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revision 1.1743 by mlosch, Mon Sep 24 15:07:38 2012 UTC revision 1.1902 by jmc, Fri Jul 26 14:25:21 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 model/src:
8      - extend length of drC & recip_drC from Nr to Nr+1.
9    o Divided Adjoint (DIVA) with MPI:
10      - genmake2: do not create local ./mpi_headers dir when no file to copy into.
11      - remove option ALLOW_DIVIDED_ADJOINT_MPI (replaced by ALLOW_DIVIDED_ADJOINT
12        and ALLOW_USE_MPI) from model/src code and from ECCO_CPPOPTIONS.h.
13    
14    checkpoint64k (2013/07/23)
15    o tools/OAD_support:
16      - avoid the need for file "oadtempflile" in insertTemplateDir.bash
17        and remove it from genmake2.
18    o tools/build_options:
19      - remove MPI_HEADER_FILES_INC setting (no longer used) and comment out
20        MPI_HEADER_FILES list (let genmake2 find the missing headers)
21    o verification/halfpipe_streamice:
22      - change to driving stress formulation; update both Fwd & AD output.
23    o tools/genmake2 and Divided Adjoint with MPI:
24      - remove default setting of MPIINCLUDEDIR from $MPIHOME (always been broken);
25      - only create local ./mpi_headers dir if using MPI and MPIINCLUDEDIR is set;
26      - add new variable (LOCAL_MPI_HEADERS, replace MPI_HEADER_FILES_INC) in
27        Makefile, which is set by genmake2, and check which mpi-headers are needed.
28        Note: need to update adjoint_options/adjoint_diva_mpi accordingly.
29      - update target "CLEAN" (to also remove ./mpi_headers/ dir).
30    o testreport:
31      - changes for Divided Adjoint Run: when file "run_ADM_DIVA" is present,
32        perform additional runs (number of additional runs is "add_DIVA_runs" taken
33        from file run_ADM_DIVA ; should match "nchklev_3" in file "code_ad/tamc.h").
34    o verification/lab_sea (AD test):
35      - change to test Divided Adjoint Run in this set-up (both standard AD test
36        and 2 secondary AD test: noseaice + noseaicedyn); drop the evp AD test.
37    o pkg atm_ & ocn_compon_interf:
38      - remove cpl_earlyExpImpCall=F option (was mainly a hack added for the old
39        staggerTimeStep implementation) and disable (retired) corresponding
40        parameter.
41    o pkg/offline:
42      - comment out unused field-array: ICEM, ConvectCount, hflx[01], icem[01];
43      - add S/R OFFLINE_CHECK to print offline parameter summary
44        and stop if loading a file that is not used;
45      - enable to calculate GMRedi tensor, KPP mixing and convective index
46        when the corresponding file(s) is/are not specified (but pkg is used).
47      - comment out resetting of monitorFreq (to endTime) since it still useful
48        for monitoring CFL numbers and checking offline fields.
49    o OpenAD:
50      - do not define OAD_DEBUG (in tools/adjoint_options/adjoint_oad) to get
51        smaller standard output) and generate new (smaller) output (on baudelaire
52        using gfortran with -ieee) for exp. tutorial_tracer_adjsens
53    o model/src:
54      - call EXTERNAL_FORCING_SURF outside bi,bj loops (in do_oceanic_phys.F),
55        (where external_forcing_adjust was called) and change list of arguments;
56      - merge external_forcing_adjust.F into external_forcing_surf.F
57      - put surface relaxation of SST & SSS in new S/R (forcing_surf_relax.F)
58        which also contains balancing surface relaxation (ALLOW_BALANCE_RELAX,
59        previously in file "balance_relax.F", now removed); remove corresponding
60        arrays in FFIELDS.h.
61      - EXTERNAL_FORCING_SURF is now called when using pkg/offline; implement
62        a hack for getting back surfaceForcingS (loaded from file) when using
63        ALLOW_OLD_VIRTUALFLUX (pkg/dic, in DIC_OPTIONS.h) in offline set-up.
64      - update output of AD test experiment global_ocean.cs32x15.seaice_dynmix
65        (was getting only 11 digits for AD-grad, due to different truncation
66         error in AD code).
67    
68    checkpoint64j (2013/07/04)
69    o pkg/offline:
70      - to enable the use of other features with pkg offline (e.g., obcs),
71        also call S/R DO_OCEANIC_PHYS in offline run - more modifs to come.
72      - comment out "allowFreezing" (now active) in 2 offline testing exp.
73    o pkg/exf ALLOW_RUNOFTEMP
74      - fix sign and make compatible with temp_EvPrRn .NE. UNSET_RL
75      - ahdded RUNOFTEMP test to verification/global_ocean.cs32x15/input.seaice
76      - changes verification/global_ocean.cs32x15/results/output.seaice.txt
77    o pkg/atm_phys:
78      - allows to add some damping on uVel,vVel (strength only function of k).
79    o verification, ad-tests:
80      - reduce length of the simulation for AD test: global_ocean.cs32x15.seaice,
81        global_ocean_ebm and offline_exf_seaice.thsice.
82    o verification/halfpipe_streamice:
83      - found a bug in s/r pkg/streamice/streamice_advect_thickness which caused
84        flux input boundary conditions to be ignored; a fix for this bug changed
85        verification results for forward test.
86      - add adjoint test.
87    o pkg/ptracers:
88      - allow to restart without SOM pickup (resetting SOM to zero).
89    o pkg/gmredi:
90      - New parameterisation for the calculation of K and (GM_PsiX,GM_PsiY) added.
91      - It uses mixing length theory and suppression by steering level effects to
92        calculate a diffusivity used in the Redi tensor (see Bates et al., submitted
93        to JPO, for more details).
94      - It also uses the diffusivity to calculate an eddy induced streamfunction
95        based on a PV closure (rather than a buoyancy closure as in GM).
96      - New files added to pkg/gmredi:
97        gmredi_k3d.F calculates the diffusivity for the Redi tensor and the eddy
98          induced overturning streamfunction (called from gmredi_calc_tensor)
99        gmredi_calc_eigs.F calculates the eigenvalues and eigenvectors required
100          for use in gmredi_k3d
101        gmredi_calc_urms.F calculates the the rms eddy velocity used to calculate
102          the eddy diffusivity
103    
104    checkpoint64i (2013/06/18)
105    o pkg/cheapaml:
106      - take src files from MITgcm_contrib/verification_other/offline_cheapaml/code
107        that enable the use of seaice (pkg/thsice thermo & pkg/seaice dynamics)
108        with pkg/cheapaml.
109    o utils/python: add subpackage for cubed sphere function, first example is
110        simple cs.pcol to plot 2D fields on a map
111    o pkg/streamice:
112      - This is a new package in MITgcm, which solves dynamic equations for ice
113         sheets and ice streams
114      - At the moment it is independent of atmosphere/ocean dynamics, or any
115        other physical packages in MITgcm, even ShelfIce (although it is anticipat-
116        ed that this will change)
117      - There is a new verification exercise that tests it, halfpipe_streamice,
118        evolves a 40x80 km ice stream/ice shelf (at coarse resolution) in a
119        rectangular embayment
120      - halfpipe_streamice is forward-only for now, will have TAF test soon
121      - for questions, email dgoldber@mit.edu
122    o pkg/thsice:
123      - fix filling of snow-precip diagnostic (SIsnwPrc) (left from the removing
124        of snowPrc from common bloc, on May 2nd, thsice_step_fwd.F revision 1.40);
125      - remove diagnostics 'SI_FrcFx' ( now identical to 'SI_Fract' with new
126         call sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect );
127      - allow precip from pkg/cheapaml to make snow over seaice.
128    o pkg/cfc:
129      - move in separated header file (CFC_ATMOS.h) time-serie arrays of Atmos CFC
130      - remove atmos CFC 2-D arrays from common bloc (now local variables)
131      - change some hard-coded constant to run time parameter for reading and
132        and interpolating atmospheric CFC ; keep same default as previously.
133      - more flexible reading of Atmos CFC (number of records no longer hard-coded)
134      - put arguments in standard order: myTime, myIter, myThid
135      - use standard S/R GET_PERIODIC_INTERVAL for time interpolation of
136        atmospheric CFC ; fix for the case myIter < PTRACERS_iter0.
137      - fix calculation of surf tendencys for partial-cell and/or Non-Lin Free-Surf
138      - new routine to print summary of CFC params and check for consistency.
139    o pkg/seaice: add uice/vice to the parameter list of s/r seaice_advdiff,
140      similar to thsice_advdiff.
141      Note that for the B-grid case the routine parameters uc/vc are overwritten.
142    o pkg/cfc:
143      - change time interpolation for atmospheric CFC-11 (now same as for CFC-12);
144        update output (CFC-11) of experiment cfc_example and tutorial_cfc_offline.
145      - fix interpolation of atmphspheric CFC between Sorthern and Northern
146        hemisphere value.
147    o pkg/seaice:
148      - allow to use seaice dynamics without pkg/exf (e.g., using pkg/cheapaml)
149    o pkg/seaice: add Adams-Bashforth2 time discretization for ice dynamics;
150                  so far only for JFNK-solver, turn on with SEAICEuseAB2 = .TRUE.
151      - requires an additional time level that is stored in the pickup
152      - you can start with AB2 from a pickup without this time level with
153        pickupStrictlyMatch = .false.
154    
155    checkpoint64h (2013/05/26)
156    o pkg/cheapaml:
157      - replace one ()**.5 with SQRT + use temp var "cdu = tau/Du" (coare3_flux);
158        affect machine truncation (but exp cheapAML_box still pass with 13 digits).
159      - consistent treatment of uWind,vWind location: assume everywhere in
160        pkg/cheapaml that they are on C-grid (@ uVel,vVel location)
161        (Note: was already the case for Tair,Qair advection);
162        add option (INCONSISTENT_WIND_LOCATION) to recover old results.
163      - compute diabatic forcing only in the interior (excluding overlap regions)
164      - fill in array "Qsw" (for short-wave heating);
165      - add diagnostic for precip ; fill-in diagnostics for cheapAML state vars
166        before any update (consistent with MITgcm state var diagnostics);
167      - cheapaml_fields_load.F & cheapaml_init_varia.F : only fill outer edges if
168        non periodic ; + adjusted for uWind,vWind (C-grid).
169    o pkg/seaice:
170      - remove dependence of pkg/seaice versus pkg/exf (file: pkg/pkg_depend) and
171        add explicitly pkg/exf in experiments that currently use pkg/seaice.
172      - allows to compile pkg/seaice without pkg/exf.
173    o tools/OAD_support:
174      - use a local copy (ourRWCPinBd) to ensure index ourRWCP stays within bounds
175        of array "ourStepOf" in function rvNextAction (revolve.F90).
176    o pkg/aim_compon_interf renamed to pkg/atm_compon_interf
177      - change pkg name (to be used with other atmospheric physics pkg)
178        but by-pass CVS when making the new pkg so that we keep the CVS history.
179    o pkg/offline:
180      - call OFFLINE_FIELDS_LOAD from pkg/offline/offline_init_varia.F
181        (previously called from pkg/dic_surfforcing_init.F)
182    o model/src:
183      - re-order sequence of calls within packages_init_variables.F, using
184        standard order, except for:
185         DIAGNOSTICS_INIT_VARIA and OFFLINE_INIT_VARIA (called @ the top),
186         CTRL_MAP_INI and OBCS_INIT_VARIABLES (called @ the bottom)
187    o new pkg: atm_phys
188      - add entry point and source code (previously in contrib
189          verification_other/atm_gray/code_gray/) for new pkg "atm_phys"
190        (atmospheric physics pkg from P. O'Gorman and T. Schneider, JCl, 2008).
191      - re-order sequence of calls within packages_readparms.F,
192         packages_init_fixed.F and packages_write_pickup.F
193        (but skip packages_init_variables.F because of TAF issues).
194      - update contrib/*/atm_gray/ experiment.
195    o pkg/seaice (ITD code):
196      - simplify and fix the writing of pickup-files for ITD case
197    o pkg/seaice (ITD code):
198      - introduce floe size dependent lateral melt for ITD case;
199      - cleaning (avoid division by zero, change to f77 syntax, remove tabs)
200      - update seaice_itd experiment main output.
201    o pkg/thsice:
202      - remove snowPrc from common block THSICE_FLUX, in THSICE_VARS.h and
203        declared it locally (without bi,bj) in thsice_main.F & aim_do_physics.F;
204        changed accordingly pkg/atm2d.
205    
206    checkpoint64g (2013/05/01)
207    o pkg/exf ALLOW_RUNOFTEMP
208      - if defined,  river and glacier runoff temperature can be read-in from
209        runoftempfile; runoftempfile needs to have same format as runofffile
210    o pkg/thsice (& pkg/bulk_force):
211      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
212        for energy content of Precip + RunOff & Evap (like with pkg/exf).
213      - change computation domain to always be the interior (without overlap).
214      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
215    o verification/tutorial_global_oce_biogeo:
216      - add preliminary OpenAD setup (still has problems)
217    o pkg/seaice:
218      - turn some parameters for choosing the convergence criterion of
219        the inexact Newton method (JFNK) into runtime parameters for convenience
220      - clean up seaice_calc_viscosities.F: remove/retire two options for
221        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
222        the results of lab_sea/input because a division has been replaced by
223        a multiplication with the reciprocal (sumNorm)
224      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
225        convergence of solver (changes results, of course), and to test some
226        new features
227    o model/src:
228      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
229      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
230      - move forcing adjustment (balancing surface forcing) in specific S/R
231        where might also be applied exchanges (if needed) to forcing arrays.
232    o pkg/shelfice:
233      - allow to specify the Ice-Shelf mass per unit area (instead of
234        shelficeLoadAnomaly) and do the conversion from one to the other
235      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
236        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
237        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
238        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
239      - update isomip experiment forward output (get machine truncation error
240        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
241    o verification/offline_exf_seaice:
242      revise data.seaice in input.thermo and input_ad and update results accordingly
243        HO = 0.2, SEAICE_areaLossFormula = 2,
244        SEAICE_growMeltByConv = .TRUE.,
245        SEAICE_doOpenWaterMelt = .TRUE.,
246      Improve consistency with input.thsice and fix the spurious 500m ice corners
247    o verification/global_ocean.cs32x15:
248      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
249        in icedyn (thsice+seaice-dyn) test and update output.
250    o verification/offline_exf_seaice:
251      - adjust list of tested variables (with testreport) and update
252        standard test output with better slection of monitored fields.
253    o pkg/cd_code:
254      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
255        experiment lab_sea.hb87
256    o tools/genmake2:
257      - change default makedepend from the system default to tools/xmakedepend:
258        When no makedepend is specified, select tools/xmakedepend it the test pass,
259        otherwise select the system default (if exist and pass the test) or
260        try to build cyrus-makedepend ; stop if none of the 3 works.
261    o pkg/exf & pkg/thsice:
262      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
263        for energy content of Precip + RunOff & Evap. Assumes:
264       1) Rain has same temp as Air.
265       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
266       3) Run-Off comes at the temp of surface water (with same Cp)
267       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
268        put directly into Latent Heat flux & should use water-vapor heat capacity.
269       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
270        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
271    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
272        (compile when SEAICE_ALLOW_JFNK is defined)
273    o pkg/thsice:
274      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
275        implementation): move THSICE_AVE call after the advection (called directly
276        from thsice_do_advect.F).
277    o verification/global_ocean.90x40x15 and OpenAD:
278      New experiment for OpenAD is identical to the one in input_ad except that
279        multiDimAdvection=.FALSE.,
280      There is still an issue with this.
281    o pkg/thsice:
282      - account for ice velocity (ocean relative velocity) in turbulent heat flux
283        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
284        and offline_exf_seaice (main test).
285    
286    checkpoint64f (2013/03/31)
287    o verification/OpenAD:
288      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
289    o verification/isomip, pkg/shelfice and OpenAD:
290      - add OpenAD setup to this exp and make shelfice package work with OpenAD
291    o verification/tutorial_global_oce_biogeo:
292      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
293    o verification/offline_exf_seaice:
294      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
295    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
296      - add OpenAD setup to this exp and make ptracers package work with OpenAD
297    o pkg/seaice/seaice_evp.F:
298       mask the asymmetric contribution of the ice-ocean stress (when
299       the turningAngle is non-zero) over open water to avoid stripes
300       in the EVP-solutions after many EVP-substeps. This does not change
301       the verification experiment (because turningAngle=0 in that experiment),
302       but will affect other EVP solutions with turningAngle.ne.0
303    o verification, AD & TLM output:
304      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
305        additions and multiplications which affect results at machine truncation
306        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
307        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
308        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
309        digits of matching.
310    o pkg/seaice:
311       modify lsr-algorithm so that it vectorizes AND converges by using a
312       "zebra" method: split vector loop into two with step size 2; this
313       solves a general convergence problem for the JFNK solver on a vector
314       computer. It has the potential to even improve convergence for
315       non-vector machines, but it does change the results so it is turned
316       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
317       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
318    
319    checkpoint64e (2013/03/05)
320    o pkg/ecco and several verification experiments:
321       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
322       from ecco package, and revert to unified routine in model/src/
323       Adjust verification experiments accordingly, especially gloal_oce_llc90
324       Should conclude long-standing work by Gael to reconsile the_main_loop with
325       ECCO and will enable OpenAD's revolve loop in ECCO setup.
326    o pkg/generic_advdiff:
327      - implement compressible flow method for multi-dim advection (similar to
328        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
329        TAF generates many recomputations) to use it; no yet coded with implicit
330        vertical advection.
331      - change experiment advect_cs (new output) and advect_xy (same output)
332        to test compressible flow multi-dim advection.
333    o pkg/generic_advdiff:
334      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
335        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
336    o pkg/seaice:
337      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
338        bug affects two verification experiments (lab_sea and lab_sea.hb87),
339        recover old (wrong) results by setting noSlipFac = 2. in
340        seaice_calc_strainrates.F;
341      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
342      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
343        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
344      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
345    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
346      - new subroutines seaice_lsr_tridiagu/v
347      - introduce loop bounds i/jmin/max to be able to use a restricted
348        additive Schwarz method, but not used for now.
349      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
350      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
351    o OpenAD support
352       Reorganize S/R call for overall time-stepping loop to facilitate
353       OpenAD revolve loop replacement
354       (new S/R main_do_loop.F)
355    o model/src:
356      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
357      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
358        ADAMS_BASHFORTH2.
359    o pkg/cheapaml:
360      - add new parameter (default=F, same as before) to disable full domain
361        (including land) periodicity in X & Y dir.
362      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
363        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
364        into single S/R CHEAPAML_TIMESTEP.
365    
366    checkpoint64d (2013/02/17)
367    o pkg/monitor (angular momentum):
368      - do not add Eta contribution to the total AM if using rigid-lid;
369      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
370      - horizontal discretisation: compute Zonal wind contribution separately for
371        each component (instead of from cell centered averaged) and use the 4
372        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
373      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
374        FreeSurf) if using vectorInvariant momentum.
375    o model/src (horizontal grid):
376      - move initialisation of all horizontal grid arrays to null value
377        from specific horizontal grid S/R to main S/R INI_GRID;
378      - add 2 new arrays to project model C-grid velocity on to zonal direction
379        (similar to AngleCosC & -AngleSinC but at U and V point location) and
380        compute them in S/R CALC_GRID_ANGLES.
381    o pkg/seaice: replace a hard coded parameter by a runtime parameter
382        SEAICE_JFNK_tolIter
383    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
384        preconditioner for JFNK (run LSR into the overlaps as far as possible,
385        i.e OLx/y-2, but overwrite the solution in the overlaps)
386      - extend loop range in seaice_calc_viscosity
387      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
388      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
389      - slightly modify loops in tridiagonal solver lsr-preconditioner
390      - by default remove the extra exchange in seaice_preconditioner with a
391        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
392      - modify offline_exf_seaice so that old results without RAS are reproduced
393        for output.dyn_jfnk.txt
394      in seaice_fgmres.F (unrelated to RAS)
395      - add a cpp-flag option for a re-ordered mapping (potentially more
396        efficient), but because this changes the results, turn it off by
397        default
398      - replace the save statement by local common blocks
399    o utils/matlab:
400      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
401      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
402        instead of local script "load_cs.m".
403    o pkg/seaice:
404      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
405        to the scalarProductMetric and the unrolling. By chance this does not
406        change the verification experiment, because of the particular domain
407        decomposition
408    o pkg/diagnostics:
409      - change default missing_value from UNSET_RL to -999.
410    o pkg/layers: improve vectorization of layers_fluxcalc.F
411      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
412        time spent in this routine by more than a factor of 3 on an NEC-SX8
413      - step 2: replace search algorithm by a bisection algorithm found in
414        Press et al. Numerical Recipes in Fortran. This algorithm can be
415        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
416        For now, use this algorithm only for TARGET_NEC_SX defined.
417      - moved the search algorithm into a separate subroutine, that is kept
418        within the same file for automatic inlining.
419      - modified catching potential errors
420    o pkg/ecco:
421      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
422    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
423      - modifications for ALLOW_GENTIM2D_CONTROL
424      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
425      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
426      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
427      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
428    o model/src:
429      - account for moist thermodynamics in (dry) potential temperature equation;
430        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
431        and cpl_aim+ocn.
432      - also switch to standard compiler (gfortran, was using ifort previously)
433        for fizhi-cs experiments reference output.
434    o pkg/ctrl:
435      - 1st step toward generic time-varying control variable (2D) via CPP option
436        ALLOW_GENTIM2D_CONTROL
437      - note new namelist ctrl_nml_genarr in data.ctrl
438    o verification/global_ocean.cs32x15:
439      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
440        thsice calling sequence and update "output.icedyn.txt" output file.
441    o pkg/ptracers:
442      - from Ryan A.: code to allow to restart a tracer at regular time interval
443        specifying a reset frequency and a reset-phase (for each tracers).
444    o pkg/thsice:
445      - implement new sequence of calls for thsice+seaice:
446          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
447          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
448      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
449        in CPP_OPTIONS.h) to recover old sequence;
450      - update diagnostics for Intermediate State thsice diagnostics: now filled
451        just before advection (instead of just after advection in old sequence);
452      - update output of experiment offline_exf_seaice (standard test);
453      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
454        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
455    o pkg/aim_v23:
456      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
457      - use standard pkg/mdsio routines to read & write CO2 pickup file;
458      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
459      - Implement new sequence of calls for seaice advection (with thsice and
460        seaice diffusion): do ice advection after ice-Thermodynamic (previously
461        was done before); change aim_do_physics.F (split the bi,bj loops block);
462      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
463    o pkg/thsice:
464      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
465        where just seaice diffusion is used without seaice-dynamics.
466    
467    checkpoint64c (2013/01/18)
468    o pkg/seaice:
469      - add a parameter JFNKres_tFac that can replace JFNKres_t
470        (= JFNKres_tFac*JFNKresidual before JFNK solver)
471      - add a line search option to the JFNK solver
472      - move update of u/vIce and computation of initial residual into a separate
473        routine (same file); makes the code a little easier to read (?)
474      - the line search requires computation of the residual and for some reason
475        I cannot do the update of u/vIce at the beginning of the Newton loop
476        without changing the results, so we move computation of the new residual
477        also to the end of the Newton loop, even without the line search
478    o pkg/mdsio:
479      - write missing value (corresponding to undefined array value) to meta files;
480        skip this if missing value is one (UNSET_RL would be a better value for the
481        case of undefined missing value but it's current the default missing-value);
482        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
483    o pkg/exf & thsice:
484      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
485        diagnostics) even when SHORTWAVE_HEATING is #undef;
486    o verification/cfc_example:
487      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
488        illustrate how to use it).
489    o verification/offline_exf_seaice:
490      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
491        files to only one time-record.
492      in input.thermo: narrow the 2 bands of low initial ice-concentration near
493        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
494        snapshot output; same mcPheePiston value as in thsice with
495        surf-current=0.2m/s.
496      in input.thsice: similar set-up as in input.thermo (channel with same seaice
497        initial conditions).
498    o verification/cfc_example:
499      - update file "data" with more standard choice (default rotationPeriod,
500        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
501        set deltaTFreeSurf to deltaTtracer) and update the output.
502    o pkg/layers:
503      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
504      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
505    o verification/offline_exf_seaice:
506      - set all {field}period to zero for constant-in-time forcing (not tested
507        anywhere else).
508    o verification/offline_exf_seaice:
509      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
510      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
511    o model/src:
512      - implement Finite-Volume method for (hydrostatic) presure gradient
513        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
514    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
515      - In order to be compatible with the default EVP code, this requires changing
516        the EVP code around a little; and because any small change immediately
517        breaks the lab_sea.hb87 verification experiment, the reference output is
518        updated two times (each time the remaining aggrement was only 2 digits):
519        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
520        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
521        The adjoint test lab_sea.evp also needed to be updated.
522      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
523        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
524        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
525        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
526        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
527        kept obscure, because I need to test it a little more.
528    o pkg/cheapaml:
529      - fix few incorrect type (_RL/_RS) in subroutine calls.
530    o pkg/seaice:
531      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
532        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
533    o model/src:
534      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
535        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
536        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
537    o pkg/cheapaml:
538      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
539        update output of experiment cheapAML_box.
540      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
541        and set them only in one place (cheapaml_readparms.F).
542      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
543      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
544        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
545    o model/src/the_main_loop.F:
546      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
547    o pkg/seaice:
548      - remove legacy branch code.
549      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
550    o verification/*/code*/SEAICE_OPTIONS.h:
551      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
552        SEAICE_CAP_HEFF).
553    o pkg/cheapaml:
554      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
555        to load new forcing fields.
556      - add missing "_d 0" where it's needed; + some editing (improve indentation).
557      - remove switch to "-r8" compiler option (no longer needed) in verification
558        cheapAML_box, keep same output (small trucation error differences).
559    o verification/offline_exf_seaice:
560      - add thermodynamics only test.
561    o verification/cheapAML_box:
562      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
563        keep same output (same 14 digits for cg2d).
564      - switch on "-r8" compiler option (some numerical values are missing
565        the "_d 0") and update output (only 6 digits for cg2d were preserved).
566    
567    checkpoint64b (2012/12/24)
568    o pkg/cheapaml:
569      - remove un-used variables (Qnet,EmPmR) from pickup files.
570      - store tendency of advected variables into cheapaml pickup file
571        and fix the AB-2 restart.
572    o verification/offline_exf_seaice and lab_sea adjoint:
573      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
574      - switch to 4 time steps in offline, consistent with lab_sea.
575      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
576      - update results after change of experiment seaice.
577    o pkg/seaice:
578      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
579        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
580        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
581        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
582    o model/src:
583      - add run-time parameter to select CG2D solver minimum-residual solution
584        (in case of a poor convergence).
585    o pkg/seaice/seaice_lsr.F
586      - move calculation of matrix coefficients into new
587        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
588        file; the main purpose of this change is to be able to reuse the code
589        in S/R SEAICE_PRECONDITIONER
590      - modify the computation of the residual so that the mass of sea-ice
591        is not used twice; this simplifies the calculations, but since
592        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
593        not tested in testreport---this does not affect the testreport results.
594    o verification/seaice_obcs:
595      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
596        verification/lab_sea/input.salt_plume; changes results/output.txt*
597    o model/src:
598      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
599    o pkg/seaice:
600      - improve description of parameters in seaice_fgmres.F and start
601        cleaning up the code
602      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
603        second argument
604      - add a metric based on grid cell area to SEAICE_SCALPROD; update
605        results of offline_exf_seaice.dyn_jfnk
606      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
607    o pkg/aim_v23:
608      - fix an other bug in dissipation heating (grid-cell area was missing).
609    o model/src + pkg/seaice:
610      - add global (multi-tile) linear solver for pair of tri-diagonal system
611        along X and Y lines, respectively for U and V component.
612        Note: 1) MPI and cube-exchange not yet coded.
613            2) probably not accurate for poorly conditioned / large size problem.
614      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
615        default: not compiled and not used.
616    o pkg/seaice:
617      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
618        introduce bi/bj loops and use global_sum_tile_rl instead of
619        mpi_allreduce in seaice_fgmres.F
620      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
621      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
622      - add a verification experiment for JFNK in offline_exf_seaice
623    o verification:
624      - change (for now, only fwd test) offline_exf_seaice experiment:
625        use a re-entrant channel with idealized coastline (trapezoidal shape)
626        at southern boundary to explore seaice dynamics and thermodynamics
627        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
628        secondary test (input.thsice) use thermodynamics only with SST relaxation.
629      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
630    o pkg/exf:
631      - disable "sstExtrapol" when Nr=1
632    o verification:
633      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
634        to test pkg/cheapaml.
635    o pkg/aim_v23 & pkg/shap_filt:
636      - fix dissipation heating (erroneous gravity multiplication factor).
637    o pkg/seaice:
638      - remove unused field pressPre from jfnk solver
639      - rename two subroutines in seaice_preconditioner.F
640    o eesupp/src:
641       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
642    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
643       - remove wrong parts of the rhs and the lhs (were in there
644         because I did not understand the concept of this preconditioner)
645       - add an exchange between u- and v-sweep. This increases communication
646         by a factor of two but improves the convergence of jfnk. Ideally,
647         one would like the u- and v-sweep to be independent. So far within
648         undocumented ifdefs
649       - reorganize the extra computations for printing the residuals
650    o tools/genmake2:
651      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
652        since it's not necessary (and was preventing to use MNC in some cases).
653    
654    checkpoint64a (2012/11/16)
655    o pkg/autodiff:
656      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
657        autodiff_readparms.F no longer depends on calling order (within
658        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
659        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
660        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
661    o pkg/obcs:
662      - adding tidal velocity forcing capability to obcs
663        for usage example, see verification/seaice_obcs/input.tides
664    o pkg/seaice:
665      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
666        SEAICE_LSRrelaxU/V
667      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
668    o pkg/aim_v23:
669      - implement heating from friction (bottom friction and stratospheric drag).
670    o pkg/shap_filt:
671      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
672        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
673    o model/src:
674      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
675        time-constant addMass field from file (addMassFile);
676      - support for heating due to friction (and Kinetic Energy dissipation):
677        add option, run-time switch and 3-D field array + support code ; each pkg
678        or S/R can add heating contribution (if there is a sink of KE); the sum is
679        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
680    o pkg/seaice:
681      - complete merge of ITD code into seaice_growth.F
682        from MITgcm_contrib/torge/itd/code/
683        no verification so far, but Torge Martin tested
684        "1-D test case and Beaufort set up;
685        deliver okay results after 1 model year."
686      - complete merge of SEAICE_SIZE.h into all relevant routines
687      - move computation of eta at Z-points into calc_viscosities
688        + introduce global field etaZ
689        + add different methods for computing etaZ, for now the old
690          method (simple averages of eta to Z-points) is hardwired
691        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
692          seaice_preconditioner
693      - simplify computations for SEAICE_ZETA_SMOOTHREG
694      - seaice_preconditioner:
695        + replace one remaining press by pressLoc (mistake)
696        + adjust printing of residuals
697      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
698        + add (SEAICE.h) and rename some counters (initiliased in
699          seaice_init_fixed.F)
700        + add _BEGIN/END_MASTER (myThid)  around print statements
701        + print total number of iterations and failures over SEAICE_monFreq
702          interval to STDOUT
703      - move control over output-messages by fgmres to seaice_jfnk to save
704        some operations
705      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
706        in order to make restarts with sol .ne. zero (fgmres with restarts)
707        (seaice_jfnk.F, seaice_fgmres.F)
708      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
709        a serious convergence problem when open boundaries are involved
710    o pkg/ggl90: fix computation of control volumes for the case of
711      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
712      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
713    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
714    o pkg/autodiff
715      - Add inAdMode switch for SEAICEuseDYNAMICS:
716        SEAICEuseDYNAMICSinAdMode
717        (extend logic in ADAUTODIFF_INADMODE_SET)
718    o pkg/seaice
719      - Step 1 of merging ice-thickness distribution (ITD) code from
720        MITgcm_contrib/torge/itd/ (author: Torge Martin)
721        The code implements concept laid out in Thorndike et al. (1975);
722        code is enabled via CPP flag SEAICE_ITD
723        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
724        code is not complete yet!!
725      - SEAICE_SIZE.h now included in almost all seaice routines
726    o verification (using seaice):
727      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
728        global_ocean.cs32x15.seaice ; update results.
729      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
730      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
731        offline_exf_seaice (previously compiling B-grid).
732    o pkg/exf:
733      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
734        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
735        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
736    o pkg/layers (adjust changes from Sept 19):
737      - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
738        this allows to remove "layers_maxNum" dimension from all layers arrays.
739    o pkg/layers (adjust changes from Sept 19):
740      - remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ;
741      - snap-shot extended to all type of layers (not just the 1rst type);
742      - remove layers variables when corresponding CPP option is undef.
743    o pkg/layers:
744      - rename pkg/layers variable and add new output (layer exist & un-weighted
745        velocity in layer)
746    o pkg/seaice:
747      - simplify (?) ocean-drag coefficent computations by using
748        the same routine in all three solvers (saves some code lines)
749      - remove global fields DRAGA and DRAGS from C-grid code and
750        declare them locally in lsr.F (the only place where they are
751        still used)
752      - update AD output of lab_sea.evp (very sensitive anyway).
753    o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
754      (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
755      and SEAICEuseJFNK=.true. A few things to note:
756      - involves a FGMRES, that is parallel but very inefficient,
757        because of many scalar products (global sums) in the Gram-Schmidt
758        orthogonalization method. Needs to be replaced. Original code
759        from J.-F. Lemieux
760      - preconditioner for FGMRES is a stripped down version of LSOR
761      - SOLV_MAX_ITERS is now used for LSOR as a solver and as a
762        preconditioner. For the preconditioner, the default is set to 10.
763      - Jacobian times vector is computed with finite differences
764      - marginally related to JFNK-solver: add a smooth regularization for
765        zeta with tanh that will improve convergence (Lemieux and Tremblay,
766        2009) for any implicit solver (not implemented for EVP because EVP
767        does not need this regularization in the first place). Define
768        SEAICE_ZETA_SMOOTHREG in SEAICE_OPTIONS.h to use.
769    o eesupp/src:
770      - check in genmake2 that intrinsic S/R flush is available.
771      - add S/R to flush IO unit (if intrinsic S/R flush is available)
772      - flush standard & error msg unit before MPI termination
773      - if debugMode, flush IO unit after printing msg
774    o pkg/ctrl:
775      - ctrl_unpack.F, ALLOW_GENARR3D_CONTROL code: fix missing argument in call
776        to ctrl_set_unpack_xyz.
777    
778    checkpoint64 (2012/10/09)
779    o pkg/shelfice
780      - in mom_fluxform.F, mom_vecinv.F:
781        CALL SHELFICE_V_DRAG(bi,bj,k,vFld,KE,KappaRU,vF,myThid)
782        Bug fix KappaRU -> KappaRV
783        does not change verification/isomip but may change other setups
784        (presumably constant KappaRU=KappaRV)
785      - fix diagnostics SHIU/Vdrag (thanks to Tom Millgate)
786    o pkg/obcs:
787      - fixed some indexing bugs in obcs_seaice_sponge.F
788      - added obcs relaxation subroutines for HSALT and HSNOW
789      - changes verification/seaice_obcs/results/obcs_seaice_sponge.F
790  o pkg/seaice:  o pkg/seaice:
791    - add "multicategory" parameterization for snow in analogy to ice,    - add "multicategory" parameterization for snow in analogy to ice,
792      default is off for now.      default is off for now.

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