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revision 1.1746 by mlosch, Fri Oct 5 15:19:00 2012 UTC revision 1.1821 by mlosch, Fri Feb 8 07:56:45 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/diagnostics:
8      - change default missing_value from UNSET_RL to -999.
9    o pkg/layers: improve vectorization of layers_fluxcalc.F
10      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
11        time spent in this routine by more than a factor of 3 on an NEC-SX8
12      - step 2: replace search algorithm by a bisection algorithm found in
13        Press et al. Numerical Recipes in Fortran. This algorithm can be
14        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
15        For now, use this algorithm only for TARGET_NEC_SX defined.
16      - moved the search algorithm into a separate subroutine, that is kept
17        within the same file for automatic inlining.
18      - modified catching potential errors
19    o pkg/ecco:
20      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
21    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
22      - modifications for ALLOW_GENTIM2D_CONTROL
23      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
24      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
25      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
26      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
27    o model/src:
28      - account for moist thermodynamics in (dry) potential temperature equation;
29        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
30        and cpl_aim+ocn.
31      - also switch to standard compiler (gfortran, was using ifort previously)
32        for fizhi-cs experiments reference output.
33    o pkg/ctrl:
34      - 1st step toward generic time-varying control variable (2D) via CPP option
35        ALLOW_GENTIM2D_CONTROL
36      - note new namelist ctrl_nml_genarr in data.ctrl
37    o verification/global_ocean.cs32x15:
38      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
39        thsice calling sequence and update "output.icedyn.txt" output file.
40    o pkg/ptracers:
41      - from Ryan A.: code to allow to restart a tracer at regular time interval
42        specifying a reset frequency and a reset-phase (for each tracers).
43    o pkg/thsice:
44      - implement new sequence of calls for thsice+seaice:
45          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
46          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
47      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
48        in CPP_OPTIONS.h) to recover old sequence;
49      - update diagnostics for Intermediate State thsice diagnostics: now filled
50        just before advection (instead of just after advection in old sequence);
51      - update output of experiment offline_exf_seaice (standard test);
52      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
53        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
54    o pkg/aim_v23:
55      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
56      - use standard pkg/mdsio routines to read & write CO2 pickup file;
57      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
58      - Implement new sequence of calls for seaice advection (with thsice and
59        seaice diffusion): do ice advection after ice-Thermodynamic (previously
60        was done before); change aim_do_physics.F (split the bi,bj loops block);
61      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
62    o pkg/thsice:
63      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
64        where just seaice diffusion is used without seaice-dynamics.
65    
66    checkpoint64c (2013/01/18)
67    o pkg/seaice:
68      - add a parameter JFNKres_tFac that can replace JFNKres_t
69        (= JFNKres_tFac*JFNKresidual before JFNK solver)
70      - add a line search option to the JFNK solver
71      - move update of u/vIce and computation of initial residual into a separate
72        routine (same file); makes the code a little easier to read (?)
73      - the line search requires computation of the residual and for some reason
74        I cannot do the update of u/vIce at the beginning of the Newton loop
75        without changing the results, so we move computation of the new residual
76        also to the end of the Newton loop, even without the line search
77    o pkg/mdsio:
78      - write missing value (corresponding to undefined array value) to meta files;
79        skip this if missing value is one (UNSET_RL would be a better value for the
80        case of undefined missing value but it's current the default missing-value);
81        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
82    o pkg/exf & thsice:
83      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
84        diagnostics) even when SHORTWAVE_HEATING is #undef;
85    o verification/cfc_example:
86      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
87        illustrate how to use it).
88    o verification/offline_exf_seaice:
89      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
90        files to only one time-record.
91      in input.thermo: narrow the 2 bands of low initial ice-concentration near
92        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
93        snapshot output; same mcPheePiston value as in thsice with
94        surf-current=0.2m/s.
95      in input.thsice: similar set-up as in input.thermo (channel with same seaice
96        initial conditions).
97    o verification/cfc_example:
98      - update file "data" with more standard choice (default rotationPeriod,
99        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
100        set deltaTFreeSurf to deltaTtracer) and update the output.
101    o pkg/layers:
102      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
103      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
104    o verification/offline_exf_seaice:
105      - set all {field}period to zero for constant-in-time forcing (not tested
106        anywhere else).
107    o verification/offline_exf_seaice:
108      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
109      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
110    o model/src:
111      - implement Finite-Volume method for (hydrostatic) presure gradient
112        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
113    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
114      - In order to be compatible with the default EVP code, this requires changing
115        the EVP code around a little; and because any small change immediately
116        breaks the lab_sea.hb87 verification experiment, the reference output is
117        updated two times (each time the remaining aggrement was only 2 digits):
118        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
119        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
120        The adjoint test lab_sea.evp also needed to be updated.
121      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
122        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
123        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
124        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
125        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
126        kept obscure, because I need to test it a little more.
127    o pkg/cheapaml:
128      - fix few incorrect type (_RL/_RS) in subroutine calls.
129    o pkg/seaice:
130      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
131        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
132    o model/src:
133      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
134        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
135        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
136    o pkg/cheapaml:
137      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
138        update output of experiment cheapAML_box.
139      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
140        and set them only in one place (cheapaml_readparms.F).
141      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
142      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
143        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
144    o model/src/the_main_loop.F:
145      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
146    o pkg/seaice:
147      - remove legacy branch code.
148      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
149    o verification/*/code*/SEAICE_OPTIONS.h:
150      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
151        SEAICE_CAP_HEFF).
152    o pkg/cheapaml:
153      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
154        to load new forcing fields.
155      - add missing "_d 0" where it's needed; + some editing (improve indentation).
156      - remove switch to "-r8" compiler option (no longer needed) in verification
157        cheapAML_box, keep same output (small trucation error differences).
158    o verification/offline_exf_seaice:
159      - add thermodynamics only test.
160    o verification/cheapAML_box:
161      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
162        keep same output (same 14 digits for cg2d).
163      - switch on "-r8" compiler option (some numerical values are missing
164        the "_d 0") and update output (only 6 digits for cg2d were preserved).
165    
166    checkpoint64b (2012/12/24)
167    o pkg/cheapaml:
168      - remove un-used variables (Qnet,EmPmR) from pickup files.
169      - store tendency of advected variables into cheapaml pickup file
170        and fix the AB-2 restart.
171    o verification/offline_exf_seaice and lab_sea adjoint:
172      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
173      - switch to 4 time steps in offline, consistent with lab_sea.
174      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
175      - update results after change of experiment seaice.
176    o pkg/seaice:
177      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
178        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
179        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
180        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
181    o model/src:
182      - add run-time parameter to select CG2D solver minimum-residual solution
183        (in case of a poor convergence).
184    o pkg/seaice/seaice_lsr.F
185      - move calculation of matrix coefficients into new
186        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
187        file; the main purpose of this change is to be able to reuse the code
188        in S/R SEAICE_PRECONDITIONER
189      - modify the computation of the residual so that the mass of sea-ice
190        is not used twice; this simplifies the calculations, but since
191        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
192        not tested in testreport---this does not affect the testreport results.
193    o verification/seaice_obcs:
194      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
195        verification/lab_sea/input.salt_plume; changes results/output.txt*
196    o model/src:
197      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
198    o pkg/seaice:
199      - improve description of parameters in seaice_fgmres.F and start
200        cleaning up the code
201      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
202        second argument
203      - add a metric based on grid cell area to SEAICE_SCALPROD; update
204        results of offline_exf_seaice.dyn_jfnk
205      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
206    o pkg/aim_v23:
207      - fix an other bug in dissipation heating (grid-cell area was missing).
208    o model/src + pkg/seaice:
209      - add global (multi-tile) linear solver for pair of tri-diagonal system
210        along X and Y lines, respectively for U and V component.
211        Note: 1) MPI and cube-exchange not yet coded.
212            2) probably not accurate for poorly conditioned / large size problem.
213      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
214        default: not compiled and not used.
215    o pkg/seaice:
216      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
217        introduce bi/bj loops and use global_sum_tile_rl instead of
218        mpi_allreduce in seaice_fgmres.F
219      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
220      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
221      - add a verification experiment for JFNK in offline_exf_seaice
222    o verification:
223      - change (for now, only fwd test) offline_exf_seaice experiment:
224        use a re-entrant channel with idealized coastline (trapezoidal shape)
225        at southern boundary to explore seaice dynamics and thermodynamics
226        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
227        secondary test (input.thsice) use thermodynamics only with SST relaxation.
228      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
229    o pkg/exf:
230      - disable "sstExtrapol" when Nr=1
231    o verification:
232      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
233        to test pkg/cheapaml.
234    o pkg/aim_v23 & pkg/shap_filt:
235      - fix dissipation heating (erroneous gravity multiplication factor).
236    o pkg/seaice:
237      - remove unused field pressPre from jfnk solver
238      - rename two subroutines in seaice_preconditioner.F
239    o eesupp/src:
240       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
241    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
242       - remove wrong parts of the rhs and the lhs (were in there
243         because I did not understand the concept of this preconditioner)
244       - add an exchange between u- and v-sweep. This increases communication
245         by a factor of two but improves the convergence of jfnk. Ideally,
246         one would like the u- and v-sweep to be independent. So far within
247         undocumented ifdefs
248       - reorganize the extra computations for printing the residuals
249    o tools/genmake2:
250      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
251        since it's not necessary (and was preventing to use MNC in some cases).
252    
253    checkpoint64a (2012/11/16)
254    o pkg/autodiff:
255      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
256        autodiff_readparms.F no longer depends on calling order (within
257        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
258        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
259        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
260    o pkg/obcs:
261      - adding tidal velocity forcing capability to obcs
262        for usage example, see verification/seaice_obcs/input.tides
263    o pkg/seaice:
264      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
265        SEAICE_LSRrelaxU/V
266      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
267    o pkg/aim_v23:
268      - implement heating from friction (bottom friction and stratospheric drag).
269    o pkg/shap_filt:
270      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
271        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
272    o model/src:
273      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
274        time-constant addMass field from file (addMassFile);
275      - support for heating due to friction (and Kinetic Energy dissipation):
276        add option, run-time switch and 3-D field array + support code ; each pkg
277        or S/R can add heating contribution (if there is a sink of KE); the sum is
278        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
279    o pkg/seaice:
280      - complete merge of ITD code into seaice_growth.F
281        from MITgcm_contrib/torge/itd/code/
282        no verification so far, but Torge Martin tested
283        "1-D test case and Beaufort set up;
284        deliver okay results after 1 model year."
285      - complete merge of SEAICE_SIZE.h into all relevant routines
286      - move computation of eta at Z-points into calc_viscosities
287        + introduce global field etaZ
288        + add different methods for computing etaZ, for now the old
289          method (simple averages of eta to Z-points) is hardwired
290        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
291          seaice_preconditioner
292      - simplify computations for SEAICE_ZETA_SMOOTHREG
293      - seaice_preconditioner:
294        + replace one remaining press by pressLoc (mistake)
295        + adjust printing of residuals
296      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
297        + add (SEAICE.h) and rename some counters (initiliased in
298          seaice_init_fixed.F)
299        + add _BEGIN/END_MASTER (myThid)  around print statements
300        + print total number of iterations and failures over SEAICE_monFreq
301          interval to STDOUT
302      - move control over output-messages by fgmres to seaice_jfnk to save
303        some operations
304      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
305        in order to make restarts with sol .ne. zero (fgmres with restarts)
306        (seaice_jfnk.F, seaice_fgmres.F)
307      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
308        a serious convergence problem when open boundaries are involved
309    o pkg/ggl90: fix computation of control volumes for the case of
310      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
311      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
312    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
313    o pkg/autodiff
314      - Add inAdMode switch for SEAICEuseDYNAMICS:
315        SEAICEuseDYNAMICSinAdMode
316        (extend logic in ADAUTODIFF_INADMODE_SET)
317    o pkg/seaice
318      - Step 1 of merging ice-thickness distribution (ITD) code from
319        MITgcm_contrib/torge/itd/ (author: Torge Martin)
320        The code implements concept laid out in Thorndike et al. (1975);
321        code is enabled via CPP flag SEAICE_ITD
322        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
323        code is not complete yet!!
324      - SEAICE_SIZE.h now included in almost all seaice routines
325    o verification (using seaice):
326      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
327        global_ocean.cs32x15.seaice ; update results.
328      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
329      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
330        offline_exf_seaice (previously compiling B-grid).
331    o pkg/exf:
332      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
333        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
334        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
335    o pkg/layers (adjust changes from Sept 19):
336      - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
337        this allows to remove "layers_maxNum" dimension from all layers arrays.
338    o pkg/layers (adjust changes from Sept 19):
339      - remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ;
340      - snap-shot extended to all type of layers (not just the 1rst type);
341      - remove layers variables when corresponding CPP option is undef.
342    o pkg/layers:
343      - rename pkg/layers variable and add new output (layer exist & un-weighted
344        velocity in layer)
345    o pkg/seaice:
346      - simplify (?) ocean-drag coefficent computations by using
347        the same routine in all three solvers (saves some code lines)
348      - remove global fields DRAGA and DRAGS from C-grid code and
349        declare them locally in lsr.F (the only place where they are
350        still used)
351      - update AD output of lab_sea.evp (very sensitive anyway).
352    o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
353      (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
354      and SEAICEuseJFNK=.true. A few things to note:
355      - involves a FGMRES, that is parallel but very inefficient,
356        because of many scalar products (global sums) in the Gram-Schmidt
357        orthogonalization method. Needs to be replaced. Original code
358        from J.-F. Lemieux
359      - preconditioner for FGMRES is a stripped down version of LSOR
360      - SOLV_MAX_ITERS is now used for LSOR as a solver and as a
361        preconditioner. For the preconditioner, the default is set to 10.
362      - Jacobian times vector is computed with finite differences
363      - marginally related to JFNK-solver: add a smooth regularization for
364        zeta with tanh that will improve convergence (Lemieux and Tremblay,
365        2009) for any implicit solver (not implemented for EVP because EVP
366        does not need this regularization in the first place). Define
367        SEAICE_ZETA_SMOOTHREG in SEAICE_OPTIONS.h to use.
368    o eesupp/src:
369      - check in genmake2 that intrinsic S/R flush is available.
370      - add S/R to flush IO unit (if intrinsic S/R flush is available)
371      - flush standard & error msg unit before MPI termination
372      - if debugMode, flush IO unit after printing msg
373    o pkg/ctrl:
374      - ctrl_unpack.F, ALLOW_GENARR3D_CONTROL code: fix missing argument in call
375        to ctrl_set_unpack_xyz.
376    
377    checkpoint64 (2012/10/09)
378  o pkg/shelfice  o pkg/shelfice
379    in mom_fluxform.F, mom_vecinv.F:    - in mom_fluxform.F, mom_vecinv.F:
380    CALL SHELFICE_V_DRAG(bi,bj,k,vFld,KE,KappaRU,vF,myThid)      CALL SHELFICE_V_DRAG(bi,bj,k,vFld,KE,KappaRU,vF,myThid)
381    Bug fix KappaRU -> KappaRV      Bug fix KappaRU -> KappaRV
382    does not change verification/isomip but may change other setups      does not change verification/isomip but may change other setups
383    (presumably constant KappaRU=KappaRV)      (presumably constant KappaRU=KappaRV)
384    - fix diagnostics SHIU/Vdrag (thanks to Tom Millgate)    - fix diagnostics SHIU/Vdrag (thanks to Tom Millgate)
385  o pkg/obcs:  o pkg/obcs:
386    - fixed some indexing bugs in obcs_seaice_sponge.F    - fixed some indexing bugs in obcs_seaice_sponge.F

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