgmres.F (unrelated to RAS)
299      - add a cpp-flag option for a re-ordered mapping (potentially more
300        efficient), but because this changes the results, turn it off by
301        default
302      - replace the save statement by local common blocks
303    o utils/matlab:
304      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
305      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
306        instead of local script "load_cs.m".
307    o pkg/seaice:
308      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
309        to the scalarProductMetric and the unrolling. By chance this does not
310        change the verification experiment, because of the particular domain
311        decomposition
312    o pkg/diagnostics:
313      - change default missing_value from UNSET_RL to -999.
314    o pkg/layers: improve vectorization of layers_fluxcalc.F
315      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
316        time spent in this routine by more than a factor of 3 on an NEC-SX8
317      - step 2: replace search algorithm by a bisection algorithm found in
318        Press et al. Numerical Recipes in Fortran. This algorithm can be
319        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
320        For now, use this algorithm only for TARGET_NEC_SX defined.
321      - moved the search algorithm into a separate subroutine, that is kept
322        within the same file for automatic inlining.
323      - modified catching potential errors
324    o pkg/ecco:
325      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
326    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
327      - modifications for ALLOW_GENTIM2D_CONTROL
328      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
329      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
330      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
331      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
332    o model/src:
333      - account for moist thermodynamics in (dry) potential temperature equation;
334        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
335        and cpl_aim+ocn.
336      - also switch to standard compiler (gfortran, was using ifort previously)
337        for fizhi-cs experiments reference output.
338    o pkg/ctrl:
339      - 1st step toward generic time-varying control variable (2D) via CPP option
340        ALLOW_GENTIM2D_CONTROL
341      - note new namelist ctrl_nml_genarr in data.ctrl
342    o verification/global_ocean.cs32x15:
343      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
344        thsice calling sequence and update "output.icedyn.txt" output file.
345    o pkg/ptracers:
346      - from Ryan A.: code to allow to restart a tracer at regular time interval
347        specifying a reset frequency and a reset-phase (for each tracers).
348    o pkg/thsice:
349      - implement new sequence of calls for thsice+seaice:
350          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
351          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
352      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
353        in CPP_OPTIONS.h) to recover old sequence;
354      - update diagnostics for Intermediate State thsice diagnostics: now filled
355        just before advection (instead of just after advection in old sequence);
356      - update output of experiment offline_exf_seaice (standard test);
357      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
358        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
359    o pkg/aim_v23:
360      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
361      - use standard pkg/mdsio routines to read & write CO2 pickup file;
362      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
363      - Implement new sequence of calls for seaice advection (with thsice and
364        seaice diffusion): do ice advection after ice-Thermodynamic (previously
365        was done before); change aim_do_physics.F (split the bi,bj loops block);
366      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
367    o pkg/thsice:
368      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
369        where just seaice diffusion is used without seaice-dynamics.
370    
371    checkpoint64c (2013/01/18)
372    o pkg/seaice:
373      - add a parameter JFNKres_tFac that can replace JFNKres_t
374        (= JFNKres_tFac*JFNKresidual before JFNK solver)
375      - add a line search option to the JFNK solver
376      - move update of u/vIce and computation of initial residual into a separate
377        routine (same file); makes the code a little easier to read (?)
378      - the line search requires computation of the residual and for some reason
379        I cannot do the update of u/vIce at the beginning of the Newton loop
380        without changing the results, so we move computation of the new residual
381        also to the end of the Newton loop, even without the line search
382    o pkg/mdsio:
383      - write missing value (corresponding to undefined array value) to meta files;
384        skip this if missing value is one (UNSET_RL would be a better value for the
385        case of undefined missing value but it's current the default missing-value);
386        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
387    o pkg/exf & thsice:
388      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
389        diagnostics) even when SHORTWAVE_HEATING is #undef;
390    o verification/cfc_example:
391      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
392        illustrate how to use it).
393    o verification/offline_exf_seaice:
394      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
395        files to only one time-record.
396      in input.thermo: narrow the 2 bands of low initial ice-concentration near
397        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
398        snapshot output; same mcPheePiston value as in thsice with
399        surf-current=0.2m/s.
400      in input.thsice: similar set-up as in input.thermo (channel with same seaice
401        initial conditions).
402    o verification/cfc_example:
403      - update file "data" with more standard choice (default rotationPeriod,
404        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
405        set deltaTFreeSurf to deltaTtracer) and update the output.
406    o pkg/layers:
407      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
408      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
409    o verification/offline_exf_seaice:
410      - set all {field}period to zero for constant-in-time forcing (not tested
411        anywhere else).
412    o verification/offline_exf_seaice:
413      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
414      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
415    o model/src:
416      - implement Finite-Volume method for (hydrostatic) presure gradient
417        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
418    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
419      - In order to be compatible with the default EVP code, this requires changing
420        the EVP code around a little; and because any small change immediately
421        breaks the lab_sea.hb87 verification experiment, the reference output is
422        updated two times (each time the remaining aggrement was only 2 digits):
423        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
424        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
425        The adjoint test lab_sea.evp also needed to be updated.
426      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
427        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
428        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
429        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
430        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
431        kept obscure, because I need to test it a little more.
432    o pkg/cheapaml:
433      - fix few incorrect type (_RL/_RS) in subroutine calls.
434    o pkg/seaice:
435      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
436        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
437    o model/src:
438      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
439        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
440        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
441    o pkg/cheapaml:
442      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
443        update output of experiment cheapAML_box.
444      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
445        and set them only in one place (cheapaml_readparms.F).
446      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
447      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
448        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
449    o model/src/the_main_loop.F:
450      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
451    o pkg/seaice:
452      - remove legacy branch code.
453      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
454    o verification/*/code*/SEAICE_OPTIONS.h:
455      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
456        SEAICE_CAP_HEFF).
457    o pkg/cheapaml:
458      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
459        to load new forcing fields.
460      - add missing "_d 0" where it's needed; + some editing (improve indentation).
461      - remove switch to "-r8" compiler option (no longer needed) in verification
462        cheapAML_box, keep same output (small trucation error differences).
463    o verification/offline_exf_seaice:
464      - add thermodynamics only test.
465    o verification/cheapAML_box:
466      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
467        keep same output (same 14 digits for cg2d).
468      - switch on "-r8" compiler option (some numerical values are missing
469        the "_d 0") and update output (only 6 digits for cg2d were preserved).
470    
471    checkpoint64b (2012/12/24)
472    o pkg/cheapaml:
473      - remove un-used variables (Qnet,EmPmR) from pickup files.
474      - store tendency of advected variables into cheapaml pickup file
475        and fix the AB-2 restart.
476    o verification/offline_exf_seaice and lab_sea adjoint:
477      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
478      - switch to 4 time steps in offline, consistent with lab_sea.
479      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
480      - update results after change of experiment seaice.
481    o pkg/seaice:
482      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
483        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
484        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
485        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
486    o model/src:
487      - add run-time parameter to select CG2D solver minimum-residual solution
488        (in case of a poor convergence).
489    o pkg/seaice/seaice_lsr.F
490      - move calculation of matrix coefficients into new
491        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
492        file; the main purpose of this change is to be able to reuse the code
493        in S/R SEAICE_PRECONDITIONER
494      - modify the computation of the residual so that the mass of sea-ice
495        is not used twice; this simplifies the calculations, but since
496        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
497        not tested in testreport---this does not affect the testreport results.
498    o verification/seaice_obcs:
499      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
500        verification/lab_sea/input.salt_plume; changes results/output.txt*
501    o model/src:
502      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
503    o pkg/seaice:
504      - improve description of parameters in seaice_fgmres.F and start
505        cleaning up the code
506      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
507        second argument
508      - add a metric based on grid cell area to SEAICE_SCALPROD; update
509        results of offline_exf_seaice.dyn_jfnk
510      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
511    o pkg/aim_v23:
512      - fix an other bug in dissipation heating (grid-cell area was missing).
513    o model/src + pkg/seaice:
514      - add global (multi-tile) linear solver for pair of tri-diagonal system
515        along X and Y lines, respectively for U and V component.
516        Note: 1) MPI and cube-exchange not yet coded.
517            2) probably not accurate for poorly conditioned / large size problem.
518      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
519        default: not compiled and not used.
520    o pkg/seaice:
521      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
522        introduce bi/bj loops and use global_sum_tile_rl instead of
523        mpi_allreduce in seaice_fgmres.F
524      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
525      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
526      - add a verification experiment for JFNK in offline_exf_seaice
527    o verification:
528      - change (for now, only fwd test) offline_exf_seaice experiment:
529        use a re-entrant channel with idealized coastline (trapezoidal shape)
530        at southern boundary to explore seaice dynamics and thermodynamics
531        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
532        secondary test (input.thsice) use thermodynamics only with SST relaxation.
533      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
534    o pkg/exf:
535      - disable "sstExtrapol" when Nr=1
536    o verification:
537      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
538        to test pkg/cheapaml.
539    o pkg/aim_v23 & pkg/shap_filt:
540      - fix dissipation heating (erroneous gravity multiplication factor).
541    o pkg/seaice:
542      - remove unused field pressPre from jfnk solver
543      - rename two subroutines in seaice_preconditioner.F
544    o eesupp/src:
545       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
546    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
547       - remove wrong parts of the rhs and the lhs (were in there
548         because I did not understand the concept of this preconditioner)
549       - add an exchange between u- and v-sweep. This increases communication
550         by a factor of two but improves the convergence of jfnk. Ideally,
551         one would like the u- and v-sweep to be independent. So far within
552         undocumented ifdefs
553       - reorganize the extra computations for printing the residuals
554    o tools/genmake2:
555      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
556        since it's not necessary (and was preventing to use MNC in some cases).
557    
558    checkpoint64a (2012/11/16)
559    o pkg/autodiff:
560      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
561        autodiff_readparms.F no longer depends on calling order (within
562        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
563        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
564        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
565    o pkg/obcs:
566      - adding tidal velocity forcing capability to obcs
567        for usage example, see verification/seaice_obcs/input.tides
568    o pkg/seaice:
569      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
570        SEAICE_LSRrelaxU/V
571      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
572    o pkg/aim_v23:
573      - implement heating from friction (bottom friction and stratospheric drag).
574    o pkg/shap_filt:
575      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
576        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
577    o model/src:
578      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
579        time-constant addMass field from file (addMassFile);
580      - support for heating due to friction (and Kinetic Energy dissipation):
581        add option, run-time switch and 3-D field array + support code ; each pkg
582        or S/R can add heating contribution (if there is a sink of KE); the sum is
583        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
584    o pkg/seaice:
585      - complete merge of ITD code into seaice_growth.F
586        from MITgcm_contrib/torge/itd/code/
587        no verification so far, but Torge Martin tested
588        "1-D test case and Beaufort set up;
589        deliver okay results after 1 model year."
590      - complete merge of SEAICE_SIZE.h into all relevant routines
591      - move computation of eta at Z-points into calc_viscosities
592        + introduce global field etaZ
593        + add different methods for computing etaZ, for now the old
594          method (simple averages of eta to Z-points) is hardwired
595        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
596          seaice_preconditioner
597      - simplify computations for SEAICE_ZETA_SMOOTHREG
598      - seaice_preconditioner:
599        + replace one remaining press by pressLoc (mistake)
600        + adjust printing of residuals
601      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
602        + add (SEAICE.h) and rename some counters (initiliased in
603          seaice_init_fixed.F)
604        + add _BEGIN/END_MASTER (myThid)  around print statements
605        + print total number of iterations and failures over SEAICE_monFreq
606          interval to STDOUT
607      - move control over output-messages by fgmres to seaice_jfnk to save
608        some operations
609      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
610        in order to make restarts with sol .ne. zero (fgmres with restarts)
611        (seaice_jfnk.F, seaice_fgmres.F)
612      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
613        a serious convergence problem when open boundaries are involved
614    o pkg/ggl90: fix computation of control volumes for the case of
615    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
616    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)
617  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
618  o pkg/autodiff  o pkg/autodiff
619    - Add inAdMode switch for SEAICEuseDYNAMICS:    - Add inAdMode switch for SEAICEuseDYNAMICS:
620      SEAICEuseDYNAMICSinAdMode      SEAICEuseDYNAMICSinAdMode
621      (extend logic in ADAUTODIFF_INADMODE_SET)      (extend logic in ADAUTODIFF_INADMODE_SET)
622  o pkg/seaice  o pkg/seaice
623    - Step 1 of merging ice-thickness distribution (ITD) code from    - Step 1 of merging ice-thickness distribution (ITD) code from

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