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revision 1.32 by adcroft, Thu Nov 30 16:51:40 2000 UTC revision 1.425 by dimitri, Mon Dec 20 23:32:52 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o exf_getffields interpolation defaults to bilinear for all scalar forcing
7      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
8      spurious negative numbers for precipitation and humidity.  Will cause
9      some small numerical differences for integrations using pkg/exf/exf_interp.F.
10    
11    checkpoint57b_post
12    o simplify options in diagnostics_fill arguments (remove weird combinations)
13    o fix MNC coordinate variables so that they now contain per-face index
14      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
15      general, EXCH2 grids are only aligned to a "local" coordinate system
16    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
17    o Implement instantaneous output within pkg diagnostics:
18      setting a negative frequency in data.diagnostics produces
19     "snap-shot" output (as opposed to time-average if freq > 0)
20    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
21      NOTE: change ptracer diagnostics name: use 2 characters to work with
22            more than 9 tracers. Add also diagnostics of advect & diffus flux.
23    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
24      becomes the coordinate variable for the 'T' dimension
25    o add CF-style coordinate variables to MNC
26      - just a first cut:  numbers are meaningless on the cubesphere and
27        missing along the T axis but otherwise it works!
28    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
29    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
30    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
31      this is based directly on what the model compute, so that the content of
32      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
33    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
34    o clean up build options files for SunOS, in particular
35      - remove -traditional from xmakedepend
36      - change -xarch=v9 to -xarch=native for f77
37      - restore use of make (not gmake)
38      - add CC=gcc if using g77
39    o changes per discussion of AM, JMC, & EH3 today:
40      - move redundant "grid" variables out of "state" -- in preparation of
41        creating proper CF-style coordinate variables and in recognition
42        that any/all grid variables can be easily copied (eg. w/NCO) from
43        the grid files into any of the other NetCDF files
44      - *always* output grid variables with MDSIO (this will eventually be
45        changed)
46      - output MNC grid file if useMNC is true
47    o every instance of _END_MASTER() has been found and replaced with
48      _END_MASTER( myThid ) in order to satisfy certain picky Sun
49      preprocessors
50    o re-arrange diagnostics pkg initialisation:
51     - allow each package to extend the available diagnostics list
52     - add some checking and fix small problems (multi-threaded, ...)
53     - new S/R diagnostics_fill (replace fill_diagnostics):
54       look through the short list of active diag. (instead of the long list)
55       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
56    
57    checkpoint57a_post
58    o this set of changes restores TAMC compatibility
59      tested for global_ocean.90x40x15 adjoint on trough
60      (what a pain)
61    
62    checkpoint57a_pre
63    o some modifs in tools/build_options for sunos
64    o call ctrl_pack for ctrl at end for optimcycle=0
65    
66    checkpoint57
67    o add horizontal bi-harmonic viscosity for vertical velocity
68      - new parameter viscA4W (defaults to viscA4)
69      - affects only non-hydrostatic code
70      - to be done: no-slip lateral boundary conditions
71    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
72    o implement Implicit Vertical advection for pTracers
73    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
74      (implemented also for implicit vertical diffusion & advection)
75    o OBCS: extend application of tracer open boundary conditions
76      to a strip beyond the boundary of width Olx/Oly
77    o add call monitor to TAF set of required calls (flow directives)
78      and include in natl_box_adjoint
79    o untangle a few ifdefs related to cost, ctrl, autodiff
80      untangel a few ALLOW_ECCO_OPTIMIZATION
81    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
82      (theta2, salt2 in ecco_cost_weights)
83    
84    checkpoint56c_post
85    o OBCS as control variables
86      - update ctrl_ad_diff.list, obcs_ad_diff.list
87      - remove balance of obcs controls from default
88      - fix index bug nobcs in ctrl_init
89      - fix dummy fields filen in ctrl_pack
90      - add dummy weights for obcs
91    o lsopt: comment out fort.94 output
92    o optim:
93      - remove unnecessary header files
94      - adjusted namelists
95      - add xerbla.F to Makefile
96    o exf:
97      - multiple modifications of exf_check_range
98      - unit change in exf_init_runoff from [m/year] to [m/s]
99    o mdsio:
100      - i/o-vector change debugLevel from debLevA to debLevB
101    
102    checkpoint56b_post
103    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
104      is called from DO_THE_MODEL_IO
105      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
106      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
107      - clean up PTRACERS_WRITE_TIMEAVE a little
108    o add another verification experiment that tests both the cfc-pkg and
109      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
110      reactive tendencies treated inline with regular timestepping
111    o testreport previously did a lousy job of comparing small numbers, so
112      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
113      implemented in the little c-progam tmp_cmpnum.c which is embedded in
114      testreport.
115    o ptracers_monitor: bug fix for MPI
116    
117    checkpoint56a_post
118    o GCHEM: finish reorganizating the package
119      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
120        (introduces another 3D-array for each passive tracer, but only if
121        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
122        gchemTendency is not needed because the timestep is done separately)
123      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
124      - GCHEM is now---more or less cleanly---separate from PTRACERS
125      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
126        so clear to me how that should be done in a general way.
127    o CFC: improve formatting of output in CFC_ATMOS
128    o PTRACERS:
129      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
130        that ALL experiments with ptracers enable can be checked. This makes
131        GCHEM_MONITOR obsolete.
132      - include a runtime parameter PTRACERS_monitorFreq that defaults to
133        monitorFreq
134      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
135    o add PTRACERS (PTR0[1-5]) to testreport output
136    o exf_check_range:
137      * default changed to .TRUE.
138      * will check values for niter0 if debLevA, every timestep if debLevB
139      * STOP in exf_check_range if 'out of range'
140      * range chosen generous to allow for potential extema
141      TBD: a version with stricter range
142           permitted range would be runtime parameters
143    o GMredi:
144      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
145      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
146      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
147    o GCHEM:
148      - move call to GCHEM_FORCING_SEP, so that it is now called before
149        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
150      - introduced a useGCHEM runtime flag and applied it everywhere.
151      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
152        this flag is now only visible within GCHEM-pkg routines.
153      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
154        be replaced by a 3D array that is computed before thermodynamics; for
155        this, the tracer ID iTracer had to be included into the parameter list
156        of ptracers_forcing
157      - set up forward_step to call gchem_forcing, that will replace
158        gchem_forcing_int in ptracers_forcing
159      - cleaning up
160    o small cleaning of exch2: remove files that are also in eesupp/src
161    
162    checkpoint56
163    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
164    o mnc: cleanup "full" files--fixes out-of-memory problem
165    o ECCO-GODAE
166      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
167      * fully merged and updated from SIO code
168        windstress sign change affects
169        - exf_inscal_[u/v]stress
170        - sign of xx_tau[u/v] adjustments
171        - signs in cost_scat
172      * ctrl_get_gen: avoid update of tau[u/v] for first few days
173      * natl_box_adjoint updated and compressed
174      * 2-level checkpoint switch added
175        (tested in EXP. 1 of natl_box_adjoint)
176      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
177    o SVD
178      * first complete, non-hacked version for SVD calculations
179      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
180        performed via direct access files admtlm_vector.it????
181        (via ctrl_[un]pack)
182      * optimcycle is used for ARPACK iteration counter
183        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
184      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
185        and add linear transforms where necessary
186      * controls are initial/final SST, SSS (can be extended; need to check
187        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
188    o mdsio: filename info to both stderr, stdout
189    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
190      from sign change
191    
192    checkpoint55j_post
193    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
194      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
195    o add consistent build directories and .cvsignore files to verification
196    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
197    o make all subroutines 30 or less characters in length for certain older
198      compilers to work (a thorough search only turns up two routines in
199      pkg/ptracers)
200    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
201      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
202    
203    checkpoint55i_post
204    o change arrays for total vertical diffusivity (2.D if explicit,
205      3.D if implicit) ; each ptracer uses its own background value.
206    o added mnc/NetCDF output capability to ocn_compon_interf
207      - added bits to verification/cpl_aim+ocn so that it can run on
208        ITRDA and other clusters without the mpirun "-wd" option
209    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
210      configuration
211    o give MNC the ability to create additional files rather than
212      exceeding a specified file size limit "MNC_MAX_FILESIZE"
213      - the default is just less than 2GB which is a practical limit
214        on many systems
215    o Compute the non-local term using either KPP vertical diffusivity (=default)
216       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
217    
218    checkpoint55h_post
219    o add verification test "vermix"
220    o remove all the *_ioinc flags and replace with the single global
221      outputTypesInclusive flag
222    o allow to set a vertical profile of vertical diffusivity for T & S
223    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
224    o useMNC moved from data.mnc to data.pkg
225    
226    checkpoint55g_post
227    o Renaming carbon AD experiments to comply with testreport conventions
228    o Updating adjoint of Held-Suarez hs94.1x64x5
229    o Fixing directives for non-ECCO forward_step, after ECCO directives
230      have been fixed to avoid recomp. of do_oceanic_phys
231      Works well for global_ocean.90x40x15,
232      but recomp. issue remains for carbon
233    o Updating adjoint output for natl_box_adjoint after
234      pkg/ecco has been modified (see taga c55d_post)
235    
236    checkpoint55f_post
237    o rename to timeave_init_fixed
238    
239    checkpoint55e_post
240    o some delicate re-shuffle of store directives to avoid one
241      extra call of do_oceanic_physics
242      affects ecco_the_main_loop.F, do_oceanic_physics.F
243      checkpoint_lev1_directives.h
244    o NB: this may break global_ocean adjoint temporarily,
245      but it is clear how to fix it. Will do later, need this now.
246    
247    checkpoint55d_post
248    o ECCO specific cost function terms (up-to-date with 1x1 runs)
249    o ecco_cost_weights is modified to 1x1 runs
250    o modifs to allow observations to be read in as
251      single file or yearly files
252    o enable to read exf forcing fields as either
253      single file or yearly files (flag useExfYearlyFields)
254    checkpoint55d_pre
255    
256    o switch between 2-level and 3-level checkpointing
257    o add ability of MNC to write local and "partial" (eg. 2D slices where
258      the full 3D field is never actually stored) arrays to NetCDF files
259      with the correct (that is, the complete multi-dimensional) set of
260      array indicies
261      - used in mom_vecinv() to write the diagFreq output
262      - tested (demonstrated) in verification/aim.5l_cs
263    o further mnc-ification
264      - add verification/lab_sea to the list with mnc setups
265      - fix undefined mnc v-names in cd_code
266      - add kpp to mnc output (both snapshot and timeave)
267    o non-hydrostatic code
268      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
269        in calc_gw.F
270      - defaults to viscAh
271      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
272        friction or Leith) in non-hydrostatic mode, as long as there is
273        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
274    o pkg/cost
275      extend simple cost functions to treat time mean quantities
276      (T,U,V) via cost_accumulate_state from cost_tile
277    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
278        be 2 times larger than the minimum size the advection scheme requires.
279        now get a perfect conservation of salt in advect_cs test-exp (updated)
280    o GGL90 (Gaspar's TKE mixed layer)
281      - add horizontal diffusion of TKE, requires exchanges in
282        do_fields_blocking_exchanges, horizontal diffusivity is zero by
283        default. In OPA there is no horizontal diffusion of TKE but the
284        mixing coefficients are computed from a horizontal average of TKE of
285        6 points or so. I think that diffusion has a little more physical
286        justification.
287      - clean up ggl90_calc in the hope of reducing memory usage (this hope
288        was in vain)
289      - mask tke-variable in ggl90_init
290    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
291    o fix biharmonic diffusion on CS-grid.
292    o more obcs stuff
293      - added obcs_external_fields_load as an alternative to the EXF-pkg option
294        for reading boundary values. This routine is called from
295        obcs_prescribe_read
296      - updated obcs_check
297      - changed sponge layer relaxation parameter units for days to seconds
298      - turned off sponge layer by default
299      - changed argument list of OBCS_CALC to myTime+deltaTclock
300      - fixed about 35 bugs in obcs_external_fields_load
301    
302    checkpoint55c_post
303    o obcs stuff
304      - new runtime flags useOBCSprescribe, useOBCSbalance
305      - re-arranged obcs_calc
306      - moved exf_getobcs to obcs_prescibe_read
307        obcs_prescibe_read is called after ORLANSKI stuff
308        and independent of it (executable can contain all).
309      - updated obcs_check
310      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
311        These may be necessary only if tangential velocities are
312        prescribed at OB, not sure, needs testing.
313    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
314      which simplifies the calls and passes the ifc check-bounds test
315    
316    checkpoint55b_post
317    o add a 2D scalar, Z location, exchange_2 routine.
318    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
319      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
320      affects advect_cs results (for the wrong reason): update output.txt
321    o use a more standard discretization for biharmonic viscosity ;
322     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
323      affects results of dome set-up: update output.txt
324    o fix gad_advection.F (CubedSphere part), back to version 1.23
325    o fix bug in mom_vi_del2uv.F (CubedSphere part).
326    
327    checkpoint55a_post
328    o merged code to
329      * prescribe/read time-dependent open boundaries
330        (works in conjunction with exf, cal)
331      * sponge layer code for open boundaries
332      * each boundary N/S/E/W now has its own CPP option
333        (healthy for the adjoint)
334    
335    checkpoint55
336    o up-to-date adjoint of previous breaks
337      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
338      - global_ocean_ebm: adjoint still needs fix (TLM ok)
339      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
340      - carbon: * remove tr1-related adjoint verification
341                * add ptracer as control variable
342    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
343      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
344    
345    checkpoint54f_post
346    o in verification/carbin/ remove experiment related to
347      ALLOW_PASSIVE_TRACER (array tr1 etc)
348      code_ad/ input_ad/ results_ad
349    
350    o add two new packages
351      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
352        + subject to optimization (memory)
353      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
354        + subject to reordering (many GOTOs in the original code)
355        + so far opps is called for every (i,j) point, and then operates in
356          the vertical; one may want to reorder the scheme in order operate in
357          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
358          fields)
359    o overhaul of IO so that we now have flags for MDSIO and/or MNC
360      - all verification tests compile and run with linux_ia32_g77
361      - defaults are compatible with current input files--nothing
362        should change if you were not previously using MNC
363      - MNC output has been added in numerous places (eg. timeave)
364        but there are still a few writes not yet do-able with MNC
365        (this is in progress)
366      - flags now allow for either/or/both use of MDSIO and MNC and
367        documentation will soon follow
368      - numerous small formatting cleanups for ProTeX
369    o add version info (via BUILD_INFO.h) to MNC and stdout
370    
371    checkpoint54e_post
372    o add two new packages
373      - pp81 (Packanowski and Philander, 1981), Richardson number and
374        stratification dependent mixing
375      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
376      - these scheme operate in a similar manner as KPP (without ghat, of
377        course), however there is only one diffusivity that is used for both
378        temperature and salinity (and passive tracers)ç
379    o add offline package
380    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
381      provided by Stephanie Dutkiewicz
382    o genmake2: add ability to search for C compilers and cleanup test output
383      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
384    
385    checkpoint54d_post
386    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
387    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
388      leading to additional shift by 5 days each year of integration
389       (i.e. leading to considerable offset over the years)
390    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
391    o start with no AB and no initial filtering (staggerTimeStep):
392      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
393    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
394      (external loading & cpl import/export stay in forward_step.F)
395    o update coupling interface to work with new staggerTimeStep
396    o change MDSIO ptracers_pickup.
397    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
398    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
399    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
400    
401    checkpoint54c_post
402    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
403      this affects (truncation error) output.txt of test-exp:
404       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
405    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
406    o change Qnet to always be the net heat flux, (+upward).
407      affects (truncation error) output of natl_box exp.: updated
408    o define the max number of passive tracers in PTRACERS_SIZE.h
409    o start to test mnc routinely in exp0
410    o add sea-ice loading (sIceLoad) as a new forcing field.
411    
412    checkpoint54b_post
413    o add testreport "-j JOBS" option for parallel builds (tested and pretty
414       impressive on Altix and Opteron systems)
415    o diagnostics can now write NetCDF files through the mnc package
416    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
417    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
418    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
419      affects (truncation error) output of lab_sea & natl_box exp.: updated
420    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
421    
422    checkpoint54a_post
423    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
424    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
425    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
426    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
427      + internal_wave (shift in writing cg2d_ini_res)
428    checkpoint54a_pre
429    
430    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
431      - modified verification/lab_sea and natl_box_adjoint accordingly
432    
433    checkpoint54
434    checkpoint53g_post
435    o prepare splitting of thermodynamics: store convect.counter in common block
436    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
437      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
438    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
439    o new parameter "nShapS": allow to treat differently S from T (nShapT)
440    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
441    o restore adjointability
442    
443    checkpoint53f_post
444    o modifications that affect AIM experiment results (update output.txt):
445      - no advection of S at top interface Nr (pkg/generic_advdiff)
446      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
447    o AIM pkg:
448      - include stability function into surf.Flux derivative relative to Tsurf
449      - calculate clear-sky radiation & surface temp. change (for diagnostics)
450    
451    checkpoint53e_post
452    o merged cylindrical coord configuration
453    o added rotating_tank experiment
454    checkpoint53e_pre
455    
456    checkpoint53d_post
457    o faulks upgraded: re-generate output.txt that have changed:
458       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
459    o Added Bryan and Lewis, 1979, vertical diffusivity profile
460    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
461    o added Sadourny discretization of Coriolis
462      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
463      - re-enabled use of omega3 (useAbsVorticity)
464    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
465      vector-invariant equations
466      - note: does *NOT* yet use same variable visc. for no-slip BC's.
467    o recoded the lateral boundary conditions for non-hydrostatic w, this time
468      hopefully without new bugs
469      - still to do: biharmonic friction for non-hydrostatic w
470    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
471    o regenerated output for global_ocean_ebm (using -ieee)
472    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
473      of mom_common/
474      - simple re-arrangement of instructions within computing loop
475    checkpoint53d_pre
476    
477    checkpoint53c_post
478    o new version of coupler for AIM+thSIce and Ocean models
479     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
480     - land: change Evaporation of snow
481     - aim with thSIce: fix bug in snow-precip.
482    o changes to calc_gw.F
483     - bug fix for w^2 term near the bottom boundary
484     - (hopefully) improve the lateral slip boundary condtions for use with
485        partial/looped cells
486      - because the bug fix changes two verification experiments anyway (exp5
487        and plume on slope), change the lateral boundary condition from half slip
488        to the value of no_slip_sides
489    o ebm package wasnt quite up to the parallel task. Fixed that.
490    o Adjoint of EBM package + verification
491      * TLM OK
492      * ADM not sufficient accuracy yet (needs further testing)
493    
494    checkpoint53b_post
495    o Commiting new energy balance model to repository
496      * package is pkg/ebm
497      * verif. is verification/global_ocean_ebm
498      * references are in ebm_driver.F
499    C      * X. Wang, P. Stone and J. Marotzke, 1999:
500    C        Global thermohaline circulation. Part I:
501    C        Sensitivity to atmospheric moisture transport.
502    C        J. Climate 12(1), 71-82
503    C      * X. Wang, P. Stone and J. Marotzke, 1999:
504    C        Global thermohaline circulation. Part II:
505    C        Sensitivity with interactive transport.
506    C        J. Climate 12(1), 83-91
507    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
508    C        Destabilization of the thermohaline circulation
509    C        by atmospheric eddy transports.
510    C        J. Climate 7(12), 1870-1882
511    o Will need long integration testing.
512    checkpoint53b_pre
513    
514    o created pkg/mom_common in preparation for variable viscosity code
515    o renamed and split ini_mnc_io
516    o pkg/land: only liquid water can diffuse or run-off
517    o AIM using land: soil wetness availability account for snow
518    o added printMapIncludesZeros to EEPARMS namelist
519    
520    checkpoint53a_post
521    o restore TAMC compatiility for exf_constants.h
522      (no usage of _d in .h)
523    o Additional storing in KPP in an attempt to fix
524      TAMC problem with adjoint of KPP code.
525      (no success...)
526      Identical code works fine with TAF.
527    o Fixed verification/natl_box_adjoint experiments.
528      Initial conditions for Experiments 4 and 5 are now
529      set to "SEAICE_initialHEFF=0", which is more reasonable,
530      and hence gives results closer to that of Experiment 2.
531      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
532    
533    checkpoint53
534    o stable checkpoint with up to date adjoint
535      TLM tests only run for 1st grdchk at the moment. Its unclear if
536      this is a code problem or a problem with resetting code for g_
537      variables that is being autogenerated wrong.
538      Otherwise:
539       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
540       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
541         are both still in chaos following their security messes.
542    
543    checkpoint52n_post
544    o various build (mostly genmake2) changes including:
545      - ability to build/run more easily within Cygwin and MacOS X
546      - more complicated Makefiles with a stronger dependence on Gnu Make
547    o pkg/seaice modifications
548      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
549        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
550        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
551      - changed proxy for geostrophic velocity and updated
552        verification/lab_sea/results/* accordingly
553      - removed ADI dynamic solver from pkg/seaice
554      - replaced all occurrences of 1/CSTICE or 1/CSUICE
555        they caused a segmentation fault under certain circumstances
556      - removed unused field WATR
557    o bug fix in exf-package:
558      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
559         now reflect that.
560    o small fixes in the cal-package:
561      - set reference date to first of January for the 'model'-calendar
562      - failing of cal_CheckDate in cal_FullDate now actually results in a
563        warning
564    o small modifications in exf-package to increase flexibility:
565      - change climtempfreeze from a constant to a runtime parameter that
566        is specified in data.exf_clim (default = -1.9)
567      - introduce runtime parameter windstressmax (default = 2.0) that is
568        specified in data.exf
569    o fix in pkg/thsice:
570      - update Evap (Tsf changes) to be consistent with Latent heat flux
571      - maintain snow precipitation unchanged (even if Tsf >=0).
572     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
573    
574    checkpoint52m_post
575    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
576      this does not change any of the results, because myIter=0 in swfrac always
577      lead to jwtype=2 (the default anyway), but the call makes little sense
578      as a default
579    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
580    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
581      atmospheric model (AIM) to use it ; add a "slab ocean" component.
582    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
583    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
584    o extending useSingleCpuIO option to work with new exch2 I/O format
585      - old-style, missing-tile I/O is still accessible by defining CPP
586        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
587    o monitor package can write to NetCDF files and/or STDOUT
588    o fix re-definition bug in MNC_GRID_INIT_ALL()
589    o doc/api_reference added
590      - a framework for building an API Reference Manual using all
591        the "protex" comments embedded in the code
592      - see pkg/generic_advdiff, pkg/mnc for examples
593    o MNC:
594      - make myThid the last argument for all subroutines
595      - new default for the grid files: NO halos
596      - add useMNC and other run-time flags
597      - separate per-file-group handling of the unlimited dimension
598      - early initialization of MNC w/ flags read at the eeboot stage
599        and lookup tables set in initialize_fixed
600      - write all MNC output to a freshly-created directory
601    o thermodynamics sea-ice (thsice) is now tested with testreport.
602    o test exp. advect_cs: use the standard cs32 grid ; update output.
603    o Added functionality to grdchk:
604      pick global i,j,k position (or nearest wet) where to perform check.
605    
606    checkpoint52l_post
607    o new land formulation:
608      a) use ground enthalpy as prognostic variable to ensure exact
609         energy conservation.
610      b) account for water temperature and for latent heat of freezing
611         in all processes (rain, run-off, ground storage)
612      c) compute surface and ground temperature implicitly.
613    o aim_v23 modification for new land model:
614      a) Treat separately land / ocean / sea-ice surface fluxes
615         to allow implicit computation of land & sea-ice surface temp.
616      b) add snow precipitation.
617    checkpoint52l_pre
618    
619    o fix problem (when 1 tile is empty) in min/max monitor.
620    o fix bug in timeAve (u,vZetatave in common block)
621    o no restoring terms under ice for pkg/seaice
622    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
623    o bug fix for pkg/seaice pickups
624    o change MNC call locations and add coordinate attributes
625    o mask vorticity at the corner ; affects global_ocean.cs output
626    o fix ini_curvilinear_grid ; test CS experiments with mpi
627    o aim.5l_cs: modify sea-ice fraction input file ; update output
628    o exf: Adding simple range check routine for exf fields after read
629    
630    checkpoint52k_post
631    o removed top-level directory "diags"
632      - we migrated these functions to pkg/timeave a long time ago
633    o fixed bug introduced in pkg/monitor
634    o accuracy ctrlprec = 32 insuffient for gradient checks using
635      averaged fields (I/O via cost_averages)
636      -> use ctrl.h in active_file*.F to control I/O precision.
637    o paramter list of CALL ADTHE_MAIN_LOOP
638    o added initial do_the_model_io to ecco
639    o set all ...Freq to zero after cost_final
640      taveFreq, dumpFreq, pChkptFreq
641    o MAIN and ECCO differentiability restored
642    
643    checkpoint52j_post
644    o fix nchklev in tamc.h for global_ocean...
645    o Bringing flow and store directives up-to-date
646    o Really weird thing!
647      call do_the_model_io from the_main_loop with parameters
648      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
649      TAF places a faulty re-call of initialise_varia
650      after cost_final call which should not be there!
651    checkpoint52j_pre
652    
653    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
654      error messages
655    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
656    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
657      debug output
658    o modfied mdsio_writefield.F to handle non-global files under exch2
659    o update AIM Cubed-Sphere exp (aim.5l_cs):
660      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
661    o update AIM Equatorial Channel exp:
662      use standard aim_v23 pkg and change the SST fields to be more realistic.
663    o globalFile now works with exch2
664    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
665      mon_vort3.F to make exch2 friendly with >1 tile per cube face
666    o limit timeave output for hi-res integrations
667    
668    checkpoint52i_post
669    o removed CPP_EEOPTIONS.h from verification/*/code
670    o updated the tiling for global_ocean_pressure
671    checkpoint52i_pre
672    
673    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
674      the old pkg/aim).
675    
676    checkpoint52h_pre
677    o shortened offending lines in exch2_send_rx?.template
678    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
679    o genmake2: add build & execute test for NetCDF code
680    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
681      old grid files, moved CPP_EEMACROS.h to pkg/exch2
682    o added useSingleCPUIO flag to monitor.F and mon_out.F
683    o added temporary hack for sea-ice dynamics on the cube:
684      metric terms are ignored and it is assumed that
685      there is no sea-ice on cube faces 1, 2, 4, and 5.
686    
687    checkpoint52f_post
688    o added exch2 cube routines to pkg/exch2
689    o modified hs94.cs-32x32x5 to use it
690    o added new grid files to hs94.cs-32x32x5
691    checkpoint52f_pre
692    
693    checkpoint52e_post
694    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
695      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
696    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
697      to work with implicit vertical advection and AB ;
698    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
699    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
700     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
701    checkpoint52e_pre
702    
703    o fix bug in impldiff when Nr=1 or Nr=2.
704    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
705    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
706    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
707      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
708    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
709    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
710    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
711    
712    checkpoint52d_post
713    o re-tiled many expts to allow comparison in multi-processor mode
714      - updated output accordingly
715      - changed hs94.128x64x5 to use intial T from file rather than use the
716        random number generator
717    o add infrastructure in model routines for fizhi and gridalt packages
718    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
719    o changes to permit hi-res, cubed-sphere, configuration
720      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
721      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
722      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
723        of surface winds for the cube
724      (A verification experiment, based on global_ocean.cs32x15, but with
725       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
726       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
727       complete with example surface forcing files and matlab scripts to look
728       at the output and compare it with that of global_ocean.cs32x15.)
729    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
730       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
731       to conform to the common rule.
732    o check-in the first version of the coupler + interfaces for multi-components
733       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
734       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
735       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
736       - ocean and atmos. share the same horizontal grid (no interpolation).
737       - exchanges between component and coupler is done in forward_step
738    o new verification experiment, cpl_aim+ocn:
739       coupled ocean - AIM atmosphere on cs32 grid.
740    
741    checkpoint52d_pre
742    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
743    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
744    
745    checkpoint52c_post
746    o Fixing OPTIONS files for use of exf:
747      - ALLOW_ECCO not needed
748      - ECCO_CPPOPTIONS.h should not be included from
749        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
750        as has been the case in the past
751      - All cal/exf related options are currently set in
752        single header file. Should remain so until we
753        agree on a consistent new policy.
754    o Removed all CPP options for cal package.
755      cal has no more CPP options.
756    o modified STOREs in GAD_ADVECTION
757    o corrected key comp. for passkey
758    
759    checkpoint52b_post
760    o new version: "thsice" of thermodynamic sea-ice pkg:
761     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
762     - modify fluxes but do not change theta directly;
763     - light cleaning of bulk_force pkg (still needed with thsice).
764     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
765       + output_thsice.txt to test thsice & bulk_force pkgs.
766    o put back grid & coriolis monitor output.
767    checkpoint52b_pre
768    
769    o call "do_the_model_io" at the beginning (=> dump initial state)
770    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
771    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
772      (need info on NUMBER_OF_PTRACERS)
773    o missing PTRACERS headers in some routines
774    o default tamc.h in pkg/autodiff supposed to crash
775      to ensure proper customization
776    
777    checkpoint52a_post
778    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
779      - moved surfaceTendencyTice from pkg/seaice to main code
780      - subroutine FREEZE_SURFACE now limits only surface temperature
781        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
782        => new output.txt for global_ocean.cs32x15 & global_with_exf
783      - keep the old version of FREEZE for backward compatibility;
784        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
785      - corresponding modifs for TAF directives
786    o added surface flux output variables to TIMEAVE_STATVARS
787    o time-averaged output for pkg/ptracers
788    o fix problem with ECCO-related divided adjoint
789      snapshot file was missing some ad-variables,
790      but no warning issued by TAF
791    
792    checkpoint52a_pre
793    o some bug fixes for #undef REAL4_IS_SLOW
794    
795    checkpoint52 = ecco_c52_e35
796    o after testing adjoints of checkpoint51u_post
797    
798    checkpoint51u_post
799    o this is the post-merge tag of the ecco-branch
800      (needs another clean checkout and re-testing)
801    o various natl_box_adjoint configs and results
802      but no input fields
803    o obcs adjoint not yet merged!
804    o adding ECCO global 1x1 and 2x2 degree configs
805    o updated/extended some store directives for seaice
806    o pkg/ecco now containes ecco-specific part of cost function
807    o top level routines the_main_loop, forward_step
808      supersede those in model/src/
809      previous input data.cost now in data.ecco
810      (new namelist ecco_cost_nml)
811    o in ctrl/ cleaned some cross-dependencies and updated CPP options
812    
813    checkpoint51t_post
814    o this is the pre-merge tag of the ecco-branch
815    
816    checkpoint51s_post
817    o cleanup: removed various obsolete #define-s
818    o pkg/grdchk
819      - renamed 'ph-grd 3' to 'grad-res'
820      - merged from ecco-branch
821        (remaining bug fixes for obcs gradient checks)
822      - additional high-precision output for testreport
823        (grep for 'precision_grdchk_result')
824    
825    checkpoint51r_post
826    o cleaned up or removed CPP_OPTIONS.h files
827    o updated results for some of the tests to reflect the new
828      optfiles (-ieee: -O0 instead of -O3)
829    
830    checkpoint51q_post
831    o cd_code:
832      - moved cd_scheme.F -> cd_code_scheme.F
833      - separate read_checkpoint from cd_code_ini_vars.F
834      - separated cd_code part from write_checkpoint
835      - updated AD_SOURCE, generated .flow
836      - added CD_CODE_VARS.h to the_main_loop
837      - Moving cd_code specific store dir.s to pkg/cd_code
838    o ctrl package totally restructured
839      - pack/unpack now optional and decoupled from
840        xx_/adxx_ I/O
841      - ctrl_pack/unpack cleaned
842        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
843      - confined inclusion of AD_CONFIG.h to where necessary.
844    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
845    
846    checkpoint51p_post
847    o create initial cd_code package
848      - WARNING: the initialization of fields within packages
849        is broken because INI_FIELDS (where READ_CHECKPOINT is
850        called) is called *before* PACKAGES_INIT_VARIABLES.
851        This seems to be backwards since
852        1) its important to initially zero the entire field including
853           the "halo" region
854        2) zeroing needs to be done *before* reading pickup info
855           and the pickup call might or might not happen in any
856           particular run
857      - this needs an overhaul for R2
858    o cleanup verification/*/code/GMREDI_OPTIONS.h
859    o cleanup testreport
860    
861    checkpoint51o_post
862    o bringing AD-related verif's up to date with genmake2
863      - carbon/
864      - global_ocean.90x40x15/
865      - hs.94.1x64x5/
866      - (front_relax/ )
867    o (more) consistent directory structure for AD-related verif.'s
868    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
869    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
870    o bug fix in find_alpha.F for MDJWF:
871      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
872        change rho -> rho-rhoConst
873      - replace call find_rho to find_rhonum
874    o initialisation of rFlx extended to full array (required by TAF)
875      and shifted to thermodynamics
876    o removed PTRACERS.h in ptracers routine
877    o added surfacetendencyPtr to S/R parameter list pracers_forcing
878    o Correcting initialisations for fVerU, fVerV.
879    o helping TAF to recognize dependency on kUp for
880      fVerU, fVerV
881    o Replacing delZ by delR in pkg/ctrl/
882    checkpoint51o_pre
883    
884    o undid all of cp51 pending some cleanups and discussion
885    o added the [#include "AD_CONFIG.h"] statement to all files that need
886       it for adjoint/tl #defines
887     o re-worked the build logic in genmake2 to support AD_CONFIG.h
888     o removed tools/genmake since it no longer works
889    
890    checkpoint51n_post
891    o modifications to make FREEZE flux visible to pkg/kpp
892      - moved surfaceTendencyTice from pkg/seaice to main code
893      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
894      - subroutine FREEZE now limits only surface temperature
895        (this means new output.txt for global_ocean.90x40x15,
896         global_ocean.cs32x15, and global_with_exf)
897    o added surface flux output variables to TIMEAVE_STATVARS
898    
899    checkpoint51n_pre
900    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
901    o added [#include "AD_CONFIG.h"] to all files that use the following
902      defines:
903      - ALLOW_ADJOINT_RUN
904      - ALLOW_TANGENTLINEAR_RUN
905      - ALLOW_ECCO_OPTIMIZATION
906    
907    checkpoint51m_post
908    o incorporating changes to get TAMC/TAF working in genmake2
909      - added new TAMC/TAF targets to the Makefile
910      - various cleanups related to package handling
911      - these changes should have no impact on the forward model
912    
913    checkpoint51l_post
914    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
915     - faster algorithm for cal_addtime.F
916     - higher precision arithmetic, where needed
917     - pkg/exf *startdate variables changed from calendar date to
918       model integration time
919    
920    checkpoint51l_pre
921    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
922    o enable to apply restoring on S & T only in a latitude band.
923    o update output (external_forcing_surf modif. change truncation errors)
924       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
925    
926    checkpoint51k_post
927    o change default to: useNHMTerms=.FALSE.
928     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
929       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
930     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
931        exp1, ideal_2D_oce
932     - change data file of oceanic exp (leave the results unchanged for now)
933       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
934    o set gravitySign automatically according to the vertical coordinate used
935      (and change sign: back to "logical" value: +1 when R increases downward)
936    o added an include barrier to the default CPP_OPTIONS.h and
937      removed the #include "PACKAGES_CONFIG.h" from it
938    o fix a bug in mom_fluxform (from chk51j_post)
939    
940    checkpoint51j_post
941    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
942    o adjusted some flow directives (dynamics, thermodynamics)
943    o added cubed-sphere case to test cost function
944    o heckpoint_lev?_directives.h now include
945      pkg-specific directives, whenever those are enabled.
946    o Moving pkg-specific flow directives to corresponding pkg
947      Moving pkg-specific differentiation list to corresponding pkg
948      Moving pkg-specific checkpoint-lev storing to corresponding pkg
949      ---> conventions are
950           - pkg_ad.flow
951           - pkg_ad_diff.list
952           - pkg_ad_check_lev?_dir.h
953    
954    checkpoint51i_post
955    o merge of the branch-genmake2
956      - knowingly breaks the older genmake
957      - automatic generation of all ALLOW_${PKG_NAME} defines
958      - new testreport supersedes older testscript
959    o large number of package inclusion and header cleanups
960    checkpoint51i_pre
961    
962    o new output for adjoin of global ocean vector invariant
963    o fix for checkpoint of thermodynamic seaice and bulk_force
964    o Steph gchem various cleanups
965    
966    checkpoint 51h_pre
967    o fixed some single quotes
968    o modify gchem pkg to be more versatile
969    o modifications to clean up dic pkg
970    o add pkg/cfc
971    
972    checkpoint51g_post
973    o provide links for ARPACK and ADM*TLM
974    o start removing verification/vero/
975    o update AD-related stuff
976      (in particular some IF-statements in model/src/ routines)
977    o adding to verification/global_ocean.90x40x15/ adjoint of
978      vector invariant setup
979    
980    checkpoint51f_post
981    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
982    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
983      of tracer Green's fucntions for ocean inversion project.
984    
985    checkpoint51f_pre
986    o Added on-the-fly spatial interpolation capability
987        "USE_EXF_INTERPOLATION" to pkg/exf.
988      - This is a temporary Cartesian-grid hack until
989        the super-duper ESMF coupler becomes available.
990      - See verification/global_with_exf/README for usage example.
991      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
992        flags and modified pkg/seaice accordingly.
993    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
994        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
995        non-local transport term.
996    
997    checkpoint51e_post
998    o pkg/mom_vecinv:
999      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1000      - add time-ave diagnostic of vorticity advection.
1001    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1002    o atmospheric geopotential: - include water vapor effect;
1003                                - use p^kappa in p* scaling.
1004    o land pkg: read initial state from files.
1005    o AIM : add stratospheric drag in the upper level
1006    
1007    checkpoint51d_post
1008    o change function ILNBLNK (=> last non-blank char.) to return zero
1009      (instead of the string length) when the string. char is empty
1010    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1011    o modif's to restore TAMC compatibility
1012      - avoid "_d" constructs in PARAMETER declarations
1013      - avoid interrupting lines by comment lines
1014    o Use cluster local disks for purely local I/O
1015      vs. globally visible disks needed for ctrl stuff
1016      (merged from ecco-branch)
1017      - new active_file_loc... and mdsio_..._loc routines
1018      - affected packages: autodiff, ctrl, grdchk, mdsio
1019    
1020    checkpoint51c_post
1021    o introducing integer flag debugLevel
1022      - debLevZero: suppress all output
1023      - debLevA: standard
1024      - debLevB: equivalent to current debugMode=.TRUE.
1025    o introducing pathname variable mdsioLocalDir for mdsio
1026      that can be specified at runtime
1027      (relevant for cluster I/O to local disk)
1028    `
1029    >>>checkpoint51b_post
1030    adjoint of ptracers
1031    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1032    o extended state in checkpoint_lev?, etc.
1033    o alternative ctrl/cost with tr1 or ptracer
1034    o new comlev1_bibj_ptracers
1035    o new ptracers.flow
1036    o made ptracers_forcing same as external_forcing_s
1037    o added verification for adjoint with ptracers
1038      - adm. grdchk fail so far
1039      - tlm. grdchk OK
1040      - checked tapelev/comlev recomputations: OK
1041    <<<checkpoint51b_pre
1042    
1043    checkpoint51a_post
1044    o added code for biogeochemistry package
1045      - new pkgs: dic, gchem
1046      - new subroutine in ptracers
1047    o modify code for biogeo packages
1048      - in model/src and pkg/ptracers
1049    
1050    checkpoint51
1051    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1052      - autodiff, ctrl, exf, grdchk, seaice
1053      kept separate packages
1054      - cost, ecco, obcs
1055    o updating verification/internal_wave, verification/lab_sea
1056      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1057    
1058    checkpoint50i_post
1059    o Preparing next differentiable checkpoint and sync
1060      of MAIN vs. ecco-branch
1061      - 1st step: this one is differentiable
1062      - 2nd step: next(! not this) checkpoint will have updated packages
1063                  from ecco-branch)
1064    
1065    checkpoint50h_post
1066    o new package "land": provide surface BC for AIM.
1067    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1068    o AIM: use true log-P extrapolation for near surface temp (= as in
1069        F.Molteni paper) ; update aim.5l_cs output.
1070    o New variable in PARM03 for more flexible pickups
1071    o somewhat cleaned package initialisation sequence for
1072      ctrl/ cost/ ecco/ in packages_... routines
1073    
1074    checkpoint50g_post
1075    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1076      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1077      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1078        made the default because of faster convergence than ADI
1079    
1080    checkpoint50f_post
1081    o exf totally restructured
1082      - replaced all exf_set_ routines by one generic exf_set_gen.F
1083        and made sure it's still differentiable
1084      - split exf_getffields.F into new exf_bulkformulae.F
1085      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1086      - updated adjoint/makefile and relevant verif. accordingly
1087    
1088    checkpoint50f_pre
1089     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1090          + change Evap over land. (update aim.5l_cs output)
1091     o added missing .cvsignores and made uniform across expts
1092     o changed configuration of tidal_basin_2d expt
1093     o added pkg/debug functions for tracing code in fatal crashes
1094     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1095     o new fn in pkg/monitor to stop model if solution grows too big
1096     o removed lots of single quotes from comments
1097    
1098    checkpoint50e_post
1099    o make KPP work with PTRACERS
1100     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1101       nearly a copy of kpp_transport_s
1102     - there is no analogue to SurfaceTendencyS, so I have to use
1103       gPtr(of the surface layer) instead
1104    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1105    checkpoint50e_pre
1106    
1107    checkpoint50d_post
1108    o change kpp output from multiple-record state files to single-record state
1109      files analogous to write_state.F
1110    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1111      analogous to the cg2d-related output.
1112    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1113      so that writing to internal file fn (with length 512) fails.
1114    checkpoint50d_pre
1115    
1116    checkpoint50c_post
1117    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1118    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1119    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1120    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1121    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1122    
1123    checkpoint50c_pre
1124    Merging from release1_p13:
1125    o bug fix for pkg/seaice dynamic solver
1126    o Added SEAICE_initialHEFF to pkg/seaice
1127    
1128    checkpoint50b_post
1129    o store u*,v* in gU,V instead of in guNm1,gvNm1
1130    o in order to put the momForcing out of the Adams-Bashforth:
1131      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1132      to timestep.F
1133    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1134    o re-generate output for highly sensitive test-exp:
1135       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1136    
1137    checkpoint50b_pre
1138    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1139    o corrected CPP option mismatch in exf_Bulk... functions for case
1140      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1141    
1142    checkpoint50a_post
1143    o Bug fix for merging between c50 and KPP.
1144      ikey was passed from thermodynamics to kpp_calc via
1145      common block rather than being recomputed in kpp_calc,
1146      in contradiction with new key itdkey.
1147      New key ikppkey created, and tamc.h headers updated.
1148    
1149    checkpoint50
1150    - 2nd step of merge with ecco-branch:
1151      merge changes in ecco-branch back into main trunk
1152    - bug fix in find_alpha
1153    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1154    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1155    - merged some sliced AD support routines
1156    
1157    checkpoint49
1158    merged from ecco-branch:
1159    o exf:
1160      - Enable initialisation of forcing fields to constant
1161        (runtime) values.
1162      - in exf_getffields.F
1163        Reduce i-/j-loop to interior domain, discarding overlaps.
1164        That also fixes wrong TAF-key computations for key_1, key_2
1165        with bulf formulae.
1166      - exf_init.F modify #ifdef for exf_init_evap
1167      - exf_getffieldrec.F, ctrl_getrec.F
1168        The following INT-usages are not safe:
1169          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1170          fldcount = int(fldsecs/fldperiod) + 1
1171        and were modified.
1172    o autodiff: checkpoint_lev...
1173      - updated storing for bulk formulae (some arrays were missing)
1174      - added state for seaice package
1175      - synchronized with main branch
1176    o DIVA:
1177      Modif.s in
1178      - the_main_loop.F
1179      - the_model_main.F
1180      and added cost_final_restore.F cost_final_store.F
1181      o With these changes, it is possible to fully separate
1182        the first forward run to compute the cost function (mdthe_main_loop)
1183        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1184        into separate model executions.
1185        This enables better tuning of DIVA to given queue sizes.
1186      o Loss of cost function value in consecutive DIVA runs is
1187        fixed by storing to 'costfinal' file.
1188      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1189        beginning/end of adjoint integration is accounted for.
1190      The current changes apply to TAF-1.4.26.
1191      TAF has one remaining bug, requiring one manual change
1192      (see MITgcm manual).
1193    o cal: synchronized between MAIN and ecco-branch
1194    
1195    checkpoint48i_post
1196    o Changes to restore differentiability of code w.r.t. previous tag
1197      (mostly adding new routines to make list and replacing
1198      pressure by totPhiHyd).
1199    o Updated and merged grdchk package
1200      - has both ADM and TLM checks
1201      - works for single- and multi-proc.
1202      - output cleaned
1203      - worked successfully for parallel DIVA
1204    o genmake:
1205      - Adding -platform=SP4
1206      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1207    o Modif. for DIVA:
1208      ctrl_unpack should not be called in intermediate DIVA interval.
1209      (similar thing would apply for active files such as
1210      tbar, sbar, psbar, which should not be reinitialised;
1211      only relevant for ecco-branch)
1212    
1213    checkpoint48h_post
1214    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1215    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1216    o Added SEAICE_initialHEFF to pkg/seaice
1217    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1218    
1219    checkpoint48g_post
1220    --- EOS:
1221    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1222      store total Potential in totPhyHyd for diagnostics & EOS.
1223    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1224    --- Pressure/geopotential gradient:
1225    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1226    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1227      ( changes results of global_ocean_pressure )
1228    o NLFS + z-coord.: add eta*Rho' contribution.
1229    o accurate phiHyd when using interface-W at the middle between 2 centers
1230     ( changes results of ideal_2D_oce )
1231    o includes r* 2nd term in potential gradient.
1232    
1233    checkpoint48f_post
1234    Merging from release1_p12:
1235    o Modifications for using pkg/exf with pkg/seaice
1236      - improved description of the various forcing configurations
1237      - added basic radiation bulk formulae to pkg/exf
1238      - units/sign fix for evap computation in exf_getffields.F
1239      - updated verification/global_with_exf/results/output.txt
1240    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1241      (SBO) core products, including oceanic mass, center-of-mass,
1242      angular, and bottom pressure (see pkg/sbo/README.sbo).
1243    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1244      to avoid negative values in shallow regions.
1245      - updated verification/natl_box/results/output.txt
1246      - updated verification/lab_sea/results/output.txt
1247    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1248    o Added useSingleCpuIO option (see PARAMS.h).
1249    o Updated useSingleCpuIO option in mdsio_writefield.F to
1250      work with multi-field files, e.g., for single-file pickup.
1251    o pkg/seaice:
1252      - bug fix in growth.F: QNET for no shortwave case
1253      - added HeffFile for specifying initial sea-ice thickness
1254      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1255    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1256      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1257    o pkg/seaice:
1258      - adjoint-friendly modifications
1259      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1260    
1261    checkpoint48e_post
1262    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1263    o dynamics: change definition of computational domain & adapt mom_fluxform
1264      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1265    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1266        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1267        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1268        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1269        inverted_barometer solid-body.cs-32x32x1
1270      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1271    
1272    checkpoint48d_post
1273    o in preparation for r*:
1274     a) use pre-computed gradient of hydrostatic potential:
1275        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1276     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1277        => affects results of glob_oce_pressure (different truncation error)  
1278      update output.txt of ideal_2D_oce & global_ocean_pressure
1279    
1280    checkpoint48d_pre
1281    o in preparation for r*:
1282      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1283      pass the 2 comp. of the grad. as arguments to momentum S/R.
1284      but for the moment, only used if it does not change the results.
1285    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1286    
1287    checkpoint48c_post
1288    Modifications in treatment of initial flux forcing controls
1289    to avoid extra storing of flux fields.
1290    
1291    checkpoint48c_pre
1292    o Added tidal_basin_2d experiment (currently 1D!)
1293    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1294    
1295    checkpoint48b_post
1296    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1297     (modification to pressure gradient not yet implemented)
1298    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1299      (for U & V) that are used for vertical advection of momentum.
1300    
1301    checkpoint48a_post
1302    o In preparation for r*, use temp. array to compute vertical transport
1303       in flux-form momentum pkg. => change results of few test-exp.
1304      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1305                        lab_sea, natl_box & plume_on_slope
1306    
1307    checkpoint48
1308    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1309    
1310    checkpoint47j_post
1311    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1312    o moved adexch from forward_step to addummy_in_stepping
1313    o added exch in ctrl_map_...
1314    o aveFreq.=0. at end of cost_final to avoid overwrite in
1315      reverse checkpointing loop
1316    o Yet more changes in gmredi:
1317      * adgmredi_calc_tensor
1318        avoiding all recomputation of gmredi_slope_limit
1319      * adgmredi_x/y/rtransport
1320        added flag for excessive storing to avoid recomp. of
1321        u/v/rtans, dTdx/y/z
1322        -> this is not really necessary and very memory-consuming
1323      * adgmredi_slope_psi:
1324        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1325      * gmredi_slope_limit
1326        re-activated full calculation of taperfct for case 'ac02'
1327    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1328    
1329    checkpoint47i_post
1330    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1331    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1332      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1333    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1334    o gmredi: fix few bugs.
1335    
1336    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1337    This will be a good checkpoint to plug into the ecco-branch.
1338    o few modif.'s to get latest version adjointed
1339      (mainly kick out code in ini_linear_phisurf)
1340    o modif's to run adjoint with exactConserv
1341    o case GM_BOLUS_ADVEC should be cleaned
1342      S/R gmredi_slope_psi should be cleaned
1343    o verification/carbon now has exactConserv=.TRUE.
1344    
1345    checkpoint47g_post
1346    o time-average AIM output: becomes independent from statvars time-average
1347      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1348    o After TAF bug fix:
1349      Tested adjoint of gmredi package.
1350      Tests were done with checkpoint47 rather than with latest
1351      checkpoint47f_post since the latter is broken for the adjoint
1352      verification/carbon/ contains both ADM and TLM gradient checks.
1353    Here they are, before they get changed/lost/stolen.
1354    Mostly modif.'s to fix numerical sensitivities.
1355    Gradient checks OK for
1356    - GM_taper_scheme:
1357      * clipping
1358      * ac02
1359      * linear
1360      * glw91
1361      * dm95
1362      * ldd97
1363    - GMREDI_OPTIONS:
1364      * GM_VISBECK_VARIABLE_K
1365      * GM_NON_UNITY_DIAGONAL
1366      * GM_EXTRA_DIAGONAL
1367      * GM_BOLUS_ADVEC
1368    in conjunction with data.gmredi parameters to be checked in
1369    in a few minutes under verification/carbon/code/
1370    
1371    checkpoint47f_post
1372    Merging from release1_p10:
1373    o modifications for using pkg/exf with pkg/seaice
1374      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1375        and SEAICE_EXTERNAL_FLUXES
1376      - pkg/exf CPP options EXF_READ_EVAP and
1377        EXF_NO_BULK_COMPUTATIONS
1378      - usage examples are Experiments 8 and 9 in
1379        verification/lab_sea/README
1380      - verification/lab_sea default experiment now uses
1381        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1382    
1383    checkpoint47e_post
1384    o created a tag prior to creating a branch
1385    
1386    checkpoint47d_post
1387    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1388      at the bottom boundary had an erroneous half slip boundary condition
1389    o added bottom drag and no slip boundary condition capabilities to
1390      oceanic pressure coordinates code
1391    o added new verification experiment global_ocean_pressure, this experiment is
1392      also described in the tutorial section of the manual
1393    checkpoint47d_pre
1394    
1395    checkpoint47c_post
1396    o Added a verification experiment for a global cubed-sphere ocean run
1397      -  verification/global_ocean.cubed32x32x30
1398      -  uses pkg/therm_seaice and pkg/bulk_forcing
1399    
1400    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1401    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1402      when using P-coordinate; only implemented for atmospheric config.
1403    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1404      NOTES: requires option NONLIN_FRSURF to be "#define".
1405    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1406    
1407    checkpoint47b_post
1408    Merging from release1_p9:
1409    o pkg/seaice
1410      - removed GOTO's and added taf directives
1411      - double precision constants to reduce the g77 (Linux)
1412        to F77 (SGI) differences reported in release1_p8
1413    o tools/genmake
1414      - added SGI options
1415    o verification/testscript
1416      - updated to that of checkpoint47a_post
1417    o verification/global_ocean.90x40x15/input/eedata
1418      - modified for SGI f77 compatibility
1419    o verification/lab_sea
1420      - added description of sea-ice model
1421      - added missing matlab routines
1422      - added test of thermodynamics parallelization
1423    
1424    checkpoint47a_post
1425    o new pkg: aim_v23
1426     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1427       for now, keep the same surface forcing as before.
1428     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1429     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1430     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1431    o add diagnostic of surface correction term in monitor output
1432    
1433    o bulk_force and therm_seaice
1434    - Two packages:  bulk_force (Bulk forcing)
1435      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1436    - Earlier integration from Stephaine Dutkiewicz
1437      and Patrick Heimbach.
1438    - Two ifdef statements for compile time,
1439       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1440    
1441    checkpoint47
1442    differentiable version of checkpoint46n_post
1443    o bug fix in quasihydrostaticterms
1444    o * "clean" adjoint code (in terms of extensive recomputations)
1445        can now be obtained for all GMREDI options (i.e. for
1446        - GM_VISBECK_VARIABLE_K
1447        - GM_NON_UNITY_DIAGONAL
1448        - GM_EXTRA_DIAGONAL
1449        - GM_BOLUS_ADVEC )
1450      * However, wrong gradient check problem remains unsolved.
1451      * New CPP options have been introduced for different
1452        tapering schemes
1453    o external_fields_load now part of differentiation list
1454    o pressure needs multiple storing;
1455      would be nice to have store_pressure at beginning or
1456      end of forward_step, e.g. by having phiHyd global (5-dim.)
1457      (NB: pressure is needed for certain cases in find_rho,
1458      which is also invoked through convective_adjustment).
1459    o recomputations in find_rho for cases
1460     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1461    o #define ATMOSPHERIC_LOADING should be differentiable
1462    o ini_forcing shifted to begining of initialise_varia
1463    o Incorporating QNVS line search routines into MITgcm
1464      (this is separate code, and therefore not under pkg)
1465      lsopt/, optim/
1466    o Updated verification/carbon/
1467      - #define GM_VISBECK_VARIABLE_K
1468      - GM_taper_scheme    = 'ldd97'    
1469    
1470    checkpoint46n_post
1471    Merging from release1_p8:
1472    o verification/natl_box:
1473      updating new external_fields_load routine
1474    o New package: pkg/seaice
1475      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1476      The sea-ice code is based on Hibler (1979-1980).
1477      Two sea-ice dynamic solvers, ADI and LSR, are included.
1478      In addition to computing prognostic sea-ice variables and diagnosing
1479      the forcing/external data fields that drive the ocean model,
1480      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1481      The implied surface heat flux is then stored in variable
1482      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1483      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1484      non-local transport term.  Because this call precedes model
1485      thermodynamics, temperature under sea-ice may not be "exactly" at
1486      the freezing point by the time theta is dumped or time-averaged.
1487      N.B.: fairly large differences in accuracy occur across
1488            different platforms/compilers; comparison between
1489            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1490            generated output gives:
1491       T           S           U           V
1492      C D M    c        m  s        m  s        m  s        m  s
1493      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1494      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1495      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1496    
1497      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1498    o GAD:
1499      - generated new common blocks to account for call of
1500        same gad routines with differing traceridentities
1501        (needed to modify tracerIdentity indices in GAD.h)
1502      - generated separate common blocks for case useCubedSphereExchange
1503        (Department of Futurology)
1504      - parameter lists to gmredi_?transport: added tracerIdentity
1505      - added new key indices to tamc.h
1506    o external_fields_load:
1507      - added this routine to TAF list
1508      - needed to make some common blocks global and additional storing
1509        along the same lines as exf package (checkpoint_lev?_directives.h)
1510    o exf:
1511      updated external forcing package
1512      - bug fixes carried over from ecco-branch
1513        (missing OBCS_OPTIONS.h in two routines)
1514      - enable easy to use "no forcing".
1515      - added exf I/O for atmospheric loading
1516      - added exf I/O for runoff data
1517      - transfered scaling between exf <-> MITgcm to exf namelist
1518    o Adding new verification experiment global_with_exf.
1519      This verification experiment is almost identical to the
1520      global_ocean.90x40x15 experiment, except that it uses
1521      the exf (and cal) package instead of the
1522      external_fields_load routine (cf README file).
1523    
1524    checkpoint46m_post
1525    o modified testscript to return -- when there are no lines of "%MON" output
1526    o added new flag "quasiHydrostatic" for QH mode
1527      and new routine quasihydrostaticterms()
1528    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1529      New routine: mom_u_coriolis_nh()
1530    o fixed sign of non-hydrostatic metric terms in u and v equations.
1531      Depend on correct sign of gravitySign.
1532    o added work.pc* to .cvsignore in aim directories using ifc
1533    o introduced flag for controllin non-hydrostatic metric terms
1534    o removed gravitySign from PARM04
1535    o switched to g77/ifc from pgf77 in aim experiments
1536    
1537    checkpoint46l_post
1538    o made convective adjustment work with pressure coordinates:
1539     - changed the direction of k-loop in convective_adjustment.F for the
1540       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1541     - adjusted the reference pressure k-index in convective_adjustment.F
1542     - adjusted the convection condition in convect.F (in analogy to
1543       calc_ivdc.F)
1544     - convective_adjustment no longer computes anything on the halos
1545     - removed the warnings about negative salinity from find_rho.F and
1546       find_alpha.F; instead the new routine look_for_neg_salinity, called
1547       at the beginning of find_rho, find_alpha, and find_beta, does a
1548       check of the entire slice, if CPP-option
1549       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1550    checkpoint46l_pre
1551    
1552    checkpoint46k_post
1553    o fixed the verification/global_ocean.90x40x15 experiment:
1554     - new bathymetry (the world according to A., JMC, and M.)
1555     - new initial fields and forcing fields (*.bin files)
1556     - new POLY3.COEFFS (for the next release one should switch to a full
1557       equation of state: JMD95P or MDJWF)
1558     - fixed several errors and redundancies in the data file
1559     - experiment uses looped cells
1560     - added matlab directory with diagnostic scripts for plotting of output
1561    
1562    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1563     - read AIM physics parameters from a file (data.aimphys)
1564     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1565    
1566    checkpoint46j_post
1567    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1568    o move wVel computation at the end of the time step, in S/R integr_continuity
1569    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1570    o update timeave pkg for wVel diagnostic.
1571    checkpoint46j_pre
1572    
1573    checkpoint46i_post
1574    o Clean up AIM package (and keep the results unchanged):
1575      include CPP_OPTION and use IMPLICT NONE in all routines ;
1576      declare all the variables _RL ; use _d 0 for all numerical constants.
1577      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1578    
1579    checkpoint46h_post
1580    o cleaned up the use of rhoNil and rhoConst.
1581      - rhoNil should only appear in the LINEAR equation of state, everywhere
1582        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1583        and the dynamical equations are all divided by rhoConst
1584    o introduced new parameter rhoConstFresh, a reference density of fresh
1585      water, to remove the fresh water flux's dependence on rhoNil. The default
1586      value is 999.8 kg/m^3
1587    o cleanup up external_forcing.F and external_forcing_surf.F
1588      - can now be used by both OCEANIC and OCEANICP
1589    checkpoint46h_pre
1590    
1591     Added code to convert surface volume flux (fresh water) into
1592     a mass flux when using P coordinates in the ocean (OCEANICP).
1593     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1594    
1595    checkpoint46g_post
1596    o Include a new diagnostic variable phiHydLow for the ocean model
1597      - in z-coordinates, it is the bottom pressure anomaly
1598      - in p-coordinates, it is the sea surface elevation
1599      - in both cases, these variable have global drift, reflecting the mass
1600        drift in z-coordinates and the volume drift in p-coordinates
1601      - included time averaging for phiHydLow, be aware of the drift!
1602    o depth-dependent computation of Bo_surf for pressure coordinates
1603      in the ocean (buoyancyRelation='OCEANICP')
1604      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1605        Theta, Salinity, and Pressure in the parameter list. This routine is
1606        presently contained in find_rho.F. This routine does not give the
1607        correct density for 'POLY3', which would be a z-dependent reference
1608        density.
1609    o cleaned up find_rho
1610      - removed obsolete 'eqn' from the parameter list.
1611    o added two new verification experiments: gop and goz
1612      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1613    checkpoint46g_pre
1614    
1615    checkpoint46f_post
1616    o Enable tangent linear (forward mode) gradient checks:
1617      - extended active file handling to g_... files
1618      - added TANGENT_SIMULATION to theSimulationMode
1619      - extended grdchk package accordingly
1620    o added tangent linear setup in verification/carbon/code_ftl
1621    o added adjoint setup in verification/front_relax/code_ad
1622    
1623    checkpoint46e_post
1624    o Added new equation of state -> MDJWF
1625      - EOS of McDougall et al., 2002, JAOT, submitted
1626      - caveat: the equation of state is only valid for a smaller (more
1627        realistic?) range of values than JMD95P/Z and UNESCO
1628      - added masks to the calculation of pressure in store_pressure
1629      - added more check values for density in check_eos (ini_eos.F), some of
1630        the old check values are out of the range of the MDJWF-eos, so don't
1631        expect perfect matches for those
1632    checkpoint46e_pre
1633    
1634    checkpoint46d_post
1635    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1636      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1637      case of pressure coordinates. eosType='JMD95Z' in
1638      combination with buoyancyRelation='OCEANICP' now causes an error.
1639    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1640      in find_alpha/beta.
1641    checkpoint46d_pre
1642    
1643    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1644      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1645    
1646    checkpoint46c_post
1647    o Changes necessary for ocean in p-coordinates
1648     -  Added new buoyancy relation = 'OCEANICP'
1649     -  Added new parameters = gravitySign (this used to be contained inside
1650        the factor dRdZ which I added when we first switched to R coordinates).
1651     X GM/Redi is not compatible (yet)
1652     X bottom drag and no-slip need to be debugged.
1653    checkpoint46c_pre
1654    
1655    checkpoint46b_post
1656    o Added new equation of state -> JMD95Z and JMD95P
1657      - EOS of Jackett and McDougall, 1995, JAOT
1658      - moved all EOS parameters into EOS.h
1659      - new routines ini_eos.F, store_pressure.F
1660    o Added UNESCO EOS, but not recommended because it requires
1661      in-situ temperature (see JMD95)
1662    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1663      unesco.f to be used with POLY3
1664    checkpoint46b_pre
1665    
1666    checkpoint46a_post
1667    o Added (atmospheric) pressure loading
1668      - new field in FFIELDS.h, etc...
1669      - new cpp flag ATMOSPHERIC_LOADING
1670    o Changed hFacC to _hFacC in calc_phi_hyd.F
1671    o Added SHORTWAVE_HEATING to some files for consistency
1672    checkpoint46a_pre
1673    
1674    checkpoint46
1675    further merges from release1_p5
1676    o new ctrl package
1677      - adopted from ECCO environment to enable optimization
1678      - added Eliassen Palm fluxes to controls
1679    o added Eliassen Palm flux controls to gradient check package
1680    o cost package
1681      - Compatible with new ctrl package
1682      - added Eliassen Palm cost hooks
1683      - modif's of existing cost functions
1684    o Adjoint-related bug fixes in kpp:
1685      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1686      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1687    o autodiff package
1688      - flow directives:
1689        + new for S/R do_the_model_io
1690        + enhanced for S/R checkpoint
1691        + new gmredi.flow
1692      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1693        disable adcommon.h/g_common.h by default.
1694      - fixed problem for adjoint of global_max
1695    o modified verification/carbon/
1696    o New setup for adjoint of global_ocean
1697    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1698    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1699    o incorporated hooks for sponge layer code (external_forcing.F)
1700    
1701    checkpoint45d_post
1702    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1703    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1704      (affects plume_on_slope "cg2d" output)
1705    o add new parameter deltaTfreesurf for free-surface time stepping
1706    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1707    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1708    o change phiMin in exp1 (to agree with documentation)
1709    o add new flags:
1710     - T,S forcing inside/outside Adams-Bashforth
1711     - turn off temp,salt advection and/or forcing
1712     - for each tracer, define internal flag for multiDimAdvection & A-B
1713    o monitor: change definition of KE to check conservation of Energy
1714    
1715    checkpoint45c_post
1716    o Removed f90 comments ("!")
1717    o Modified initialisations to enable exf package for MITgcm
1718      (without invoking ECCO_PACKAGE).
1719    o modifications to gradient check package (Martin Losch)
1720      - enable centered differences
1721      - modified format of standard output
1722    
1723    checkpoint45b_post
1724    o cleaned exchange calls in cg2d
1725    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1726    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1727      to configure barotropic setup (Martin Losch)
1728    o moved some initialisations within bi,bj loop in dynamics
1729      (TAF flow dependency)
1730    o in initialise_varia, moved call packages_init_variables
1731      before convective_adjustment_init
1732      (corresponding adjustment of TAF tape initialisation).
1733    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1734    
1735    checkpoint45a_post
1736    o compute Rho over the whole domain (extend iMin,jMin indices)
1737    o specific exchange for X-slice domain (case Ny=1)
1738    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1739    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1740    
1741    checkpoint44h_post = checkpoint45
1742    o Fix to restore differentiability:
1743      place at which packages_init_variables is called in
1744      initialise_varia is crucial for reverse control flow.
1745    o modifications in GMRedi to enable stable adjoint
1746      (corresponding modif's in thermodynamics, dynamics)
1747    o added missing hook for sponge layer code in external_forcing
1748    o modified test cost functions
1749    o storing in gad_advection (plus removal of write(0,*)!
1750    o missing headers TR1.h added in convective_adjustment routines
1751    o errorMessageUnit set non-equal zero in eeboot
1752      (conflict on some platforms, e.g. IBM SP3)
1753    o modified carbon verif.
1754    
1755    checkpoint44h_pre
1756    o vertical grid option: allow to put the Interface at the middle between
1757      2 cell-centers ; replace delZ in pkg/kpp by drF.
1758    o GM Advective form: Tracers are advected using the residual transport (=
1759      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1760    
1761    checkpoint44g_post
1762    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1763      results) ; ifdef missing in thermodynamics.F
1764    
1765    checkpoint44f_pre,checkpoint44f_post
1766    o added PTRACERS package
1767      This allows an arbitrary number of passive tracers to be integrated
1768      forward simultaneously with the dynamicaly model.
1769      + Implemented so far:
1770        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1771        - I/O and checkpointing
1772        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1773      + Not implemented so far:
1774        - KPP
1775        - OBCS
1776      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1777        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1778        line in data.pkg.
1779      + This package is disabled by default since it increases storage.
1780    
1781    
1782    o testscript: added -cleanup option
1783    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1784                 b) enable to filter 2D fields.
1785    
1786    checkpoint44e_pre,post
1787    o re-wrote convective adjustment to use pre-calculated weights
1788      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1789      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1790      Original calls to convect() still in place.
1791    
1792    chkpt44d_pre,post
1793    o added missing EXCLUDE_MONITOR flags
1794    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1795      (incompatible typ in MIN/MAX expressions caused problems
1796      on IBM SP3)
1797    o in genmake added variable MAKEDEPEND
1798      plus resetting for case SunOS
1799    o added timer_stats.c routine for IBM SP3
1800    o removed variables in dynamics
1801    !!! I forgot to create tag chkpt44d_pre !!!
1802    !!! But chkpt44d_pre = chkpt44c_post    !!!
1803    
1804    o real fresh water flux implemented with non-linear free-surface.
1805    
1806    chkpt44c_pre,post
1807    o few fix (mask in shap_s2, EmPmR in external_field_load,
1808      USE_NATURAL_BCS in solve_for_P);
1809    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1810    
1811    checkpoint44b_pre/_post
1812    o merge of relevant stuff from the ecco-branch:
1813      - genmake: removed $S64 overwrite for case SunOS
1814      - pkg/exf: update and corrections for field swapping and obcs
1815      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1816                  harmonized between ECCO and MITgcm
1817      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1818                      updated checkpointing_lev... lists for obcs
1819      - model/src: minor changes in forward_step, plot_field
1820                   added directive for divided adjoint in the_main_loop
1821      - pkg/mdsio: added mdsio_gl_slice
1822    
1823    o check parameters & config (chkpt44a_pre,post)
1824    o OBC and NonLin_FrSurf.
1825    
1826    checkpoint44
1827    o fix bug in mom_vi_del2uv
1828    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1829    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1830    o update AIM experiments (NCEP input files)
1831    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1832    o added some stuff for AD
1833    
1834    checkpoint43
1835    o added two new advection tests
1836    o added global 4x4 degree ocean test
1837    o added test of H&S94 with free surface on cube
1838    o some final mods for gradient check, adjoint,...
1839    
1840    checkpoint42
1841      Fixed AD-related problems:
1842    o Store directives up-to-date with re-arranged Adams-Bashforth
1843      (mainly thermodynamics.F)
1844    o New store directives for multi-dim. advection schemes
1845      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1846      * new common block and key passkey
1847      (mainly gad_advection.F)
1848    o Modified store directives for split of dynamics/thermodynamics
1849      for the case ALLOW_KPP
1850    o Cleaned argument list for timestep_tracer.F
1851    
1852    checkpoint41
1853    o re-formatted/added comments in prologues of key subroutines
1854      to work with protex
1855    
1856    checkpoint40
1857    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1858    o added FLT (floats) package from Arne along with demo. experiment
1859    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1860      implementation of forward-in-time forcing terms
1861    o more mods for non-linear free-surface including new variable
1862    o modified multi-dim method to work on cube
1863    o bug fix in KPP (from DM)
1864    
1865    checkpoint40pre9
1866    o added DST advection schemes
1867    o fix MPI bug on SGI's
1868    o modifications for non-linear free-surface
1869    o fixed conditionals for fixed flow/passive tracer only mode
1870    o added tension/strain form of stress tensor
1871    o changes to commenting of arguments for TAF/TAMC
1872    o added/updated many matlab scripts
1873    o added multi-dimensional advection method for tracers
1874      
1875    checkpoint40pre8
1876    o new package rw/
1877      Added method for dumping intermediate local arrays:
1878      mdsio_writetile - same as mdsio_writefield except works from inside
1879                        bi,bj loop
1880      mdsio_writelocal - same as mdsio_writetile except works for local
1881                         arrays
1882      write_local_r? - higher-level wrapper for mdsio_writelocal
1883      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1884      Example given at end of mom_vecinv.F that dumps some local arrays.
1885    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1886      control flux-form versus vector invariant code.
1887      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1888      or genmake -DISABLE ...
1889    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1890      (additional storing is now needed for case vecinv;
1891      currently nothing implemented to switch this storing off
1892      in case fluxform is used since no CPP flag available).
1893    
1894    checkpoint40pre7
1895    o bug fix in dynamics.F
1896      calc_viscosity called before k=1,Nr loop.
1897    o added some #ifdef's ALLOW_PASSIVE_TRACER
1898    o cleaned initialisations in ctrl_map_ini
1899      related to TAF
1900    
1901    checkpoint40pre6
1902    o split dynamics into thermodynamics & dynamics
1903    o corresponding split of calc_diffusivity into
1904      calc_diffusivity, calc_viscosity
1905      (kpp_calc_diff, kpp_calc_visc).
1906    o Added diffkr, kapgm to control variables
1907    o bug fix in gmredi_slope_limit for ldd97
1908    
1909    checkpoint40pre5
1910    o proper initialization of Adams-Bashforth time stepping
1911      + uses forward step for very first step of model (iter=0)
1912    o re-generated *all* output since almost all output is modified by this
1913      change (sorry but we've been putting this one off for about 2 years)
1914      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1915        *not* regenerated since they are already out of date and I don't
1916        want to create the impression that they are suddenly working.
1917    o removed KAP stuff for DEC's
1918    o modified/added many .cvsignore files in */code and */input
1919    o added new expt "solid-body.cs-32x32x1"
1920      + this uses an alternative form of ini_curvilinear_grid.F which
1921        is not necessarily any better than the current one...
1922    
1923    checkpoint40pre4
1924    o added re-initialisations of utrans,vtrans,rtrans in
1925      calc_common_factors which are crucial for TAF.
1926    o extended iMin,jMin range for calc_common_factors,
1927      calc_diffusivity
1928    o added option ALLOW_PASSIVE_TRACER
1929    o a few minor updates and fixes
1930    
1931    checkpoint40pre3
1932    o created calc_gtr1.F for gad package
1933    o split the_main_loop and re-introduced forward_step
1934    o some recomputations of nIter0 for TAMC
1935    
1936    checkpoint40pre2
1937    o Updated to latest branch of AJA, JMC
1938    o Added gradient check package
1939    o Added routines for passive tracer handling
1940    o Added carbon sequestration sensitivity experiment
1941    
1942    checkpoint39
1943     o Modifications and fixes to support TAMC
1944       (mainly missing or wrong directives)
1945     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1946       in addummy_in_stepping
1947     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1948     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1949     o Included following packages:
1950       cal: calendar
1951       exf: external forcing
1952       ecco: essential routines to control use of cal, exf
1953             (NB: this is not the full ECCO environment)
1954     o disabled some packages by default in genmake
1955    
1956    checkpoint38
1957     o see notes_c37_adj.txt
1958     o corrected wrong layer index in external_forcing_t
1959     o replaced the_main_loop/forward_step by the_main_loop
1960     o removed forceoutput from write_state
1961       (replaced criteria for initial/final state)
1962     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1963    
1964    checkpoint37
1965     o mdsio.F routine split and packaged in pkg/mdsio
1966       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1967        used unless genmake -disable=mdsio)
1968     o allow a more precise surface-geopotential gradient for the atmosphere
1969       taking into account the change in space of Alpha (=1/rho) at the surface.
1970     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1971       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1972     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1973       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1974       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1975     o Time-Average diagnostics defined as a pseudo package "timeave".
1976     o pickup files : old pickup (before c35) did not work with new code (c35
1977       and after) unless activating 2 commented lines in initialise-varia.
1978     o Non-Hydrostatic pickup file Pb fixed.
1979     o bug with Rigid-lid version (since c35) fixed.  
1980    
1981    checkpoint36
1982     o implement Crank-Nickelson barotropic time-stepping
1983     o recover Time-Average diagnostics
1984     o fix Pb in checkpoint (PR#19)
1985     o AIM become a standard package ; clean unused CPP_kees
1986    
1987    checkpoint35
1988     o subtantial rewrite of dynamics.f
1989     o allows staggered time-stepping
1990     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1991     o added bottom drag (linear + quadratic)
1992    
1993    checkpoint34
1994     o Modified exchange routines for correct reverse simulation.
1995     o Added verification output to comply with bug fix in impldiff.F
1996       as of c33 (exp2, natl_box).
1997     o Corrected store directives in dynamics.F
1998     o Corrected array boundaries in impldiff.F
1999     o Corrected array dimensions in gmredi.
2000       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2001     o Added routine GLOBAL_SUM_INT to global_sum.F
2002     o Added mdsio_gl.F for ECCO purposes.
2003    
2004  checkpoint33  checkpoint33
2005   o Fixed bug in lower BC in impldiff.F   o Fixed bug in lower BC in impldiff.F
2006   o Fixed confusion about units of forcing arrays in FFIELDS.h   o Fixed confusion about units of forcing arrays in FFIELDS.h

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