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-revision 1.975 by mlosch,
Mon Apr 14 09:45:35 2008 UTC
+revision 1.1137 by jmc,
Tue Jun 30 00:02:32 2009 UTC
 Line 4 
 $Name$
      Notes on tags used in MITgcmUV
      ==============================
+ o pkg/exch2 (exch2_rxN_cube*):
+    remove last BARRIER (no need to synchronise after getting data from shared
+    buffer (get) as long as any change to buffer (put,recv) is between BARRIER)
+ o change tiling of natl_box (from 2 to 4 tiles) to get it tested with MPI+MTH
+   and generate new output (for the 2 tests) using default rotationPeriod.
+ o pkg/exch2:
+   - always call exch2_*_cube, not exch-1 anymore, if useCubedSphereExchange=F
+     (was already the case with AUTODIFF_EXCH2 defined)
+   - add bj in exch2 arrays and S/R.
+   - can now use pkg/exch2 for regular (non CS) set-up; switch test experiment
+     MLAdjust to exch2 (identical results except with MPI -> truncation diff);
+ o add pkg/longstep for ptracer timestep a multiple of U/V/T/S timestep
+   - adds deltaT argument to the subroutines TIMESTEP_TRACER DWNSLP_APPLY
+     GAD_ADVECTION GAD_CALC_RHS GAD_IMPLICIT_R GAD_SOM_ADVECT
+   - verification experiment natl_box.longstep
+ o build_options: ifort+mpi_aces optfile (following Constantinos advise):
+   allow different versions of ifort (8 or 9) and different versions
+    of mpi (mpich or mpich2) to be used with the same optfile.
+   requires to load a netcdf module and set MPI_INC_DIR (see comments inside
+    optfile). Change testing scripts (example_scripts/ACESgrid) accordingly.
+ o pkg/seaice:
+   fix previous modif (3-level field removed) for old-pickup reading
+ checkpoint61r
+ o pkg/seaice:
+  - clean up the 3-time levels of UICE,VICE,HEFF,AREA in three steps:
+. introduce fields for time step (N-1)
+. do not use levels 2 and 3 anymore (but keep them)
+. replace 3D versions of UICE,VICE,HEFF,AREA by 2D versions. This
+      includes changes to pkg/thsice/thsice_get_velocity.F,
+      model/src/external_forcing_surf.F, pkg/obcs/obcs_apply_seaice.F, and
+      pkg/obcs/obcs_apply_uvice.F.
+  - completely remove code for leap-frog time stepping for second order
+    advection
+  - adjusted adjoint accordingly;
+    gradient checks have improved by an order of magnitude!
+ checkpoint61q
+ o pkg/seaice: fix bug in free slip boundary conditons for LSOR solver
+  - the boundary conditions along open boundaries are unclear, because the
+    associated masks are set to zero and are thus treated as closed when
+    applying the slip-boundary conditions.
+  - move initialisation of grid variables from seaice_init_varia to _fixed
+ o adding doc/diags_changes.txt
+ o model/src:
+   do_the_model_io: rename few pkg S/R which are called from do_the_model_io,
+    to avoid "_diags" naming if no relation to pkg/diagnostics.
+   ini_theta,ini_salt: fix (at least compile the code) reading from NetCDF
+    file and only call PLOT_FIELD_XYZ if debugMode=T.
+   remove few PLOT_FIELD_XY calls outside initialisation.
+   remove few unnecessary BARRIER.
+ o pkg/salt_plume: add SaltPlumeSouthernOcean to allow disabling
+   of salt_plume package in Southern Ocean
+ o pkg/thsice:
+  - fix hOceMxL in overlap (needed for sea-ice advection);
+    update output of experiment global_ocean.cs32x15.icedyn.
+ o pkg/seaice:
+  - make the (placeholder-)tracer IceAge a little more meaningful
+   by avoiding ridging of age due to convergent ice flow
+  - add diagnostics for surface temperature, atmospheric and oceanic
+    heat flux, and atmospheric and oceanic ice growth
+ checkpoint61p
+ o eesupp (global_max & global_sum):
+  - add one more element to buffer (start at index 0) for GL_MAX/SUM output;
+  - remove starting & endding barrier (no longer needed)
+ o pkg/mdsio, writelocal:
+    works also in multi-threaded when LOCBIN_IO_THREAD_SAFE is undefined
+    (remove the STOP): uses shared buffer IO to store data from all threads
+    and then let master-thread write nThreads tiles.
+ o pkg/mdsio (read/write field):
+  - tiled IO done in 1 piece (all levels at a time);
+  - new header file "MDSIO_BUFF_3D.h" with 3-D buffers.
+  - multi-threaded: allow to read/write local (non-shared) array
+    (was already working with singleCpuIO ; now works also without);
+    => no longer needs barrier call after reading a file (added inside
+    mds_read/write field).
+  - move barrier calls outside gather/scatter_2d to mds_read/write_field
+ o pkg/obcs/exf
+   - exf_getffieldrec.F: add a few ". _d 0" and
+                         add code to catch the case fldperiod = 0.
+   - obcs_precribe_read.F: change if statements so that they match
+                           the variable type (_RL)
+   - add a separate exf_iprec_obcs to exf_set_obcs (by default equal to
+     exf_iprec) as part of namelist EXF_NML_01
+ o pkg/mdsio:
+   - read/write tiled (local) files: read/write 1-level tile chunk at a time
+     (instead of segment of length sNx); expected to speed up tiled IO.
+ o pkg/exch2:
+   - take buffer copy from/to array out of S/R exch2_send/recv into new
+     S/R exch2_put/get ; Exch of local variable now works with MPI+MTH
+     (tested by removing commom block statement in SOLVE_FOR_PRESSURE.h).
+   - ad version of send/recv no longer needed (but needs exch2_ad_put/ad_get)
+   - simplify argument list of S/R exch2_get_uv_bounds and exch2_get_scal_bounds
+     (which replaces exch2_get_recv_bounds & exch2_get_send_bounds) by
+     including Topology header file (and common blocks).
+   - implement EXCH_IGNORE_CORNERS in scalar exchange (rx1);
+     remove 2nd exch call in exch2_s3d_rx (no longer needed).
+   - document S/R arg. list (+ update some comments)
+ o pkg/seaice:
+   - added SEAICE_CLIM_AIR code, which permits modulation of surface air
+     temperature and humidity over sea ice based on climatological values.
+   - clean up computation of Hibler+Bryan (1987) stress coupling for the case
+     of LSR (this change is expected to change the results slightly because now
+     it uses slightly difference moduli from the second last LSR solution, but
+     that is more consistent with the stress computations; this part of the code
+     is not tested in the verification experiments)
+   - fix diagnostics for flux of ice in case of B-grid
+   - turn strain rates eij and press into global fields within global
+     common block in SEAICE.h for more straighforward diagnostics
+   - fix diagnostics for principal stress components, press, zeta, eta
+     to give something meaning full
+ o change tiling of global_ocean.cs32x15 (12 tiles, 32x16) and generate
+   new output (all 4 tests) using default rotationPeriod.
+ o pkg KPP:
+   - add flag (LimitHblStable) to avoid limiting BL depth under stable conditions
+   - fix vertical indices in RI_IWMIX (match between KPP grid from 0 to Nr+1
+     and normal grid from 1 to Nr)
+ o Fix computations of L4rdt in mom_calc_visc.F
+ o eesupp:
+   new S/R ALL_PROC_DIE (like EEDIE, without irrelevant threads err msg):
+   should be called before a "stop" if we know that all process are going
+   to stop; if one Proc does call this S/R, will hang in MPI_FINALISE.
+ checkpoint61o
+ o pkg/exch2: change check_depths to issue just a warning (instead of error+stop)
+ o model/src/ini_curvilinear_grid.F:
+    compute angleSin/CosC when they are not read from a file
+ o pkg/seaice:
+    add pseudo time stepping for LSOR
+ o pkg/exch2:
+    temporary fix for exch2_s3d_rx; update results of exp. hs94.cs-32x32x5.impIGW
+ o pkg/seaice:
+    Adding separate sea ice albedo, drag coefficients, and HO in Southern
+    Ocean from those in Arctic Ocean.  See *_south in SEAICE_PARAMS.h
+ o SingleCpuIO:
+    fix bug put before chkp61n (May 11), when more than 2 MPI cpu are used.
+ o pkg/seaice:
+    put exchanged variable in (local) common block for MPI+Multi-Threads
+    to work (necessary with exch1, and for now with exch2 too).
+ o verification: to get more experiments tested with mpi, mth and mpi+mth,
+   change tiling of:
+    aim.5l_Equatorial_Channel, aim.5l_LatLon, dome, exp4, global_ocean.90x40x15,
+    hs94.cs-32x32x5, MLAdjust, offline_exf_seaice & tutorial_plume_on_slope
+   update output of exp:
+    exp4, global_ocean.90x40x15(+.dwslp), MLAdjust(all 5),
+    tutorial_plume_on_slope and hs94.cs-32x32x5 (use default rotationPeriod)
+   + ideal_2D_ocean: use default rotation period + test Global_Sum_SINGLECPU
+                    (note: output.txt generated on faulks using only 1 tile)
+ o eesupp & mdsio (SingleCpuIO):
+  - remove MISSING_TILE_IO (from MDSIO_OPTIONS.h), replaced by run-time
+    parameter "W2_useE2ioLayOut" (read from file "data.exch2").
+    Note: was not effective for globalFile & useSingleCpuIO=F; now fixed.
+  - move MDSIO_SCPU.h (pkg/mdsio) to EEBUFF_SCPU.h (eesupp/inc).
+  - fix GLOBAL_SUM_SINGLECPU when using Exch2; re-use same buffers and same
+    gather/scatter S/R as with SingleCpuIO (=> 1 less 2D global RL array).
+ o pkg/exch2:
+  - new code to set-up W2-Exch2 topology (replace matlab-topology-generator):
+    read parameter file "data.exch2" if it exists; otherwise try default regular
+    cube without blank-tile; new header file "W2_EXCH2_SIZE.h";
+  - update matlab-topology-generator (exch2_setup_cs6_print.m) to be compatible
+    with new code (not to be used, just as a backup solution).
+  - add examples (e.g., for lat-lon-cap_120) of parameter file "data.exch2"
+    in utils/exch2/input.
+ checkpoint61n
+ o eesupp & mdsio (SingleCpuIO):
+   - move mapping to global io-buffer inside gather_2d/scater_2d: this save
+     memory (1 less 2D global RL array); skip 1 buffer copy; and only send/
+     receive real*4 array (instead of real*8) to read/write 32.bit files.
+     (new template for gather_2d/scater_2d, new set of S/R MDS_PASS_R4,8toRL,S
+      and remove new mapping S/R)
+ o pkg/mdsio: in preparation for topology-generator within pkg/exch2:
+   - Change declaration of SingleCpuIO buffer, reduced to only 1 dim.:
+     xyBuffer_size, which is set to W2_ioBufferSize from W2_EXCH2_PARAMS.h
+     when using exch2. Add S/R to map global io-buffer to global model array.
+   - uses exch2_global_Nx,y instead of exch2_domain_nxt,nyt.
+ checkpoint61m
+ o write_utils : change WRITE_1D_R8 to WRITE_1D_RL
+   and add 3 other S/R for other types (R4,R8,RS).
+   Change calls to WRITE_0D/1D_R[4,8,S,L] to match the type of argument.
+ o eesupp/inc/CPP_EEMACROS.h (EXCH & GLOBAL_SUM/MAX macros):
+  - ensure suffix (_R4,_R8,_RS,_RL) correspondance between macro and S/R ;
+  - reduce number of macro definitions (keep only those which are used);
+    can always call directly the corrresponding S/R if needed.
+  - everywhere in the code: change macros (EXCH & GLOBAL_SUM/MAX) suffix
+    _R4/_R8 to _RS/_RL when applied to _RS/_RL variable.
+  Fixed wrong type of arg in:
+    atm2d/put_ocnvars.F cheapaml/cheapaml.F ocn_compon_interf/ocn_apply_import.F
+    ctrl/ctrl_map_ini_ecco.F seaice/seaice_do_diags.F seaice/seaice_model.F
+  To fix: global_sum of var in common block is wrong (multi-threaded) in:
+    dic/dic_atmos.F ebm/ebm_area_t.F ebm/ebm_zonalmean.F sbo/sbo_calc.F
+  To fix: aim_v23/aim_do_co2.F (BARRIER & GLOBAL_SUM within bi,bj loops)
+ o adjustment.cs-32x32x1: test "blank tiles" when compiling with mpi; 2nd
+   "nlfs" mpi test is going to stop when checking for unconnected tile egdes.
+ o eesupp/src: new S/R to stop everyone when 1 (or more) Proc. find an error
+ o pkg/exch2: new S/R EXCH2_CHECK_DEPTHS to check that unconnected tile
+   edges are closed (zero depth); might happen with "blank tiles";
+   for now, disabled if using OBCS.
+ o tools/gemake2: delete modifs from March 27-29 2009 (with option "-mpi":
+   link *_mpi files from "MODS" dir) to return to a strait-forward behavior.
+ o move read_write.F to write_utils.F ; new parameter (maxLengthPrt1D)
+   to reduce length of 1.D array print in STDOUT.
+ o adjustment.cs-32x32x1: changed to oceanic test with 1 continent
+   + use 48 tiles (16x8): this will allow to test "blank tiles".
+ o start to test MPI + multi-threaded (change testreport to skip tests
+   where number of tiles do not match).
+ o genmake2: add option "-omp" to turn on Open-MP ;
+   passed to testreport (if using -mth) ; merge few (*+mth) optfiles.
+ o pkg/exch2 (+ utils/exch2): ignore blank tiles (instead of removing them)
+   and keep the original tile numbering. Note: compatible with old
+   W2_EXCH2_TOPOLOGY.h & w2_e2setup.F topology files.
+ checkpoint61l
+ o Overlaps had been forgotten in calculating ijk keys : fixed
+ o fix cyrus makedepend for gcc 4.4
+ o experiment fizhi-cs-aqualev20:
+   switching to new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE)
+   and generate new output. Note: new output is much closer to the old
+   one (v1.8) generated with pgf77 -O2 on Mar 14 2007 than it is from
+   the previous one (v1.9) generated with pgf77 -O0 on Jun 13 2007.
+ o pkg/fizhi:
+  - change to avoid indices going deliberately over array-bounds
+  - remove unnecessary MPI stuff
+  - perpetual spring equinox with "#define FIZHI_USE_FIXED_DAY"
+  - new version of S/R GETPWHERE available with #define TRY_NEW_GETPWHERE:
+    does not go over array-bounds and therefore returns reliable output.
+  - in fizhi_driver.F & fizhi_turb.F, fix "get_alarm" calls:
+    this S/R has 4 output arguments, which are used inside "get_alarm";
+    when it is called with the same variable "ndum" in place of several
+    output arguments, this produces weird side effect inside "get_alarm"
+   (e.g., datein=dates(n) is overwritten by timein=times(n) since both
+    datein & timein, resp. 2nd and 3rd arg., are pointed to the same "ndum"
+    address) and produces error.
+ o tools/gemake2: (March 27-29 2009)
+   with option "-mpi": link *_mpi files from "MODS" dir (this is what
+   testreport does).
+ o lab_sea experiment: change from 2x1 tiles to 2x2 tiles and regenerate output
+ o pkg/seaice: fix bug in new version of S/R SEAICE_LSR.F:
+    update lab_sea.lsr & lab_sea.salt_plume results
+ o pkg/seaice:
+   Major overhaul of the LSOR solver: change discretization from original
+   finite differences to finite volume. The old routine is still in the
+   file seaice_lsr.F and can be turned on with the CPP-flag
+   SEAICE_OLD_AND_BAD_DISCRETIZATION
+   Along with this change, the discretization of the strain rates is changed.
+   The same flag turns on the old discretization in seaice_calc_strainrates.F
+   All verification experiments with seaice are affected (except for
+   seaice_exf_offline); global_ocean.cs32x15/input.icedyn recovers the old
+   results by setting the above flag.
+   Further changes involve changes in defaults:
+   - ALLOW_FLOODING is defined and turned on by default
+   - SEAICEadvSnow = .true. is now the default
+   - SEAICEadvSalt = .true. is now the default
+   - SEAICEadvAge  = .true. is now the default
+   - SEAICE_clipVelocities  = .false. is now the default
+                                      (as per J. Zhang's recommendation)
+   - B-grid, and thus not tested: SEAICE_TEST_ICE_STRESS_1/EXPLICIT_SSH_SLOPE
+     is defined, SEAICE_TEST_ICE_STRESS_1 is renamed into SEAICE_BICE_STRESS
+   - seaice_growth: replace computation of UG by a simple copy from wspeed
+ checkpoint61k
+ o pkg/seaice: a few bug fixes mostly concerning the metric terms:
+   seaice_lsr: fixed a few metric terms,
+               affects lab_sea.lsr, lab_sea.salt_plume, seaice_obcs
+               add more debugging diagnostics
+   seaice_evp: removed superfluous many metric terms of FV discretization
+               of stress divergence
+               affects lab_sea, lab_sea.hb87
+   seaice_ocean_stress: removed superfluous many metric terms of FV discretization
+               of stress divergence for non-evp solver
+               (this part is not tested anywhere)
+   seaice_calc_strainrates: fixed a bug in no-slip boundary conditions,
+               they were effectively only half slip
+               affects lab_sea.hb87
+   updated all relevant verification experiments (except lab_sea//output_adm.txt
+     which was left over, but fails at level 7 & 6)
+ checkpoint61j
+ o pkg/seaice: turn a few hard wired parameters into run time parameters
+ o pkg/seaice/exf/monitor: turn netcdf coordinate variable T into model
+   time in seconds as promised by the usints in seaice_monitor and exf_monitor
+ o pkg/mnc: fix the coordinate variables for multi-tile curvi-linear grids
+   that are not cubed-sphere grids
+ o pkg/seaice: fix a bug for the rare case of SEAICE_VECTORIZE_LSR
+ o pkg/ctrl:
+   fix bug in ctrl_depth_ini.F (EXCH_XYZ was applied to 2-D field xx_r_low)
+ o non-hydrostatic (calc_gw.F):
+   fix viscA4 on CS-grid + fix diagnostics: Wm_Diss & Wm_Advec
+   update output of exp. global_ocean.cs32x15.viscA4
+ o remove backward compatibility for thetaMin,phiMin
+   (replaced by xgOrigin,ygOrigin on Jan 27, 2009)
+ o pkg/exf: fix a serious bug in exf_set_uv.F: do a rotation of the
+   interpolated wind field not only for curvilineargrid=.true., but also
+   for a rotated grid (rotateGrid=.true.)
+ o pkg/exf: add capability to bypass interpolation for runoff
+   by setting yet another CPP-flag
+ o eesupp/src, B-grid exchange:
+   add simple (6 tiles, non MPI) CS exch + standard interface S/R.
+ o autodiff
+   new CPP option ALLOW_TAMC_SINGLEPREC_COMLEV
+   allows to switch to single-prec common blocks;
+   corresponding switch occurs in tamc.h, integer isbyte
+   TAF store directivs "byte" and "kind" seem equivalent;
+   Most tamc.h have been updated correspondingly.
+ checkpoint61i
+ o autodiff:
+   fix autodiff_sore/_restore indices for obcs
+   (spotted by I. Hoteit, M. Mazloff)
+ o pkg/autodiff, pkg/ctrl:
+   Add flag to reduce all tapelev I/O to single-prec.
+   In data.ctrl set
+     doSinglePrecTapelev = .TRUE.
+ o model/src/ini_curvilinear_grid.F, new grid-file format without EXCH2:
+   check in hack for SX8 compiler (for dxV, dyU); remove it afterwards.
+ o pkg/shelfice: fix bug with SHELFICEconserve flag, prepare for
+   real fresh water flux (not yet)
+ o pkg/mdsio & rw:
+  - add argument & option to S/R MDS_WRITEVEC_LOC (avoid Open/Close & write-meta)
+  - add simple interface S/R to MDS_WRITEVEC_LOC in pkg/rw: WRITE_GLVEC_RX.
+ o pkg/flt:
+  - replace FLT_INIT by 3-steps standard initialization S/R: readparms,
+    init_fixed & ini_varia.
+  - clean-up & simplify linear interpolation S/R:
+    move flt_bilinear.F -> flt_interp_linear.F ; add arg. myThid.
+  - fix some indices (mainly vertical index) ; add IMPLICIT NONE.
+  - more efficient I/O, using new options of MDS_WRITEVEC_LOC S/R.
+  - add vert. coordinate & horiz. indices to output files.
+  - change vertical position in initial condition, from index to depth [m].
+  - store horizontal (decimal) indices i,j in common block (instead of coord. x,y)
+    (easier to get to a curvilinear grid) ; delX,delY no longer used.
+ o pkg/ggl90: a few modifications:
+  - fix bottom boundary condition, and interpolation of KappaE
+    near top and bottom
+  - use same set of viscosity/diffusivity for TKE/momnetum/tracer
+  - add smoothing option as in Blanke and Delecluse (1993) (--> ALLOW_GGL90_SMOOTH)
+  - add a few options for mixing-length upper limit (--> mxlMaxFlag)
+ o rename thetaMin,phiMin -> xgOrigin,ygOrigin
+   (maintain temporary backward compatibility, until next checkpoint)
+ checkpoint61h
+ o pkg/diagnostics with "periodic averaging diagnostics":
+   fix S/R DIAGNOSTICS_COUNT ; hack diagnostics_out.F to get NetCDF output.
+ o pkg/my82: add missing "_d 0" ; update output of exp. vermix.my82
+ o pkg/obcs: fix loop ranges for balancing code
+ o pkg/flt:
+  - improve criteria for finding which tile owns a float.
+  - fix FLT_EXCH for case without MPI ; apply cyclic BC + fix also the MPI case.
+ o Add well-mixed CO2 box in aim_v23 (which includes changes in pkg
+   aim_compon_interf, ocn_compon_interf, gchem, and dic to get coupling
+   with ocean biogeo)
+ o pkg/flt:
+  - do some cleaning and fix the restart ;
+  - add output.txt in flt_example/results to get this pkg tested.
+ o genmake2: add an EXTENDED_SRC option and flag.
+    for now, cannot be turned on on command line (only through genmake_local)
+ o pkg/mdsio: read/write vector:
+  - singleCpuIO: fix RL/RS in MDSWRITEVECTOR by calling new S/R MDS_BUFFERtoRL/RS
+  - singleCpuIO=F: fix arrType & filePrec & _BYTESWAPIO in both MDSREADVECTOR
+    & MDSWRITEVECTOR by calling new S/R MDS_RD/WR_VEC_RL/RS.
+  - affects gradient of test-exp "bottom_ctrl_5x5" (not due to _BYTESWAPIO)
+   (drop to 4 digits matching for grad). But this test does not look very
+   reliable (was already failling on eddy, fc5, at 6.digits). Update output.
+ checkpoint61g
+ o pkg/flt:
+   - move FLT_CPPOPTIONS.h to FLT_OPTIONS.h (standard name)
+    + make OPTIONS file more standard.
+   - rename S/R MDSREADVECTOR_FLT to FLT_MDSREADVECTOR (to mach src file name)
+   - fix _BYTESWAPIO CPP-Flag
+   - standard reading of file-parameter "data.flt"
+   - fix argument list of S/R FLT_RESTART
+   still need to fix _BYTESWAPIO in pkg/mdsio/mdsio_writevector.F
+ o pkg/obcs: fix a CPP-flag, bug reported by Jeff Blundell
+ o gather_2d.F/scatter_2d.F: suppress vectorisation on NEC SX in respond to
+   a still unfixed compiler/optimization bug
+ checkpoint61f
+ o pkg/seaice, LSR solver: fix bug in GLOBAL_MAX calls ;
+   update results of global_ocean.cs32x15.icedyn test.
+ o move getcon.F from model/src to pkg/fizhi.
+ o pkg/exf: add parameter for extrapolation of temp up to the surface
+    and option to prevent negative evap (in bulk_largeyeager04 only).
+ o Prather Advection scheme: fix tracer conservation for divergent flow
+   (e.g., when using NonLin Free-Surface).
+ o kpp: retire KPPmld diagnostics --> use MXLDEPTH instead
+ o gmredi (Visbeck-variable-K):
+  - add more parameters to Visbeck-variable-K.
+  - use a 5 points average for dSigmaR in Visbeck-K calculation
+    (more "homogenous": same stencil and same weights as in dSigmaH)
+  - update output of ideal_2D_oce experiment.
+ o fix CPP-flag REAL4_IS_SLOW, when _RS expands into real*4
+   (#undef REAL4_IS_SLOW)
+  - pkg/mnc/mnc_cw_cvars.F: write _RS-grid variable as netcdf-real*4
+    coordinate variable
+  - pkg/monitor/monitor.F: call mon_printstats_rs for _RS variables
+    (surface forcing fields), removes some of the functionality
+  - model/src/write_grid.F: write _RS variables as RS-netcdf variables
+  - model/src/diags_oceanic_surf_flux.F: fix a few diagnostics, but
+    probably not all: copy _RS surface flux fields to RL field before
+    calling DIAGNOSTICS_FILL
+  - model/inc/CPP_EEMACROS.h: make the _EXCH_*_RS macros expand into
+    real*4 (CALL EXCH_*_RS) versions.
+  - tested in 2 experiments: inverted_barometer & solid-body.cs-32x32x1
+    (generate new output).
+ checkpoint61e
+ o gmredi (Visbeck-variable-K):
+   - fix the "OLD_VISBECK_CALC" option + move the #undef to GMREDI_OPTIONS.h
+   - change computation of Visbeck-K where Slope > Smax :
+     now: N*min(Slope,Smax) (similar to OLD_VISBECK_CALC with gkw91 taperFct)
+     previously was: M*sqrt(min(Slope,Smax)) ; update ideal_2D_oce output.
+ o bottom-drag in P-coord.: change units of bottomDragLinear & bottomDragQuadratic
+   to be the same as with Z-coord. (i.e., m/s & no-units respectively).
+ o calc_viscosity: fix index range (was wrong for CD-Scheme & explicit Visc)
+ o pkg gmredi, linear & fm07 tapering: put an upper limit on Slope^2 so that Kwz
+   does not become too large (to avoid precision problems in implicit-diffusion
+   solver); update ideal_2D_oce output.
+ o pkg ggl90:
+   - in ggl90_cal.F: compute only one set of visc/diff, used to
+     step forward TKE/T/S/momentum
+   - default value of GGL90viscMax/GGL90diffMax larger and equal (to
+     have Prandlt =1)
+ o gmredi (fm07):
+   - add lower limit on Transition layer thickness + lower limit on 1/lambda
+   - allow to set few more params from data.gmredi
+ o pkg ggl90:
+       - add missing sqrt(2) factor in computation of mixing length
+         scale in ggl90_calc.F
+         (see Eq. (2.35) in Blanke and Delecluse, JPO, 1993)
+ checkpoint61d
+ o adjoint modifs
+   - adapt to new field rhoInSitu
+   - allow to revert from StoreDynVars2D, StoreDynVars3D
+     to individual fields
+     (switches AUTODIFF_USE_OLDSTORE_2D, AUTODIFF_USE_OLDSTORE_3D)
+ o store 3-D (in-situ) density in commom block (DYNVARS.h)
+  - save 1 rho computation.
+  - no longer modify T & S inland when using down_slope pkg.
+ o gad_som : allow to switch to SOM advection for T & S without corresponding
+   pickup files (using new S/R: MDS_CHECK4FILE).
+ o keep removing _BEGIN/_END_MASTER between MDSIO S/R call
+   (for useSingleCpuIO to work in multi-threaded)
+ o pkg/shelfice:
+  - disentangle parameters: retire shelfIceFile in data/PARM05 and substitute
+    with SHELFICEtopoFile in data.shelfice
+  - move code for reading ice shelf topography and modifying hFacC into separate
+    subroutines of the shelfice package
+  - separate initialisation of "fixed" and "variable" variables
+  - kTopC is not (yet) replaced by kSurfC, although this is possible
+ o fix broken diagnostic SIatmFW and changed the units from m/s to kg/m^2/s
+ o add initialisation of deepFac if using Pcoords (new S/R set_grid_factors)
+   and rename:
+   ini_phiref.F          --> set_ref_state.F  (+ set anelastic factors)
+   ini_reference_state.F --> load_ref_files.F (- set anelastic factors)
+ o change FIND_RHO_SCALAR : return rho (instead of rho - rhoConst)
+ checkpoint61c
+ o add option ALLOW_ADDFLUID and run-time selector "selectAddFluid"
+   to add mass source/sink of fluid in the interior (3-D generalisation
+   of oceanic real-fresh water flux).
+ o pkg/monitor: fix recip_dr argument in mon_advcflw2 call (-> advcfl_W_hf_max)
+ o vermix test experiment: switch from LINEAR EOS to MDJWF (not tested before)
+ o new pkg: down_slope
+   density-driven downsloping flow parameterisation (Tellus, 1999, 412-430).
+   - presently, modify T & S inland (dwnslp_calc_rho.F).
+     can be avoided if rho was stored in common bloc and used in calc_phi_hyd.
+   - implementation for ocean in P-coords not tested.
+   - add secondary test to global_ocean.90x40x15 (input.dwnslp) to check this pkg.
+ o move kSurfC,kSurfW & kSurfS from SURFACE.h to GRID.h (next to kLowC)
+   (to facilitate conversion of oceanic pkg to p-coordinate).
+ o change FIND_RHO to FIND_RHO_2D :
+   pass arguments tFld & sFld as local (tile) 2D-arrays ; +fix EOS_CHECK.
+ o new pkg: cheapaml
+ checkpoint61b
+ o exch2:
+   change index bounds in rx2_cube exchanges (new S/R: EXCH2_GET_UV_BOUNDS)
+   - no longer depend on the order sequence (N,S,E,W).
+   - 3rd exchange no longer needed (tested with 24 tiles).
+   - same modif to hand-written adjoint S/R (global_ocean.cs32x15: zero diff)
+   - exch_UV_A-grid readily available (but not yet tested).
+   comment out 3rd exch call and remove copy of V to U at SE & NE face-corners
+   (both are no longer needed) in exch_uv: no effect in forward run; but
+    get truncation error differences with adjoint exch.
+ o exch2:
+  - change index-bounds storage (moved from target to local tile,
+    more intuitive this way) ; rename/remove some variables.
+  - change utils/exch2/matlab-topology-generator & code_mods accordingly.
+ checkpoint61a
+ o exch2/matlab-topology-generator:
+   fix bug in index bounds for N-S internal exchange (hard to tell if this
+   had any effect on the solution).
+ o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
+   is exceeded
+ o testreport: modify syntax of awk, so that it works also with
+   awk, and not only with nawk and gawk
+ checkpoint61
+ o autodiff
+   Change default for TAF usage by removing argument '-nonew_arg'
+   This changes TAF subroutine argument list (ordering of active var.)
+   Omission of this flag leads to incompatibility w.r.t. TAMC
+   To restore TAMC-compatibility, need following modifs:
+   * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
+   * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
+   Tested TAF version is 1.9.22
+   N.B.: exch2 hand-written adjoint code currently not TAMC compatible
+ checkpoint60
+ --->>> This is the last checkpoint for which generating the adjoint
+ --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
+ --->>> by default.
+ --->>> Future checkpoints will ommit this flag by default.
+ o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
+ o pkg/grdchk: Add gradient check to etan0 perturbations.
+ o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
+ o pkg/autodiff: more flexibility in zeroadj.
+   model/src: modifying do_oceanic_phys.F accordingly.
+ o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
+ o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
+   special setup of gmredi for which the adjoint is stable
+   enough for parameter optimization.
+ o bridging the gap between eddy stress and GM.
+   -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
+       along with a change in CPP option (now ALLOW_EDDYPSI).
+   -> when using GM w/ GM_AdvForm:
+       The total eddy streamfunction (Psi = eddyPsi + K x Slope)
+       is applied either in the tracer Eq. or in momentum Eq.
+       depending on data.gmredi (intro. GM_InMomAsStress).
+   -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
+   The key modifications are in model/src/taueddy_external_forcing.F
+   pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
+ checkpoint59r
+ o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
+   from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
+   fix option to read coriolis(@ cell-corner) from files with CS-grid.
+ o pkg/mnc: add some attributes to standard 1D-coordinate variables
+ o pkg/diagnostics: enforce missing_value attribute for scalar variables at
+   mass points, when using mnc for output
+   - add runtime parameter (missing_value, missing_value_int) to override
+     default (which is the value of getcon('UNDEF'))
+ o pkg/mnc: prepare mnc for the actual use of missing values with the
+   diagnostics package: small fix in mnc_cw_readwrite.template and more
+   initialisation of never used fields
+   - replace mnc_common.h and mnc_id_header.h with corresponding upper case
+   versions
+ o pkg/thsice/thsice_ini_vars.F added default initial values so that
+   thermodynamics sea ice solver does not blow up when some initial fields
+   are missing.
+ o move from external_forcing_surf.F to ini_forcing.F
+   the p-coord. hack consisting in using pLoad to set phi0surf ;
+   update output of tutorial_global_oce_in_p (affected @ truncation level).
+ o Freshen up a bit hs94.1x64x5, notably:
+   remove rotationPeriod and tRef=5*0. (adjoint only), and add
+   exactConserv=.TRUE.
+ o pkg/generic_advdiff:
+   change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
+   applies to files where Temperature & Salinity 2nd Order moments are used.
+ o pkg/ptracers: add second-order moment advection schemes (80 and 81);
+   this uses a dynamically allocated internal state data structure
+   (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
+   and requires a fortran 90 compiler
+ checkpoint59q
+ o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
+    (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
+ o Refresh tutorial_global_oce_biogeo, notably:
+   - change bathymetry (put back seamounts in ACC, use hFacs)
+   - change EOS (POLY3 --> JMD95Z)
+   - use Bryan-Lewis vertical diffusivity
+   - use multidimensional advection
+   - remove old virtual virtual in dic pkg, now done through ptracer pkg
+   - change a couple of parameters in dic pkg
+ o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
+ o pkg/obcs: change default to OBCSfixTopo = .true.,
+   - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
+   - replace "debugMode" with "debugLevel .GE. debLevB"
+ o implementation of TAF directives for gchem,cfc,dic
+ o remove "exp5" (replaced by tutorial_deep_convection).
+ o pkg/obcs: add code to fix topography gradients normal to open boundaries;
+   this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
+   the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
+   --> changes results in exp4, seaice_obcs
+ o tutorial_deep_convection :
+   update the set-up and increase resolution and domain size ; start
+   from pseudo initial conditions = output at t=120mn in order to see
+   something happening when running testreport.
+ o pkg/seaice: add os7mp as an advection scheme
+               add check for advection schemes
+               add a flag for restoring T and S underneath sea ice
  o pkg/my82: add netcdf-support and diagnostics
  o thsice pkg:
-   - Now hsMax limits snow heitght by turning it into ice following
+   - Now hsMax limits snow height by turning it into ice following
      flooding scheme (and now conserving energy)
    - Slight rewriting of the formula in thsice_calc_thick.F
    - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
-     --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
+   --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
  checkpoint59p
  o gchem / dic / cfc :
-Line 2070 
 o add two new packages
+Line 2666 
 o add two new packages
    - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
    - these scheme operate in a similar manner as KPP (without ghat, of
      course), however there is only one diffusivity that is used for both
-     temperature and salinity (and passive tracers)�
+     temperature and salinity (and passive tracers)
  o add offline package
  o add "verification/dic_example" which contains a dic-gchem-ptracer setup
    provided by Stephanie Dutkiewicz

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