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revision 1.1760 by mlosch, Tue Nov 6 12:31:30 2012 UTC revision 1.1816 by jmc, Sun Feb 3 04:59:59 2013 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7  o pkg/seaice/seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes  o model/src:
8    a serious convergence problem when open boundaries are involved    - account for moist thermodynamics in (dry) potential temperature equation;
9  o pkg/ggl90: fix computation of control volumes for the case of      update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
10        and cpl_aim+ocn.
11    o pkg/ctrl:
12      - 1st step toward generic time-varying control variable (2D) via CPP option
13        ALLOW_GENTIM2D_CONTROL
14      - note new namelist ctrl_nml_genarr in data.ctrl
15    o verification/global_ocean.cs32x15:
16      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
17        thsice calling sequence and update "output.icedyn.txt" output file.
18    o pkg/ptracers:
19      - from Ryan A.: code to allow to restart a tracer at regular time interval
20        specifying a reset frequency and a reset-phase (for each tracers).
21    o pkg/thsice:
22      - implement new sequence of calls for thsice+seaice:
23          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
24          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
25      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
26        in CPP_OPTIONS.h) to recover old sequence;
27      - update diagnostics for Intermediate State thsice diagnostics: now filled
28        just before advection (instead of just after advection in old sequence);
29      - update output of experiment offline_exf_seaice (standard test);
30      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
31        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
32    o pkg/aim_v23:
33      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
34      - use standard pkg/mdsio routines to read & write CO2 pickup file;
35      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
36      - Implement new sequence of calls for seaice advection (with thsice and
37        seaice diffusion): do ice advection after ice-Thermodynamic (previously
38        was done before); change aim_do_physics.F (split the bi,bj loops block);
39      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
40    o pkg/thsice:
41      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
42        where just seaice diffusion is used without seaice-dynamics.
43    
44    checkpoint64c (2013/01/18)
45    o pkg/seaice:
46      - add a parameter JFNKres_tFac that can replace JFNKres_t
47        (= JFNKres_tFac*JFNKresidual before JFNK solver)
48      - add a line search option to the JFNK solver
49      - move update of u/vIce and computation of initial residual into a separate
50        routine (same file); makes the code a little easier to read (?)
51      - the line search requires computation of the residual and for some reason
52        I cannot do the update of u/vIce at the beginning of the Newton loop
53        without changing the results, so we move computation of the new residual
54        also to the end of the Newton loop, even without the line search
55    o pkg/mdsio:
56      - write missing value (corresponding to undefined array value) to meta files;
57        skip this if missing value is one (UNSET_RL would be a better value for the
58        case of undefined missing value but it's current the default missing-value);
59        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
60    o pkg/exf & thsice:
61      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
62        diagnostics) even when SHORTWAVE_HEATING is #undef;
63    o verification/cfc_example:
64      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
65        illustrate how to use it).
66    o verification/offline_exf_seaice:
67      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
68        files to only one time-record.
69      in input.thermo: narrow the 2 bands of low initial ice-concentration near
70        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
71        snapshot output; same mcPheePiston value as in thsice with
72        surf-current=0.2m/s.
73      in input.thsice: similar set-up as in input.thermo (channel with same seaice
74        initial conditions).
75    o verification/cfc_example:
76      - update file "data" with more standard choice (default rotationPeriod,
77        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
78        set deltaTFreeSurf to deltaTtracer) and update the output.
79    o pkg/layers:
80      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
81      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
82    o verification/offline_exf_seaice:
83      - set all {field}period to zero for constant-in-time forcing (not tested
84        anywhere else).
85    o verification/offline_exf_seaice:
86      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
87      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
88    o model/src:
89      - implement Finite-Volume method for (hydrostatic) presure gradient
90        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
91    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
92      - In order to be compatible with the default EVP code, this requires changing
93        the EVP code around a little; and because any small change immediately
94        breaks the lab_sea.hb87 verification experiment, the reference output is
95        updated two times (each time the remaining aggrement was only 2 digits):
96        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
97        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
98        The adjoint test lab_sea.evp also needed to be updated.
99      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
100        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
101        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
102        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
103        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
104        kept obscure, because I need to test it a little more.
105    o pkg/cheapaml:
106      - fix few incorrect type (_RL/_RS) in subroutine calls.
107    o pkg/seaice:
108      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
109        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
110    o model/src:
111      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
112        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
113        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
114    o pkg/cheapaml:
115      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
116        update output of experiment cheapAML_box.
117      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
118        and set them only in one place (cheapaml_readparms.F).
119      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
120      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
121        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
122    o model/src/the_main_loop.F:
123      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
124    o pkg/seaice:
125      - remove legacy branch code.
126      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
127    o verification/*/code*/SEAICE_OPTIONS.h:
128      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
129        SEAICE_CAP_HEFF).
130    o pkg/cheapaml:
131      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
132        to load new forcing fields.
133      - add missing "_d 0" where it's needed; + some editing (improve indentation).
134      - remove switch to "-r8" compiler option (no longer needed) in verification
135        cheapAML_box, keep same output (small trucation error differences).
136    o verification/offline_exf_seaice:
137      - add thermodynamics only test.
138    o verification/cheapAML_box:
139      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
140        keep same output (same 14 digits for cg2d).
141      - switch on "-r8" compiler option (some numerical values are missing
142        the "_d 0") and update output (only 6 digits for cg2d were preserved).
143    
144    checkpoint64b (2012/12/24)
145    o pkg/cheapaml:
146      - remove un-used variables (Qnet,EmPmR) from pickup files.
147      - store tendency of advected variables into cheapaml pickup file
148        and fix the AB-2 restart.
149    o verification/offline_exf_seaice and lab_sea adjoint:
150      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
151      - switch to 4 time steps in offline, consistent with lab_sea.
152      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
153      - update results after change of experiment seaice.
154    o pkg/seaice:
155      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
156        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
157        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
158        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
159    o model/src:
160      - add run-time parameter to select CG2D solver minimum-residual solution
161        (in case of a poor convergence).
162    o pkg/seaice/seaice_lsr.F
163      - move calculation of matrix coefficients into new
164        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
165        file; the main purpose of this change is to be able to reuse the code
166        in S/R SEAICE_PRECONDITIONER
167      - modify the computation of the residual so that the mass of sea-ice
168        is not used twice; this simplifies the calculations, but since
169        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
170        not tested in testreport---this does not affect the testreport results.
171    o verification/seaice_obcs:
172      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
173        verification/lab_sea/input.salt_plume; changes results/output.txt*
174    o model/src:
175      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
176    o pkg/seaice:
177      - improve description of parameters in seaice_fgmres.F and start
178        cleaning up the code
179      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
180        second argument
181      - add a metric based on grid cell area to SEAICE_SCALPROD; update
182        results of offline_exf_seaice.dyn_jfnk
183      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
184    o pkg/aim_v23:
185      - fix an other bug in dissipation heating (grid-cell area was missing).
186    o model/src + pkg/seaice:
187      - add global (multi-tile) linear solver for pair of tri-diagonal system
188        along X and Y lines, respectively for U and V component.
189        Note: 1) MPI and cube-exchange not yet coded.
190            2) probably not accurate for poorly conditioned / large size problem.
191      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
192        default: not compiled and not used.
193    o pkg/seaice:
194      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
195        introduce bi/bj loops and use global_sum_tile_rl instead of
196        mpi_allreduce in seaice_fgmres.F
197      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
198      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
199      - add a verification experiment for JFNK in offline_exf_seaice
200    o verification:
201      - change (for now, only fwd test) offline_exf_seaice experiment:
202        use a re-entrant channel with idealized coastline (trapezoidal shape)
203        at southern boundary to explore seaice dynamics and thermodynamics
204        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
205        secondary test (input.thsice) use thermodynamics only with SST relaxation.
206      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
207    o pkg/exf:
208      - disable "sstExtrapol" when Nr=1
209    o verification:
210      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
211        to test pkg/cheapaml.
212    o pkg/aim_v23 & pkg/shap_filt:
213      - fix dissipation heating (erroneous gravity multiplication factor).
214    o pkg/seaice:
215      - remove unused field pressPre from jfnk solver
216      - rename two subroutines in seaice_preconditioner.F
217    o eesupp/src:
218       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
219    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
220       - remove wrong parts of the rhs and the lhs (were in there
221         because I did not understand the concept of this preconditioner)
222       - add an exchange between u- and v-sweep. This increases communication
223         by a factor of two but improves the convergence of jfnk. Ideally,
224         one would like the u- and v-sweep to be independent. So far within
225         undocumented ifdefs
226       - reorganize the extra computations for printing the residuals
227    o tools/genmake2:
228      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
229        since it's not necessary (and was preventing to use MNC in some cases).
230    
231    checkpoint64a (2012/11/16)
232    o pkg/autodiff:
233      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
234        autodiff_readparms.F no longer depends on calling order (within
235        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
236        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
237        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
238    o pkg/obcs:
239      - adding tidal velocity forcing capability to obcs
240        for usage example, see verification/seaice_obcs/input.tides
241    o pkg/seaice:
242      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
243        SEAICE_LSRrelaxU/V
244      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
245    o pkg/aim_v23:
246      - implement heating from friction (bottom friction and stratospheric drag).
247    o pkg/shap_filt:
248      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
249        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
250    o model/src:
251      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
252        time-constant addMass field from file (addMassFile);
253      - support for heating due to friction (and Kinetic Energy dissipation):
254        add option, run-time switch and 3-D field array + support code ; each pkg
255        or S/R can add heating contribution (if there is a sink of KE); the sum is
256        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
257    o pkg/seaice:
258      - complete merge of ITD code into seaice_growth.F
259        from MITgcm_contrib/torge/itd/code/
260        no verification so far, but Torge Martin tested
261        "1-D test case and Beaufort set up;
262        deliver okay results after 1 model year."
263      - complete merge of SEAICE_SIZE.h into all relevant routines
264      - move computation of eta at Z-points into calc_viscosities
265        + introduce global field etaZ
266        + add different methods for computing etaZ, for now the old
267          method (simple averages of eta to Z-points) is hardwired
268        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
269          seaice_preconditioner
270      - simplify computations for SEAICE_ZETA_SMOOTHREG
271      - seaice_preconditioner:
272        + replace one remaining press by pressLoc (mistake)
273        + adjust printing of residuals
274      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
275        + add (SEAICE.h) and rename some counters (initiliased in
276          seaice_init_fixed.F)
277        + add _BEGIN/END_MASTER (myThid)  around print statements
278        + print total number of iterations and failures over SEAICE_monFreq
279          interval to STDOUT
280      - move control over output-messages by fgmres to seaice_jfnk to save
281        some operations
282      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
283        in order to make restarts with sol .ne. zero (fgmres with restarts)
284        (seaice_jfnk.F, seaice_fgmres.F)
285      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
286        a serious convergence problem when open boundaries are involved
287    o pkg/ggl90: fix computation of control volumes for the case of
288    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes    ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
289    up half a grid cell from C-centered to W-centered (pointed out by C. Eden)    up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
290  o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC  o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
291  o pkg/autodiff  o pkg/autodiff
292    - Add inAdMode switch for SEAICEuseDYNAMICS:    - Add inAdMode switch for SEAICEuseDYNAMICS:
293      SEAICEuseDYNAMICSinAdMode      SEAICEuseDYNAMICSinAdMode
294      (extend logic in ADAUTODIFF_INADMODE_SET)      (extend logic in ADAUTODIFF_INADMODE_SET)
295  o pkg/seaice  o pkg/seaice
296    - Step 1 of merging ice-thickness distribution (ITD) code from    - Step 1 of merging ice-thickness distribution (ITD) code from

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