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-revision 1.1312 by mlosch,
Fri Oct 15 15:18:20 2010 UTC
+revision 1.1586 by jmc,
Tue Jan 31 17:12:24 2012 UTC
 Line 4 
 $Name$
      Notes on tags used in MITgcmUV
      ==============================
- o pkg/thsice:
+ o pkg/seaice:
-   - vectorize thsice_solve4temp and thsice_get_exf.
+   - lots of editing/cleaning in seaice_solve4temp.F + better documentation
+     of arrays, sign/direction of fluxes; no effect on results.
+   - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
+     in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
+     note: this should have been done before changing celsius2K default.
+   - to keep results unchanged, add back old value of celsius2K in verification
+     exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
+   - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
+     SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
+     value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
+     freezing temp is consistent with value in seaice_growth.F ; this causes
+     differences at machine truncation level: update lab_sea AD output (3/4).
+ o pkg/seaice:
+   - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
+     and climsst/sss even when using seaice (to prevent calculation that might
+     use SST on land); does not affect any verification exp.
+   - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
+     of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
+ o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
+   over land (non-legacy code)
+ o vectorize salt_plume package:
+   - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
+   - this code computes plumebk everywhere (also over land), thus requires
+     code to avoid divisions by zero and catch the case of kLev=Nr.
+   - efficiency of salt_plume_frac is still sub-optimal
+ o tools (genmake2):
+   - fix makefile NAME specification (option: -makefile NAME) by adding
+     "-f $MAKEFILE" in few places where it was missing including makedepend
+     command (contribution from Paul).
+ checkpoint63i (2012/01/24)
+ o model/src:
+   - add factorized versions of some EOS code to find_rho.F,
+     define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
+ o model/src:
+   - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
+   - change default celsius2K from 273.16 to 273.15
+   - to keep results unchanged, add back old value of celsius2K in verification
+     exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
+      global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
+ o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
+   to make TAF generate vectorizable code
+ o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
+    Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
+    have flags that do this more efficiently.
+ o pkg/diagnostics/diagstats_calc.F
+   - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
+ o pkg/obcs (with exch2):
+   - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
+     and remove code (in obcs_readparms.F) which was based on EXCH of indices
+     (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
+ o pkg/exf and seaice exp:
+   - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
+     so that switching off area & heff advection flags does not affect results.
+   - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
+   - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
+     EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
+     results of verification experiments: 1D_ocean_ice_column(fwd),
+     global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
+     and offline_exf_seaice (all 4).
+ o pkg/seaice:
+   - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
+     remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
+   - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
+     but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
+     not multi-dim advection;
+   - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
+     SHORTWAVE_HEATING #undef.
+ o optim: make Makefile more robust (?)
+ o pkg/obcs:
+   * fix treatment of obcs_read_pickup for TAF
+ o pkg/shelfice:
+   * add missing initialisation of num_shifwflx
+   * new adjoint verification exp. for isomip
+   * change Prandtl and Schmidt numbers from generic formulations
+     (in terms of model diffus. and visc.) to separate runtime
+     parameters, with Holland and Jenkins (1999) default values.
+ o pkg/exf (interpolation):
+   - extended input field (2 rows) near the N & S poles:
+     * fill in with the symetric value (when even Nb of data in longitude)
+     * add average value at the poles only for scalar quantities ; for vector
+       component interpolation, skip the averaging and keep duplicated values,
+       unless the 2 components have same location (uvInterp=T) in which case
+       interpolate the 2 components together using S/R EXF_INTERP_UV.
+   - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
+     together: this allows to account properly for local orientation when
+     averaging at N & S pole.
+   - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
+     exf-interpolation near N & S poles. Undef by default.
+   - add debug check/print on 1rst iter if debugLevel >=2.
+ o pkg/exf:
+   - change masking flags definition (no longer "parameter"), put them in
+     common block and set them in S/R EXF_INIT_FIXED.
+   - change recognized masking flag from s,u,v to c,w,s since the mask
+     to use (maskC,W,S) depends on position on model grid and has little to
+     do with scalar/vector difference; fix masking if using P-coordinates.
+   - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
+     and update results of exp. global_with_exf (x2).
+   - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
+ o pkg/obcs
+   - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
+ o pkg/exf (interpolation):
+   - assume periodicity in X only if input field cover full longitude range.
+   - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
+     and should vectorise).
+   - fix input lat of the 2 added row (in case we provide N.pole data).
+ checkpoint63h (2011/12/30)
+ o pkg/seaice:
+   - change declaration of UVM from _RL to _RS in order to get B-grid
+     uIce,vIce monitor when _RS = real*4
+ o pkg/offline:
+   - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
+   - compute vertical velocity if not read from file (switch on exactConserv
+     & staggerTimeStep);
+   - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
+ o verification:
+   - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
+     with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
+     fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
+   - update output of exp. global_ocean.cs32x15.viscA4 after changing
+     grid-file angles (used here for coriolis-3d);
+   - remove (or gzip) few files not needed to run fizhi-cs experiments.
+ o pkg/exf (vector interpolation):
+   - rotate vector component toward local grid-axis orientation using grid-angles
+     (stored in GRID.h) instead of locally computed rotation angle; keep old code
+     available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
+ o pkg/seaice:
+   - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
+     undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
+ o pkg/PKG_OPTIONS.h files:
+   - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
+     outside of the #ifdef ALLOW_THISPKG / #endif block.
+   - update verification/*/code/PKG_OPTIONS.h files.
+ o add a verification experiment (offline_exf_seaice/input.seaice) that test
+   the B-grid LSOR solver
+ o pkg/seaice: sort out emissivity and long wave radiation step 2:
+   - add emissivity for snow and ice as new run-time parameters
+     (unfortunately) that default to the corresponding exf values; this
+     changes results in most verification experiments so that for backward
+     compatibility these parameter have to be set explicitly to inconsistent
+     values (ugly);
+   - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
+     emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
+     until we agree how to handle this bug properly
+ o pkg/exf (interpolation):
+   - add a set of run-time param ({inputfield}_interpMethod), one for
+     each interpolated input field, to select the interpolation method
+     with a value of zero switching off the interpolation;
+   - print interpolation parameters to standard output;
+   - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
+     (to use instead runoff_interpMethod=0 in data.exf).
+   - simplify default setting of interpolation parameters (for all fields,
+     set position to match model grid cell-center position, leading to trivial
+     interpolation in case of regular Lat-Lon grid) and fix for the case of
+     non-uniform delY.
+ o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
+    within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
+    this factor is absolutely required, because the lw exitance (= out-going
+    long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
+    where the reflectivity rho = 1-emissivity for conservation reasons. Once
+    this is established, we can remove the CPP-Flag (if we want to).
+ o pkg/seaice:
+   - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
+     ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
+   - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
+     what the name implies (and not emissivity*BoltzmannConstant), this means
+     the old default value of 5.5e-8 now means
+.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
+     S/R exf_readparms
+   - FV-discretization of the B-grid LSOR solver, turn on with
+     SEAICE_LSRBNEW. This new solver also involves a slight re-organization
+     of the calling routine dynsolver, so that B and C-grid code look a
+     little more alike.
+   - fix index bugs in ostres.F (B-grid code)
+ o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
+ o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
+   default for SEAICE_emissivity, if useEXF; requires setting a wrong
+   parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
+   backward compatiblity
+ o model/src: use sigmaR in calc_ivdc
+ checkpoint63g (2011/12/16)
+ o pkg/seaice/seaice_growth.F:
+   fix heat conservation of the coupled ocean-seaice system.
+   when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
+   solid vs liquid water treatment is resolved via QNET.
+ o pkg/seaice/seaice_growth.F:
+   add missing term for sublimation in saltFlux, which was breaking conservation.
+ o pkg/seaice/seaice_model.F:
+   Remove this patholigical case treatment in evolution branch,
+   where it is un-necessary and breaks conservation.
+   Update global_ocean.cs32x15/results accordingly for
+   output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
+ o model/src:
+   useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
+   external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
+ o pkg/obcs:
+   modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
+   tendency for temperature and salinity that is then applied to update
+   theta and salt in S/R obcs_apply_ts; this requires proper masking of all
+   horizontal advection and diffusion contributions on the boundary (in
+   S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
+   removing the mask in S/R timestep_tracer. The advantage of this approach is
+   that the updated tracer values include contributions from the surface
+   forcing and vertical diffusion.
+   This modification changes exp4.stevens because of vertical diffusion.
+ o model/src:
+   change non-curvilinear grid setting to also work with exch2 + blank tiles:
+   - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
+     face dimensions.
+   - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
+     as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
+     and INI_SPHERICAL_POLAR_GRID.
+   change test-experiment global_ocean.90x40x15:
+   - split the domain in many more tiles (9x4 tiles of 10x10 each);
+   - switch to exch2 and remove 1 blank-tile (but only for MPI test).
+   - update results of both test (std & dwnslp).
+ o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
+    tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
+ o model/src:
+   - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
+     and fix initialisation when using sigma-coords.
+ o model/src:
+  - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
+    to their current value at the beginning of forward_step.F": add a new run-time
+    switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
+  - set doResetHFactors=T in the following test exp:
+     global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
+     global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
+     and tutorial_global_oce_in_p (nonLinFS in p)
+ o pkg/ecco
+   - added IES cost term
+ o verification/advect_xz
+   - scale down the depth by 1/100 (from 200 km to just 2.km)
+   - add secondary test using divergent flow, r-star and implicit vertical advection.
+   - add note (check_conserve_TS.txt) and matlab script to check global
+     conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
+ o pkg/rbcs:
+   - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
+ o pkg/obcs (Stevens BCs):
+   - fix various problems in the phase speed computations of the Stevens
+     boundary conditions:
+     - sign error for western and southern boundaries,
+     - time tendencies were underestimated by factor of dTracerLev and some just
+       zero (for multidim advection schemes) -> now estimate time tendencies
+       from difference between previous (n) time level and the one before (n-1);
+       this requires storing a field per tracer per boundary, also in the pickup
+       files.
+     - replace deltaTmom in cflMer/Zon computation with dTracerLev
+     - set default phase velocity to cflMer/Zon
+   - update verification experiment exp4.stevens
+ o pkg/generic_advdiff (implicit_r):
+   - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
+     (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
+   - fix implicit vertical diffusion or advection with NonLin FreeSurf
+     (was using current recip_hFacC instead of future recip_hFacC): set future
+     recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
+     solver S/R ;
+   - fill diagnostics of vertical advective fluxes (computed from tendency)
+     when using implicit vert. advection;
+   - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
+      global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
+      tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
+      and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
+ o pkg/diagnostics:
+   - add diags for T & S tendency which goes through Adams-Bashforth.
+ checkpoint63f (2011/11/30)
+ o pkg/obcs/obcs_calc_stevens.F:
+   - join some loops to reduce number of if-statements
+   - fix a bug in code for northern and southern boundaries.
+ o pkg/seaice/seaice_init_varia.F
+   - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
+     caused zero ice-velocities for the B-grid code
+ o pkg/seaice/seaice_init_fixed.F
+   - fix a bug in the initialisation of the second metric terms
+     k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
+   - this affects all seaice configurations with useCurviLinearGrid = .true.
+     and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
+     = .true. (default)
+   - the only verification experiment affected is global_ocean.cs32x15:
+     icedyn, seaice, and seaice_dynmix (AD)
+ o pkg/thsice/thsice_diagnostics_state.F
+   - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
+     not contain garbage that can lead to surprises in diagstats_calc.F
+ o model/src:
+   - move bi,bj loops inside INTEGR_CONTINUITY ;
+   - call INTEGR_CONTINUITY directly from forward_step.F
+     (previously called from momentum_correction_step.F)
+   - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
+     forward_step.F and pkg/ecco/the_main_loop.F
+ o model/src/do_oceanic_phys.F:
+   - reset addMass to zero only if useICEFRONT ;
+   - separated k-loop for rhoInSitu calculation ;
+   - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
+     and at constant T,S (= WdRHOdP);
+   NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
+     of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
+     transport of locally-referenced potential density);
+     to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
+ o gluemnc:
+   - replace ncrcat with ncks when adding variables to *.glob.nc
+   - change the way variables without record dimensions are handled so that
+     files that have variables with and without record variables can be glued:
+     add a record dimension with a new unique name to be able to differentiate
+     between variable with and without a-prior record dimensions. Remove
+     this record dimension before adding the variable to the *.glob.nc file.
+     This procedure automatically works also for grid.*.nc files that do not
+     have any record dimension.
+ o verification/cpl_aim+ocn:
+   - generate new reference output on baudelaire (gfortran, mpich2) (previously
+     from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
+ o pkg/obcs/obcs_calc_stevens.F:
+   - add code for northern and southern boundaries.
+   - reorder some loops to save some operations and so that drFBar can be scalar
+ o model/src:
+   - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
+     truncation) and add diagnostics for Adams-Bashforth tendency increment.
+   - update test-exp. AD output:
+D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
+   and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
+     front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
+     global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
+     matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
+     tutorial_global_oce_in_p, tutorial_global_oce_latlon and
+     tutorial_plume_on_slope.
+ o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
+   that vectorises. This code uses 3 extra 2D fields, F90 array assignments
+   and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
+   does not even come with an F77 compiler anymore, this should not be
+   a limitation
+ checkpoint63e (2011/11/06)
+ o pkg/seaice adjoint of LSR:
+   - substantially rework STORE dirs.
+   - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
+     this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
+     and only perform SOLV_MAX_FIXED adjoint iters.
+     If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
+     always goes to same record, meaning that the last forward field will be
+     the one used in the adjoint - an approximation.
+   - now produces non-zero LSR-related gradients, and acceptable gradients for
+     An's zonal (x-z) test case (to be checked in)
+   - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
+     (but these are screwed up by the thermodynamics in the first place);
+     reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
+     output_adm.txt also reflects changes to seaice_lsr
+   - global_ocean.cs32x15:
+     * the "default" input_ad.seaice has been re-defined to always exclude dynamics
+       (output_adm.seaice.txt was updated)
+     * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
+       (output_adm.seaice_dynmix.txt)
+ o test-exp. exp4+stevens:
+   - switch off pTracers and nonHydrostatic (restart problems with NH); update output
+ o pkg/seaice (lsr solver):
+   - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
+     update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
+   - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
+   - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
+     into initial guess for linearised solver; use weight ~ (1/err)^2,4.
+   - compute (with new S/R) and print initial (+ free-driff sol. if available)
+     and final residual of linearised system.
+ o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
+   (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
+ o pkg/obcs: Stevens BCs (still only for east and west)
+   - fix Stevens BCs by using intermediate velocities of previous
+     time step as "baroclinic" contribution rather velocity of one grid cell
+     inside the boundaries; more consistent but makes the entire treatment
+     more complicated, requires new pickup files and two new S/Rs:
+     obcs_copy_uv_n and obcs_save_uv_n
+     keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
+     (undefined by default)
+   - silently move computation of some grid factors into separate loops to
+     save some recomputations
+   - add a hack for non-linear free surface
+   - add a verification experiment to exp4 that tests this code
+ o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
+ checkpoint63d (2011/10/25)
+ o pkg/obcs + seaice-dynamics:
+   - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
+     solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
+     values (consistent with an implicit method).
+   - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
+     return to older implementation (same results as before); note that none of
+     the "experimental" OBCS_SEAICE options are implemented in the new version.
+   - switch test exp. seaice_obcs to use new version (update output).
+ o pkg/seaice:
+   - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
+   - add parenthesis in Water-Ice drag calculations (evp & lsr);
+   - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
+     and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
+   - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
+     and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
+ o pkg/layers:
+   - Include potential density as new coordinate (Thanks to David Munday)
+ o pkg/dic:
+   - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
+     carbonate computation/output to CALC_PCO2_APPROX
+ o pkg/generic_advdiff
+   - make TAF generate code that vectorizes:
+     gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
+ o model/src:
+   - improve vectorization also for adjoint code of
+     solve_tridiagonal and solve_pentadiagonal. As this requires up to
+new 3D-fields, this code is only turned on for the combination of
+     ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
+     for singular matrix check (only for TARGET_NEC_SX).
+   - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
+     ALLOW_AUTODIFF. This flag now needs to be set outside of
+     solve_tri/pentadiagonal.F
+ o pkg/exf:
+   - fix previous modif in exf_readparms.F (revision 1.66: treatment of
+     optional namelist EXF_NML_OBCS).
+   - add many debug-print (to trace down where pkg/cal error msg comes from)
+ o pkg/mom_vecinv/mom_vi_hdissip.F
+   - rearrange loops so that vectorization is improved and in particular
+     the adjoint routine vectorizes. The code is a little longer now, but I
+     think easier to read.
+     Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
+ o pkg/seaice:
+   - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
+ o pkg/exch2:
+   - alternative code (without tile x tile matrix) for cumulated (global) sum;
+     used as default; keep using matrix version in adjustment.cs-32x32x1.
+ o tools/build_options:
+   - after merging some MPI and/or multi-threads specific optfiles so that
+     the modified default optfile support both built (using genmake2 -mpi
+     for the MPI built, using genmake2 -omp for OpenMP built),
+     move now obsolete optfiles to tools/build_options/unsupported/
+    (add copy of email sent to support list in doc/optfiles_changes.txt)
+ checkpoint63c (2011/09/28)
+ o pkg/ebm:
+   - fix ebm_zonalmean.F for several procs in Ydir (nPy > 1); update output of
+     test exp. global_ocean_ebm (affects machine truncation, 12 digits for cg2d)
+ o pkg/seaice (SItracer pickup)
+ * Simple code for pickup of SItracer fields (#define ALLOW_SITRACER)
+   To be done:
+   - thorough testing of missing fields in S/R seaice_read_pickup
+   - thorough matching between generic tracers and specific fields used
+     (e.g. volume-weighted age, area-weighted age, salinity, ...)
+ o pkg/grdchk:
+   - all procs calculate and print finite-difference gradient (for testreport)
+   - change description output used by testreport;
+   - AD testing: also compare and report Finite-difference gradient;
+     => update all output_adm*.txt
+ o test exp. global_ocean_ebm:
+   - switch back useRealFreshWaterFlux (no problem anymore with run-off);
+     and turn on exactConserve; update (fwd) output.
+ o pkg/seaice (LSR):
+   - print to STDOUT number of solver iterations at SEAICE_monFreq interval.
+   - modify solver to deal cleanly with u/v switch at face edges (CS-grid):
+     * identical results with non-CS topology (but save up to half of EXCH calls)
+     * no much changes in cs-32 verification tests since no ice at face edges
+      (differences due to convergence criteria, since nb of iterations changed)
+     * expect some differences on lat-lon-cap grid.
+     update FWD results of global_ocean.cs32x15 test exp. (icedyn & seaice)
+ o pkg/exch2:
+   - add new CPP option to disable Cumul-Sum matrix (to save storage when using
+     many tiles); until alternative coding is added, just add a stop.
+ o pkg/kpp:
+   - move ptracer/salt correction to KPP diffusivity from calc_3d_diffusivity.F
+     to S/R KPP_CALC_DIFF_PTR (+ add tracer-index to argument list).
+ o optfiles:
+   - merged few MPI specific (*+mpi*) and multi-threads specific (*+mth) optfiles
+     into corresponding standard one, which now support different build:
+     (when using "genmake2 -mpi" for MPI built, "genmake2 -omp" for OpenMP built)
+   - add "darwin_amd64_gfortran" optfile (initially from Constantinos, tested by Gael)
+ o pkg/obcs (seaice):
+   - add missing EXCH for uIce,vIce after applying OBCS;
+   - remove S/R EXF_SWAPFFIELDS_X/Y , disable S/R EXF_SET_OBCS_X/Y by adding
+     argument = number of levels to S/R EXF_SWAPFFIELDS_XZ/YZ and S/R
+     EXF_SET_OBCS_XZ/YZ ; update obcs_exf_load.F;
+   - fix EXF_SET_OBCS_XZ/YZ for multi-threaded (assuming loaded arrays are shared)
+   - verification exp. seaice_obcs: split domain in 2 tiles ; add SIZE.h_mpi
+     and eedata.mth for MPI and mutlti-threaded testing.
+ o pkg/flt:
+   - make FLT EXCH working with multi-threads (and MPI + multi-threads);
+   - use buffer for floats IO (trajectories & profiles); size set in FLT_SIZE.h;
+   - fix pickup and trajectories + profiles output with multi-threads;
+   - add parameter to select group of fields to write along trajectory and
+     profile (default unchanged);
+   - only call PORT_RAND* function when flt_noise <> 0;
+   - add multi-threaded test for verification exp. flt_example.
+ o eesupp/src:
+   - fix S/R ALL_PROC_DIE for MPI+multi-threads.
+   - USE_OMP_THREADING: check that number of threads (from eedata) matches
+     actual number (from env.var. setting).
+ o pkg/ebm:
+   - fix multi-threading in ebm_area_t.F ; clean-up EBM.h header file.
+   - add multi-threaded test for verification exp. global_ocean_ebm
+ checkpoint63b (2011/08/29)
+ o pkg/ebm:
+   - fix sign of runoff;
+   - update directly forcing fields (Qnet,EmPmR) to use standard
+     external_forcing_surf.F (remove ebm_forcing_surf.F);
+   - avoid loading forcing fields a 2nd time (1rst time from ini_forcing.F);
+   - set either tauThetaClimRelax (in data) or tauThetaZonRelax (in data.ebm)
+     and apply relaxation towards corresponding SST field (2-D map or ZonAver).
+   - update global_ocean_ebm parameters file data and update output (fwd+ad).
+ o verification/matrix_example:
+   - split domain in 8 tiles (2x4); add SIZE.h_mpi and eedata.mth for
+     MPI and mutlti-threaded testing.
+ o pkg/matrix:
+   - change name of S/R MATRIX_INIT to S/R MATRIX_INIT_VARIA ;
+   - fix for multi-tiles (add bi,bj indices to exp/impMatrixCounter);
+   - fix for multi-threaded (remove DATA statement);
+   - use standard DIFFERENT_MULTIPLE function;
+   - add MATRIX_OPTIONS.h
+ o verification/matrix_example:
+    To allow to split the domain in several tiles, change the domain size
+     from 31x31 to 32x32 by adding 1 row (on Southern side) + 1 column (on
+     Western side) of land points.
+ o (*_)write_pickup:
+   - fix few bugs in mypackage_read/write_pickup.F
+   - in MDS_WR_METAFILES calls, replace "myTime" by a local copy into
+     array of length 1 (was caught by compiler syntax-check).
+ o pkg/diagnostics (velocity potential solver):
+   - fix initialisation of main diagonal matrix (for overlap values)
+ o tools/build_options:
+   - towards single optfile for MPI and non-MPI built: merge few +mpi optfile
+     into previously non MPI one (linux_am64 pgf77,open64,pathf90,ifort11)
+   - linux_amd64_gfortran: merge +mpi_generic version into standard optfile:
+     * move IEEE flags to DEVEL section; take IEEE flags from +mpi_generic ;
+     * FAST case: for now, keep -O3 with ini_masks_etc.F in NOOPTFILES list;
+     and use "-devel" testreport option for standard testing on baudelaire.
+ o pkg/grdchk:
+   - Assume that all gradient-check position are within the same tile
+     corresponding to global indices (iGloTile,jGloTile) and that
+     positions (i,j indices or nbeg) are local to this tile;
+   - set tile local-indices and proc. number according to tile global-indices;
+   - remove grdchkwhichproc from namelist (retired param);
+   - send adjoint gradient to all procs so that all procs print it to STDOUT;
+   - switch on MPI test for global_ocean.90x40x15 AD test experiment.
+ o adding package bbl (Bottom Boundary Layer)
+   description in MITgcm/pkg/bbl/bbl_description.tex
+   example/test experiment in MITgcm_contrib/bbl
+ o adjoint verifications
+   - changed 5 experiments to multi-tiles
+     * global_ocean.90x40x15
+     * obcs_ctrl
+     * offline_exf_seaice
+     * tutorial_dic_adjoffline
+     * tutorial_tracer_adjsens
+     changed reference output for those that crossed tile boundaries
+     (changed choices of gradient check positions)
+   - with same tiling, switch on MPI test for the last 4 (add SIZE.h_mpi)
+   - temporary bug fix in grdchk_loc.F for obcs
+ o genmake2 & testreport
+   - add target "obj" (just for OBJFILES files) to Makefile;
+   - add option to specify FEXTRAFLAGS on command line.
+ o pkg/mypackage:
+   - remove bi,bj arguments from argument list of S/R MYPACKAGE_CALC_RHS
+ checkpoint63a (2011/08/02)
+ o pkg/diagnostics (velocity potential):
+   - fix velocity-potential calculation when using OBCS: balance net inflow
+     at each level (new S/R OBCS_DIAG_BALANCE).
+   - fix some of the problems with OBCS in stream-function calculation.
+ o pkg/exf/exf_readparms.F
+   - make treatment of optional namelists (EXF_NML_04, EXF_NML_SGRUNOFF,
+     EXF_NML_OBCS) more consistent, so that you need not have these lists
+     in data.exf when they are not used.
+ o optim/optim_readdata.F:
+   - add some output about obcs variables that might help debugging
+   - add a check about nvarlength
+ o pkg/ctrl: once again, fix computation of endrec in s/r ctrl_init_rec
+ o pkg/diagnostics (velocity potential):
+   - fix mask for OBCS (still problems in stream-function with OBCS);
+   - add specific parameter (default = main code CG2D params) for solver;
+   - in case of poor convergence, use solution corresponding to lowest residual.
+ o pkg/seaice/seaice_growth.F: small changes that permit vectorizable
+   adjoint code. In general statements like tmpscal=fld(i,j) are problematic
+   and should be avoided where possible.
+ o model/src (rStar):
+   - include r* effect on reference-state (PhiRef) in totPhiHyd
+     (so that it's really the potential anomaly at the cell center);
+     affect solution only if z* with full pressure in EOS.
+   - test-exp global_ocean.90x40x15: reduce viscA4 (was not stable) and
+     update output (because of z* in totPhiHyd and viscA4 changes);
+   - keep the previous diagnostics as "PHIHYDcR" (closer to potential anomaly
+     @ constant r) until interpolation at constant r is implemented.
+ o pkg/diagnostics
+   - fix RCENTER diagnostics in case cell center is not at interface middle
+ o add code for TEOS-10 (www.teos-10.org, McDougall et al. 2011). Use
+   this eos with eosType = 'TEOS10', in data (PARM01). This eos implies
+   that THETA and SALT are "conservative temperature" and "absolute
+   salinity"
+ o pkg/ctrl
+   - fix computation of endrec in s/r ctrl_init_rec
+   - ctrl_pack/unpack_*: remove unused variables and some obsolete code
+ o pkg/seaice/seaice_growth.F
+   - fix recomputation with FENTY_AREA_EXPANSION_CONTRACTION code,
+     remove then obsolete STORE directives
+   - fix STORE directives for tice and tices, so that only the
+     appropriate part of the fields are stored (and not the entire
+     field); update global_ocean.cs32x15.seaice AD output.
+   - cosmetic changes: adjust CPP flags and indentation for better
+     legibilty
+ o pkg/autodiff: add mnc-output of adBottomDragFld (code contributed by
+   Chris Wilson)
+ o pkg/gmredi:
+    Add Sub-Meso Eddies parameterisation from Baylor (for now, disabled with TAF),
+    and test it in verification exp. "front_relax.bvp" (update output.bvp.txt)
+ checkpoint63  (2011/07/11)
+ o pkg/exch2:
+  - rename+move: nTiles in W2_EXCH2_PARAMS.h --> exch2_nTiles in W2_EXCH2_TOPOLOGY.h
+  - exch2 version of Cumul-Sum routine: S/R W2_SET_MAP_CUMSUM set up the
+    (2*nTiles)x(nTiles) Cumul-Sum matrix and Master Proc collects all tiles X,Y
+    increments, calculates Cumul-Sum @ tile origin and sends results to each tile.
+ o pkg/diagnostics:
+  - deal with pairs of post-processed diags which are computed together; in
+    particular, re-order list of diags within 1 file to save 2nd computation.
+  - add S/R to compute velocity stream-function (called after velocity-potential
+    calculation) from divergence free transport -> new diagnostics "PsiVEL".
+  - add parameter to select grid-point location where PsiVEL == 0.
+ o eesupp/src:
+    new S/R to calculate cumulated sum on tiled array, corner grid-cell location
+    (specific S/R needed with exch2 topology - for now, just print an error msg)
+ o pkg/shelfice
+  - Implement friction velocity-dependent transfer coefficients following
+    Holland and Jenkins, JPO, 1999
+    Original code by M. Losch with small modifs.
+    Enable with CPP option SHI_ALLOW_GAMMAFRICT
+    and runtime flag SHELFICEuseGammaFrict
+ o verification lab_sea & global_ocean.cs32x15:
+  - use tools/xmakedepend (instead of cyrus_makedepend, in genmake_local):
+    does not miss some dependencies (but is slower) and also works with many files
+    (default makedepend limitation for AD built).
+  - use cyrus_makedepend in adjustment.128x64x1 (so that it still tested).
+ o pkg/diagnostics:
+  - add run-time parameter "useMissingValue" (def=False) to fill land-point
+     (i.e., where mask=0) with MissingValue ; used only in MNC output file.
+    This replaces CPP-option DIAGNOSTICS_MISSING_VALUE.
+  - Extend the use of "missing_value" setting from data.diagnostics for the case
+    of counter-diagnostics (where fraction-weight is zero). This applies both to
+    MNC and MDS output files.
+ o pkg/seaice/seaice_growth.F:
+   - add 'a priori' cap of latent heat flux based on actual mass considerations
+     when SEAICE_ADD_SUBLIMATION_TO_FWBUDGET is used in conjunction with the
+     non-legacy seaice_solve4temp.
+   - add diagnostic of the residual sublimation freshwater flux (the freshwater
+     flux taken from the ocean if the total actual latent heat fluxes exceed
+     the maximum)
+   - remove the CPP switch around the *_FWbySublim unit change and move diagnostic
+    fill for SIatmQnt, SIfwSubl, SIatmFW to the end of seaice_growth.F.
+   - add diagnostic of the actual sublimation freshwater flux (that is 0. ifndef
+    SEAICE_ADD_SUBLIMATION_TO_FWBUDGET) and of the latent heat flux (evap+sublim).
+   - bug fix : frWtrAtm needs a_FWbySublim ifdef SEAICE_ADD_SUBLIMATION_TO_FWBUDGET.
+   - bug fix : missing part to Martin's r_FWbySublim pathological case fix.
+ o verification 1D_ocean_ice_column:
+    made model domain truly 1x1x23 instead of 5x5x23 with only center cell (3,3,:) wet
+    update results
+ o pkg/diagnostics:
+  - Implement setting of "Post-Processed" diagnostics (corresponding to gdiag(5)='P')
+    which are not filled-up but computed from other diags ; In this case, the mate
+    diag points to the primary (filled-up) diag to used for post processing.
+  - Update Velocity-potential computation using post-processed diag framework.
+  ==> Change the ordering of fields and time-periods in MDS output file
+    when using periodic averaging: now writes one time record with the full set
+    of fields for this time period, then the next time reccord (it used to be
+    one field with the full set of time records then the next field).
+      Note: this is now similar to NetCDF (MNC) output file. <==
+ checkpoint62z (2011/06/21)
+ o adjoint monitor:
+  - Add adjoint monitor output for packages exf, seaice
+    and update relevant testreport output
+ o pkg/seaice:
+  - re-order diags inits so that they appear in order in available_diagnostics.log
+  - added diags: hsnow thermo. rates of change, area preceeding ridiging process,
+    area/heff/hsnow preceeding thermodynamic growth/melt.
+  - modified diag: SIdA; output actual effect, as the description states.
+  - modified description: SIqneti, SIqneto, SIuheff, SIvheff, SIdAb*, HSNOW.
+  - retired redundant diags: SIyneg, SIfice, SIsnwice, SIthdgrh.
+    (SIyneg->SIdHbOCN; SIfice->SIdHbATC; SIsnwice->SIdHbFLO;
+     and SIthdgrh->SIdHbOCN+SIdHbATC+SIdHbATO)
+  - modified diags (2) : switch all SIdA*, SIdH*, SIdS* from delta to rates.
+  - added diagnostics for seaice generic tracers (SItr*).
+  - added SItrUnit and SItrNameLong run time param (for SItr* diags).
+  - in diag names, replaced 'PrTh' abbrev. of 'preceeding thermo' with 'PT'.
+  I. Fenty: 18-Jun-2011:
+  Minor changes to seaice package:
+) Retired old variables (A22, SEAICE_lhsublim, areaMax, areaMin, hiceMin) and
+     added some new ones (SEAICE_area_reg, SEAICE_hice_reg, SEAICE_area_floor)
+    - Differentiated "regularization variables" from "floor variables"
+     * areaMin became SEAICE_area_reg (old A22) and SEAICE_area_floor
+     * hiceMin became SEAICE_hice_reg (old hiceMin)
+       (with _reg meaning regularization variable)
+    - SEAICE_lhSublim becomes lhSublim, the sum of SEAICE_lhEvap and SEAICE_lhFusion
+     so as to ensure energy conservation when going between phases
+   - A22 was not used anywhere
+) Changed regularization procedure for heffActual and hsnowActual to ensure
+     well-boundedness and smooth adjoint in seaice_growth.F
+) Fixed a bug where seaice_solve4temp would not recognize ice-free grid cells
+     because the old regularization always set heffActual >= 0.05 cm
+) Changed the model so that the default behavior is to put a small (10^-5) "floor"
+     on AREA when HEFF > 0.
+   - went from requiring ALLOW_PRECLUDE_INFINITESIMAL_AREA to be defined to
+     requiring that DISABLE_AREA_FLOOR *not* be defined
+  Affected verifications:
+   - 1D_ocean_ice_column (output.txt output_adm.txt)
+   - global_ocean.cs32x15 (output.seaice.txt output_adm.seaice.txt)
+ o pkg/diagnostics:
+   - move MNC code from diagnostics_out.F into new diagnostics_mnc_out.F (2 S/R).
+   - rename S/R GETDIAG to DIAGNOSTICS_GET_DIAG and change type of 1rst argument
+     (was _RL, now integer) with option = 0 to retrieve all levels.
+   - add pieces of code to compute velocity potential at each level (new diagnostics
+     PhiVEL, works only when UVELMASS & VVELMASS are also turned on);
+     for now, using same params as CG2D (target-resisual, max Nb of iter ...).
+   - fix few issues with counter diagnostics in diagnostics_setdiag.F &
+     diagstats_setdiag.F (if diagnostic counter is itself a counter diag)
+     and in diagnostics_fract_fill.F (do not need a valid pointer for the
+     diagnostics counter-mate); check that definition of counter-diagnostic
+     includes a valid counter-mate (in diagnostics_set_levels.F).
+ o model/src (rStar):
+   - add rStar scaling factor in diags_phi_hyd.F (similar to calc_grad_phi_hyd.F);
+     affect solution only if z* with full pressure in EOS;
+     update output of test-exp global_ocean.90x40x15.
+ o pkg/seaice:
+   - introduce siEps=1e-5 parameter
+   - use areaMax in AREA update (part 4), consistent with ridging step (part 2.5).
+   - re-organize SEAICE_ADD_SUBLIMATION_TO_FWBUDGET code.
+   - introduce ALLOW_SITRACER and seaice_tracer_phys.F to handle generic seaice tracer.
+     For now it covers, and was tested for, ice salinity and age (attached to HEFF),
+     as well as ice cover age and ridging index (attached to AREA).
+     For now the run time parameters (in data.seaice/SEAICE_PARM03) are
+     SItrName (e.g. 'age') and SItrMate ('HEFF', which is the default, or 'AREA').
+     Up to SItrMaxNum=3 tracers can be used simultaneously.
+ o pkg/salt_plume:
+   -introduce SPsalFRAC run time parameter that sets the fraction of the
+    salt by-product of ice growth (SPsalFRAC*(1-SIsalFRAC)*salt typically)
+    that gets vertically redistributed (fluxed down) by pkg/salt_plume.
+ o model debug options:
+   - Switch reading of debugMode from S/R INI_PARMS (parameter file "data", stored
+     in PARAMS.h) to S/R EESET_PARMS (parameter file "eedata", stored in EEPARAMS.h).
+   - Refine debug-msg printing selection (3 new levels):
+     debugMode  : controls printing of debug messages (sequence of S/R calls).
+     debugLevel : controls printing of algorithm-relevant auxiliary/debug messages
+      debLevZero =  0 ; /* level of disabled aux. msg printing */
+      debLevA =  1 ; /* level of minimum  aux. msg printing */
+      debLevB =  2 ; /* level of low aux. print (report read-file opening)*/
+      debLevC =  3 ; /* level of moderate debug prt (most pkgs debug msg) */
+      debLevD =  4 ; /* level of enhanced debug prt (add DEBUG_STATS prt) */
+      debLevE =  5 ; /* level of extensive debug printing */
+     New debugLevel default: with default debugMode value (=F),
+       = 2 (debLevB) or = 1 (debLevA) in case ALLOW_AUTODIFF is defined.;
+       and if debugMode=T, default debugLevel = 4 (debLevD).
+     Relation with previous settings:
+      debLevB (=2) corresponds to former debLevA (=1)
+      debLevD (=4) corresponds to former debLevB (=2)
+     Note:
+      a) if debugLevel=0, skip WRITE_GRID call when nIter0 > 0 (same as before);
+      b) default debugLevel=1 is convenient in AD runs (avoid many file opening msgs);
+         to recover previous default, set debugLevel=2 (e.g. AD-test hs94.1x64x5)
+   - Add new parameter (printResidualFreq, read from PARM02 namelist) to print
+     detailed CG solvers convergence; off (=0) by default, except if debugLevel=5.
+ o pkg/obcs:
+   - change OBCSfixTopo default from True to False (should not change the results);
+     keep OBCSfixTopo=T in verification-exp. seaice_obcs.
+ o pkg/thsice:
+   - fix bug in thsice_calc_thickn.F (was introduced in version 1.18) in
+nd layer seaice sublimation (unlikely to happen)
+   - use Interior mask for OBCS in thsice_advection.F (similar to what is
+     done in gad_advection & seaice_advection).
+ o adjoint:
+   bug fix spotted by Gael Forget:
+   seaice_advection and thsice_advection still had
+   legacy CPP options to avoid CS corner updates for adjoint
+ o pkg/seaice:
+   => Change some of the defaults (2011/05/29):
+      - change SEAICEuseFluxForm default (from False to True)
+      - change DIFF1 default (from 0.004 m/s to 0. m/s)
+      And print warnings if DIFF1 is not set in data.seaice and centered
+       avection scheme is used without any diffusion.
+   also:
+   - fix seaice_diffusion calls in default AdvScheme part of seaice_advdiff.F;
+   - set SEAICEdiffKh[] default in the same way as SEAICEadvSch[]
+   - stop if DIFF1<>0 with SEAICEadvScheme <> 2, if DIFF1<>0 with any
+     other non-zero SEAICEdiffKh[] diffusivity, if SEAICEadvSalt=T with
+     #undef SEAICE_VARIABLE_SALINITY, if SEAICEadvAge=T with #undef SEAICE_AGE.
+   update results of test exp.:
+      lab_sea: output.fd (switch to AdvScheme=33 with diffKh=20)
+          output.hb87, output_adm.evp (SEAICEuseFluxForm=T and diffKh=200)
+          output_adm.noseaicedyn (SEAICEuseFluxForm=T)
+      offline_exf_seaice: output.seaicetd, output_adm (SEAICEuseFluxForm=T)
+      seaice_obcs: output (SEAICEuseFluxForm=T)
+   and prescribe old default for SEAICEuseFluxForm (=F) and DIFF1 (=0.004)
+       for standard fwd & AD lab_sea tests (to keep the same output).
+ o pkg/seaice/seaice_growth.F:
+   - use Ian Fenty's capping formulas for actual ice
+   thickness thoughout EVOLUTION branch.
+   - put treatment pathological case #2) in CPP brackets
+   (ALLOW_AVOID_INFINITESIMAL_AREA, undef by default).
+   - update global_ocean.cs32x15 and 1D_ocean_ice_colum results accordingly.
+ o pkg/seaice:
+   - seaice_diffusion.F : remove the min(DX,DY) factor permanently;
+   pass the Laplacian diffusivity (in m^2/s) diffKh as a parameter;
+   also pass fac as a param, which can be 1. (to update the tendency
+   field) or the time step (to update the field itself).
+   - seaice_advdiff.F: for multidim, call seaice_diffusion with
+   e.g. SEAICEdiffKhHeff and with fac=1; for single-dim, call
+   seaice_diffusion with e.g. SEAICEdiffKhHeff and with fac=time step.
+   - SEAICE_PARAMS.h, seaice_readparms.F, seaice_check.F :
+   hooks to handle SEAICEdiffKhHeff, SEAICEdiffKhArea, etc.
+ o pkg/seaice:
+   diffusion with centered advection scheme (diffus.F & advect.F):
+   - simplify S/R DIFFUS (put deltaT & DIFF1 factor outside, move EXCH outside)
+     to just compute the laplacian of input-field.
+   - unroll k loop (harmonic,biharmonic diff) in advect.F to save 1 exch call.
+   - fix flux-form version in diffus.F to conserve tracer.
+   update output of lab_sea.fd & lab_sea.hb87 (1rst set of modif affects
+    machine truncation) and lab_sea.salt_plume (conservative flux-form modif)
+ checkpoint62y (2011/05/26)
+ o pkg/seaice:
+  - seaice_growth.F : in EVOLUTION branch, always include
+    a_QSWbyATM_cover in qnet (as it should be).
+  - verification/global_ocean.cs32x15 : update results accordingly
+    (output.seaice.txt output_adm.seaice.txt).
+ o pkg/seaice + obcs:
+  - use maskInW & maskInS in multi-dim advection and biharmonic diffusion:
+    equivalent of assuming no tracer gradient outside the OB region.
+    update output of seaice_obcs (uses DIFF1 <>0 => biharmonic diffusion)
+  - remove calls to OBCS_COPY_TRACER after EXCH calls (no longer needed
+    after changes above);
+  - obcs+seaice cleaning: apply seaice-tracer OB values to tracer field
+    only at OB location (instead of over a band of OLx width).
+ o pkg/seaice:
+  - fix wrong indices in old (non Flux-Form) diffusion default S/R diffus.F
+    (dxG(I+1, ...) changed to dxG(I, ...), no impact on Lat-Lon grid)
+ o pkg/obcs:
+   - split header file "OBCS.h" into 4 separated files:
+     OBCS_PARAMS.h, OBCS_GRID.h, OBCS_FIELDS.h & OBCS_SEAICE.h
+    Note: OBCS_PARAMS.h & OBCS_GRID.h can be included without OBCS_OPTIONS.h
+      (contain no conditional statement which depends on OBCS options).
+   - move "useOBCSYearlyFields" from "data.obcs" (hold in OBCS_PARAMS.h)
+     to parameter file "data.exf", namelist EXF_NML_OBCS (in EXF_PARAM.h).
+ o ctrl, cost, grdchk & autodiff pkgs:
+   - make options file more standard (like other {PKG}_OPTIONS.h file but
+     with AD_CONFIG.h); clean-up some of the included header files.
+ o pkg/obcs:
+   - do not mask tracer when applying OB (tracer == 0 could generate problems)
+   - apply tracer OB values to tracer field only at OB location (instead of
+     over a band of OLx width)
+   - clean-up obcs_apply_w.F & obcs_apply_eta.F (since less calls to these S/R)
+   - remove OBCS_MULTIDIM_OLD_VERSION code in gad_advection.F and remove
+     obcs_apply_tloc.F & obcs_apply_sloc.F
+ o obcs in model/src:
+   - call OBCS_APPLY_W only if NonHydrostatic.
+   - call OBCS_APPLY_ETA only if NonLinFreeSurf.
+   - reset dEtaHdt and wVel to zero outside OB interior region ;
+   - leave tracer unchanged outside OB interior region: This has no effect
+     on the solution but just to prevent unrealistic tracer value outside OB.
+   - zero out velocity outside OB interior region: This has no effect on
+     the solution but just to prevent unrealistic velocity outside OB.
+ o obcs and non-lin free-surf:
+    move call to OBCS_APPLY_R_STAR from update_r_star.F to calc_r_star.F
+    and call to OBCS_APPLY_SURF_DR from update_surf_dr.F to calc_surf_dr.F
+    + add argument "etaFld" to OBCS_APPLY_R_STAR & OBCS_APPLY_SURF_DR:
+    this fixes missing EXCH + get consistent eta OB value (+ fix restart).
+    update results of test-exp. exp4(nlfs).
+ o exp4 (nlfs) test-exp:
+    use OBC for Eta at Western & Eastern OB (to test prescribing Eta
+    with NonLin-FreeSurf); update output.nlfs.txt
+ o obcs and 2d/3d solver norm:
+    use interior masks (maskInC) to cancel out cg2d & cg3d matrix coeff at OB
+    and outside OB interior region (will allow to place OB further inside the
+    domain). Depending on the domain, can affects cg2d-Norm (previous
+    cancellation outside OB was only partial), e.g. in exp4 & obcs_ctrl,
+    and cg3d-Norm (previous Norm was computed before canceling OB terms),
+    e.g. in tutorial_plume_on_slope.
+   - update output of exp.: exp4 (x2), obcs_ctrl and tutorial_plume_on_slope.
+ o pkg rbcs:
+   - split RBCS.h into 3 files: RBCS_SIZE.h, RBCS_PARAMS.h & RBCS_FIELDS.h
+   - add capability to apply relaxation to horizontal velocity uVel & vVel.
+ o pkg/grdchk: add gradient check for control variable xx_shifwflx
+ o pkg/shelfice/shelfice_init_fixed.F
+   fix CPP-flag combinations
+ o pkg/seaice: Merge iceage code of Pierre Rampal
+   * update/change/correct ice age calculations
+   * add age updates for pathological cases
+   Probably needs more testing...
+ checkpoint62x (2011/05/13)
+ o pkg/mom_vecinv:
+    high-order vorticity scheme: use interior masks (maskInW & S)
+    to zero-out (outside OB) gradient of vorticity.
+ o verification exp.:
+    turn on "useEnergyConservingCoriolis" (better discretisation) in exp.
+    hs94.128x64x5 and seaice_obcs ; update results.
+ o pkg/obcs:
+   fix bug in OBeta for YZ sections in obcs_exf_load.F
+ o pkg/ctrl, pkg/shelfice, and optim:
+   - add new control variable xx_shifwflx (fresh water flux underneath ice
+     shelves). This is almost as tedious as obcs-ctrl, because the
+     variables needs its own mask.
+   - add a cost function term that penalizes the deviation of xx_shifwflx
+     from the first guess (zero) in analogy to other control variables
+ o pkg/shelfice:
+   - start basic adjoint
+ o pkg/ctrl:
+   - remove extra 2D field "for good measure" when initializing in
+     ctrl_set_globfld_[xy/xz/yz].F
+   - replace hard coded precision 32 (a bug) in ctrl_map_ini_gen by ctrlprec
+   - improve error messages in ctrl_set_unpack_*
+ o OBC implementation in momentum:
+    use interior masks (maskInC,W & S) in momentum S/R:
+    - multiply divergence, tension and some del^i.u or del^j.v by maskInC
+    - multiply del2u,del2v by maskInW/S (biharmonic viscosity)
+    - multiply horiz. grad of vorticity by maskInW/S (in Leith scheme)
+    - multiply gradient of wVel by maskInW/S in del2w calculation (NonHyd)
+    Motivation: fix/clean implementation of OBC with biharmonic-viscosity
+     (and also with Leith/Smagorinsky harmonic-viscosity).
+    Update output of experiment dome and exp4 (+nlfs).
+ o exp4 test-exp:
+   - turn on: nonHydrostatic, exactConserv, viscA4 (with momDissip_In_AB=F)
+     and prescribe time-varying OB (without pkg/exf) for zonal-velocity
+     at Western & Eastern Boundaries (+/- 1 per-cent); Also prescribe
+     time-varying OB at Western-side for wVel (NonHyd); update output.
+   - add secondary set-up (.nlfs) using NonLin FreeSurf (z*) + mom_vecinv
+     and biharmonic-viscosity ; also use prescribed time varying OB.
+ o pkg/obcs:
+   fix bug in OBWeta,OBWeta indices in obcs_apply_r_star.F
+ o model/src:
+   - fix startTime setting when baseTime<>0 & nIter0=0 are specified ;
+   - initialise startTime & nIter0 with unlikely values: allows to set one
+     from the other without ambiguity.
+ o seaice_obcs test-exp.:
+   add small diffK4T,S to test biharmonic diffusivity with OBCS ; update output.
+ o pkg/obcs:
+   - remove calls to OBCS_COPY_TRACER after EXCH for T,S & pTracer:
+     no longer needed with maskInC,W,S in pkg/generic_advdiff.
+ o pkg/seaice:
+   - retired SEAICE_SALINITY and SEAICE_salinity in favor of
+     SEAICE_VARIABLE_SALINITY and SIsalFRAC, respectively.
+   - fixed bug in the initialization of sea ice salinity variable HSALT
+     in seaice_init_varia.F  (removed dependence on ICE2WATR)
+ o fizhi-cs test exp.:
+    switch reference output convention for these 2 non-standard test-exp,
+     from: pgi  6.1-5 on faulks (FC.6, -of linux_ia32_pgf77+authors_fc5)
+       to: ifort 11.1 on baudelaire (FC.13, -of linux_amd64_ifort11)
+    reason: faulks might get retired soon and pkg/fizhi has still Pb with gfortran
+ o model/inc:
+   - change type of PmEpR array (from _RS to _RL) to fix restart (with "-use_r4")
+     of exp. global_ocean.90x40x15 (Suncronous time-stepping + Real-FW + NonLin-FS)
+ o pkg/seaice:
+   - fix calculation of saltFlux and saltPlumeFlux when using SEAICE_SALINITY
+ o verification/lab_sea, 1D_ocean_ice_column, seaice_obcs, global_ocean.cs32x15
+   - updated output*.txt files due to bug fixes in salt, saltPlumeFlux,
+     and initial HSALT
+ checkpoint62w (2011/04/26)
+ o pkg/mom_fluxform:
+   - fix calculation of del2u & del2v (no-slip BC) when using Non-Lin Free-Surf.
+   - use parameter "sideDragFactor" in no-slip BC side-drag part.
+   - update output of exp. global_ocean.90x40x15
+ o pkg/mom_vecinv:
+   mask del2u & del2v (no effect on results, but cleaner & closer to mom_fluxform)
+ o update seaice exp.:
+   use more consistent parameter values (remove "backward compatability only":
+    ICE2WATR, SEAICE_lhSublim, SEAICE_cpAir, SEAICE_rhoAir + set rhoConstFresh)
+   related to thermodynamics seaice. Update output (fwd+AD) of exp.:
+D_ocean_ice_column (x2), lab_sea (x8), ioffline_exf_seaice (x2) & seaice_obcs
+ o update test-exp global_ocean.90x40x15:
+   o use default CD_CODE_OPTIONS file (Adams-Bashforth on CD Mom & Coriolis).
+   o increase Overlap size from 2 to 3 (to allow to test bi-harmonic Visc.)
+   o new pickup-files from a 100.yr run with pkg/down_slope (input.dwnslp params)
+   o turn on zStar & viscA4 in standard set-up (dir input/)
+     and update output files: output.txt & output.dwnslp.txt
+ o new AD-test experiment: obcs_ctrl
+   (From Matt MITgcm_Contrib/SOSE/BoxAdj) to test OBCS as control vector.
+ o pkg/dic:
+   fix two bugs in handling water vapour pressure in carbonate chemistry
+   and air-sea fluxes. Found by Val Bennington and Galen McKinley
+   (add DIC Option = WATERVAP_BUG to recover old results)
+   update output of tutorial_global_oce_biogeo (fwd+AD) & tutorial_dic_adjoffline
+ o adding allowInteriorFreezing option to check for water below freezing point
+   at depth and bring the negative heat anomaly to the surface level
+ o pkgs _fields_load:
+   - extend GET_PERIODIC_INTERVAL to deal with non-periodic case (from pkg/rbcs)
+   - use new S/R GET_PERIODIC_INTERVAL in pkgs:
+     bulk_force, cheapaml, cfc, dic, obcs (+ ctrl/ctrl_get_gen_rec), offline and
+     rbcs to get interpolation weights and time reccord number.
+   - fix multi-threading in aim_fields_load.F
+   - apply EXCH to temp arrays [0,1] after reading in dic_fields_load.F
+ o external_fields_load:
+   new S/R GET_PERIODIC_INTERVAL to calculate which time-record (and linear
+    interpolation weights) to use in a periodic time-series ; do not divide by
+    time-step to convert to integer:
+    - this fixes case where externForcingPeriod is not multiple of time-step
+       (Thanks to Christopher L. Wolfe)
+    - this fixes case where externForcingPeriod is an odd multiple of time-step
+      (was wrong by half of time-step); update results of tutorial_global_oce_in_p.
+   store index of time-record which is currently loaded:
+    - works without any assumption on sequence of calls to EXTERNAL_FIELDS_LOAD ;
+    - needed for the adjoint but not yet used because of extensive recomputations;
+      (to be fixed soon)
+ checkpoint62v (2011/04/02)
+ o verification/1D_ocean_ice_column added to test Ian Fenty's
+   pkg/seaice_growth.F modifications for improving sea ice code differentiability
+ o update output of exp4, internal_wave, seaice_obcs, tutorial_plume_on_slope
+   (new velocity statistics after changing maskInW & maskInS definition)
+ o pkg/generic_advdiff with OBCS:
+   use maksInW & maskInS in advective flux and in biharmonic diffusion calculation:
+   equivalent to assumption of no tracer gradient outside the OB region.
+   This will affect the results if using obcs+biharmonic diffusion.
+   update output_adm.txt of experiment bottom_ctrl_5x5 (not expected since no obc)
+ o pkg/obcs:
+   change definition of maskInW & maskInS: leave OB edges inside (maskIn=1)
+   (e.g., maskInW(OB_Ie)=1 ) so that velocity normal-component at OB is still
+   in Interior region. No impact on solution but affects Velocity monitor stats.
+ o pkg/ptracers (adjoint)
+   New option AUTODIFF_PTRACERS_SPLIT_FILES for writing separate
+   tape file for each tracer
+ o model/inc/src and pkg/autodiff: add parameters that allow to turn
+   of parts of the adjoint code at run time. For now, there are only
+   useKPPinAdMode, useGMrediInAdMode, and useSEAICEinAdMode. These
+   parameters are set in data.pkg.
+   This is the lazy coward's version of doing this, but still useful for
+   debugging. In order to do it right, everything needs to be moved to
+   pkg/autodiff.
+ o pkg/autodiff: fix global_sum_tile_ad.F by resetting adsumPhi at
+   the end; this fixes the adjoint balancing code for open boundaries.
+ o pkg/ctrl:
+   - change behavior of xx_${varname}period to be analogous to exf-conventions:
+     xx_${varname}period =   0.,  means time-independent control part
+     xx_${varname}period = -12., means one-year-periodic monthly control part
+   - introduce helper routine ctrl_init_rec (part of ctrl_init.F) to
+     clean up ctrl_init a little, remove unused variables
+   - ctrl_init: fixed the handling of the start/endrec for obcs-variables
+   - move "call cal_GetMonthsRec" from s/r ctrl_get_gen to s/r ctrl_get_gen_rec
+ checkpoint62u (2011/03/15)
+ o model/src:
+   - for the adjoint, change NonLin-FreeSurf initialisation sequence: fill-in
+     h0Fac from INITIALISE_FIXED and reset hFac to h0Fac in INITIALISE_VARIA ;
+   - in initialise_varia.F (except for ALLOW_DEPTH_CONTROL) remove 2nd call to
+     INI_DEPTHS, INI_MASKS_ETC & INI_LINEAR_PHISURF.
+ o pkg/ctrl/obcs/ecco:
+   - remove obsolete, unused, and partially broken code:
+     ctrl_obcsvol/ctrl_obcsbal/ctrl_volflux and code within
+     ALLOW_CTRL_OBCS_BALANCE
+   - put a stop statement into ecco/cost_obcsvol.F, but also add
+     cost_obcsvol to ecco_ad_diff.list
+ o pkg/ecco: fix counting cost function contributions for obcs (code
+   by Matt M.) and diffkr for diagnostics
+ o pkg/ecco, pkg/ctrl, pkg/grdchk:
+   add cost penalty terms for initial uvel, vvel, eta controls
+   and I/O for prior error files
+ o pkg/mdsio:
+    move mds_check4file.F from eesupp/src to mdsio_check4file.F ; add option
+    (new argument) to check for tiled file in mdsioLocalDir : this fix the
+    restart from pickup_som , pickup_dic (& dic_co2atm) with mdsioLocalDir.
+ o pkg/ctrl:
+  - ctrl_obcsbal.F, ctrl_obcsvol.F: replace last calls of ctrl_getrec by
+    ctrl_get_gen_rec, put a stop statement into ctrl_getrec. Remove
+    unused and superfluous variables
+  - ctrl_get_gen_rec.F: catch the case of xx_genperiod=0.
+ o pkg/ecco
+  - enable adjoint of Stevens OB
+ o pkg/ctrl/ecco/grdchk:
+   - remove global declaration of tmpfldx/yz and tmpfldx/yz2.
+     Fortunately, we do not have any tests for the numerous cpp-flagged
+     option of "obcs as control parameters" so we will never know
+     if this is an improvement (but at least now things compile).
+   - remove an obsolete initialization from ecco_cost_init_barfiles.F
+   - fix some problems within never used ifdefs to make the code compile
+ o pkg/obcs:
+  - Refine Interior mask definition to work with more complex OB (e.g.
+    if OB_Ie < OB_Iw); In case default setting is not sufficient, allows to
+    read in Interior mask from file. Check if Interior mask is consistent
+    with OB list of indices.
+ o pkg/seaice
+  - beginning code for a seaice tracer package,
+    but currently only used for seaice age: SEAICE_AGE
+    SEAICE_num = 4
+    iTracer = 1: area-weighted ice age
+            = 2: volume-weighted ice age
+            = 3, 4: template for one-year vs. multi-year ice
+    data.seaice has new namelist SEAICE_PARM03 for arrays related to
+    SEAICE_num
+ checkpoint62t (2011/03/05)
+ o pkg/obcs:
+  - obcs_apply_uv.F: change to a 2 steps method, first tangential component;
+    then normal component. This ensures that the normal component is set
+    correctly even when it conficts with tangential setting from an other OB.
+    Affects results of test-experiment seaice_obcs: update the output.txt
+ o pkg/obcs:
+  - add code to monitor statistics of dynamical fields at OB.
+  - take OBCS_BALANCE code out of obcs_calc.F into new S/R OBCS_BALANCE_FLOW :
+    - fix to OBCS_BALANCE code (right hFac ; deal with simple OB intersection).
+    - change default: balance the Net inflow through all OB (instead of balancing
+      each OB separately); keep the old method if setting OBC_balanceFacX < 0.
+  - switch on useOBCSbalance in dome experiment: only correct Western OB outflow
+    to match Nortern OB inflow (OBCS_balanceFacN=0).
+ o pkg/seaice:
+  - redefined actual sea ice age to be ICEAGE/HEFF ifdef SEAICE_AGE_VOL
+ o pkg/seaice (seaice_growth v 1.113):
+  - reverting seaice_growth to v 1.111 in order to have code with exact bit
+    compatibility with MITgcm_contrib/ifenty/Fenty_seaice_thermo_code_merge
+    CPP option SEAICE_OCN_MELT_ACT_ON_AREA removed in v 1.112 is reintroduced
+    runtime flag SEAICEareaFormula is kept but is inactive
+ o model/src:
+  - add new param to scale curvilinear grid distance and area when using
+    a different sphere radius from the grid-files.
+  - test/check multi-threads EXCH applied to local variable (cg2d_x)
+ o adjoint:
+  - enable adjoint of Stevens OB
+  - add dummy_in_dynamics to enable extraction of ADJrhoinsitu
+    (a bit delicate because of potentially modified adj. common block structure;
+    current switch is ALLOW_AUTODIFF_MONITOR_DIAG, could be changed later)
+ checkpoint62s (2011/02/15)
+ o pkg/seaice (seaice_growth v 1.112):
+  - introduce SEAICEareaFormula run time parameter, which selects the recipe for
+    computing the ice cover tendency from effective thickness tendencies. Include
+    Ian Fenty's formula.
+  - remove 'undef SEAICE_OCN_MELT_ACT_ON_AREA' which may now be achieved using
+    SEAICEareaFormula.
+  - simplify notations for the various d_HEFF/d_AREA terms.
+ o pkg/gmredi:
+  - add Boundary-Value-Problem bolus transport (Ferrari etal, OM 2010) code
+    from Christopher Wolfe (UCSD); add partial cell factor in vertical derivative;
+    add a verification test-run (front_relax.bvp) to test GM_useBVP.
+ o pkg/seaice (seaice_growth v 1.111):
+  - for SEAICE_DO_OPEN_WATER_GROWTH, replace Gael's implementation with Ian's.
+  - the new SEAICE_DO_OPEN_WATER_MELT allows open-water air-sea heat fluxes to
+    also melt ice.
+ o pkg/seaice:
+  - McPhee formula for Ice-Ocean fluxes (provided by Ian Fenty).
+  - can be used by #define MCPHEE_OCEAN_ICE_HEAT_FLUX in SEAICE_OPTIONS.h
+ o pkg/cheapaml:
+  - from Nico Wienders: New version of this package.
+ o pkg/flt:
+  - add CPP options to prevent floats to re-enter the opposite side of
+    a periodic domain (default: keep periodicity)
+ o pkg/gmredi:
+  - apply exchange to GM_PsiX,GM_PsiY to get valid values near CS-corners
+    (needed for multi-dim advection).
+  - switch on GM Advective form in global_ocean.cs32x15 and update output.txt
+ o model/src:
+  - fix wrong re-setting of addMass array (ALLOW_ADDFLUID) for atmospheric run.
+ o tutorial_tracer_adjsens
+  - extend to NLFS and replace maskC by hFacC
+    (change reference output accordingly)
+ checkpoint62r (2011/01/24)
+ o testreport:
+  - add option -deloutp (-do) to remove output file after successful run
+  - add option -mfile (-mf) for MPI machile-file and for each test-exp,
+    extract exact list of procs from this file ; adjust COMMAND by
+    replacing TR_MFILE & TR_NPROC with local machile-file & Nb of MPI procs.
+ o pkg/ecco: replace old ineffective way of penalizing deviations from
+   first guess (of obcs) with code by Matt Mazloff
+ o pkg/ctrl: add code that allows the use of ALLOW_OBCS?_CONTROL without
+   exf/cal
+   - ctrl_init: fix initialisation (computation of diffrec) for obcs-ctrl
+     and handle case of obcs?period == 0
+     Not affected by these changes: There is still an inconsistency in
+     the computation of start/endrec for the obcs variables for ALLOW_CAL
+     defined (see comment by Menemenlis, 7-Mar-2003)
+   - make S/R ctrl_get_gen_rec return something meaningful even if
+     ALLOW_CAL is not defined
+   - ctrl_getobcs?: simplify code so that it does not need to use
+                    S/R exf_swapfields
+ o testreport:
+    allow to test MPI with different number of processors for each experiment:
+    create file "SIZE.h.mpi" in each build dir.
+    Note: update of "-command" argument not yet implemented.
+ o model/src, pkg/autodiff, pkg/ecco, pkg/seaice:
+   alleviate the need for additional 3D tapes when using
+   the non-inear free surface in the adjoint. This is done
+   by adding an 'update' of hfacc etc. to their current
+   value at the beginning of forward_step.F.
+ o pkg/seaice
+   seaice_lsr: move stress-divergence computations out of outer pseudo-
+   timestepping loop
+ o pkg/obcs/obcs_prescribe_read.F: move 'CALL OBCS_EXTERNAL_FIELDS_LOAD'
+   up, so that the calls of the ctrl_* subroutines are really at the end
+   of the routine.
+ o pkg/gmredi:
+   allow to specify a 2-D horizontal map and a 1-D vertical profil
+   as scaling factor for Isopycnal diffusivity (Redi) and GM diffusivity.
+ o pkg/seaice:
+   move lsr iterations from seaice_dynsolver to seaice_lsr.
+ o pkg/seaice:
+   reduce memory footprint of seaice mutldim advection tapes,
+   by using a 2D tape independent of the generic_advdiff ones,
+   and setting GAD_AREA=1 etc. rather than GAD_AREA=101 etc.
+ checkpoint62q (2010/12/29)
+ o model/src:
+   - check horizontal grid-spacing for unset or zero/negative values.
+   - change AD test hs94.1x64x5 to be truly a 2-D set-up.
+ o pkg/flt:
+   - use (recent) mdsio S/R MDS_READVEC_LOC instead of local FLT_MDSREADVECTOR
+   - precision of input and output files set according to readBinaryPrec
+     and writeBinaryPrec (previously always 64.b), pickup remains at 64 bits.
+   - initial float position from tiled file was not converted to index space
+     (looks like a bug): fixed to make it similar to initial pos. global file.
+ o global_ocean.cs32x15:
+    change SIZE.h of AD set-up to get same tiling as with MPI.
+    Update output_adm, output_adm.thsice (pass@14) & output_adm.seaice (fail@11)
+ o model/src:
+    add flag to control printing of domain fields (bathymetry, hFac ...) in
+    ini_mask_etc (call to plot_fieds_xy*).
+ o pkg/thsice:
+    if useEXF, some forcing fields are not valid in overlap: fixed by computing
+    over the interior only + apply EXCH at the end (like with SEAICE advection).
+ o pkg/mdsio:
+   - add 2 arguments to S/R MDS_PASS_R4/8toRL/S for overlap size of buffer
+     to copy to/from, so that it can be used to replace MDS_PASS_WH_R8toRL/RS.
+   - change barrier call for safe multi-threads access to 3-D shared buffer.
+   - MDS_READ/WRITEVEC_LOC use buffers from MDSIO_BUFF_3D.h (instead of local ones)
+   - replace call to MDS_PASS_WH_R4/8toRL with call to MDS_PASS_R4/8toRL and
+     remove the 4 S/R MDS_PASS_WH_R4/8toRL/S.
+ o pkg/flt:
+   - add fourth-order Runge-Kutta integration
+   - add basic exch2 support (only 1 facet supported so far!)
+ o pkg/mdsio+rw:
+   new S/R to read local (or tile independent) vector (read counterpart of
+    mds_writevec_loc, and front-end write_glvec_rl/rs).
+ o global_ocean.cs32x15: additional input_ad.seaice experiment
+     that uses pkg/seaice rather than pkg/thsice.
+     (using multidim advection for seaice)
+ o towards more F95 syntax for array specification in namelist:
+   - change "data.diagnostics" (data.ptracers was changed before checkpoint62p)
+     of all verification experiments.
+        e.g.:    line: fields(1,3)='ETAN    ','ETANSQ  ',
+       was changed to: fields(1:2,3)='ETAN    ','ETANSQ  ',
+   - finish adding "-DNML_EXTENDED_F77" to DEFINES list in pgf77 and g77 optfiles
+ o global_ocean.cs32x15: additional input.seaice experiment
+     that uses pkg/seaice rather than pkg/thsice.
+ checkpoint62p (2010/12/17)
+ o pkg/thsice: rename (ad tape index) iicekey as ticekey, and move it
+     to THSICE_SIZE.h to avoid conflict with pkg/seaice.
+ o pkg/seaice: add seaice_diffusion.f seaice_map_thsice.f to adjoint.
+     allow for use of multim. advection in seaice adjoint.
+ o pkg/seaice: add diagnostics for snow precipitation and sublimation flux
+   - first attempt to close budgets by taking into account the freshwater
+     flux implied by the sublimation of snow and ice. So far only the
+     volume budget is closed, turn on with soon-to-be-retired-again CPP-Flag
+     SEAICE_ADD_SUBLIMATION_TO_FWBUDGET
+ o eesupp/src:
+   new S/R with new option (NML_EXTENDED_F77) to change array specification
+   from F95 standard to commonly accepted extended F77 form.
+   This would allow to use F95 syntax in namelist (needed with gfortran 4.4.5)
+   and to revert back to the original syntax (with -DNML_EXTENDED_F77)
+   for less tolerant f77 compiler (e.g., pgf77, g77).
+ o globalFiles:
+   commented out in parameter file "data" since it's not safe with MPI
+   (e.g., wrong on aces); keep it if useSingleCpuIO=T (but not doing much
+   in this case); no longer commented out in restart test (tst_2+2).
+ o add adTapeDir to specify a special directory where adjoint tapes are
+   written/read (adread_adwrite.F). adTapeDir is specified in data/PARM05
+   and cannot be used together with mdsioLocalDir.
+ o nesting pkgs:
+   - packages_init_variables : put call to OBCS_INIT_VARIABLES in last position
+   - update Gianmaria's Nesting pkgs (from Contrib/nesting_sannino)
+   - add parameter files + utils dir + output from short run on beagle.
+ o pkg/seaice:
+     fix seaice_growth.F store directives; update results of exp. lab_sea.ad
+ o pkg/seaice: explicitly store tsurfloc in seaice_solve4temp.F to avoid
+   unnecessary copying in adjoint code, requires new parameter NMAX_ITER
+ checkpoint62o (2010/11/25)
+ o pkg/exf:
+   - change CPP option EXF_VERBOSE to run-time logical param exf_verbose.
+ o pkg/seaice:
+   - seaice_ocean_stress: split a loop for better vectorization of the
+     adjoint code
+   - seaice_growth.F: fix bug in conservation of freshwater connected to
+     capping of heff, put contribution into d_HEFFbyNEG
+   - replace irritating parameters SEAICE_latentWater/Ice and SEAICE_sensHeat
+     by something more sensible (parameters that are what their name implies)
+   - change some defaults, so that by default exf-parameters are used for
+     things like rhoAir, cpAir,latent/sensible heat parameters, in order
+     to reproduce the old results, many data.seaice now contain funny values
+     for cpAir and latent heat of sublimation
+ o packages_readparms.F: move exf_readparms up in line so that
+     exf-parameters are visible for other packages (e.g. seaice)
+ o debugMode & debugLevel=2:
+   - differentiate between debugMode & debugLevel=2:
+     debugMode: controls printing of debug messages (sequence of S/R calls).
+     debugLevel: controls printing of algorithm intermediate results and stats.
+   - remove "if debugLevel=2 => debugMode" but keep "debugMode =>  debugLevel=2";
+     => allows to print debug-stats without all sequence of call messages.
+   - switch control of debug print from debugLevel to debugMode in many S/R.
+ o pkg/obcs (obcs-sponge):
+     fix bug that was introduced on Oct 25 (in dynamics.F v1.151): put back the
+     call to OBCS_PRESCRIBE_EXCHANGES (need to exch gU,gV when using obcs-sponge)
+ o pkg/generic_advdiff:
+   - record overlap minimum size for each advection scheme;
+   - refine criteria on overlap minimum size;
+   - check and stop (in gad_check) if overlap size is too small.
+ o pkg/obcs:
+   - with ptracers: remove multiple calls to obcs_apply_ptracer (only done
+     once, in ptracers_implicit.F)
+   - with seaice: remove test on empty file name in obcs_apply_seaice (always
+     apply OB values when tile has OB)
+ o model/src, coriolis setting:
+   - integer parameter "selectCoriMap" (=0,1,2) replaces 3 logical
+     useConstantF, useBetaPlaneF, useSphereF ; can now read coriolis from
+     files (selectCoriMap=3) with any grid.
+   - add parameter "fPrime" for constant second Coriolis coeff (default=0).
+ o pkg/seaice/seaice_growth.F:
+     a few cosmetic changes that reduce the number of lines of code
+ o pkg/obcs: add boundary conditions following Stevens (1990)
+   - the code follows old MOM/NAOSIM code
+   - so far it is only implemented for the eastern and western boundaries
+     and NOT for pTracers
+ o pkg/rbcs:
+   - replace rbcsInIter by rbcsForcingOffset, the time in seconds at the
+     beginning of the first rbcs forcing period.
+   - add option rbcsSingleTimeFiles that makes rbcs read forcing data like the
+     offline package, i.e., one file per time, labeled by iteration number;
+     deltaTrbcs sets the timestep with which the data was generated;
+     rbcsIter0 is the forcing iteration corresponding to rbcsForcingOffset.
+   - rbcsForcingCycle=0 makes forcing non-cyclic.
+   - make arithmetic safe for negative times and odd forcing periods.
+ checkpoint62n (2010/11/09)
+ o pkg/seaice:
+     fix masking in free-drift S/R ; update results of exp. lab_sea.fd
+ o pkg/obcs:
+    New S/R to copy tracer value from the OB location to narrow band region
+     (width = same as overlap) beyond the OB: preserve OB value (needed for
+     high-order scheme) which were overwritten by EXCH call if in overlap
+     region. Applied to theta, salt, ptracer and advected seaice variables.
+    With seaice: use maskInC in similar way as in gad_advection.F,
+     in seaice_advection.F and advect.F.
+    Update output of experiment seaice_obcs and change exp4 to test OBCS with
+th order Adv.Scheme. for pasive salt and ptracer.
+ o tools/genmake2:
+   - when looking for an optfile (not specified), only search for Fortran compiler
+     (remove sym-link test + setting of CPP + makedepend check + C-compiler check)
+   - in get_fortran_c_namemangling: use "$CC $CFLAG" to compile C test programm
+     (instead of "$MAKE genmake_test.o" since an existing Makefile can be wrong)
+   - set default for CPP to "cpp -traditional -P" (was the case without specifying
+     an optfile, but otherwise default was just "cpp".
+   - comment out PLATFORM=$p_PLATFORM (no idea where p_PLATFORM comes from)
+   - when "CC" is not set in the optfile, look for possible C compiler
+     (instead of just setting CC=cc)
+   - put back version v.169 modif (from 2008/02/15), was dropped in v.173 changes:
+     => add a ".F" to ".o" rule for source files with no "#include" (such as
+        port_rand.F); otherwise, default ignores FOPTIM and just uses FFLAGS.
+   - move gfortran before g77 in list of possible Fortran compiler (consistent
+     with reference compiler switch from g77 to gfortran)
+ o pkg/seaice:
+   o remove SEAICE_OLD_AND_BAD_DISCRETIZATION-code, add a test to
+     seaice_check that stops the model, when the CPP flag is used.
+   o seaice_growth.F: make capping of ice volume conserving by returning the
+     capped ice as freshwater to EmPmR. This does not change the verification
+     experiments but will change runs where the capping is acutally active
+ o change reference platform+compiler from faulks+g77 to baudelaire+gfortran
+   (except the 2 fizhi test exp.); update output of exp.: bottom_ctrl_5x5,
+      global_ocean.cs32x15 (icedyn, thsice, AD thsice), global_ocean_ebm (AD),
+      lab_sea (fd, hb87, salt_plume), MLAdjust (3/5) and vermix (dd)
+ o tools/genmake2:
+   - merge genmake_warnings & genmake_errors into 1 log file: "genmake.log")
+   - change DUMPSTATE default to false (can use "-ds" option to switch it to T)
+   - clean previous genmake log files before anything else.
+   - change Makefile to remove testreport log files (*.tr_log) and genmake log
+     files only with "CLEAN" target (instead of "Clean");
+ o pkg/generic_advdiff:
+   Change OBCS in multiDim advection (gad_advection.F):
+    Use maskInC to prevent intermediate update of tracer-field in OB regions,
+    thus keeping current-time-step OB values; and remove the call to OBCS_APPLY
+    which were applying future time-step OB values.
+   This way, all explicit calculations use current-time-step OB values
+    (simpler and more consistent).
+   Affects results when set-up uses time-varying OBC and multi-dim advection;
+    update output of experiment seaice_obcs.
+ o pkg/seaice:
+   move OPTIONS (formerly locally defined) to SEAICE_OPTIONS.h:
+    this includes SEAICE_GROWTH_LEGACY (+ SEAICE_DO_OPEN_WATER_GROWTH &
+      SEAICE_OCN_MELT_ACT_ON_AREA ) and SEAICE_SOLVE4TEMP_LEGACY.
+   Default (pkg/seaice/SEAICE_OPTIONS.h) is to define SEAICE_SOLVE4TEMP_LEGACY
+    but leave SEAICE_GROWTH_LEGACY undef ; For now, keep verification exp
+    unchanged (SEAICE_GROWTH_LEGACY defined in */code*/SEAICE_OPTIONS.h)
+ o pkg aim (2010/10/26):
+   - Introduce ALLOW_INSOLATION, moving toward a more general incoming solar radiation
+     formulation with obliquity, eccentricity, ... as run-time parameters,
+   - Introduce diagnostics for top-of-the-atmaophere incoming solar radiation and
+     upward shortwave radition at the surface (all-sky and clear-sky).
+ o pkg/obcs:
+   - writing sections with globalFiles=T does not work: switch to tiled-files
+     when writing sections for OBCS (change pkg/rw/write_rec.F accordingly).
+   - fix index bug (OB_Ie -> OB_Iw_) in obcs_apply_uvice.F
+   - apply OBCS_SEAICE_COMPUTE_UVICE to both uice and vice at all obcs
+ checkpoint62m (2010/10/21)
+ o pkg/seaice: vectorize seaice_solve4temp.F
+   - move iterations loops outside of i/j-loops
+   - requires 2D arrays for TB and effConduct
+   - add 2D iceOrNot to replace HICE_ACTUAL.GT.0, as HICE_ACTUAL is
+     modified in this routine
+   - a little bit of clean up, adjusting indentation, etc.
+   - replaced a few TEN**a by exp(a*log(10.)) in new code for better
+     performance and '**TWO' by '**2' (because TWO is a float),
+     replaced ONE, ZERO
+ o eesupp/src:
+    fix flow dir for exch1_z_RX_cube, exch1_uv_RX_cube & exch1_bg_RX_cube
+ o pkg/seaice/seaice_growth.F
+   Revision 1.89 of seaice_growth.F completes the overall october 2010 revision and
+   merging process. The merged routine has two branches, and one activates the 'evolution'
+   branch by setting SEAICE_GROWTH_LEGACY to undef (at the top of the routine for now).
+   In summary, here is what the '10/10 revision' did consist of
+     part 1: seaice_growth.F revisions 1.71 to 1.75
+       - Preliminary seaice_growth.F clean-up, keeping test results strictly unchanged.
+         The emphasis here was on improving readability (e.g. by trying to use meaningful
+         variable names) and modularity (e.g. by adding arrays to store heff etc. updates).
+     part 1.5:
+       - revising the lab_sea experiment to make it a more useful (i.e. stable
+         and representative of an actual model run). This was done by generating a
+         (winter) pickup to start from, switching back the main experiment dynamic
+         solver from evp to lsr, having one of the experiments use the free drift solution.
+     part 2: seaice_growth.F revisions 1.76 to 1.85
+       - Sorting out hard-coded constants that prevented heat and fresh water conservation.
+       - Sorting out the various fields units and sign (set early on and reset at the end)
+         to avoid numerous scalings/re-scalings. By v1.85 the basic unit for ice, heat and
+         fresh water stock is 'effective ice meters', and >0 implies more ice/snow.
+       - Using tendency terms arrays (d_HEFF* etc.) to alleviate remaining code locks,
+         and simplifying logical expressions to further improve readibility.
+     part 3: seaice_growth.F revisions 1.86 to 1.89
+       - Re-organize the blocks of code more logically.
+       - Merging the '_if.F' pieces that add something new.
+ o pkg/thsice:
+   - vectorize thsice_solve4temp and thsice_get_exf.
      Problem: thsice_solve4temp has an unvectorizable statement that
      might also be problematic for TAF
    - thsice_get_exf: add the ALLOW_BULK_LARGEYEAGER04 CPP-flag. This
      does not change the verifcation experiment, but will change all
      experiments that have this flag undefined (not tested in verification);
      a little reorganization to save a few 2D fields and recomputations
+   - 1st step of revisiting thsice adjoint (major recomp. sorted out)
+   - 2nd step:  fix some store dirs
+     o seems to work somewhat, i.e. using ifort but not g77
+     o likely cause are incomplete init. or recomputation
+     o start verification/global_ocean.cs32x15/input_ad.thsice
  o pkg/obcs: add support for exch2
    - the position of the boundary and prescribed values are specified using
      a global domain with exch2 facets stacked
-Line 30 
 o pkg/thsice:
+Line 1471 
 o pkg/thsice:
     iteration loop and call to S/R THSICE_GET_BULKF & THSICE_GET_EXF.
  o verification/lab_sea:
    - overhaul of the forward model experiments. The main motivation
      for this revision is that lab_sea has proven quite fragile (when
      changing the sea-ice code, and switching platforms) to a point
      when failures were very hard to attribute to specific code problems.
    - the suspected reason for this fragility is noise amplification by evp so,
      to start with, we decided to replace evp with lsr in the main experiment.
    - the input.lsr experiment thus became obsolete and was removed.
    - it was replaced with the input.fd experiment that uses an
      analytical "free drift" solution as the ice velocity field.
    - Taken together, input (lsr), input.fd (free drift) and input.hb87 (evp)
      will hopefully allow us to discriminate problems due to dynamic solvers
      from problems due to the thermodynamic code. input.salt_plume (lsr) allows
      us to test additional options, along with the salt plume package.
    - Finally a pickup was generated (at the end of a one year run) to
      make the tests more representative of an actual model run. Previously
      the tests starting point was a 1m thickness of ice everywhere.
  o pkg/seaice:
    - introducing S\R seaice_freedrift.F that compute the
      analytical solution to an approximate ice momentum
      equation (i.e. the simple stress/coriolis balance).
    - define SEAICE_ALLOW_FREEDRIFT to trigger the computation
      of the free drift velocity field, and enable its use.
      To actually use the free drift solution as the model ice
      velocity field set SEAICEuseFREEDRIFT to .TRUE. in data.seaice.
  o move "useOASIS" from PARAMS.h to EEPARAMS.h and read it from "eedata"
  checkpoint62l (2010/10/04)
-Line 373 
 o tools/build_options:
+Line 1814 
 o tools/build_options:
      but keep the former optfile for few weeks for smooth transition
  o pkg/ecco
    - allow user defined cost function contributions
-         CPP: ALLOW_USERCOST_CONTRIBUTION
+      CPP: ALLOW_USERCOST_CONTRIBUTION
-         USAGE: compute contributions in cost_usercost_all.F
+      USAGE: compute contributions in cost_usercost_all.F
    - note: this is identical to what ALLOW_GENCOST_CONTRIBUTION once was.
        the two options are complementary.
  o pkg/smooth

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