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revision 1.1752 by jmc, Fri Oct 19 15:43:07 2012 UTC revision 1.1815 by heimbach, Sat Jan 26 14:52:11 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/ctrl
8      - 1st step toward generic time-varying control variable (2D) via CPP option
9        ALLOW_GENTIM2D_CONTROL
10      - note new namelist ctrl_nml_genarr in data.ctrl
11    o verification/global_ocean.cs32x15:
12      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
13        thsice calling sequence and update "output.icedyn.txt" output file.
14    o pkg/ptracers:
15      - from Ryan A.: code to allow to restart a tracer at regular time interval
16        specifying a reset frequency and a reset-phase (for each tracers).
17    o pkg/thsice:
18      - implement new sequence of calls for thsice+seaice:
19          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
20          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
21      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
22        in CPP_OPTIONS.h) to recover old sequence;
23      - update diagnostics for Intermediate State thsice diagnostics: now filled
24        just before advection (instead of just after advection in old sequence);
25      - update output of experiment offline_exf_seaice (standard test);
26      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
27        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
28    o pkg/aim_v23:
29      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
30      - use standard pkg/mdsio routines to read & write CO2 pickup file;
31      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
32      - Implement new sequence of calls for seaice advection (with thsice and
33        seaice diffusion): do ice advection after ice-Thermodynamic (previously
34        was done before); change aim_do_physics.F (split the bi,bj loops block);
35      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
36    o pkg/thsice:
37      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
38        where just seaice diffusion is used without seaice-dynamics.
39    
40    checkpoint64c (2013/01/18)
41    o pkg/seaice:
42      - add a parameter JFNKres_tFac that can replace JFNKres_t
43        (= JFNKres_tFac*JFNKresidual before JFNK solver)
44      - add a line search option to the JFNK solver
45      - move update of u/vIce and computation of initial residual into a separate
46        routine (same file); makes the code a little easier to read (?)
47      - the line search requires computation of the residual and for some reason
48        I cannot do the update of u/vIce at the beginning of the Newton loop
49        without changing the results, so we move computation of the new residual
50        also to the end of the Newton loop, even without the line search
51    o pkg/mdsio:
52      - write missing value (corresponding to undefined array value) to meta files;
53        skip this if missing value is one (UNSET_RL would be a better value for the
54        case of undefined missing value but it's current the default missing-value);
55        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
56    o pkg/exf & thsice:
57      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
58        diagnostics) even when SHORTWAVE_HEATING is #undef;
59    o verification/cfc_example:
60      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
61        illustrate how to use it).
62    o verification/offline_exf_seaice:
63      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
64        files to only one time-record.
65      in input.thermo: narrow the 2 bands of low initial ice-concentration near
66        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
67        snapshot output; same mcPheePiston value as in thsice with
68        surf-current=0.2m/s.
69      in input.thsice: similar set-up as in input.thermo (channel with same seaice
70        initial conditions).
71    o verification/cfc_example:
72      - update file "data" with more standard choice (default rotationPeriod,
73        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
74        set deltaTFreeSurf to deltaTtracer) and update the output.
75    o pkg/layers:
76      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
77      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
78    o verification/offline_exf_seaice:
79      - set all {field}period to zero for constant-in-time forcing (not tested
80        anywhere else).
81    o verification/offline_exf_seaice:
82      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
83      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
84    o model/src:
85      - implement Finite-Volume method for (hydrostatic) presure gradient
86        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
87    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
88      - In order to be compatible with the default EVP code, this requires changing
89        the EVP code around a little; and because any small change immediately
90        breaks the lab_sea.hb87 verification experiment, the reference output is
91        updated two times (each time the remaining aggrement was only 2 digits):
92        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
93        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
94        The adjoint test lab_sea.evp also needed to be updated.
95      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
96        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
97        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
98        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
99        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
100        kept obscure, because I need to test it a little more.
101    o pkg/cheapaml:
102      - fix few incorrect type (_RL/_RS) in subroutine calls.
103    o pkg/seaice:
104      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
105        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
106    o model/src:
107      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
108        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
109        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
110    o pkg/cheapaml:
111      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
112        update output of experiment cheapAML_box.
113      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
114        and set them only in one place (cheapaml_readparms.F).
115      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
116      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
117        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
118    o model/src/the_main_loop.F:
119      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
120    o pkg/seaice:
121      - remove legacy branch code.
122      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
123    o verification/*/code*/SEAICE_OPTIONS.h:
124      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
125        SEAICE_CAP_HEFF).
126    o pkg/cheapaml:
127      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
128        to load new forcing fields.
129      - add missing "_d 0" where it's needed; + some editing (improve indentation).
130      - remove switch to "-r8" compiler option (no longer needed) in verification
131        cheapAML_box, keep same output (small trucation error differences).
132    o verification/offline_exf_seaice:
133      - add thermodynamics only test.
134    o verification/cheapAML_box:
135      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
136        keep same output (same 14 digits for cg2d).
137      - switch on "-r8" compiler option (some numerical values are missing
138        the "_d 0") and update output (only 6 digits for cg2d were preserved).
139    
140    checkpoint64b (2012/12/24)
141    o pkg/cheapaml:
142      - remove un-used variables (Qnet,EmPmR) from pickup files.
143      - store tendency of advected variables into cheapaml pickup file
144        and fix the AB-2 restart.
145    o verification/offline_exf_seaice and lab_sea adjoint:
146      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
147      - switch to 4 time steps in offline, consistent with lab_sea.
148      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
149      - update results after change of experiment seaice.
150    o pkg/seaice:
151      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
152        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
153        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
154        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
155    o model/src:
156      - add run-time parameter to select CG2D solver minimum-residual solution
157        (in case of a poor convergence).
158    o pkg/seaice/seaice_lsr.F
159      - move calculation of matrix coefficients into new
160        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
161        file; the main purpose of this change is to be able to reuse the code
162        in S/R SEAICE_PRECONDITIONER
163      - modify the computation of the residual so that the mass of sea-ice
164        is not used twice; this simplifies the calculations, but since
165        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
166        not tested in testreport---this does not affect the testreport results.
167    o verification/seaice_obcs:
168      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
169        verification/lab_sea/input.salt_plume; changes results/output.txt*
170    o model/src:
171      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
172    o pkg/seaice:
173      - improve description of parameters in seaice_fgmres.F and start
174        cleaning up the code
175      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
176        second argument
177      - add a metric based on grid cell area to SEAICE_SCALPROD; update
178        results of offline_exf_seaice.dyn_jfnk
179      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
180    o pkg/aim_v23:
181      - fix an other bug in dissipation heating (grid-cell area was missing).
182    o model/src + pkg/seaice:
183      - add global (multi-tile) linear solver for pair of tri-diagonal system
184        along X and Y lines, respectively for U and V component.
185        Note: 1) MPI and cube-exchange not yet coded.
186            2) probably not accurate for poorly conditioned / large size problem.
187      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
188        default: not compiled and not used.
189    o pkg/seaice:
190      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
191        introduce bi/bj loops and use global_sum_tile_rl instead of
192        mpi_allreduce in seaice_fgmres.F
193      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
194      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
195      - add a verification experiment for JFNK in offline_exf_seaice
196    o verification:
197      - change (for now, only fwd test) offline_exf_seaice experiment:
198        use a re-entrant channel with idealized coastline (trapezoidal shape)
199        at southern boundary to explore seaice dynamics and thermodynamics
200        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
201        secondary test (input.thsice) use thermodynamics only with SST relaxation.
202      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
203    o pkg/exf:
204      - disable "sstExtrapol" when Nr=1
205    o verification:
206      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
207        to test pkg/cheapaml.
208    o pkg/aim_v23 & pkg/shap_filt:
209      - fix dissipation heating (erroneous gravity multiplication factor).
210    o pkg/seaice:
211      - remove unused field pressPre from jfnk solver
212      - rename two subroutines in seaice_preconditioner.F
213    o eesupp/src:
214       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
215    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
216       - remove wrong parts of the rhs and the lhs (were in there
217         because I did not understand the concept of this preconditioner)
218       - add an exchange between u- and v-sweep. This increases communication
219         by a factor of two but improves the convergence of jfnk. Ideally,
220         one would like the u- and v-sweep to be independent. So far within
221         undocumented ifdefs
222       - reorganize the extra computations for printing the residuals
223    o tools/genmake2:
224      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
225        since it's not necessary (and was preventing to use MNC in some cases).
226    
227    checkpoint64a (2012/11/16)
228    o pkg/autodiff:
229      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
230        autodiff_readparms.F no longer depends on calling order (within
231        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
232        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
233        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
234    o pkg/obcs:
235      - adding tidal velocity forcing capability to obcs
236        for usage example, see verification/seaice_obcs/input.tides
237    o pkg/seaice:
238      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
239        SEAICE_LSRrelaxU/V
240      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
241    o pkg/aim_v23:
242      - implement heating from friction (bottom friction and stratospheric drag).
243    o pkg/shap_filt:
244      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
245        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
246    o model/src:
247      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
248        time-constant addMass field from file (addMassFile);
249      - support for heating due to friction (and Kinetic Energy dissipation):
250        add option, run-time switch and 3-D field array + support code ; each pkg
251        or S/R can add heating contribution (if there is a sink of KE); the sum is
252        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
253    o pkg/seaice:
254      - complete merge of ITD code into seaice_growth.F
255        from MITgcm_contrib/torge/itd/code/
256        no verification so far, but Torge Martin tested
257        "1-D test case and Beaufort set up;
258        deliver okay results after 1 model year."
259      - complete merge of SEAICE_SIZE.h into all relevant routines
260      - move computation of eta at Z-points into calc_viscosities
261        + introduce global field etaZ
262        + add different methods for computing etaZ, for now the old
263          method (simple averages of eta to Z-points) is hardwired
264        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
265          seaice_preconditioner
266      - simplify computations for SEAICE_ZETA_SMOOTHREG
267      - seaice_preconditioner:
268        + replace one remaining press by pressLoc (mistake)
269        + adjust printing of residuals
270      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
271        + add (SEAICE.h) and rename some counters (initiliased in
272          seaice_init_fixed.F)
273        + add _BEGIN/END_MASTER (myThid)  around print statements
274        + print total number of iterations and failures over SEAICE_monFreq
275          interval to STDOUT
276      - move control over output-messages by fgmres to seaice_jfnk to save
277        some operations
278      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
279        in order to make restarts with sol .ne. zero (fgmres with restarts)
280        (seaice_jfnk.F, seaice_fgmres.F)
281      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
282        a serious convergence problem when open boundaries are involved
283    o pkg/ggl90: fix computation of control volumes for the case of
284      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
285      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
286    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
287    o pkg/autodiff
288      - Add inAdMode switch for SEAICEuseDYNAMICS:
289        SEAICEuseDYNAMICSinAdMode
290        (extend logic in ADAUTODIFF_INADMODE_SET)
291    o pkg/seaice
292      - Step 1 of merging ice-thickness distribution (ITD) code from
293        MITgcm_contrib/torge/itd/ (author: Torge Martin)
294        The code implements concept laid out in Thorndike et al. (1975);
295        code is enabled via CPP flag SEAICE_ITD
296        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
297        code is not complete yet!!
298      - SEAICE_SIZE.h now included in almost all seaice routines
299    o verification (using seaice):
300      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
301        global_ocean.cs32x15.seaice ; update results.
302      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
303      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
304        offline_exf_seaice (previously compiling B-grid).
305    o pkg/exf:
306      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
307        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
308        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
309  o pkg/layers (adjust changes from Sept 19):  o pkg/layers (adjust changes from Sept 19):
310    - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)    - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
311      this allows to remove "layers_maxNum" dimension from all layers arrays.      this allows to remove "layers_maxNum" dimension from all layers arrays.
# Line 20  o pkg/seaice: Line 322  o pkg/seaice:
322    - remove global fields DRAGA and DRAGS from C-grid code and    - remove global fields DRAGA and DRAGS from C-grid code and
323      declare them locally in lsr.F (the only place where they are      declare them locally in lsr.F (the only place where they are
324      still used)      still used)
325      - update AD output of lab_sea.evp (very sensitive anyway).
326  o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics  o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
327    (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK    (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
328    and SEAICEuseJFNK=.true. A few things to note:    and SEAICEuseJFNK=.true. A few things to note:

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