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-revision 1.2005 by jmc,
Fri Jun  6 21:17:12 2014 UTC
+revision 1.2112 by mlosch,
Mon Jan 12 16:07:33 2015 UTC
 Line 4 
 $Name$
      Notes on tags used in MITgcmUV
      ==============================
+ o pkg/obcs: re-organize obcs_calc_stevens.F to prepare for passive tracers
+ o pkg/seaice: two new runtime parameters:
+   - SEAICE_cStar replaces the hard wired "20" in the strength formulation,
+     long overdue
+   - SEAICE_tensilFac: preparation for Koenig-Beatty+Holland (2012)
+     parameterization of tensil stress for fast ice (does not do anything yet)
+ o pkg/seaice/seaice_check.F: left over from restricted addtive Schwarz method
+   for LSR: move checking overlaps out of JFNK-if-block
+ o pkg/atm_phys:
+   - move copy of grid and dynamical fields out of atm_phys_driver.F into
+     new S/R ATM_PHYS_DYN2PHYS.
+   - fix level height for Linear Free-Surf case (to be consistent with
+     fixed-in-time pressure levels).
+ o pkg/mom_common (bottomdrag):
+   - average bottomDragFld (ALLOW_BOTTOMDRAG_CONTROL) from grid-cell center
+     to correct location (U & V point) in S/R MOM_U/V_BOTTOMDRAG;
+     update output (adm & tlm) of experiment global_ocean.90x40x15.bottomdrag.
+ o pkg/shelfice (u/v_drag):
+   - add one argument (the other velocity component) to S/R SHELFICE_U/V_DRAG;
+   - use SHELFICEDragLinear & SHELFICEDragQuadratic in shelfice_v_drag.F
+     (now similar to shelfice_u_drag.F)
+   - remove condition on bottomDragTerms when calling SHELFICE_U/V_DRAG
+     from mom_vecinv.F (similar to mom_fluxform calls).
+ o pkg/mom_common (bottomdrag):
+   - add one argument (the other velocity component) to S/R MOM_U/V_BOTTOMDRAG;
+   - add options for alternative discretisation of velocity norm in quadratic
+     bottom drag: averaging of grid-cell-center KE to U.point and V.point
+     (selectBotDragQuadr=0, original code) can produce noisy patterns; this
+     improves when averaging only the other component (e.g. vVel for U bottom
+     drag) using wet-point method (selectBotDragQuadr=2) or not (=1).
+   - add options (bottomVisc_pCell) to account for partial-cell in bottom
+     friction (no-slip BC) thus getting the true distance from the bottom;
+     off by default since this also reduces model stability (explicit bottom
+     friction). Changes produce different machine truncation with linear-drag
+     + no-slip BC: update output of experiments exp4.stevens (10 digits) and
+     front_relax (bvp & mxl, 10 & 11 digits).
+ o model/src & mom pkgs:
+   - add one more level to vertical viscosity local arrays (Nr+1, previously Nr)
+     since no-slip bottom BC uses viscosity @ k+1 to update velocity @ level k
+   - for now and until vertical mixing scheme are updated to fill up level Nr+1,
+     just copy level Nr value to level Nr+1.
+ o doc:
+   - add notes form Abhisek Chakraborty on how to close Heat & Salt budgets.
+ o pkg/streamice:
+   - shelfice_init_varia.F, shelfice_init_fixed.F, shelfice_readparms.F,
+     SHELFICE.h: move array shelficemass to init_varia, initialise
+     from array shelficemassinit, which is set in init_fixed and
+     has option to be set from file; introduce array
+     shelficeMassDynTend array, set thru file in init_fixed
+   - NEW FILE: shelfice_step_icemass.F: update shelficemass from either
+     shelfIceFreshWaterFlux and shelficeMassDynTend or H_streamice in
+     pkg/streamice
+   - shelfice_thermodynamics.F: call shelfice_step_icemass if
+     SHELFICEMassStepping = .true.
+   - shelfice_ad_diff.list: add new subroutine shelfice_step_icemass.f
+ checkpoint65h (2014/12/17)
+ o verification/global_ocean.90x40x15, global_ocean_ebm:
+   - update to generic controls.
+ o pkg/ctrl:
+   - ctrl_map_ini_genarr.F: test for igen>0
+   - ctrl_init_variables.F: add call to CTRL_MAP_INI_GENTIM2D.
+   - move gentim2d part of ctrl_map_ini_genarr.F to
+     new separate routine : ctrl_map_ini_gentim2d.F
+   - ctrl_cost_driver.F,ctrl_init.F ctrl_map_ini_genarr.F:
+     add time variable weights and cyclic controls (time mean,
+     seasonal cycle, etc) capabilities to gentim2d
+ o pkg/ecco:
+   - move reading of error, conversion to weights from
+     ecco_cost_init_fixed.F to ecco_toolbox.F (ecco_readwei)
+ o global_oce_llc90, cs32:
+   - activte sbo.
+   - CTRL_SIZE.h : add maxCtrlProc.
+   - activate the new genctrl capabilities.
+   - update following reorganization of global_oce_input_fields.tar.gz
+ o pkg/ctrl/ctrl_ad_diff.list:
+   - add missing ctrl_init_rec.f
+ o tools/OAD_support/keepOriginal:
+   - add ctrl_init_rec.F
+ o model/src/the_main_loop.F, pkg/ctrl/ctrl_map_ini_genarr.F:
+   - avoid recomputations of xx_gentim2d_dummy.
+ o momentum diagnostics:
+   - move filling of diagnostics Um_Diss & Vm_Diss from mom_fluxform.F and
+     mom_vecinv.F to timestep.F (to include Smag-3D contribution).
+ o pkg/seaice/seaice_lsr.F:
+   - fix computation of BU/BV, make sure they are non-zero, only necessary
+     for cubed sphere exchanges and SEAICE_OLx/y>0.
+     This makes calling s/r fill_cs_corner_rl obsolete (removed).
+ o verification/global_ocean.cs32x15/input.seaice
+   - add test for strong implicit coupling and restricted addtive Schwarz
+     methods for LSR
+   - update results/output.seaice.txt
+ o verification/tutorial_global_oce_biogeo:
+   - AD & OAD set-up: switch off ALLOW_OLD_VIRTUALFLUX (like in fwd set-up)
+     and set PTRACERS_EvPrRn(1,2) to zero (for DIC & ALK);
+     update output_adm,_oadm,_tlm.txt
+ o pkg/dic:
+   - change default to "#undef ALLOW_OLD_VIRTUALFLUX" in DIC_OPTIONS.h
+   - add a stop when ALLOW_OLD_VIRTUALFLUX is defined and PTRACERS_EvPrRn
+     for tracer 1 & 2 is set (to avoid double counting of dilution effect).
+ o verification/tutorial_global_oce_biogeo:
+   - AD & OAD set-up: do not set PTRACERS_EvPrRn for tracer 1 & 2 since
+     dilution is already added by pkg/dic ALLOW_OLD_VIRTUALFLUX ;
+     update output_adm,_oadm,_tlm.txt
+ o eesupp/src:
+   - add fill_cs_corner_rl.F (_RL-copy of fill_cs_corner_rs.F)
+     and call it in seaice_lsr when using nonzero SEAICE_OLx/y
+ o pkg/seaice: introduce strongly implicit coupling, intended for stabilizing
+   LSR (following Hutchings et al. 2004)
+   - introduce zetaZ as a global variable (requires adjustments in
+     seaice_evp.F and seaice_jfnk.F) and compute analoguously to etaZ
+     in seaice_calc_viscosities.F
+   - new flag SEAICEuseStrImpCpl (default off)
+   - add new terms zetaZ*du/dy and zetaZ*dv/dx on both sides of the
+     momentum equations
+   - JFNK-solver (preconditioner) adjusted to allow using this method
+     (where it does not have any positive effect)
+ o pkg/seaice
+   - add overlap for restrictive additive Schwartz method also to LSR, but
+     turn it off by default (because it only seems to work for non-cubed
+     sphere/llc topologies)
+ o pkg/autodiff
+   - add extra exchanges in addummy_in_steppging also for mnc output
+ o pkg/seaice:
+   - add extra exchanges before dumping adjoint fields in seaice_ad_dump.F
+     to avoid stripes in the adjoint output (similar to addummy_in_stepping.F)
+ o pkg/obcs:
+   - add option to specify domain-connected piece Id along OB though files
+     (for now, only used to diagnose PhiVel; default =1 -> global correction)
+   - modify obcs_diag_balance.F to process each connected-part separately;
+     exclude OB where Id = 0 but keep the full divergence there (-> constant
+     Psi along this portion of OB and all inflow derived from grad(Phi))
+   - add example of OB-conect files in verification/so_box_biogeo/input.
+ o pkg/diagnostics:
+   - improve treatment of Open-Boundaries in Velocity-Potential calculation:
+   a) use non zero matrix element across OB and solve for Phi 1 grid point
+      outside OB (i.e, where tracer OBCS are applied).
+   b) global imbalance of inFlow/outFlow across OB: instead of modifying
+      velocity across OB, spread it uniformly along the OB in the RHS.
+ checkpoint65g (2014/11/19)
+ o pkg/diagnostcis:
+   - add preconditioner off-diagonal factor (diagCG_pcOffDFac) as run-time param
+ o pkg/my82,pp81,kl10:
+   - fix ALLOW_3D_DIFFKR implementation (previously had no effect): use 3-D
+     field diffKr as background diffusivity to set minimum diffusivity value.
+ o pkg/seaice:
+   - add new parameter SEAICEuseEVPrev (for revisited EVP by
+     Bouillon et al 2013)
+   - add SEAICE_evpAlpha/Beta to namelist
+   - modify seaice_evp code to able to use SEAICEuseEVPrev. These changes
+     involve trivial re-ordering of divisions/multiplications that should not
+     have any effects, but ... they do change the results of lab_sea.hb87 so
+     that only 2 digits of agreement remain, in line with the general
+     instability/fragility of the evp-code. For now, I do not care and just
+     update the verification experiment
+ o pkg/ctrl : add generic pre-processing (xx_genarr2d_preproc etc)
+   - remove xx_genarr2d_numsmooth etc
+   - use xx_genarr2d_preproc etc instead
+   - carry out smooth_correl2D at initialization stage rather than during
+     time stepping.
+   - get smoothOpNb from xx_gentim2d_preproc
+ o global_oce_cs32 :
+   - add test of generic ecco capabilities.
+ o pkg/exf/exf_getsurfacefluxes.F :
+   - add to tmpUE/tmpVN rather than re-initializing them (conventional behavior).
+ o pkg/ctrl,ecco :
+   - omit un-necessary arguments to ctrl_cost_gen.F unless ECCO_CTRL_DEPRECATED
+     is defined.
+ o pkg/seaice: add diagnostics for Delta (deformation parameter)
+ o model/src:
+   - when ALLOW_3D_DIFFKR is defined, add a Warning if any of the vertical
+     diffusivity (background) is specified but ignored.
+ o verification:
+   - in testreport, convert hostname to lower case for default output dir name
+ o model, pkg : add useCTRL, useECCO parameters (on/off run time switch).
+ o pkg/dic: add modifications from Hajoon:
+   - add iron sedimentation flux function of the flux of PO4 out of bottom layer
+   - light attenuation: add self-shading effect by climatological Chlorophyll
+     (read from file).
+ o pkg/seaice/seaice_preconditioner.F : fix cpp flags, so that code also
+     compiles when SEAICE_ALLOW_DYNAMICS is undefined
+ o global_oce_llc90,cs32 : ecco_v4 verification exps now use separate
+     AUTODIFF_OPTIONS.h, CTRL_OPTIONS.h, ECCO_OPTIONS.h rather than
+     ECCO_CPPOPTIONS.h (i.e. replacing the deprecated, circumvoluted,
+     approach where CPP_OPTIONS.h includes an omnipotent
+     ECCO_CPPOPTIONS.h that superseeds pkgs '_OPTIONS.h').
+ o pkg/ctrl/ctrl_map_ini_genarr.F : include GMREDI_OPTIONS.h where
+     ALLOW_3D_KAPGM, ALLOW_3D_KAPREDI (to be added later) belong.
+ o pkg/seaice/SEAICE_SIZE.h : replace ALLOW_AUTODIFF_TAMC with ALLOW_AUTODIFF
+     to avoid needing AUTODIFF_OPTIONS.h anytime SEAICE_SIZE.h is included
+     (it seems that THSICE_SIZE.h, PTRACERS_SIZE.h have the same issue...)
+ o model/src, pkg/smooth, profiles, salt_plume, seaice, exf, ecco, ctrl :
+   add ECCO_OPTIONS.h, AUTODIFF_OPTIONS.h, CTRL_OPTIONS.h when needed
+   - ECCO_OPTIONS.h is needed when including ecco_cost.h, ecco.h
+   - AUTODIFF_OPTIONS.h is needed when including tamc.h, tamc_keys.h
+   - CTRL_OPTIONS.h is needed when including ctrl.h, optim.h, etc
+ o pkg/ctrl,ecco,exf :
+   - remove variables associated with NON-generic costs,
+     unless ECCO_CTRL_DEPRECATED is defined.
+   - remove NON-generic NON-obcs controls,
+     unless ECCO_CTRL_DEPRECATED is defined.
+ o pkg/ctrl : added ctrl_local_params.h
+ o pkg/ecco : added ecco_local_params.h
+ o verification : added ECCO_CTRL_DEPRECATED to most as and oad
+     experiments, which will progressively be removed once the
+     experiments are revised to use only generic controls/costs.
+ checkpoint65f (2014/10/13)
+ o pkg/ctrl, ecco, seaice : minor changes in headers
+ o global_oce_llc90,cs32 : ecco_v4 verification exps now test generic
+     cost function and control capabilities added since checkpoint65c.
+ o pkg/ctrl: regroup all obcs ctrl variables in CTRL_OBCS.h.
+ o pkg/ecco: increase modularity and improve logic
+   - ecco_toolbox.F (new) : basic operations that are often used,
+     including ecco_zero, ecco_cp, ecco_cprsrl, ecco_diffmsk,
+     ecco_addcost, ecco_add, ecco_div, ecco_readbar.
+   - cost_gencal.F (new) : determine filnames and records.
+   - cost_genread.F, cost_generic.F : condense code using ecco_toolbox.
+   - cost_generic.F : use spzeroloc rather than hard-coded -9999,
+     and exploit the above functions leading to more compact code.
+   - cost_genread.F : rm un-necessary arguments, re-arrange args order.
+   - ecco_check.F, ecco_readparms.F : bring logic up to date (using_tpj,
+     using_ers, using_gfo, using_mdt is now only defined within gencost)
+ o pkg/ecco: extend generic cost capabilities
+   - pkg/ecco : added 3D gencost (ALLOW_GENCOST3D), added gencost
+     capabilities via gencost_preproc (+ _c,_i,_r related params),
+     gencost_posproc (+ _c,_i,_r related params), gencost_nrecperiod,
+     gencost_outputlevel arguments to cost_generic
+   - pkg/ecco/cost_genread.F (new) : interface between cost_generic
+     and active_read, making room for gencost_preproc to take effect.
+     Added preproc code ('climmon') to replace GENERIC_BAR_MONTH.
+   - pkg/ecco/cost_generic.F :
+     compute and store misfit maks*(model-data) in localdif that is
+     then used in cost and for output, output misfit if outlev.GT.0
+   - pkg/ecco/cost_averagesfields.F : depend on gencost_barskip
+     rather gencost_barfile for deciding whether to write barfile
+   - pkg/ecco/ecco_cost_driver.F : extract call to cost_profiles from cost_hyd
+   - pkg/ecco/ecco_cost_init_fixed.F : extract gencost weights from
+     ecco_cost_weights, re-activate ecco_summary, determine gencost_barskip
+   - pkg/ecco/ecco_summary.F : report gencost variables
+   - pkg/ecco/cost_gencost_customize.F : treat case of scatterometer costs
+ o pkg/sea/SEAICE_OPTIONS.h : add ALLOW_COST_ICE, ALLOW_SEAICE_COST_SMR_AREA
+ o pkg/ecco: internal re-organization
+   - resolve un-necessary dependancies within pkg/ecco and to pkg/ctrl
+     (rm includes of optim.h and ctrl.h, replace optimcycle with eccoiter,
+     mv relevant variables definition from ecco_cost.h to ecco.h,
+     make sure gencost routines only include ecco.h)
+   - throughout : add missing CCP switches, rm unused variables,
+     and rm un-necessary CPP switches
+   - throughout gencost routines : replace modelstartdate with
+     gencost_startdate when needed
+   - cost_bp_read.F : use arguments, instead of common blocs
+     so that it can be used also by (new) cost_gencost_bpv4.F
+   - ecco_init_varia.F : initialize RHOsumGlob_0, VOLsumGlob_0
+   - ecco_phys.F : compute etanFull
+   - ecco_readparms.F : rename using_topex as using_tpj, add
+     bpv4-grace to gencost list, initialize added parameters
+   - ecco_summary.F : include SIZE.h needed for augmented ecco.h
+ checkpoint65e (2014/09/28)
+ o pkg/obcs:
+   - replaced the just-added CPP options with run-time variables
+     (see pkg/obcs/OBCS_PARAMS.h for details)
+ o pkg/obcs:
+   - add additional CPP options for sponge boundary layers
+     (see pkg/obcs/OBCS_OPTIONS.h for details)
+ o pkg/atm_phys:
+   - implement simple (obliquity only, assuming circular planet orbit)
+     seasonal cycle for incoming insolation ; used when run-time parameter
+     "select_incSW" is set to 1 ; by default (=0), uses old unchanged formula.
+ o pkg/exf, pkg/ecco, pkg/ctrl:
+   - add ctrlUseGen and .NOT.ctrlUseGen exclusive brackets
+   - activate gentim2d for xx_atemp,xx_aqh,xx_swdown,xx_lwdown,xx_precip
+   - implement gentim2d for xx_tauu, xx_tauv
+ o pkg/ctrl, pkg/ecco :
+   - fix and complement the generic controls implementation
+ o pkg/exf/exf_getclim.F, exf_getffields.F, exf_getsurfacefluxes.F,
+     pkg/shelfice/shelfice_thermodynamics.F,
+     verification/hs94.1x64x5/code_ad/ctrl_map_gentim2d.F,
+     verification/hs94.1x64x5/code_oad/ctrl_map_gentim2d.F :
+   - add weight in CTRL_GET_GEN calls
+ o pkg/ctrl :
+   - ctrl_get_gen.F : add weight as input parameter, and apply
+     it directly rather than using smooth_correl2Dw (to be retired).
+   - ctrl_map_gentim2d.F : add wgentim2d in CTRL_GET_GEN call
+ o pkg/ctrl :
+   - introduce run time switch ctrlUseGen (in ctrl.h, ctrl_check.F,
+     ctrl_init_variables.F, ctrl_readparms.F, ctrl_summary.F)
+   - re-activate ctrl_summary (call in ctrl_init.F)
+ o pkg/ctrl/ctrl_cost_gen.F :
+   - fix CCP brackets, remove un-necessary myiter, mytime
+ o pkg/ecco, pkg/ctrl :
+   - remove cost_genctrl.F (now pkg/ctrl/ctrl_cost_driver.F)
+   - remove cost_forcing_gen.F (now pkg/ctrl/ctrl_cost_gen2d.F)
+   - add ctrl_cost_driver.F (replaces pkg/ecco/cost_genctrl.F)
+   - add ctrl_cost_gen2d.F (replaces pkg/ecco/cost_forcing_gen.F)
+ checkpoint65d (2014/09/15)
+ o pkg/ctrl/CTRL_GENARR.h, ctrl_readparms.F :
+   - add xx_genarr2d_bounds,xx_genarr3d_bounds,
+     xx_genarr2d_numsmooth, xx_genarr3d_numsmooth
+ o pkg/ctrl/ctrl_map_ini_genarr.F :
+   - remove compilation failure
+   - replace hard coded example
+   - use ctrl_map_ini_gen2D, 3D
+ o pkg/ctrl/ctrl_pack.F, ctrl_unpack.F :
+   - on/off switch based upon xx_genarr2d_weight,3d
+ o src/packages_init_variables.F :
+   - regroup pkg/estimation calls
+   - remove CTRL_MAP_INI, CTRL_MAP_INI_ECCO
+     (moved to ctrl_init_variables)
+ o cost/cost_init_varia.F :
+   - remove ecco_cost_init_varia
+     (moved to ecco_init_varia)
+ o ctrl/ctrl_init_variables.F :
+   - add CTRL_MAP_INI, CTRL_MAP_INI_ECCO
+   - add CTRL_MAP_INI_GENARR, SEAICE_CTRL_MAP_INI
+ o ctrl/ctrl_map_ini.F :
+   - remove ctrl_map_ini_genarr, seaice_ctrl_map_ini
+     (moved to ctrl_init_variables)
+ o ctrl/ctrl_map_ini_ecco.F :
+   - remove ECCO_PHYS (mv to ecco_init_varia)
+   - remove seaice_ctrl_map_ini (mv to ctrl_init_variables)
+ o ecco/ecco_ad_diff.list :
+   - add ecco_init_varia.f
+ o ecco/ecco_init_varia.F
+   - new routine
+ o pkg/streamice:
+   - move call to STREAMICE_INITIALIZE_PETSC from the_model_main.F
+     to streamice_init_fixed.F ; fix setting of STREAMICEisOn.
+   - from model/src, only call pkg/streamice routines if useStreamIce is TRUE.
+ o pkg/generic_advdiff:
+   - fix bug causing negatives in GAD_SMOLARKIEWICZ_HACK, introduced 8/8/2014.
+ o pkg/exf:
+   - exf_getffields.F : add xxg_atemp, xxg_aqh, xxg_swdown, xxg_lwdown,
+      xxg_precip capability
+   - exf_wind.F : no need for ALLOW_WSPEED_CONTROL cpp switch
+ o pkg/ctrl:
+   - ctrl_pack.F, ctrl_unpack.F : omit (un)packing of undefined xx_gentim2d
+ o model/src/load_fields_driver.F :
+   - move call to CTRL_MAP_GENTIM2D ahead of BULKF_FIELDS_LOAD, EXF_GETFORCING
+     so xx_gentim2d can be applied to e.g. exf fields in a timely manner.
+ o OpenAD verification experiments:
+   - Include explicitly AUTODIFF_OPTIONS.h, COST_OPTIONS.h, and CTRL_OPTIONS.h
+     in src files (to enable to skip the ECCO_CPPOPTIONS.h);
+     for now, only in pkgs used in OpenAD verification experiments.
+   - Change all except one (halfpipe_streamice) OpenAD experiments to use pkg
+     specific option file (AUTODIFF_OPTIONS.h, COST_OPTIONS.h & CTRL_OPTIONS.h)
+     instead of using ECCO_CPPOPTIONS.h (with all relevant options in it).
+     This applies to both TAF (*/code_ad/) and OpenAD (*/code_oad/) tests.
+ o OpenAD verification tests:
+   - finish removing ALLOW_AUTODIFF_OPENAD (replaced by ALLOW_OPENAD);
+   - finish replacing ALLOW_AUTODIFF_TAMC by ALLOW_AUTODIFF (except for
+     tape/storage which are specific to TAF/TAMC) in pkgs used in OpenAD exp.
+   - leave ALLOW_AUTODIFF_TAMC undef in OpenAD verification tests (*/code_oad/)
+     and remove local copy of "tamc.h" (needed only if ALLOW_AUTODIFF_TAMC).
+ o model/src & generic_advdiff:
+   - change hard-coded loop-range in S/R APPLY_FORCING_T/S to set T & S
+     forcing over 0:sNx+1, 0:sNy=1 (instead of just 1:sNx,1:sNy): Model
+     dynamics requires valid tracer forcing only over tile interior but, for
+     some diagnostics, may need to extend it over 1 point in tile halo region.
+   - in gad_calc_rhs.F, update calls to gmredi_x/ytransport to get valid
+     tendency over i,j_Min,Max range. This allows to simplfy i,j_Min,Max
+     setting in temp/salt/ptracer_integrate.F
+ o pkg/dic:
+   - multiply tracer tendencies by maskInC (if ussing OBCS) before updating
+     gchem tracers: this allows to skip the 2nd call to OBCS_APPLY_PTRACER
+     in gchem_forcing_sep.F
+ o pkg/autodiff & obcs:
+   - add storage of current OB values for U & V (was already done for T & S).
+ checkpoint65c (2014/08/30)
+ o pkg/dic:
+   - take out of dic_atmos.F the initialisation part (corresponding to istate=0)
+     and move it to new S/R DIC_INI_ATMOS ; also simplify the dependencies for
+     AD compilers (but still a Pb with multi-threading and Ajoint dependencies).
+ o verification:
+   - new experiment testing OBCS and DIC pkgs, using params & output from
+     tutorial_global_oce_biogeo but limited to a sub-domain around Drake
+     passage: take OBCS from the last year of a 2 yrs simulation and initial
+     conditions from t=1.yr while keeping the same forcing.
+ o model/src:
+   - when allowFreezing=T, only reset below freezing initial Temp to Tfreezing
+     (at any k) if checkIniTemp is not set to FALSE (default checkIniTemp=T).
+ o pkg/diagnostics (Stats-Diags):
+   - re-write S/R DIAGSTATS_CALC (more similar to TARGET_NEC_SX part) to:
+     a) refine region where stats are computed, excluding where arrhFac=0 ;
+     b) fix missing interior mask (use with OBCS) in 3-D fields statistics;
+     c) extend regional stats over the region edges (for U or V pt location).
+ o pkg/gchem:
+   - add a (2nd) call to OBCS_APPLY_PTRACER in gchem_forcing_sep.F (needed since
+     pkg/dic is currently changing/updating ptracers values beyond the OB).
+ o verification (hs94):
+   - convert Held & Suarez external_forcing.F (from hs94.cs, with Sigma-coords
+     bits) to apply_forcing.F and undef USE_OLD_EXTERNAL_FORCING in experiments
+     hs94.cs-32x32x5 and tutorial_held_suarez_cs ; also use the same version of
+     apply_forcing.F in 2D hs94 (fwd, ad & oad) but keep LatLon hs94 unchanged.
+ o pkg/ptracers:
+   - implement Adams-Bashforth on pTracers (instead of on tracer tendency),
+     switched on by setting PTRACERS_doAB_onGpTr=F (default set to doAB_onGtGs)
+   - change exp4 secondary test (input.nlfs) to test AB on T & S & pTracer
+     with AB-2 code (so that it get tested).
+ o model/src:
+   - allow to apply Adams-Bashforth on Temp & Salt (instead of on gT,gS)
+     with AB-2 code (previously only available with AB-3 code).
+     Also move the code (call to ADAMS_BASHFORTH S/R) form thermodynamics.F
+     to temp/salt_integrate.F (since the 2nd part of gt/sNm1 update is done
+     there, by calling CYCLE_AB_TRACER).
+ o pkg/generic_advdiff:
+   - change Tracer argument (drop bi,bj indices) in S/R GAD_CALC_RHS,
+     GAD_C2_ADV_R, GAD_U3_ADV_R, GAD_C4_ADV_R, GAD_DIFF_R, GAD_BIHARM_R
+     + also in GMREDI_X/Y/RTRANSPORT ; and update corresponding calls in
+     S/R temp/salt/ptracers_integrate.F
+ o model/src & pkg/ptracers:
+   - remove common block variables gT,gS (in DYNVARS.h), except when
+      USE_OLD_EXTERNAL_FORCING is defined; update TAF storage accordingly.
+   - remove common block variable gPtr.
+ o model/src & pkgs:
+   - change gTracer (and/or tracer) argument (drop bi,bj indices) in S/R
+      ADAMS_BASHFORTH(2&3), CYCLE_(AB_)TRACER, FREESURF_RESCALE_G,
+      IMPLDIFF, SOLVE_TRIDIAGONAL & _PENTADIAGONAL, GAD_SOM_ADVECT,
+      GAD_ADVECTION, GAD_CALC_RHS, GAD_IMPLICIT_R, TIMEAVE_CUMUL_DIF_1T
+   + change accordingly all calling S/R.
+   - use local temperature/salinity/ptracer tendency array (without bi,bj)
+     in S/R temp/salt/ptracers_integrate.F
+ o pkg/seaice:
+   - move computation of stress contributions to rhsU/V in s/r seaice_lsr
+     to separate s/r seaice_lsr_rhsu/v in order to be able to re-use code
+   - make u/vIceC local variables if SEAICE_CGRID is defined only to be used
+     in seaice_lsr
+   - seaice_lsr.F: make local 4D arrays UXX, VYY, etc 2D
+     in s/r seaice_lsr_calc_coeffs
+ o pkg/mdsio:
+   - in MDS_READ/WRITE_FIELD, stop if file-name (+prefix) is too long
+     (e.g., > MAX_LEN_MBUF -90 ) or, in INI_MODEL_IO, if mdsioLocalDir is
+     too long (e.g., > MAX_LEN_FNAM/2 )
+ checkpoint65b (2014/08/12)
+ o pkg/matrix:
+   - pass, as argument, updated tracer field to S/R MATRIX_STORE_TENDENCY_EXP
+ o model/src:
+   - fix initialisation of geothermalFile; compile geothermal-flux code in
+     natl_box verification experiment.
+ o model/src & pkg/down_slope:
+   - push the k loop inside S/R TIMESTEP_TRACER (now called outside the k loop).
+   - in dwnslp_apply.F, update tracer tendency instead of the future tracer
+     field and call S/R DWNSLP_APPLY before TIMESTEP_TRACER; this affects
+     results at machine truncation level: update output of experiments
+     global_ocean.90x40x15.dwnslp (FWD) and lab_sea.noseaicedyn (AD).
+ o pkg/diagnostics (Stats-Diags):
+   - do not cumulate the full volume when DIAGNOSTICS_FILL is
+     called with bibjFlg < 0 (no increment of the counter for 2D/3D diag);
+     This fix the mean statistics when DIAGNOSTICS_FILL is called multiple
+     times (but Min,Max and StD are still wrong).
+ o model/src:
+   - add geothermal flux forcing: read in ini_forcing.F as time-constant
+     field "geothermalFlux" applied in S/R APPLY_FORCING_T (apply_forcing.F)
+ o model/src:
+   - move CYCLE_TRACER calls from tracers_correction_step.F to temp/salt/ptracer
+     _integrate.F so that, when leaving S/R THERMODYANMICS, theta,salt and pTrac
+     arrays are already updated while adjustments (filters, conv.adjustment) are
+     still applied later, in S/R TRACERS_CORRECTION_STEP.
+ o model/src:
+   - store in common bloc array "rhoInSitu" the virtual potential temperature
+     anomaly that is used to compute geopotential: this make the atmos code
+     more similar to ocean code which already uses rhoInSitu in calc_phi_hyd.F
+ o pkg/seaice/seaice_lsr.F
+   - rename integer variable ilcall to ipass (that's what it is called
+     in the residual diagnostics
+   - change time stepping for NPSEUDOTIMESTEP > 2 (does not change the
+     default) for improved non-linear convergence of the first few steps
+   - adjust a few comments and add new ones to explain some of the store
+     directives
+ o pkg/generic_advdiff (& ptracers):
+   - re-work the code to check for valid advection scheme and for minimum
+     size of overlap (now stored in local common bloc in gad_advscheme.F)
+ o pkg/seaice: another attempt to make the adjoint work for sea ice dynamics
+   - re-initialize more variables in seaice_lsr: u/vIceC, u/vIceNm1
+   - add an auxilliary variable "bet" and fix store directives and keys in
+     seaice_lsr_tridiagu/v, this seems to do the trick (i.e. more or
+     less exact gradients in my tests); but there are still
+     recomputation warning (although gradients are sort of OK), when
+     SEAICE_LSR_VECTORIZE is not defined, so this flag and
+     SEAICE_LSR_VECTORIZE_ZEBRA are recommended for efficiency.
+   - update verification experiments lab_sea.
+   - change some comments in S/R seaice_calc_viscosities
+ o model/src:
+   - if staggerTimeStep=T, always apply exchange to velocity field in
+     do_stagger_fields_exchanges.F instead of in do_fields_blocking_exchanges.F
+     (independent of using multi-dim advection or not); no effect on FWD run
+     but affects AD results (at machine truncation level): update output of
+     experiment 1D_ocean_ice_column (ad: 12 digits), hs94.1x64x5 (ad,oad: 13.d)
+     and isomip (oad: 12.d).
+ o pkg/generic_advdiff:
+   - stop if doAB_onGtGs is set to FALSE but ignored
+   - refine warning related to stability of tracer time-stepping
+     regarding internal wave dynamics.
+   - setting of AdamsBashforth_T,S when doAB_onGtGs=F: remove condition
+     on staggerTimeStep & implicitIntGravWave (will now get a warning
+     if potentially unstable).
+ o pkg/kl10:
+   - add new pkg "kl10" for mixing due to internal wave breaking, from
+     http://www.sciencedirect.com/science/article/pii/S1463500310000144
+     (contribution from Jody Klymak), tested in verification experiment
+     verification/internal_wave/input.kl10/
+ o isomip experiment:
+   - test pkg/shelfice with Non-Lin Free-Surf in one of the FWD set-up
+     (input.htd) and update the output.
+ o cd_code experiments:
+   - use default cd_code options (#undef CD_CODE_NO_AB_MOMENTUM &
+     #undef CD_CODE_NO_AB_CORIOLIS) in experiments: cfc_example (fwd)
+     global_ocean.90x40x15 (ad & oad) and OpenAD (ad & oad) and
+     update the corresponding output.
+ o pkg/seaice:
+   - reduce the number of include files and store directives in
+     S/R seaice_lsr_tridiagu/v
+   - change the order of loops in one case in S/R seaice_lsr_tridiagv
+     (only for SEAICE_VECTORIZE_LSR_ZEBRA defined), which allows me to
+     get rid off one store directive (a TAF bug?)
+   - add one more instance of ifdef SEAICE_VECTORIZE_LSR_ZEBRA in
+     S/R seaice_lsr_tridiagv to change the loop range for consistency
+   - remove ilcall, m from parameter list of S/R seaice_lsr_tridiagu/v
+   - fix a bug that affects the JFNK solver: replace sNx/y by i/jMax in
+     S/R seaice_lsr_tridiagu/v (requires update of
+     offline_exf_seaice/input.dyn_jfnk)
+ checkpoint65a (2014/07/27)
+ o model/src:
+   - Non-Lin Free-Surf in p/z coords: allows hFacW,S to be larger than
+     surrounding hFacC=1 @ edge of a step with different kSurfC on either side
+     (topo in p-coords, ice-shelf in z-coords); update output of experiments
+     tutorial_global_oce_in_p and isomip (both AD and OpenAD output).
+ o model/src:
+   - collect momentum forcing tendency into local 2-D array (passed as argument
+     to apply_forcing S/R); this simplifies mom. Forcing diagnostics and CD_CODE
+     parts in timestep.F (without CD_CODE_NO_AB_MOMENTUM defined = the default);
+     affects results at machine truncation level (e.g., if using OBCS_SPONGE).
+   - collect T & S forcing tendency into local 2-D array (passed as argument to
+     apply_forcing S/R); add 3-D diagnostics for temp & salt forcing tendency.
+     affects results at machine truncation level (e.g., ocean: if using
+     SHORTWAVE_HEATING ; atmos: if using FrictionHeating or (atm_Rq<>0) moist
+     correction due to vertical advection).
+   - update output of experiments: fizhi-cs-32x32x40 (13 digits),
+     global_ocean.cs32x15 (fwd: icedyn, seaice, thsice, all 3 @ 11d; adm & tml:
+     seaice_dynmix & thsice, fwd grd @ 3 & 8), hs94.1x64x5 (ad grd @ 13),
+     obcs_ctrl (ad & fwd grd @ 12 & 7).
+ o pkg/ptracers & diagnostics:
+   - use ptracers (short) name (instead of long one) to make ptracers diagnostics
+     title (to avoid some unexpected truncation); sort out ptracers diags units.
+   - collect ptracer forcing tendency into local 2-D array (passed as argument
+     to apply_forcing S/R); add 3-D diagnostics for ptracers forcing tendency.
+ checkpoint65 (2014/07/18)
+ o pkg/fizhi:
+   - add parenthesis around fizhi tendencies in fizhi_tendency_apply.F: this
+     affects results at machine truncation level. Update output of experiments
+     fizhi-cs-32x32x40 (12 digits for cg2d) & fizhi-cs-aqualev20 (13 digits).
+ o pkg/seaice: more clean up
+   - rename TAF common block tapes to be more consistent and remove
+     unnecessary duplicates
+   - add store directives to remove more recomputations, but use smaller
+     tapes (and adjust keys) when SEAICE_LSR_ADJOINT_ITER is undefined.
+     The idea behind this flag is to reduce the memory footprint when the
+     adjoint of the LSR is not required. As of now, defining the flag
+     SEAICE_LSR_ADJOINT_ITER increases 4 common block tapes for 2D field by
+     a factor of SOLV_MAX_FIXED (=500 by default in SEAICE_SIZE.h).
+     For experiment offline_exf_seaice, this means on a linux box with gfortran
+     nearly a factor of 10 (but keep in mind there is mostly seaice code in
+     this experiment):
+     > size mitgcmuv_ad
+     text    data        bss     dec        hex
+     5100659 1216  220458952  225560827  d71c8fb
+     5339425 1200 1868783272 1874123897 6fb4dc79 (SEAICE_LSR_ADJOINT_ITER)
+     but only a moderate increase of 36% for global_ocean.cs32x15:
+     text    data        bss     dec        hex
+     6695027 1648 1014578664 1021275339 3cdf6ccb
+     6695203 1648 1382505320 1389202171 52cd8afb (SEAICE_LSR_ADJOINT_ITER)
+   - note: there are still recomputations in global_ocean.cs32x15 and
+     offline_exf_seaice and the gradient agreement changes (gets a
+     little worse) for global_ocean.cs32x15 (-> update output_adm.seaice.txt)
+   - in general, the AD gradients still are wrong
+ o OpenAD
+   - clean up code_oad/ directories somewhat by moving files
+     dontCompile, dontTransform, keepOriginal to OAD_support/
+ o model/src:
+   - using MOM fluxform and Non-Lin Free-Surf with momDissip_In_AB=F
+     (not currently tested): add dissipation terms before NLFS rescaling of
+     tendencies (previously done after).
+ o pkg/diagnostics:
+   - write stats-diags in ascii file with more digits (same as in monitor).
+ o pkg/down_slope:
+   - drop the bi,bj dimension of argument recip_hFac in S/R DWNSLP_APPLY; with
+     NLFS (not tested), use new recip_hFac value in order to conserve tracer.
+ o model/src:
+   - new file "apply_forcing.F" containing all the code previously in
+     external_forcing.F, but with new argument list: pass, as new argument,
+     the current level tendency array to update (instead of a direct update
+     of the common bloc array). Change the corresponding calls.
+   - add CPP option USE_OLD_EXTERNAL_FORCING (default is undef) to use
+     EXTERNAL_FORCING_U,V,T,S subroutines (for backward compatibility).
+ o pkg/seaice/seaice_lsr, a little bit of clean up
+   - rearrange some code blocks, so that now all calculations for
+     setting up the right-hand-sides done within one single block
+     (I find that easier to read and understand)
+   - rearrange freedrift-code to reduce the number of ifdefs
+   - adjust some indentations and comments
+ checkpoint64z (2014/07/10)
+ o model/src and several pkgs:
+   - change argument list of all S/R called from external_forcing.F and
+     called from ptracers_forcing.F (renamed to ptracers_apply_forcing.F)
+     to pass, as argument, the current level tendency array to update
+     (instead of a direct update of the common bloc array).
+   - change also (in the same way) argument list of PTRACERS_APPLY_FORCING;
+   - rename taueddy_external_forcing.f to taueddy_tendency_apply.F
+ o pkg/seaice/seaice_lsr.F
+   - always initialize local arrays in seaice_lsr_tridiagu/v
+   - add more local tapes to seaice_lsr_tridiagu/v
+   - move storing u/vice(:,:,bi,bj) out of seaice_lsr_tridiagu/v, but
+     keep it in bi/bj loop; this seems to be essential
+   - gradients are still wrong but only by 4-7 orders of magnitude
+     instead of 15 orders of magnitude, lab_sea improves a little
+ o pkg/seaice
+   - (pkg/autodiff) remove storing/restoring of seaiceMaskU/V that
+     generates unnecessary code in seaice_lsr_ad
+   - add more store directives in seaice_lsr to avoid unnecessary code
+     in seaice_lsr_ad
+   - exclude some residual computations in seaice_lsr when
+     ALLOW_AUTODIFF_TAMC is defined in order to avoid unnecessary code
+     in seaice_lsr_ad
+   - add more storing, a new tape (model/src/the_main_loop.F) and
+     another key for SEAICE_LSR_VECTORIZE_ZEBRA (the local keys ilockey
+     and klockey should be checked by a specialist)
+   - modify ( define SEAICE_VECTORIZE_LSR and SEAICE_LSR_ADJOINT_ITER )
+     and update lab_sea after previous changes in pkg/seaice below
+ o pkg/autodiff:
+   - introduce useSmoothCorrel2DinAdMode, SEAICEapproxLevInAd, and
+     viscFacInAd : run time parameters allowing for adjoint switches
+     note : logic for useSmoothCorrel2DinAdMode is in ctrl_readparms.F
+ o pkg/ecco:
+   - introduce cost_gencost_boxmean.F that computes a box mean
+     temperature (for use in adjoint sensitivity studies).
+ o model/src/set_defaults.F : initialize viscFacAdj to 1.
+ o pkg/mom_common/mom_calc_visc.F:
+   - ifdef ALLOW_AUTODIFF then include viscFacAdj factor.
+ o pkg/seaice/seaice_summary.F:
+   - statement for SEAICEadjMODE now in autodiff_readparms.F
+ o pkg/seaice:
+   - remove some store directives and add new ones in an effort to get
+     finally rid off the recomputation warnings. This is successful
+     when SEAICE_VECTORIZE_LSR ***and*** SEAICE_LSR_ADJOINT_ITER are
+     defined (i.e. no extensive recomputation warnings left), but there
+     are still too many recomputations on the solver iteration level
+   - define SEAICE_VECTORISZE_LSR in offline_exf_seaice/code_ad/SEAICE_OPTIONS.h
+   - move definition of MPSEUDOTIMESTEPS into TAMC-block in
+     SEAICE_SIZE.h
+   - add a store directive in S/R seaice_calc_viscosities
+ o pkg/seaice (ITD code):
+   - fix definition of Hlimit for multi-threaded case
+   - use double precision arithmetic to compute Hlimit: this affects results;
+     update output of experiment seaice_itd.
+ o replace content of verification/seaice_itd
+   - instead of a 1D column use the configuration of offline_exf_seaice
+     to test the ice thickness distribution code with ridging
+   - this is a first shot at this experiment
+   - change of some defaults of ridging parameters SEAICEhStar (from
+to 25) and SEAICEmuRidging (from 5 to 3) in seaice_readparms.F
+     and lot of new comments.
+ checkpoint64y (2014/06/20)
+ o pkg/seaice/seaice_reg_ridge.F:
+   - modify the regularization of very small volumes of ice; only check
+     total volume HEFF, and do not apply correction to individual ice
+     classes because that leads to funny patterns in the heat and fw-fluxes
+     into the ocean. Adjust seaice_itd/results/output.txt
+   - replace nITD by SEAICE_multDim in loop-ranges
+ o pkg/exf:
+   - add code to process the case field period = -12. with UV interpolation.
+   - move debug print (formerly active when exf_verbose=T) from EXF_getFFieldRec
+     into S/R that calls it (i.e., exf_set_gen.F, exf_set_uv.F & obcs_exf_load.F)
  o verification/global_with_exf:
-   - swith all fields period to -12. (was previously untested) in input/data.exf
+   - switch all fields period to -12. (was previously untested) in input/data.exf
      (but keep secondary test ".yearly" unchanged); update the reference output.
  o pkg/cal:
    - new calendar type "noLeapYear" for 365 days calendar without any leap year.
  o pkg/exf:
    - new integer parameter "exf_debugLev" (default set to main model debugLevel)
      to replace logical switch "exf_verbose"
-   - report in STDOUT when loading a new reccord (if exf_debugLev >= 3)
+   - report in STDOUT when loading a new record (if exf_debugLev >= 3)
  o pkg/sbo:
    - update from Katherine Quinn: evaluate mass directly from density and SSH
      (budget using Finite Volume method) instead of from bottom pressure.
-Line 28 
 o model/src & most packages:
+Line 709 
 o model/src & most packages:
      + call LAND_READPARMS from packages_readparms.F
  o pkg/seaice:
    - remove code that resets useThSice in S/R seaice_readparms and
-     replace by a warning in S/R seaice_check
+     replace it by a warning in S/R seaice_check
    - remove parameter MULTDIM, replace with nITD and runtime
      parameter SEAICE_multDim (still hard-wired to nITD if
      SEAICE_ITD is defined)

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