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revision 1.47 by heimbach, Tue Aug 21 16:38:41 2001 UTC revision 1.343 by edhill, Fri Sep 10 12:26:41 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o overhaul of IO so that we now have flags for MDSIO and/or MNC
7      - all verification tests compile and run with linux_ia32_g77
8      - defaults are compatible with current input files--nothing
9        should change if you were not previously using MNC
10      - MNC output has been added in numerous places (eg. timeave)
11        but there are still a few writes not yet do-able with MNC
12        (this is in progress)
13      - flags now allow for either/or/both use of MDSIO and MNC and
14        documentation will soon follow
15      - numerous small formatting cleanups for ProTeX
16    o add version info (via BUILD_INFO.h) to MNC and stdout
17    
18    checkpoint54e_post
19    o add two new packages
20      - pp81 (Packanowski and Philander, 1981), Richardson number and
21        stratification dependent mixing
22      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
23      - these scheme operate in a similar manner as KPP (without ghat, of
24        course), however there is only one diffusivity that is used for both
25        temperature and salinity (and passive tracers)ç
26    o add offline package
27    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
28      provided by Stephanie Dutkiewicz
29    o genmake2: add ability to search for C compilers and cleanup test output
30      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
31    
32    checkpoint54d_post
33    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
34    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
35      leading to additional shift by 5 days each year of integration
36       (i.e. leading to considerable offset over the years)
37    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
38    o start with no AB and no initial filtering (staggerTimeStep):
39      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
40    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
41      (external loading & cpl import/export stay in forward_step.F)
42    o update coupling interface to work with new staggerTimeStep
43    o change MDSIO ptracers_pickup.
44    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
45    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
46    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
47    
48    checkpoint54c_post
49    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
50      this affects (truncation error) output.txt of test-exp:
51       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
52    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
53    o change Qnet to always be the net heat flux, (+upward).
54      affects (truncation error) output of natl_box exp.: updated
55    o define the max number of passive tracers in PTRACERS_SIZE.h
56    o start to test mnc routinely in exp0
57    o add sea-ice loading (sIceLoad) as a new forcing field.
58    
59    checkpoint54b_post
60    o add testreport "-j JOBS" option for parallel builds (tested and pretty
61       impressive on Altix and Opteron systems)
62    o diagnostics can now write NetCDF files through the mnc package
63    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
64    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
65    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
66      affects (truncation error) output of lab_sea & natl_box exp.: updated
67    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
68    
69    checkpoint54a_post
70    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
71    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
72    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
73    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
74      + internal_wave (shift in writing cg2d_ini_res)
75    checkpoint54a_pre
76    
77    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
78      - modified verification/lab_sea and natl_box_adjoint accordingly
79    
80    checkpoint54
81    checkpoint53g_post
82    o prepare splitting of thermodynamics: store convect.counter in common block
83    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
84      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
85    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
86    o new parameter "nShapS": allow to treat differently S from T (nShapT)
87    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
88    o restore adjointability
89    
90    checkpoint53f_post
91    o modifications that affect AIM experiment results (update output.txt):
92      - no advection of S at top interface Nr (pkg/generic_advdiff)
93      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
94    o AIM pkg:
95      - include stability function into surf.Flux derivative relative to Tsurf
96      - calculate clear-sky radiation & surface temp. change (for diagnostics)
97    
98    checkpoint53e_post
99    o merged cylindrical coord configuration
100    o added rotating_tank experiment
101    checkpoint53e_pre
102    
103    checkpoint53d_post
104    o faulks upgraded: re-generate output.txt that have changed:
105       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
106    o Added Bryan and Lewis, 1979, vertical diffusivity profile
107    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
108    o added Sadourny discretization of Coriolis
109      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
110      - re-enabled use of omega3 (useAbsVorticity)
111    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
112      vector-invariant equations
113      - note: does *NOT* yet use same variable visc. for no-slip BC's.
114    o recoded the lateral boundary conditions for non-hydrostatic w, this time
115      hopefully without new bugs
116      - still to do: biharmonic friction for non-hydrostatic w
117    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
118    o regenerated output for global_ocean_ebm (using -ieee)
119    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
120      of mom_common/
121      - simple re-arrangement of instructions within computing loop
122    checkpoint53d_pre
123    
124    checkpoint53c_post
125    o new version of coupler for AIM+thSIce and Ocean models
126     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
127     - land: change Evaporation of snow
128     - aim with thSIce: fix bug in snow-precip.
129    o changes to calc_gw.F
130     - bug fix for w^2 term near the bottom boundary
131     - (hopefully) improve the lateral slip boundary condtions for use with
132        partial/looped cells
133      - because the bug fix changes two verification experiments anyway (exp5
134        and plume on slope), change the lateral boundary condition from half slip
135        to the value of no_slip_sides
136    o ebm package wasnt quite up to the parallel task. Fixed that.
137    o Adjoint of EBM package + verification
138      * TLM OK
139      * ADM not sufficient accuracy yet (needs further testing)
140    
141    checkpoint53b_post
142    o Commiting new energy balance model to repository
143      * package is pkg/ebm
144      * verif. is verification/global_ocean_ebm
145      * references are in ebm_driver.F
146    C      * X. Wang, P. Stone and J. Marotzke, 1999:
147    C        Global thermohaline circulation. Part I:
148    C        Sensitivity to atmospheric moisture transport.
149    C        J. Climate 12(1), 71-82
150    C      * X. Wang, P. Stone and J. Marotzke, 1999:
151    C        Global thermohaline circulation. Part II:
152    C        Sensitivity with interactive transport.
153    C        J. Climate 12(1), 83-91
154    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
155    C        Destabilization of the thermohaline circulation
156    C        by atmospheric eddy transports.
157    C        J. Climate 7(12), 1870-1882
158    o Will need long integration testing.
159    checkpoint53b_pre
160    
161    o created pkg/mom_common in preparation for variable viscosity code
162    o renamed and split ini_mnc_io
163    o pkg/land: only liquid water can diffuse or run-off
164    o AIM using land: soil wetness availability account for snow
165    o added printMapIncludesZeros to EEPARMS namelist
166    
167    checkpoint53a_post
168    o restore TAMC compatiility for exf_constants.h
169      (no usage of _d in .h)
170    o Additional storing in KPP in an attempt to fix
171      TAMC problem with adjoint of KPP code.
172      (no success...)
173      Identical code works fine with TAF.
174    o Fixed verification/natl_box_adjoint experiments.
175      Initial conditions for Experiments 4 and 5 are now
176      set to "SEAICE_initialHEFF=0", which is more reasonable,
177      and hence gives results closer to that of Experiment 2.
178      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
179    
180    checkpoint53
181    o stable checkpoint with up to date adjoint
182      TLM tests only run for 1st grdchk at the moment. Its unclear if
183      this is a code problem or a problem with resetting code for g_
184      variables that is being autogenerated wrong.
185      Otherwise:
186       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
187       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
188         are both still in chaos following their security messes.
189    
190    checkpoint52n_post
191    o various build (mostly genmake2) changes including:
192      - ability to build/run more easily within Cygwin and MacOS X
193      - more complicated Makefiles with a stronger dependence on Gnu Make
194    o pkg/seaice modifications
195      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
196        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
197        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
198      - changed proxy for geostrophic velocity and updated
199        verification/lab_sea/results/* accordingly
200      - removed ADI dynamic solver from pkg/seaice
201      - replaced all occurrences of 1/CSTICE or 1/CSUICE
202        they caused a segmentation fault under certain circumstances
203      - removed unused field WATR
204    o bug fix in exf-package:
205      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
206         now reflect that.
207    o small fixes in the cal-package:
208      - set reference date to first of January for the 'model'-calendar
209      - failing of cal_CheckDate in cal_FullDate now actually results in a
210        warning
211    o small modifications in exf-package to increase flexibility:
212      - change climtempfreeze from a constant to a runtime parameter that
213        is specified in data.exf_clim (default = -1.9)
214      - introduce runtime parameter windstressmax (default = 2.0) that is
215        specified in data.exf
216    o fix in pkg/thsice:
217      - update Evap (Tsf changes) to be consistent with Latent heat flux
218      - maintain snow precipitation unchanged (even if Tsf >=0).
219     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
220    
221    checkpoint52m_post
222    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
223      this does not change any of the results, because myIter=0 in swfrac always
224      lead to jwtype=2 (the default anyway), but the call makes little sense
225      as a default
226    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
227    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
228      atmospheric model (AIM) to use it ; add a "slab ocean" component.
229    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
230    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
231    o extending useSingleCpuIO option to work with new exch2 I/O format
232      - old-style, missing-tile I/O is still accessible by defining CPP
233        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
234    o monitor package can write to NetCDF files and/or STDOUT
235    o fix re-definition bug in MNC_GRID_INIT_ALL()
236    o doc/api_reference added
237      - a framework for building an API Reference Manual using all
238        the "protex" comments embedded in the code
239      - see pkg/generic_advdiff, pkg/mnc for examples
240    o MNC:
241      - make myThid the last argument for all subroutines
242      - new default for the grid files: NO halos
243      - add useMNC and other run-time flags
244      - separate per-file-group handling of the unlimited dimension
245      - early initialization of MNC w/ flags read at the eeboot stage
246        and lookup tables set in initialize_fixed
247      - write all MNC output to a freshly-created directory
248    o thermodynamics sea-ice (thsice) is now tested with testreport.
249    o test exp. advect_cs: use the standard cs32 grid ; update output.
250    o Added functionality to grdchk:
251      pick global i,j,k position (or nearest wet) where to perform check.
252    
253    checkpoint52l_post
254    o new land formulation:
255      a) use ground enthalpy as prognostic variable to ensure exact
256         energy conservation.
257      b) account for water temperature and for latent heat of freezing
258         in all processes (rain, run-off, ground storage)
259      c) compute surface and ground temperature implicitly.
260    o aim_v23 modification for new land model:
261      a) Treat separately land / ocean / sea-ice surface fluxes
262         to allow implicit computation of land & sea-ice surface temp.
263      b) add snow precipitation.
264    checkpoint52l_pre
265    
266    o fix problem (when 1 tile is empty) in min/max monitor.
267    o fix bug in timeAve (u,vZetatave in common block)
268    o no restoring terms under ice for pkg/seaice
269    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
270    o bug fix for pkg/seaice pickups
271    o change MNC call locations and add coordinate attributes
272    o mask vorticity at the corner ; affects global_ocean.cs output
273    o fix ini_curvilinear_grid ; test CS experiments with mpi
274    o aim.5l_cs: modify sea-ice fraction input file ; update output
275    o exf: Adding simple range check routine for exf fields after read
276    
277    checkpoint52k_post
278    o removed top-level directory "diags"
279      - we migrated these functions to pkg/timeave a long time ago
280    o fixed bug introduced in pkg/monitor
281    o accuracy ctrlprec = 32 insuffient for gradient checks using
282      averaged fields (I/O via cost_averages)
283      -> use ctrl.h in active_file*.F to control I/O precision.
284    o paramter list of CALL ADTHE_MAIN_LOOP
285    o added initial do_the_model_io to ecco
286    o set all ...Freq to zero after cost_final
287      taveFreq, dumpFreq, pChkptFreq
288    o MAIN and ECCO differentiability restored
289    
290    checkpoint52j_post
291    o fix nchklev in tamc.h for global_ocean...
292    o Bringing flow and store directives up-to-date
293    o Really weird thing!
294      call do_the_model_io from the_main_loop with parameters
295      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
296      TAF places a faulty re-call of initialise_varia
297      after cost_final call which should not be there!
298    checkpoint52j_pre
299    
300    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
301      error messages
302    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
303    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
304      debug output
305    o modfied mdsio_writefield.F to handle non-global files under exch2
306    o update AIM Cubed-Sphere exp (aim.5l_cs):
307      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
308    o update AIM Equatorial Channel exp:
309      use standard aim_v23 pkg and change the SST fields to be more realistic.
310    o globalFile now works with exch2
311    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
312      mon_vort3.F to make exch2 friendly with >1 tile per cube face
313    o limit timeave output for hi-res integrations
314    
315    checkpoint52i_post
316    o removed CPP_EEOPTIONS.h from verification/*/code
317    o updated the tiling for global_ocean_pressure
318    checkpoint52i_pre
319    
320    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
321      the old pkg/aim).
322    
323    checkpoint52h_pre
324    o shortened offending lines in exch2_send_rx?.template
325    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
326    o genmake2: add build & execute test for NetCDF code
327    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
328      old grid files, moved CPP_EEMACROS.h to pkg/exch2
329    o added useSingleCPUIO flag to monitor.F and mon_out.F
330    o added temporary hack for sea-ice dynamics on the cube:
331      metric terms are ignored and it is assumed that
332      there is no sea-ice on cube faces 1, 2, 4, and 5.
333    
334    checkpoint52f_post
335    o added exch2 cube routines to pkg/exch2
336    o modified hs94.cs-32x32x5 to use it
337    o added new grid files to hs94.cs-32x32x5
338    checkpoint52f_pre
339    
340    checkpoint52e_post
341    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
342      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
343    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
344      to work with implicit vertical advection and AB ;
345    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
346    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
347     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
348    checkpoint52e_pre
349    
350    o fix bug in impldiff when Nr=1 or Nr=2.
351    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
352    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
353    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
354      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
355    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
356    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
357    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
358    
359    checkpoint52d_post
360    o re-tiled many expts to allow comparison in multi-processor mode
361      - updated output accordingly
362      - changed hs94.128x64x5 to use intial T from file rather than use the
363        random number generator
364    o add infrastructure in model routines for fizhi and gridalt packages
365    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
366    o changes to permit hi-res, cubed-sphere, configuration
367      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
368      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
369      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
370        of surface winds for the cube
371      (A verification experiment, based on global_ocean.cs32x15, but with
372       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
373       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
374       complete with example surface forcing files and matlab scripts to look
375       at the output and compare it with that of global_ocean.cs32x15.)
376    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
377       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
378       to conform to the common rule.
379    o check-in the first version of the coupler + interfaces for multi-components
380       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
381       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
382       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
383       - ocean and atmos. share the same horizontal grid (no interpolation).
384       - exchanges between component and coupler is done in forward_step
385    o new verification experiment, cpl_aim+ocn:
386       coupled ocean - AIM atmosphere on cs32 grid.
387    
388    checkpoint52d_pre
389    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
390    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
391    
392    checkpoint52c_post
393    o Fixing OPTIONS files for use of exf:
394      - ALLOW_ECCO not needed
395      - ECCO_CPPOPTIONS.h should not be included from
396        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
397        as has been the case in the past
398      - All cal/exf related options are currently set in
399        single header file. Should remain so until we
400        agree on a consistent new policy.
401    o Removed all CPP options for cal package.
402      cal has no more CPP options.
403    o modified STOREs in GAD_ADVECTION
404    o corrected key comp. for passkey
405    
406    checkpoint52b_post
407    o new version: "thsice" of thermodynamic sea-ice pkg:
408     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
409     - modify fluxes but do not change theta directly;
410     - light cleaning of bulk_force pkg (still needed with thsice).
411     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
412       + output_thsice.txt to test thsice & bulk_force pkgs.
413    o put back grid & coriolis monitor output.
414    checkpoint52b_pre
415    
416    o call "do_the_model_io" at the beginning (=> dump initial state)
417    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
418    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
419      (need info on NUMBER_OF_PTRACERS)
420    o missing PTRACERS headers in some routines
421    o default tamc.h in pkg/autodiff supposed to crash
422      to ensure proper customization
423    
424    checkpoint52a_post
425    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
426      - moved surfaceTendencyTice from pkg/seaice to main code
427      - subroutine FREEZE_SURFACE now limits only surface temperature
428        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
429        => new output.txt for global_ocean.cs32x15 & global_with_exf
430      - keep the old version of FREEZE for backward compatibility;
431        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
432      - corresponding modifs for TAF directives
433    o added surface flux output variables to TIMEAVE_STATVARS
434    o time-averaged output for pkg/ptracers
435    o fix problem with ECCO-related divided adjoint
436      snapshot file was missing some ad-variables,
437      but no warning issued by TAF
438    
439    checkpoint52a_pre
440    o some bug fixes for #undef REAL4_IS_SLOW
441    
442    checkpoint52 = ecco_c52_e35
443    o after testing adjoints of checkpoint51u_post
444    
445    checkpoint51u_post
446    o this is the post-merge tag of the ecco-branch
447      (needs another clean checkout and re-testing)
448    o various natl_box_adjoint configs and results
449      but no input fields
450    o obcs adjoint not yet merged!
451    o adding ECCO global 1x1 and 2x2 degree configs
452    o updated/extended some store directives for seaice
453    o pkg/ecco now containes ecco-specific part of cost function
454    o top level routines the_main_loop, forward_step
455      supersede those in model/src/
456      previous input data.cost now in data.ecco
457      (new namelist ecco_cost_nml)
458    o in ctrl/ cleaned some cross-dependencies and updated CPP options
459    
460    checkpoint51t_post
461    o this is the pre-merge tag of the ecco-branch
462    
463    checkpoint51s_post
464    o cleanup: removed various obsolete #define-s
465    o pkg/grdchk
466      - renamed 'ph-grd 3' to 'grad-res'
467      - merged from ecco-branch
468        (remaining bug fixes for obcs gradient checks)
469      - additional high-precision output for testreport
470        (grep for 'precision_grdchk_result')
471    
472    checkpoint51r_post
473    o cleaned up or removed CPP_OPTIONS.h files
474    o updated results for some of the tests to reflect the new
475      optfiles (-ieee: -O0 instead of -O3)
476    
477    checkpoint51q_post
478    o cd_code:
479      - moved cd_scheme.F -> cd_code_scheme.F
480      - separate read_checkpoint from cd_code_ini_vars.F
481      - separated cd_code part from write_checkpoint
482      - updated AD_SOURCE, generated .flow
483      - added CD_CODE_VARS.h to the_main_loop
484      - Moving cd_code specific store dir.s to pkg/cd_code
485    o ctrl package totally restructured
486      - pack/unpack now optional and decoupled from
487        xx_/adxx_ I/O
488      - ctrl_pack/unpack cleaned
489        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
490      - confined inclusion of AD_CONFIG.h to where necessary.
491    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
492    
493    checkpoint51p_post
494    o create initial cd_code package
495      - WARNING: the initialization of fields within packages
496        is broken because INI_FIELDS (where READ_CHECKPOINT is
497        called) is called *before* PACKAGES_INIT_VARIABLES.
498        This seems to be backwards since
499        1) its important to initially zero the entire field including
500           the "halo" region
501        2) zeroing needs to be done *before* reading pickup info
502           and the pickup call might or might not happen in any
503           particular run
504      - this needs an overhaul for R2
505    o cleanup verification/*/code/GMREDI_OPTIONS.h
506    o cleanup testreport
507    
508    checkpoint51o_post
509    o bringing AD-related verif's up to date with genmake2
510      - carbon/
511      - global_ocean.90x40x15/
512      - hs.94.1x64x5/
513      - (front_relax/ )
514    o (more) consistent directory structure for AD-related verif.'s
515    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
516    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
517    o bug fix in find_alpha.F for MDJWF:
518      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
519        change rho -> rho-rhoConst
520      - replace call find_rho to find_rhonum
521    o initialisation of rFlx extended to full array (required by TAF)
522      and shifted to thermodynamics
523    o removed PTRACERS.h in ptracers routine
524    o added surfacetendencyPtr to S/R parameter list pracers_forcing
525    o Correcting initialisations for fVerU, fVerV.
526    o helping TAF to recognize dependency on kUp for
527      fVerU, fVerV
528    o Replacing delZ by delR in pkg/ctrl/
529    checkpoint51o_pre
530    
531    o undid all of cp51 pending some cleanups and discussion
532    o added the [#include "AD_CONFIG.h"] statement to all files that need
533       it for adjoint/tl #defines
534     o re-worked the build logic in genmake2 to support AD_CONFIG.h
535     o removed tools/genmake since it no longer works
536    
537    checkpoint51n_post
538    o modifications to make FREEZE flux visible to pkg/kpp
539      - moved surfaceTendencyTice from pkg/seaice to main code
540      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
541      - subroutine FREEZE now limits only surface temperature
542        (this means new output.txt for global_ocean.90x40x15,
543         global_ocean.cs32x15, and global_with_exf)
544    o added surface flux output variables to TIMEAVE_STATVARS
545    
546    checkpoint51n_pre
547    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
548    o added [#include "AD_CONFIG.h"] to all files that use the following
549      defines:
550      - ALLOW_ADJOINT_RUN
551      - ALLOW_TANGENTLINEAR_RUN
552      - ALLOW_ECCO_OPTIMIZATION
553    
554    checkpoint51m_post
555    o incorporating changes to get TAMC/TAF working in genmake2
556      - added new TAMC/TAF targets to the Makefile
557      - various cleanups related to package handling
558      - these changes should have no impact on the forward model
559    
560    checkpoint51l_post
561    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
562     - faster algorithm for cal_addtime.F
563     - higher precision arithmetic, where needed
564     - pkg/exf *startdate variables changed from calendar date to
565       model integration time
566    
567    checkpoint51l_pre
568    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
569    o enable to apply restoring on S & T only in a latitude band.
570    o update output (external_forcing_surf modif. change truncation errors)
571       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
572    
573    checkpoint51k_post
574    o change default to: useNHMTerms=.FALSE.
575     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
576       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
577     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
578        exp1, ideal_2D_oce
579     - change data file of oceanic exp (leave the results unchanged for now)
580       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
581    o set gravitySign automatically according to the vertical coordinate used
582      (and change sign: back to "logical" value: +1 when R increases downward)
583    o added an include barrier to the default CPP_OPTIONS.h and
584      removed the #include "PACKAGES_CONFIG.h" from it
585    o fix a bug in mom_fluxform (from chk51j_post)
586    
587    checkpoint51j_post
588    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
589    o adjusted some flow directives (dynamics, thermodynamics)
590    o added cubed-sphere case to test cost function
591    o heckpoint_lev?_directives.h now include
592      pkg-specific directives, whenever those are enabled.
593    o Moving pkg-specific flow directives to corresponding pkg
594      Moving pkg-specific differentiation list to corresponding pkg
595      Moving pkg-specific checkpoint-lev storing to corresponding pkg
596      ---> conventions are
597           - pkg_ad.flow
598           - pkg_ad_diff.list
599           - pkg_ad_check_lev?_dir.h
600    
601    checkpoint51i_post
602    o merge of the branch-genmake2
603      - knowingly breaks the older genmake
604      - automatic generation of all ALLOW_${PKG_NAME} defines
605      - new testreport supersedes older testscript
606    o large number of package inclusion and header cleanups
607    checkpoint51i_pre
608    
609    o new output for adjoin of global ocean vector invariant
610    o fix for checkpoint of thermodynamic seaice and bulk_force
611    o Steph gchem various cleanups
612    
613    checkpoint 51h_pre
614    o fixed some single quotes
615    o modify gchem pkg to be more versatile
616    o modifications to clean up dic pkg
617    o add pkg/cfc
618    
619    checkpoint51g_post
620    o provide links for ARPACK and ADM*TLM
621    o start removing verification/vero/
622    o update AD-related stuff
623      (in particular some IF-statements in model/src/ routines)
624    o adding to verification/global_ocean.90x40x15/ adjoint of
625      vector invariant setup
626    
627    checkpoint51f_post
628    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
629    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
630      of tracer Green's fucntions for ocean inversion project.
631    
632    checkpoint51f_pre
633    o Added on-the-fly spatial interpolation capability
634        "USE_EXF_INTERPOLATION" to pkg/exf.
635      - This is a temporary Cartesian-grid hack until
636        the super-duper ESMF coupler becomes available.
637      - See verification/global_with_exf/README for usage example.
638      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
639        flags and modified pkg/seaice accordingly.
640    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
641        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
642        non-local transport term.
643    
644    checkpoint51e_post
645    o pkg/mom_vecinv:
646      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
647      - add time-ave diagnostic of vorticity advection.
648    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
649    o atmospheric geopotential: - include water vapor effect;
650                                - use p^kappa in p* scaling.
651    o land pkg: read initial state from files.
652    o AIM : add stratospheric drag in the upper level
653    
654    checkpoint51d_post
655    o change function ILNBLNK (=> last non-blank char.) to return zero
656      (instead of the string length) when the string. char is empty
657    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
658    o modif's to restore TAMC compatibility
659      - avoid "_d" constructs in PARAMETER declarations
660      - avoid interrupting lines by comment lines
661    o Use cluster local disks for purely local I/O
662      vs. globally visible disks needed for ctrl stuff
663      (merged from ecco-branch)
664      - new active_file_loc... and mdsio_..._loc routines
665      - affected packages: autodiff, ctrl, grdchk, mdsio
666    
667    checkpoint51c_post
668    o introducing integer flag debugLevel
669      - debLevZero: suppress all output
670      - debLevA: standard
671      - debLevB: equivalent to current debugMode=.TRUE.
672    o introducing pathname variable mdsioLocalDir for mdsio
673      that can be specified at runtime
674      (relevant for cluster I/O to local disk)
675    `
676    >>>checkpoint51b_post
677    adjoint of ptracers
678    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
679    o extended state in checkpoint_lev?, etc.
680    o alternative ctrl/cost with tr1 or ptracer
681    o new comlev1_bibj_ptracers
682    o new ptracers.flow
683    o made ptracers_forcing same as external_forcing_s
684    o added verification for adjoint with ptracers
685      - adm. grdchk fail so far
686      - tlm. grdchk OK
687      - checked tapelev/comlev recomputations: OK
688    <<<checkpoint51b_pre
689    
690    checkpoint51a_post
691    o added code for biogeochemistry package
692      - new pkgs: dic, gchem
693      - new subroutine in ptracers
694    o modify code for biogeo packages
695      - in model/src and pkg/ptracers
696    
697    checkpoint51
698    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
699      - autodiff, ctrl, exf, grdchk, seaice
700      kept separate packages
701      - cost, ecco, obcs
702    o updating verification/internal_wave, verification/lab_sea
703      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
704    
705    checkpoint50i_post
706    o Preparing next differentiable checkpoint and sync
707      of MAIN vs. ecco-branch
708      - 1st step: this one is differentiable
709      - 2nd step: next(! not this) checkpoint will have updated packages
710                  from ecco-branch)
711    
712    checkpoint50h_post
713    o new package "land": provide surface BC for AIM.
714    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
715    o AIM: use true log-P extrapolation for near surface temp (= as in
716        F.Molteni paper) ; update aim.5l_cs output.
717    o New variable in PARM03 for more flexible pickups
718    o somewhat cleaned package initialisation sequence for
719      ctrl/ cost/ ecco/ in packages_... routines
720    
721    checkpoint50g_post
722    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
723      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
724      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
725        made the default because of faster convergence than ADI
726    
727    checkpoint50f_post
728    o exf totally restructured
729      - replaced all exf_set_ routines by one generic exf_set_gen.F
730        and made sure it's still differentiable
731      - split exf_getffields.F into new exf_bulkformulae.F
732      - exf_inscal_/exf_outscal_ suffixes consistent with field names
733      - updated adjoint/makefile and relevant verif. accordingly
734    
735    checkpoint50f_pre
736     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
737          + change Evap over land. (update aim.5l_cs output)
738     o added missing .cvsignores and made uniform across expts
739     o changed configuration of tidal_basin_2d expt
740     o added pkg/debug functions for tracing code in fatal crashes
741     o tidied pkg/monitor to use MONITOR_OPTIONS.h
742     o new fn in pkg/monitor to stop model if solution grows too big
743     o removed lots of single quotes from comments
744    
745    checkpoint50e_post
746    o make KPP work with PTRACERS
747     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
748       nearly a copy of kpp_transport_s
749     - there is no analogue to SurfaceTendencyS, so I have to use
750       gPtr(of the surface layer) instead
751    o add a new platform SunFire+mpi (SunFire 15000) to genmake
752    checkpoint50e_pre
753    
754    checkpoint50d_post
755    o change kpp output from multiple-record state files to single-record state
756      files analogous to write_state.F
757    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
758      analogous to the cg2d-related output.
759    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
760      so that writing to internal file fn (with length 512) fails.
761    checkpoint50d_pre
762    
763    checkpoint50c_post
764    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
765    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
766    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
767    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
768    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
769    
770    checkpoint50c_pre
771    Merging from release1_p13:
772    o bug fix for pkg/seaice dynamic solver
773    o Added SEAICE_initialHEFF to pkg/seaice
774    
775    checkpoint50b_post
776    o store u*,v* in gU,V instead of in guNm1,gvNm1
777    o in order to put the momForcing out of the Adams-Bashforth:
778      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
779      to timestep.F
780    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
781    o re-generate output for highly sensitive test-exp:
782       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
783    
784    checkpoint50b_pre
785    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
786    o corrected CPP option mismatch in exf_Bulk... functions for case
787      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
788    
789    checkpoint50a_post
790    o Bug fix for merging between c50 and KPP.
791      ikey was passed from thermodynamics to kpp_calc via
792      common block rather than being recomputed in kpp_calc,
793      in contradiction with new key itdkey.
794      New key ikppkey created, and tamc.h headers updated.
795    
796    checkpoint50
797    - 2nd step of merge with ecco-branch:
798      merge changes in ecco-branch back into main trunk
799    - bug fix in find_alpha
800    - more storing in gmredi_calc_tensor.F, kpp_routines.F
801    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
802    - merged some sliced AD support routines
803    
804    checkpoint49
805    merged from ecco-branch:
806    o exf:
807      - Enable initialisation of forcing fields to constant
808        (runtime) values.
809      - in exf_getffields.F
810        Reduce i-/j-loop to interior domain, discarding overlaps.
811        That also fixes wrong TAF-key computations for key_1, key_2
812        with bulf formulae.
813      - exf_init.F modify #ifdef for exf_init_evap
814      - exf_getffieldrec.F, ctrl_getrec.F
815        The following INT-usages are not safe:
816          fldsecs  = int(fldsecs/fldperiod)*fldperiod
817          fldcount = int(fldsecs/fldperiod) + 1
818        and were modified.
819    o autodiff: checkpoint_lev...
820      - updated storing for bulk formulae (some arrays were missing)
821      - added state for seaice package
822      - synchronized with main branch
823    o DIVA:
824      Modif.s in
825      - the_main_loop.F
826      - the_model_main.F
827      and added cost_final_restore.F cost_final_store.F
828      o With these changes, it is possible to fully separate
829        the first forward run to compute the cost function (mdthe_main_loop)
830        and adjoint runs over individual DIVA intervals (adthe_main_loop)
831        into separate model executions.
832        This enables better tuning of DIVA to given queue sizes.
833      o Loss of cost function value in consecutive DIVA runs is
834        fixed by storing to 'costfinal' file.
835      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
836        beginning/end of adjoint integration is accounted for.
837      The current changes apply to TAF-1.4.26.
838      TAF has one remaining bug, requiring one manual change
839      (see MITgcm manual).
840    o cal: synchronized between MAIN and ecco-branch
841    
842    checkpoint48i_post
843    o Changes to restore differentiability of code w.r.t. previous tag
844      (mostly adding new routines to make list and replacing
845      pressure by totPhiHyd).
846    o Updated and merged grdchk package
847      - has both ADM and TLM checks
848      - works for single- and multi-proc.
849      - output cleaned
850      - worked successfully for parallel DIVA
851    o genmake:
852      - Adding -platform=SP4
853      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
854    o Modif. for DIVA:
855      ctrl_unpack should not be called in intermediate DIVA interval.
856      (similar thing would apply for active files such as
857      tbar, sbar, psbar, which should not be reinitialised;
858      only relevant for ecco-branch)
859    
860    checkpoint48h_post
861    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
862    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
863    o Added SEAICE_initialHEFF to pkg/seaice
864    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
865    
866    checkpoint48g_post
867    --- EOS:
868    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
869      store total Potential in totPhyHyd for diagnostics & EOS.
870    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
871    --- Pressure/geopotential gradient:
872    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
873    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
874      ( changes results of global_ocean_pressure )
875    o NLFS + z-coord.: add eta*Rho' contribution.
876    o accurate phiHyd when using interface-W at the middle between 2 centers
877     ( changes results of ideal_2D_oce )
878    o includes r* 2nd term in potential gradient.
879    
880    checkpoint48f_post
881    Merging from release1_p12:
882    o Modifications for using pkg/exf with pkg/seaice
883      - improved description of the various forcing configurations
884      - added basic radiation bulk formulae to pkg/exf
885      - units/sign fix for evap computation in exf_getffields.F
886      - updated verification/global_with_exf/results/output.txt
887    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
888      (SBO) core products, including oceanic mass, center-of-mass,
889      angular, and bottom pressure (see pkg/sbo/README.sbo).
890    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
891      to avoid negative values in shallow regions.
892      - updated verification/natl_box/results/output.txt
893      - updated verification/lab_sea/results/output.txt
894    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
895    o Added useSingleCpuIO option (see PARAMS.h).
896    o Updated useSingleCpuIO option in mdsio_writefield.F to
897      work with multi-field files, e.g., for single-file pickup.
898    o pkg/seaice:
899      - bug fix in growth.F: QNET for no shortwave case
900      - added HeffFile for specifying initial sea-ice thickness
901      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
902    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
903      kpp_transport_t.F, forward_step.F, and the_main_loop.F
904    o pkg/seaice:
905      - adjoint-friendly modifications
906      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
907    
908    checkpoint48e_post
909    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
910    o dynamics: change definition of computational domain & adapt mom_fluxform
911      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
912    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
913        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
914        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
915        global_ocean.90x40x15 global_with_exf global_ocean_pressure
916        inverted_barometer solid-body.cs-32x32x1
917      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
918    
919    checkpoint48d_post
920    o in preparation for r*:
921     a) use pre-computed gradient of hydrostatic potential:
922        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
923     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
924        => affects results of glob_oce_pressure (different truncation error)  
925      update output.txt of ideal_2D_oce & global_ocean_pressure
926    
927    checkpoint48d_pre
928    o in preparation for r*:
929      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
930      pass the 2 comp. of the grad. as arguments to momentum S/R.
931      but for the moment, only used if it does not change the results.
932    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
933    
934    checkpoint48c_post
935    Modifications in treatment of initial flux forcing controls
936    to avoid extra storing of flux fields.
937    
938    checkpoint48c_pre
939    o Added tidal_basin_2d experiment (currently 1D!)
940    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
941    
942    checkpoint48b_post
943    o r* coordinate added in #ifdef NONLIN_FRSURF block.
944     (modification to pressure gradient not yet implemented)
945    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
946      (for U & V) that are used for vertical advection of momentum.
947    
948    checkpoint48a_post
949    o In preparation for r*, use temp. array to compute vertical transport
950       in flux-form momentum pkg. => change results of few test-exp.
951      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
952                        lab_sea, natl_box & plume_on_slope
953    
954    checkpoint48
955    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
956    
957    checkpoint47j_post
958    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
959    o moved adexch from forward_step to addummy_in_stepping
960    o added exch in ctrl_map_...
961    o aveFreq.=0. at end of cost_final to avoid overwrite in
962      reverse checkpointing loop
963    o Yet more changes in gmredi:
964      * adgmredi_calc_tensor
965        avoiding all recomputation of gmredi_slope_limit
966      * adgmredi_x/y/rtransport
967        added flag for excessive storing to avoid recomp. of
968        u/v/rtans, dTdx/y/z
969        -> this is not really necessary and very memory-consuming
970      * adgmredi_slope_psi:
971        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
972      * gmredi_slope_limit
973        re-activated full calculation of taperfct for case 'ac02'
974    o updating verification/ adjoints of carbon, global_ocean.90x40x15
975    
976    checkpoint47i_post
977    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
978    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
979      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
980    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
981    o gmredi: fix few bugs.
982    
983    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
984    This will be a good checkpoint to plug into the ecco-branch.
985    o few modif.'s to get latest version adjointed
986      (mainly kick out code in ini_linear_phisurf)
987    o modif's to run adjoint with exactConserv
988    o case GM_BOLUS_ADVEC should be cleaned
989      S/R gmredi_slope_psi should be cleaned
990    o verification/carbon now has exactConserv=.TRUE.
991    
992    checkpoint47g_post
993    o time-average AIM output: becomes independent from statvars time-average
994      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
995    o After TAF bug fix:
996      Tested adjoint of gmredi package.
997      Tests were done with checkpoint47 rather than with latest
998      checkpoint47f_post since the latter is broken for the adjoint
999      verification/carbon/ contains both ADM and TLM gradient checks.
1000    Here they are, before they get changed/lost/stolen.
1001    Mostly modif.'s to fix numerical sensitivities.
1002    Gradient checks OK for
1003    - GM_taper_scheme:
1004      * clipping
1005      * ac02
1006      * linear
1007      * glw91
1008      * dm95
1009      * ldd97
1010    - GMREDI_OPTIONS:
1011      * GM_VISBECK_VARIABLE_K
1012      * GM_NON_UNITY_DIAGONAL
1013      * GM_EXTRA_DIAGONAL
1014      * GM_BOLUS_ADVEC
1015    in conjunction with data.gmredi parameters to be checked in
1016    in a few minutes under verification/carbon/code/
1017    
1018    checkpoint47f_post
1019    Merging from release1_p10:
1020    o modifications for using pkg/exf with pkg/seaice
1021      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1022        and SEAICE_EXTERNAL_FLUXES
1023      - pkg/exf CPP options EXF_READ_EVAP and
1024        EXF_NO_BULK_COMPUTATIONS
1025      - usage examples are Experiments 8 and 9 in
1026        verification/lab_sea/README
1027      - verification/lab_sea default experiment now uses
1028        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1029    
1030    checkpoint47e_post
1031    o created a tag prior to creating a branch
1032    
1033    checkpoint47d_post
1034    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1035      at the bottom boundary had an erroneous half slip boundary condition
1036    o added bottom drag and no slip boundary condition capabilities to
1037      oceanic pressure coordinates code
1038    o added new verification experiment global_ocean_pressure, this experiment is
1039      also described in the tutorial section of the manual
1040    checkpoint47d_pre
1041    
1042    checkpoint47c_post
1043    o Added a verification experiment for a global cubed-sphere ocean run
1044      -  verification/global_ocean.cubed32x32x30
1045      -  uses pkg/therm_seaice and pkg/bulk_forcing
1046    
1047    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1048    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1049      when using P-coordinate; only implemented for atmospheric config.
1050    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1051      NOTES: requires option NONLIN_FRSURF to be "#define".
1052    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1053    
1054    checkpoint47b_post
1055    Merging from release1_p9:
1056    o pkg/seaice
1057      - removed GOTO's and added taf directives
1058      - double precision constants to reduce the g77 (Linux)
1059        to F77 (SGI) differences reported in release1_p8
1060    o tools/genmake
1061      - added SGI options
1062    o verification/testscript
1063      - updated to that of checkpoint47a_post
1064    o verification/global_ocean.90x40x15/input/eedata
1065      - modified for SGI f77 compatibility
1066    o verification/lab_sea
1067      - added description of sea-ice model
1068      - added missing matlab routines
1069      - added test of thermodynamics parallelization
1070    
1071    checkpoint47a_post
1072    o new pkg: aim_v23
1073     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1074       for now, keep the same surface forcing as before.
1075     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1076     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1077     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1078    o add diagnostic of surface correction term in monitor output
1079    
1080    o bulk_force and therm_seaice
1081    - Two packages:  bulk_force (Bulk forcing)
1082      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1083    - Earlier integration from Stephaine Dutkiewicz
1084      and Patrick Heimbach.
1085    - Two ifdef statements for compile time,
1086       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1087    
1088    checkpoint47
1089    differentiable version of checkpoint46n_post
1090    o bug fix in quasihydrostaticterms
1091    o * "clean" adjoint code (in terms of extensive recomputations)
1092        can now be obtained for all GMREDI options (i.e. for
1093        - GM_VISBECK_VARIABLE_K
1094        - GM_NON_UNITY_DIAGONAL
1095        - GM_EXTRA_DIAGONAL
1096        - GM_BOLUS_ADVEC )
1097      * However, wrong gradient check problem remains unsolved.
1098      * New CPP options have been introduced for different
1099        tapering schemes
1100    o external_fields_load now part of differentiation list
1101    o pressure needs multiple storing;
1102      would be nice to have store_pressure at beginning or
1103      end of forward_step, e.g. by having phiHyd global (5-dim.)
1104      (NB: pressure is needed for certain cases in find_rho,
1105      which is also invoked through convective_adjustment).
1106    o recomputations in find_rho for cases
1107     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1108    o #define ATMOSPHERIC_LOADING should be differentiable
1109    o ini_forcing shifted to begining of initialise_varia
1110    o Incorporating QNVS line search routines into MITgcm
1111      (this is separate code, and therefore not under pkg)
1112      lsopt/, optim/
1113    o Updated verification/carbon/
1114      - #define GM_VISBECK_VARIABLE_K
1115      - GM_taper_scheme    = 'ldd97'    
1116    
1117    checkpoint46n_post
1118    Merging from release1_p8:
1119    o verification/natl_box:
1120      updating new external_fields_load routine
1121    o New package: pkg/seaice
1122      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1123      The sea-ice code is based on Hibler (1979-1980).
1124      Two sea-ice dynamic solvers, ADI and LSR, are included.
1125      In addition to computing prognostic sea-ice variables and diagnosing
1126      the forcing/external data fields that drive the ocean model,
1127      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1128      The implied surface heat flux is then stored in variable
1129      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1130      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1131      non-local transport term.  Because this call precedes model
1132      thermodynamics, temperature under sea-ice may not be "exactly" at
1133      the freezing point by the time theta is dumped or time-averaged.
1134      N.B.: fairly large differences in accuracy occur across
1135            different platforms/compilers; comparison between
1136            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1137            generated output gives:
1138       T           S           U           V
1139      C D M    c        m  s        m  s        m  s        m  s
1140      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1141      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1142      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1143    
1144      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1145    o GAD:
1146      - generated new common blocks to account for call of
1147        same gad routines with differing traceridentities
1148        (needed to modify tracerIdentity indices in GAD.h)
1149      - generated separate common blocks for case useCubedSphereExchange
1150        (Department of Futurology)
1151      - parameter lists to gmredi_?transport: added tracerIdentity
1152      - added new key indices to tamc.h
1153    o external_fields_load:
1154      - added this routine to TAF list
1155      - needed to make some common blocks global and additional storing
1156        along the same lines as exf package (checkpoint_lev?_directives.h)
1157    o exf:
1158      updated external forcing package
1159      - bug fixes carried over from ecco-branch
1160        (missing OBCS_OPTIONS.h in two routines)
1161      - enable easy to use "no forcing".
1162      - added exf I/O for atmospheric loading
1163      - added exf I/O for runoff data
1164      - transfered scaling between exf <-> MITgcm to exf namelist
1165    o Adding new verification experiment global_with_exf.
1166      This verification experiment is almost identical to the
1167      global_ocean.90x40x15 experiment, except that it uses
1168      the exf (and cal) package instead of the
1169      external_fields_load routine (cf README file).
1170    
1171    checkpoint46m_post
1172    o modified testscript to return -- when there are no lines of "%MON" output
1173    o added new flag "quasiHydrostatic" for QH mode
1174      and new routine quasihydrostaticterms()
1175    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1176      New routine: mom_u_coriolis_nh()
1177    o fixed sign of non-hydrostatic metric terms in u and v equations.
1178      Depend on correct sign of gravitySign.
1179    o added work.pc* to .cvsignore in aim directories using ifc
1180    o introduced flag for controllin non-hydrostatic metric terms
1181    o removed gravitySign from PARM04
1182    o switched to g77/ifc from pgf77 in aim experiments
1183    
1184    checkpoint46l_post
1185    o made convective adjustment work with pressure coordinates:
1186     - changed the direction of k-loop in convective_adjustment.F for the
1187       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1188     - adjusted the reference pressure k-index in convective_adjustment.F
1189     - adjusted the convection condition in convect.F (in analogy to
1190       calc_ivdc.F)
1191     - convective_adjustment no longer computes anything on the halos
1192     - removed the warnings about negative salinity from find_rho.F and
1193       find_alpha.F; instead the new routine look_for_neg_salinity, called
1194       at the beginning of find_rho, find_alpha, and find_beta, does a
1195       check of the entire slice, if CPP-option
1196       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1197    checkpoint46l_pre
1198    
1199    checkpoint46k_post
1200    o fixed the verification/global_ocean.90x40x15 experiment:
1201     - new bathymetry (the world according to A., JMC, and M.)
1202     - new initial fields and forcing fields (*.bin files)
1203     - new POLY3.COEFFS (for the next release one should switch to a full
1204       equation of state: JMD95P or MDJWF)
1205     - fixed several errors and redundancies in the data file
1206     - experiment uses looped cells
1207     - added matlab directory with diagnostic scripts for plotting of output
1208    
1209    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1210     - read AIM physics parameters from a file (data.aimphys)
1211     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1212    
1213    checkpoint46j_post
1214    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1215    o move wVel computation at the end of the time step, in S/R integr_continuity
1216    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1217    o update timeave pkg for wVel diagnostic.
1218    checkpoint46j_pre
1219    
1220    checkpoint46i_post
1221    o Clean up AIM package (and keep the results unchanged):
1222      include CPP_OPTION and use IMPLICT NONE in all routines ;
1223      declare all the variables _RL ; use _d 0 for all numerical constants.
1224      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1225    
1226    checkpoint46h_post
1227    o cleaned up the use of rhoNil and rhoConst.
1228      - rhoNil should only appear in the LINEAR equation of state, everywhere
1229        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1230        and the dynamical equations are all divided by rhoConst
1231    o introduced new parameter rhoConstFresh, a reference density of fresh
1232      water, to remove the fresh water flux's dependence on rhoNil. The default
1233      value is 999.8 kg/m^3
1234    o cleanup up external_forcing.F and external_forcing_surf.F
1235      - can now be used by both OCEANIC and OCEANICP
1236    checkpoint46h_pre
1237    
1238     Added code to convert surface volume flux (fresh water) into
1239     a mass flux when using P coordinates in the ocean (OCEANICP).
1240     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1241    
1242    checkpoint46g_post
1243    o Include a new diagnostic variable phiHydLow for the ocean model
1244      - in z-coordinates, it is the bottom pressure anomaly
1245      - in p-coordinates, it is the sea surface elevation
1246      - in both cases, these variable have global drift, reflecting the mass
1247        drift in z-coordinates and the volume drift in p-coordinates
1248      - included time averaging for phiHydLow, be aware of the drift!
1249    o depth-dependent computation of Bo_surf for pressure coordinates
1250      in the ocean (buoyancyRelation='OCEANICP')
1251      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1252        Theta, Salinity, and Pressure in the parameter list. This routine is
1253        presently contained in find_rho.F. This routine does not give the
1254        correct density for 'POLY3', which would be a z-dependent reference
1255        density.
1256    o cleaned up find_rho
1257      - removed obsolete 'eqn' from the parameter list.
1258    o added two new verification experiments: gop and goz
1259      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1260    checkpoint46g_pre
1261    
1262    checkpoint46f_post
1263    o Enable tangent linear (forward mode) gradient checks:
1264      - extended active file handling to g_... files
1265      - added TANGENT_SIMULATION to theSimulationMode
1266      - extended grdchk package accordingly
1267    o added tangent linear setup in verification/carbon/code_ftl
1268    o added adjoint setup in verification/front_relax/code_ad
1269    
1270    checkpoint46e_post
1271    o Added new equation of state -> MDJWF
1272      - EOS of McDougall et al., 2002, JAOT, submitted
1273      - caveat: the equation of state is only valid for a smaller (more
1274        realistic?) range of values than JMD95P/Z and UNESCO
1275      - added masks to the calculation of pressure in store_pressure
1276      - added more check values for density in check_eos (ini_eos.F), some of
1277        the old check values are out of the range of the MDJWF-eos, so don't
1278        expect perfect matches for those
1279    checkpoint46e_pre
1280    
1281    checkpoint46d_post
1282    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1283      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1284      case of pressure coordinates. eosType='JMD95Z' in
1285      combination with buoyancyRelation='OCEANICP' now causes an error.
1286    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1287      in find_alpha/beta.
1288    checkpoint46d_pre
1289    
1290    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1291      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1292    
1293    checkpoint46c_post
1294    o Changes necessary for ocean in p-coordinates
1295     -  Added new buoyancy relation = 'OCEANICP'
1296     -  Added new parameters = gravitySign (this used to be contained inside
1297        the factor dRdZ which I added when we first switched to R coordinates).
1298     X GM/Redi is not compatible (yet)
1299     X bottom drag and no-slip need to be debugged.
1300    checkpoint46c_pre
1301    
1302    checkpoint46b_post
1303    o Added new equation of state -> JMD95Z and JMD95P
1304      - EOS of Jackett and McDougall, 1995, JAOT
1305      - moved all EOS parameters into EOS.h
1306      - new routines ini_eos.F, store_pressure.F
1307    o Added UNESCO EOS, but not recommended because it requires
1308      in-situ temperature (see JMD95)
1309    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1310      unesco.f to be used with POLY3
1311    checkpoint46b_pre
1312    
1313    checkpoint46a_post
1314    o Added (atmospheric) pressure loading
1315      - new field in FFIELDS.h, etc...
1316      - new cpp flag ATMOSPHERIC_LOADING
1317    o Changed hFacC to _hFacC in calc_phi_hyd.F
1318    o Added SHORTWAVE_HEATING to some files for consistency
1319    checkpoint46a_pre
1320    
1321    checkpoint46
1322    further merges from release1_p5
1323    o new ctrl package
1324      - adopted from ECCO environment to enable optimization
1325      - added Eliassen Palm fluxes to controls
1326    o added Eliassen Palm flux controls to gradient check package
1327    o cost package
1328      - Compatible with new ctrl package
1329      - added Eliassen Palm cost hooks
1330      - modif's of existing cost functions
1331    o Adjoint-related bug fixes in kpp:
1332      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1333      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1334    o autodiff package
1335      - flow directives:
1336        + new for S/R do_the_model_io
1337        + enhanced for S/R checkpoint
1338        + new gmredi.flow
1339      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1340        disable adcommon.h/g_common.h by default.
1341      - fixed problem for adjoint of global_max
1342    o modified verification/carbon/
1343    o New setup for adjoint of global_ocean
1344    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1345    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1346    o incorporated hooks for sponge layer code (external_forcing.F)
1347    
1348    checkpoint45d_post
1349    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1350    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1351      (affects plume_on_slope "cg2d" output)
1352    o add new parameter deltaTfreesurf for free-surface time stepping
1353    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1354    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1355    o change phiMin in exp1 (to agree with documentation)
1356    o add new flags:
1357     - T,S forcing inside/outside Adams-Bashforth
1358     - turn off temp,salt advection and/or forcing
1359     - for each tracer, define internal flag for multiDimAdvection & A-B
1360    o monitor: change definition of KE to check conservation of Energy
1361    
1362    checkpoint45c_post
1363    o Removed f90 comments ("!")
1364    o Modified initialisations to enable exf package for MITgcm
1365      (without invoking ECCO_PACKAGE).
1366    o modifications to gradient check package (Martin Losch)
1367      - enable centered differences
1368      - modified format of standard output
1369    
1370    checkpoint45b_post
1371    o cleaned exchange calls in cg2d
1372    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1373    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1374      to configure barotropic setup (Martin Losch)
1375    o moved some initialisations within bi,bj loop in dynamics
1376      (TAF flow dependency)
1377    o in initialise_varia, moved call packages_init_variables
1378      before convective_adjustment_init
1379      (corresponding adjustment of TAF tape initialisation).
1380    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1381    
1382    checkpoint45a_post
1383    o compute Rho over the whole domain (extend iMin,jMin indices)
1384    o specific exchange for X-slice domain (case Ny=1)
1385    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1386    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1387    
1388    checkpoint44h_post = checkpoint45
1389    o Fix to restore differentiability:
1390      place at which packages_init_variables is called in
1391      initialise_varia is crucial for reverse control flow.
1392    o modifications in GMRedi to enable stable adjoint
1393      (corresponding modif's in thermodynamics, dynamics)
1394    o added missing hook for sponge layer code in external_forcing
1395    o modified test cost functions
1396    o storing in gad_advection (plus removal of write(0,*)!
1397    o missing headers TR1.h added in convective_adjustment routines
1398    o errorMessageUnit set non-equal zero in eeboot
1399      (conflict on some platforms, e.g. IBM SP3)
1400    o modified carbon verif.
1401    
1402    checkpoint44h_pre
1403    o vertical grid option: allow to put the Interface at the middle between
1404      2 cell-centers ; replace delZ in pkg/kpp by drF.
1405    o GM Advective form: Tracers are advected using the residual transport (=
1406      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1407    
1408    checkpoint44g_post
1409    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1410      results) ; ifdef missing in thermodynamics.F
1411    
1412    checkpoint44f_pre,checkpoint44f_post
1413    o added PTRACERS package
1414      This allows an arbitrary number of passive tracers to be integrated
1415      forward simultaneously with the dynamicaly model.
1416      + Implemented so far:
1417        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1418        - I/O and checkpointing
1419        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1420      + Not implemented so far:
1421        - KPP
1422        - OBCS
1423      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1424        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1425        line in data.pkg.
1426      + This package is disabled by default since it increases storage.
1427    
1428    
1429    o testscript: added -cleanup option
1430    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1431                 b) enable to filter 2D fields.
1432    
1433    checkpoint44e_pre,post
1434    o re-wrote convective adjustment to use pre-calculated weights
1435      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1436      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1437      Original calls to convect() still in place.
1438    
1439    chkpt44d_pre,post
1440    o added missing EXCLUDE_MONITOR flags
1441    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1442      (incompatible typ in MIN/MAX expressions caused problems
1443      on IBM SP3)
1444    o in genmake added variable MAKEDEPEND
1445      plus resetting for case SunOS
1446    o added timer_stats.c routine for IBM SP3
1447    o removed variables in dynamics
1448    !!! I forgot to create tag chkpt44d_pre !!!
1449    !!! But chkpt44d_pre = chkpt44c_post    !!!
1450    
1451    o real fresh water flux implemented with non-linear free-surface.
1452    
1453    chkpt44c_pre,post
1454    o few fix (mask in shap_s2, EmPmR in external_field_load,
1455      USE_NATURAL_BCS in solve_for_P);
1456    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1457    
1458    checkpoint44b_pre/_post
1459    o merge of relevant stuff from the ecco-branch:
1460      - genmake: removed $S64 overwrite for case SunOS
1461      - pkg/exf: update and corrections for field swapping and obcs
1462      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1463                  harmonized between ECCO and MITgcm
1464      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1465                      updated checkpointing_lev... lists for obcs
1466      - model/src: minor changes in forward_step, plot_field
1467                   added directive for divided adjoint in the_main_loop
1468      - pkg/mdsio: added mdsio_gl_slice
1469    
1470    o check parameters & config (chkpt44a_pre,post)
1471    o OBC and NonLin_FrSurf.
1472    
1473    checkpoint44
1474    o fix bug in mom_vi_del2uv
1475    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1476    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1477    o update AIM experiments (NCEP input files)
1478    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1479    o added some stuff for AD
1480    
1481    checkpoint43
1482    o added two new advection tests
1483    o added global 4x4 degree ocean test
1484    o added test of H&S94 with free surface on cube
1485    o some final mods for gradient check, adjoint,...
1486    
1487    checkpoint42
1488      Fixed AD-related problems:
1489    o Store directives up-to-date with re-arranged Adams-Bashforth
1490      (mainly thermodynamics.F)
1491    o New store directives for multi-dim. advection schemes
1492      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1493      * new common block and key passkey
1494      (mainly gad_advection.F)
1495    o Modified store directives for split of dynamics/thermodynamics
1496      for the case ALLOW_KPP
1497    o Cleaned argument list for timestep_tracer.F
1498    
1499    checkpoint41
1500    o re-formatted/added comments in prologues of key subroutines
1501      to work with protex
1502    
1503  checkpoint40  checkpoint40
1504  o all changes of checkpoint40pre?  o moved calc_gs, calc_gt and calc_tr1 back to model/src
1505    o added FLT (floats) package from Arne along with demo. experiment
1506    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1507      implementation of forward-in-time forcing terms
1508    o more mods for non-linear free-surface including new variable
1509    o modified multi-dim method to work on cube
1510    o bug fix in KPP (from DM)
1511    
1512    checkpoint40pre9
1513    o added DST advection schemes
1514    o fix MPI bug on SGI's
1515    o modifications for non-linear free-surface
1516    o fixed conditionals for fixed flow/passive tracer only mode
1517    o added tension/strain form of stress tensor
1518    o changes to commenting of arguments for TAF/TAMC
1519    o added/updated many matlab scripts
1520    o added multi-dimensional advection method for tracers
1521      
1522    checkpoint40pre8
1523  o new package rw/  o new package rw/
1524    Added method for dumping intermediate local arrays:    Added method for dumping intermediate local arrays:
1525    mdsio_writetile - same as mdsio_writefield except works from inside    mdsio_writetile - same as mdsio_writefield except works from inside

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