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revision 1.17 by cnh, Mon Nov 30 16:46:45 1998 UTC revision 1.395 by mlosch, Mon Nov 29 20:30:52 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 testreport previously did a lousy job of comparing small numbers, so
7      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
8      implemented in the little c-progam tmp_cmpnum.c which is embedded in
9      testreport.
10    o ptracers_monitor: bug fix for MPI
11    
12    checkpoint56a_post
13    o GCHEM: finish reorganizating the package
14      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
15        (introduces another 3D-array for each passive tracer, but only if
16        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
17        gchemTendency is not needed because the timestep is done separately)
18      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
19      - GCHEM is now---more or less cleanly---separate from PTRACERS
20      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
21        so clear to me how that should be done in a general way.
22    o CFC: improve formatting of output in CFC_ATMOS
23    o PTRACERS:
24      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
25        that ALL experiments with ptracers enable can be checked. This makes
26        GCHEM_MONITOR obsolete.
27      - include a runtime parameter PTRACERS_monitorFreq that defaults to
28        monitorFreq
29      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
30    o add PTRACERS (PTR0[1-5]) to testreport output
31    o exf_check_range:
32      * default changed to .TRUE.
33      * will check values for niter0 if debLevA, every timestep if debLevB
34      * STOP in exf_check_range if 'out of range'
35      * range chosen generous to allow for potential extema
36      TBD: a version with stricter range
37           permitted range would be runtime parameters
38    o GMredi:
39      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
40      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
41      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
42    o GCHEM:
43      - move call to GCHEM_FORCING_SEP, so that it is now called before
44        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
45      - introduced a useGCHEM runtime flag and applied it everywhere.
46      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
47        this flag is now only visible within GCHEM-pkg routines.
48      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
49        be replaced by a 3D array that is computed before thermodynamics; for
50        this, the tracer ID iTracer had to be included into the parameter list
51        of ptracers_forcing
52      - set up forward_step to call gchem_forcing, that will replace
53        gchem_forcing_int in ptracers_forcing
54      - cleaning up
55    o small cleaning of exch2: remove files that are also in eesupp/src
56    
57    checkpoint56
58    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
59    o mnc: cleanup "full" files--fixes out-of-memory problem
60    o ECCO-GODAE
61      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
62      * fully merged and updated from SIO code
63        windstress sign change affects
64        - exf_inscal_[u/v]stress
65        - sign of xx_tau[u/v] adjustments
66        - signs in cost_scat
67      * ctrl_get_gen: avoid update of tau[u/v] for first few days
68      * natl_box_adjoint updated and compressed
69      * 2-level checkpoint switch added
70        (tested in EXP. 1 of natl_box_adjoint)
71      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
72    o SVD
73      * first complete, non-hacked version for SVD calculations
74      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
75        performed via direct access files admtlm_vector.it????
76        (via ctrl_[un]pack)
77      * optimcycle is used for ARPACK iteration counter
78        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
79      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
80        and add linear transforms where necessary
81      * controls are initial/final SST, SSS (can be extended; need to check
82        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
83    o mdsio: filename info to both stderr, stdout
84    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
85      from sign change
86    
87    checkpoint55j_post
88    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
89      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
90    o add consistent build directories and .cvsignore files to verification
91    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
92    o make all subroutines 30 or less characters in length for certain older
93      compilers to work (a thorough search only turns up two routines in
94      pkg/ptracers)
95    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
96      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
97    
98    checkpoint55i_post
99    o change arrays for total vertical diffusivity (2.D if explicit,
100      3.D if implicit) ; each ptracer uses its own background value.
101    o added mnc/NetCDF output capability to ocn_compon_interf
102      - added bits to verification/cpl_aim+ocn so that it can run on
103        ITRDA and other clusters without the mpirun "-wd" option
104    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
105      configuration
106    o give MNC the ability to create additional files rather than
107      exceeding a specified file size limit "MNC_MAX_FILESIZE"
108      - the default is just less than 2GB which is a practical limit
109        on many systems
110    o Compute the non-local term using either KPP vertical diffusivity (=default)
111       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
112    
113    checkpoint55h_post
114    o add verification test "vermix"
115    o remove all the *_ioinc flags and replace with the single global
116      outputTypesInclusive flag
117    o allow to set a vertical profile of vertical diffusivity for T & S
118    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
119    o useMNC moved from data.mnc to data.pkg
120    
121    checkpoint55g_post
122    o Renaming carbon AD experiments to comply with testreport conventions
123    o Updating adjoint of Held-Suarez hs94.1x64x5
124    o Fixing directives for non-ECCO forward_step, after ECCO directives
125      have been fixed to avoid recomp. of do_oceanic_phys
126      Works well for global_ocean.90x40x15,
127      but recomp. issue remains for carbon
128    o Updating adjoint output for natl_box_adjoint after
129      pkg/ecco has been modified (see taga c55d_post)
130    
131    checkpoint55f_post
132    o rename to timeave_init_fixed
133    
134    checkpoint55e_post
135    o some delicate re-shuffle of store directives to avoid one
136      extra call of do_oceanic_physics
137      affects ecco_the_main_loop.F, do_oceanic_physics.F
138      checkpoint_lev1_directives.h
139    o NB: this may break global_ocean adjoint temporarily,
140      but it is clear how to fix it. Will do later, need this now.
141    
142    checkpoint55d_post
143    o ECCO specific cost function terms (up-to-date with 1x1 runs)
144    o ecco_cost_weights is modified to 1x1 runs
145    o modifs to allow observations to be read in as
146      single file or yearly files
147    o enable to read exf forcing fields as either
148      single file or yearly files (flag useExfYearlyFields)
149    checkpoint55d_pre
150    
151    o switch between 2-level and 3-level checkpointing
152    o add ability of MNC to write local and "partial" (eg. 2D slices where
153      the full 3D field is never actually stored) arrays to NetCDF files
154      with the correct (that is, the complete multi-dimensional) set of
155      array indicies
156      - used in mom_vecinv() to write the diagFreq output
157      - tested (demonstrated) in verification/aim.5l_cs
158    o further mnc-ification
159      - add verification/lab_sea to the list with mnc setups
160      - fix undefined mnc v-names in cd_code
161      - add kpp to mnc output (both snapshot and timeave)
162    o non-hydrostatic code
163      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
164        in calc_gw.F
165      - defaults to viscAh
166      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
167        friction or Leith) in non-hydrostatic mode, as long as there is
168        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
169    o pkg/cost
170      extend simple cost functions to treat time mean quantities
171      (T,U,V) via cost_accumulate_state from cost_tile
172    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
173        be 2 times larger than the minimum size the advection scheme requires.
174        now get a perfect conservation of salt in advect_cs test-exp (updated)
175    o GGL90 (Gaspar's TKE mixed layer)
176      - add horizontal diffusion of TKE, requires exchanges in
177        do_fields_blocking_exchanges, horizontal diffusivity is zero by
178        default. In OPA there is no horizontal diffusion of TKE but the
179        mixing coefficients are computed from a horizontal average of TKE of
180        6 points or so. I think that diffusion has a little more physical
181        justification.
182      - clean up ggl90_calc in the hope of reducing memory usage (this hope
183        was in vain)
184      - mask tke-variable in ggl90_init
185    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
186    o fix biharmonic diffusion on CS-grid.
187    o more obcs stuff
188      - added obcs_external_fields_load as an alternative to the EXF-pkg option
189        for reading boundary values. This routine is called from
190        obcs_prescribe_read
191      - updated obcs_check
192      - changed sponge layer relaxation parameter units for days to seconds
193      - turned off sponge layer by default
194      - changed argument list of OBCS_CALC to myTime+deltaTclock
195      - fixed about 35 bugs in obcs_external_fields_load
196    
197    checkpoint55c_post
198    o obcs stuff
199      - new runtime flags useOBCSprescribe, useOBCSbalance
200      - re-arranged obcs_calc
201      - moved exf_getobcs to obcs_prescibe_read
202        obcs_prescibe_read is called after ORLANSKI stuff
203        and independent of it (executable can contain all).
204      - updated obcs_check
205      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
206        These may be necessary only if tangential velocities are
207        prescribed at OB, not sure, needs testing.
208    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
209      which simplifies the calls and passes the ifc check-bounds test
210    
211    checkpoint55b_post
212    o add a 2D scalar, Z location, exchange_2 routine.
213    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
214      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
215      affects advect_cs results (for the wrong reason): update output.txt
216    o use a more standard discretization for biharmonic viscosity ;
217     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
218      affects results of dome set-up: update output.txt
219    o fix gad_advection.F (CubedSphere part), back to version 1.23
220    o fix bug in mom_vi_del2uv.F (CubedSphere part).
221    
222    checkpoint55a_post
223    o merged code to
224      * prescribe/read time-dependent open boundaries
225        (works in conjunction with exf, cal)
226      * sponge layer code for open boundaries
227      * each boundary N/S/E/W now has its own CPP option
228        (healthy for the adjoint)
229    
230    checkpoint55
231    o up-to-date adjoint of previous breaks
232      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
233      - global_ocean_ebm: adjoint still needs fix (TLM ok)
234      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
235      - carbon: * remove tr1-related adjoint verification
236                * add ptracer as control variable
237    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
238      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
239    
240    checkpoint54f_post
241    o in verification/carbin/ remove experiment related to
242      ALLOW_PASSIVE_TRACER (array tr1 etc)
243      code_ad/ input_ad/ results_ad
244    
245    o add two new packages
246      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
247        + subject to optimization (memory)
248      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
249        + subject to reordering (many GOTOs in the original code)
250        + so far opps is called for every (i,j) point, and then operates in
251          the vertical; one may want to reorder the scheme in order operate in
252          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
253          fields)
254    o overhaul of IO so that we now have flags for MDSIO and/or MNC
255      - all verification tests compile and run with linux_ia32_g77
256      - defaults are compatible with current input files--nothing
257        should change if you were not previously using MNC
258      - MNC output has been added in numerous places (eg. timeave)
259        but there are still a few writes not yet do-able with MNC
260        (this is in progress)
261      - flags now allow for either/or/both use of MDSIO and MNC and
262        documentation will soon follow
263      - numerous small formatting cleanups for ProTeX
264    o add version info (via BUILD_INFO.h) to MNC and stdout
265    
266    checkpoint54e_post
267    o add two new packages
268      - pp81 (Packanowski and Philander, 1981), Richardson number and
269        stratification dependent mixing
270      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
271      - these scheme operate in a similar manner as KPP (without ghat, of
272        course), however there is only one diffusivity that is used for both
273        temperature and salinity (and passive tracers)ç
274    o add offline package
275    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
276      provided by Stephanie Dutkiewicz
277    o genmake2: add ability to search for C compilers and cleanup test output
278      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
279    
280    checkpoint54d_post
281    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
282    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
283      leading to additional shift by 5 days each year of integration
284       (i.e. leading to considerable offset over the years)
285    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
286    o start with no AB and no initial filtering (staggerTimeStep):
287      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
288    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
289      (external loading & cpl import/export stay in forward_step.F)
290    o update coupling interface to work with new staggerTimeStep
291    o change MDSIO ptracers_pickup.
292    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
293    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
294    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
295    
296    checkpoint54c_post
297    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
298      this affects (truncation error) output.txt of test-exp:
299       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
300    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
301    o change Qnet to always be the net heat flux, (+upward).
302      affects (truncation error) output of natl_box exp.: updated
303    o define the max number of passive tracers in PTRACERS_SIZE.h
304    o start to test mnc routinely in exp0
305    o add sea-ice loading (sIceLoad) as a new forcing field.
306    
307    checkpoint54b_post
308    o add testreport "-j JOBS" option for parallel builds (tested and pretty
309       impressive on Altix and Opteron systems)
310    o diagnostics can now write NetCDF files through the mnc package
311    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
312    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
313    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
314      affects (truncation error) output of lab_sea & natl_box exp.: updated
315    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
316    
317    checkpoint54a_post
318    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
319    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
320    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
321    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
322      + internal_wave (shift in writing cg2d_ini_res)
323    checkpoint54a_pre
324    
325    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
326      - modified verification/lab_sea and natl_box_adjoint accordingly
327    
328    checkpoint54
329    checkpoint53g_post
330    o prepare splitting of thermodynamics: store convect.counter in common block
331    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
332      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
333    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
334    o new parameter "nShapS": allow to treat differently S from T (nShapT)
335    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
336    o restore adjointability
337    
338    checkpoint53f_post
339    o modifications that affect AIM experiment results (update output.txt):
340      - no advection of S at top interface Nr (pkg/generic_advdiff)
341      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
342    o AIM pkg:
343      - include stability function into surf.Flux derivative relative to Tsurf
344      - calculate clear-sky radiation & surface temp. change (for diagnostics)
345    
346    checkpoint53e_post
347    o merged cylindrical coord configuration
348    o added rotating_tank experiment
349    checkpoint53e_pre
350    
351    checkpoint53d_post
352    o faulks upgraded: re-generate output.txt that have changed:
353       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
354    o Added Bryan and Lewis, 1979, vertical diffusivity profile
355    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
356    o added Sadourny discretization of Coriolis
357      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
358      - re-enabled use of omega3 (useAbsVorticity)
359    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
360      vector-invariant equations
361      - note: does *NOT* yet use same variable visc. for no-slip BC's.
362    o recoded the lateral boundary conditions for non-hydrostatic w, this time
363      hopefully without new bugs
364      - still to do: biharmonic friction for non-hydrostatic w
365    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
366    o regenerated output for global_ocean_ebm (using -ieee)
367    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
368      of mom_common/
369      - simple re-arrangement of instructions within computing loop
370    checkpoint53d_pre
371    
372    checkpoint53c_post
373    o new version of coupler for AIM+thSIce and Ocean models
374     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
375     - land: change Evaporation of snow
376     - aim with thSIce: fix bug in snow-precip.
377    o changes to calc_gw.F
378     - bug fix for w^2 term near the bottom boundary
379     - (hopefully) improve the lateral slip boundary condtions for use with
380        partial/looped cells
381      - because the bug fix changes two verification experiments anyway (exp5
382        and plume on slope), change the lateral boundary condition from half slip
383        to the value of no_slip_sides
384    o ebm package wasnt quite up to the parallel task. Fixed that.
385    o Adjoint of EBM package + verification
386      * TLM OK
387      * ADM not sufficient accuracy yet (needs further testing)
388    
389    checkpoint53b_post
390    o Commiting new energy balance model to repository
391      * package is pkg/ebm
392      * verif. is verification/global_ocean_ebm
393      * references are in ebm_driver.F
394    C      * X. Wang, P. Stone and J. Marotzke, 1999:
395    C        Global thermohaline circulation. Part I:
396    C        Sensitivity to atmospheric moisture transport.
397    C        J. Climate 12(1), 71-82
398    C      * X. Wang, P. Stone and J. Marotzke, 1999:
399    C        Global thermohaline circulation. Part II:
400    C        Sensitivity with interactive transport.
401    C        J. Climate 12(1), 83-91
402    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
403    C        Destabilization of the thermohaline circulation
404    C        by atmospheric eddy transports.
405    C        J. Climate 7(12), 1870-1882
406    o Will need long integration testing.
407    checkpoint53b_pre
408    
409    o created pkg/mom_common in preparation for variable viscosity code
410    o renamed and split ini_mnc_io
411    o pkg/land: only liquid water can diffuse or run-off
412    o AIM using land: soil wetness availability account for snow
413    o added printMapIncludesZeros to EEPARMS namelist
414    
415    checkpoint53a_post
416    o restore TAMC compatiility for exf_constants.h
417      (no usage of _d in .h)
418    o Additional storing in KPP in an attempt to fix
419      TAMC problem with adjoint of KPP code.
420      (no success...)
421      Identical code works fine with TAF.
422    o Fixed verification/natl_box_adjoint experiments.
423      Initial conditions for Experiments 4 and 5 are now
424      set to "SEAICE_initialHEFF=0", which is more reasonable,
425      and hence gives results closer to that of Experiment 2.
426      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
427    
428    checkpoint53
429    o stable checkpoint with up to date adjoint
430      TLM tests only run for 1st grdchk at the moment. Its unclear if
431      this is a code problem or a problem with resetting code for g_
432      variables that is being autogenerated wrong.
433      Otherwise:
434       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
435       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
436         are both still in chaos following their security messes.
437    
438    checkpoint52n_post
439    o various build (mostly genmake2) changes including:
440      - ability to build/run more easily within Cygwin and MacOS X
441      - more complicated Makefiles with a stronger dependence on Gnu Make
442    o pkg/seaice modifications
443      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
444        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
445        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
446      - changed proxy for geostrophic velocity and updated
447        verification/lab_sea/results/* accordingly
448      - removed ADI dynamic solver from pkg/seaice
449      - replaced all occurrences of 1/CSTICE or 1/CSUICE
450        they caused a segmentation fault under certain circumstances
451      - removed unused field WATR
452    o bug fix in exf-package:
453      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
454         now reflect that.
455    o small fixes in the cal-package:
456      - set reference date to first of January for the 'model'-calendar
457      - failing of cal_CheckDate in cal_FullDate now actually results in a
458        warning
459    o small modifications in exf-package to increase flexibility:
460      - change climtempfreeze from a constant to a runtime parameter that
461        is specified in data.exf_clim (default = -1.9)
462      - introduce runtime parameter windstressmax (default = 2.0) that is
463        specified in data.exf
464    o fix in pkg/thsice:
465      - update Evap (Tsf changes) to be consistent with Latent heat flux
466      - maintain snow precipitation unchanged (even if Tsf >=0).
467     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
468    
469    checkpoint52m_post
470    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
471      this does not change any of the results, because myIter=0 in swfrac always
472      lead to jwtype=2 (the default anyway), but the call makes little sense
473      as a default
474    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
475    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
476      atmospheric model (AIM) to use it ; add a "slab ocean" component.
477    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
478    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
479    o extending useSingleCpuIO option to work with new exch2 I/O format
480      - old-style, missing-tile I/O is still accessible by defining CPP
481        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
482    o monitor package can write to NetCDF files and/or STDOUT
483    o fix re-definition bug in MNC_GRID_INIT_ALL()
484    o doc/api_reference added
485      - a framework for building an API Reference Manual using all
486        the "protex" comments embedded in the code
487      - see pkg/generic_advdiff, pkg/mnc for examples
488    o MNC:
489      - make myThid the last argument for all subroutines
490      - new default for the grid files: NO halos
491      - add useMNC and other run-time flags
492      - separate per-file-group handling of the unlimited dimension
493      - early initialization of MNC w/ flags read at the eeboot stage
494        and lookup tables set in initialize_fixed
495      - write all MNC output to a freshly-created directory
496    o thermodynamics sea-ice (thsice) is now tested with testreport.
497    o test exp. advect_cs: use the standard cs32 grid ; update output.
498    o Added functionality to grdchk:
499      pick global i,j,k position (or nearest wet) where to perform check.
500    
501    checkpoint52l_post
502    o new land formulation:
503      a) use ground enthalpy as prognostic variable to ensure exact
504         energy conservation.
505      b) account for water temperature and for latent heat of freezing
506         in all processes (rain, run-off, ground storage)
507      c) compute surface and ground temperature implicitly.
508    o aim_v23 modification for new land model:
509      a) Treat separately land / ocean / sea-ice surface fluxes
510         to allow implicit computation of land & sea-ice surface temp.
511      b) add snow precipitation.
512    checkpoint52l_pre
513    
514    o fix problem (when 1 tile is empty) in min/max monitor.
515    o fix bug in timeAve (u,vZetatave in common block)
516    o no restoring terms under ice for pkg/seaice
517    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
518    o bug fix for pkg/seaice pickups
519    o change MNC call locations and add coordinate attributes
520    o mask vorticity at the corner ; affects global_ocean.cs output
521    o fix ini_curvilinear_grid ; test CS experiments with mpi
522    o aim.5l_cs: modify sea-ice fraction input file ; update output
523    o exf: Adding simple range check routine for exf fields after read
524    
525    checkpoint52k_post
526    o removed top-level directory "diags"
527      - we migrated these functions to pkg/timeave a long time ago
528    o fixed bug introduced in pkg/monitor
529    o accuracy ctrlprec = 32 insuffient for gradient checks using
530      averaged fields (I/O via cost_averages)
531      -> use ctrl.h in active_file*.F to control I/O precision.
532    o paramter list of CALL ADTHE_MAIN_LOOP
533    o added initial do_the_model_io to ecco
534    o set all ...Freq to zero after cost_final
535      taveFreq, dumpFreq, pChkptFreq
536    o MAIN and ECCO differentiability restored
537    
538    checkpoint52j_post
539    o fix nchklev in tamc.h for global_ocean...
540    o Bringing flow and store directives up-to-date
541    o Really weird thing!
542      call do_the_model_io from the_main_loop with parameters
543      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
544      TAF places a faulty re-call of initialise_varia
545      after cost_final call which should not be there!
546    checkpoint52j_pre
547    
548    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
549      error messages
550    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
551    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
552      debug output
553    o modfied mdsio_writefield.F to handle non-global files under exch2
554    o update AIM Cubed-Sphere exp (aim.5l_cs):
555      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
556    o update AIM Equatorial Channel exp:
557      use standard aim_v23 pkg and change the SST fields to be more realistic.
558    o globalFile now works with exch2
559    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
560      mon_vort3.F to make exch2 friendly with >1 tile per cube face
561    o limit timeave output for hi-res integrations
562    
563    checkpoint52i_post
564    o removed CPP_EEOPTIONS.h from verification/*/code
565    o updated the tiling for global_ocean_pressure
566    checkpoint52i_pre
567    
568    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
569      the old pkg/aim).
570    
571    checkpoint52h_pre
572    o shortened offending lines in exch2_send_rx?.template
573    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
574    o genmake2: add build & execute test for NetCDF code
575    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
576      old grid files, moved CPP_EEMACROS.h to pkg/exch2
577    o added useSingleCPUIO flag to monitor.F and mon_out.F
578    o added temporary hack for sea-ice dynamics on the cube:
579      metric terms are ignored and it is assumed that
580      there is no sea-ice on cube faces 1, 2, 4, and 5.
581    
582    checkpoint52f_post
583    o added exch2 cube routines to pkg/exch2
584    o modified hs94.cs-32x32x5 to use it
585    o added new grid files to hs94.cs-32x32x5
586    checkpoint52f_pre
587    
588    checkpoint52e_post
589    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
590      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
591    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
592      to work with implicit vertical advection and AB ;
593    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
594    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
595     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
596    checkpoint52e_pre
597    
598    o fix bug in impldiff when Nr=1 or Nr=2.
599    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
600    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
601    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
602      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
603    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
604    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
605    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
606    
607    checkpoint52d_post
608    o re-tiled many expts to allow comparison in multi-processor mode
609      - updated output accordingly
610      - changed hs94.128x64x5 to use intial T from file rather than use the
611        random number generator
612    o add infrastructure in model routines for fizhi and gridalt packages
613    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
614    o changes to permit hi-res, cubed-sphere, configuration
615      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
616      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
617      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
618        of surface winds for the cube
619      (A verification experiment, based on global_ocean.cs32x15, but with
620       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
621       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
622       complete with example surface forcing files and matlab scripts to look
623       at the output and compare it with that of global_ocean.cs32x15.)
624    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
625       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
626       to conform to the common rule.
627    o check-in the first version of the coupler + interfaces for multi-components
628       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
629       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
630       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
631       - ocean and atmos. share the same horizontal grid (no interpolation).
632       - exchanges between component and coupler is done in forward_step
633    o new verification experiment, cpl_aim+ocn:
634       coupled ocean - AIM atmosphere on cs32 grid.
635    
636    checkpoint52d_pre
637    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
638    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
639    
640    checkpoint52c_post
641    o Fixing OPTIONS files for use of exf:
642      - ALLOW_ECCO not needed
643      - ECCO_CPPOPTIONS.h should not be included from
644        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
645        as has been the case in the past
646      - All cal/exf related options are currently set in
647        single header file. Should remain so until we
648        agree on a consistent new policy.
649    o Removed all CPP options for cal package.
650      cal has no more CPP options.
651    o modified STOREs in GAD_ADVECTION
652    o corrected key comp. for passkey
653    
654    checkpoint52b_post
655    o new version: "thsice" of thermodynamic sea-ice pkg:
656     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
657     - modify fluxes but do not change theta directly;
658     - light cleaning of bulk_force pkg (still needed with thsice).
659     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
660       + output_thsice.txt to test thsice & bulk_force pkgs.
661    o put back grid & coriolis monitor output.
662    checkpoint52b_pre
663    
664    o call "do_the_model_io" at the beginning (=> dump initial state)
665    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
666    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
667      (need info on NUMBER_OF_PTRACERS)
668    o missing PTRACERS headers in some routines
669    o default tamc.h in pkg/autodiff supposed to crash
670      to ensure proper customization
671    
672    checkpoint52a_post
673    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
674      - moved surfaceTendencyTice from pkg/seaice to main code
675      - subroutine FREEZE_SURFACE now limits only surface temperature
676        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
677        => new output.txt for global_ocean.cs32x15 & global_with_exf
678      - keep the old version of FREEZE for backward compatibility;
679        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
680      - corresponding modifs for TAF directives
681    o added surface flux output variables to TIMEAVE_STATVARS
682    o time-averaged output for pkg/ptracers
683    o fix problem with ECCO-related divided adjoint
684      snapshot file was missing some ad-variables,
685      but no warning issued by TAF
686    
687    checkpoint52a_pre
688    o some bug fixes for #undef REAL4_IS_SLOW
689    
690    checkpoint52 = ecco_c52_e35
691    o after testing adjoints of checkpoint51u_post
692    
693    checkpoint51u_post
694    o this is the post-merge tag of the ecco-branch
695      (needs another clean checkout and re-testing)
696    o various natl_box_adjoint configs and results
697      but no input fields
698    o obcs adjoint not yet merged!
699    o adding ECCO global 1x1 and 2x2 degree configs
700    o updated/extended some store directives for seaice
701    o pkg/ecco now containes ecco-specific part of cost function
702    o top level routines the_main_loop, forward_step
703      supersede those in model/src/
704      previous input data.cost now in data.ecco
705      (new namelist ecco_cost_nml)
706    o in ctrl/ cleaned some cross-dependencies and updated CPP options
707    
708    checkpoint51t_post
709    o this is the pre-merge tag of the ecco-branch
710    
711    checkpoint51s_post
712    o cleanup: removed various obsolete #define-s
713    o pkg/grdchk
714      - renamed 'ph-grd 3' to 'grad-res'
715      - merged from ecco-branch
716        (remaining bug fixes for obcs gradient checks)
717      - additional high-precision output for testreport
718        (grep for 'precision_grdchk_result')
719    
720    checkpoint51r_post
721    o cleaned up or removed CPP_OPTIONS.h files
722    o updated results for some of the tests to reflect the new
723      optfiles (-ieee: -O0 instead of -O3)
724    
725    checkpoint51q_post
726    o cd_code:
727      - moved cd_scheme.F -> cd_code_scheme.F
728      - separate read_checkpoint from cd_code_ini_vars.F
729      - separated cd_code part from write_checkpoint
730      - updated AD_SOURCE, generated .flow
731      - added CD_CODE_VARS.h to the_main_loop
732      - Moving cd_code specific store dir.s to pkg/cd_code
733    o ctrl package totally restructured
734      - pack/unpack now optional and decoupled from
735        xx_/adxx_ I/O
736      - ctrl_pack/unpack cleaned
737        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
738      - confined inclusion of AD_CONFIG.h to where necessary.
739    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
740    
741    checkpoint51p_post
742    o create initial cd_code package
743      - WARNING: the initialization of fields within packages
744        is broken because INI_FIELDS (where READ_CHECKPOINT is
745        called) is called *before* PACKAGES_INIT_VARIABLES.
746        This seems to be backwards since
747        1) its important to initially zero the entire field including
748           the "halo" region
749        2) zeroing needs to be done *before* reading pickup info
750           and the pickup call might or might not happen in any
751           particular run
752      - this needs an overhaul for R2
753    o cleanup verification/*/code/GMREDI_OPTIONS.h
754    o cleanup testreport
755    
756    checkpoint51o_post
757    o bringing AD-related verif's up to date with genmake2
758      - carbon/
759      - global_ocean.90x40x15/
760      - hs.94.1x64x5/
761      - (front_relax/ )
762    o (more) consistent directory structure for AD-related verif.'s
763    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
764    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
765    o bug fix in find_alpha.F for MDJWF:
766      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
767        change rho -> rho-rhoConst
768      - replace call find_rho to find_rhonum
769    o initialisation of rFlx extended to full array (required by TAF)
770      and shifted to thermodynamics
771    o removed PTRACERS.h in ptracers routine
772    o added surfacetendencyPtr to S/R parameter list pracers_forcing
773    o Correcting initialisations for fVerU, fVerV.
774    o helping TAF to recognize dependency on kUp for
775      fVerU, fVerV
776    o Replacing delZ by delR in pkg/ctrl/
777    checkpoint51o_pre
778    
779    o undid all of cp51 pending some cleanups and discussion
780    o added the [#include "AD_CONFIG.h"] statement to all files that need
781       it for adjoint/tl #defines
782     o re-worked the build logic in genmake2 to support AD_CONFIG.h
783     o removed tools/genmake since it no longer works
784    
785    checkpoint51n_post
786    o modifications to make FREEZE flux visible to pkg/kpp
787      - moved surfaceTendencyTice from pkg/seaice to main code
788      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
789      - subroutine FREEZE now limits only surface temperature
790        (this means new output.txt for global_ocean.90x40x15,
791         global_ocean.cs32x15, and global_with_exf)
792    o added surface flux output variables to TIMEAVE_STATVARS
793    
794    checkpoint51n_pre
795    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
796    o added [#include "AD_CONFIG.h"] to all files that use the following
797      defines:
798      - ALLOW_ADJOINT_RUN
799      - ALLOW_TANGENTLINEAR_RUN
800      - ALLOW_ECCO_OPTIMIZATION
801    
802    checkpoint51m_post
803    o incorporating changes to get TAMC/TAF working in genmake2
804      - added new TAMC/TAF targets to the Makefile
805      - various cleanups related to package handling
806      - these changes should have no impact on the forward model
807    
808    checkpoint51l_post
809    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
810     - faster algorithm for cal_addtime.F
811     - higher precision arithmetic, where needed
812     - pkg/exf *startdate variables changed from calendar date to
813       model integration time
814    
815    checkpoint51l_pre
816    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
817    o enable to apply restoring on S & T only in a latitude band.
818    o update output (external_forcing_surf modif. change truncation errors)
819       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
820    
821    checkpoint51k_post
822    o change default to: useNHMTerms=.FALSE.
823     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
824       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
825     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
826        exp1, ideal_2D_oce
827     - change data file of oceanic exp (leave the results unchanged for now)
828       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
829    o set gravitySign automatically according to the vertical coordinate used
830      (and change sign: back to "logical" value: +1 when R increases downward)
831    o added an include barrier to the default CPP_OPTIONS.h and
832      removed the #include "PACKAGES_CONFIG.h" from it
833    o fix a bug in mom_fluxform (from chk51j_post)
834    
835    checkpoint51j_post
836    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
837    o adjusted some flow directives (dynamics, thermodynamics)
838    o added cubed-sphere case to test cost function
839    o heckpoint_lev?_directives.h now include
840      pkg-specific directives, whenever those are enabled.
841    o Moving pkg-specific flow directives to corresponding pkg
842      Moving pkg-specific differentiation list to corresponding pkg
843      Moving pkg-specific checkpoint-lev storing to corresponding pkg
844      ---> conventions are
845           - pkg_ad.flow
846           - pkg_ad_diff.list
847           - pkg_ad_check_lev?_dir.h
848    
849    checkpoint51i_post
850    o merge of the branch-genmake2
851      - knowingly breaks the older genmake
852      - automatic generation of all ALLOW_${PKG_NAME} defines
853      - new testreport supersedes older testscript
854    o large number of package inclusion and header cleanups
855    checkpoint51i_pre
856    
857    o new output for adjoin of global ocean vector invariant
858    o fix for checkpoint of thermodynamic seaice and bulk_force
859    o Steph gchem various cleanups
860    
861    checkpoint 51h_pre
862    o fixed some single quotes
863    o modify gchem pkg to be more versatile
864    o modifications to clean up dic pkg
865    o add pkg/cfc
866    
867    checkpoint51g_post
868    o provide links for ARPACK and ADM*TLM
869    o start removing verification/vero/
870    o update AD-related stuff
871      (in particular some IF-statements in model/src/ routines)
872    o adding to verification/global_ocean.90x40x15/ adjoint of
873      vector invariant setup
874    
875    checkpoint51f_post
876    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
877    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
878      of tracer Green's fucntions for ocean inversion project.
879    
880    checkpoint51f_pre
881    o Added on-the-fly spatial interpolation capability
882        "USE_EXF_INTERPOLATION" to pkg/exf.
883      - This is a temporary Cartesian-grid hack until
884        the super-duper ESMF coupler becomes available.
885      - See verification/global_with_exf/README for usage example.
886      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
887        flags and modified pkg/seaice accordingly.
888    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
889        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
890        non-local transport term.
891    
892    checkpoint51e_post
893    o pkg/mom_vecinv:
894      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
895      - add time-ave diagnostic of vorticity advection.
896    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
897    o atmospheric geopotential: - include water vapor effect;
898                                - use p^kappa in p* scaling.
899    o land pkg: read initial state from files.
900    o AIM : add stratospheric drag in the upper level
901    
902    checkpoint51d_post
903    o change function ILNBLNK (=> last non-blank char.) to return zero
904      (instead of the string length) when the string. char is empty
905    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
906    o modif's to restore TAMC compatibility
907      - avoid "_d" constructs in PARAMETER declarations
908      - avoid interrupting lines by comment lines
909    o Use cluster local disks for purely local I/O
910      vs. globally visible disks needed for ctrl stuff
911      (merged from ecco-branch)
912      - new active_file_loc... and mdsio_..._loc routines
913      - affected packages: autodiff, ctrl, grdchk, mdsio
914    
915    checkpoint51c_post
916    o introducing integer flag debugLevel
917      - debLevZero: suppress all output
918      - debLevA: standard
919      - debLevB: equivalent to current debugMode=.TRUE.
920    o introducing pathname variable mdsioLocalDir for mdsio
921      that can be specified at runtime
922      (relevant for cluster I/O to local disk)
923    `
924    >>>checkpoint51b_post
925    adjoint of ptracers
926    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
927    o extended state in checkpoint_lev?, etc.
928    o alternative ctrl/cost with tr1 or ptracer
929    o new comlev1_bibj_ptracers
930    o new ptracers.flow
931    o made ptracers_forcing same as external_forcing_s
932    o added verification for adjoint with ptracers
933      - adm. grdchk fail so far
934      - tlm. grdchk OK
935      - checked tapelev/comlev recomputations: OK
936    <<<checkpoint51b_pre
937    
938    checkpoint51a_post
939    o added code for biogeochemistry package
940      - new pkgs: dic, gchem
941      - new subroutine in ptracers
942    o modify code for biogeo packages
943      - in model/src and pkg/ptracers
944    
945    checkpoint51
946    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
947      - autodiff, ctrl, exf, grdchk, seaice
948      kept separate packages
949      - cost, ecco, obcs
950    o updating verification/internal_wave, verification/lab_sea
951      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
952    
953    checkpoint50i_post
954    o Preparing next differentiable checkpoint and sync
955      of MAIN vs. ecco-branch
956      - 1st step: this one is differentiable
957      - 2nd step: next(! not this) checkpoint will have updated packages
958                  from ecco-branch)
959    
960    checkpoint50h_post
961    o new package "land": provide surface BC for AIM.
962    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
963    o AIM: use true log-P extrapolation for near surface temp (= as in
964        F.Molteni paper) ; update aim.5l_cs output.
965    o New variable in PARM03 for more flexible pickups
966    o somewhat cleaned package initialisation sequence for
967      ctrl/ cost/ ecco/ in packages_... routines
968    
969    checkpoint50g_post
970    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
971      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
972      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
973        made the default because of faster convergence than ADI
974    
975    checkpoint50f_post
976    o exf totally restructured
977      - replaced all exf_set_ routines by one generic exf_set_gen.F
978        and made sure it's still differentiable
979      - split exf_getffields.F into new exf_bulkformulae.F
980      - exf_inscal_/exf_outscal_ suffixes consistent with field names
981      - updated adjoint/makefile and relevant verif. accordingly
982    
983    checkpoint50f_pre
984     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
985          + change Evap over land. (update aim.5l_cs output)
986     o added missing .cvsignores and made uniform across expts
987     o changed configuration of tidal_basin_2d expt
988     o added pkg/debug functions for tracing code in fatal crashes
989     o tidied pkg/monitor to use MONITOR_OPTIONS.h
990     o new fn in pkg/monitor to stop model if solution grows too big
991     o removed lots of single quotes from comments
992    
993    checkpoint50e_post
994    o make KPP work with PTRACERS
995     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
996       nearly a copy of kpp_transport_s
997     - there is no analogue to SurfaceTendencyS, so I have to use
998       gPtr(of the surface layer) instead
999    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1000    checkpoint50e_pre
1001    
1002    checkpoint50d_post
1003    o change kpp output from multiple-record state files to single-record state
1004      files analogous to write_state.F
1005    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1006      analogous to the cg2d-related output.
1007    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1008      so that writing to internal file fn (with length 512) fails.
1009    checkpoint50d_pre
1010    
1011    checkpoint50c_post
1012    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1013    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1014    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1015    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1016    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1017    
1018    checkpoint50c_pre
1019    Merging from release1_p13:
1020    o bug fix for pkg/seaice dynamic solver
1021    o Added SEAICE_initialHEFF to pkg/seaice
1022    
1023    checkpoint50b_post
1024    o store u*,v* in gU,V instead of in guNm1,gvNm1
1025    o in order to put the momForcing out of the Adams-Bashforth:
1026      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1027      to timestep.F
1028    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1029    o re-generate output for highly sensitive test-exp:
1030       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1031    
1032    checkpoint50b_pre
1033    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1034    o corrected CPP option mismatch in exf_Bulk... functions for case
1035      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1036    
1037    checkpoint50a_post
1038    o Bug fix for merging between c50 and KPP.
1039      ikey was passed from thermodynamics to kpp_calc via
1040      common block rather than being recomputed in kpp_calc,
1041      in contradiction with new key itdkey.
1042      New key ikppkey created, and tamc.h headers updated.
1043    
1044    checkpoint50
1045    - 2nd step of merge with ecco-branch:
1046      merge changes in ecco-branch back into main trunk
1047    - bug fix in find_alpha
1048    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1049    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1050    - merged some sliced AD support routines
1051    
1052    checkpoint49
1053    merged from ecco-branch:
1054    o exf:
1055      - Enable initialisation of forcing fields to constant
1056        (runtime) values.
1057      - in exf_getffields.F
1058        Reduce i-/j-loop to interior domain, discarding overlaps.
1059        That also fixes wrong TAF-key computations for key_1, key_2
1060        with bulf formulae.
1061      - exf_init.F modify #ifdef for exf_init_evap
1062      - exf_getffieldrec.F, ctrl_getrec.F
1063        The following INT-usages are not safe:
1064          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1065          fldcount = int(fldsecs/fldperiod) + 1
1066        and were modified.
1067    o autodiff: checkpoint_lev...
1068      - updated storing for bulk formulae (some arrays were missing)
1069      - added state for seaice package
1070      - synchronized with main branch
1071    o DIVA:
1072      Modif.s in
1073      - the_main_loop.F
1074      - the_model_main.F
1075      and added cost_final_restore.F cost_final_store.F
1076      o With these changes, it is possible to fully separate
1077        the first forward run to compute the cost function (mdthe_main_loop)
1078        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1079        into separate model executions.
1080        This enables better tuning of DIVA to given queue sizes.
1081      o Loss of cost function value in consecutive DIVA runs is
1082        fixed by storing to 'costfinal' file.
1083      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1084        beginning/end of adjoint integration is accounted for.
1085      The current changes apply to TAF-1.4.26.
1086      TAF has one remaining bug, requiring one manual change
1087      (see MITgcm manual).
1088    o cal: synchronized between MAIN and ecco-branch
1089    
1090    checkpoint48i_post
1091    o Changes to restore differentiability of code w.r.t. previous tag
1092      (mostly adding new routines to make list and replacing
1093      pressure by totPhiHyd).
1094    o Updated and merged grdchk package
1095      - has both ADM and TLM checks
1096      - works for single- and multi-proc.
1097      - output cleaned
1098      - worked successfully for parallel DIVA
1099    o genmake:
1100      - Adding -platform=SP4
1101      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1102    o Modif. for DIVA:
1103      ctrl_unpack should not be called in intermediate DIVA interval.
1104      (similar thing would apply for active files such as
1105      tbar, sbar, psbar, which should not be reinitialised;
1106      only relevant for ecco-branch)
1107    
1108    checkpoint48h_post
1109    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1110    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1111    o Added SEAICE_initialHEFF to pkg/seaice
1112    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1113    
1114    checkpoint48g_post
1115    --- EOS:
1116    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1117      store total Potential in totPhyHyd for diagnostics & EOS.
1118    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1119    --- Pressure/geopotential gradient:
1120    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1121    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1122      ( changes results of global_ocean_pressure )
1123    o NLFS + z-coord.: add eta*Rho' contribution.
1124    o accurate phiHyd when using interface-W at the middle between 2 centers
1125     ( changes results of ideal_2D_oce )
1126    o includes r* 2nd term in potential gradient.
1127    
1128    checkpoint48f_post
1129    Merging from release1_p12:
1130    o Modifications for using pkg/exf with pkg/seaice
1131      - improved description of the various forcing configurations
1132      - added basic radiation bulk formulae to pkg/exf
1133      - units/sign fix for evap computation in exf_getffields.F
1134      - updated verification/global_with_exf/results/output.txt
1135    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1136      (SBO) core products, including oceanic mass, center-of-mass,
1137      angular, and bottom pressure (see pkg/sbo/README.sbo).
1138    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1139      to avoid negative values in shallow regions.
1140      - updated verification/natl_box/results/output.txt
1141      - updated verification/lab_sea/results/output.txt
1142    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1143    o Added useSingleCpuIO option (see PARAMS.h).
1144    o Updated useSingleCpuIO option in mdsio_writefield.F to
1145      work with multi-field files, e.g., for single-file pickup.
1146    o pkg/seaice:
1147      - bug fix in growth.F: QNET for no shortwave case
1148      - added HeffFile for specifying initial sea-ice thickness
1149      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1150    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1151      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1152    o pkg/seaice:
1153      - adjoint-friendly modifications
1154      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1155    
1156    checkpoint48e_post
1157    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1158    o dynamics: change definition of computational domain & adapt mom_fluxform
1159      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1160    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1161        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1162        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1163        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1164        inverted_barometer solid-body.cs-32x32x1
1165      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1166    
1167    checkpoint48d_post
1168    o in preparation for r*:
1169     a) use pre-computed gradient of hydrostatic potential:
1170        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1171     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1172        => affects results of glob_oce_pressure (different truncation error)  
1173      update output.txt of ideal_2D_oce & global_ocean_pressure
1174    
1175    checkpoint48d_pre
1176    o in preparation for r*:
1177      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1178      pass the 2 comp. of the grad. as arguments to momentum S/R.
1179      but for the moment, only used if it does not change the results.
1180    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1181    
1182    checkpoint48c_post
1183    Modifications in treatment of initial flux forcing controls
1184    to avoid extra storing of flux fields.
1185    
1186    checkpoint48c_pre
1187    o Added tidal_basin_2d experiment (currently 1D!)
1188    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1189    
1190    checkpoint48b_post
1191    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1192     (modification to pressure gradient not yet implemented)
1193    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1194      (for U & V) that are used for vertical advection of momentum.
1195    
1196    checkpoint48a_post
1197    o In preparation for r*, use temp. array to compute vertical transport
1198       in flux-form momentum pkg. => change results of few test-exp.
1199      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1200                        lab_sea, natl_box & plume_on_slope
1201    
1202    checkpoint48
1203    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1204    
1205    checkpoint47j_post
1206    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1207    o moved adexch from forward_step to addummy_in_stepping
1208    o added exch in ctrl_map_...
1209    o aveFreq.=0. at end of cost_final to avoid overwrite in
1210      reverse checkpointing loop
1211    o Yet more changes in gmredi:
1212      * adgmredi_calc_tensor
1213        avoiding all recomputation of gmredi_slope_limit
1214      * adgmredi_x/y/rtransport
1215        added flag for excessive storing to avoid recomp. of
1216        u/v/rtans, dTdx/y/z
1217        -> this is not really necessary and very memory-consuming
1218      * adgmredi_slope_psi:
1219        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1220      * gmredi_slope_limit
1221        re-activated full calculation of taperfct for case 'ac02'
1222    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1223    
1224    checkpoint47i_post
1225    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1226    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1227      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1228    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1229    o gmredi: fix few bugs.
1230    
1231    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1232    This will be a good checkpoint to plug into the ecco-branch.
1233    o few modif.'s to get latest version adjointed
1234      (mainly kick out code in ini_linear_phisurf)
1235    o modif's to run adjoint with exactConserv
1236    o case GM_BOLUS_ADVEC should be cleaned
1237      S/R gmredi_slope_psi should be cleaned
1238    o verification/carbon now has exactConserv=.TRUE.
1239    
1240    checkpoint47g_post
1241    o time-average AIM output: becomes independent from statvars time-average
1242      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1243    o After TAF bug fix:
1244      Tested adjoint of gmredi package.
1245      Tests were done with checkpoint47 rather than with latest
1246      checkpoint47f_post since the latter is broken for the adjoint
1247      verification/carbon/ contains both ADM and TLM gradient checks.
1248    Here they are, before they get changed/lost/stolen.
1249    Mostly modif.'s to fix numerical sensitivities.
1250    Gradient checks OK for
1251    - GM_taper_scheme:
1252      * clipping
1253      * ac02
1254      * linear
1255      * glw91
1256      * dm95
1257      * ldd97
1258    - GMREDI_OPTIONS:
1259      * GM_VISBECK_VARIABLE_K
1260      * GM_NON_UNITY_DIAGONAL
1261      * GM_EXTRA_DIAGONAL
1262      * GM_BOLUS_ADVEC
1263    in conjunction with data.gmredi parameters to be checked in
1264    in a few minutes under verification/carbon/code/
1265    
1266    checkpoint47f_post
1267    Merging from release1_p10:
1268    o modifications for using pkg/exf with pkg/seaice
1269      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1270        and SEAICE_EXTERNAL_FLUXES
1271      - pkg/exf CPP options EXF_READ_EVAP and
1272        EXF_NO_BULK_COMPUTATIONS
1273      - usage examples are Experiments 8 and 9 in
1274        verification/lab_sea/README
1275      - verification/lab_sea default experiment now uses
1276        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1277    
1278    checkpoint47e_post
1279    o created a tag prior to creating a branch
1280    
1281    checkpoint47d_post
1282    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1283      at the bottom boundary had an erroneous half slip boundary condition
1284    o added bottom drag and no slip boundary condition capabilities to
1285      oceanic pressure coordinates code
1286    o added new verification experiment global_ocean_pressure, this experiment is
1287      also described in the tutorial section of the manual
1288    checkpoint47d_pre
1289    
1290    checkpoint47c_post
1291    o Added a verification experiment for a global cubed-sphere ocean run
1292      -  verification/global_ocean.cubed32x32x30
1293      -  uses pkg/therm_seaice and pkg/bulk_forcing
1294    
1295    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1296    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1297      when using P-coordinate; only implemented for atmospheric config.
1298    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1299      NOTES: requires option NONLIN_FRSURF to be "#define".
1300    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1301    
1302    checkpoint47b_post
1303    Merging from release1_p9:
1304    o pkg/seaice
1305      - removed GOTO's and added taf directives
1306      - double precision constants to reduce the g77 (Linux)
1307        to F77 (SGI) differences reported in release1_p8
1308    o tools/genmake
1309      - added SGI options
1310    o verification/testscript
1311      - updated to that of checkpoint47a_post
1312    o verification/global_ocean.90x40x15/input/eedata
1313      - modified for SGI f77 compatibility
1314    o verification/lab_sea
1315      - added description of sea-ice model
1316      - added missing matlab routines
1317      - added test of thermodynamics parallelization
1318    
1319    checkpoint47a_post
1320    o new pkg: aim_v23
1321     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1322       for now, keep the same surface forcing as before.
1323     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1324     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1325     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1326    o add diagnostic of surface correction term in monitor output
1327    
1328    o bulk_force and therm_seaice
1329    - Two packages:  bulk_force (Bulk forcing)
1330      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1331    - Earlier integration from Stephaine Dutkiewicz
1332      and Patrick Heimbach.
1333    - Two ifdef statements for compile time,
1334       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1335    
1336    checkpoint47
1337    differentiable version of checkpoint46n_post
1338    o bug fix in quasihydrostaticterms
1339    o * "clean" adjoint code (in terms of extensive recomputations)
1340        can now be obtained for all GMREDI options (i.e. for
1341        - GM_VISBECK_VARIABLE_K
1342        - GM_NON_UNITY_DIAGONAL
1343        - GM_EXTRA_DIAGONAL
1344        - GM_BOLUS_ADVEC )
1345      * However, wrong gradient check problem remains unsolved.
1346      * New CPP options have been introduced for different
1347        tapering schemes
1348    o external_fields_load now part of differentiation list
1349    o pressure needs multiple storing;
1350      would be nice to have store_pressure at beginning or
1351      end of forward_step, e.g. by having phiHyd global (5-dim.)
1352      (NB: pressure is needed for certain cases in find_rho,
1353      which is also invoked through convective_adjustment).
1354    o recomputations in find_rho for cases
1355     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1356    o #define ATMOSPHERIC_LOADING should be differentiable
1357    o ini_forcing shifted to begining of initialise_varia
1358    o Incorporating QNVS line search routines into MITgcm
1359      (this is separate code, and therefore not under pkg)
1360      lsopt/, optim/
1361    o Updated verification/carbon/
1362      - #define GM_VISBECK_VARIABLE_K
1363      - GM_taper_scheme    = 'ldd97'    
1364    
1365    checkpoint46n_post
1366    Merging from release1_p8:
1367    o verification/natl_box:
1368      updating new external_fields_load routine
1369    o New package: pkg/seaice
1370      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1371      The sea-ice code is based on Hibler (1979-1980).
1372      Two sea-ice dynamic solvers, ADI and LSR, are included.
1373      In addition to computing prognostic sea-ice variables and diagnosing
1374      the forcing/external data fields that drive the ocean model,
1375      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1376      The implied surface heat flux is then stored in variable
1377      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1378      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1379      non-local transport term.  Because this call precedes model
1380      thermodynamics, temperature under sea-ice may not be "exactly" at
1381      the freezing point by the time theta is dumped or time-averaged.
1382      N.B.: fairly large differences in accuracy occur across
1383            different platforms/compilers; comparison between
1384            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1385            generated output gives:
1386       T           S           U           V
1387      C D M    c        m  s        m  s        m  s        m  s
1388      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1389      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1390      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1391    
1392      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1393    o GAD:
1394      - generated new common blocks to account for call of
1395        same gad routines with differing traceridentities
1396        (needed to modify tracerIdentity indices in GAD.h)
1397      - generated separate common blocks for case useCubedSphereExchange
1398        (Department of Futurology)
1399      - parameter lists to gmredi_?transport: added tracerIdentity
1400      - added new key indices to tamc.h
1401    o external_fields_load:
1402      - added this routine to TAF list
1403      - needed to make some common blocks global and additional storing
1404        along the same lines as exf package (checkpoint_lev?_directives.h)
1405    o exf:
1406      updated external forcing package
1407      - bug fixes carried over from ecco-branch
1408        (missing OBCS_OPTIONS.h in two routines)
1409      - enable easy to use "no forcing".
1410      - added exf I/O for atmospheric loading
1411      - added exf I/O for runoff data
1412      - transfered scaling between exf <-> MITgcm to exf namelist
1413    o Adding new verification experiment global_with_exf.
1414      This verification experiment is almost identical to the
1415      global_ocean.90x40x15 experiment, except that it uses
1416      the exf (and cal) package instead of the
1417      external_fields_load routine (cf README file).
1418    
1419    checkpoint46m_post
1420    o modified testscript to return -- when there are no lines of "%MON" output
1421    o added new flag "quasiHydrostatic" for QH mode
1422      and new routine quasihydrostaticterms()
1423    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1424      New routine: mom_u_coriolis_nh()
1425    o fixed sign of non-hydrostatic metric terms in u and v equations.
1426      Depend on correct sign of gravitySign.
1427    o added work.pc* to .cvsignore in aim directories using ifc
1428    o introduced flag for controllin non-hydrostatic metric terms
1429    o removed gravitySign from PARM04
1430    o switched to g77/ifc from pgf77 in aim experiments
1431    
1432    checkpoint46l_post
1433    o made convective adjustment work with pressure coordinates:
1434     - changed the direction of k-loop in convective_adjustment.F for the
1435       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1436     - adjusted the reference pressure k-index in convective_adjustment.F
1437     - adjusted the convection condition in convect.F (in analogy to
1438       calc_ivdc.F)
1439     - convective_adjustment no longer computes anything on the halos
1440     - removed the warnings about negative salinity from find_rho.F and
1441       find_alpha.F; instead the new routine look_for_neg_salinity, called
1442       at the beginning of find_rho, find_alpha, and find_beta, does a
1443       check of the entire slice, if CPP-option
1444       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1445    checkpoint46l_pre
1446    
1447    checkpoint46k_post
1448    o fixed the verification/global_ocean.90x40x15 experiment:
1449     - new bathymetry (the world according to A., JMC, and M.)
1450     - new initial fields and forcing fields (*.bin files)
1451     - new POLY3.COEFFS (for the next release one should switch to a full
1452       equation of state: JMD95P or MDJWF)
1453     - fixed several errors and redundancies in the data file
1454     - experiment uses looped cells
1455     - added matlab directory with diagnostic scripts for plotting of output
1456    
1457    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1458     - read AIM physics parameters from a file (data.aimphys)
1459     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1460    
1461    checkpoint46j_post
1462    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1463    o move wVel computation at the end of the time step, in S/R integr_continuity
1464    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1465    o update timeave pkg for wVel diagnostic.
1466    checkpoint46j_pre
1467    
1468    checkpoint46i_post
1469    o Clean up AIM package (and keep the results unchanged):
1470      include CPP_OPTION and use IMPLICT NONE in all routines ;
1471      declare all the variables _RL ; use _d 0 for all numerical constants.
1472      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1473    
1474    checkpoint46h_post
1475    o cleaned up the use of rhoNil and rhoConst.
1476      - rhoNil should only appear in the LINEAR equation of state, everywhere
1477        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1478        and the dynamical equations are all divided by rhoConst
1479    o introduced new parameter rhoConstFresh, a reference density of fresh
1480      water, to remove the fresh water flux's dependence on rhoNil. The default
1481      value is 999.8 kg/m^3
1482    o cleanup up external_forcing.F and external_forcing_surf.F
1483      - can now be used by both OCEANIC and OCEANICP
1484    checkpoint46h_pre
1485    
1486     Added code to convert surface volume flux (fresh water) into
1487     a mass flux when using P coordinates in the ocean (OCEANICP).
1488     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1489    
1490    checkpoint46g_post
1491    o Include a new diagnostic variable phiHydLow for the ocean model
1492      - in z-coordinates, it is the bottom pressure anomaly
1493      - in p-coordinates, it is the sea surface elevation
1494      - in both cases, these variable have global drift, reflecting the mass
1495        drift in z-coordinates and the volume drift in p-coordinates
1496      - included time averaging for phiHydLow, be aware of the drift!
1497    o depth-dependent computation of Bo_surf for pressure coordinates
1498      in the ocean (buoyancyRelation='OCEANICP')
1499      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1500        Theta, Salinity, and Pressure in the parameter list. This routine is
1501        presently contained in find_rho.F. This routine does not give the
1502        correct density for 'POLY3', which would be a z-dependent reference
1503        density.
1504    o cleaned up find_rho
1505      - removed obsolete 'eqn' from the parameter list.
1506    o added two new verification experiments: gop and goz
1507      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1508    checkpoint46g_pre
1509    
1510    checkpoint46f_post
1511    o Enable tangent linear (forward mode) gradient checks:
1512      - extended active file handling to g_... files
1513      - added TANGENT_SIMULATION to theSimulationMode
1514      - extended grdchk package accordingly
1515    o added tangent linear setup in verification/carbon/code_ftl
1516    o added adjoint setup in verification/front_relax/code_ad
1517    
1518    checkpoint46e_post
1519    o Added new equation of state -> MDJWF
1520      - EOS of McDougall et al., 2002, JAOT, submitted
1521      - caveat: the equation of state is only valid for a smaller (more
1522        realistic?) range of values than JMD95P/Z and UNESCO
1523      - added masks to the calculation of pressure in store_pressure
1524      - added more check values for density in check_eos (ini_eos.F), some of
1525        the old check values are out of the range of the MDJWF-eos, so don't
1526        expect perfect matches for those
1527    checkpoint46e_pre
1528    
1529    checkpoint46d_post
1530    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1531      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1532      case of pressure coordinates. eosType='JMD95Z' in
1533      combination with buoyancyRelation='OCEANICP' now causes an error.
1534    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1535      in find_alpha/beta.
1536    checkpoint46d_pre
1537    
1538    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1539      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1540    
1541    checkpoint46c_post
1542    o Changes necessary for ocean in p-coordinates
1543     -  Added new buoyancy relation = 'OCEANICP'
1544     -  Added new parameters = gravitySign (this used to be contained inside
1545        the factor dRdZ which I added when we first switched to R coordinates).
1546     X GM/Redi is not compatible (yet)
1547     X bottom drag and no-slip need to be debugged.
1548    checkpoint46c_pre
1549    
1550    checkpoint46b_post
1551    o Added new equation of state -> JMD95Z and JMD95P
1552      - EOS of Jackett and McDougall, 1995, JAOT
1553      - moved all EOS parameters into EOS.h
1554      - new routines ini_eos.F, store_pressure.F
1555    o Added UNESCO EOS, but not recommended because it requires
1556      in-situ temperature (see JMD95)
1557    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1558      unesco.f to be used with POLY3
1559    checkpoint46b_pre
1560    
1561    checkpoint46a_post
1562    o Added (atmospheric) pressure loading
1563      - new field in FFIELDS.h, etc...
1564      - new cpp flag ATMOSPHERIC_LOADING
1565    o Changed hFacC to _hFacC in calc_phi_hyd.F
1566    o Added SHORTWAVE_HEATING to some files for consistency
1567    checkpoint46a_pre
1568    
1569    checkpoint46
1570    further merges from release1_p5
1571    o new ctrl package
1572      - adopted from ECCO environment to enable optimization
1573      - added Eliassen Palm fluxes to controls
1574    o added Eliassen Palm flux controls to gradient check package
1575    o cost package
1576      - Compatible with new ctrl package
1577      - added Eliassen Palm cost hooks
1578      - modif's of existing cost functions
1579    o Adjoint-related bug fixes in kpp:
1580      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1581      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1582    o autodiff package
1583      - flow directives:
1584        + new for S/R do_the_model_io
1585        + enhanced for S/R checkpoint
1586        + new gmredi.flow
1587      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1588        disable adcommon.h/g_common.h by default.
1589      - fixed problem for adjoint of global_max
1590    o modified verification/carbon/
1591    o New setup for adjoint of global_ocean
1592    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1593    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1594    o incorporated hooks for sponge layer code (external_forcing.F)
1595    
1596    checkpoint45d_post
1597    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1598    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1599      (affects plume_on_slope "cg2d" output)
1600    o add new parameter deltaTfreesurf for free-surface time stepping
1601    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1602    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1603    o change phiMin in exp1 (to agree with documentation)
1604    o add new flags:
1605     - T,S forcing inside/outside Adams-Bashforth
1606     - turn off temp,salt advection and/or forcing
1607     - for each tracer, define internal flag for multiDimAdvection & A-B
1608    o monitor: change definition of KE to check conservation of Energy
1609    
1610    checkpoint45c_post
1611    o Removed f90 comments ("!")
1612    o Modified initialisations to enable exf package for MITgcm
1613      (without invoking ECCO_PACKAGE).
1614    o modifications to gradient check package (Martin Losch)
1615      - enable centered differences
1616      - modified format of standard output
1617    
1618    checkpoint45b_post
1619    o cleaned exchange calls in cg2d
1620    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1621    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1622      to configure barotropic setup (Martin Losch)
1623    o moved some initialisations within bi,bj loop in dynamics
1624      (TAF flow dependency)
1625    o in initialise_varia, moved call packages_init_variables
1626      before convective_adjustment_init
1627      (corresponding adjustment of TAF tape initialisation).
1628    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1629    
1630    checkpoint45a_post
1631    o compute Rho over the whole domain (extend iMin,jMin indices)
1632    o specific exchange for X-slice domain (case Ny=1)
1633    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1634    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1635    
1636    checkpoint44h_post = checkpoint45
1637    o Fix to restore differentiability:
1638      place at which packages_init_variables is called in
1639      initialise_varia is crucial for reverse control flow.
1640    o modifications in GMRedi to enable stable adjoint
1641      (corresponding modif's in thermodynamics, dynamics)
1642    o added missing hook for sponge layer code in external_forcing
1643    o modified test cost functions
1644    o storing in gad_advection (plus removal of write(0,*)!
1645    o missing headers TR1.h added in convective_adjustment routines
1646    o errorMessageUnit set non-equal zero in eeboot
1647      (conflict on some platforms, e.g. IBM SP3)
1648    o modified carbon verif.
1649    
1650    checkpoint44h_pre
1651    o vertical grid option: allow to put the Interface at the middle between
1652      2 cell-centers ; replace delZ in pkg/kpp by drF.
1653    o GM Advective form: Tracers are advected using the residual transport (=
1654      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1655    
1656    checkpoint44g_post
1657    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1658      results) ; ifdef missing in thermodynamics.F
1659    
1660    checkpoint44f_pre,checkpoint44f_post
1661    o added PTRACERS package
1662      This allows an arbitrary number of passive tracers to be integrated
1663      forward simultaneously with the dynamicaly model.
1664      + Implemented so far:
1665        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1666        - I/O and checkpointing
1667        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1668      + Not implemented so far:
1669        - KPP
1670        - OBCS
1671      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1672        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1673        line in data.pkg.
1674      + This package is disabled by default since it increases storage.
1675    
1676    
1677    o testscript: added -cleanup option
1678    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1679                 b) enable to filter 2D fields.
1680    
1681    checkpoint44e_pre,post
1682    o re-wrote convective adjustment to use pre-calculated weights
1683      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1684      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1685      Original calls to convect() still in place.
1686    
1687    chkpt44d_pre,post
1688    o added missing EXCLUDE_MONITOR flags
1689    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1690      (incompatible typ in MIN/MAX expressions caused problems
1691      on IBM SP3)
1692    o in genmake added variable MAKEDEPEND
1693      plus resetting for case SunOS
1694    o added timer_stats.c routine for IBM SP3
1695    o removed variables in dynamics
1696    !!! I forgot to create tag chkpt44d_pre !!!
1697    !!! But chkpt44d_pre = chkpt44c_post    !!!
1698    
1699    o real fresh water flux implemented with non-linear free-surface.
1700    
1701    chkpt44c_pre,post
1702    o few fix (mask in shap_s2, EmPmR in external_field_load,
1703      USE_NATURAL_BCS in solve_for_P);
1704    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1705    
1706    checkpoint44b_pre/_post
1707    o merge of relevant stuff from the ecco-branch:
1708      - genmake: removed $S64 overwrite for case SunOS
1709      - pkg/exf: update and corrections for field swapping and obcs
1710      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1711                  harmonized between ECCO and MITgcm
1712      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1713                      updated checkpointing_lev... lists for obcs
1714      - model/src: minor changes in forward_step, plot_field
1715                   added directive for divided adjoint in the_main_loop
1716      - pkg/mdsio: added mdsio_gl_slice
1717    
1718    o check parameters & config (chkpt44a_pre,post)
1719    o OBC and NonLin_FrSurf.
1720    
1721    checkpoint44
1722    o fix bug in mom_vi_del2uv
1723    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1724    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1725    o update AIM experiments (NCEP input files)
1726    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1727    o added some stuff for AD
1728    
1729    checkpoint43
1730    o added two new advection tests
1731    o added global 4x4 degree ocean test
1732    o added test of H&S94 with free surface on cube
1733    o some final mods for gradient check, adjoint,...
1734    
1735    checkpoint42
1736      Fixed AD-related problems:
1737    o Store directives up-to-date with re-arranged Adams-Bashforth
1738      (mainly thermodynamics.F)
1739    o New store directives for multi-dim. advection schemes
1740      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1741      * new common block and key passkey
1742      (mainly gad_advection.F)
1743    o Modified store directives for split of dynamics/thermodynamics
1744      for the case ALLOW_KPP
1745    o Cleaned argument list for timestep_tracer.F
1746    
1747    checkpoint41
1748    o re-formatted/added comments in prologues of key subroutines
1749      to work with protex
1750    
1751    checkpoint40
1752    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1753    o added FLT (floats) package from Arne along with demo. experiment
1754    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1755      implementation of forward-in-time forcing terms
1756    o more mods for non-linear free-surface including new variable
1757    o modified multi-dim method to work on cube
1758    o bug fix in KPP (from DM)
1759    
1760    checkpoint40pre9
1761    o added DST advection schemes
1762    o fix MPI bug on SGI's
1763    o modifications for non-linear free-surface
1764    o fixed conditionals for fixed flow/passive tracer only mode
1765    o added tension/strain form of stress tensor
1766    o changes to commenting of arguments for TAF/TAMC
1767    o added/updated many matlab scripts
1768    o added multi-dimensional advection method for tracers
1769      
1770    checkpoint40pre8
1771    o new package rw/
1772      Added method for dumping intermediate local arrays:
1773      mdsio_writetile - same as mdsio_writefield except works from inside
1774                        bi,bj loop
1775      mdsio_writelocal - same as mdsio_writetile except works for local
1776                         arrays
1777      write_local_r? - higher-level wrapper for mdsio_writelocal
1778      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1779      Example given at end of mom_vecinv.F that dumps some local arrays.
1780    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1781      control flux-form versus vector invariant code.
1782      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1783      or genmake -DISABLE ...
1784    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1785      (additional storing is now needed for case vecinv;
1786      currently nothing implemented to switch this storing off
1787      in case fluxform is used since no CPP flag available).
1788    
1789    checkpoint40pre7
1790    o bug fix in dynamics.F
1791      calc_viscosity called before k=1,Nr loop.
1792    o added some #ifdef's ALLOW_PASSIVE_TRACER
1793    o cleaned initialisations in ctrl_map_ini
1794      related to TAF
1795    
1796    checkpoint40pre6
1797    o split dynamics into thermodynamics & dynamics
1798    o corresponding split of calc_diffusivity into
1799      calc_diffusivity, calc_viscosity
1800      (kpp_calc_diff, kpp_calc_visc).
1801    o Added diffkr, kapgm to control variables
1802    o bug fix in gmredi_slope_limit for ldd97
1803    
1804    checkpoint40pre5
1805    o proper initialization of Adams-Bashforth time stepping
1806      + uses forward step for very first step of model (iter=0)
1807    o re-generated *all* output since almost all output is modified by this
1808      change (sorry but we've been putting this one off for about 2 years)
1809      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1810        *not* regenerated since they are already out of date and I don't
1811        want to create the impression that they are suddenly working.
1812    o removed KAP stuff for DEC's
1813    o modified/added many .cvsignore files in */code and */input
1814    o added new expt "solid-body.cs-32x32x1"
1815      + this uses an alternative form of ini_curvilinear_grid.F which
1816        is not necessarily any better than the current one...
1817    
1818    checkpoint40pre4
1819    o added re-initialisations of utrans,vtrans,rtrans in
1820      calc_common_factors which are crucial for TAF.
1821    o extended iMin,jMin range for calc_common_factors,
1822      calc_diffusivity
1823    o added option ALLOW_PASSIVE_TRACER
1824    o a few minor updates and fixes
1825    
1826    checkpoint40pre3
1827    o created calc_gtr1.F for gad package
1828    o split the_main_loop and re-introduced forward_step
1829    o some recomputations of nIter0 for TAMC
1830    
1831    checkpoint40pre2
1832    o Updated to latest branch of AJA, JMC
1833    o Added gradient check package
1834    o Added routines for passive tracer handling
1835    o Added carbon sequestration sensitivity experiment
1836    
1837    checkpoint39
1838     o Modifications and fixes to support TAMC
1839       (mainly missing or wrong directives)
1840     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1841       in addummy_in_stepping
1842     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1843     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1844     o Included following packages:
1845       cal: calendar
1846       exf: external forcing
1847       ecco: essential routines to control use of cal, exf
1848             (NB: this is not the full ECCO environment)
1849     o disabled some packages by default in genmake
1850    
1851    checkpoint38
1852     o see notes_c37_adj.txt
1853     o corrected wrong layer index in external_forcing_t
1854     o replaced the_main_loop/forward_step by the_main_loop
1855     o removed forceoutput from write_state
1856       (replaced criteria for initial/final state)
1857     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1858    
1859    checkpoint37
1860     o mdsio.F routine split and packaged in pkg/mdsio
1861       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1862        used unless genmake -disable=mdsio)
1863     o allow a more precise surface-geopotential gradient for the atmosphere
1864       taking into account the change in space of Alpha (=1/rho) at the surface.
1865     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1866       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1867     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1868       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1869       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1870     o Time-Average diagnostics defined as a pseudo package "timeave".
1871     o pickup files : old pickup (before c35) did not work with new code (c35
1872       and after) unless activating 2 commented lines in initialise-varia.
1873     o Non-Hydrostatic pickup file Pb fixed.
1874     o bug with Rigid-lid version (since c35) fixed.  
1875    
1876    checkpoint36
1877     o implement Crank-Nickelson barotropic time-stepping
1878     o recover Time-Average diagnostics
1879     o fix Pb in checkpoint (PR#19)
1880     o AIM become a standard package ; clean unused CPP_kees
1881    
1882    checkpoint35
1883     o subtantial rewrite of dynamics.f
1884     o allows staggered time-stepping
1885     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1886     o added bottom drag (linear + quadratic)
1887    
1888    checkpoint34
1889     o Modified exchange routines for correct reverse simulation.
1890     o Added verification output to comply with bug fix in impldiff.F
1891       as of c33 (exp2, natl_box).
1892     o Corrected store directives in dynamics.F
1893     o Corrected array boundaries in impldiff.F
1894     o Corrected array dimensions in gmredi.
1895       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1896     o Added routine GLOBAL_SUM_INT to global_sum.F
1897     o Added mdsio_gl.F for ECCO purposes.
1898    
1899    checkpoint33
1900     o Fixed bug in lower BC in impldiff.F
1901     o Fixed confusion about units of forcing arrays in FFIELDS.h
1902       namely Fu,Fv,Qnet,Qsw,EmPmR:
1903       - Removed verification/natl_box/code/external_fields_scale.F
1904         (did not differ from that in model/src)
1905       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1906         (see FFIELDS.h for description)
1907       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1908         kpp_calc.F and kpp_transport_t.F
1909       - Removed model/src/external_fields_scale.F and calls to it
1910       - verification/natl_box uses flux data with "atmospheric" sign so
1911         a special version of external_fields_load.F is used to
1912         change the data as it's read in. This way, the arrays
1913         have the right units and signs at all times tha a user could
1914         possibly use them.
1915     o Corrected genmake to delete a temporary file during configuration
1916    
1917    checkpoint32
1918     o Scaling of forcing fields moved from external_forcing.F to
1919       external_fields_scale.F, called directly after loading fields.
1920     o Surface relaxation terms added to surface tendency fields in
1921       extra subroutine.
1922     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1923       fields.
1924     o Changes in GMRedi to comply with packaging structure.
1925     o Modifications and bug fixes in KPP package.
1926     o Verification experiment for KPP added (verification/nat_box/)
1927    
1928    checkpoint31
1929     o Packages interface brought in line with defined standard
1930       -> new routines packages_...F
1931       -> changes in initialise_fixed.F, initialise_varia.F
1932       -> enables initialisation interface for ECCO package
1933     o Rescaling of external forcing fields immediately after read
1934       (removed from external_forcing.F)
1935       -> new: surface_fields_scale.F
1936       -> affects ini_foorcing.F, external_fields_load.F
1937     o Computation of surface tendencies before tendency updates.
1938       -> new: external_forcing_surf.F
1939     o Change of variable names useGMRedi, useKPP, useECCO
1940     o Further changes in dynamics.F, impldiff.F for TAMC
1941     o Tested for experiments 0, 2, 4.
1942       - not yet tested for GMRedi.
1943       - not yet tested for KPP.
1944    
1945    checkpoint30
1946     o Updates for OBCs
1947     o New experiment for test OBCs (internal_wave)
1948     o New output.txt in verification/exp4/results/
1949     o Updates for KPP: calculation of viscosity corrected, new variables
1950       kpp_dumpFreq and kpp_taveFreq
1951     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1952       and entry for T90 in genmake
1953    
1954    checkpoint29
1955     o packaged KPP and GM/Redi
1956    
1957    checkpoint28
1958     o Corrected initialization of hFacMin for difference vertical coordinates
1959     o Modified calculation of partial cell thickness to more robust algorithm
1960     o config_summary.F: replaced write_1D_... by write_0D_...
1961       read_write.F: added subroutines write_0D_...
1962     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1963       included some initialisations required for TAMC.
1964     o routine calc_isoslopes: modified sqrt computation to make it
1965       differentiable for zero argument.
1966     o routines dynamics, impldiff:
1967       included store directives and tape key computations required for TAMC.
1968     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1969    
1970    checkpoint27
1971     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1972       formulation works properly with variable resolution.
1973     o restructured the calling tree between the_model_main() and dynamics()
1974     o split initialise() into initialise_fixed() and initialise_varia()
1975     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1976       in new routine ini_psurf()
1977    
1978    checkpoint26
1979     o moved some #ifdef in optional routines to encompass everything
1980       except the argument declarations. This was using up some memory.
1981     o fixed macros like _ADT to work with both versions of Linux cpp
1982     o cleaned up some unused and uninitialized variables
1983       (helps when debugging with strict compile options)
1984     o split up CPP_EEOPTIONS.h into options and macros
1985       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1986     o patch for 2 processor JAM mode
1987    
1988    checkpoint25
1989     o updates for OBCs and NH
1990     o dramatically reduced memory usage
1991     o added "JAM" routines for use on Artic network
1992     o parameterization of convection by implicit vertical diffusion
1993     o added a diagnostic of convective index
1994     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1995       (this is was partly for OBCs and NH but also in anticipation of
1996        an explicit free-surface option)
1997     o initial state input files for U and V
1998    
1999    checkpoint24
2000     o Removed some spurious "REAL"s
2001     o Updated KPP to latest version from JPL
2002     o Added a COS(latitude) in horizontal viscosity
2003    
2004    checkpoint23
2005     o Added del^4 diffusion for salt and temperature
2006     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
2007    
2008    checkpoint22
2009     o Made many small changes: implicit none, format(i5), etc...
2010     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
2011    
2012    checkpoint21
2013     o Introduced new I/O package that supports direct-access records (mdsio.F)
2014     o Split-up mid-level I/O routines
2015     o Updated input data for experiments 0,1,2,4 and 5
2016     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
2017    
2018    checkpoint20
2019     o Tidied up open-boundaries some more
2020     o Added non-hydrostatic code
2021     o Fixed some input data
2022     o Modified MPI start-up to work in "coupled" context.
2023    
2024    checkpoint19
2025     o Tidied up directory structure for verification experiments.
2026     o Added new code for open boundaries.
2027     o Corrected advective terms near boundaries.
2028     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
2029     o Implemented free-slip/no-slip BCs and del^4 dissipation.
2030     o Split default parameters out of ini_parms.F into set_defaults.F.
2031    
2032  checkpoint18  checkpoint18
2033   o Further changes for optional code generation with   o Further changes for optional code generation with
2034     CPP - ugh!     CPP - ugh!

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