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revision 1.1743 by mlosch, Mon Sep 24 15:07:38 2012 UTC revision 1.1805 by jmc, Fri Jan 11 00:13:43 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/exf & thsice:
8      - for diagnostics purpose, fill-up and update Qsw array (+ fill the diagnostics)
9        even when SHORTWAVE_HEATING is #undef;
10    o verification/cfc_example:
11      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to illustrate
12        how to use it).
13    o verification/offline_exf_seaice:
14      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
15        files to only one time-record.
16      in input.thermo: narrow the 2 bands of low initial ice-concentration near
17        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
18        snapshot output; same mcPheePiston value as in thsice with surf-current=0.2m/s.
19      in input.thsice: similar set-up as in input.thermo (channel with same seaice
20        initial conditions).
21    o verification/cfc_example:
22      - update file "data" with more standard choice (default rotationPeriod,
23        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
24        set deltaTFreeSurf to deltaTtracer) and update the output.
25    o pkg/layers:
26      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
27      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
28    o verification/offline_exf_seaice:
29      - set all {field}period to zero for constant-in-time forcing (not tested
30        anywhere else).
31    o verification/offline_exf_seaice:
32      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
33      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
34    o model/src:
35      - implement Finite-Volume method for (hydrostatic) presure gradient
36        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
37    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
38      - In order to be compatible with the default EVP code, this requires changing
39        the EVP code around a little; and because any small change immediately
40        breaks the lab_sea.hb87 verification experiment, the reference output is
41        updated two times (each time the remaining aggrement was only 2 digits):
42        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
43        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
44        The adjoint test lab_sea.evp also needed to be updated.
45      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
46        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
47        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
48        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
49        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
50        kept obscure, because I need to test it a little more.
51    o pkg/cheapaml:
52      - fix few incorrect type (_RL/_RS) in subroutine calls.
53    o pkg/seaice:
54      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
55        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
56    o model/src:
57      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
58        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
59        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
60    o pkg/cheapaml:
61      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
62        update output of experiment cheapAML_box.
63      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
64        and set them only in one place (cheapaml_readparms.F).
65      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
66      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
67        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
68    o model/src/the_main_loop.F:
69      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
70    o pkg/seaice:
71      - remove legacy branch code.
72      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
73    o verification/*/code*/SEAICE_OPTIONS.h:
74      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
75        SEAICE_CAP_HEFF).
76    o pkg/cheapaml:
77      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
78        to load new forcing fields.
79      - add missing "_d 0" where it's needed; + some editing (improve indentation).
80      - remove switch to "-r8" compiler option (no longer needed) in verification
81        cheapAML_box, keep same output (small trucation error differences).
82    o verification/offline_exf_seaice:
83      - add thermodynamics only test.
84    o verification/cheapAML_box:
85      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
86        keep same output (same 14 digits for cg2d).
87      - switch on "-r8" compiler option (some numerical values are missing
88        the "_d 0") and update output (only 6 digits for cg2d were preserved).
89    
90    checkpoint64b (2012/12/24)
91    o pkg/cheapaml:
92      - remove un-used variables (Qnet,EmPmR) from pickup files.
93      - store tendency of advected variables into cheapaml pickup file
94        and fix the AB-2 restart.
95    o verification/offline_exf_seaice and lab_sea adjoint:
96      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
97      - switch to 4 time steps in offline, consistent with lab_sea.
98      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
99      - update results after change of experiment seaice.
100    o pkg/seaice:
101      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
102        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
103        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
104        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
105    o model/src:
106      - add run-time parameter to select CG2D solver minimum-residual solution
107        (in case of a poor convergence).
108    o pkg/seaice/seaice_lsr.F
109      - move calculation of matrix coefficients into new
110        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
111        file; the main purpose of this change is to be able to reuse the code
112        in S/R SEAICE_PRECONDITIONER
113      - modify the computation of the residual so that the mass of sea-ice
114        is not used twice; this simplifies the calculations, but since
115        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
116        not tested in testreport---this does not affect the testreport results.
117    o verification/seaice_obcs:
118      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
119        verification/lab_sea/input.salt_plume; changes results/output.txt*
120    o model/src:
121      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
122    o pkg/seaice:
123      - improve description of parameters in seaice_fgmres.F and start
124        cleaning up the code
125      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
126        second argument
127      - add a metric based on grid cell area to SEAICE_SCALPROD; update
128        results of offline_exf_seaice.dyn_jfnk
129      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
130    o pkg/aim_v23:
131      - fix an other bug in dissipation heating (grid-cell area was missing).
132    o model/src + pkg/seaice:
133      - add global (multi-tile) linear solver for pair of tri-diagonal system
134        along X and Y lines, respectively for U and V component.
135        Note: 1) MPI and cube-exchange not yet coded.
136            2) probably not accurate for poorly conditioned / large size problem.
137      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
138        default: not compiled and not used.
139    o pkg/seaice:
140      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
141        introduce bi/bj loops and use global_sum_tile_rl instead of
142        mpi_allreduce in seaice_fgmres.F
143      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
144      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
145      - add a verification experiment for JFNK in offline_exf_seaice
146    o verification:
147      - change (for now, only fwd test) offline_exf_seaice experiment:
148        use a re-entrant channel with idealized coastline (trapezoidal shape)
149        at southern boundary to explore seaice dynamics and thermodynamics
150        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
151        secondary test (input.thsice) use thermodynamics only with SST relaxation.
152      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
153    o pkg/exf:
154      - disable "sstExtrapol" when Nr=1
155    o verification:
156      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
157        to test pkg/cheapaml.
158    o pkg/aim_v23 & pkg/shap_filt:
159      - fix dissipation heating (erroneous gravity multiplication factor).
160    o pkg/seaice:
161      - remove unused field pressPre from jfnk solver
162      - rename two subroutines in seaice_preconditioner.F
163    o eesupp/src:
164       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
165    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
166       - remove wrong parts of the rhs and the lhs (were in there
167         because I did not understand the concept of this preconditioner)
168       - add an exchange between u- and v-sweep. This increases communication
169         by a factor of two but improves the convergence of jfnk. Ideally,
170         one would like the u- and v-sweep to be independent. So far within
171         undocumented ifdefs
172       - reorganize the extra computations for printing the residuals
173    o tools/genmake2:
174      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
175        since it's not necessary (and was preventing to use MNC in some cases).
176    
177    checkpoint64a (2012/11/16)
178    o pkg/autodiff:
179      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
180        autodiff_readparms.F no longer depends on calling order (within
181        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
182        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
183        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
184    o pkg/obcs:
185      - adding tidal velocity forcing capability to obcs
186        for usage example, see verification/seaice_obcs/input.tides
187    o pkg/seaice:
188      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
189        SEAICE_LSRrelaxU/V
190      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
191    o pkg/aim_v23:
192      - implement heating from friction (bottom friction and stratospheric drag).
193    o pkg/shap_filt:
194      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
195        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
196    o model/src:
197      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
198        time-constant addMass field from file (addMassFile);
199      - support for heating due to friction (and Kinetic Energy dissipation):
200        add option, run-time switch and 3-D field array + support code ; each pkg
201        or S/R can add heating contribution (if there is a sink of KE); the sum is
202        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
203    o pkg/seaice:
204      - complete merge of ITD code into seaice_growth.F
205        from MITgcm_contrib/torge/itd/code/
206        no verification so far, but Torge Martin tested
207        "1-D test case and Beaufort set up;
208        deliver okay results after 1 model year."
209      - complete merge of SEAICE_SIZE.h into all relevant routines
210      - move computation of eta at Z-points into calc_viscosities
211        + introduce global field etaZ
212        + add different methods for computing etaZ, for now the old
213          method (simple averages of eta to Z-points) is hardwired
214        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
215          seaice_preconditioner
216      - simplify computations for SEAICE_ZETA_SMOOTHREG
217      - seaice_preconditioner:
218        + replace one remaining press by pressLoc (mistake)
219        + adjust printing of residuals
220      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
221        + add (SEAICE.h) and rename some counters (initiliased in
222          seaice_init_fixed.F)
223        + add _BEGIN/END_MASTER (myThid)  around print statements
224        + print total number of iterations and failures over SEAICE_monFreq
225          interval to STDOUT
226      - move control over output-messages by fgmres to seaice_jfnk to save
227        some operations
228      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
229        in order to make restarts with sol .ne. zero (fgmres with restarts)
230        (seaice_jfnk.F, seaice_fgmres.F)
231      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
232        a serious convergence problem when open boundaries are involved
233    o pkg/ggl90: fix computation of control volumes for the case of
234      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
235      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
236    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
237    o pkg/autodiff
238      - Add inAdMode switch for SEAICEuseDYNAMICS:
239        SEAICEuseDYNAMICSinAdMode
240        (extend logic in ADAUTODIFF_INADMODE_SET)
241    o pkg/seaice
242      - Step 1 of merging ice-thickness distribution (ITD) code from
243        MITgcm_contrib/torge/itd/ (author: Torge Martin)
244        The code implements concept laid out in Thorndike et al. (1975);
245        code is enabled via CPP flag SEAICE_ITD
246        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
247        code is not complete yet!!
248      - SEAICE_SIZE.h now included in almost all seaice routines
249    o verification (using seaice):
250      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
251        global_ocean.cs32x15.seaice ; update results.
252      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
253      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
254        offline_exf_seaice (previously compiling B-grid).
255    o pkg/exf:
256      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
257        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
258        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
259    o pkg/layers (adjust changes from Sept 19):
260      - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
261        this allows to remove "layers_maxNum" dimension from all layers arrays.
262    o pkg/layers (adjust changes from Sept 19):
263      - remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ;
264      - snap-shot extended to all type of layers (not just the 1rst type);
265      - remove layers variables when corresponding CPP option is undef.
266    o pkg/layers:
267      - rename pkg/layers variable and add new output (layer exist & un-weighted
268        velocity in layer)
269    o pkg/seaice:
270      - simplify (?) ocean-drag coefficent computations by using
271        the same routine in all three solvers (saves some code lines)
272      - remove global fields DRAGA and DRAGS from C-grid code and
273        declare them locally in lsr.F (the only place where they are
274        still used)
275      - update AD output of lab_sea.evp (very sensitive anyway).
276    o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
277      (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
278      and SEAICEuseJFNK=.true. A few things to note:
279      - involves a FGMRES, that is parallel but very inefficient,
280        because of many scalar products (global sums) in the Gram-Schmidt
281        orthogonalization method. Needs to be replaced. Original code
282        from J.-F. Lemieux
283      - preconditioner for FGMRES is a stripped down version of LSOR
284      - SOLV_MAX_ITERS is now used for LSOR as a solver and as a
285        preconditioner. For the preconditioner, the default is set to 10.
286      - Jacobian times vector is computed with finite differences
287      - marginally related to JFNK-solver: add a smooth regularization for
288        zeta with tanh that will improve convergence (Lemieux and Tremblay,
289        2009) for any implicit solver (not implemented for EVP because EVP
290        does not need this regularization in the first place). Define
291        SEAICE_ZETA_SMOOTHREG in SEAICE_OPTIONS.h to use.
292    o eesupp/src:
293      - check in genmake2 that intrinsic S/R flush is available.
294      - add S/R to flush IO unit (if intrinsic S/R flush is available)
295      - flush standard & error msg unit before MPI termination
296      - if debugMode, flush IO unit after printing msg
297    o pkg/ctrl:
298      - ctrl_unpack.F, ALLOW_GENARR3D_CONTROL code: fix missing argument in call
299        to ctrl_set_unpack_xyz.
300    
301    checkpoint64 (2012/10/09)
302    o pkg/shelfice
303      - in mom_fluxform.F, mom_vecinv.F:
304        CALL SHELFICE_V_DRAG(bi,bj,k,vFld,KE,KappaRU,vF,myThid)
305        Bug fix KappaRU -> KappaRV
306        does not change verification/isomip but may change other setups
307        (presumably constant KappaRU=KappaRV)
308      - fix diagnostics SHIU/Vdrag (thanks to Tom Millgate)
309    o pkg/obcs:
310      - fixed some indexing bugs in obcs_seaice_sponge.F
311      - added obcs relaxation subroutines for HSALT and HSNOW
312      - changes verification/seaice_obcs/results/obcs_seaice_sponge.F
313  o pkg/seaice:  o pkg/seaice:
314    - add "multicategory" parameterization for snow in analogy to ice,    - add "multicategory" parameterization for snow in analogy to ice,
315      default is off for now.      default is off for now.

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