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revision 1.70 by jmc, Sat Apr 6 01:36:25 2002 UTC revision 1.399 by mlosch, Fri Dec 3 01:09:51 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint56c_post
7    o OBCS as control variables
8      - update ctrl_ad_diff.list, obcs_ad_diff.list
9      - remove balance of obcs controls from default
10      - fix index bug nobcs in ctrl_init
11      - fix dummy fields filen in ctrl_pack
12      - add dummy weights for obcs
13    o lsopt: comment out fort.94 output
14    o optim:
15      - remove unnecessary header files
16      - adjusted namelists
17      - add xerbla.F to Makefile
18    o exf:
19      - multiple modifications of exf_check_range
20      - unit change in exf_init_runoff from [m/year] to [m/s]
21    o mdsio:
22      - i/o-vector change debugLevel from debLevA to debLevB
23    
24    checkpoint56b_post
25    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
26      is called from DO_THE_MODEL_IO
27      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
28      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
29      - clean up PTRACERS_WRITE_TIMEAVE a little
30    o add another verification experiment that tests both the cfc-pkg and
31      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
32      reactive tendencies treated inline with regular timestepping
33    o testreport previously did a lousy job of comparing small numbers, so
34      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
35      implemented in the little c-progam tmp_cmpnum.c which is embedded in
36      testreport.
37    o ptracers_monitor: bug fix for MPI
38    
39    checkpoint56a_post
40    o GCHEM: finish reorganizating the package
41      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
42        (introduces another 3D-array for each passive tracer, but only if
43        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
44        gchemTendency is not needed because the timestep is done separately)
45      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
46      - GCHEM is now---more or less cleanly---separate from PTRACERS
47      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
48        so clear to me how that should be done in a general way.
49    o CFC: improve formatting of output in CFC_ATMOS
50    o PTRACERS:
51      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
52        that ALL experiments with ptracers enable can be checked. This makes
53        GCHEM_MONITOR obsolete.
54      - include a runtime parameter PTRACERS_monitorFreq that defaults to
55        monitorFreq
56      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
57    o add PTRACERS (PTR0[1-5]) to testreport output
58    o exf_check_range:
59      * default changed to .TRUE.
60      * will check values for niter0 if debLevA, every timestep if debLevB
61      * STOP in exf_check_range if 'out of range'
62      * range chosen generous to allow for potential extema
63      TBD: a version with stricter range
64           permitted range would be runtime parameters
65    o GMredi:
66      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
67      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
68      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
69    o GCHEM:
70      - move call to GCHEM_FORCING_SEP, so that it is now called before
71        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
72      - introduced a useGCHEM runtime flag and applied it everywhere.
73      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
74        this flag is now only visible within GCHEM-pkg routines.
75      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
76        be replaced by a 3D array that is computed before thermodynamics; for
77        this, the tracer ID iTracer had to be included into the parameter list
78        of ptracers_forcing
79      - set up forward_step to call gchem_forcing, that will replace
80        gchem_forcing_int in ptracers_forcing
81      - cleaning up
82    o small cleaning of exch2: remove files that are also in eesupp/src
83    
84    checkpoint56
85    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
86    o mnc: cleanup "full" files--fixes out-of-memory problem
87    o ECCO-GODAE
88      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
89      * fully merged and updated from SIO code
90        windstress sign change affects
91        - exf_inscal_[u/v]stress
92        - sign of xx_tau[u/v] adjustments
93        - signs in cost_scat
94      * ctrl_get_gen: avoid update of tau[u/v] for first few days
95      * natl_box_adjoint updated and compressed
96      * 2-level checkpoint switch added
97        (tested in EXP. 1 of natl_box_adjoint)
98      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
99    o SVD
100      * first complete, non-hacked version for SVD calculations
101      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
102        performed via direct access files admtlm_vector.it????
103        (via ctrl_[un]pack)
104      * optimcycle is used for ARPACK iteration counter
105        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
106      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
107        and add linear transforms where necessary
108      * controls are initial/final SST, SSS (can be extended; need to check
109        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
110    o mdsio: filename info to both stderr, stdout
111    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
112      from sign change
113    
114    checkpoint55j_post
115    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
116      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
117    o add consistent build directories and .cvsignore files to verification
118    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
119    o make all subroutines 30 or less characters in length for certain older
120      compilers to work (a thorough search only turns up two routines in
121      pkg/ptracers)
122    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
123      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
124    
125    checkpoint55i_post
126    o change arrays for total vertical diffusivity (2.D if explicit,
127      3.D if implicit) ; each ptracer uses its own background value.
128    o added mnc/NetCDF output capability to ocn_compon_interf
129      - added bits to verification/cpl_aim+ocn so that it can run on
130        ITRDA and other clusters without the mpirun "-wd" option
131    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
132      configuration
133    o give MNC the ability to create additional files rather than
134      exceeding a specified file size limit "MNC_MAX_FILESIZE"
135      - the default is just less than 2GB which is a practical limit
136        on many systems
137    o Compute the non-local term using either KPP vertical diffusivity (=default)
138       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
139    
140    checkpoint55h_post
141    o add verification test "vermix"
142    o remove all the *_ioinc flags and replace with the single global
143      outputTypesInclusive flag
144    o allow to set a vertical profile of vertical diffusivity for T & S
145    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
146    o useMNC moved from data.mnc to data.pkg
147    
148    checkpoint55g_post
149    o Renaming carbon AD experiments to comply with testreport conventions
150    o Updating adjoint of Held-Suarez hs94.1x64x5
151    o Fixing directives for non-ECCO forward_step, after ECCO directives
152      have been fixed to avoid recomp. of do_oceanic_phys
153      Works well for global_ocean.90x40x15,
154      but recomp. issue remains for carbon
155    o Updating adjoint output for natl_box_adjoint after
156      pkg/ecco has been modified (see taga c55d_post)
157    
158    checkpoint55f_post
159    o rename to timeave_init_fixed
160    
161    checkpoint55e_post
162    o some delicate re-shuffle of store directives to avoid one
163      extra call of do_oceanic_physics
164      affects ecco_the_main_loop.F, do_oceanic_physics.F
165      checkpoint_lev1_directives.h
166    o NB: this may break global_ocean adjoint temporarily,
167      but it is clear how to fix it. Will do later, need this now.
168    
169    checkpoint55d_post
170    o ECCO specific cost function terms (up-to-date with 1x1 runs)
171    o ecco_cost_weights is modified to 1x1 runs
172    o modifs to allow observations to be read in as
173      single file or yearly files
174    o enable to read exf forcing fields as either
175      single file or yearly files (flag useExfYearlyFields)
176    checkpoint55d_pre
177    
178    o switch between 2-level and 3-level checkpointing
179    o add ability of MNC to write local and "partial" (eg. 2D slices where
180      the full 3D field is never actually stored) arrays to NetCDF files
181      with the correct (that is, the complete multi-dimensional) set of
182      array indicies
183      - used in mom_vecinv() to write the diagFreq output
184      - tested (demonstrated) in verification/aim.5l_cs
185    o further mnc-ification
186      - add verification/lab_sea to the list with mnc setups
187      - fix undefined mnc v-names in cd_code
188      - add kpp to mnc output (both snapshot and timeave)
189    o non-hydrostatic code
190      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
191        in calc_gw.F
192      - defaults to viscAh
193      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
194        friction or Leith) in non-hydrostatic mode, as long as there is
195        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
196    o pkg/cost
197      extend simple cost functions to treat time mean quantities
198      (T,U,V) via cost_accumulate_state from cost_tile
199    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
200        be 2 times larger than the minimum size the advection scheme requires.
201        now get a perfect conservation of salt in advect_cs test-exp (updated)
202    o GGL90 (Gaspar's TKE mixed layer)
203      - add horizontal diffusion of TKE, requires exchanges in
204        do_fields_blocking_exchanges, horizontal diffusivity is zero by
205        default. In OPA there is no horizontal diffusion of TKE but the
206        mixing coefficients are computed from a horizontal average of TKE of
207        6 points or so. I think that diffusion has a little more physical
208        justification.
209      - clean up ggl90_calc in the hope of reducing memory usage (this hope
210        was in vain)
211      - mask tke-variable in ggl90_init
212    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
213    o fix biharmonic diffusion on CS-grid.
214    o more obcs stuff
215      - added obcs_external_fields_load as an alternative to the EXF-pkg option
216        for reading boundary values. This routine is called from
217        obcs_prescribe_read
218      - updated obcs_check
219      - changed sponge layer relaxation parameter units for days to seconds
220      - turned off sponge layer by default
221      - changed argument list of OBCS_CALC to myTime+deltaTclock
222      - fixed about 35 bugs in obcs_external_fields_load
223    
224    checkpoint55c_post
225    o obcs stuff
226      - new runtime flags useOBCSprescribe, useOBCSbalance
227      - re-arranged obcs_calc
228      - moved exf_getobcs to obcs_prescibe_read
229        obcs_prescibe_read is called after ORLANSKI stuff
230        and independent of it (executable can contain all).
231      - updated obcs_check
232      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
233        These may be necessary only if tangential velocities are
234        prescribed at OB, not sure, needs testing.
235    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
236      which simplifies the calls and passes the ifc check-bounds test
237    
238    checkpoint55b_post
239    o add a 2D scalar, Z location, exchange_2 routine.
240    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
241      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
242      affects advect_cs results (for the wrong reason): update output.txt
243    o use a more standard discretization for biharmonic viscosity ;
244     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
245      affects results of dome set-up: update output.txt
246    o fix gad_advection.F (CubedSphere part), back to version 1.23
247    o fix bug in mom_vi_del2uv.F (CubedSphere part).
248    
249    checkpoint55a_post
250    o merged code to
251      * prescribe/read time-dependent open boundaries
252        (works in conjunction with exf, cal)
253      * sponge layer code for open boundaries
254      * each boundary N/S/E/W now has its own CPP option
255        (healthy for the adjoint)
256    
257    checkpoint55
258    o up-to-date adjoint of previous breaks
259      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
260      - global_ocean_ebm: adjoint still needs fix (TLM ok)
261      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
262      - carbon: * remove tr1-related adjoint verification
263                * add ptracer as control variable
264    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
265      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
266    
267    checkpoint54f_post
268    o in verification/carbin/ remove experiment related to
269      ALLOW_PASSIVE_TRACER (array tr1 etc)
270      code_ad/ input_ad/ results_ad
271    
272    o add two new packages
273      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
274        + subject to optimization (memory)
275      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
276        + subject to reordering (many GOTOs in the original code)
277        + so far opps is called for every (i,j) point, and then operates in
278          the vertical; one may want to reorder the scheme in order operate in
279          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
280          fields)
281    o overhaul of IO so that we now have flags for MDSIO and/or MNC
282      - all verification tests compile and run with linux_ia32_g77
283      - defaults are compatible with current input files--nothing
284        should change if you were not previously using MNC
285      - MNC output has been added in numerous places (eg. timeave)
286        but there are still a few writes not yet do-able with MNC
287        (this is in progress)
288      - flags now allow for either/or/both use of MDSIO and MNC and
289        documentation will soon follow
290      - numerous small formatting cleanups for ProTeX
291    o add version info (via BUILD_INFO.h) to MNC and stdout
292    
293    checkpoint54e_post
294    o add two new packages
295      - pp81 (Packanowski and Philander, 1981), Richardson number and
296        stratification dependent mixing
297      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
298      - these scheme operate in a similar manner as KPP (without ghat, of
299        course), however there is only one diffusivity that is used for both
300        temperature and salinity (and passive tracers)ç
301    o add offline package
302    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
303      provided by Stephanie Dutkiewicz
304    o genmake2: add ability to search for C compilers and cleanup test output
305      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
306    
307    checkpoint54d_post
308    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
309    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
310      leading to additional shift by 5 days each year of integration
311       (i.e. leading to considerable offset over the years)
312    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
313    o start with no AB and no initial filtering (staggerTimeStep):
314      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
315    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
316      (external loading & cpl import/export stay in forward_step.F)
317    o update coupling interface to work with new staggerTimeStep
318    o change MDSIO ptracers_pickup.
319    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
320    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
321    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
322    
323    checkpoint54c_post
324    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
325      this affects (truncation error) output.txt of test-exp:
326       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
327    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
328    o change Qnet to always be the net heat flux, (+upward).
329      affects (truncation error) output of natl_box exp.: updated
330    o define the max number of passive tracers in PTRACERS_SIZE.h
331    o start to test mnc routinely in exp0
332    o add sea-ice loading (sIceLoad) as a new forcing field.
333    
334    checkpoint54b_post
335    o add testreport "-j JOBS" option for parallel builds (tested and pretty
336       impressive on Altix and Opteron systems)
337    o diagnostics can now write NetCDF files through the mnc package
338    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
339    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
340    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
341      affects (truncation error) output of lab_sea & natl_box exp.: updated
342    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
343    
344    checkpoint54a_post
345    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
346    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
347    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
348    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
349      + internal_wave (shift in writing cg2d_ini_res)
350    checkpoint54a_pre
351    
352    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
353      - modified verification/lab_sea and natl_box_adjoint accordingly
354    
355    checkpoint54
356    checkpoint53g_post
357    o prepare splitting of thermodynamics: store convect.counter in common block
358    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
359      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
360    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
361    o new parameter "nShapS": allow to treat differently S from T (nShapT)
362    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
363    o restore adjointability
364    
365    checkpoint53f_post
366    o modifications that affect AIM experiment results (update output.txt):
367      - no advection of S at top interface Nr (pkg/generic_advdiff)
368      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
369    o AIM pkg:
370      - include stability function into surf.Flux derivative relative to Tsurf
371      - calculate clear-sky radiation & surface temp. change (for diagnostics)
372    
373    checkpoint53e_post
374    o merged cylindrical coord configuration
375    o added rotating_tank experiment
376    checkpoint53e_pre
377    
378    checkpoint53d_post
379    o faulks upgraded: re-generate output.txt that have changed:
380       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
381    o Added Bryan and Lewis, 1979, vertical diffusivity profile
382    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
383    o added Sadourny discretization of Coriolis
384      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
385      - re-enabled use of omega3 (useAbsVorticity)
386    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
387      vector-invariant equations
388      - note: does *NOT* yet use same variable visc. for no-slip BC's.
389    o recoded the lateral boundary conditions for non-hydrostatic w, this time
390      hopefully without new bugs
391      - still to do: biharmonic friction for non-hydrostatic w
392    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
393    o regenerated output for global_ocean_ebm (using -ieee)
394    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
395      of mom_common/
396      - simple re-arrangement of instructions within computing loop
397    checkpoint53d_pre
398    
399    checkpoint53c_post
400    o new version of coupler for AIM+thSIce and Ocean models
401     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
402     - land: change Evaporation of snow
403     - aim with thSIce: fix bug in snow-precip.
404    o changes to calc_gw.F
405     - bug fix for w^2 term near the bottom boundary
406     - (hopefully) improve the lateral slip boundary condtions for use with
407        partial/looped cells
408      - because the bug fix changes two verification experiments anyway (exp5
409        and plume on slope), change the lateral boundary condition from half slip
410        to the value of no_slip_sides
411    o ebm package wasnt quite up to the parallel task. Fixed that.
412    o Adjoint of EBM package + verification
413      * TLM OK
414      * ADM not sufficient accuracy yet (needs further testing)
415    
416    checkpoint53b_post
417    o Commiting new energy balance model to repository
418      * package is pkg/ebm
419      * verif. is verification/global_ocean_ebm
420      * references are in ebm_driver.F
421    C      * X. Wang, P. Stone and J. Marotzke, 1999:
422    C        Global thermohaline circulation. Part I:
423    C        Sensitivity to atmospheric moisture transport.
424    C        J. Climate 12(1), 71-82
425    C      * X. Wang, P. Stone and J. Marotzke, 1999:
426    C        Global thermohaline circulation. Part II:
427    C        Sensitivity with interactive transport.
428    C        J. Climate 12(1), 83-91
429    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
430    C        Destabilization of the thermohaline circulation
431    C        by atmospheric eddy transports.
432    C        J. Climate 7(12), 1870-1882
433    o Will need long integration testing.
434    checkpoint53b_pre
435    
436    o created pkg/mom_common in preparation for variable viscosity code
437    o renamed and split ini_mnc_io
438    o pkg/land: only liquid water can diffuse or run-off
439    o AIM using land: soil wetness availability account for snow
440    o added printMapIncludesZeros to EEPARMS namelist
441    
442    checkpoint53a_post
443    o restore TAMC compatiility for exf_constants.h
444      (no usage of _d in .h)
445    o Additional storing in KPP in an attempt to fix
446      TAMC problem with adjoint of KPP code.
447      (no success...)
448      Identical code works fine with TAF.
449    o Fixed verification/natl_box_adjoint experiments.
450      Initial conditions for Experiments 4 and 5 are now
451      set to "SEAICE_initialHEFF=0", which is more reasonable,
452      and hence gives results closer to that of Experiment 2.
453      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
454    
455    checkpoint53
456    o stable checkpoint with up to date adjoint
457      TLM tests only run for 1st grdchk at the moment. Its unclear if
458      this is a code problem or a problem with resetting code for g_
459      variables that is being autogenerated wrong.
460      Otherwise:
461       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
462       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
463         are both still in chaos following their security messes.
464    
465    checkpoint52n_post
466    o various build (mostly genmake2) changes including:
467      - ability to build/run more easily within Cygwin and MacOS X
468      - more complicated Makefiles with a stronger dependence on Gnu Make
469    o pkg/seaice modifications
470      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
471        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
472        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
473      - changed proxy for geostrophic velocity and updated
474        verification/lab_sea/results/* accordingly
475      - removed ADI dynamic solver from pkg/seaice
476      - replaced all occurrences of 1/CSTICE or 1/CSUICE
477        they caused a segmentation fault under certain circumstances
478      - removed unused field WATR
479    o bug fix in exf-package:
480      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
481         now reflect that.
482    o small fixes in the cal-package:
483      - set reference date to first of January for the 'model'-calendar
484      - failing of cal_CheckDate in cal_FullDate now actually results in a
485        warning
486    o small modifications in exf-package to increase flexibility:
487      - change climtempfreeze from a constant to a runtime parameter that
488        is specified in data.exf_clim (default = -1.9)
489      - introduce runtime parameter windstressmax (default = 2.0) that is
490        specified in data.exf
491    o fix in pkg/thsice:
492      - update Evap (Tsf changes) to be consistent with Latent heat flux
493      - maintain snow precipitation unchanged (even if Tsf >=0).
494     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
495    
496    checkpoint52m_post
497    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
498      this does not change any of the results, because myIter=0 in swfrac always
499      lead to jwtype=2 (the default anyway), but the call makes little sense
500      as a default
501    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
502    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
503      atmospheric model (AIM) to use it ; add a "slab ocean" component.
504    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
505    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
506    o extending useSingleCpuIO option to work with new exch2 I/O format
507      - old-style, missing-tile I/O is still accessible by defining CPP
508        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
509    o monitor package can write to NetCDF files and/or STDOUT
510    o fix re-definition bug in MNC_GRID_INIT_ALL()
511    o doc/api_reference added
512      - a framework for building an API Reference Manual using all
513        the "protex" comments embedded in the code
514      - see pkg/generic_advdiff, pkg/mnc for examples
515    o MNC:
516      - make myThid the last argument for all subroutines
517      - new default for the grid files: NO halos
518      - add useMNC and other run-time flags
519      - separate per-file-group handling of the unlimited dimension
520      - early initialization of MNC w/ flags read at the eeboot stage
521        and lookup tables set in initialize_fixed
522      - write all MNC output to a freshly-created directory
523    o thermodynamics sea-ice (thsice) is now tested with testreport.
524    o test exp. advect_cs: use the standard cs32 grid ; update output.
525    o Added functionality to grdchk:
526      pick global i,j,k position (or nearest wet) where to perform check.
527    
528    checkpoint52l_post
529    o new land formulation:
530      a) use ground enthalpy as prognostic variable to ensure exact
531         energy conservation.
532      b) account for water temperature and for latent heat of freezing
533         in all processes (rain, run-off, ground storage)
534      c) compute surface and ground temperature implicitly.
535    o aim_v23 modification for new land model:
536      a) Treat separately land / ocean / sea-ice surface fluxes
537         to allow implicit computation of land & sea-ice surface temp.
538      b) add snow precipitation.
539    checkpoint52l_pre
540    
541    o fix problem (when 1 tile is empty) in min/max monitor.
542    o fix bug in timeAve (u,vZetatave in common block)
543    o no restoring terms under ice for pkg/seaice
544    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
545    o bug fix for pkg/seaice pickups
546    o change MNC call locations and add coordinate attributes
547    o mask vorticity at the corner ; affects global_ocean.cs output
548    o fix ini_curvilinear_grid ; test CS experiments with mpi
549    o aim.5l_cs: modify sea-ice fraction input file ; update output
550    o exf: Adding simple range check routine for exf fields after read
551    
552    checkpoint52k_post
553    o removed top-level directory "diags"
554      - we migrated these functions to pkg/timeave a long time ago
555    o fixed bug introduced in pkg/monitor
556    o accuracy ctrlprec = 32 insuffient for gradient checks using
557      averaged fields (I/O via cost_averages)
558      -> use ctrl.h in active_file*.F to control I/O precision.
559    o paramter list of CALL ADTHE_MAIN_LOOP
560    o added initial do_the_model_io to ecco
561    o set all ...Freq to zero after cost_final
562      taveFreq, dumpFreq, pChkptFreq
563    o MAIN and ECCO differentiability restored
564    
565    checkpoint52j_post
566    o fix nchklev in tamc.h for global_ocean...
567    o Bringing flow and store directives up-to-date
568    o Really weird thing!
569      call do_the_model_io from the_main_loop with parameters
570      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
571      TAF places a faulty re-call of initialise_varia
572      after cost_final call which should not be there!
573    checkpoint52j_pre
574    
575    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
576      error messages
577    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
578    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
579      debug output
580    o modfied mdsio_writefield.F to handle non-global files under exch2
581    o update AIM Cubed-Sphere exp (aim.5l_cs):
582      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
583    o update AIM Equatorial Channel exp:
584      use standard aim_v23 pkg and change the SST fields to be more realistic.
585    o globalFile now works with exch2
586    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
587      mon_vort3.F to make exch2 friendly with >1 tile per cube face
588    o limit timeave output for hi-res integrations
589    
590    checkpoint52i_post
591    o removed CPP_EEOPTIONS.h from verification/*/code
592    o updated the tiling for global_ocean_pressure
593    checkpoint52i_pre
594    
595    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
596      the old pkg/aim).
597    
598    checkpoint52h_pre
599    o shortened offending lines in exch2_send_rx?.template
600    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
601    o genmake2: add build & execute test for NetCDF code
602    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
603      old grid files, moved CPP_EEMACROS.h to pkg/exch2
604    o added useSingleCPUIO flag to monitor.F and mon_out.F
605    o added temporary hack for sea-ice dynamics on the cube:
606      metric terms are ignored and it is assumed that
607      there is no sea-ice on cube faces 1, 2, 4, and 5.
608    
609    checkpoint52f_post
610    o added exch2 cube routines to pkg/exch2
611    o modified hs94.cs-32x32x5 to use it
612    o added new grid files to hs94.cs-32x32x5
613    checkpoint52f_pre
614    
615    checkpoint52e_post
616    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
617      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
618    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
619      to work with implicit vertical advection and AB ;
620    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
621    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
622     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
623    checkpoint52e_pre
624    
625    o fix bug in impldiff when Nr=1 or Nr=2.
626    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
627    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
628    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
629      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
630    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
631    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
632    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
633    
634    checkpoint52d_post
635    o re-tiled many expts to allow comparison in multi-processor mode
636      - updated output accordingly
637      - changed hs94.128x64x5 to use intial T from file rather than use the
638        random number generator
639    o add infrastructure in model routines for fizhi and gridalt packages
640    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
641    o changes to permit hi-res, cubed-sphere, configuration
642      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
643      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
644      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
645        of surface winds for the cube
646      (A verification experiment, based on global_ocean.cs32x15, but with
647       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
648       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
649       complete with example surface forcing files and matlab scripts to look
650       at the output and compare it with that of global_ocean.cs32x15.)
651    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
652       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
653       to conform to the common rule.
654    o check-in the first version of the coupler + interfaces for multi-components
655       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
656       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
657       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
658       - ocean and atmos. share the same horizontal grid (no interpolation).
659       - exchanges between component and coupler is done in forward_step
660    o new verification experiment, cpl_aim+ocn:
661       coupled ocean - AIM atmosphere on cs32 grid.
662    
663    checkpoint52d_pre
664    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
665    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
666    
667    checkpoint52c_post
668    o Fixing OPTIONS files for use of exf:
669      - ALLOW_ECCO not needed
670      - ECCO_CPPOPTIONS.h should not be included from
671        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
672        as has been the case in the past
673      - All cal/exf related options are currently set in
674        single header file. Should remain so until we
675        agree on a consistent new policy.
676    o Removed all CPP options for cal package.
677      cal has no more CPP options.
678    o modified STOREs in GAD_ADVECTION
679    o corrected key comp. for passkey
680    
681    checkpoint52b_post
682    o new version: "thsice" of thermodynamic sea-ice pkg:
683     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
684     - modify fluxes but do not change theta directly;
685     - light cleaning of bulk_force pkg (still needed with thsice).
686     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
687       + output_thsice.txt to test thsice & bulk_force pkgs.
688    o put back grid & coriolis monitor output.
689    checkpoint52b_pre
690    
691    o call "do_the_model_io" at the beginning (=> dump initial state)
692    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
693    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
694      (need info on NUMBER_OF_PTRACERS)
695    o missing PTRACERS headers in some routines
696    o default tamc.h in pkg/autodiff supposed to crash
697      to ensure proper customization
698    
699    checkpoint52a_post
700    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
701      - moved surfaceTendencyTice from pkg/seaice to main code
702      - subroutine FREEZE_SURFACE now limits only surface temperature
703        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
704        => new output.txt for global_ocean.cs32x15 & global_with_exf
705      - keep the old version of FREEZE for backward compatibility;
706        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
707      - corresponding modifs for TAF directives
708    o added surface flux output variables to TIMEAVE_STATVARS
709    o time-averaged output for pkg/ptracers
710    o fix problem with ECCO-related divided adjoint
711      snapshot file was missing some ad-variables,
712      but no warning issued by TAF
713    
714    checkpoint52a_pre
715    o some bug fixes for #undef REAL4_IS_SLOW
716    
717    checkpoint52 = ecco_c52_e35
718    o after testing adjoints of checkpoint51u_post
719    
720    checkpoint51u_post
721    o this is the post-merge tag of the ecco-branch
722      (needs another clean checkout and re-testing)
723    o various natl_box_adjoint configs and results
724      but no input fields
725    o obcs adjoint not yet merged!
726    o adding ECCO global 1x1 and 2x2 degree configs
727    o updated/extended some store directives for seaice
728    o pkg/ecco now containes ecco-specific part of cost function
729    o top level routines the_main_loop, forward_step
730      supersede those in model/src/
731      previous input data.cost now in data.ecco
732      (new namelist ecco_cost_nml)
733    o in ctrl/ cleaned some cross-dependencies and updated CPP options
734    
735    checkpoint51t_post
736    o this is the pre-merge tag of the ecco-branch
737    
738    checkpoint51s_post
739    o cleanup: removed various obsolete #define-s
740    o pkg/grdchk
741      - renamed 'ph-grd 3' to 'grad-res'
742      - merged from ecco-branch
743        (remaining bug fixes for obcs gradient checks)
744      - additional high-precision output for testreport
745        (grep for 'precision_grdchk_result')
746    
747    checkpoint51r_post
748    o cleaned up or removed CPP_OPTIONS.h files
749    o updated results for some of the tests to reflect the new
750      optfiles (-ieee: -O0 instead of -O3)
751    
752    checkpoint51q_post
753    o cd_code:
754      - moved cd_scheme.F -> cd_code_scheme.F
755      - separate read_checkpoint from cd_code_ini_vars.F
756      - separated cd_code part from write_checkpoint
757      - updated AD_SOURCE, generated .flow
758      - added CD_CODE_VARS.h to the_main_loop
759      - Moving cd_code specific store dir.s to pkg/cd_code
760    o ctrl package totally restructured
761      - pack/unpack now optional and decoupled from
762        xx_/adxx_ I/O
763      - ctrl_pack/unpack cleaned
764        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
765      - confined inclusion of AD_CONFIG.h to where necessary.
766    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
767    
768    checkpoint51p_post
769    o create initial cd_code package
770      - WARNING: the initialization of fields within packages
771        is broken because INI_FIELDS (where READ_CHECKPOINT is
772        called) is called *before* PACKAGES_INIT_VARIABLES.
773        This seems to be backwards since
774        1) its important to initially zero the entire field including
775           the "halo" region
776        2) zeroing needs to be done *before* reading pickup info
777           and the pickup call might or might not happen in any
778           particular run
779      - this needs an overhaul for R2
780    o cleanup verification/*/code/GMREDI_OPTIONS.h
781    o cleanup testreport
782    
783    checkpoint51o_post
784    o bringing AD-related verif's up to date with genmake2
785      - carbon/
786      - global_ocean.90x40x15/
787      - hs.94.1x64x5/
788      - (front_relax/ )
789    o (more) consistent directory structure for AD-related verif.'s
790    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
791    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
792    o bug fix in find_alpha.F for MDJWF:
793      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
794        change rho -> rho-rhoConst
795      - replace call find_rho to find_rhonum
796    o initialisation of rFlx extended to full array (required by TAF)
797      and shifted to thermodynamics
798    o removed PTRACERS.h in ptracers routine
799    o added surfacetendencyPtr to S/R parameter list pracers_forcing
800    o Correcting initialisations for fVerU, fVerV.
801    o helping TAF to recognize dependency on kUp for
802      fVerU, fVerV
803    o Replacing delZ by delR in pkg/ctrl/
804    checkpoint51o_pre
805    
806    o undid all of cp51 pending some cleanups and discussion
807    o added the [#include "AD_CONFIG.h"] statement to all files that need
808       it for adjoint/tl #defines
809     o re-worked the build logic in genmake2 to support AD_CONFIG.h
810     o removed tools/genmake since it no longer works
811    
812    checkpoint51n_post
813    o modifications to make FREEZE flux visible to pkg/kpp
814      - moved surfaceTendencyTice from pkg/seaice to main code
815      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
816      - subroutine FREEZE now limits only surface temperature
817        (this means new output.txt for global_ocean.90x40x15,
818         global_ocean.cs32x15, and global_with_exf)
819    o added surface flux output variables to TIMEAVE_STATVARS
820    
821    checkpoint51n_pre
822    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
823    o added [#include "AD_CONFIG.h"] to all files that use the following
824      defines:
825      - ALLOW_ADJOINT_RUN
826      - ALLOW_TANGENTLINEAR_RUN
827      - ALLOW_ECCO_OPTIMIZATION
828    
829    checkpoint51m_post
830    o incorporating changes to get TAMC/TAF working in genmake2
831      - added new TAMC/TAF targets to the Makefile
832      - various cleanups related to package handling
833      - these changes should have no impact on the forward model
834    
835    checkpoint51l_post
836    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
837     - faster algorithm for cal_addtime.F
838     - higher precision arithmetic, where needed
839     - pkg/exf *startdate variables changed from calendar date to
840       model integration time
841    
842    checkpoint51l_pre
843    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
844    o enable to apply restoring on S & T only in a latitude band.
845    o update output (external_forcing_surf modif. change truncation errors)
846       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
847    
848    checkpoint51k_post
849    o change default to: useNHMTerms=.FALSE.
850     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
851       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
852     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
853        exp1, ideal_2D_oce
854     - change data file of oceanic exp (leave the results unchanged for now)
855       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
856    o set gravitySign automatically according to the vertical coordinate used
857      (and change sign: back to "logical" value: +1 when R increases downward)
858    o added an include barrier to the default CPP_OPTIONS.h and
859      removed the #include "PACKAGES_CONFIG.h" from it
860    o fix a bug in mom_fluxform (from chk51j_post)
861    
862    checkpoint51j_post
863    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
864    o adjusted some flow directives (dynamics, thermodynamics)
865    o added cubed-sphere case to test cost function
866    o heckpoint_lev?_directives.h now include
867      pkg-specific directives, whenever those are enabled.
868    o Moving pkg-specific flow directives to corresponding pkg
869      Moving pkg-specific differentiation list to corresponding pkg
870      Moving pkg-specific checkpoint-lev storing to corresponding pkg
871      ---> conventions are
872           - pkg_ad.flow
873           - pkg_ad_diff.list
874           - pkg_ad_check_lev?_dir.h
875    
876    checkpoint51i_post
877    o merge of the branch-genmake2
878      - knowingly breaks the older genmake
879      - automatic generation of all ALLOW_${PKG_NAME} defines
880      - new testreport supersedes older testscript
881    o large number of package inclusion and header cleanups
882    checkpoint51i_pre
883    
884    o new output for adjoin of global ocean vector invariant
885    o fix for checkpoint of thermodynamic seaice and bulk_force
886    o Steph gchem various cleanups
887    
888    checkpoint 51h_pre
889    o fixed some single quotes
890    o modify gchem pkg to be more versatile
891    o modifications to clean up dic pkg
892    o add pkg/cfc
893    
894    checkpoint51g_post
895    o provide links for ARPACK and ADM*TLM
896    o start removing verification/vero/
897    o update AD-related stuff
898      (in particular some IF-statements in model/src/ routines)
899    o adding to verification/global_ocean.90x40x15/ adjoint of
900      vector invariant setup
901    
902    checkpoint51f_post
903    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
904    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
905      of tracer Green's fucntions for ocean inversion project.
906    
907    checkpoint51f_pre
908    o Added on-the-fly spatial interpolation capability
909        "USE_EXF_INTERPOLATION" to pkg/exf.
910      - This is a temporary Cartesian-grid hack until
911        the super-duper ESMF coupler becomes available.
912      - See verification/global_with_exf/README for usage example.
913      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
914        flags and modified pkg/seaice accordingly.
915    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
916        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
917        non-local transport term.
918    
919    checkpoint51e_post
920    o pkg/mom_vecinv:
921      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
922      - add time-ave diagnostic of vorticity advection.
923    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
924    o atmospheric geopotential: - include water vapor effect;
925                                - use p^kappa in p* scaling.
926    o land pkg: read initial state from files.
927    o AIM : add stratospheric drag in the upper level
928    
929    checkpoint51d_post
930    o change function ILNBLNK (=> last non-blank char.) to return zero
931      (instead of the string length) when the string. char is empty
932    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
933    o modif's to restore TAMC compatibility
934      - avoid "_d" constructs in PARAMETER declarations
935      - avoid interrupting lines by comment lines
936    o Use cluster local disks for purely local I/O
937      vs. globally visible disks needed for ctrl stuff
938      (merged from ecco-branch)
939      - new active_file_loc... and mdsio_..._loc routines
940      - affected packages: autodiff, ctrl, grdchk, mdsio
941    
942    checkpoint51c_post
943    o introducing integer flag debugLevel
944      - debLevZero: suppress all output
945      - debLevA: standard
946      - debLevB: equivalent to current debugMode=.TRUE.
947    o introducing pathname variable mdsioLocalDir for mdsio
948      that can be specified at runtime
949      (relevant for cluster I/O to local disk)
950    `
951    >>>checkpoint51b_post
952    adjoint of ptracers
953    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
954    o extended state in checkpoint_lev?, etc.
955    o alternative ctrl/cost with tr1 or ptracer
956    o new comlev1_bibj_ptracers
957    o new ptracers.flow
958    o made ptracers_forcing same as external_forcing_s
959    o added verification for adjoint with ptracers
960      - adm. grdchk fail so far
961      - tlm. grdchk OK
962      - checked tapelev/comlev recomputations: OK
963    <<<checkpoint51b_pre
964    
965    checkpoint51a_post
966    o added code for biogeochemistry package
967      - new pkgs: dic, gchem
968      - new subroutine in ptracers
969    o modify code for biogeo packages
970      - in model/src and pkg/ptracers
971    
972    checkpoint51
973    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
974      - autodiff, ctrl, exf, grdchk, seaice
975      kept separate packages
976      - cost, ecco, obcs
977    o updating verification/internal_wave, verification/lab_sea
978      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
979    
980    checkpoint50i_post
981    o Preparing next differentiable checkpoint and sync
982      of MAIN vs. ecco-branch
983      - 1st step: this one is differentiable
984      - 2nd step: next(! not this) checkpoint will have updated packages
985                  from ecco-branch)
986    
987    checkpoint50h_post
988    o new package "land": provide surface BC for AIM.
989    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
990    o AIM: use true log-P extrapolation for near surface temp (= as in
991        F.Molteni paper) ; update aim.5l_cs output.
992    o New variable in PARM03 for more flexible pickups
993    o somewhat cleaned package initialisation sequence for
994      ctrl/ cost/ ecco/ in packages_... routines
995    
996    checkpoint50g_post
997    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
998      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
999      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1000        made the default because of faster convergence than ADI
1001    
1002    checkpoint50f_post
1003    o exf totally restructured
1004      - replaced all exf_set_ routines by one generic exf_set_gen.F
1005        and made sure it's still differentiable
1006      - split exf_getffields.F into new exf_bulkformulae.F
1007      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1008      - updated adjoint/makefile and relevant verif. accordingly
1009    
1010    checkpoint50f_pre
1011     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1012          + change Evap over land. (update aim.5l_cs output)
1013     o added missing .cvsignores and made uniform across expts
1014     o changed configuration of tidal_basin_2d expt
1015     o added pkg/debug functions for tracing code in fatal crashes
1016     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1017     o new fn in pkg/monitor to stop model if solution grows too big
1018     o removed lots of single quotes from comments
1019    
1020    checkpoint50e_post
1021    o make KPP work with PTRACERS
1022     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1023       nearly a copy of kpp_transport_s
1024     - there is no analogue to SurfaceTendencyS, so I have to use
1025       gPtr(of the surface layer) instead
1026    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1027    checkpoint50e_pre
1028    
1029    checkpoint50d_post
1030    o change kpp output from multiple-record state files to single-record state
1031      files analogous to write_state.F
1032    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1033      analogous to the cg2d-related output.
1034    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1035      so that writing to internal file fn (with length 512) fails.
1036    checkpoint50d_pre
1037    
1038    checkpoint50c_post
1039    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1040    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1041    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1042    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1043    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1044    
1045    checkpoint50c_pre
1046    Merging from release1_p13:
1047    o bug fix for pkg/seaice dynamic solver
1048    o Added SEAICE_initialHEFF to pkg/seaice
1049    
1050    checkpoint50b_post
1051    o store u*,v* in gU,V instead of in guNm1,gvNm1
1052    o in order to put the momForcing out of the Adams-Bashforth:
1053      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1054      to timestep.F
1055    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1056    o re-generate output for highly sensitive test-exp:
1057       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1058    
1059    checkpoint50b_pre
1060    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1061    o corrected CPP option mismatch in exf_Bulk... functions for case
1062      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1063    
1064    checkpoint50a_post
1065    o Bug fix for merging between c50 and KPP.
1066      ikey was passed from thermodynamics to kpp_calc via
1067      common block rather than being recomputed in kpp_calc,
1068      in contradiction with new key itdkey.
1069      New key ikppkey created, and tamc.h headers updated.
1070    
1071    checkpoint50
1072    - 2nd step of merge with ecco-branch:
1073      merge changes in ecco-branch back into main trunk
1074    - bug fix in find_alpha
1075    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1076    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1077    - merged some sliced AD support routines
1078    
1079    checkpoint49
1080    merged from ecco-branch:
1081    o exf:
1082      - Enable initialisation of forcing fields to constant
1083        (runtime) values.
1084      - in exf_getffields.F
1085        Reduce i-/j-loop to interior domain, discarding overlaps.
1086        That also fixes wrong TAF-key computations for key_1, key_2
1087        with bulf formulae.
1088      - exf_init.F modify #ifdef for exf_init_evap
1089      - exf_getffieldrec.F, ctrl_getrec.F
1090        The following INT-usages are not safe:
1091          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1092          fldcount = int(fldsecs/fldperiod) + 1
1093        and were modified.
1094    o autodiff: checkpoint_lev...
1095      - updated storing for bulk formulae (some arrays were missing)
1096      - added state for seaice package
1097      - synchronized with main branch
1098    o DIVA:
1099      Modif.s in
1100      - the_main_loop.F
1101      - the_model_main.F
1102      and added cost_final_restore.F cost_final_store.F
1103      o With these changes, it is possible to fully separate
1104        the first forward run to compute the cost function (mdthe_main_loop)
1105        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1106        into separate model executions.
1107        This enables better tuning of DIVA to given queue sizes.
1108      o Loss of cost function value in consecutive DIVA runs is
1109        fixed by storing to 'costfinal' file.
1110      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1111        beginning/end of adjoint integration is accounted for.
1112      The current changes apply to TAF-1.4.26.
1113      TAF has one remaining bug, requiring one manual change
1114      (see MITgcm manual).
1115    o cal: synchronized between MAIN and ecco-branch
1116    
1117    checkpoint48i_post
1118    o Changes to restore differentiability of code w.r.t. previous tag
1119      (mostly adding new routines to make list and replacing
1120      pressure by totPhiHyd).
1121    o Updated and merged grdchk package
1122      - has both ADM and TLM checks
1123      - works for single- and multi-proc.
1124      - output cleaned
1125      - worked successfully for parallel DIVA
1126    o genmake:
1127      - Adding -platform=SP4
1128      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1129    o Modif. for DIVA:
1130      ctrl_unpack should not be called in intermediate DIVA interval.
1131      (similar thing would apply for active files such as
1132      tbar, sbar, psbar, which should not be reinitialised;
1133      only relevant for ecco-branch)
1134    
1135    checkpoint48h_post
1136    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1137    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1138    o Added SEAICE_initialHEFF to pkg/seaice
1139    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1140    
1141    checkpoint48g_post
1142    --- EOS:
1143    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1144      store total Potential in totPhyHyd for diagnostics & EOS.
1145    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1146    --- Pressure/geopotential gradient:
1147    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1148    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1149      ( changes results of global_ocean_pressure )
1150    o NLFS + z-coord.: add eta*Rho' contribution.
1151    o accurate phiHyd when using interface-W at the middle between 2 centers
1152     ( changes results of ideal_2D_oce )
1153    o includes r* 2nd term in potential gradient.
1154    
1155    checkpoint48f_post
1156    Merging from release1_p12:
1157    o Modifications for using pkg/exf with pkg/seaice
1158      - improved description of the various forcing configurations
1159      - added basic radiation bulk formulae to pkg/exf
1160      - units/sign fix for evap computation in exf_getffields.F
1161      - updated verification/global_with_exf/results/output.txt
1162    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1163      (SBO) core products, including oceanic mass, center-of-mass,
1164      angular, and bottom pressure (see pkg/sbo/README.sbo).
1165    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1166      to avoid negative values in shallow regions.
1167      - updated verification/natl_box/results/output.txt
1168      - updated verification/lab_sea/results/output.txt
1169    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1170    o Added useSingleCpuIO option (see PARAMS.h).
1171    o Updated useSingleCpuIO option in mdsio_writefield.F to
1172      work with multi-field files, e.g., for single-file pickup.
1173    o pkg/seaice:
1174      - bug fix in growth.F: QNET for no shortwave case
1175      - added HeffFile for specifying initial sea-ice thickness
1176      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1177    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1178      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1179    o pkg/seaice:
1180      - adjoint-friendly modifications
1181      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1182    
1183    checkpoint48e_post
1184    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1185    o dynamics: change definition of computational domain & adapt mom_fluxform
1186      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1187    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1188        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1189        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1190        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1191        inverted_barometer solid-body.cs-32x32x1
1192      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1193    
1194    checkpoint48d_post
1195    o in preparation for r*:
1196     a) use pre-computed gradient of hydrostatic potential:
1197        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1198     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1199        => affects results of glob_oce_pressure (different truncation error)  
1200      update output.txt of ideal_2D_oce & global_ocean_pressure
1201    
1202    checkpoint48d_pre
1203    o in preparation for r*:
1204      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1205      pass the 2 comp. of the grad. as arguments to momentum S/R.
1206      but for the moment, only used if it does not change the results.
1207    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1208    
1209    checkpoint48c_post
1210    Modifications in treatment of initial flux forcing controls
1211    to avoid extra storing of flux fields.
1212    
1213    checkpoint48c_pre
1214    o Added tidal_basin_2d experiment (currently 1D!)
1215    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1216    
1217    checkpoint48b_post
1218    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1219     (modification to pressure gradient not yet implemented)
1220    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1221      (for U & V) that are used for vertical advection of momentum.
1222    
1223    checkpoint48a_post
1224    o In preparation for r*, use temp. array to compute vertical transport
1225       in flux-form momentum pkg. => change results of few test-exp.
1226      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1227                        lab_sea, natl_box & plume_on_slope
1228    
1229    checkpoint48
1230    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1231    
1232    checkpoint47j_post
1233    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1234    o moved adexch from forward_step to addummy_in_stepping
1235    o added exch in ctrl_map_...
1236    o aveFreq.=0. at end of cost_final to avoid overwrite in
1237      reverse checkpointing loop
1238    o Yet more changes in gmredi:
1239      * adgmredi_calc_tensor
1240        avoiding all recomputation of gmredi_slope_limit
1241      * adgmredi_x/y/rtransport
1242        added flag for excessive storing to avoid recomp. of
1243        u/v/rtans, dTdx/y/z
1244        -> this is not really necessary and very memory-consuming
1245      * adgmredi_slope_psi:
1246        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1247      * gmredi_slope_limit
1248        re-activated full calculation of taperfct for case 'ac02'
1249    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1250    
1251    checkpoint47i_post
1252    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1253    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1254      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1255    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1256    o gmredi: fix few bugs.
1257    
1258    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1259    This will be a good checkpoint to plug into the ecco-branch.
1260    o few modif.'s to get latest version adjointed
1261      (mainly kick out code in ini_linear_phisurf)
1262    o modif's to run adjoint with exactConserv
1263    o case GM_BOLUS_ADVEC should be cleaned
1264      S/R gmredi_slope_psi should be cleaned
1265    o verification/carbon now has exactConserv=.TRUE.
1266    
1267    checkpoint47g_post
1268    o time-average AIM output: becomes independent from statvars time-average
1269      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1270    o After TAF bug fix:
1271      Tested adjoint of gmredi package.
1272      Tests were done with checkpoint47 rather than with latest
1273      checkpoint47f_post since the latter is broken for the adjoint
1274      verification/carbon/ contains both ADM and TLM gradient checks.
1275    Here they are, before they get changed/lost/stolen.
1276    Mostly modif.'s to fix numerical sensitivities.
1277    Gradient checks OK for
1278    - GM_taper_scheme:
1279      * clipping
1280      * ac02
1281      * linear
1282      * glw91
1283      * dm95
1284      * ldd97
1285    - GMREDI_OPTIONS:
1286      * GM_VISBECK_VARIABLE_K
1287      * GM_NON_UNITY_DIAGONAL
1288      * GM_EXTRA_DIAGONAL
1289      * GM_BOLUS_ADVEC
1290    in conjunction with data.gmredi parameters to be checked in
1291    in a few minutes under verification/carbon/code/
1292    
1293    checkpoint47f_post
1294    Merging from release1_p10:
1295    o modifications for using pkg/exf with pkg/seaice
1296      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1297        and SEAICE_EXTERNAL_FLUXES
1298      - pkg/exf CPP options EXF_READ_EVAP and
1299        EXF_NO_BULK_COMPUTATIONS
1300      - usage examples are Experiments 8 and 9 in
1301        verification/lab_sea/README
1302      - verification/lab_sea default experiment now uses
1303        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1304    
1305    checkpoint47e_post
1306    o created a tag prior to creating a branch
1307    
1308    checkpoint47d_post
1309    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1310      at the bottom boundary had an erroneous half slip boundary condition
1311    o added bottom drag and no slip boundary condition capabilities to
1312      oceanic pressure coordinates code
1313    o added new verification experiment global_ocean_pressure, this experiment is
1314      also described in the tutorial section of the manual
1315    checkpoint47d_pre
1316    
1317    checkpoint47c_post
1318    o Added a verification experiment for a global cubed-sphere ocean run
1319      -  verification/global_ocean.cubed32x32x30
1320      -  uses pkg/therm_seaice and pkg/bulk_forcing
1321    
1322    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1323    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1324      when using P-coordinate; only implemented for atmospheric config.
1325    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1326      NOTES: requires option NONLIN_FRSURF to be "#define".
1327    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1328    
1329    checkpoint47b_post
1330    Merging from release1_p9:
1331    o pkg/seaice
1332      - removed GOTO's and added taf directives
1333      - double precision constants to reduce the g77 (Linux)
1334        to F77 (SGI) differences reported in release1_p8
1335    o tools/genmake
1336      - added SGI options
1337    o verification/testscript
1338      - updated to that of checkpoint47a_post
1339    o verification/global_ocean.90x40x15/input/eedata
1340      - modified for SGI f77 compatibility
1341    o verification/lab_sea
1342      - added description of sea-ice model
1343      - added missing matlab routines
1344      - added test of thermodynamics parallelization
1345    
1346    checkpoint47a_post
1347    o new pkg: aim_v23
1348     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1349       for now, keep the same surface forcing as before.
1350     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1351     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1352     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1353    o add diagnostic of surface correction term in monitor output
1354    
1355    o bulk_force and therm_seaice
1356    - Two packages:  bulk_force (Bulk forcing)
1357      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1358    - Earlier integration from Stephaine Dutkiewicz
1359      and Patrick Heimbach.
1360    - Two ifdef statements for compile time,
1361       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1362    
1363    checkpoint47
1364    differentiable version of checkpoint46n_post
1365    o bug fix in quasihydrostaticterms
1366    o * "clean" adjoint code (in terms of extensive recomputations)
1367        can now be obtained for all GMREDI options (i.e. for
1368        - GM_VISBECK_VARIABLE_K
1369        - GM_NON_UNITY_DIAGONAL
1370        - GM_EXTRA_DIAGONAL
1371        - GM_BOLUS_ADVEC )
1372      * However, wrong gradient check problem remains unsolved.
1373      * New CPP options have been introduced for different
1374        tapering schemes
1375    o external_fields_load now part of differentiation list
1376    o pressure needs multiple storing;
1377      would be nice to have store_pressure at beginning or
1378      end of forward_step, e.g. by having phiHyd global (5-dim.)
1379      (NB: pressure is needed for certain cases in find_rho,
1380      which is also invoked through convective_adjustment).
1381    o recomputations in find_rho for cases
1382     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1383    o #define ATMOSPHERIC_LOADING should be differentiable
1384    o ini_forcing shifted to begining of initialise_varia
1385    o Incorporating QNVS line search routines into MITgcm
1386      (this is separate code, and therefore not under pkg)
1387      lsopt/, optim/
1388    o Updated verification/carbon/
1389      - #define GM_VISBECK_VARIABLE_K
1390      - GM_taper_scheme    = 'ldd97'    
1391    
1392    checkpoint46n_post
1393    Merging from release1_p8:
1394    o verification/natl_box:
1395      updating new external_fields_load routine
1396    o New package: pkg/seaice
1397      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1398      The sea-ice code is based on Hibler (1979-1980).
1399      Two sea-ice dynamic solvers, ADI and LSR, are included.
1400      In addition to computing prognostic sea-ice variables and diagnosing
1401      the forcing/external data fields that drive the ocean model,
1402      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1403      The implied surface heat flux is then stored in variable
1404      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1405      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1406      non-local transport term.  Because this call precedes model
1407      thermodynamics, temperature under sea-ice may not be "exactly" at
1408      the freezing point by the time theta is dumped or time-averaged.
1409      N.B.: fairly large differences in accuracy occur across
1410            different platforms/compilers; comparison between
1411            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1412            generated output gives:
1413       T           S           U           V
1414      C D M    c        m  s        m  s        m  s        m  s
1415      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1416      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1417      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1418    
1419      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1420    o GAD:
1421      - generated new common blocks to account for call of
1422        same gad routines with differing traceridentities
1423        (needed to modify tracerIdentity indices in GAD.h)
1424      - generated separate common blocks for case useCubedSphereExchange
1425        (Department of Futurology)
1426      - parameter lists to gmredi_?transport: added tracerIdentity
1427      - added new key indices to tamc.h
1428    o external_fields_load:
1429      - added this routine to TAF list
1430      - needed to make some common blocks global and additional storing
1431        along the same lines as exf package (checkpoint_lev?_directives.h)
1432    o exf:
1433      updated external forcing package
1434      - bug fixes carried over from ecco-branch
1435        (missing OBCS_OPTIONS.h in two routines)
1436      - enable easy to use "no forcing".
1437      - added exf I/O for atmospheric loading
1438      - added exf I/O for runoff data
1439      - transfered scaling between exf <-> MITgcm to exf namelist
1440    o Adding new verification experiment global_with_exf.
1441      This verification experiment is almost identical to the
1442      global_ocean.90x40x15 experiment, except that it uses
1443      the exf (and cal) package instead of the
1444      external_fields_load routine (cf README file).
1445    
1446    checkpoint46m_post
1447    o modified testscript to return -- when there are no lines of "%MON" output
1448    o added new flag "quasiHydrostatic" for QH mode
1449      and new routine quasihydrostaticterms()
1450    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1451      New routine: mom_u_coriolis_nh()
1452    o fixed sign of non-hydrostatic metric terms in u and v equations.
1453      Depend on correct sign of gravitySign.
1454    o added work.pc* to .cvsignore in aim directories using ifc
1455    o introduced flag for controllin non-hydrostatic metric terms
1456    o removed gravitySign from PARM04
1457    o switched to g77/ifc from pgf77 in aim experiments
1458    
1459    checkpoint46l_post
1460    o made convective adjustment work with pressure coordinates:
1461     - changed the direction of k-loop in convective_adjustment.F for the
1462       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1463     - adjusted the reference pressure k-index in convective_adjustment.F
1464     - adjusted the convection condition in convect.F (in analogy to
1465       calc_ivdc.F)
1466     - convective_adjustment no longer computes anything on the halos
1467     - removed the warnings about negative salinity from find_rho.F and
1468       find_alpha.F; instead the new routine look_for_neg_salinity, called
1469       at the beginning of find_rho, find_alpha, and find_beta, does a
1470       check of the entire slice, if CPP-option
1471       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1472    checkpoint46l_pre
1473    
1474    checkpoint46k_post
1475    o fixed the verification/global_ocean.90x40x15 experiment:
1476     - new bathymetry (the world according to A., JMC, and M.)
1477     - new initial fields and forcing fields (*.bin files)
1478     - new POLY3.COEFFS (for the next release one should switch to a full
1479       equation of state: JMD95P or MDJWF)
1480     - fixed several errors and redundancies in the data file
1481     - experiment uses looped cells
1482     - added matlab directory with diagnostic scripts for plotting of output
1483    
1484    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1485     - read AIM physics parameters from a file (data.aimphys)
1486     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1487    
1488    checkpoint46j_post
1489    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1490    o move wVel computation at the end of the time step, in S/R integr_continuity
1491    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1492    o update timeave pkg for wVel diagnostic.
1493    checkpoint46j_pre
1494    
1495    checkpoint46i_post
1496    o Clean up AIM package (and keep the results unchanged):
1497      include CPP_OPTION and use IMPLICT NONE in all routines ;
1498      declare all the variables _RL ; use _d 0 for all numerical constants.
1499      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1500    
1501    checkpoint46h_post
1502    o cleaned up the use of rhoNil and rhoConst.
1503      - rhoNil should only appear in the LINEAR equation of state, everywhere
1504        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1505        and the dynamical equations are all divided by rhoConst
1506    o introduced new parameter rhoConstFresh, a reference density of fresh
1507      water, to remove the fresh water flux's dependence on rhoNil. The default
1508      value is 999.8 kg/m^3
1509    o cleanup up external_forcing.F and external_forcing_surf.F
1510      - can now be used by both OCEANIC and OCEANICP
1511    checkpoint46h_pre
1512    
1513     Added code to convert surface volume flux (fresh water) into
1514     a mass flux when using P coordinates in the ocean (OCEANICP).
1515     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1516    
1517    checkpoint46g_post
1518    o Include a new diagnostic variable phiHydLow for the ocean model
1519      - in z-coordinates, it is the bottom pressure anomaly
1520      - in p-coordinates, it is the sea surface elevation
1521      - in both cases, these variable have global drift, reflecting the mass
1522        drift in z-coordinates and the volume drift in p-coordinates
1523      - included time averaging for phiHydLow, be aware of the drift!
1524    o depth-dependent computation of Bo_surf for pressure coordinates
1525      in the ocean (buoyancyRelation='OCEANICP')
1526      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1527        Theta, Salinity, and Pressure in the parameter list. This routine is
1528        presently contained in find_rho.F. This routine does not give the
1529        correct density for 'POLY3', which would be a z-dependent reference
1530        density.
1531    o cleaned up find_rho
1532      - removed obsolete 'eqn' from the parameter list.
1533    o added two new verification experiments: gop and goz
1534      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1535    checkpoint46g_pre
1536    
1537    checkpoint46f_post
1538    o Enable tangent linear (forward mode) gradient checks:
1539      - extended active file handling to g_... files
1540      - added TANGENT_SIMULATION to theSimulationMode
1541      - extended grdchk package accordingly
1542    o added tangent linear setup in verification/carbon/code_ftl
1543    o added adjoint setup in verification/front_relax/code_ad
1544    
1545    checkpoint46e_post
1546    o Added new equation of state -> MDJWF
1547      - EOS of McDougall et al., 2002, JAOT, submitted
1548      - caveat: the equation of state is only valid for a smaller (more
1549        realistic?) range of values than JMD95P/Z and UNESCO
1550      - added masks to the calculation of pressure in store_pressure
1551      - added more check values for density in check_eos (ini_eos.F), some of
1552        the old check values are out of the range of the MDJWF-eos, so don't
1553        expect perfect matches for those
1554    checkpoint46e_pre
1555    
1556    checkpoint46d_post
1557    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1558      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1559      case of pressure coordinates. eosType='JMD95Z' in
1560      combination with buoyancyRelation='OCEANICP' now causes an error.
1561    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1562      in find_alpha/beta.
1563    checkpoint46d_pre
1564    
1565    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1566      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1567    
1568    checkpoint46c_post
1569    o Changes necessary for ocean in p-coordinates
1570     -  Added new buoyancy relation = 'OCEANICP'
1571     -  Added new parameters = gravitySign (this used to be contained inside
1572        the factor dRdZ which I added when we first switched to R coordinates).
1573     X GM/Redi is not compatible (yet)
1574     X bottom drag and no-slip need to be debugged.
1575    checkpoint46c_pre
1576    
1577    checkpoint46b_post
1578    o Added new equation of state -> JMD95Z and JMD95P
1579      - EOS of Jackett and McDougall, 1995, JAOT
1580      - moved all EOS parameters into EOS.h
1581      - new routines ini_eos.F, store_pressure.F
1582    o Added UNESCO EOS, but not recommended because it requires
1583      in-situ temperature (see JMD95)
1584    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1585      unesco.f to be used with POLY3
1586    checkpoint46b_pre
1587    
1588    checkpoint46a_post
1589    o Added (atmospheric) pressure loading
1590      - new field in FFIELDS.h, etc...
1591      - new cpp flag ATMOSPHERIC_LOADING
1592    o Changed hFacC to _hFacC in calc_phi_hyd.F
1593    o Added SHORTWAVE_HEATING to some files for consistency
1594    checkpoint46a_pre
1595    
1596    checkpoint46
1597    further merges from release1_p5
1598    o new ctrl package
1599      - adopted from ECCO environment to enable optimization
1600      - added Eliassen Palm fluxes to controls
1601    o added Eliassen Palm flux controls to gradient check package
1602    o cost package
1603      - Compatible with new ctrl package
1604      - added Eliassen Palm cost hooks
1605      - modif's of existing cost functions
1606    o Adjoint-related bug fixes in kpp:
1607      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1608      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1609    o autodiff package
1610      - flow directives:
1611        + new for S/R do_the_model_io
1612        + enhanced for S/R checkpoint
1613        + new gmredi.flow
1614      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1615        disable adcommon.h/g_common.h by default.
1616      - fixed problem for adjoint of global_max
1617    o modified verification/carbon/
1618    o New setup for adjoint of global_ocean
1619    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1620    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1621    o incorporated hooks for sponge layer code (external_forcing.F)
1622    
1623    checkpoint45d_post
1624    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1625    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1626      (affects plume_on_slope "cg2d" output)
1627    o add new parameter deltaTfreesurf for free-surface time stepping
1628    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1629    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1630    o change phiMin in exp1 (to agree with documentation)
1631    o add new flags:
1632     - T,S forcing inside/outside Adams-Bashforth
1633     - turn off temp,salt advection and/or forcing
1634     - for each tracer, define internal flag for multiDimAdvection & A-B
1635    o monitor: change definition of KE to check conservation of Energy
1636    
1637    checkpoint45c_post
1638    o Removed f90 comments ("!")
1639    o Modified initialisations to enable exf package for MITgcm
1640      (without invoking ECCO_PACKAGE).
1641    o modifications to gradient check package (Martin Losch)
1642      - enable centered differences
1643      - modified format of standard output
1644    
1645    checkpoint45b_post
1646    o cleaned exchange calls in cg2d
1647    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1648    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1649      to configure barotropic setup (Martin Losch)
1650    o moved some initialisations within bi,bj loop in dynamics
1651      (TAF flow dependency)
1652    o in initialise_varia, moved call packages_init_variables
1653      before convective_adjustment_init
1654      (corresponding adjustment of TAF tape initialisation).
1655    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1656    
1657    checkpoint45a_post
1658    o compute Rho over the whole domain (extend iMin,jMin indices)
1659    o specific exchange for X-slice domain (case Ny=1)
1660  o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code  o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1661  o solve_for_pressure : set cg2d_x to zero where OBCS are applied  o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1662    

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