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revision 1.1777 by jmc, Fri Nov 30 22:31:27 2012 UTC revision 1.1852 by jmc, Mon Apr 8 23:46:37 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/cd_code:
8      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
9        experiment lab_sea.hb87
10    o tools/genmake2:
11      - change default makedepend from the system default to tools/xmakedepend:
12        When no makedepend is specified, select tools/xmakedepend it the test pass,
13        otherwise select the system default (if exist and pass the test) or
14        try to build cyrus-makedepend ; stop if none of the 3 works.
15    o pkg/exf & pkg/thsice:
16      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
17        for energy content of Precip + RunOff & Evap. Assumes:
18       1) Rain has same temp as Air.
19       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
20       3) Run-Off comes at the temp of surface water (with same Cp)
21       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
22        put directly into Latent Heat flux & should use water-vapor heat capacity.
23       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
24        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
25    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
26        (compile when SEAICE_ALLOW_JFNK is defined)
27    o pkg/thsice:
28      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
29        implementation): move THSICE_AVE call after the advection (called directly
30        from thsice_do_advect.F).
31    o verification/global_ocean.90x40x15 and OpenAD:
32      New experiment for OpenAD is identical to the one in input_ad except that
33        multiDimAdvection=.FALSE.,
34      There is still an issue with this.
35    o pkg/thsice:
36      - account for ice velocity (ocean relative velocity) in turbulent heat flux
37        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
38        and offline_exf_seaice (main test).
39    
40    checkpoint64f (2013/03/31)
41    o verification/OpenAD:
42      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
43    o verification/isomip, pkg/shelfice and OpenAD:
44      - add OpenAD setup to this exp and make shelfice package work with OpenAD
45    o verification/tutorial_global_oce_biogeo:
46      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
47    o verification/offline_exf_seaice:
48      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
49    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
50      - add OpenAD setup to this exp and make ptracers package work with OpenAD
51    o pkg/seaice/seaice_evp.F:
52       mask the asymmetric contribution of the ice-ocean stress (when
53       the turningAngle is non-zero) over open water to avoid stripes
54       in the EVP-solutions after many EVP-substeps. This does not change
55       the verification experiment (because turningAngle=0 in that experiment),
56       but will affect other EVP solutions with turningAngle.ne.0
57    o verification, AD & TLM output:
58      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
59        additions and multiplications which affect results at machine truncation
60        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
61        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
62        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
63        digits of matching.
64    o pkg/seaice:
65       modify lsr-algorithm so that it vectorizes AND converges by using a
66       "zebra" method: split vector loop into two with step size 2; this
67       solves a general convergence problem for the JFNK solver on a vector
68       computer. It has the potential to even improve convergence for
69       non-vector machines, but it does change the results so it is turned
70       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
71       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
72    
73    checkpoint64e (2013/03/05)
74    o pkg/ecco and several verification experiments:
75       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
76       from ecco package, and revert to unified routine in model/src/
77       Adjust verification experiments accordingly, especially gloal_oce_llc90
78       Should conclude long-standing work by Gael to reconsile the_main_loop with
79       ECCO and will enable OpenAD's revolve loop in ECCO setup.
80    o pkg/generic_advdiff:
81      - implement compressible flow method for multi-dim advection (similar to
82        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
83        TAF generates many recomputations) to use it; no yet coded with implicit
84        vertical advection.
85      - change experiment advect_cs (new output) and advect_xy (same output)
86        to test compressible flow multi-dim advection.
87    o pkg/generic_advdiff:
88      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
89        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
90    o pkg/seaice:
91      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
92        bug affects two verification experiments (lab_sea and lab_sea.hb87),
93        recover old (wrong) results by setting noSlipFac = 2. in
94        seaice_calc_strainrates.F;
95      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
96      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
97        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
98      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
99    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
100      - new subroutines seaice_lsr_tridiagu/v
101      - introduce loop bounds i/jmin/max to be able to use a restricted
102        additive Schwarz method, but not used for now.
103      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
104      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
105    o OpenAD support
106       Reorganize S/R call for overall time-stepping loop to facilitate
107       OpenAD revolve loop replacement
108       (new S/R main_do_loop.F)
109    o model/src:
110      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
111      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
112        ADAMS_BASHFORTH2.
113    o pkg/cheapaml:
114      - add new parameter (default=F, same as before) to disable full domain
115        (including land) periodicity in X & Y dir.
116      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
117        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
118        into single S/R CHEAPAML_TIMESTEP.
119    
120    checkpoint64d (2013/02/17)
121    o pkg/monitor (angular momentum):
122      - do not add Eta contribution to the total AM if using rigid-lid;
123      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
124      - horizontal discretisation: compute Zonal wind contribution separately for
125        each component (instead of from cell centered averaged) and use the 4
126        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
127      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
128        FreeSurf) if using vectorInvariant momentum.
129    o model/src (horizontal grid):
130      - move initialisation of all horizontal grid arrays to null value
131        from specific horizontal grid S/R to main S/R INI_GRID;
132      - add 2 new arrays to project model C-grid velocity on to zonal direction
133        (similar to AngleCosC & -AngleSinC but at U and V point location) and
134        compute them in S/R CALC_GRID_ANGLES.
135    o pkg/seaice: replace a hard coded parameter by a runtime parameter
136        SEAICE_JFNK_tolIter
137    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
138        preconditioner for JFNK (run LSR into the overlaps as far as possible,
139        i.e OLx/y-2, but overwrite the solution in the overlaps)
140      - extend loop range in seaice_calc_viscosity
141      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
142      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
143      - slightly modify loops in tridiagonal solver lsr-preconditioner
144      - by default remove the extra exchange in seaice_preconditioner with a
145        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
146      - modify offline_exf_seaice so that old results without RAS are reproduced
147        for output.dyn_jfnk.txt
148      in seaice_fgmres.F (unrelated to RAS)
149      - add a cpp-flag option for a re-ordered mapping (potentially more
150        efficient), but because this changes the results, turn it off by
151        default
152      - replace the save statement by local common blocks
153    o utils/matlab:
154      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
155      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
156        instead of local script "load_cs.m".
157    o pkg/seaice:
158      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
159        to the scalarProductMetric and the unrolling. By chance this does not
160        change the verification experiment, because of the particular domain
161        decomposition
162    o pkg/diagnostics:
163      - change default missing_value from UNSET_RL to -999.
164    o pkg/layers: improve vectorization of layers_fluxcalc.F
165      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
166        time spent in this routine by more than a factor of 3 on an NEC-SX8
167      - step 2: replace search algorithm by a bisection algorithm found in
168        Press et al. Numerical Recipes in Fortran. This algorithm can be
169        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
170        For now, use this algorithm only for TARGET_NEC_SX defined.
171      - moved the search algorithm into a separate subroutine, that is kept
172        within the same file for automatic inlining.
173      - modified catching potential errors
174    o pkg/ecco:
175      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
176    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
177      - modifications for ALLOW_GENTIM2D_CONTROL
178      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
179      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
180      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
181      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
182    o model/src:
183      - account for moist thermodynamics in (dry) potential temperature equation;
184        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
185        and cpl_aim+ocn.
186      - also switch to standard compiler (gfortran, was using ifort previously)
187        for fizhi-cs experiments reference output.
188    o pkg/ctrl:
189      - 1st step toward generic time-varying control variable (2D) via CPP option
190        ALLOW_GENTIM2D_CONTROL
191      - note new namelist ctrl_nml_genarr in data.ctrl
192    o verification/global_ocean.cs32x15:
193      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
194        thsice calling sequence and update "output.icedyn.txt" output file.
195    o pkg/ptracers:
196      - from Ryan A.: code to allow to restart a tracer at regular time interval
197        specifying a reset frequency and a reset-phase (for each tracers).
198    o pkg/thsice:
199      - implement new sequence of calls for thsice+seaice:
200          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
201          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
202      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
203        in CPP_OPTIONS.h) to recover old sequence;
204      - update diagnostics for Intermediate State thsice diagnostics: now filled
205        just before advection (instead of just after advection in old sequence);
206      - update output of experiment offline_exf_seaice (standard test);
207      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
208        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
209    o pkg/aim_v23:
210      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
211      - use standard pkg/mdsio routines to read & write CO2 pickup file;
212      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
213      - Implement new sequence of calls for seaice advection (with thsice and
214        seaice diffusion): do ice advection after ice-Thermodynamic (previously
215        was done before); change aim_do_physics.F (split the bi,bj loops block);
216      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
217    o pkg/thsice:
218      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
219        where just seaice diffusion is used without seaice-dynamics.
220    
221    checkpoint64c (2013/01/18)
222    o pkg/seaice:
223      - add a parameter JFNKres_tFac that can replace JFNKres_t
224        (= JFNKres_tFac*JFNKresidual before JFNK solver)
225      - add a line search option to the JFNK solver
226      - move update of u/vIce and computation of initial residual into a separate
227        routine (same file); makes the code a little easier to read (?)
228      - the line search requires computation of the residual and for some reason
229        I cannot do the update of u/vIce at the beginning of the Newton loop
230        without changing the results, so we move computation of the new residual
231        also to the end of the Newton loop, even without the line search
232    o pkg/mdsio:
233      - write missing value (corresponding to undefined array value) to meta files;
234        skip this if missing value is one (UNSET_RL would be a better value for the
235        case of undefined missing value but it's current the default missing-value);
236        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
237    o pkg/exf & thsice:
238      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
239        diagnostics) even when SHORTWAVE_HEATING is #undef;
240    o verification/cfc_example:
241      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
242        illustrate how to use it).
243    o verification/offline_exf_seaice:
244      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
245        files to only one time-record.
246      in input.thermo: narrow the 2 bands of low initial ice-concentration near
247        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
248        snapshot output; same mcPheePiston value as in thsice with
249        surf-current=0.2m/s.
250      in input.thsice: similar set-up as in input.thermo (channel with same seaice
251        initial conditions).
252    o verification/cfc_example:
253      - update file "data" with more standard choice (default rotationPeriod,
254        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
255        set deltaTFreeSurf to deltaTtracer) and update the output.
256    o pkg/layers:
257      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
258      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
259    o verification/offline_exf_seaice:
260      - set all {field}period to zero for constant-in-time forcing (not tested
261        anywhere else).
262    o verification/offline_exf_seaice:
263      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
264      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
265    o model/src:
266      - implement Finite-Volume method for (hydrostatic) presure gradient
267        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
268    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
269      - In order to be compatible with the default EVP code, this requires changing
270        the EVP code around a little; and because any small change immediately
271        breaks the lab_sea.hb87 verification experiment, the reference output is
272        updated two times (each time the remaining aggrement was only 2 digits):
273        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
274        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
275        The adjoint test lab_sea.evp also needed to be updated.
276      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
277        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
278        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
279        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
280        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
281        kept obscure, because I need to test it a little more.
282    o pkg/cheapaml:
283      - fix few incorrect type (_RL/_RS) in subroutine calls.
284    o pkg/seaice:
285      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
286        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
287    o model/src:
288      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
289        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
290        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
291    o pkg/cheapaml:
292      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
293        update output of experiment cheapAML_box.
294      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
295        and set them only in one place (cheapaml_readparms.F).
296      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
297      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
298        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
299    o model/src/the_main_loop.F:
300      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
301    o pkg/seaice:
302      - remove legacy branch code.
303      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
304    o verification/*/code*/SEAICE_OPTIONS.h:
305      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
306        SEAICE_CAP_HEFF).
307    o pkg/cheapaml:
308      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
309        to load new forcing fields.
310      - add missing "_d 0" where it's needed; + some editing (improve indentation).
311      - remove switch to "-r8" compiler option (no longer needed) in verification
312        cheapAML_box, keep same output (small trucation error differences).
313    o verification/offline_exf_seaice:
314      - add thermodynamics only test.
315    o verification/cheapAML_box:
316      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
317        keep same output (same 14 digits for cg2d).
318      - switch on "-r8" compiler option (some numerical values are missing
319        the "_d 0") and update output (only 6 digits for cg2d were preserved).
320    
321    checkpoint64b (2012/12/24)
322    o pkg/cheapaml:
323      - remove un-used variables (Qnet,EmPmR) from pickup files.
324      - store tendency of advected variables into cheapaml pickup file
325        and fix the AB-2 restart.
326    o verification/offline_exf_seaice and lab_sea adjoint:
327      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
328      - switch to 4 time steps in offline, consistent with lab_sea.
329      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
330      - update results after change of experiment seaice.
331    o pkg/seaice:
332      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
333        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
334        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
335        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
336    o model/src:
337      - add run-time parameter to select CG2D solver minimum-residual solution
338        (in case of a poor convergence).
339    o pkg/seaice/seaice_lsr.F
340      - move calculation of matrix coefficients into new
341        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
342        file; the main purpose of this change is to be able to reuse the code
343        in S/R SEAICE_PRECONDITIONER
344      - modify the computation of the residual so that the mass of sea-ice
345        is not used twice; this simplifies the calculations, but since
346        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
347        not tested in testreport---this does not affect the testreport results.
348    o verification/seaice_obcs:
349      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
350        verification/lab_sea/input.salt_plume; changes results/output.txt*
351    o model/src:
352      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
353    o pkg/seaice:
354      - improve description of parameters in seaice_fgmres.F and start
355        cleaning up the code
356      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
357        second argument
358      - add a metric based on grid cell area to SEAICE_SCALPROD; update
359        results of offline_exf_seaice.dyn_jfnk
360      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
361    o pkg/aim_v23:
362      - fix an other bug in dissipation heating (grid-cell area was missing).
363    o model/src + pkg/seaice:
364      - add global (multi-tile) linear solver for pair of tri-diagonal system
365        along X and Y lines, respectively for U and V component.
366        Note: 1) MPI and cube-exchange not yet coded.
367            2) probably not accurate for poorly conditioned / large size problem.
368      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
369        default: not compiled and not used.
370    o pkg/seaice:
371      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
372        introduce bi/bj loops and use global_sum_tile_rl instead of
373        mpi_allreduce in seaice_fgmres.F
374      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
375      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
376      - add a verification experiment for JFNK in offline_exf_seaice
377    o verification:
378      - change (for now, only fwd test) offline_exf_seaice experiment:
379        use a re-entrant channel with idealized coastline (trapezoidal shape)
380        at southern boundary to explore seaice dynamics and thermodynamics
381        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
382        secondary test (input.thsice) use thermodynamics only with SST relaxation.
383      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
384    o pkg/exf:
385      - disable "sstExtrapol" when Nr=1
386    o verification:
387      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
388        to test pkg/cheapaml.
389  o pkg/aim_v23 & pkg/shap_filt:  o pkg/aim_v23 & pkg/shap_filt:
390    - fix dissipation heating (erroneous gravity multiplication factor).    - fix dissipation heating (erroneous gravity multiplication factor).
391  o pkg/seaice:  o pkg/seaice:

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