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Notes on tags used in MITgcmUV |
Notes on tags used in MITgcmUV |
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============================== |
============================== |
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o verification/offline_exf_seaice and lab_sea adjoint: |
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- switch to new code (#undef SEAICE_GROWTH_LEGACY). |
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- switch to 4 time steps in offline, consistent with lab_sea. |
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- match paramaters from SEAICE_GROWTH_LEGACY branch in data.seaice. |
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- update results after change of experiment seaice. |
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o model/src: |
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- add run-time parameter to select CG2D solver minimum-residual solution |
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(in case of a poor convergence). |
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o pkg/seaice/seaice_lsr.F |
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- move calculation of matrix coefficients into new |
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S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same |
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file; the main purpose of this change is to be able to reuse the code |
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in S/R SEAICE_PRECONDITIONER |
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- modify the computation of the residual so that the mass of sea-ice |
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is not used twice; this simplyfies the calculations, but since |
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the residual is never used except when LSR_mixIniGuess.ge.4---and this is |
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not tested in testreport---this does not affect the testreport results. |
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o verification/seaice_obcs: |
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- disable SEAICE_GROWTH_LEGACY; reset input files to match those of |
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verification/lab_sea/input.salt_plume; changes results/output.txt* |
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o model/src: |
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- adapt quasi-hydrostatic formulation to work with p or p* coordinate. |
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o pkg/seaice: |
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- improve description of parameters in seaice_fgmres.F and start |
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cleaning up the code |
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- change name of SCALPROD to SEAICE_SCALPROD and modify meaning of |
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second argument |
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- add a metric based on grid cell area to SEAICE_SCALPROD; update |
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results of offline_exf_seaice.dyn_jfnk |
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- compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD |
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o pkg/aim_v23: |
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- fix an other bug in dissipation heating (grid-cell area was missing). |
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o model/src + pkg/seaice: |
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- add global (multi-tile) linear solver for pair of tri-diagonal system |
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along X and Y lines, respectively for U and V component. |
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Note: 1) MPI and cube-exchange not yet coded. |
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2) probably not accurate for poorly conditioned / large size problem. |
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- add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver; |
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default: not compiled and not used. |
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o pkg/seaice: |
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- first attempt at a multi-threaded fgmres solver for the JFNK solver: |
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introduce bi/bj loops and use global_sum_tile_rl instead of |
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mpi_allreduce in seaice_fgmres.F |
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- improve diagnostics output for fgmres solver (seaice_fgmres.F) |
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- replace a few unnecessary goto statements by if-blocks (seaice_fgmres.F) |
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- add a verification experiment for JFNK in offline_exf_seaice |
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o verification: |
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- change (for now, only fwd test) offline_exf_seaice experiment: |
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use a re-entrant channel with idealized costline (trapezoidal shape) |
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at southern boundary to explore seaice dynamics and thermodynamics |
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with simple forcing. Main set-up has dynamics+thermo and SST relaxation; |
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secondary test (input.thsice) use thermodynamics only with SST relaxation. |
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- add seaice-dynamics only secondary test using LSR and pkg/thsice advection. |
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o pkg/exf: |
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- disable "sstExtrapol" when Nr=1 |
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o verification: |
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- add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble) |
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to test pkg/cheapaml. |
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o pkg/aim_v23 & pkg/shap_filt: |
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- fix dissipation heating (erroneous gravity multiplication factor). |
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o pkg/seaice: |
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- remove unused field pressPre from jfnk solver |
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- rename two subroutines in seaice_preconditioner.F |
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o eesupp/src: |
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- S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...) |
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o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again |
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- remove wrong parts of the rhs and the lhs (were in there |
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because I did not understand the concept of this preconditioner) |
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- add an exchange between u- and v-sweep. This increases communication |
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by a factor of two but improves the convergence of jfnk. Ideally, |
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one would like the u- and v-sweep to be independent. So far within |
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undocumented ifdefs |
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- reorganize the extra computations for printing the residuals |
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o tools/genmake2: |
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- comment out the "mpif.h" include in NetCDF test programm (for MPI built) |
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since it's not necessary (and was preventing to use MNC in some cases). |
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checkpoint64a (2012/11/16) |
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o pkg/autodiff: |
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- improve pkg-internal logical parameter switch (inAd/inFwd mode) so that |
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autodiff_readparms.F no longer depends on calling order (within |
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packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h): |
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rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd |
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and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd. |
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o pkg/obcs: |
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- adding tidal velocity forcing capability to obcs |
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for usage example, see verification/seaice_obcs/input.tides |
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o pkg/seaice: |
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- turn the LSR-relaxation parameters WFAU/V into runtime parameters |
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SEAICE_LSRrelaxU/V |
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- introduce runtime parameter SEAICEetaZmethod (=0 by default) |
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o pkg/aim_v23: |
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- implement heating from friction (bottom friction and stratospheric drag). |
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o pkg/shap_filt: |
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- fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from |
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dissipation but only for Shap_funct=2, active when addFrictionHeating=T. |
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o model/src: |
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- move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in |
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time-constant addMass field from file (addMassFile); |
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- support for heating due to friction (and Kinetic Energy dissipation): |
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add option, run-time switch and 3-D field array + support code ; each pkg |
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or S/R can add heating contribution (if there is a sink of KE); the sum is |
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accounted for as a Temperature tendency term (EXTERNAL_FORCING_T). |
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o pkg/seaice: |
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- complete merge of ITD code into seaice_growth.F |
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from MITgcm_contrib/torge/itd/code/ |
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no verification so far, but Torge Martin tested |
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"1-D test case and Beaufort set up; |
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deliver okay results after 1 model year." |
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- complete merge of SEAICE_SIZE.h into all relevant routines |
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- move computation of eta at Z-points into calc_viscosities |
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+ introduce global field etaZ |
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+ add different methods for computing etaZ, for now the old |
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method (simple averages of eta to Z-points) is hardwired |
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+ replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual, |
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seaice_preconditioner |
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- simplify computations for SEAICE_ZETA_SMOOTHREG |
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- seaice_preconditioner: |
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+ replace one remaining press by pressLoc (mistake) |
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+ adjust printing of residuals |
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- improve I/O of diagnostics of JFNK in seaice_jfnk.F: |
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+ add (SEAICE.h) and rename some counters (initiliased in |
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seaice_init_fixed.F) |
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+ add _BEGIN/END_MASTER (myThid) around print statements |
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+ print total number of iterations and failures over SEAICE_monFreq |
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interval to STDOUT |
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- move control over output-messages by fgmres to seaice_jfnk to save |
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some operations |
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- move resetting initial guess for fgmres outside of seaice_fgmres_driver |
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in order to make restarts with sol .ne. zero (fgmres with restarts) |
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(seaice_jfnk.F, seaice_fgmres.F) |
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- seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes |
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a serious convergence problem when open boundaries are involved |
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o pkg/ggl90: fix computation of control volumes for the case of |
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ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes |
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up half a grid cell from C-centered to W-centered (pointed out by C. Eden) |
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o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC |
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o pkg/autodiff |
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- Add inAdMode switch for SEAICEuseDYNAMICS: |
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SEAICEuseDYNAMICSinAdMode |
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(extend logic in ADAUTODIFF_INADMODE_SET) |
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o pkg/seaice |
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- Step 1 of merging ice-thickness distribution (ITD) code from |
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MITgcm_contrib/torge/itd/ (author: Torge Martin) |
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The code implements concept laid out in Thorndike et al. (1975); |
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code is enabled via CPP flag SEAICE_ITD |
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nITD (in SEAICE_SIZE.h) defines number of ice thickness categories; |
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code is not complete yet!! |
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- SEAICE_SIZE.h now included in almost all seaice routines |
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o verification (using seaice): |
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- switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp. |
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global_ocean.cs32x15.seaice ; update results. |
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- compile B-grid dynamics in FW test exp 1D_ocean_ice_column ; |
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- compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp |
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offline_exf_seaice (previously compiling B-grid). |
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o pkg/exf: |
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- fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow |
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to specify neither just 1 comp of wind or wind-stress, nor no surface momentum |
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forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind. |
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o pkg/layers (adjust changes from Sept 19): |
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- do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F) |
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this allows to remove "layers_maxNum" dimension from all layers arrays. |
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o pkg/layers (adjust changes from Sept 19): |
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- remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ; |
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- snap-shot extended to all type of layers (not just the 1rst type); |
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- remove layers variables when corresponding CPP option is undef. |
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o pkg/layers: |
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- rename pkg/layers variable and add new output (layer exist & un-weighted |
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velocity in layer) |
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o pkg/seaice: |
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- simplify (?) ocean-drag coefficent computations by using |
| 178 |
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the same routine in all three solvers (saves some code lines) |
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- remove global fields DRAGA and DRAGS from C-grid code and |
| 180 |
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declare them locally in lsr.F (the only place where they are |
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still used) |
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- update AD output of lab_sea.evp (very sensitive anyway). |
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o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics |
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(Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK |
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and SEAICEuseJFNK=.true. A few things to note: |
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- involves a FGMRES, that is parallel but very inefficient, |
| 187 |
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because of many scalar products (global sums) in the Gram-Schmidt |
| 188 |
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orthogonalization method. Needs to be replaced. Original code |
| 189 |
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from J.-F. Lemieux |
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- preconditioner for FGMRES is a stripped down version of LSOR |
| 191 |
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- SOLV_MAX_ITERS is now used for LSOR as a solver and as a |
| 192 |
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preconditioner. For the preconditioner, the default is set to 10. |
| 193 |
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- Jacobian times vector is computed with finite differences |
| 194 |
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- marginally related to JFNK-solver: add a smooth regularization for |
| 195 |
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zeta with tanh that will improve convergence (Lemieux and Tremblay, |
| 196 |
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2009) for any implicit solver (not implemented for EVP because EVP |
| 197 |
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does not need this regularization in the first place). Define |
| 198 |
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SEAICE_ZETA_SMOOTHREG in SEAICE_OPTIONS.h to use. |
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o eesupp/src: |
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- check in genmake2 that intrinsic S/R flush is available. |
| 201 |
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- add S/R to flush IO unit (if intrinsic S/R flush is available) |
| 202 |
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- flush standard & error msg unit before MPI termination |
| 203 |
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- if debugMode, flush IO unit after printing msg |
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o pkg/ctrl: |
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- ctrl_unpack.F, ALLOW_GENARR3D_CONTROL code: fix missing argument in call |
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to ctrl_set_unpack_xyz. |
| 207 |
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|
| 208 |
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checkpoint64 (2012/10/09) |
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o pkg/shelfice |
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- in mom_fluxform.F, mom_vecinv.F: |
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CALL SHELFICE_V_DRAG(bi,bj,k,vFld,KE,KappaRU,vF,myThid) |
| 212 |
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Bug fix KappaRU -> KappaRV |
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does not change verification/isomip but may change other setups |
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(presumably constant KappaRU=KappaRV) |
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- fix diagnostics SHIU/Vdrag (thanks to Tom Millgate) |
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o pkg/obcs: |
o pkg/obcs: |
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- fixed some indexing bugs in obcs_seaice_sponge.F |
- fixed some indexing bugs in obcs_seaice_sponge.F |
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- added obcs relaxation subroutines for HSALT and HSNOW |
- added obcs relaxation subroutines for HSALT and HSNOW |
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