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revision 1.1760 by mlosch, Tue Nov 6 12:31:30 2012 UTC revision 1.1884 by jmc, Fri Jun 21 22:17:00 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  o pkg/ptracers:
8    a serious convergence problem when open boundaries are involved    - allow to restart without SOM pickup (resetting SOM to zero).
9  o pkg/ggl90: fix computation of control volumes for the case of  o pkg/gmredi:
10      - New parameterisation for the calculation of K and (GM_PsiX,GM_PsiY) added.
11      - It uses mixing length theory and suppression by steering level effects to
12        calculate a diffusivity used in the Redi tensor (see Bates et al., submitted
13        to JPO, for more details).
14      - It also uses the diffusivity to calculate an eddy induced streamfunction
15        based on a PV closure (rather than a buoyancy closure as in GM).
16      - New files added to pkg/gmredi:
17        gmredi_k3d.F calculates the diffusivity for the Redi tensor and the eddy
18          induced overturning streamfunction (called from gmredi_calc_tensor)
19        gmredi_calc_eigs.F calculates the eigenvalues and eigenvectors required
20          for use in gmredi_k3d
21        gmredi_calc_urms.F calculates the the rms eddy velocity used to calculate
22          the eddy diffusivity
23    
24    checkpoint64i (2013/06/18)
25    o pkg/cheapaml:
26      - take src files from MITgcm_contrib/verification_other/offline_cheapaml/code
27        that enable the use of seaice (pkg/thsice thermo & pkg/seaice dynamics)
28        with pkg/cheapaml.
29    o utils/python: add subpackage for cubed sphere function, first example is
30        simple cs.pcol to plot 2D fields on a map
31    o pkg/streamice:
32      - This is a new package in MITgcm, which solves dynamic equations for ice
33         sheets and ice streams
34      - At the moment it is independent of atmosphere/ocean dynamics, or any
35        other physical packages in MITgcm, even ShelfIce (although it is anticipat-
36        ed that this will change)
37      - There is a new verification exercise that tests it, halfpipe_streamice,
38        evolves a 40x80 km ice stream/ice shelf (at coarse resolution) in a
39        rectangular embayment
40      - halfpipe_streamice is forward-only for now, will have TAF test soon
41      - for questions, email dgoldber@mit.edu
42    o pkg/thsice:
43      - fix filling of snow-precip diagnostic (SIsnwPrc) (left from the removing
44        of snowPrc from common bloc, on May 2nd, thsice_step_fwd.F revision 1.40);
45      - remove diagnostics 'SI_FrcFx' ( now identical to 'SI_Fract' with new
46         call sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect );
47      - allow precip from pkg/cheapaml to make snow over seaice.
48    o pkg/cfc:
49      - move in separated header file (CFC_ATMOS.h) time-serie arrays of Atmos CFC
50      - remove atmos CFC 2-D arrays from common bloc (now local variables)
51      - change some hard-coded constant to run time parameter for reading and
52        and interpolating atmospheric CFC ; keep same default as previously.
53      - more flexible reading of Atmos CFC (number of records no longer hard-coded)
54      - put arguments in standard order: myTime, myIter, myThid
55      - use standard S/R GET_PERIODIC_INTERVAL for time interpolation of
56        atmospheric CFC ; fix for the case myIter < PTRACERS_iter0.
57      - fix calculation of surf tendencys for partial-cell and/or Non-Lin Free-Surf
58      - new routine to print summary of CFC params and check for consistency.
59    o pkg/seaice: add uice/vice to the parameter list of s/r seaice_advdiff,
60      similar to thsice_advdiff.
61      Note that for the B-grid case the routine parameters uc/vc are overwritten.
62    o pkg/cfc:
63      - change time interpolation for atmospheric CFC-11 (now same as for CFC-12);
64        update output (CFC-11) of experiment cfc_example and tutorial_cfc_offline.
65      - fix interpolation of atmphspheric CFC between Sorthern and Northern
66        hemisphere value.
67    o pkg/seaice:
68      - allow to use seaice dynamics without pkg/exf (e.g., using pkg/cheapaml)
69    o pkg/seaice: add Adams-Bashforth2 time discretization for ice dynamics;
70                  so far only for JFNK-solver, turn on with SEAICEuseAB2 = .TRUE.
71      - requires an additional time level that is stored in the pickup
72      - you can start with AB2 from a pickup without this time level with
73        pickupStrictlyMatch = .false.
74    
75    checkpoint64h (2013/05/26)
76    o pkg/cheapaml:
77      - replace one ()**.5 with SQRT + use temp var "cdu = tau/Du" (coare3_flux);
78        affect machine truncation (but exp cheapAML_box still pass with 13 digits).
79      - consistent treatment of uWind,vWind location: assume everywhere in
80        pkg/cheapaml that they are on C-grid (@ uVel,vVel location)
81        (Note: was already the case for Tair,Qair advection);
82        add option (INCONSISTENT_WIND_LOCATION) to recover old results.
83      - compute diabatic forcing only in the interior (excluding overlap regions)
84      - fill in array "Qsw" (for short-wave heating);
85      - add diagnostic for precip ; fill-in diagnostics for cheapAML state vars
86        before any update (consistent with MITgcm state var diagnostics);
87      - cheapaml_fields_load.F & cheapaml_init_varia.F : only fill outer edges if
88        non periodic ; + adjusted for uWind,vWind (C-grid).
89    o pkg/seaice:
90      - remove dependence of pkg/seaice versus pkg/exf (file: pkg/pkg_depend) and
91        add explicitly pkg/exf in experiments that currently use pkg/seaice.
92      - allows to compile pkg/seaice without pkg/exf.
93    o tools/OAD_support:
94      - use a local copy (ourRWCPinBd) to ensure index ourRWCP stays within bounds
95        of array "ourStepOf" in function rvNextAction (revolve.F90).
96    o pkg/aim_compon_interf renamed to pkg/atm_compon_interf
97      - change pkg name (to be used with other atmospheric physics pkg)
98        but by-pass CVS when making the new pkg so that we keep the CVS history.
99    o pkg/offline:
100      - call OFFLINE_FIELDS_LOAD from pkg/offline/offline_init_varia.F
101        (previously called from pkg/dic_surfforcing_init.F)
102    o model/src:
103      - re-order sequence of calls within packages_init_variables.F, using
104        standard order, except for:
105         DIAGNOSTICS_INIT_VARIA and OFFLINE_INIT_VARIA (called @ the top),
106         CTRL_MAP_INI and OBCS_INIT_VARIABLES (called @ the bottom)
107    o new pkg: atm_phys
108      - add entry point and source code (previously in contrib
109          verification_other/atm_gray/code_gray/) for new pkg "atm_phys"
110        (atmospheric physics pkg from P. O'Gorman and T. Schneider, JCl, 2008).
111      - re-order sequence of calls within packages_readparms.F,
112         packages_init_fixed.F and packages_write_pickup.F
113        (but skip packages_init_variables.F because of TAF issues).
114      - update contrib/*/atm_gray/ experiment.
115    o pkg/seaice (ITD code):
116      - simplify and fix the writing of pickup-files for ITD case
117    o pkg/seaice (ITD code):
118      - introduce floe size dependent lateral melt for ITD case;
119      - cleaning (avoid division by zero, change to f77 syntax, remove tabs)
120      - update seaice_itd experiment main output.
121    o pkg/thsice:
122      - remove snowPrc from common block THSICE_FLUX, in THSICE_VARS.h and
123        declared it locally (without bi,bj) in thsice_main.F & aim_do_physics.F;
124        changed accordingly pkg/atm2d.
125    
126    checkpoint64g (2013/05/01)
127    o pkg/exf ALLOW_RUNOFTEMP
128      - if defined,  river and glacier runoff temperature can be read-in from
129        runoftempfile; runoftempfile needs to have same format as runofffile
130    o pkg/thsice (& pkg/bulk_force):
131      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
132        for energy content of Precip + RunOff & Evap (like with pkg/exf).
133      - change computation domain to always be the interior (without overlap).
134      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
135    o verification/tutorial_global_oce_biogeo:
136      - add preliminary OpenAD setup (still has problems)
137    o pkg/seaice:
138      - turn some parameters for choosing the convergence criterion of
139        the inexact Newton method (JFNK) into runtime parameters for convenience
140      - clean up seaice_calc_viscosities.F: remove/retire two options for
141        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
142        the results of lab_sea/input because a division has been replaced by
143        a multiplication with the reciprocal (sumNorm)
144      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
145        convergence of solver (changes results, of course), and to test some
146        new features
147    o model/src:
148      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
149      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
150      - move forcing adjustment (balancing surface forcing) in specific S/R
151        where might also be applied exchanges (if needed) to forcing arrays.
152    o pkg/shelfice:
153      - allow to specify the Ice-Shelf mass per unit area (instead of
154        shelficeLoadAnomaly) and do the conversion from one to the other
155      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
156        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
157        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
158        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
159      - update isomip experiment forward output (get machine truncation error
160        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
161    o verification/offline_exf_seaice:
162      revise data.seaice in input.thermo and input_ad and update results accordingly
163        HO = 0.2, SEAICE_areaLossFormula = 2,
164        SEAICE_growMeltByConv = .TRUE.,
165        SEAICE_doOpenWaterMelt = .TRUE.,
166      Improve consistency with input.thsice and fix the spurious 500m ice corners
167    o verification/global_ocean.cs32x15:
168      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
169        in icedyn (thsice+seaice-dyn) test and update output.
170    o verification/offline_exf_seaice:
171      - adjust list of tested variables (with testreport) and update
172        standard test output with better slection of monitored fields.
173    o pkg/cd_code:
174      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
175        experiment lab_sea.hb87
176    o tools/genmake2:
177      - change default makedepend from the system default to tools/xmakedepend:
178        When no makedepend is specified, select tools/xmakedepend it the test pass,
179        otherwise select the system default (if exist and pass the test) or
180        try to build cyrus-makedepend ; stop if none of the 3 works.
181    o pkg/exf & pkg/thsice:
182      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
183        for energy content of Precip + RunOff & Evap. Assumes:
184       1) Rain has same temp as Air.
185       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
186       3) Run-Off comes at the temp of surface water (with same Cp)
187       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
188        put directly into Latent Heat flux & should use water-vapor heat capacity.
189       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
190        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
191    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
192        (compile when SEAICE_ALLOW_JFNK is defined)
193    o pkg/thsice:
194      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
195        implementation): move THSICE_AVE call after the advection (called directly
196        from thsice_do_advect.F).
197    o verification/global_ocean.90x40x15 and OpenAD:
198      New experiment for OpenAD is identical to the one in input_ad except that
199        multiDimAdvection=.FALSE.,
200      There is still an issue with this.
201    o pkg/thsice:
202      - account for ice velocity (ocean relative velocity) in turbulent heat flux
203        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
204        and offline_exf_seaice (main test).
205    
206    checkpoint64f (2013/03/31)
207    o verification/OpenAD:
208      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
209    o verification/isomip, pkg/shelfice and OpenAD:
210      - add OpenAD setup to this exp and make shelfice package work with OpenAD
211    o verification/tutorial_global_oce_biogeo:
212      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
213    o verification/offline_exf_seaice:
214      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
215    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
216      - add OpenAD setup to this exp and make ptracers package work with OpenAD
217    o pkg/seaice/seaice_evp.F:
218       mask the asymmetric contribution of the ice-ocean stress (when
219       the turningAngle is non-zero) over open water to avoid stripes
220       in the EVP-solutions after many EVP-substeps. This does not change
221       the verification experiment (because turningAngle=0 in that experiment),
222       but will affect other EVP solutions with turningAngle.ne.0
223    o verification, AD & TLM output:
224      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
225        additions and multiplications which affect results at machine truncation
226        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
227        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
228        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
229        digits of matching.
230    o pkg/seaice:
231       modify lsr-algorithm so that it vectorizes AND converges by using a
232       "zebra" method: split vector loop into two with step size 2; this
233       solves a general convergence problem for the JFNK solver on a vector
234       computer. It has the potential to even improve convergence for
235       non-vector machines, but it does change the results so it is turned
236       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
237       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
238    
239    checkpoint64e (2013/03/05)
240    o pkg/ecco and several verification experiments:
241       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
242       from ecco package, and revert to unified routine in model/src/
243       Adjust verification experiments accordingly, especially gloal_oce_llc90
244       Should conclude long-standing work by Gael to reconsile the_main_loop with
245       ECCO and will enable OpenAD's revolve loop in ECCO setup.
246    o pkg/generic_advdiff:
247      - implement compressible flow method for multi-dim advection (similar to
248        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
249        TAF generates many recomputations) to use it; no yet coded with implicit
250        vertical advection.
251      - change experiment advect_cs (new output) and advect_xy (same output)
252        to test compressible flow multi-dim advection.
253    o pkg/generic_advdiff:
254      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
255        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
256    o pkg/seaice:
257      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
258        bug affects two verification experiments (lab_sea and lab_sea.hb87),
259        recover old (wrong) results by setting noSlipFac = 2. in
260        seaice_calc_strainrates.F;
261      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
262      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
263        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
264      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
265    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
266      - new subroutines seaice_lsr_tridiagu/v
267      - introduce loop bounds i/jmin/max to be able to use a restricted
268        additive Schwarz method, but not used for now.
269      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
270      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
271    o OpenAD support
272       Reorganize S/R call for overall time-stepping loop to facilitate
273       OpenAD revolve loop replacement
274       (new S/R main_do_loop.F)
275    o model/src:
276      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
277      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
278        ADAMS_BASHFORTH2.
279    o pkg/cheapaml:
280      - add new parameter (default=F, same as before) to disable full domain
281        (including land) periodicity in X & Y dir.
282      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
283        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
284        into single S/R CHEAPAML_TIMESTEP.
285    
286    checkpoint64d (2013/02/17)
287    o pkg/monitor (angular momentum):
288      - do not add Eta contribution to the total AM if using rigid-lid;
289      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
290      - horizontal discretisation: compute Zonal wind contribution separately for
291        each component (instead of from cell centered averaged) and use the 4
292        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
293      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
294        FreeSurf) if using vectorInvariant momentum.
295    o model/src (horizontal grid):
296      - move initialisation of all horizontal grid arrays to null value
297        from specific horizontal grid S/R to main S/R INI_GRID;
298      - add 2 new arrays to project model C-grid velocity on to zonal direction
299        (similar to AngleCosC & -AngleSinC but at U and V point location) and
300        compute them in S/R CALC_GRID_ANGLES.
301    o pkg/seaice: replace a hard coded parameter by a runtime parameter
302        SEAICE_JFNK_tolIter
303    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
304        preconditioner for JFNK (run LSR into the overlaps as far as possible,
305        i.e OLx/y-2, but overwrite the solution in the overlaps)
306      - extend loop range in seaice_calc_viscosity
307      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
308      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
309      - slightly modify loops in tridiagonal solver lsr-preconditioner
310      - by default remove the extra exchange in seaice_preconditioner with a
311        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
312      - modify offline_exf_seaice so that old results without RAS are reproduced
313        for output.dyn_jfnk.txt
314      in seaice_fgmres.F (unrelated to RAS)
315      - add a cpp-flag option for a re-ordered mapping (potentially more
316        efficient), but because this changes the results, turn it off by
317        default
318      - replace the save statement by local common blocks
319    o utils/matlab:
320      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
321      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
322        instead of local script "load_cs.m".
323    o pkg/seaice:
324      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
325        to the scalarProductMetric and the unrolling. By chance this does not
326        change the verification experiment, because of the particular domain
327        decomposition
328    o pkg/diagnostics:
329      - change default missing_value from UNSET_RL to -999.
330    o pkg/layers: improve vectorization of layers_fluxcalc.F
331      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
332        time spent in this routine by more than a factor of 3 on an NEC-SX8
333      - step 2: replace search algorithm by a bisection algorithm found in
334        Press et al. Numerical Recipes in Fortran. This algorithm can be
335        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
336        For now, use this algorithm only for TARGET_NEC_SX defined.
337      - moved the search algorithm into a separate subroutine, that is kept
338        within the same file for automatic inlining.
339      - modified catching potential errors
340    o pkg/ecco:
341      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
342    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
343      - modifications for ALLOW_GENTIM2D_CONTROL
344      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
345      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
346      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
347      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
348    o model/src:
349      - account for moist thermodynamics in (dry) potential temperature equation;
350        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
351        and cpl_aim+ocn.
352      - also switch to standard compiler (gfortran, was using ifort previously)
353        for fizhi-cs experiments reference output.
354    o pkg/ctrl:
355      - 1st step toward generic time-varying control variable (2D) via CPP option
356        ALLOW_GENTIM2D_CONTROL
357      - note new namelist ctrl_nml_genarr in data.ctrl
358    o verification/global_ocean.cs32x15:
359      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
360        thsice calling sequence and update "output.icedyn.txt" output file.
361    o pkg/ptracers:
362      - from Ryan A.: code to allow to restart a tracer at regular time interval
363        specifying a reset frequency and a reset-phase (for each tracers).
364    o pkg/thsice:
365      - implement new sequence of calls for thsice+seaice:
366          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
367          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
368      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
369        in CPP_OPTIONS.h) to recover old sequence;
370      - update diagnostics for Intermediate State thsice diagnostics: now filled
371        just before advection (instead of just after advection in old sequence);
372      - update output of experiment offline_exf_seaice (standard test);
373      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
374        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
375    o pkg/aim_v23:
376      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
377      - use standard pkg/mdsio routines to read & write CO2 pickup file;
378      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
379      - Implement new sequence of calls for seaice advection (with thsice and
380        seaice diffusion): do ice advection after ice-Thermodynamic (previously
381        was done before); change aim_do_physics.F (split the bi,bj loops block);
382      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
383    o pkg/thsice:
384      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
385        where just seaice diffusion is used without seaice-dynamics.
386    
387    checkpoint64c (2013/01/18)
388    o pkg/seaice:
389      - add a parameter JFNKres_tFac that can replace JFNKres_t
390        (= JFNKres_tFac*JFNKresidual before JFNK solver)
391      - add a line search option to the JFNK solver
392      - move update of u/vIce and computation of initial residual into a separate
393        routine (same file); makes the code a little easier to read (?)
394      - the line search requires computation of the residual and for some reason
395        I cannot do the update of u/vIce at the beginning of the Newton loop
396        without changing the results, so we move computation of the new residual
397        also to the end of the Newton loop, even without the line search
398    o pkg/mdsio:
399      - write missing value (corresponding to undefined array value) to meta files;
400        skip this if missing value is one (UNSET_RL would be a better value for the
401        case of undefined missing value but it's current the default missing-value);
402        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
403    o pkg/exf & thsice:
404      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
405        diagnostics) even when SHORTWAVE_HEATING is #undef;
406    o verification/cfc_example:
407      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
408        illustrate how to use it).
409    o verification/offline_exf_seaice:
410      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
411        files to only one time-record.
412      in input.thermo: narrow the 2 bands of low initial ice-concentration near
413        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
414        snapshot output; same mcPheePiston value as in thsice with
415        surf-current=0.2m/s.
416      in input.thsice: similar set-up as in input.thermo (channel with same seaice
417        initial conditions).
418    o verification/cfc_example:
419      - update file "data" with more standard choice (default rotationPeriod,
420        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
421        set deltaTFreeSurf to deltaTtracer) and update the output.
422    o pkg/layers:
423      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
424      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
425    o verification/offline_exf_seaice:
426      - set all {field}period to zero for constant-in-time forcing (not tested
427        anywhere else).
428    o verification/offline_exf_seaice:
429      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
430      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
431    o model/src:
432      - implement Finite-Volume method for (hydrostatic) presure gradient
433        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
434    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
435      - In order to be compatible with the default EVP code, this requires changing
436        the EVP code around a little; and because any small change immediately
437        breaks the lab_sea.hb87 verification experiment, the reference output is
438        updated two times (each time the remaining aggrement was only 2 digits):
439        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
440        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
441        The adjoint test lab_sea.evp also needed to be updated.
442      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
443        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
444        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
445        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
446        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
447        kept obscure, because I need to test it a little more.
448    o pkg/cheapaml:
449      - fix few incorrect type (_RL/_RS) in subroutine calls.
450    o pkg/seaice:
451      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
452        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
453    o model/src:
454      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
455        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
456        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
457    o pkg/cheapaml:
458      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
459        update output of experiment cheapAML_box.
460      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
461        and set them only in one place (cheapaml_readparms.F).
462      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
463      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
464        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
465    o model/src/the_main_loop.F:
466      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
467    o pkg/seaice:
468      - remove legacy branch code.
469      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
470    o verification/*/code*/SEAICE_OPTIONS.h:
471      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
472        SEAICE_CAP_HEFF).
473    o pkg/cheapaml:
474      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
475        to load new forcing fields.
476      - add missing "_d 0" where it's needed; + some editing (improve indentation).
477      - remove switch to "-r8" compiler option (no longer needed) in verification
478        cheapAML_box, keep same output (small trucation error differences).
479    o verification/offline_exf_seaice:
480      - add thermodynamics only test.
481    o verification/cheapAML_box:
482      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
483        keep same output (same 14 digits for cg2d).
484      - switch on "-r8" compiler option (some numerical values are missing
485        the "_d 0") and update output (only 6 digits for cg2d were preserved).
486    
487    checkpoint64b (2012/12/24)
488    o pkg/cheapaml:
489      - remove un-used variables (Qnet,EmPmR) from pickup files.
490      - store tendency of advected variables into cheapaml pickup file
491        and fix the AB-2 restart.
492    o verification/offline_exf_seaice and lab_sea adjoint:
493      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
494      - switch to 4 time steps in offline, consistent with lab_sea.
495      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
496      - update results after change of experiment seaice.
497    o pkg/seaice:
498      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
499        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
500        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
501        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
502    o model/src:
503      - add run-time parameter to select CG2D solver minimum-residual solution
504        (in case of a poor convergence).
505    o pkg/seaice/seaice_lsr.F
506      - move calculation of matrix coefficients into new
507        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
508        file; the main purpose of this change is to be able to reuse the code
509        in S/R SEAICE_PRECONDITIONER
510      - modify the computation of the residual so that the mass of sea-ice
511        is not used twice; this simplifies the calculations, but since
512        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
513        not tested in testreport---this does not affect the testreport results.
514    o verification/seaice_obcs:
515      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
516        verification/lab_sea/input.salt_plume; changes results/output.txt*
517    o model/src:
518      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
519    o pkg/seaice:
520      - improve description of parameters in seaice_fgmres.F and start
521        cleaning up the code
522      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
523        second argument
524      - add a metric based on grid cell area to SEAICE_SCALPROD; update
525        results of offline_exf_seaice.dyn_jfnk
526      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
527    o pkg/aim_v23:
528      - fix an other bug in dissipation heating (grid-cell area was missing).
529    o model/src + pkg/seaice:
530      - add global (multi-tile) linear solver for pair of tri-diagonal system
531        along X and Y lines, respectively for U and V component.
532        Note: 1) MPI and cube-exchange not yet coded.
533            2) probably not accurate for poorly conditioned / large size problem.
534      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
535        default: not compiled and not used.
536    o pkg/seaice:
537      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
538        introduce bi/bj loops and use global_sum_tile_rl instead of
539        mpi_allreduce in seaice_fgmres.F
540      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
541      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
542      - add a verification experiment for JFNK in offline_exf_seaice
543    o verification:
544      - change (for now, only fwd test) offline_exf_seaice experiment:
545        use a re-entrant channel with idealized coastline (trapezoidal shape)
546        at southern boundary to explore seaice dynamics and thermodynamics
547        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
548        secondary test (input.thsice) use thermodynamics only with SST relaxation.
549      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
550    o pkg/exf:
551      - disable "sstExtrapol" when Nr=1
552    o verification:
553      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
554        to test pkg/cheapaml.
555    o pkg/aim_v23 & pkg/shap_filt:
556      - fix dissipation heating (erroneous gravity multiplication factor).
557    o pkg/seaice:
558      - remove unused field pressPre from jfnk solver
559      - rename two subroutines in seaice_preconditioner.F
560    o eesupp/src:
561       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
562    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
563       - remove wrong parts of the rhs and the lhs (were in there
564         because I did not understand the concept of this preconditioner)
565       - add an exchange between u- and v-sweep. This increases communication
566         by a factor of two but improves the convergence of jfnk. Ideally,
567         one would like the u- and v-sweep to be independent. So far within
568         undocumented ifdefs
569       - reorganize the extra computations for printing the residuals
570    o tools/genmake2:
571      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
572        since it's not necessary (and was preventing to use MNC in some cases).
573    
574    checkpoint64a (2012/11/16)
575    o pkg/autodiff:
576      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
577        autodiff_readparms.F no longer depends on calling order (within
578        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
579        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
580        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
581    o pkg/obcs:
582      - adding tidal velocity forcing capability to obcs
583        for usage example, see verification/seaice_obcs/input.tides
584    o pkg/seaice:
585      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
586        SEAICE_LSRrelaxU/V
587      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
588    o pkg/aim_v23:
589      - implement heating from friction (bottom friction and stratospheric drag).
590    o pkg/shap_filt:
591      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
592        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
593    o model/src:
594      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
595        time-constant addMass field from file (addMassFile);
596      - support for heating due to friction (and Kinetic Energy dissipation):
597        add option, run-time switch and 3-D field array + support code ; each pkg
598        or S/R can add heating contribution (if there is a sink of KE); the sum is
599        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
600    o pkg/seaice:
601      - complete merge of ITD code into seaice_growth.F
602        from MITgcm_contrib/torge/itd/code/
603        no verification so far, but Torge Martin tested
604        "1-D test case and Beaufort set up;
605        deliver okay results after 1 model year."
606      - complete merge of SEAICE_SIZE.h into all relevant routines
607      - move computation of eta at Z-points into calc_viscosities
608        + introduce global field etaZ
609        + add different methods for computing etaZ, for now the old
610          method (simple averages of eta to Z-points) is hardwired
611        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
612          seaice_preconditioner
613      - simplify computations for SEAICE_ZETA_SMOOTHREG
614      - seaice_preconditioner:
615        + replace one remaining press by pressLoc (mistake)
616        + adjust printing of residuals
617      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
618        + add (SEAICE.h) and rename some counters (initiliased in
619          seaice_init_fixed.F)
620        + add _BEGIN/END_MASTER (myThid)  around print statements
621        + print total number of iterations and failures over SEAICE_monFreq
622          interval to STDOUT
623      - move control over output-messages by fgmres to seaice_jfnk to save
624        some operations
625      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
626        in order to make restarts with sol .ne. zero (fgmres with restarts)
627        (seaice_jfnk.F, seaice_fgmres.F)
628      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
629        a serious convergence problem when open boundaries are involved
630    o pkg/ggl90: fix computation of control volumes for the case of
631    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
632    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)
633  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
634  o pkg/autodiff  o pkg/autodiff
635    - Add inAdMode switch for SEAICEuseDYNAMICS:    - Add inAdMode switch for SEAICEuseDYNAMICS:
636      SEAICEuseDYNAMICSinAdMode      SEAICEuseDYNAMICSinAdMode
637      (extend logic in ADAUTODIFF_INADMODE_SET)      (extend logic in ADAUTODIFF_INADMODE_SET)
638  o pkg/seaice  o pkg/seaice
639    - Step 1 of merging ice-thickness distribution (ITD) code from    - Step 1 of merging ice-thickness distribution (ITD) code from

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