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revision 1.7 by adcroft, Mon Jun 22 16:24:50 1998 UTC revision 1.407 by heimbach, Thu Dec 9 15:37:25 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 add horizontal bi-harmonic viscosity for vertical velocity
7      - new parameter viscA4W (defaults to viscA4)
8      - affects only non-hydrostatic code
9      - to be done: no-slip lateral boundary conditions
10    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
11    o implement Implicit Vertical advection for pTracers
12    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
13      (implemented also for implicit vertical diffusion & advection)
14    o OBCS: extend application of tracer open boundary conditions
15      to a strip beyond the boundary of width Olx/Oly
16    o add call monitor to TAF set of required calls (flow directives)
17      and include in natl_box_adjoint
18    o untangle a few ifdefs related to cost, ctrl, autodiff
19      untangel a few ALLOW_ECCO_OPTIMIZATION
20    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
21      (theta2, salt2 in ecco_cost_weights)
22    
23    checkpoint56c_post
24    o OBCS as control variables
25      - update ctrl_ad_diff.list, obcs_ad_diff.list
26      - remove balance of obcs controls from default
27      - fix index bug nobcs in ctrl_init
28      - fix dummy fields filen in ctrl_pack
29      - add dummy weights for obcs
30    o lsopt: comment out fort.94 output
31    o optim:
32      - remove unnecessary header files
33      - adjusted namelists
34      - add xerbla.F to Makefile
35    o exf:
36      - multiple modifications of exf_check_range
37      - unit change in exf_init_runoff from [m/year] to [m/s]
38    o mdsio:
39      - i/o-vector change debugLevel from debLevA to debLevB
40    
41    checkpoint56b_post
42    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
43      is called from DO_THE_MODEL_IO
44      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
45      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
46      - clean up PTRACERS_WRITE_TIMEAVE a little
47    o add another verification experiment that tests both the cfc-pkg and
48      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
49      reactive tendencies treated inline with regular timestepping
50    o testreport previously did a lousy job of comparing small numbers, so
51      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
52      implemented in the little c-progam tmp_cmpnum.c which is embedded in
53      testreport.
54    o ptracers_monitor: bug fix for MPI
55    
56    checkpoint56a_post
57    o GCHEM: finish reorganizating the package
58      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
59        (introduces another 3D-array for each passive tracer, but only if
60        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
61        gchemTendency is not needed because the timestep is done separately)
62      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
63      - GCHEM is now---more or less cleanly---separate from PTRACERS
64      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
65        so clear to me how that should be done in a general way.
66    o CFC: improve formatting of output in CFC_ATMOS
67    o PTRACERS:
68      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
69        that ALL experiments with ptracers enable can be checked. This makes
70        GCHEM_MONITOR obsolete.
71      - include a runtime parameter PTRACERS_monitorFreq that defaults to
72        monitorFreq
73      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
74    o add PTRACERS (PTR0[1-5]) to testreport output
75    o exf_check_range:
76      * default changed to .TRUE.
77      * will check values for niter0 if debLevA, every timestep if debLevB
78      * STOP in exf_check_range if 'out of range'
79      * range chosen generous to allow for potential extema
80      TBD: a version with stricter range
81           permitted range would be runtime parameters
82    o GMredi:
83      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
84      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
85      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
86    o GCHEM:
87      - move call to GCHEM_FORCING_SEP, so that it is now called before
88        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
89      - introduced a useGCHEM runtime flag and applied it everywhere.
90      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
91        this flag is now only visible within GCHEM-pkg routines.
92      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
93        be replaced by a 3D array that is computed before thermodynamics; for
94        this, the tracer ID iTracer had to be included into the parameter list
95        of ptracers_forcing
96      - set up forward_step to call gchem_forcing, that will replace
97        gchem_forcing_int in ptracers_forcing
98      - cleaning up
99    o small cleaning of exch2: remove files that are also in eesupp/src
100    
101    checkpoint56
102    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
103    o mnc: cleanup "full" files--fixes out-of-memory problem
104    o ECCO-GODAE
105      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
106      * fully merged and updated from SIO code
107        windstress sign change affects
108        - exf_inscal_[u/v]stress
109        - sign of xx_tau[u/v] adjustments
110        - signs in cost_scat
111      * ctrl_get_gen: avoid update of tau[u/v] for first few days
112      * natl_box_adjoint updated and compressed
113      * 2-level checkpoint switch added
114        (tested in EXP. 1 of natl_box_adjoint)
115      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
116    o SVD
117      * first complete, non-hacked version for SVD calculations
118      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
119        performed via direct access files admtlm_vector.it????
120        (via ctrl_[un]pack)
121      * optimcycle is used for ARPACK iteration counter
122        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
123      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
124        and add linear transforms where necessary
125      * controls are initial/final SST, SSS (can be extended; need to check
126        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
127    o mdsio: filename info to both stderr, stdout
128    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
129      from sign change
130    
131    checkpoint55j_post
132    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
133      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
134    o add consistent build directories and .cvsignore files to verification
135    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
136    o make all subroutines 30 or less characters in length for certain older
137      compilers to work (a thorough search only turns up two routines in
138      pkg/ptracers)
139    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
140      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
141    
142    checkpoint55i_post
143    o change arrays for total vertical diffusivity (2.D if explicit,
144      3.D if implicit) ; each ptracer uses its own background value.
145    o added mnc/NetCDF output capability to ocn_compon_interf
146      - added bits to verification/cpl_aim+ocn so that it can run on
147        ITRDA and other clusters without the mpirun "-wd" option
148    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
149      configuration
150    o give MNC the ability to create additional files rather than
151      exceeding a specified file size limit "MNC_MAX_FILESIZE"
152      - the default is just less than 2GB which is a practical limit
153        on many systems
154    o Compute the non-local term using either KPP vertical diffusivity (=default)
155       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
156    
157    checkpoint55h_post
158    o add verification test "vermix"
159    o remove all the *_ioinc flags and replace with the single global
160      outputTypesInclusive flag
161    o allow to set a vertical profile of vertical diffusivity for T & S
162    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
163    o useMNC moved from data.mnc to data.pkg
164    
165    checkpoint55g_post
166    o Renaming carbon AD experiments to comply with testreport conventions
167    o Updating adjoint of Held-Suarez hs94.1x64x5
168    o Fixing directives for non-ECCO forward_step, after ECCO directives
169      have been fixed to avoid recomp. of do_oceanic_phys
170      Works well for global_ocean.90x40x15,
171      but recomp. issue remains for carbon
172    o Updating adjoint output for natl_box_adjoint after
173      pkg/ecco has been modified (see taga c55d_post)
174    
175    checkpoint55f_post
176    o rename to timeave_init_fixed
177    
178    checkpoint55e_post
179    o some delicate re-shuffle of store directives to avoid one
180      extra call of do_oceanic_physics
181      affects ecco_the_main_loop.F, do_oceanic_physics.F
182      checkpoint_lev1_directives.h
183    o NB: this may break global_ocean adjoint temporarily,
184      but it is clear how to fix it. Will do later, need this now.
185    
186    checkpoint55d_post
187    o ECCO specific cost function terms (up-to-date with 1x1 runs)
188    o ecco_cost_weights is modified to 1x1 runs
189    o modifs to allow observations to be read in as
190      single file or yearly files
191    o enable to read exf forcing fields as either
192      single file or yearly files (flag useExfYearlyFields)
193    checkpoint55d_pre
194    
195    o switch between 2-level and 3-level checkpointing
196    o add ability of MNC to write local and "partial" (eg. 2D slices where
197      the full 3D field is never actually stored) arrays to NetCDF files
198      with the correct (that is, the complete multi-dimensional) set of
199      array indicies
200      - used in mom_vecinv() to write the diagFreq output
201      - tested (demonstrated) in verification/aim.5l_cs
202    o further mnc-ification
203      - add verification/lab_sea to the list with mnc setups
204      - fix undefined mnc v-names in cd_code
205      - add kpp to mnc output (both snapshot and timeave)
206    o non-hydrostatic code
207      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
208        in calc_gw.F
209      - defaults to viscAh
210      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
211        friction or Leith) in non-hydrostatic mode, as long as there is
212        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
213    o pkg/cost
214      extend simple cost functions to treat time mean quantities
215      (T,U,V) via cost_accumulate_state from cost_tile
216    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
217        be 2 times larger than the minimum size the advection scheme requires.
218        now get a perfect conservation of salt in advect_cs test-exp (updated)
219    o GGL90 (Gaspar's TKE mixed layer)
220      - add horizontal diffusion of TKE, requires exchanges in
221        do_fields_blocking_exchanges, horizontal diffusivity is zero by
222        default. In OPA there is no horizontal diffusion of TKE but the
223        mixing coefficients are computed from a horizontal average of TKE of
224        6 points or so. I think that diffusion has a little more physical
225        justification.
226      - clean up ggl90_calc in the hope of reducing memory usage (this hope
227        was in vain)
228      - mask tke-variable in ggl90_init
229    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
230    o fix biharmonic diffusion on CS-grid.
231    o more obcs stuff
232      - added obcs_external_fields_load as an alternative to the EXF-pkg option
233        for reading boundary values. This routine is called from
234        obcs_prescribe_read
235      - updated obcs_check
236      - changed sponge layer relaxation parameter units for days to seconds
237      - turned off sponge layer by default
238      - changed argument list of OBCS_CALC to myTime+deltaTclock
239      - fixed about 35 bugs in obcs_external_fields_load
240    
241    checkpoint55c_post
242    o obcs stuff
243      - new runtime flags useOBCSprescribe, useOBCSbalance
244      - re-arranged obcs_calc
245      - moved exf_getobcs to obcs_prescibe_read
246        obcs_prescibe_read is called after ORLANSKI stuff
247        and independent of it (executable can contain all).
248      - updated obcs_check
249      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
250        These may be necessary only if tangential velocities are
251        prescribed at OB, not sure, needs testing.
252    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
253      which simplifies the calls and passes the ifc check-bounds test
254    
255    checkpoint55b_post
256    o add a 2D scalar, Z location, exchange_2 routine.
257    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
258      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
259      affects advect_cs results (for the wrong reason): update output.txt
260    o use a more standard discretization for biharmonic viscosity ;
261     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
262      affects results of dome set-up: update output.txt
263    o fix gad_advection.F (CubedSphere part), back to version 1.23
264    o fix bug in mom_vi_del2uv.F (CubedSphere part).
265    
266    checkpoint55a_post
267    o merged code to
268      * prescribe/read time-dependent open boundaries
269        (works in conjunction with exf, cal)
270      * sponge layer code for open boundaries
271      * each boundary N/S/E/W now has its own CPP option
272        (healthy for the adjoint)
273    
274    checkpoint55
275    o up-to-date adjoint of previous breaks
276      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
277      - global_ocean_ebm: adjoint still needs fix (TLM ok)
278      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
279      - carbon: * remove tr1-related adjoint verification
280                * add ptracer as control variable
281    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
282      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
283    
284    checkpoint54f_post
285    o in verification/carbin/ remove experiment related to
286      ALLOW_PASSIVE_TRACER (array tr1 etc)
287      code_ad/ input_ad/ results_ad
288    
289    o add two new packages
290      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
291        + subject to optimization (memory)
292      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
293        + subject to reordering (many GOTOs in the original code)
294        + so far opps is called for every (i,j) point, and then operates in
295          the vertical; one may want to reorder the scheme in order operate in
296          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
297          fields)
298    o overhaul of IO so that we now have flags for MDSIO and/or MNC
299      - all verification tests compile and run with linux_ia32_g77
300      - defaults are compatible with current input files--nothing
301        should change if you were not previously using MNC
302      - MNC output has been added in numerous places (eg. timeave)
303        but there are still a few writes not yet do-able with MNC
304        (this is in progress)
305      - flags now allow for either/or/both use of MDSIO and MNC and
306        documentation will soon follow
307      - numerous small formatting cleanups for ProTeX
308    o add version info (via BUILD_INFO.h) to MNC and stdout
309    
310    checkpoint54e_post
311    o add two new packages
312      - pp81 (Packanowski and Philander, 1981), Richardson number and
313        stratification dependent mixing
314      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
315      - these scheme operate in a similar manner as KPP (without ghat, of
316        course), however there is only one diffusivity that is used for both
317        temperature and salinity (and passive tracers)ç
318    o add offline package
319    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
320      provided by Stephanie Dutkiewicz
321    o genmake2: add ability to search for C compilers and cleanup test output
322      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
323    
324    checkpoint54d_post
325    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
326    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
327      leading to additional shift by 5 days each year of integration
328       (i.e. leading to considerable offset over the years)
329    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
330    o start with no AB and no initial filtering (staggerTimeStep):
331      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
332    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
333      (external loading & cpl import/export stay in forward_step.F)
334    o update coupling interface to work with new staggerTimeStep
335    o change MDSIO ptracers_pickup.
336    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
337    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
338    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
339    
340    checkpoint54c_post
341    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
342      this affects (truncation error) output.txt of test-exp:
343       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
344    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
345    o change Qnet to always be the net heat flux, (+upward).
346      affects (truncation error) output of natl_box exp.: updated
347    o define the max number of passive tracers in PTRACERS_SIZE.h
348    o start to test mnc routinely in exp0
349    o add sea-ice loading (sIceLoad) as a new forcing field.
350    
351    checkpoint54b_post
352    o add testreport "-j JOBS" option for parallel builds (tested and pretty
353       impressive on Altix and Opteron systems)
354    o diagnostics can now write NetCDF files through the mnc package
355    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
356    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
357    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
358      affects (truncation error) output of lab_sea & natl_box exp.: updated
359    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
360    
361    checkpoint54a_post
362    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
363    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
364    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
365    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
366      + internal_wave (shift in writing cg2d_ini_res)
367    checkpoint54a_pre
368    
369    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
370      - modified verification/lab_sea and natl_box_adjoint accordingly
371    
372    checkpoint54
373    checkpoint53g_post
374    o prepare splitting of thermodynamics: store convect.counter in common block
375    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
376      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
377    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
378    o new parameter "nShapS": allow to treat differently S from T (nShapT)
379    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
380    o restore adjointability
381    
382    checkpoint53f_post
383    o modifications that affect AIM experiment results (update output.txt):
384      - no advection of S at top interface Nr (pkg/generic_advdiff)
385      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
386    o AIM pkg:
387      - include stability function into surf.Flux derivative relative to Tsurf
388      - calculate clear-sky radiation & surface temp. change (for diagnostics)
389    
390    checkpoint53e_post
391    o merged cylindrical coord configuration
392    o added rotating_tank experiment
393    checkpoint53e_pre
394    
395    checkpoint53d_post
396    o faulks upgraded: re-generate output.txt that have changed:
397       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
398    o Added Bryan and Lewis, 1979, vertical diffusivity profile
399    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
400    o added Sadourny discretization of Coriolis
401      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
402      - re-enabled use of omega3 (useAbsVorticity)
403    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
404      vector-invariant equations
405      - note: does *NOT* yet use same variable visc. for no-slip BC's.
406    o recoded the lateral boundary conditions for non-hydrostatic w, this time
407      hopefully without new bugs
408      - still to do: biharmonic friction for non-hydrostatic w
409    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
410    o regenerated output for global_ocean_ebm (using -ieee)
411    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
412      of mom_common/
413      - simple re-arrangement of instructions within computing loop
414    checkpoint53d_pre
415    
416    checkpoint53c_post
417    o new version of coupler for AIM+thSIce and Ocean models
418     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
419     - land: change Evaporation of snow
420     - aim with thSIce: fix bug in snow-precip.
421    o changes to calc_gw.F
422     - bug fix for w^2 term near the bottom boundary
423     - (hopefully) improve the lateral slip boundary condtions for use with
424        partial/looped cells
425      - because the bug fix changes two verification experiments anyway (exp5
426        and plume on slope), change the lateral boundary condition from half slip
427        to the value of no_slip_sides
428    o ebm package wasnt quite up to the parallel task. Fixed that.
429    o Adjoint of EBM package + verification
430      * TLM OK
431      * ADM not sufficient accuracy yet (needs further testing)
432    
433    checkpoint53b_post
434    o Commiting new energy balance model to repository
435      * package is pkg/ebm
436      * verif. is verification/global_ocean_ebm
437      * references are in ebm_driver.F
438    C      * X. Wang, P. Stone and J. Marotzke, 1999:
439    C        Global thermohaline circulation. Part I:
440    C        Sensitivity to atmospheric moisture transport.
441    C        J. Climate 12(1), 71-82
442    C      * X. Wang, P. Stone and J. Marotzke, 1999:
443    C        Global thermohaline circulation. Part II:
444    C        Sensitivity with interactive transport.
445    C        J. Climate 12(1), 83-91
446    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
447    C        Destabilization of the thermohaline circulation
448    C        by atmospheric eddy transports.
449    C        J. Climate 7(12), 1870-1882
450    o Will need long integration testing.
451    checkpoint53b_pre
452    
453    o created pkg/mom_common in preparation for variable viscosity code
454    o renamed and split ini_mnc_io
455    o pkg/land: only liquid water can diffuse or run-off
456    o AIM using land: soil wetness availability account for snow
457    o added printMapIncludesZeros to EEPARMS namelist
458    
459    checkpoint53a_post
460    o restore TAMC compatiility for exf_constants.h
461      (no usage of _d in .h)
462    o Additional storing in KPP in an attempt to fix
463      TAMC problem with adjoint of KPP code.
464      (no success...)
465      Identical code works fine with TAF.
466    o Fixed verification/natl_box_adjoint experiments.
467      Initial conditions for Experiments 4 and 5 are now
468      set to "SEAICE_initialHEFF=0", which is more reasonable,
469      and hence gives results closer to that of Experiment 2.
470      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
471    
472    checkpoint53
473    o stable checkpoint with up to date adjoint
474      TLM tests only run for 1st grdchk at the moment. Its unclear if
475      this is a code problem or a problem with resetting code for g_
476      variables that is being autogenerated wrong.
477      Otherwise:
478       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
479       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
480         are both still in chaos following their security messes.
481    
482    checkpoint52n_post
483    o various build (mostly genmake2) changes including:
484      - ability to build/run more easily within Cygwin and MacOS X
485      - more complicated Makefiles with a stronger dependence on Gnu Make
486    o pkg/seaice modifications
487      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
488        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
489        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
490      - changed proxy for geostrophic velocity and updated
491        verification/lab_sea/results/* accordingly
492      - removed ADI dynamic solver from pkg/seaice
493      - replaced all occurrences of 1/CSTICE or 1/CSUICE
494        they caused a segmentation fault under certain circumstances
495      - removed unused field WATR
496    o bug fix in exf-package:
497      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
498         now reflect that.
499    o small fixes in the cal-package:
500      - set reference date to first of January for the 'model'-calendar
501      - failing of cal_CheckDate in cal_FullDate now actually results in a
502        warning
503    o small modifications in exf-package to increase flexibility:
504      - change climtempfreeze from a constant to a runtime parameter that
505        is specified in data.exf_clim (default = -1.9)
506      - introduce runtime parameter windstressmax (default = 2.0) that is
507        specified in data.exf
508    o fix in pkg/thsice:
509      - update Evap (Tsf changes) to be consistent with Latent heat flux
510      - maintain snow precipitation unchanged (even if Tsf >=0).
511     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
512    
513    checkpoint52m_post
514    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
515      this does not change any of the results, because myIter=0 in swfrac always
516      lead to jwtype=2 (the default anyway), but the call makes little sense
517      as a default
518    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
519    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
520      atmospheric model (AIM) to use it ; add a "slab ocean" component.
521    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
522    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
523    o extending useSingleCpuIO option to work with new exch2 I/O format
524      - old-style, missing-tile I/O is still accessible by defining CPP
525        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
526    o monitor package can write to NetCDF files and/or STDOUT
527    o fix re-definition bug in MNC_GRID_INIT_ALL()
528    o doc/api_reference added
529      - a framework for building an API Reference Manual using all
530        the "protex" comments embedded in the code
531      - see pkg/generic_advdiff, pkg/mnc for examples
532    o MNC:
533      - make myThid the last argument for all subroutines
534      - new default for the grid files: NO halos
535      - add useMNC and other run-time flags
536      - separate per-file-group handling of the unlimited dimension
537      - early initialization of MNC w/ flags read at the eeboot stage
538        and lookup tables set in initialize_fixed
539      - write all MNC output to a freshly-created directory
540    o thermodynamics sea-ice (thsice) is now tested with testreport.
541    o test exp. advect_cs: use the standard cs32 grid ; update output.
542    o Added functionality to grdchk:
543      pick global i,j,k position (or nearest wet) where to perform check.
544    
545    checkpoint52l_post
546    o new land formulation:
547      a) use ground enthalpy as prognostic variable to ensure exact
548         energy conservation.
549      b) account for water temperature and for latent heat of freezing
550         in all processes (rain, run-off, ground storage)
551      c) compute surface and ground temperature implicitly.
552    o aim_v23 modification for new land model:
553      a) Treat separately land / ocean / sea-ice surface fluxes
554         to allow implicit computation of land & sea-ice surface temp.
555      b) add snow precipitation.
556    checkpoint52l_pre
557    
558    o fix problem (when 1 tile is empty) in min/max monitor.
559    o fix bug in timeAve (u,vZetatave in common block)
560    o no restoring terms under ice for pkg/seaice
561    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
562    o bug fix for pkg/seaice pickups
563    o change MNC call locations and add coordinate attributes
564    o mask vorticity at the corner ; affects global_ocean.cs output
565    o fix ini_curvilinear_grid ; test CS experiments with mpi
566    o aim.5l_cs: modify sea-ice fraction input file ; update output
567    o exf: Adding simple range check routine for exf fields after read
568    
569    checkpoint52k_post
570    o removed top-level directory "diags"
571      - we migrated these functions to pkg/timeave a long time ago
572    o fixed bug introduced in pkg/monitor
573    o accuracy ctrlprec = 32 insuffient for gradient checks using
574      averaged fields (I/O via cost_averages)
575      -> use ctrl.h in active_file*.F to control I/O precision.
576    o paramter list of CALL ADTHE_MAIN_LOOP
577    o added initial do_the_model_io to ecco
578    o set all ...Freq to zero after cost_final
579      taveFreq, dumpFreq, pChkptFreq
580    o MAIN and ECCO differentiability restored
581    
582    checkpoint52j_post
583    o fix nchklev in tamc.h for global_ocean...
584    o Bringing flow and store directives up-to-date
585    o Really weird thing!
586      call do_the_model_io from the_main_loop with parameters
587      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
588      TAF places a faulty re-call of initialise_varia
589      after cost_final call which should not be there!
590    checkpoint52j_pre
591    
592    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
593      error messages
594    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
595    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
596      debug output
597    o modfied mdsio_writefield.F to handle non-global files under exch2
598    o update AIM Cubed-Sphere exp (aim.5l_cs):
599      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
600    o update AIM Equatorial Channel exp:
601      use standard aim_v23 pkg and change the SST fields to be more realistic.
602    o globalFile now works with exch2
603    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
604      mon_vort3.F to make exch2 friendly with >1 tile per cube face
605    o limit timeave output for hi-res integrations
606    
607    checkpoint52i_post
608    o removed CPP_EEOPTIONS.h from verification/*/code
609    o updated the tiling for global_ocean_pressure
610    checkpoint52i_pre
611    
612    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
613      the old pkg/aim).
614    
615    checkpoint52h_pre
616    o shortened offending lines in exch2_send_rx?.template
617    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
618    o genmake2: add build & execute test for NetCDF code
619    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
620      old grid files, moved CPP_EEMACROS.h to pkg/exch2
621    o added useSingleCPUIO flag to monitor.F and mon_out.F
622    o added temporary hack for sea-ice dynamics on the cube:
623      metric terms are ignored and it is assumed that
624      there is no sea-ice on cube faces 1, 2, 4, and 5.
625    
626    checkpoint52f_post
627    o added exch2 cube routines to pkg/exch2
628    o modified hs94.cs-32x32x5 to use it
629    o added new grid files to hs94.cs-32x32x5
630    checkpoint52f_pre
631    
632    checkpoint52e_post
633    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
634      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
635    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
636      to work with implicit vertical advection and AB ;
637    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
638    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
639     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
640    checkpoint52e_pre
641    
642    o fix bug in impldiff when Nr=1 or Nr=2.
643    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
644    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
645    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
646      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
647    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
648    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
649    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
650    
651    checkpoint52d_post
652    o re-tiled many expts to allow comparison in multi-processor mode
653      - updated output accordingly
654      - changed hs94.128x64x5 to use intial T from file rather than use the
655        random number generator
656    o add infrastructure in model routines for fizhi and gridalt packages
657    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
658    o changes to permit hi-res, cubed-sphere, configuration
659      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
660      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
661      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
662        of surface winds for the cube
663      (A verification experiment, based on global_ocean.cs32x15, but with
664       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
665       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
666       complete with example surface forcing files and matlab scripts to look
667       at the output and compare it with that of global_ocean.cs32x15.)
668    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
669       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
670       to conform to the common rule.
671    o check-in the first version of the coupler + interfaces for multi-components
672       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
673       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
674       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
675       - ocean and atmos. share the same horizontal grid (no interpolation).
676       - exchanges between component and coupler is done in forward_step
677    o new verification experiment, cpl_aim+ocn:
678       coupled ocean - AIM atmosphere on cs32 grid.
679    
680    checkpoint52d_pre
681    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
682    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
683    
684    checkpoint52c_post
685    o Fixing OPTIONS files for use of exf:
686      - ALLOW_ECCO not needed
687      - ECCO_CPPOPTIONS.h should not be included from
688        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
689        as has been the case in the past
690      - All cal/exf related options are currently set in
691        single header file. Should remain so until we
692        agree on a consistent new policy.
693    o Removed all CPP options for cal package.
694      cal has no more CPP options.
695    o modified STOREs in GAD_ADVECTION
696    o corrected key comp. for passkey
697    
698    checkpoint52b_post
699    o new version: "thsice" of thermodynamic sea-ice pkg:
700     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
701     - modify fluxes but do not change theta directly;
702     - light cleaning of bulk_force pkg (still needed with thsice).
703     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
704       + output_thsice.txt to test thsice & bulk_force pkgs.
705    o put back grid & coriolis monitor output.
706    checkpoint52b_pre
707    
708    o call "do_the_model_io" at the beginning (=> dump initial state)
709    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
710    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
711      (need info on NUMBER_OF_PTRACERS)
712    o missing PTRACERS headers in some routines
713    o default tamc.h in pkg/autodiff supposed to crash
714      to ensure proper customization
715    
716    checkpoint52a_post
717    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
718      - moved surfaceTendencyTice from pkg/seaice to main code
719      - subroutine FREEZE_SURFACE now limits only surface temperature
720        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
721        => new output.txt for global_ocean.cs32x15 & global_with_exf
722      - keep the old version of FREEZE for backward compatibility;
723        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
724      - corresponding modifs for TAF directives
725    o added surface flux output variables to TIMEAVE_STATVARS
726    o time-averaged output for pkg/ptracers
727    o fix problem with ECCO-related divided adjoint
728      snapshot file was missing some ad-variables,
729      but no warning issued by TAF
730    
731    checkpoint52a_pre
732    o some bug fixes for #undef REAL4_IS_SLOW
733    
734    checkpoint52 = ecco_c52_e35
735    o after testing adjoints of checkpoint51u_post
736    
737    checkpoint51u_post
738    o this is the post-merge tag of the ecco-branch
739      (needs another clean checkout and re-testing)
740    o various natl_box_adjoint configs and results
741      but no input fields
742    o obcs adjoint not yet merged!
743    o adding ECCO global 1x1 and 2x2 degree configs
744    o updated/extended some store directives for seaice
745    o pkg/ecco now containes ecco-specific part of cost function
746    o top level routines the_main_loop, forward_step
747      supersede those in model/src/
748      previous input data.cost now in data.ecco
749      (new namelist ecco_cost_nml)
750    o in ctrl/ cleaned some cross-dependencies and updated CPP options
751    
752    checkpoint51t_post
753    o this is the pre-merge tag of the ecco-branch
754    
755    checkpoint51s_post
756    o cleanup: removed various obsolete #define-s
757    o pkg/grdchk
758      - renamed 'ph-grd 3' to 'grad-res'
759      - merged from ecco-branch
760        (remaining bug fixes for obcs gradient checks)
761      - additional high-precision output for testreport
762        (grep for 'precision_grdchk_result')
763    
764    checkpoint51r_post
765    o cleaned up or removed CPP_OPTIONS.h files
766    o updated results for some of the tests to reflect the new
767      optfiles (-ieee: -O0 instead of -O3)
768    
769    checkpoint51q_post
770    o cd_code:
771      - moved cd_scheme.F -> cd_code_scheme.F
772      - separate read_checkpoint from cd_code_ini_vars.F
773      - separated cd_code part from write_checkpoint
774      - updated AD_SOURCE, generated .flow
775      - added CD_CODE_VARS.h to the_main_loop
776      - Moving cd_code specific store dir.s to pkg/cd_code
777    o ctrl package totally restructured
778      - pack/unpack now optional and decoupled from
779        xx_/adxx_ I/O
780      - ctrl_pack/unpack cleaned
781        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
782      - confined inclusion of AD_CONFIG.h to where necessary.
783    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
784    
785    checkpoint51p_post
786    o create initial cd_code package
787      - WARNING: the initialization of fields within packages
788        is broken because INI_FIELDS (where READ_CHECKPOINT is
789        called) is called *before* PACKAGES_INIT_VARIABLES.
790        This seems to be backwards since
791        1) its important to initially zero the entire field including
792           the "halo" region
793        2) zeroing needs to be done *before* reading pickup info
794           and the pickup call might or might not happen in any
795           particular run
796      - this needs an overhaul for R2
797    o cleanup verification/*/code/GMREDI_OPTIONS.h
798    o cleanup testreport
799    
800    checkpoint51o_post
801    o bringing AD-related verif's up to date with genmake2
802      - carbon/
803      - global_ocean.90x40x15/
804      - hs.94.1x64x5/
805      - (front_relax/ )
806    o (more) consistent directory structure for AD-related verif.'s
807    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
808    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
809    o bug fix in find_alpha.F for MDJWF:
810      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
811        change rho -> rho-rhoConst
812      - replace call find_rho to find_rhonum
813    o initialisation of rFlx extended to full array (required by TAF)
814      and shifted to thermodynamics
815    o removed PTRACERS.h in ptracers routine
816    o added surfacetendencyPtr to S/R parameter list pracers_forcing
817    o Correcting initialisations for fVerU, fVerV.
818    o helping TAF to recognize dependency on kUp for
819      fVerU, fVerV
820    o Replacing delZ by delR in pkg/ctrl/
821    checkpoint51o_pre
822    
823    o undid all of cp51 pending some cleanups and discussion
824    o added the [#include "AD_CONFIG.h"] statement to all files that need
825       it for adjoint/tl #defines
826     o re-worked the build logic in genmake2 to support AD_CONFIG.h
827     o removed tools/genmake since it no longer works
828    
829    checkpoint51n_post
830    o modifications to make FREEZE flux visible to pkg/kpp
831      - moved surfaceTendencyTice from pkg/seaice to main code
832      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
833      - subroutine FREEZE now limits only surface temperature
834        (this means new output.txt for global_ocean.90x40x15,
835         global_ocean.cs32x15, and global_with_exf)
836    o added surface flux output variables to TIMEAVE_STATVARS
837    
838    checkpoint51n_pre
839    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
840    o added [#include "AD_CONFIG.h"] to all files that use the following
841      defines:
842      - ALLOW_ADJOINT_RUN
843      - ALLOW_TANGENTLINEAR_RUN
844      - ALLOW_ECCO_OPTIMIZATION
845    
846    checkpoint51m_post
847    o incorporating changes to get TAMC/TAF working in genmake2
848      - added new TAMC/TAF targets to the Makefile
849      - various cleanups related to package handling
850      - these changes should have no impact on the forward model
851    
852    checkpoint51l_post
853    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
854     - faster algorithm for cal_addtime.F
855     - higher precision arithmetic, where needed
856     - pkg/exf *startdate variables changed from calendar date to
857       model integration time
858    
859    checkpoint51l_pre
860    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
861    o enable to apply restoring on S & T only in a latitude band.
862    o update output (external_forcing_surf modif. change truncation errors)
863       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
864    
865    checkpoint51k_post
866    o change default to: useNHMTerms=.FALSE.
867     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
868       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
869     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
870        exp1, ideal_2D_oce
871     - change data file of oceanic exp (leave the results unchanged for now)
872       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
873    o set gravitySign automatically according to the vertical coordinate used
874      (and change sign: back to "logical" value: +1 when R increases downward)
875    o added an include barrier to the default CPP_OPTIONS.h and
876      removed the #include "PACKAGES_CONFIG.h" from it
877    o fix a bug in mom_fluxform (from chk51j_post)
878    
879    checkpoint51j_post
880    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
881    o adjusted some flow directives (dynamics, thermodynamics)
882    o added cubed-sphere case to test cost function
883    o heckpoint_lev?_directives.h now include
884      pkg-specific directives, whenever those are enabled.
885    o Moving pkg-specific flow directives to corresponding pkg
886      Moving pkg-specific differentiation list to corresponding pkg
887      Moving pkg-specific checkpoint-lev storing to corresponding pkg
888      ---> conventions are
889           - pkg_ad.flow
890           - pkg_ad_diff.list
891           - pkg_ad_check_lev?_dir.h
892    
893    checkpoint51i_post
894    o merge of the branch-genmake2
895      - knowingly breaks the older genmake
896      - automatic generation of all ALLOW_${PKG_NAME} defines
897      - new testreport supersedes older testscript
898    o large number of package inclusion and header cleanups
899    checkpoint51i_pre
900    
901    o new output for adjoin of global ocean vector invariant
902    o fix for checkpoint of thermodynamic seaice and bulk_force
903    o Steph gchem various cleanups
904    
905    checkpoint 51h_pre
906    o fixed some single quotes
907    o modify gchem pkg to be more versatile
908    o modifications to clean up dic pkg
909    o add pkg/cfc
910    
911    checkpoint51g_post
912    o provide links for ARPACK and ADM*TLM
913    o start removing verification/vero/
914    o update AD-related stuff
915      (in particular some IF-statements in model/src/ routines)
916    o adding to verification/global_ocean.90x40x15/ adjoint of
917      vector invariant setup
918    
919    checkpoint51f_post
920    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
921    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
922      of tracer Green's fucntions for ocean inversion project.
923    
924    checkpoint51f_pre
925    o Added on-the-fly spatial interpolation capability
926        "USE_EXF_INTERPOLATION" to pkg/exf.
927      - This is a temporary Cartesian-grid hack until
928        the super-duper ESMF coupler becomes available.
929      - See verification/global_with_exf/README for usage example.
930      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
931        flags and modified pkg/seaice accordingly.
932    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
933        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
934        non-local transport term.
935    
936    checkpoint51e_post
937    o pkg/mom_vecinv:
938      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
939      - add time-ave diagnostic of vorticity advection.
940    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
941    o atmospheric geopotential: - include water vapor effect;
942                                - use p^kappa in p* scaling.
943    o land pkg: read initial state from files.
944    o AIM : add stratospheric drag in the upper level
945    
946    checkpoint51d_post
947    o change function ILNBLNK (=> last non-blank char.) to return zero
948      (instead of the string length) when the string. char is empty
949    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
950    o modif's to restore TAMC compatibility
951      - avoid "_d" constructs in PARAMETER declarations
952      - avoid interrupting lines by comment lines
953    o Use cluster local disks for purely local I/O
954      vs. globally visible disks needed for ctrl stuff
955      (merged from ecco-branch)
956      - new active_file_loc... and mdsio_..._loc routines
957      - affected packages: autodiff, ctrl, grdchk, mdsio
958    
959    checkpoint51c_post
960    o introducing integer flag debugLevel
961      - debLevZero: suppress all output
962      - debLevA: standard
963      - debLevB: equivalent to current debugMode=.TRUE.
964    o introducing pathname variable mdsioLocalDir for mdsio
965      that can be specified at runtime
966      (relevant for cluster I/O to local disk)
967    `
968    >>>checkpoint51b_post
969    adjoint of ptracers
970    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
971    o extended state in checkpoint_lev?, etc.
972    o alternative ctrl/cost with tr1 or ptracer
973    o new comlev1_bibj_ptracers
974    o new ptracers.flow
975    o made ptracers_forcing same as external_forcing_s
976    o added verification for adjoint with ptracers
977      - adm. grdchk fail so far
978      - tlm. grdchk OK
979      - checked tapelev/comlev recomputations: OK
980    <<<checkpoint51b_pre
981    
982    checkpoint51a_post
983    o added code for biogeochemistry package
984      - new pkgs: dic, gchem
985      - new subroutine in ptracers
986    o modify code for biogeo packages
987      - in model/src and pkg/ptracers
988    
989    checkpoint51
990    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
991      - autodiff, ctrl, exf, grdchk, seaice
992      kept separate packages
993      - cost, ecco, obcs
994    o updating verification/internal_wave, verification/lab_sea
995      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
996    
997    checkpoint50i_post
998    o Preparing next differentiable checkpoint and sync
999      of MAIN vs. ecco-branch
1000      - 1st step: this one is differentiable
1001      - 2nd step: next(! not this) checkpoint will have updated packages
1002                  from ecco-branch)
1003    
1004    checkpoint50h_post
1005    o new package "land": provide surface BC for AIM.
1006    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1007    o AIM: use true log-P extrapolation for near surface temp (= as in
1008        F.Molteni paper) ; update aim.5l_cs output.
1009    o New variable in PARM03 for more flexible pickups
1010    o somewhat cleaned package initialisation sequence for
1011      ctrl/ cost/ ecco/ in packages_... routines
1012    
1013    checkpoint50g_post
1014    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1015      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1016      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1017        made the default because of faster convergence than ADI
1018    
1019    checkpoint50f_post
1020    o exf totally restructured
1021      - replaced all exf_set_ routines by one generic exf_set_gen.F
1022        and made sure it's still differentiable
1023      - split exf_getffields.F into new exf_bulkformulae.F
1024      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1025      - updated adjoint/makefile and relevant verif. accordingly
1026    
1027    checkpoint50f_pre
1028     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1029          + change Evap over land. (update aim.5l_cs output)
1030     o added missing .cvsignores and made uniform across expts
1031     o changed configuration of tidal_basin_2d expt
1032     o added pkg/debug functions for tracing code in fatal crashes
1033     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1034     o new fn in pkg/monitor to stop model if solution grows too big
1035     o removed lots of single quotes from comments
1036    
1037    checkpoint50e_post
1038    o make KPP work with PTRACERS
1039     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1040       nearly a copy of kpp_transport_s
1041     - there is no analogue to SurfaceTendencyS, so I have to use
1042       gPtr(of the surface layer) instead
1043    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1044    checkpoint50e_pre
1045    
1046    checkpoint50d_post
1047    o change kpp output from multiple-record state files to single-record state
1048      files analogous to write_state.F
1049    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1050      analogous to the cg2d-related output.
1051    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1052      so that writing to internal file fn (with length 512) fails.
1053    checkpoint50d_pre
1054    
1055    checkpoint50c_post
1056    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1057    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1058    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1059    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1060    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1061    
1062    checkpoint50c_pre
1063    Merging from release1_p13:
1064    o bug fix for pkg/seaice dynamic solver
1065    o Added SEAICE_initialHEFF to pkg/seaice
1066    
1067    checkpoint50b_post
1068    o store u*,v* in gU,V instead of in guNm1,gvNm1
1069    o in order to put the momForcing out of the Adams-Bashforth:
1070      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1071      to timestep.F
1072    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1073    o re-generate output for highly sensitive test-exp:
1074       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1075    
1076    checkpoint50b_pre
1077    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1078    o corrected CPP option mismatch in exf_Bulk... functions for case
1079      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1080    
1081    checkpoint50a_post
1082    o Bug fix for merging between c50 and KPP.
1083      ikey was passed from thermodynamics to kpp_calc via
1084      common block rather than being recomputed in kpp_calc,
1085      in contradiction with new key itdkey.
1086      New key ikppkey created, and tamc.h headers updated.
1087    
1088    checkpoint50
1089    - 2nd step of merge with ecco-branch:
1090      merge changes in ecco-branch back into main trunk
1091    - bug fix in find_alpha
1092    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1093    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1094    - merged some sliced AD support routines
1095    
1096    checkpoint49
1097    merged from ecco-branch:
1098    o exf:
1099      - Enable initialisation of forcing fields to constant
1100        (runtime) values.
1101      - in exf_getffields.F
1102        Reduce i-/j-loop to interior domain, discarding overlaps.
1103        That also fixes wrong TAF-key computations for key_1, key_2
1104        with bulf formulae.
1105      - exf_init.F modify #ifdef for exf_init_evap
1106      - exf_getffieldrec.F, ctrl_getrec.F
1107        The following INT-usages are not safe:
1108          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1109          fldcount = int(fldsecs/fldperiod) + 1
1110        and were modified.
1111    o autodiff: checkpoint_lev...
1112      - updated storing for bulk formulae (some arrays were missing)
1113      - added state for seaice package
1114      - synchronized with main branch
1115    o DIVA:
1116      Modif.s in
1117      - the_main_loop.F
1118      - the_model_main.F
1119      and added cost_final_restore.F cost_final_store.F
1120      o With these changes, it is possible to fully separate
1121        the first forward run to compute the cost function (mdthe_main_loop)
1122        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1123        into separate model executions.
1124        This enables better tuning of DIVA to given queue sizes.
1125      o Loss of cost function value in consecutive DIVA runs is
1126        fixed by storing to 'costfinal' file.
1127      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1128        beginning/end of adjoint integration is accounted for.
1129      The current changes apply to TAF-1.4.26.
1130      TAF has one remaining bug, requiring one manual change
1131      (see MITgcm manual).
1132    o cal: synchronized between MAIN and ecco-branch
1133    
1134    checkpoint48i_post
1135    o Changes to restore differentiability of code w.r.t. previous tag
1136      (mostly adding new routines to make list and replacing
1137      pressure by totPhiHyd).
1138    o Updated and merged grdchk package
1139      - has both ADM and TLM checks
1140      - works for single- and multi-proc.
1141      - output cleaned
1142      - worked successfully for parallel DIVA
1143    o genmake:
1144      - Adding -platform=SP4
1145      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1146    o Modif. for DIVA:
1147      ctrl_unpack should not be called in intermediate DIVA interval.
1148      (similar thing would apply for active files such as
1149      tbar, sbar, psbar, which should not be reinitialised;
1150      only relevant for ecco-branch)
1151    
1152    checkpoint48h_post
1153    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1154    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1155    o Added SEAICE_initialHEFF to pkg/seaice
1156    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1157    
1158    checkpoint48g_post
1159    --- EOS:
1160    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1161      store total Potential in totPhyHyd for diagnostics & EOS.
1162    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1163    --- Pressure/geopotential gradient:
1164    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1165    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1166      ( changes results of global_ocean_pressure )
1167    o NLFS + z-coord.: add eta*Rho' contribution.
1168    o accurate phiHyd when using interface-W at the middle between 2 centers
1169     ( changes results of ideal_2D_oce )
1170    o includes r* 2nd term in potential gradient.
1171    
1172    checkpoint48f_post
1173    Merging from release1_p12:
1174    o Modifications for using pkg/exf with pkg/seaice
1175      - improved description of the various forcing configurations
1176      - added basic radiation bulk formulae to pkg/exf
1177      - units/sign fix for evap computation in exf_getffields.F
1178      - updated verification/global_with_exf/results/output.txt
1179    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1180      (SBO) core products, including oceanic mass, center-of-mass,
1181      angular, and bottom pressure (see pkg/sbo/README.sbo).
1182    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1183      to avoid negative values in shallow regions.
1184      - updated verification/natl_box/results/output.txt
1185      - updated verification/lab_sea/results/output.txt
1186    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1187    o Added useSingleCpuIO option (see PARAMS.h).
1188    o Updated useSingleCpuIO option in mdsio_writefield.F to
1189      work with multi-field files, e.g., for single-file pickup.
1190    o pkg/seaice:
1191      - bug fix in growth.F: QNET for no shortwave case
1192      - added HeffFile for specifying initial sea-ice thickness
1193      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1194    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1195      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1196    o pkg/seaice:
1197      - adjoint-friendly modifications
1198      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1199    
1200    checkpoint48e_post
1201    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1202    o dynamics: change definition of computational domain & adapt mom_fluxform
1203      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1204    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1205        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1206        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1207        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1208        inverted_barometer solid-body.cs-32x32x1
1209      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1210    
1211    checkpoint48d_post
1212    o in preparation for r*:
1213     a) use pre-computed gradient of hydrostatic potential:
1214        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1215     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1216        => affects results of glob_oce_pressure (different truncation error)  
1217      update output.txt of ideal_2D_oce & global_ocean_pressure
1218    
1219    checkpoint48d_pre
1220    o in preparation for r*:
1221      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1222      pass the 2 comp. of the grad. as arguments to momentum S/R.
1223      but for the moment, only used if it does not change the results.
1224    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1225    
1226    checkpoint48c_post
1227    Modifications in treatment of initial flux forcing controls
1228    to avoid extra storing of flux fields.
1229    
1230    checkpoint48c_pre
1231    o Added tidal_basin_2d experiment (currently 1D!)
1232    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1233    
1234    checkpoint48b_post
1235    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1236     (modification to pressure gradient not yet implemented)
1237    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1238      (for U & V) that are used for vertical advection of momentum.
1239    
1240    checkpoint48a_post
1241    o In preparation for r*, use temp. array to compute vertical transport
1242       in flux-form momentum pkg. => change results of few test-exp.
1243      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1244                        lab_sea, natl_box & plume_on_slope
1245    
1246    checkpoint48
1247    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1248    
1249    checkpoint47j_post
1250    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1251    o moved adexch from forward_step to addummy_in_stepping
1252    o added exch in ctrl_map_...
1253    o aveFreq.=0. at end of cost_final to avoid overwrite in
1254      reverse checkpointing loop
1255    o Yet more changes in gmredi:
1256      * adgmredi_calc_tensor
1257        avoiding all recomputation of gmredi_slope_limit
1258      * adgmredi_x/y/rtransport
1259        added flag for excessive storing to avoid recomp. of
1260        u/v/rtans, dTdx/y/z
1261        -> this is not really necessary and very memory-consuming
1262      * adgmredi_slope_psi:
1263        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1264      * gmredi_slope_limit
1265        re-activated full calculation of taperfct for case 'ac02'
1266    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1267    
1268    checkpoint47i_post
1269    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1270    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1271      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1272    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1273    o gmredi: fix few bugs.
1274    
1275    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1276    This will be a good checkpoint to plug into the ecco-branch.
1277    o few modif.'s to get latest version adjointed
1278      (mainly kick out code in ini_linear_phisurf)
1279    o modif's to run adjoint with exactConserv
1280    o case GM_BOLUS_ADVEC should be cleaned
1281      S/R gmredi_slope_psi should be cleaned
1282    o verification/carbon now has exactConserv=.TRUE.
1283    
1284    checkpoint47g_post
1285    o time-average AIM output: becomes independent from statvars time-average
1286      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1287    o After TAF bug fix:
1288      Tested adjoint of gmredi package.
1289      Tests were done with checkpoint47 rather than with latest
1290      checkpoint47f_post since the latter is broken for the adjoint
1291      verification/carbon/ contains both ADM and TLM gradient checks.
1292    Here they are, before they get changed/lost/stolen.
1293    Mostly modif.'s to fix numerical sensitivities.
1294    Gradient checks OK for
1295    - GM_taper_scheme:
1296      * clipping
1297      * ac02
1298      * linear
1299      * glw91
1300      * dm95
1301      * ldd97
1302    - GMREDI_OPTIONS:
1303      * GM_VISBECK_VARIABLE_K
1304      * GM_NON_UNITY_DIAGONAL
1305      * GM_EXTRA_DIAGONAL
1306      * GM_BOLUS_ADVEC
1307    in conjunction with data.gmredi parameters to be checked in
1308    in a few minutes under verification/carbon/code/
1309    
1310    checkpoint47f_post
1311    Merging from release1_p10:
1312    o modifications for using pkg/exf with pkg/seaice
1313      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1314        and SEAICE_EXTERNAL_FLUXES
1315      - pkg/exf CPP options EXF_READ_EVAP and
1316        EXF_NO_BULK_COMPUTATIONS
1317      - usage examples are Experiments 8 and 9 in
1318        verification/lab_sea/README
1319      - verification/lab_sea default experiment now uses
1320        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1321    
1322    checkpoint47e_post
1323    o created a tag prior to creating a branch
1324    
1325    checkpoint47d_post
1326    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1327      at the bottom boundary had an erroneous half slip boundary condition
1328    o added bottom drag and no slip boundary condition capabilities to
1329      oceanic pressure coordinates code
1330    o added new verification experiment global_ocean_pressure, this experiment is
1331      also described in the tutorial section of the manual
1332    checkpoint47d_pre
1333    
1334    checkpoint47c_post
1335    o Added a verification experiment for a global cubed-sphere ocean run
1336      -  verification/global_ocean.cubed32x32x30
1337      -  uses pkg/therm_seaice and pkg/bulk_forcing
1338    
1339    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1340    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1341      when using P-coordinate; only implemented for atmospheric config.
1342    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1343      NOTES: requires option NONLIN_FRSURF to be "#define".
1344    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1345    
1346    checkpoint47b_post
1347    Merging from release1_p9:
1348    o pkg/seaice
1349      - removed GOTO's and added taf directives
1350      - double precision constants to reduce the g77 (Linux)
1351        to F77 (SGI) differences reported in release1_p8
1352    o tools/genmake
1353      - added SGI options
1354    o verification/testscript
1355      - updated to that of checkpoint47a_post
1356    o verification/global_ocean.90x40x15/input/eedata
1357      - modified for SGI f77 compatibility
1358    o verification/lab_sea
1359      - added description of sea-ice model
1360      - added missing matlab routines
1361      - added test of thermodynamics parallelization
1362    
1363    checkpoint47a_post
1364    o new pkg: aim_v23
1365     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1366       for now, keep the same surface forcing as before.
1367     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1368     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1369     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1370    o add diagnostic of surface correction term in monitor output
1371    
1372    o bulk_force and therm_seaice
1373    - Two packages:  bulk_force (Bulk forcing)
1374      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1375    - Earlier integration from Stephaine Dutkiewicz
1376      and Patrick Heimbach.
1377    - Two ifdef statements for compile time,
1378       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1379    
1380    checkpoint47
1381    differentiable version of checkpoint46n_post
1382    o bug fix in quasihydrostaticterms
1383    o * "clean" adjoint code (in terms of extensive recomputations)
1384        can now be obtained for all GMREDI options (i.e. for
1385        - GM_VISBECK_VARIABLE_K
1386        - GM_NON_UNITY_DIAGONAL
1387        - GM_EXTRA_DIAGONAL
1388        - GM_BOLUS_ADVEC )
1389      * However, wrong gradient check problem remains unsolved.
1390      * New CPP options have been introduced for different
1391        tapering schemes
1392    o external_fields_load now part of differentiation list
1393    o pressure needs multiple storing;
1394      would be nice to have store_pressure at beginning or
1395      end of forward_step, e.g. by having phiHyd global (5-dim.)
1396      (NB: pressure is needed for certain cases in find_rho,
1397      which is also invoked through convective_adjustment).
1398    o recomputations in find_rho for cases
1399     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1400    o #define ATMOSPHERIC_LOADING should be differentiable
1401    o ini_forcing shifted to begining of initialise_varia
1402    o Incorporating QNVS line search routines into MITgcm
1403      (this is separate code, and therefore not under pkg)
1404      lsopt/, optim/
1405    o Updated verification/carbon/
1406      - #define GM_VISBECK_VARIABLE_K
1407      - GM_taper_scheme    = 'ldd97'    
1408    
1409    checkpoint46n_post
1410    Merging from release1_p8:
1411    o verification/natl_box:
1412      updating new external_fields_load routine
1413    o New package: pkg/seaice
1414      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1415      The sea-ice code is based on Hibler (1979-1980).
1416      Two sea-ice dynamic solvers, ADI and LSR, are included.
1417      In addition to computing prognostic sea-ice variables and diagnosing
1418      the forcing/external data fields that drive the ocean model,
1419      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1420      The implied surface heat flux is then stored in variable
1421      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1422      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1423      non-local transport term.  Because this call precedes model
1424      thermodynamics, temperature under sea-ice may not be "exactly" at
1425      the freezing point by the time theta is dumped or time-averaged.
1426      N.B.: fairly large differences in accuracy occur across
1427            different platforms/compilers; comparison between
1428            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1429            generated output gives:
1430       T           S           U           V
1431      C D M    c        m  s        m  s        m  s        m  s
1432      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1433      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1434      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1435    
1436      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1437    o GAD:
1438      - generated new common blocks to account for call of
1439        same gad routines with differing traceridentities
1440        (needed to modify tracerIdentity indices in GAD.h)
1441      - generated separate common blocks for case useCubedSphereExchange
1442        (Department of Futurology)
1443      - parameter lists to gmredi_?transport: added tracerIdentity
1444      - added new key indices to tamc.h
1445    o external_fields_load:
1446      - added this routine to TAF list
1447      - needed to make some common blocks global and additional storing
1448        along the same lines as exf package (checkpoint_lev?_directives.h)
1449    o exf:
1450      updated external forcing package
1451      - bug fixes carried over from ecco-branch
1452        (missing OBCS_OPTIONS.h in two routines)
1453      - enable easy to use "no forcing".
1454      - added exf I/O for atmospheric loading
1455      - added exf I/O for runoff data
1456      - transfered scaling between exf <-> MITgcm to exf namelist
1457    o Adding new verification experiment global_with_exf.
1458      This verification experiment is almost identical to the
1459      global_ocean.90x40x15 experiment, except that it uses
1460      the exf (and cal) package instead of the
1461      external_fields_load routine (cf README file).
1462    
1463    checkpoint46m_post
1464    o modified testscript to return -- when there are no lines of "%MON" output
1465    o added new flag "quasiHydrostatic" for QH mode
1466      and new routine quasihydrostaticterms()
1467    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1468      New routine: mom_u_coriolis_nh()
1469    o fixed sign of non-hydrostatic metric terms in u and v equations.
1470      Depend on correct sign of gravitySign.
1471    o added work.pc* to .cvsignore in aim directories using ifc
1472    o introduced flag for controllin non-hydrostatic metric terms
1473    o removed gravitySign from PARM04
1474    o switched to g77/ifc from pgf77 in aim experiments
1475    
1476    checkpoint46l_post
1477    o made convective adjustment work with pressure coordinates:
1478     - changed the direction of k-loop in convective_adjustment.F for the
1479       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1480     - adjusted the reference pressure k-index in convective_adjustment.F
1481     - adjusted the convection condition in convect.F (in analogy to
1482       calc_ivdc.F)
1483     - convective_adjustment no longer computes anything on the halos
1484     - removed the warnings about negative salinity from find_rho.F and
1485       find_alpha.F; instead the new routine look_for_neg_salinity, called
1486       at the beginning of find_rho, find_alpha, and find_beta, does a
1487       check of the entire slice, if CPP-option
1488       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1489    checkpoint46l_pre
1490    
1491    checkpoint46k_post
1492    o fixed the verification/global_ocean.90x40x15 experiment:
1493     - new bathymetry (the world according to A., JMC, and M.)
1494     - new initial fields and forcing fields (*.bin files)
1495     - new POLY3.COEFFS (for the next release one should switch to a full
1496       equation of state: JMD95P or MDJWF)
1497     - fixed several errors and redundancies in the data file
1498     - experiment uses looped cells
1499     - added matlab directory with diagnostic scripts for plotting of output
1500    
1501    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1502     - read AIM physics parameters from a file (data.aimphys)
1503     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1504    
1505    checkpoint46j_post
1506    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1507    o move wVel computation at the end of the time step, in S/R integr_continuity
1508    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1509    o update timeave pkg for wVel diagnostic.
1510    checkpoint46j_pre
1511    
1512    checkpoint46i_post
1513    o Clean up AIM package (and keep the results unchanged):
1514      include CPP_OPTION and use IMPLICT NONE in all routines ;
1515      declare all the variables _RL ; use _d 0 for all numerical constants.
1516      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1517    
1518    checkpoint46h_post
1519    o cleaned up the use of rhoNil and rhoConst.
1520      - rhoNil should only appear in the LINEAR equation of state, everywhere
1521        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1522        and the dynamical equations are all divided by rhoConst
1523    o introduced new parameter rhoConstFresh, a reference density of fresh
1524      water, to remove the fresh water flux's dependence on rhoNil. The default
1525      value is 999.8 kg/m^3
1526    o cleanup up external_forcing.F and external_forcing_surf.F
1527      - can now be used by both OCEANIC and OCEANICP
1528    checkpoint46h_pre
1529    
1530     Added code to convert surface volume flux (fresh water) into
1531     a mass flux when using P coordinates in the ocean (OCEANICP).
1532     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1533    
1534    checkpoint46g_post
1535    o Include a new diagnostic variable phiHydLow for the ocean model
1536      - in z-coordinates, it is the bottom pressure anomaly
1537      - in p-coordinates, it is the sea surface elevation
1538      - in both cases, these variable have global drift, reflecting the mass
1539        drift in z-coordinates and the volume drift in p-coordinates
1540      - included time averaging for phiHydLow, be aware of the drift!
1541    o depth-dependent computation of Bo_surf for pressure coordinates
1542      in the ocean (buoyancyRelation='OCEANICP')
1543      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1544        Theta, Salinity, and Pressure in the parameter list. This routine is
1545        presently contained in find_rho.F. This routine does not give the
1546        correct density for 'POLY3', which would be a z-dependent reference
1547        density.
1548    o cleaned up find_rho
1549      - removed obsolete 'eqn' from the parameter list.
1550    o added two new verification experiments: gop and goz
1551      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1552    checkpoint46g_pre
1553    
1554    checkpoint46f_post
1555    o Enable tangent linear (forward mode) gradient checks:
1556      - extended active file handling to g_... files
1557      - added TANGENT_SIMULATION to theSimulationMode
1558      - extended grdchk package accordingly
1559    o added tangent linear setup in verification/carbon/code_ftl
1560    o added adjoint setup in verification/front_relax/code_ad
1561    
1562    checkpoint46e_post
1563    o Added new equation of state -> MDJWF
1564      - EOS of McDougall et al., 2002, JAOT, submitted
1565      - caveat: the equation of state is only valid for a smaller (more
1566        realistic?) range of values than JMD95P/Z and UNESCO
1567      - added masks to the calculation of pressure in store_pressure
1568      - added more check values for density in check_eos (ini_eos.F), some of
1569        the old check values are out of the range of the MDJWF-eos, so don't
1570        expect perfect matches for those
1571    checkpoint46e_pre
1572    
1573    checkpoint46d_post
1574    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1575      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1576      case of pressure coordinates. eosType='JMD95Z' in
1577      combination with buoyancyRelation='OCEANICP' now causes an error.
1578    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1579      in find_alpha/beta.
1580    checkpoint46d_pre
1581    
1582    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1583      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1584    
1585    checkpoint46c_post
1586    o Changes necessary for ocean in p-coordinates
1587     -  Added new buoyancy relation = 'OCEANICP'
1588     -  Added new parameters = gravitySign (this used to be contained inside
1589        the factor dRdZ which I added when we first switched to R coordinates).
1590     X GM/Redi is not compatible (yet)
1591     X bottom drag and no-slip need to be debugged.
1592    checkpoint46c_pre
1593    
1594    checkpoint46b_post
1595    o Added new equation of state -> JMD95Z and JMD95P
1596      - EOS of Jackett and McDougall, 1995, JAOT
1597      - moved all EOS parameters into EOS.h
1598      - new routines ini_eos.F, store_pressure.F
1599    o Added UNESCO EOS, but not recommended because it requires
1600      in-situ temperature (see JMD95)
1601    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1602      unesco.f to be used with POLY3
1603    checkpoint46b_pre
1604    
1605    checkpoint46a_post
1606    o Added (atmospheric) pressure loading
1607      - new field in FFIELDS.h, etc...
1608      - new cpp flag ATMOSPHERIC_LOADING
1609    o Changed hFacC to _hFacC in calc_phi_hyd.F
1610    o Added SHORTWAVE_HEATING to some files for consistency
1611    checkpoint46a_pre
1612    
1613    checkpoint46
1614    further merges from release1_p5
1615    o new ctrl package
1616      - adopted from ECCO environment to enable optimization
1617      - added Eliassen Palm fluxes to controls
1618    o added Eliassen Palm flux controls to gradient check package
1619    o cost package
1620      - Compatible with new ctrl package
1621      - added Eliassen Palm cost hooks
1622      - modif's of existing cost functions
1623    o Adjoint-related bug fixes in kpp:
1624      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1625      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1626    o autodiff package
1627      - flow directives:
1628        + new for S/R do_the_model_io
1629        + enhanced for S/R checkpoint
1630        + new gmredi.flow
1631      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1632        disable adcommon.h/g_common.h by default.
1633      - fixed problem for adjoint of global_max
1634    o modified verification/carbon/
1635    o New setup for adjoint of global_ocean
1636    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1637    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1638    o incorporated hooks for sponge layer code (external_forcing.F)
1639    
1640    checkpoint45d_post
1641    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1642    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1643      (affects plume_on_slope "cg2d" output)
1644    o add new parameter deltaTfreesurf for free-surface time stepping
1645    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1646    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1647    o change phiMin in exp1 (to agree with documentation)
1648    o add new flags:
1649     - T,S forcing inside/outside Adams-Bashforth
1650     - turn off temp,salt advection and/or forcing
1651     - for each tracer, define internal flag for multiDimAdvection & A-B
1652    o monitor: change definition of KE to check conservation of Energy
1653    
1654    checkpoint45c_post
1655    o Removed f90 comments ("!")
1656    o Modified initialisations to enable exf package for MITgcm
1657      (without invoking ECCO_PACKAGE).
1658    o modifications to gradient check package (Martin Losch)
1659      - enable centered differences
1660      - modified format of standard output
1661    
1662    checkpoint45b_post
1663    o cleaned exchange calls in cg2d
1664    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1665    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1666      to configure barotropic setup (Martin Losch)
1667    o moved some initialisations within bi,bj loop in dynamics
1668      (TAF flow dependency)
1669    o in initialise_varia, moved call packages_init_variables
1670      before convective_adjustment_init
1671      (corresponding adjustment of TAF tape initialisation).
1672    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1673    
1674    checkpoint45a_post
1675    o compute Rho over the whole domain (extend iMin,jMin indices)
1676    o specific exchange for X-slice domain (case Ny=1)
1677    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1678    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1679    
1680    checkpoint44h_post = checkpoint45
1681    o Fix to restore differentiability:
1682      place at which packages_init_variables is called in
1683      initialise_varia is crucial for reverse control flow.
1684    o modifications in GMRedi to enable stable adjoint
1685      (corresponding modif's in thermodynamics, dynamics)
1686    o added missing hook for sponge layer code in external_forcing
1687    o modified test cost functions
1688    o storing in gad_advection (plus removal of write(0,*)!
1689    o missing headers TR1.h added in convective_adjustment routines
1690    o errorMessageUnit set non-equal zero in eeboot
1691      (conflict on some platforms, e.g. IBM SP3)
1692    o modified carbon verif.
1693    
1694    checkpoint44h_pre
1695    o vertical grid option: allow to put the Interface at the middle between
1696      2 cell-centers ; replace delZ in pkg/kpp by drF.
1697    o GM Advective form: Tracers are advected using the residual transport (=
1698      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1699    
1700    checkpoint44g_post
1701    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1702      results) ; ifdef missing in thermodynamics.F
1703    
1704    checkpoint44f_pre,checkpoint44f_post
1705    o added PTRACERS package
1706      This allows an arbitrary number of passive tracers to be integrated
1707      forward simultaneously with the dynamicaly model.
1708      + Implemented so far:
1709        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1710        - I/O and checkpointing
1711        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1712      + Not implemented so far:
1713        - KPP
1714        - OBCS
1715      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1716        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1717        line in data.pkg.
1718      + This package is disabled by default since it increases storage.
1719    
1720    
1721    o testscript: added -cleanup option
1722    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1723                 b) enable to filter 2D fields.
1724    
1725    checkpoint44e_pre,post
1726    o re-wrote convective adjustment to use pre-calculated weights
1727      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1728      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1729      Original calls to convect() still in place.
1730    
1731    chkpt44d_pre,post
1732    o added missing EXCLUDE_MONITOR flags
1733    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1734      (incompatible typ in MIN/MAX expressions caused problems
1735      on IBM SP3)
1736    o in genmake added variable MAKEDEPEND
1737      plus resetting for case SunOS
1738    o added timer_stats.c routine for IBM SP3
1739    o removed variables in dynamics
1740    !!! I forgot to create tag chkpt44d_pre !!!
1741    !!! But chkpt44d_pre = chkpt44c_post    !!!
1742    
1743    o real fresh water flux implemented with non-linear free-surface.
1744    
1745    chkpt44c_pre,post
1746    o few fix (mask in shap_s2, EmPmR in external_field_load,
1747      USE_NATURAL_BCS in solve_for_P);
1748    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1749    
1750    checkpoint44b_pre/_post
1751    o merge of relevant stuff from the ecco-branch:
1752      - genmake: removed $S64 overwrite for case SunOS
1753      - pkg/exf: update and corrections for field swapping and obcs
1754      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1755                  harmonized between ECCO and MITgcm
1756      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1757                      updated checkpointing_lev... lists for obcs
1758      - model/src: minor changes in forward_step, plot_field
1759                   added directive for divided adjoint in the_main_loop
1760      - pkg/mdsio: added mdsio_gl_slice
1761    
1762    o check parameters & config (chkpt44a_pre,post)
1763    o OBC and NonLin_FrSurf.
1764    
1765    checkpoint44
1766    o fix bug in mom_vi_del2uv
1767    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1768    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1769    o update AIM experiments (NCEP input files)
1770    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1771    o added some stuff for AD
1772    
1773    checkpoint43
1774    o added two new advection tests
1775    o added global 4x4 degree ocean test
1776    o added test of H&S94 with free surface on cube
1777    o some final mods for gradient check, adjoint,...
1778    
1779    checkpoint42
1780      Fixed AD-related problems:
1781    o Store directives up-to-date with re-arranged Adams-Bashforth
1782      (mainly thermodynamics.F)
1783    o New store directives for multi-dim. advection schemes
1784      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1785      * new common block and key passkey
1786      (mainly gad_advection.F)
1787    o Modified store directives for split of dynamics/thermodynamics
1788      for the case ALLOW_KPP
1789    o Cleaned argument list for timestep_tracer.F
1790    
1791    checkpoint41
1792    o re-formatted/added comments in prologues of key subroutines
1793      to work with protex
1794    
1795    checkpoint40
1796    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1797    o added FLT (floats) package from Arne along with demo. experiment
1798    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1799      implementation of forward-in-time forcing terms
1800    o more mods for non-linear free-surface including new variable
1801    o modified multi-dim method to work on cube
1802    o bug fix in KPP (from DM)
1803    
1804    checkpoint40pre9
1805    o added DST advection schemes
1806    o fix MPI bug on SGI's
1807    o modifications for non-linear free-surface
1808    o fixed conditionals for fixed flow/passive tracer only mode
1809    o added tension/strain form of stress tensor
1810    o changes to commenting of arguments for TAF/TAMC
1811    o added/updated many matlab scripts
1812    o added multi-dimensional advection method for tracers
1813      
1814    checkpoint40pre8
1815    o new package rw/
1816      Added method for dumping intermediate local arrays:
1817      mdsio_writetile - same as mdsio_writefield except works from inside
1818                        bi,bj loop
1819      mdsio_writelocal - same as mdsio_writetile except works for local
1820                         arrays
1821      write_local_r? - higher-level wrapper for mdsio_writelocal
1822      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1823      Example given at end of mom_vecinv.F that dumps some local arrays.
1824    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1825      control flux-form versus vector invariant code.
1826      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1827      or genmake -DISABLE ...
1828    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1829      (additional storing is now needed for case vecinv;
1830      currently nothing implemented to switch this storing off
1831      in case fluxform is used since no CPP flag available).
1832    
1833    checkpoint40pre7
1834    o bug fix in dynamics.F
1835      calc_viscosity called before k=1,Nr loop.
1836    o added some #ifdef's ALLOW_PASSIVE_TRACER
1837    o cleaned initialisations in ctrl_map_ini
1838      related to TAF
1839    
1840    checkpoint40pre6
1841    o split dynamics into thermodynamics & dynamics
1842    o corresponding split of calc_diffusivity into
1843      calc_diffusivity, calc_viscosity
1844      (kpp_calc_diff, kpp_calc_visc).
1845    o Added diffkr, kapgm to control variables
1846    o bug fix in gmredi_slope_limit for ldd97
1847    
1848    checkpoint40pre5
1849    o proper initialization of Adams-Bashforth time stepping
1850      + uses forward step for very first step of model (iter=0)
1851    o re-generated *all* output since almost all output is modified by this
1852      change (sorry but we've been putting this one off for about 2 years)
1853      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1854        *not* regenerated since they are already out of date and I don't
1855        want to create the impression that they are suddenly working.
1856    o removed KAP stuff for DEC's
1857    o modified/added many .cvsignore files in */code and */input
1858    o added new expt "solid-body.cs-32x32x1"
1859      + this uses an alternative form of ini_curvilinear_grid.F which
1860        is not necessarily any better than the current one...
1861    
1862    checkpoint40pre4
1863    o added re-initialisations of utrans,vtrans,rtrans in
1864      calc_common_factors which are crucial for TAF.
1865    o extended iMin,jMin range for calc_common_factors,
1866      calc_diffusivity
1867    o added option ALLOW_PASSIVE_TRACER
1868    o a few minor updates and fixes
1869    
1870    checkpoint40pre3
1871    o created calc_gtr1.F for gad package
1872    o split the_main_loop and re-introduced forward_step
1873    o some recomputations of nIter0 for TAMC
1874    
1875    checkpoint40pre2
1876    o Updated to latest branch of AJA, JMC
1877    o Added gradient check package
1878    o Added routines for passive tracer handling
1879    o Added carbon sequestration sensitivity experiment
1880    
1881    checkpoint39
1882     o Modifications and fixes to support TAMC
1883       (mainly missing or wrong directives)
1884     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1885       in addummy_in_stepping
1886     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1887     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1888     o Included following packages:
1889       cal: calendar
1890       exf: external forcing
1891       ecco: essential routines to control use of cal, exf
1892             (NB: this is not the full ECCO environment)
1893     o disabled some packages by default in genmake
1894    
1895    checkpoint38
1896     o see notes_c37_adj.txt
1897     o corrected wrong layer index in external_forcing_t
1898     o replaced the_main_loop/forward_step by the_main_loop
1899     o removed forceoutput from write_state
1900       (replaced criteria for initial/final state)
1901     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1902    
1903    checkpoint37
1904     o mdsio.F routine split and packaged in pkg/mdsio
1905       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1906        used unless genmake -disable=mdsio)
1907     o allow a more precise surface-geopotential gradient for the atmosphere
1908       taking into account the change in space of Alpha (=1/rho) at the surface.
1909     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1910       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1911     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1912       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1913       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1914     o Time-Average diagnostics defined as a pseudo package "timeave".
1915     o pickup files : old pickup (before c35) did not work with new code (c35
1916       and after) unless activating 2 commented lines in initialise-varia.
1917     o Non-Hydrostatic pickup file Pb fixed.
1918     o bug with Rigid-lid version (since c35) fixed.  
1919    
1920    checkpoint36
1921     o implement Crank-Nickelson barotropic time-stepping
1922     o recover Time-Average diagnostics
1923     o fix Pb in checkpoint (PR#19)
1924     o AIM become a standard package ; clean unused CPP_kees
1925    
1926    checkpoint35
1927     o subtantial rewrite of dynamics.f
1928     o allows staggered time-stepping
1929     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1930     o added bottom drag (linear + quadratic)
1931    
1932    checkpoint34
1933     o Modified exchange routines for correct reverse simulation.
1934     o Added verification output to comply with bug fix in impldiff.F
1935       as of c33 (exp2, natl_box).
1936     o Corrected store directives in dynamics.F
1937     o Corrected array boundaries in impldiff.F
1938     o Corrected array dimensions in gmredi.
1939       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1940     o Added routine GLOBAL_SUM_INT to global_sum.F
1941     o Added mdsio_gl.F for ECCO purposes.
1942    
1943    checkpoint33
1944     o Fixed bug in lower BC in impldiff.F
1945     o Fixed confusion about units of forcing arrays in FFIELDS.h
1946       namely Fu,Fv,Qnet,Qsw,EmPmR:
1947       - Removed verification/natl_box/code/external_fields_scale.F
1948         (did not differ from that in model/src)
1949       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1950         (see FFIELDS.h for description)
1951       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1952         kpp_calc.F and kpp_transport_t.F
1953       - Removed model/src/external_fields_scale.F and calls to it
1954       - verification/natl_box uses flux data with "atmospheric" sign so
1955         a special version of external_fields_load.F is used to
1956         change the data as it's read in. This way, the arrays
1957         have the right units and signs at all times tha a user could
1958         possibly use them.
1959     o Corrected genmake to delete a temporary file during configuration
1960    
1961    checkpoint32
1962     o Scaling of forcing fields moved from external_forcing.F to
1963       external_fields_scale.F, called directly after loading fields.
1964     o Surface relaxation terms added to surface tendency fields in
1965       extra subroutine.
1966     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1967       fields.
1968     o Changes in GMRedi to comply with packaging structure.
1969     o Modifications and bug fixes in KPP package.
1970     o Verification experiment for KPP added (verification/nat_box/)
1971    
1972    checkpoint31
1973     o Packages interface brought in line with defined standard
1974       -> new routines packages_...F
1975       -> changes in initialise_fixed.F, initialise_varia.F
1976       -> enables initialisation interface for ECCO package
1977     o Rescaling of external forcing fields immediately after read
1978       (removed from external_forcing.F)
1979       -> new: surface_fields_scale.F
1980       -> affects ini_foorcing.F, external_fields_load.F
1981     o Computation of surface tendencies before tendency updates.
1982       -> new: external_forcing_surf.F
1983     o Change of variable names useGMRedi, useKPP, useECCO
1984     o Further changes in dynamics.F, impldiff.F for TAMC
1985     o Tested for experiments 0, 2, 4.
1986       - not yet tested for GMRedi.
1987       - not yet tested for KPP.
1988    
1989    checkpoint30
1990     o Updates for OBCs
1991     o New experiment for test OBCs (internal_wave)
1992     o New output.txt in verification/exp4/results/
1993     o Updates for KPP: calculation of viscosity corrected, new variables
1994       kpp_dumpFreq and kpp_taveFreq
1995     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1996       and entry for T90 in genmake
1997    
1998    checkpoint29
1999     o packaged KPP and GM/Redi
2000    
2001    checkpoint28
2002     o Corrected initialization of hFacMin for difference vertical coordinates
2003     o Modified calculation of partial cell thickness to more robust algorithm
2004     o config_summary.F: replaced write_1D_... by write_0D_...
2005       read_write.F: added subroutines write_0D_...
2006     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
2007       included some initialisations required for TAMC.
2008     o routine calc_isoslopes: modified sqrt computation to make it
2009       differentiable for zero argument.
2010     o routines dynamics, impldiff:
2011       included store directives and tape key computations required for TAMC.
2012     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
2013    
2014    checkpoint27
2015     o fixed calc_isoslopes() to so that cancellation of terms in tensor
2016       formulation works properly with variable resolution.
2017     o restructured the calling tree between the_model_main() and dynamics()
2018     o split initialise() into initialise_fixed() and initialise_varia()
2019     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
2020       in new routine ini_psurf()
2021    
2022    checkpoint26
2023     o moved some #ifdef in optional routines to encompass everything
2024       except the argument declarations. This was using up some memory.
2025     o fixed macros like _ADT to work with both versions of Linux cpp
2026     o cleaned up some unused and uninitialized variables
2027       (helps when debugging with strict compile options)
2028     o split up CPP_EEOPTIONS.h into options and macros
2029       (macros are now in eesupp/inc/CPP_EEMACROS.h)
2030     o patch for 2 processor JAM mode
2031    
2032    checkpoint25
2033     o updates for OBCs and NH
2034     o dramatically reduced memory usage
2035     o added "JAM" routines for use on Artic network
2036     o parameterization of convection by implicit vertical diffusion
2037     o added a diagnostic of convective index
2038     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
2039       (this is was partly for OBCs and NH but also in anticipation of
2040        an explicit free-surface option)
2041     o initial state input files for U and V
2042    
2043    checkpoint24
2044     o Removed some spurious "REAL"s
2045     o Updated KPP to latest version from JPL
2046     o Added a COS(latitude) in horizontal viscosity
2047    
2048    checkpoint23
2049     o Added del^4 diffusion for salt and temperature
2050     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
2051    
2052    checkpoint22
2053     o Made many small changes: implicit none, format(i5), etc...
2054     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
2055    
2056    checkpoint21
2057     o Introduced new I/O package that supports direct-access records (mdsio.F)
2058     o Split-up mid-level I/O routines
2059     o Updated input data for experiments 0,1,2,4 and 5
2060     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
2061    
2062    checkpoint20
2063     o Tidied up open-boundaries some more
2064     o Added non-hydrostatic code
2065     o Fixed some input data
2066     o Modified MPI start-up to work in "coupled" context.
2067    
2068    checkpoint19
2069     o Tidied up directory structure for verification experiments.
2070     o Added new code for open boundaries.
2071     o Corrected advective terms near boundaries.
2072     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
2073     o Implemented free-slip/no-slip BCs and del^4 dissipation.
2074     o Split default parameters out of ini_parms.F into set_defaults.F.
2075    
2076    checkpoint18
2077     o Further changes for optional code generation with
2078       CPP - ugh!
2079    
2080    checkpoint17
2081     o Beginning to incorporating modularity
2082       for supporting atmos. and ocean configs.
2083     o Small changes for TAMC complinace
2084     o New ultra simple test case. Barotropic box
2085       configuration "exp0".
2086    
2087    checkpoint16
2088     o Minor changes to exchange routines to support
2089       accumulation in reverse mode. Adjoint of an
2090       assignment is an addition.
2091     o Changes to support compilation by TAMC (LR(1)
2092       syntax) and by g77 under Linux ( 72 character
2093       limit ).
2094    
2095    checkpoint15
2096     Rewrote exchange routines to allow
2097     o General tile <-> tile connectivity.
2098     o TAMC reverse mode flag ( is this really needed? )
2099     o Variable width overlap and exchange region widths.
2100     o Hooks for sharing data via DMA, Arctic, Memory Channel,
2101       shmput/shmget, VIA, SYSV shmem and every other cool
2102       communication method.
2103    
2104    checkpoint14
2105     Consistent isomorphism chages made. These allow dynamical core
2106     to support both pressure and meters as a vertical coordinate.
2107    
2108    checkpoint13
2109     Release which corrects global_max problem and a couple
2110     of KGM time-averaging diagnostic errors. Also contains
2111     a double-gyre experiment setup as well as the baseline
2112     4 degree global template. The double gyre template is
2113     organised to allow it to be applied automatically to
2114     the baseline configuration.
2115    
2116    branch-point-rdot
2117     A few tidy-ups have been made bt the real point of this
2118     check-point (excuse the pun) is to allow a branch to be
2119     made for the purposes of adding the rDot alterations.
2120     I don't want to commit the rDot to the main-trunk until
2121     we've actually tested it...
2122    
2123    checkpoint12
2124     Tidy up and added generic genmake script (formerly
2125     configure script).
2126     Released to testers.
2127    
2128    checkpoint11
2129     Re-arranged initialise() and introduced ini_vertical_grid()
2130     and ini_masks_etc().
2131    
2132    checkpoint10
2133     Introduced the configure script.
2134     Separated out the diags package.
2135     Added template for writing time-averages of tile/intermediate quantities.
2136     Updated SIZE.h in exp2 and made the data big-endian.
2137    
2138  checkpoint9  checkpoint9
2139   MPI fix. Filename changes (meta/data). salbin*y stuff.   MPI fix. Filename changes (meta/data). salbin*y stuff.
2140   General tidy-up.   General tidy-up.

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