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-revision 1.1596 by gforget,
Mon Feb 13 23:45:41 2012 UTC
+revision 1.1618 by mlosch,
Mon Mar 12 16:51:37 2012 UTC
 Line 4 
 $Name$
      Notes on tags used in MITgcmUV
      ==============================
- o pkg/seaice :
+ o pkg/shelfice
-   - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula.EQ.
+  - improve computation of friction velocity for velocity dependent
-or 2, using newly added run time parameter SEAICE_availHeatTaper.
+    exchange coefficients: include velocities into SHELFICEBoundaryLayer
+    block to average velocities vertically
+  - add TAF store directives for SHI_ALLOW_GAMMAFRICT
+ o Modify diagonal solvers, now three versions (upon request):
+   #ifndef SOLVE_DIAGONAL_AUTODIFF
+. default version (dating back a while ago)
+   #else /* def SOLVE_DIAGONAL_AUTODIFF */
+   # ifdef SOLVE_DIAGONAL_KINNER
+. adjoinable version with k-innermost loop (G. Forget)
+   # else
+. adjoinable vectorized version of 2.
+   # endif
+   #endif /* SOLVE_DIAGONAL_AUTODIFF */
+   All flags are currently set within routines, but could/should be moved to CPP-options.
+   Array bounds for 1. are as before, for 2.,3. cover the entire domain
+   (could be changed for 1. too).
+ o verification/lab_sea (fwd):
+   - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
+     use 7 categories (except hb87), new solve4temp params (except salt_plume),
+     constant salinity (=4) or variable salinity (salt_plume) done through
+     SItracer.
+ o pkg/seaice:
+   - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
+   - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
+      SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
+     from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
+     SEAICE_freeze got retired) but already better than previously with
+     SEAICE_freeze=123456.7 deg.C;
+   - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
+     (safer multi-threaded setting); always set SEAICEuseEVP;
+   - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
+     SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
+     stop if multiple specifications for the same coeff; make sure default
+     SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
+ o pkg/obcs:
+   - allow to switch to upwind 1rst order advection scheme for the advective
+     flux computation at the open-boundary; disabled for adjoint built.
+ o pkg/ptracers:
+   - rename PTRACERS_RESTART.h -> PTRACERS_START.h
+   - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
+   - add parameter to decide when to start a tracer; use internal flag to
+     know which tracer to step-forward; switch this internal flag at the top
+     of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
+     for adjoint built.
+ o pkg/seaice:
+   - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
+   - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
+   - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
+ o pkg/ecco:
+   - fix writing of output file DiagnosCost_ClimSalt/Theta
+     and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
+ o pkg/seaice:
+   - add missing initialisation of COR_ICE array in dynsolver.F
+   - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
+     compiled either way, and is tested in all exps (multidim was only tested
+     in lab_sea ad before).
+   - cosmetic change to prepare for future addition of ITD. no change to results.
+     no defaults change.
+   - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
+   - by lack of adequate verification experiments, I further used custom versions
+     of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
+     should be correct.
+   - avoid recomputations in ad.
+ o array initialisation in adjoint mode:
+) pkg/mom_common/mom_calc_ke.F:
+     add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
+     The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
+     part this initialisation is gone, resulting in Floating Point Exception
+     (caught by open64 compiler with debug option).
+) model/src/convective_weights.F
+     set output convectCount over the full array range (instead of doing
+     an update): this fix a similar issue when called within recomputation (adjoint)
+     which could by-pass the initialisation (normally done in the caller S/R).
+ o pkg/seaice:
+   - final version of turbulent flux params, as agreed at MIT ice meet:
+        SEAICE_mcPheePiston (default is ~ 0.000875)
+        SEAICE_mcPheeTaper (default is 0.)
+        SEAICE_frazilFrac (defualt is 1.)
+        SEAICE_mcPheeStepFunc (default is false)
+   - changes results at trunction error level
+   - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
+ o added pkg/frazil:
+   - see frazil_description.tex for details
+   - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
+ o pkg/shelfice/shelfice_thermodynamics.F
+   - fix exponents for velocity dependent exchange coefficients: change
+     from 2/3(=0) to 0.66666666666666667
+   - move computation of velocity dependent exchange coefficients into
+     separate loop, so that it applies to both thermodynamics
+   - move some divisions by constants out of loops
+ checkpoint63j (2012/02/16)
+ o pkg/seaice:
+   - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
+   - SItracer:  added run time params, and allow coupling to ocn salinity.
+ o pkg/seaice: remove (almost) all divisions by constants within loops
+   in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
+   results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
+   those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
+   output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
+ o pkg/seaice :
+   - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
+     = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
    - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
    - add permanent SItflux diag that corresponds to TFLUX but includes
-   ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
+     ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
    - allow activation/testing of a fix for suspected missing term in
-   ocn-ice heat budget (to be confirmed). To test this, you want to
+     ocn-ice heat budget (to be confirmed). To test this, you want to
-   undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
+     undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
-   SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
+     SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
    - no change in results, fwd or ad.
- o global_ocean.cs32x15/results: three changes following from the pkg/seaice commit below.
+ o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
    - switch to variable freezing point.
         Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
    - bug fix : the sublimation term that was missing is now activated.
         Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
    - bug fix : flooding sign term for SIsal0.NE.0.
         Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
  o pkg/seaice:
    - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
-  is now the default, and the old default constant freezing point is recovered with
+     is now the default, and the old default constant freezing point is recovered
-  SEAICE_tempFrz0    = -1.96,
+     with SEAICE_tempFrz0    = -1.96,
-  SEAICE_dTempFrz_dS = 0.,
+          SEAICE_dTempFrz_dS = 0.,
-   - retire SEAICE_freeze that was the old way of specifycing the constant freezing point.
+   - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
    - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
    - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
-  activated. To reproduce old results that had this bug define SEAICE_DISABLE_SUBLIM.
+     activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
    - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
-  was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
+     was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
    - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
-  seaice_growth r149 for legacy branch (no results change).
+     seaice_growth r149 for legacy branch (no results change).
-   - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code from I. Fenty).
+   - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
-   - results did not change except for global_ocean.cs32x15, mostly due to the switch
+     from I. Fenty).
-   to variable freezing point (see above item for detail).
+   - results did not change except for global_ocean.cs32x15, mostly due to the
+     switch to variable freezing point (see above item for detail).
  o pkg/thsice:
    - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
      seawater freezing in thsice_calc_thickn (not used).
  o pkg/seaice: turbulent flux term specification via run time params.
    - replace CPP switches with run time switches to facilitate testing
-   - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX, GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
+   - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
+                    GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
    - added runtime parameter : SEAICEturbFluxFormula
    - move Mcphee constants to SEAICE_PARAMS.h
    - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
-     SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply); remove
+              SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
-     seaice_summary call (moved to seaice_init_fixed)
+              remove seaice_summary call (moved to seaice_init_fixed)
    - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
      SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
-   - seaice_summary.F : add missing report of read turbulent flux term set up (and SITRACER).
+   - seaice_summary.F : add missing report of read turbulent flux term set up
-   - seaice_check.F : check range; inform and stop if retired CPPs are used (incl. SEAICE_AGE).
+                        and SITRACER.
+   - seaice_check.F : check range; inform and stop if retired CPPs are used
+                      (incl. SEAICE_AGE).
    - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
-         CPP switch, same computation as before for the different options.
+          CPP switch, same computation as before for the different options.
    - change results at the truncation level.
  o pkg/seaice:
    - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:

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