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revision 1.47 by heimbach, Tue Aug 21 16:38:41 2001 UTC revision 1.461 by heimbach, Mon Feb 28 17:47:35 2005 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint57e_post
7    o Adding eddy stress controls a la Ferreira et al.
8    checkpoint57e_pre
9    
10    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
11      update output.txt of exp. fizhi-gridalt-hs
12    o add more "Z" dimensions and associated coordinate vars to MNC
13    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
14    o parameter calendarDumps: when set, approximate months (30-31 days) and years
15      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
16      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
17      months and years.  Requires pkg/cal.
18    o diagnostics: add pickup functionality
19      - off by default for backwards compatibility
20      - current version only uses MDSIO -- MNC will be added
21    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
22    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
23    
24    checkpoint57d_post
25    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
26    o modify verification/ideal_2D_oce so that it tests the creation of mnc
27      output from the diagnostics package
28    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
29    o make genmake2 more portable by using ".$FS" instead of ".f" for more
30      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
31    o add coordinate variables to the MNC output from the diagnostics package
32    o change MNC-flags default value: true when useMNC=TRUE
33    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
34      the ability (off by default) to read the grid information using MNC
35    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
36    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
37    o do snap-shot diagnostics at the middle of the time-interval (instead of
38      at the end).
39    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
40      new test for AIM with thSIce + slab-ocean
41    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
42    o move state variable diagnostics to the beginning of the time step ;
43      (note: still needs some work specially for snap-shot diagnostics)
44      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
45    
46    checkpoint57c_post
47    o Change testing option (-ieee) to get closer agreement between g77 & ifort
48    o generate new output.txt files on faulks with g77 & the new -ieee option
49    checkpoint57c_pre
50    
51    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
52      update output.txt of exp. global_ocean.90x40x15
53    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
54      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
55    o add saltFlux(+File) forcing capability with periodicExternalForcing
56    o allow to use pkg diagnostics for GM-Redi & ThSIce output
57    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
58    o improvements for the MNC output from DIAGNOSTICS:
59      - correct handling of the unlimitied dimension
60      - all dims now have associated coordinate variables
61      - variables located at U, V, and Corner ("Z") points are now written
62        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
63        *all* data points are output
64    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
65    o added pkg/seaice/seaice_monitor.F
66    o mdsio_readfield.F can now read files visible only to master MPI process.
67    o pkg/seaice: some test code for ice-modified ocean stress
68    o exf_getffields interpolation defaults to bilinear for all scalar forcing
69      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
70      spurious negative numbers for precipitation and humidity.  Will cause
71      some small numerical differences for integrations using pkg/exf/exf_interp.F.
72    o pkg/ctrl/
73      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
74        May be enabled via doPackDiag
75      *  introduce z-scaling of
76         + gradient (doZscalePack) and
77         + control (doZscaleUnpack)
78    o pkg/mdsio/
79      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
80      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
81    
82    checkpoint57b_post
83    o simplify options in diagnostics_fill arguments (remove weird combinations)
84    o fix MNC coordinate variables so that they now contain per-face index
85      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
86      general, EXCH2 grids are only aligned to a "local" coordinate system
87    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
88    o Implement instantaneous output within pkg diagnostics:
89      setting a negative frequency in data.diagnostics produces
90     "snap-shot" output (as opposed to time-average if freq > 0)
91    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
92      NOTE: change ptracer diagnostics name: use 2 characters to work with
93            more than 9 tracers. Add also diagnostics of advect & diffus flux.
94    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
95      becomes the coordinate variable for the 'T' dimension
96    o add CF-style coordinate variables to MNC
97      - just a first cut:  numbers are meaningless on the cubesphere and
98        missing along the T axis but otherwise it works!
99    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
100    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
101    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
102      this is based directly on what the model compute, so that the content of
103      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
104    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
105    o clean up build options files for SunOS, in particular
106      - remove -traditional from xmakedepend
107      - change -xarch=v9 to -xarch=native for f77
108      - restore use of make (not gmake)
109      - add CC=gcc if using g77
110    o changes per discussion of AM, JMC, & EH3 today:
111      - move redundant "grid" variables out of "state" -- in preparation of
112        creating proper CF-style coordinate variables and in recognition
113        that any/all grid variables can be easily copied (eg. w/NCO) from
114        the grid files into any of the other NetCDF files
115      - *always* output grid variables with MDSIO (this will eventually be
116        changed)
117      - output MNC grid file if useMNC is true
118    o every instance of _END_MASTER() has been found and replaced with
119      _END_MASTER( myThid ) in order to satisfy certain picky Sun
120      preprocessors
121    o re-arrange diagnostics pkg initialisation:
122     - allow each package to extend the available diagnostics list
123     - add some checking and fix small problems (multi-threaded, ...)
124     - new S/R diagnostics_fill (replace fill_diagnostics):
125       look through the short list of active diag. (instead of the long list)
126       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
127    
128    checkpoint57a_post
129    o this set of changes restores TAMC compatibility
130      tested for global_ocean.90x40x15 adjoint on trough
131      (what a pain)
132    
133    checkpoint57a_pre
134    o some modifs in tools/build_options for sunos
135    o call ctrl_pack for ctrl at end for optimcycle=0
136    
137    checkpoint57
138    o add horizontal bi-harmonic viscosity for vertical velocity
139      - new parameter viscA4W (defaults to viscA4)
140      - affects only non-hydrostatic code
141      - to be done: no-slip lateral boundary conditions
142    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
143    o implement Implicit Vertical advection for pTracers
144    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
145      (implemented also for implicit vertical diffusion & advection)
146    o OBCS: extend application of tracer open boundary conditions
147      to a strip beyond the boundary of width Olx/Oly
148    o add call monitor to TAF set of required calls (flow directives)
149      and include in natl_box_adjoint
150    o untangle a few ifdefs related to cost, ctrl, autodiff
151      untangel a few ALLOW_ECCO_OPTIMIZATION
152    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
153      (theta2, salt2 in ecco_cost_weights)
154    
155    checkpoint56c_post
156    o OBCS as control variables
157      - update ctrl_ad_diff.list, obcs_ad_diff.list
158      - remove balance of obcs controls from default
159      - fix index bug nobcs in ctrl_init
160      - fix dummy fields filen in ctrl_pack
161      - add dummy weights for obcs
162    o lsopt: comment out fort.94 output
163    o optim:
164      - remove unnecessary header files
165      - adjusted namelists
166      - add xerbla.F to Makefile
167    o exf:
168      - multiple modifications of exf_check_range
169      - unit change in exf_init_runoff from [m/year] to [m/s]
170    o mdsio:
171      - i/o-vector change debugLevel from debLevA to debLevB
172    
173    checkpoint56b_post
174    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
175      is called from DO_THE_MODEL_IO
176      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
177      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
178      - clean up PTRACERS_WRITE_TIMEAVE a little
179    o add another verification experiment that tests both the cfc-pkg and
180      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
181      reactive tendencies treated inline with regular timestepping
182    o testreport previously did a lousy job of comparing small numbers, so
183      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
184      implemented in the little c-progam tmp_cmpnum.c which is embedded in
185      testreport.
186    o ptracers_monitor: bug fix for MPI
187    
188    checkpoint56a_post
189    o GCHEM: finish reorganizating the package
190      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
191        (introduces another 3D-array for each passive tracer, but only if
192        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
193        gchemTendency is not needed because the timestep is done separately)
194      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
195      - GCHEM is now---more or less cleanly---separate from PTRACERS
196      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
197        so clear to me how that should be done in a general way.
198    o CFC: improve formatting of output in CFC_ATMOS
199    o PTRACERS:
200      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
201        that ALL experiments with ptracers enable can be checked. This makes
202        GCHEM_MONITOR obsolete.
203      - include a runtime parameter PTRACERS_monitorFreq that defaults to
204        monitorFreq
205      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
206    o add PTRACERS (PTR0[1-5]) to testreport output
207    o exf_check_range:
208      * default changed to .TRUE.
209      * will check values for niter0 if debLevA, every timestep if debLevB
210      * STOP in exf_check_range if 'out of range'
211      * range chosen generous to allow for potential extema
212      TBD: a version with stricter range
213           permitted range would be runtime parameters
214    o GMredi:
215      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
216      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
217      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
218    o GCHEM:
219      - move call to GCHEM_FORCING_SEP, so that it is now called before
220        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
221      - introduced a useGCHEM runtime flag and applied it everywhere.
222      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
223        this flag is now only visible within GCHEM-pkg routines.
224      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
225        be replaced by a 3D array that is computed before thermodynamics; for
226        this, the tracer ID iTracer had to be included into the parameter list
227        of ptracers_forcing
228      - set up forward_step to call gchem_forcing, that will replace
229        gchem_forcing_int in ptracers_forcing
230      - cleaning up
231    o small cleaning of exch2: remove files that are also in eesupp/src
232    
233    checkpoint56
234    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
235    o mnc: cleanup "full" files--fixes out-of-memory problem
236    o ECCO-GODAE
237      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
238      * fully merged and updated from SIO code
239        windstress sign change affects
240        - exf_inscal_[u/v]stress
241        - sign of xx_tau[u/v] adjustments
242        - signs in cost_scat
243      * ctrl_get_gen: avoid update of tau[u/v] for first few days
244      * natl_box_adjoint updated and compressed
245      * 2-level checkpoint switch added
246        (tested in EXP. 1 of natl_box_adjoint)
247      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
248    o SVD
249      * first complete, non-hacked version for SVD calculations
250      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
251        performed via direct access files admtlm_vector.it????
252        (via ctrl_[un]pack)
253      * optimcycle is used for ARPACK iteration counter
254        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
255      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
256        and add linear transforms where necessary
257      * controls are initial/final SST, SSS (can be extended; need to check
258        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
259    o mdsio: filename info to both stderr, stdout
260    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
261      from sign change
262    
263    checkpoint55j_post
264    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
265      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
266    o add consistent build directories and .cvsignore files to verification
267    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
268    o make all subroutines 30 or less characters in length for certain older
269      compilers to work (a thorough search only turns up two routines in
270      pkg/ptracers)
271    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
272      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
273    
274    checkpoint55i_post
275    o change arrays for total vertical diffusivity (2.D if explicit,
276      3.D if implicit) ; each ptracer uses its own background value.
277    o added mnc/NetCDF output capability to ocn_compon_interf
278      - added bits to verification/cpl_aim+ocn so that it can run on
279        ITRDA and other clusters without the mpirun "-wd" option
280    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
281      configuration
282    o give MNC the ability to create additional files rather than
283      exceeding a specified file size limit "MNC_MAX_FILESIZE"
284      - the default is just less than 2GB which is a practical limit
285        on many systems
286    o Compute the non-local term using either KPP vertical diffusivity (=default)
287       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
288    
289    checkpoint55h_post
290    o add verification test "vermix"
291    o remove all the *_ioinc flags and replace with the single global
292      outputTypesInclusive flag
293    o allow to set a vertical profile of vertical diffusivity for T & S
294    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
295    o useMNC moved from data.mnc to data.pkg
296    
297    checkpoint55g_post
298    o Renaming carbon AD experiments to comply with testreport conventions
299    o Updating adjoint of Held-Suarez hs94.1x64x5
300    o Fixing directives for non-ECCO forward_step, after ECCO directives
301      have been fixed to avoid recomp. of do_oceanic_phys
302      Works well for global_ocean.90x40x15,
303      but recomp. issue remains for carbon
304    o Updating adjoint output for natl_box_adjoint after
305      pkg/ecco has been modified (see taga c55d_post)
306    
307    checkpoint55f_post
308    o rename to timeave_init_fixed
309    
310    checkpoint55e_post
311    o some delicate re-shuffle of store directives to avoid one
312      extra call of do_oceanic_physics
313      affects ecco_the_main_loop.F, do_oceanic_physics.F
314      checkpoint_lev1_directives.h
315    o NB: this may break global_ocean adjoint temporarily,
316      but it is clear how to fix it. Will do later, need this now.
317    
318    checkpoint55d_post
319    o ECCO specific cost function terms (up-to-date with 1x1 runs)
320    o ecco_cost_weights is modified to 1x1 runs
321    o modifs to allow observations to be read in as
322      single file or yearly files
323    o enable to read exf forcing fields as either
324      single file or yearly files (flag useExfYearlyFields)
325    checkpoint55d_pre
326    
327    o switch between 2-level and 3-level checkpointing
328    o add ability of MNC to write local and "partial" (eg. 2D slices where
329      the full 3D field is never actually stored) arrays to NetCDF files
330      with the correct (that is, the complete multi-dimensional) set of
331      array indicies
332      - used in mom_vecinv() to write the diagFreq output
333      - tested (demonstrated) in verification/aim.5l_cs
334    o further mnc-ification
335      - add verification/lab_sea to the list with mnc setups
336      - fix undefined mnc v-names in cd_code
337      - add kpp to mnc output (both snapshot and timeave)
338    o non-hydrostatic code
339      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
340        in calc_gw.F
341      - defaults to viscAh
342      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
343        friction or Leith) in non-hydrostatic mode, as long as there is
344        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
345    o pkg/cost
346      extend simple cost functions to treat time mean quantities
347      (T,U,V) via cost_accumulate_state from cost_tile
348    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
349        be 2 times larger than the minimum size the advection scheme requires.
350        now get a perfect conservation of salt in advect_cs test-exp (updated)
351    o GGL90 (Gaspar's TKE mixed layer)
352      - add horizontal diffusion of TKE, requires exchanges in
353        do_fields_blocking_exchanges, horizontal diffusivity is zero by
354        default. In OPA there is no horizontal diffusion of TKE but the
355        mixing coefficients are computed from a horizontal average of TKE of
356        6 points or so. I think that diffusion has a little more physical
357        justification.
358      - clean up ggl90_calc in the hope of reducing memory usage (this hope
359        was in vain)
360      - mask tke-variable in ggl90_init
361    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
362    o fix biharmonic diffusion on CS-grid.
363    o more obcs stuff
364      - added obcs_external_fields_load as an alternative to the EXF-pkg option
365        for reading boundary values. This routine is called from
366        obcs_prescribe_read
367      - updated obcs_check
368      - changed sponge layer relaxation parameter units for days to seconds
369      - turned off sponge layer by default
370      - changed argument list of OBCS_CALC to myTime+deltaTclock
371      - fixed about 35 bugs in obcs_external_fields_load
372    
373    checkpoint55c_post
374    o obcs stuff
375      - new runtime flags useOBCSprescribe, useOBCSbalance
376      - re-arranged obcs_calc
377      - moved exf_getobcs to obcs_prescibe_read
378        obcs_prescibe_read is called after ORLANSKI stuff
379        and independent of it (executable can contain all).
380      - updated obcs_check
381      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
382        These may be necessary only if tangential velocities are
383        prescribed at OB, not sure, needs testing.
384    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
385      which simplifies the calls and passes the ifc check-bounds test
386    
387    checkpoint55b_post
388    o add a 2D scalar, Z location, exchange_2 routine.
389    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
390      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
391      affects advect_cs results (for the wrong reason): update output.txt
392    o use a more standard discretization for biharmonic viscosity ;
393     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
394      affects results of dome set-up: update output.txt
395    o fix gad_advection.F (CubedSphere part), back to version 1.23
396    o fix bug in mom_vi_del2uv.F (CubedSphere part).
397    
398    checkpoint55a_post
399    o merged code to
400      * prescribe/read time-dependent open boundaries
401        (works in conjunction with exf, cal)
402      * sponge layer code for open boundaries
403      * each boundary N/S/E/W now has its own CPP option
404        (healthy for the adjoint)
405    
406    checkpoint55
407    o up-to-date adjoint of previous breaks
408      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
409      - global_ocean_ebm: adjoint still needs fix (TLM ok)
410      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
411      - carbon: * remove tr1-related adjoint verification
412                * add ptracer as control variable
413    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
414      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
415    
416    checkpoint54f_post
417    o in verification/carbin/ remove experiment related to
418      ALLOW_PASSIVE_TRACER (array tr1 etc)
419      code_ad/ input_ad/ results_ad
420    
421    o add two new packages
422      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
423        + subject to optimization (memory)
424      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
425        + subject to reordering (many GOTOs in the original code)
426        + so far opps is called for every (i,j) point, and then operates in
427          the vertical; one may want to reorder the scheme in order operate in
428          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
429          fields)
430    o overhaul of IO so that we now have flags for MDSIO and/or MNC
431      - all verification tests compile and run with linux_ia32_g77
432      - defaults are compatible with current input files--nothing
433        should change if you were not previously using MNC
434      - MNC output has been added in numerous places (eg. timeave)
435        but there are still a few writes not yet do-able with MNC
436        (this is in progress)
437      - flags now allow for either/or/both use of MDSIO and MNC and
438        documentation will soon follow
439      - numerous small formatting cleanups for ProTeX
440    o add version info (via BUILD_INFO.h) to MNC and stdout
441    
442    checkpoint54e_post
443    o add two new packages
444      - pp81 (Packanowski and Philander, 1981), Richardson number and
445        stratification dependent mixing
446      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
447      - these scheme operate in a similar manner as KPP (without ghat, of
448        course), however there is only one diffusivity that is used for both
449        temperature and salinity (and passive tracers)ç
450    o add offline package
451    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
452      provided by Stephanie Dutkiewicz
453    o genmake2: add ability to search for C compilers and cleanup test output
454      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
455    
456    checkpoint54d_post
457    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
458    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
459      leading to additional shift by 5 days each year of integration
460       (i.e. leading to considerable offset over the years)
461    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
462    o start with no AB and no initial filtering (staggerTimeStep):
463      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
464    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
465      (external loading & cpl import/export stay in forward_step.F)
466    o update coupling interface to work with new staggerTimeStep
467    o change MDSIO ptracers_pickup.
468    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
469    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
470    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
471    
472    checkpoint54c_post
473    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
474      this affects (truncation error) output.txt of test-exp:
475       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
476    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
477    o change Qnet to always be the net heat flux, (+upward).
478      affects (truncation error) output of natl_box exp.: updated
479    o define the max number of passive tracers in PTRACERS_SIZE.h
480    o start to test mnc routinely in exp0
481    o add sea-ice loading (sIceLoad) as a new forcing field.
482    
483    checkpoint54b_post
484    o add testreport "-j JOBS" option for parallel builds (tested and pretty
485       impressive on Altix and Opteron systems)
486    o diagnostics can now write NetCDF files through the mnc package
487    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
488    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
489    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
490      affects (truncation error) output of lab_sea & natl_box exp.: updated
491    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
492    
493    checkpoint54a_post
494    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
495    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
496    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
497    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
498      + internal_wave (shift in writing cg2d_ini_res)
499    checkpoint54a_pre
500    
501    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
502      - modified verification/lab_sea and natl_box_adjoint accordingly
503    
504    checkpoint54
505    checkpoint53g_post
506    o prepare splitting of thermodynamics: store convect.counter in common block
507    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
508      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
509    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
510    o new parameter "nShapS": allow to treat differently S from T (nShapT)
511    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
512    o restore adjointability
513    
514    checkpoint53f_post
515    o modifications that affect AIM experiment results (update output.txt):
516      - no advection of S at top interface Nr (pkg/generic_advdiff)
517      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
518    o AIM pkg:
519      - include stability function into surf.Flux derivative relative to Tsurf
520      - calculate clear-sky radiation & surface temp. change (for diagnostics)
521    
522    checkpoint53e_post
523    o merged cylindrical coord configuration
524    o added rotating_tank experiment
525    checkpoint53e_pre
526    
527    checkpoint53d_post
528    o faulks upgraded: re-generate output.txt that have changed:
529       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
530    o Added Bryan and Lewis, 1979, vertical diffusivity profile
531    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
532    o added Sadourny discretization of Coriolis
533      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
534      - re-enabled use of omega3 (useAbsVorticity)
535    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
536      vector-invariant equations
537      - note: does *NOT* yet use same variable visc. for no-slip BC's.
538    o recoded the lateral boundary conditions for non-hydrostatic w, this time
539      hopefully without new bugs
540      - still to do: biharmonic friction for non-hydrostatic w
541    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
542    o regenerated output for global_ocean_ebm (using -ieee)
543    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
544      of mom_common/
545      - simple re-arrangement of instructions within computing loop
546    checkpoint53d_pre
547    
548    checkpoint53c_post
549    o new version of coupler for AIM+thSIce and Ocean models
550     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
551     - land: change Evaporation of snow
552     - aim with thSIce: fix bug in snow-precip.
553    o changes to calc_gw.F
554     - bug fix for w^2 term near the bottom boundary
555     - (hopefully) improve the lateral slip boundary condtions for use with
556        partial/looped cells
557      - because the bug fix changes two verification experiments anyway (exp5
558        and plume on slope), change the lateral boundary condition from half slip
559        to the value of no_slip_sides
560    o ebm package wasnt quite up to the parallel task. Fixed that.
561    o Adjoint of EBM package + verification
562      * TLM OK
563      * ADM not sufficient accuracy yet (needs further testing)
564    
565    checkpoint53b_post
566    o Commiting new energy balance model to repository
567      * package is pkg/ebm
568      * verif. is verification/global_ocean_ebm
569      * references are in ebm_driver.F
570    C      * X. Wang, P. Stone and J. Marotzke, 1999:
571    C        Global thermohaline circulation. Part I:
572    C        Sensitivity to atmospheric moisture transport.
573    C        J. Climate 12(1), 71-82
574    C      * X. Wang, P. Stone and J. Marotzke, 1999:
575    C        Global thermohaline circulation. Part II:
576    C        Sensitivity with interactive transport.
577    C        J. Climate 12(1), 83-91
578    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
579    C        Destabilization of the thermohaline circulation
580    C        by atmospheric eddy transports.
581    C        J. Climate 7(12), 1870-1882
582    o Will need long integration testing.
583    checkpoint53b_pre
584    
585    o created pkg/mom_common in preparation for variable viscosity code
586    o renamed and split ini_mnc_io
587    o pkg/land: only liquid water can diffuse or run-off
588    o AIM using land: soil wetness availability account for snow
589    o added printMapIncludesZeros to EEPARMS namelist
590    
591    checkpoint53a_post
592    o restore TAMC compatiility for exf_constants.h
593      (no usage of _d in .h)
594    o Additional storing in KPP in an attempt to fix
595      TAMC problem with adjoint of KPP code.
596      (no success...)
597      Identical code works fine with TAF.
598    o Fixed verification/natl_box_adjoint experiments.
599      Initial conditions for Experiments 4 and 5 are now
600      set to "SEAICE_initialHEFF=0", which is more reasonable,
601      and hence gives results closer to that of Experiment 2.
602      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
603    
604    checkpoint53
605    o stable checkpoint with up to date adjoint
606      TLM tests only run for 1st grdchk at the moment. Its unclear if
607      this is a code problem or a problem with resetting code for g_
608      variables that is being autogenerated wrong.
609      Otherwise:
610       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
611       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
612         are both still in chaos following their security messes.
613    
614    checkpoint52n_post
615    o various build (mostly genmake2) changes including:
616      - ability to build/run more easily within Cygwin and MacOS X
617      - more complicated Makefiles with a stronger dependence on Gnu Make
618    o pkg/seaice modifications
619      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
620        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
621        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
622      - changed proxy for geostrophic velocity and updated
623        verification/lab_sea/results/* accordingly
624      - removed ADI dynamic solver from pkg/seaice
625      - replaced all occurrences of 1/CSTICE or 1/CSUICE
626        they caused a segmentation fault under certain circumstances
627      - removed unused field WATR
628    o bug fix in exf-package:
629      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
630         now reflect that.
631    o small fixes in the cal-package:
632      - set reference date to first of January for the 'model'-calendar
633      - failing of cal_CheckDate in cal_FullDate now actually results in a
634        warning
635    o small modifications in exf-package to increase flexibility:
636      - change climtempfreeze from a constant to a runtime parameter that
637        is specified in data.exf_clim (default = -1.9)
638      - introduce runtime parameter windstressmax (default = 2.0) that is
639        specified in data.exf
640    o fix in pkg/thsice:
641      - update Evap (Tsf changes) to be consistent with Latent heat flux
642      - maintain snow precipitation unchanged (even if Tsf >=0).
643     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
644    
645    checkpoint52m_post
646    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
647      this does not change any of the results, because myIter=0 in swfrac always
648      lead to jwtype=2 (the default anyway), but the call makes little sense
649      as a default
650    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
651    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
652      atmospheric model (AIM) to use it ; add a "slab ocean" component.
653    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
654    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
655    o extending useSingleCpuIO option to work with new exch2 I/O format
656      - old-style, missing-tile I/O is still accessible by defining CPP
657        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
658    o monitor package can write to NetCDF files and/or STDOUT
659    o fix re-definition bug in MNC_GRID_INIT_ALL()
660    o doc/api_reference added
661      - a framework for building an API Reference Manual using all
662        the "protex" comments embedded in the code
663      - see pkg/generic_advdiff, pkg/mnc for examples
664    o MNC:
665      - make myThid the last argument for all subroutines
666      - new default for the grid files: NO halos
667      - add useMNC and other run-time flags
668      - separate per-file-group handling of the unlimited dimension
669      - early initialization of MNC w/ flags read at the eeboot stage
670        and lookup tables set in initialize_fixed
671      - write all MNC output to a freshly-created directory
672    o thermodynamics sea-ice (thsice) is now tested with testreport.
673    o test exp. advect_cs: use the standard cs32 grid ; update output.
674    o Added functionality to grdchk:
675      pick global i,j,k position (or nearest wet) where to perform check.
676    
677    checkpoint52l_post
678    o new land formulation:
679      a) use ground enthalpy as prognostic variable to ensure exact
680         energy conservation.
681      b) account for water temperature and for latent heat of freezing
682         in all processes (rain, run-off, ground storage)
683      c) compute surface and ground temperature implicitly.
684    o aim_v23 modification for new land model:
685      a) Treat separately land / ocean / sea-ice surface fluxes
686         to allow implicit computation of land & sea-ice surface temp.
687      b) add snow precipitation.
688    checkpoint52l_pre
689    
690    o fix problem (when 1 tile is empty) in min/max monitor.
691    o fix bug in timeAve (u,vZetatave in common block)
692    o no restoring terms under ice for pkg/seaice
693    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
694    o bug fix for pkg/seaice pickups
695    o change MNC call locations and add coordinate attributes
696    o mask vorticity at the corner ; affects global_ocean.cs output
697    o fix ini_curvilinear_grid ; test CS experiments with mpi
698    o aim.5l_cs: modify sea-ice fraction input file ; update output
699    o exf: Adding simple range check routine for exf fields after read
700    
701    checkpoint52k_post
702    o removed top-level directory "diags"
703      - we migrated these functions to pkg/timeave a long time ago
704    o fixed bug introduced in pkg/monitor
705    o accuracy ctrlprec = 32 insuffient for gradient checks using
706      averaged fields (I/O via cost_averages)
707      -> use ctrl.h in active_file*.F to control I/O precision.
708    o paramter list of CALL ADTHE_MAIN_LOOP
709    o added initial do_the_model_io to ecco
710    o set all ...Freq to zero after cost_final
711      taveFreq, dumpFreq, pChkptFreq
712    o MAIN and ECCO differentiability restored
713    
714    checkpoint52j_post
715    o fix nchklev in tamc.h for global_ocean...
716    o Bringing flow and store directives up-to-date
717    o Really weird thing!
718      call do_the_model_io from the_main_loop with parameters
719      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
720      TAF places a faulty re-call of initialise_varia
721      after cost_final call which should not be there!
722    checkpoint52j_pre
723    
724    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
725      error messages
726    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
727    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
728      debug output
729    o modfied mdsio_writefield.F to handle non-global files under exch2
730    o update AIM Cubed-Sphere exp (aim.5l_cs):
731      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
732    o update AIM Equatorial Channel exp:
733      use standard aim_v23 pkg and change the SST fields to be more realistic.
734    o globalFile now works with exch2
735    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
736      mon_vort3.F to make exch2 friendly with >1 tile per cube face
737    o limit timeave output for hi-res integrations
738    
739    checkpoint52i_post
740    o removed CPP_EEOPTIONS.h from verification/*/code
741    o updated the tiling for global_ocean_pressure
742    checkpoint52i_pre
743    
744    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
745      the old pkg/aim).
746    
747    checkpoint52h_pre
748    o shortened offending lines in exch2_send_rx?.template
749    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
750    o genmake2: add build & execute test for NetCDF code
751    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
752      old grid files, moved CPP_EEMACROS.h to pkg/exch2
753    o added useSingleCPUIO flag to monitor.F and mon_out.F
754    o added temporary hack for sea-ice dynamics on the cube:
755      metric terms are ignored and it is assumed that
756      there is no sea-ice on cube faces 1, 2, 4, and 5.
757    
758    checkpoint52f_post
759    o added exch2 cube routines to pkg/exch2
760    o modified hs94.cs-32x32x5 to use it
761    o added new grid files to hs94.cs-32x32x5
762    checkpoint52f_pre
763    
764    checkpoint52e_post
765    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
766      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
767    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
768      to work with implicit vertical advection and AB ;
769    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
770    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
771     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
772    checkpoint52e_pre
773    
774    o fix bug in impldiff when Nr=1 or Nr=2.
775    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
776    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
777    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
778      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
779    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
780    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
781    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
782    
783    checkpoint52d_post
784    o re-tiled many expts to allow comparison in multi-processor mode
785      - updated output accordingly
786      - changed hs94.128x64x5 to use intial T from file rather than use the
787        random number generator
788    o add infrastructure in model routines for fizhi and gridalt packages
789    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
790    o changes to permit hi-res, cubed-sphere, configuration
791      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
792      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
793      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
794        of surface winds for the cube
795      (A verification experiment, based on global_ocean.cs32x15, but with
796       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
797       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
798       complete with example surface forcing files and matlab scripts to look
799       at the output and compare it with that of global_ocean.cs32x15.)
800    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
801       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
802       to conform to the common rule.
803    o check-in the first version of the coupler + interfaces for multi-components
804       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
805       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
806       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
807       - ocean and atmos. share the same horizontal grid (no interpolation).
808       - exchanges between component and coupler is done in forward_step
809    o new verification experiment, cpl_aim+ocn:
810       coupled ocean - AIM atmosphere on cs32 grid.
811    
812    checkpoint52d_pre
813    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
814    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
815    
816    checkpoint52c_post
817    o Fixing OPTIONS files for use of exf:
818      - ALLOW_ECCO not needed
819      - ECCO_CPPOPTIONS.h should not be included from
820        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
821        as has been the case in the past
822      - All cal/exf related options are currently set in
823        single header file. Should remain so until we
824        agree on a consistent new policy.
825    o Removed all CPP options for cal package.
826      cal has no more CPP options.
827    o modified STOREs in GAD_ADVECTION
828    o corrected key comp. for passkey
829    
830    checkpoint52b_post
831    o new version: "thsice" of thermodynamic sea-ice pkg:
832     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
833     - modify fluxes but do not change theta directly;
834     - light cleaning of bulk_force pkg (still needed with thsice).
835     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
836       + output_thsice.txt to test thsice & bulk_force pkgs.
837    o put back grid & coriolis monitor output.
838    checkpoint52b_pre
839    
840    o call "do_the_model_io" at the beginning (=> dump initial state)
841    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
842    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
843      (need info on NUMBER_OF_PTRACERS)
844    o missing PTRACERS headers in some routines
845    o default tamc.h in pkg/autodiff supposed to crash
846      to ensure proper customization
847    
848    checkpoint52a_post
849    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
850      - moved surfaceTendencyTice from pkg/seaice to main code
851      - subroutine FREEZE_SURFACE now limits only surface temperature
852        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
853        => new output.txt for global_ocean.cs32x15 & global_with_exf
854      - keep the old version of FREEZE for backward compatibility;
855        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
856      - corresponding modifs for TAF directives
857    o added surface flux output variables to TIMEAVE_STATVARS
858    o time-averaged output for pkg/ptracers
859    o fix problem with ECCO-related divided adjoint
860      snapshot file was missing some ad-variables,
861      but no warning issued by TAF
862    
863    checkpoint52a_pre
864    o some bug fixes for #undef REAL4_IS_SLOW
865    
866    checkpoint52 = ecco_c52_e35
867    o after testing adjoints of checkpoint51u_post
868    
869    checkpoint51u_post
870    o this is the post-merge tag of the ecco-branch
871      (needs another clean checkout and re-testing)
872    o various natl_box_adjoint configs and results
873      but no input fields
874    o obcs adjoint not yet merged!
875    o adding ECCO global 1x1 and 2x2 degree configs
876    o updated/extended some store directives for seaice
877    o pkg/ecco now containes ecco-specific part of cost function
878    o top level routines the_main_loop, forward_step
879      supersede those in model/src/
880      previous input data.cost now in data.ecco
881      (new namelist ecco_cost_nml)
882    o in ctrl/ cleaned some cross-dependencies and updated CPP options
883    
884    checkpoint51t_post
885    o this is the pre-merge tag of the ecco-branch
886    
887    checkpoint51s_post
888    o cleanup: removed various obsolete #define-s
889    o pkg/grdchk
890      - renamed 'ph-grd 3' to 'grad-res'
891      - merged from ecco-branch
892        (remaining bug fixes for obcs gradient checks)
893      - additional high-precision output for testreport
894        (grep for 'precision_grdchk_result')
895    
896    checkpoint51r_post
897    o cleaned up or removed CPP_OPTIONS.h files
898    o updated results for some of the tests to reflect the new
899      optfiles (-ieee: -O0 instead of -O3)
900    
901    checkpoint51q_post
902    o cd_code:
903      - moved cd_scheme.F -> cd_code_scheme.F
904      - separate read_checkpoint from cd_code_ini_vars.F
905      - separated cd_code part from write_checkpoint
906      - updated AD_SOURCE, generated .flow
907      - added CD_CODE_VARS.h to the_main_loop
908      - Moving cd_code specific store dir.s to pkg/cd_code
909    o ctrl package totally restructured
910      - pack/unpack now optional and decoupled from
911        xx_/adxx_ I/O
912      - ctrl_pack/unpack cleaned
913        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
914      - confined inclusion of AD_CONFIG.h to where necessary.
915    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
916    
917    checkpoint51p_post
918    o create initial cd_code package
919      - WARNING: the initialization of fields within packages
920        is broken because INI_FIELDS (where READ_CHECKPOINT is
921        called) is called *before* PACKAGES_INIT_VARIABLES.
922        This seems to be backwards since
923        1) its important to initially zero the entire field including
924           the "halo" region
925        2) zeroing needs to be done *before* reading pickup info
926           and the pickup call might or might not happen in any
927           particular run
928      - this needs an overhaul for R2
929    o cleanup verification/*/code/GMREDI_OPTIONS.h
930    o cleanup testreport
931    
932    checkpoint51o_post
933    o bringing AD-related verif's up to date with genmake2
934      - carbon/
935      - global_ocean.90x40x15/
936      - hs.94.1x64x5/
937      - (front_relax/ )
938    o (more) consistent directory structure for AD-related verif.'s
939    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
940    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
941    o bug fix in find_alpha.F for MDJWF:
942      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
943        change rho -> rho-rhoConst
944      - replace call find_rho to find_rhonum
945    o initialisation of rFlx extended to full array (required by TAF)
946      and shifted to thermodynamics
947    o removed PTRACERS.h in ptracers routine
948    o added surfacetendencyPtr to S/R parameter list pracers_forcing
949    o Correcting initialisations for fVerU, fVerV.
950    o helping TAF to recognize dependency on kUp for
951      fVerU, fVerV
952    o Replacing delZ by delR in pkg/ctrl/
953    checkpoint51o_pre
954    
955    o undid all of cp51 pending some cleanups and discussion
956    o added the [#include "AD_CONFIG.h"] statement to all files that need
957       it for adjoint/tl #defines
958     o re-worked the build logic in genmake2 to support AD_CONFIG.h
959     o removed tools/genmake since it no longer works
960    
961    checkpoint51n_post
962    o modifications to make FREEZE flux visible to pkg/kpp
963      - moved surfaceTendencyTice from pkg/seaice to main code
964      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
965      - subroutine FREEZE now limits only surface temperature
966        (this means new output.txt for global_ocean.90x40x15,
967         global_ocean.cs32x15, and global_with_exf)
968    o added surface flux output variables to TIMEAVE_STATVARS
969    
970    checkpoint51n_pre
971    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
972    o added [#include "AD_CONFIG.h"] to all files that use the following
973      defines:
974      - ALLOW_ADJOINT_RUN
975      - ALLOW_TANGENTLINEAR_RUN
976      - ALLOW_ECCO_OPTIMIZATION
977    
978    checkpoint51m_post
979    o incorporating changes to get TAMC/TAF working in genmake2
980      - added new TAMC/TAF targets to the Makefile
981      - various cleanups related to package handling
982      - these changes should have no impact on the forward model
983    
984    checkpoint51l_post
985    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
986     - faster algorithm for cal_addtime.F
987     - higher precision arithmetic, where needed
988     - pkg/exf *startdate variables changed from calendar date to
989       model integration time
990    
991    checkpoint51l_pre
992    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
993    o enable to apply restoring on S & T only in a latitude band.
994    o update output (external_forcing_surf modif. change truncation errors)
995       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
996    
997    checkpoint51k_post
998    o change default to: useNHMTerms=.FALSE.
999     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1000       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1001     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1002        exp1, ideal_2D_oce
1003     - change data file of oceanic exp (leave the results unchanged for now)
1004       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1005    o set gravitySign automatically according to the vertical coordinate used
1006      (and change sign: back to "logical" value: +1 when R increases downward)
1007    o added an include barrier to the default CPP_OPTIONS.h and
1008      removed the #include "PACKAGES_CONFIG.h" from it
1009    o fix a bug in mom_fluxform (from chk51j_post)
1010    
1011    checkpoint51j_post
1012    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1013    o adjusted some flow directives (dynamics, thermodynamics)
1014    o added cubed-sphere case to test cost function
1015    o heckpoint_lev?_directives.h now include
1016      pkg-specific directives, whenever those are enabled.
1017    o Moving pkg-specific flow directives to corresponding pkg
1018      Moving pkg-specific differentiation list to corresponding pkg
1019      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1020      ---> conventions are
1021           - pkg_ad.flow
1022           - pkg_ad_diff.list
1023           - pkg_ad_check_lev?_dir.h
1024    
1025    checkpoint51i_post
1026    o merge of the branch-genmake2
1027      - knowingly breaks the older genmake
1028      - automatic generation of all ALLOW_${PKG_NAME} defines
1029      - new testreport supersedes older testscript
1030    o large number of package inclusion and header cleanups
1031    checkpoint51i_pre
1032    
1033    o new output for adjoin of global ocean vector invariant
1034    o fix for checkpoint of thermodynamic seaice and bulk_force
1035    o Steph gchem various cleanups
1036    
1037    checkpoint 51h_pre
1038    o fixed some single quotes
1039    o modify gchem pkg to be more versatile
1040    o modifications to clean up dic pkg
1041    o add pkg/cfc
1042    
1043    checkpoint51g_post
1044    o provide links for ARPACK and ADM*TLM
1045    o start removing verification/vero/
1046    o update AD-related stuff
1047      (in particular some IF-statements in model/src/ routines)
1048    o adding to verification/global_ocean.90x40x15/ adjoint of
1049      vector invariant setup
1050    
1051    checkpoint51f_post
1052    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1053    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1054      of tracer Green's fucntions for ocean inversion project.
1055    
1056    checkpoint51f_pre
1057    o Added on-the-fly spatial interpolation capability
1058        "USE_EXF_INTERPOLATION" to pkg/exf.
1059      - This is a temporary Cartesian-grid hack until
1060        the super-duper ESMF coupler becomes available.
1061      - See verification/global_with_exf/README for usage example.
1062      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1063        flags and modified pkg/seaice accordingly.
1064    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1065        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1066        non-local transport term.
1067    
1068    checkpoint51e_post
1069    o pkg/mom_vecinv:
1070      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1071      - add time-ave diagnostic of vorticity advection.
1072    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1073    o atmospheric geopotential: - include water vapor effect;
1074                                - use p^kappa in p* scaling.
1075    o land pkg: read initial state from files.
1076    o AIM : add stratospheric drag in the upper level
1077    
1078    checkpoint51d_post
1079    o change function ILNBLNK (=> last non-blank char.) to return zero
1080      (instead of the string length) when the string. char is empty
1081    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1082    o modif's to restore TAMC compatibility
1083      - avoid "_d" constructs in PARAMETER declarations
1084      - avoid interrupting lines by comment lines
1085    o Use cluster local disks for purely local I/O
1086      vs. globally visible disks needed for ctrl stuff
1087      (merged from ecco-branch)
1088      - new active_file_loc... and mdsio_..._loc routines
1089      - affected packages: autodiff, ctrl, grdchk, mdsio
1090    
1091    checkpoint51c_post
1092    o introducing integer flag debugLevel
1093      - debLevZero: suppress all output
1094      - debLevA: standard
1095      - debLevB: equivalent to current debugMode=.TRUE.
1096    o introducing pathname variable mdsioLocalDir for mdsio
1097      that can be specified at runtime
1098      (relevant for cluster I/O to local disk)
1099    `
1100    >>>checkpoint51b_post
1101    adjoint of ptracers
1102    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1103    o extended state in checkpoint_lev?, etc.
1104    o alternative ctrl/cost with tr1 or ptracer
1105    o new comlev1_bibj_ptracers
1106    o new ptracers.flow
1107    o made ptracers_forcing same as external_forcing_s
1108    o added verification for adjoint with ptracers
1109      - adm. grdchk fail so far
1110      - tlm. grdchk OK
1111      - checked tapelev/comlev recomputations: OK
1112    <<<checkpoint51b_pre
1113    
1114    checkpoint51a_post
1115    o added code for biogeochemistry package
1116      - new pkgs: dic, gchem
1117      - new subroutine in ptracers
1118    o modify code for biogeo packages
1119      - in model/src and pkg/ptracers
1120    
1121    checkpoint51
1122    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1123      - autodiff, ctrl, exf, grdchk, seaice
1124      kept separate packages
1125      - cost, ecco, obcs
1126    o updating verification/internal_wave, verification/lab_sea
1127      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1128    
1129    checkpoint50i_post
1130    o Preparing next differentiable checkpoint and sync
1131      of MAIN vs. ecco-branch
1132      - 1st step: this one is differentiable
1133      - 2nd step: next(! not this) checkpoint will have updated packages
1134                  from ecco-branch)
1135    
1136    checkpoint50h_post
1137    o new package "land": provide surface BC for AIM.
1138    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1139    o AIM: use true log-P extrapolation for near surface temp (= as in
1140        F.Molteni paper) ; update aim.5l_cs output.
1141    o New variable in PARM03 for more flexible pickups
1142    o somewhat cleaned package initialisation sequence for
1143      ctrl/ cost/ ecco/ in packages_... routines
1144    
1145    checkpoint50g_post
1146    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1147      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1148      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1149        made the default because of faster convergence than ADI
1150    
1151    checkpoint50f_post
1152    o exf totally restructured
1153      - replaced all exf_set_ routines by one generic exf_set_gen.F
1154        and made sure it's still differentiable
1155      - split exf_getffields.F into new exf_bulkformulae.F
1156      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1157      - updated adjoint/makefile and relevant verif. accordingly
1158    
1159    checkpoint50f_pre
1160     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1161          + change Evap over land. (update aim.5l_cs output)
1162     o added missing .cvsignores and made uniform across expts
1163     o changed configuration of tidal_basin_2d expt
1164     o added pkg/debug functions for tracing code in fatal crashes
1165     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1166     o new fn in pkg/monitor to stop model if solution grows too big
1167     o removed lots of single quotes from comments
1168    
1169    checkpoint50e_post
1170    o make KPP work with PTRACERS
1171     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1172       nearly a copy of kpp_transport_s
1173     - there is no analogue to SurfaceTendencyS, so I have to use
1174       gPtr(of the surface layer) instead
1175    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1176    checkpoint50e_pre
1177    
1178    checkpoint50d_post
1179    o change kpp output from multiple-record state files to single-record state
1180      files analogous to write_state.F
1181    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1182      analogous to the cg2d-related output.
1183    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1184      so that writing to internal file fn (with length 512) fails.
1185    checkpoint50d_pre
1186    
1187    checkpoint50c_post
1188    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1189    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1190    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1191    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1192    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1193    
1194    checkpoint50c_pre
1195    Merging from release1_p13:
1196    o bug fix for pkg/seaice dynamic solver
1197    o Added SEAICE_initialHEFF to pkg/seaice
1198    
1199    checkpoint50b_post
1200    o store u*,v* in gU,V instead of in guNm1,gvNm1
1201    o in order to put the momForcing out of the Adams-Bashforth:
1202      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1203      to timestep.F
1204    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1205    o re-generate output for highly sensitive test-exp:
1206       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1207    
1208    checkpoint50b_pre
1209    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1210    o corrected CPP option mismatch in exf_Bulk... functions for case
1211      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1212    
1213    checkpoint50a_post
1214    o Bug fix for merging between c50 and KPP.
1215      ikey was passed from thermodynamics to kpp_calc via
1216      common block rather than being recomputed in kpp_calc,
1217      in contradiction with new key itdkey.
1218      New key ikppkey created, and tamc.h headers updated.
1219    
1220    checkpoint50
1221    - 2nd step of merge with ecco-branch:
1222      merge changes in ecco-branch back into main trunk
1223    - bug fix in find_alpha
1224    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1225    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1226    - merged some sliced AD support routines
1227    
1228    checkpoint49
1229    merged from ecco-branch:
1230    o exf:
1231      - Enable initialisation of forcing fields to constant
1232        (runtime) values.
1233      - in exf_getffields.F
1234        Reduce i-/j-loop to interior domain, discarding overlaps.
1235        That also fixes wrong TAF-key computations for key_1, key_2
1236        with bulf formulae.
1237      - exf_init.F modify #ifdef for exf_init_evap
1238      - exf_getffieldrec.F, ctrl_getrec.F
1239        The following INT-usages are not safe:
1240          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1241          fldcount = int(fldsecs/fldperiod) + 1
1242        and were modified.
1243    o autodiff: checkpoint_lev...
1244      - updated storing for bulk formulae (some arrays were missing)
1245      - added state for seaice package
1246      - synchronized with main branch
1247    o DIVA:
1248      Modif.s in
1249      - the_main_loop.F
1250      - the_model_main.F
1251      and added cost_final_restore.F cost_final_store.F
1252      o With these changes, it is possible to fully separate
1253        the first forward run to compute the cost function (mdthe_main_loop)
1254        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1255        into separate model executions.
1256        This enables better tuning of DIVA to given queue sizes.
1257      o Loss of cost function value in consecutive DIVA runs is
1258        fixed by storing to 'costfinal' file.
1259      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1260        beginning/end of adjoint integration is accounted for.
1261      The current changes apply to TAF-1.4.26.
1262      TAF has one remaining bug, requiring one manual change
1263      (see MITgcm manual).
1264    o cal: synchronized between MAIN and ecco-branch
1265    
1266    checkpoint48i_post
1267    o Changes to restore differentiability of code w.r.t. previous tag
1268      (mostly adding new routines to make list and replacing
1269      pressure by totPhiHyd).
1270    o Updated and merged grdchk package
1271      - has both ADM and TLM checks
1272      - works for single- and multi-proc.
1273      - output cleaned
1274      - worked successfully for parallel DIVA
1275    o genmake:
1276      - Adding -platform=SP4
1277      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1278    o Modif. for DIVA:
1279      ctrl_unpack should not be called in intermediate DIVA interval.
1280      (similar thing would apply for active files such as
1281      tbar, sbar, psbar, which should not be reinitialised;
1282      only relevant for ecco-branch)
1283    
1284    checkpoint48h_post
1285    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1286    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1287    o Added SEAICE_initialHEFF to pkg/seaice
1288    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1289    
1290    checkpoint48g_post
1291    --- EOS:
1292    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1293      store total Potential in totPhyHyd for diagnostics & EOS.
1294    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1295    --- Pressure/geopotential gradient:
1296    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1297    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1298      ( changes results of global_ocean_pressure )
1299    o NLFS + z-coord.: add eta*Rho' contribution.
1300    o accurate phiHyd when using interface-W at the middle between 2 centers
1301     ( changes results of ideal_2D_oce )
1302    o includes r* 2nd term in potential gradient.
1303    
1304    checkpoint48f_post
1305    Merging from release1_p12:
1306    o Modifications for using pkg/exf with pkg/seaice
1307      - improved description of the various forcing configurations
1308      - added basic radiation bulk formulae to pkg/exf
1309      - units/sign fix for evap computation in exf_getffields.F
1310      - updated verification/global_with_exf/results/output.txt
1311    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1312      (SBO) core products, including oceanic mass, center-of-mass,
1313      angular, and bottom pressure (see pkg/sbo/README.sbo).
1314    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1315      to avoid negative values in shallow regions.
1316      - updated verification/natl_box/results/output.txt
1317      - updated verification/lab_sea/results/output.txt
1318    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1319    o Added useSingleCpuIO option (see PARAMS.h).
1320    o Updated useSingleCpuIO option in mdsio_writefield.F to
1321      work with multi-field files, e.g., for single-file pickup.
1322    o pkg/seaice:
1323      - bug fix in growth.F: QNET for no shortwave case
1324      - added HeffFile for specifying initial sea-ice thickness
1325      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1326    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1327      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1328    o pkg/seaice:
1329      - adjoint-friendly modifications
1330      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1331    
1332    checkpoint48e_post
1333    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1334    o dynamics: change definition of computational domain & adapt mom_fluxform
1335      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1336    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1337        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1338        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1339        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1340        inverted_barometer solid-body.cs-32x32x1
1341      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1342    
1343    checkpoint48d_post
1344    o in preparation for r*:
1345     a) use pre-computed gradient of hydrostatic potential:
1346        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1347     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1348        => affects results of glob_oce_pressure (different truncation error)  
1349      update output.txt of ideal_2D_oce & global_ocean_pressure
1350    
1351    checkpoint48d_pre
1352    o in preparation for r*:
1353      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1354      pass the 2 comp. of the grad. as arguments to momentum S/R.
1355      but for the moment, only used if it does not change the results.
1356    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1357    
1358    checkpoint48c_post
1359    Modifications in treatment of initial flux forcing controls
1360    to avoid extra storing of flux fields.
1361    
1362    checkpoint48c_pre
1363    o Added tidal_basin_2d experiment (currently 1D!)
1364    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1365    
1366    checkpoint48b_post
1367    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1368     (modification to pressure gradient not yet implemented)
1369    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1370      (for U & V) that are used for vertical advection of momentum.
1371    
1372    checkpoint48a_post
1373    o In preparation for r*, use temp. array to compute vertical transport
1374       in flux-form momentum pkg. => change results of few test-exp.
1375      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1376                        lab_sea, natl_box & plume_on_slope
1377    
1378    checkpoint48
1379    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1380    
1381    checkpoint47j_post
1382    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1383    o moved adexch from forward_step to addummy_in_stepping
1384    o added exch in ctrl_map_...
1385    o aveFreq.=0. at end of cost_final to avoid overwrite in
1386      reverse checkpointing loop
1387    o Yet more changes in gmredi:
1388      * adgmredi_calc_tensor
1389        avoiding all recomputation of gmredi_slope_limit
1390      * adgmredi_x/y/rtransport
1391        added flag for excessive storing to avoid recomp. of
1392        u/v/rtans, dTdx/y/z
1393        -> this is not really necessary and very memory-consuming
1394      * adgmredi_slope_psi:
1395        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1396      * gmredi_slope_limit
1397        re-activated full calculation of taperfct for case 'ac02'
1398    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1399    
1400    checkpoint47i_post
1401    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1402    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1403      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1404    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1405    o gmredi: fix few bugs.
1406    
1407    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1408    This will be a good checkpoint to plug into the ecco-branch.
1409    o few modif.'s to get latest version adjointed
1410      (mainly kick out code in ini_linear_phisurf)
1411    o modif's to run adjoint with exactConserv
1412    o case GM_BOLUS_ADVEC should be cleaned
1413      S/R gmredi_slope_psi should be cleaned
1414    o verification/carbon now has exactConserv=.TRUE.
1415    
1416    checkpoint47g_post
1417    o time-average AIM output: becomes independent from statvars time-average
1418      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1419    o After TAF bug fix:
1420      Tested adjoint of gmredi package.
1421      Tests were done with checkpoint47 rather than with latest
1422      checkpoint47f_post since the latter is broken for the adjoint
1423      verification/carbon/ contains both ADM and TLM gradient checks.
1424    Here they are, before they get changed/lost/stolen.
1425    Mostly modif.'s to fix numerical sensitivities.
1426    Gradient checks OK for
1427    - GM_taper_scheme:
1428      * clipping
1429      * ac02
1430      * linear
1431      * glw91
1432      * dm95
1433      * ldd97
1434    - GMREDI_OPTIONS:
1435      * GM_VISBECK_VARIABLE_K
1436      * GM_NON_UNITY_DIAGONAL
1437      * GM_EXTRA_DIAGONAL
1438      * GM_BOLUS_ADVEC
1439    in conjunction with data.gmredi parameters to be checked in
1440    in a few minutes under verification/carbon/code/
1441    
1442    checkpoint47f_post
1443    Merging from release1_p10:
1444    o modifications for using pkg/exf with pkg/seaice
1445      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1446        and SEAICE_EXTERNAL_FLUXES
1447      - pkg/exf CPP options EXF_READ_EVAP and
1448        EXF_NO_BULK_COMPUTATIONS
1449      - usage examples are Experiments 8 and 9 in
1450        verification/lab_sea/README
1451      - verification/lab_sea default experiment now uses
1452        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1453    
1454    checkpoint47e_post
1455    o created a tag prior to creating a branch
1456    
1457    checkpoint47d_post
1458    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1459      at the bottom boundary had an erroneous half slip boundary condition
1460    o added bottom drag and no slip boundary condition capabilities to
1461      oceanic pressure coordinates code
1462    o added new verification experiment global_ocean_pressure, this experiment is
1463      also described in the tutorial section of the manual
1464    checkpoint47d_pre
1465    
1466    checkpoint47c_post
1467    o Added a verification experiment for a global cubed-sphere ocean run
1468      -  verification/global_ocean.cubed32x32x30
1469      -  uses pkg/therm_seaice and pkg/bulk_forcing
1470    
1471    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1472    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1473      when using P-coordinate; only implemented for atmospheric config.
1474    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1475      NOTES: requires option NONLIN_FRSURF to be "#define".
1476    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1477    
1478    checkpoint47b_post
1479    Merging from release1_p9:
1480    o pkg/seaice
1481      - removed GOTO's and added taf directives
1482      - double precision constants to reduce the g77 (Linux)
1483        to F77 (SGI) differences reported in release1_p8
1484    o tools/genmake
1485      - added SGI options
1486    o verification/testscript
1487      - updated to that of checkpoint47a_post
1488    o verification/global_ocean.90x40x15/input/eedata
1489      - modified for SGI f77 compatibility
1490    o verification/lab_sea
1491      - added description of sea-ice model
1492      - added missing matlab routines
1493      - added test of thermodynamics parallelization
1494    
1495    checkpoint47a_post
1496    o new pkg: aim_v23
1497     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1498       for now, keep the same surface forcing as before.
1499     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1500     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1501     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1502    o add diagnostic of surface correction term in monitor output
1503    
1504    o bulk_force and therm_seaice
1505    - Two packages:  bulk_force (Bulk forcing)
1506      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1507    - Earlier integration from Stephaine Dutkiewicz
1508      and Patrick Heimbach.
1509    - Two ifdef statements for compile time,
1510       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1511    
1512    checkpoint47
1513    differentiable version of checkpoint46n_post
1514    o bug fix in quasihydrostaticterms
1515    o * "clean" adjoint code (in terms of extensive recomputations)
1516        can now be obtained for all GMREDI options (i.e. for
1517        - GM_VISBECK_VARIABLE_K
1518        - GM_NON_UNITY_DIAGONAL
1519        - GM_EXTRA_DIAGONAL
1520        - GM_BOLUS_ADVEC )
1521      * However, wrong gradient check problem remains unsolved.
1522      * New CPP options have been introduced for different
1523        tapering schemes
1524    o external_fields_load now part of differentiation list
1525    o pressure needs multiple storing;
1526      would be nice to have store_pressure at beginning or
1527      end of forward_step, e.g. by having phiHyd global (5-dim.)
1528      (NB: pressure is needed for certain cases in find_rho,
1529      which is also invoked through convective_adjustment).
1530    o recomputations in find_rho for cases
1531     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1532    o #define ATMOSPHERIC_LOADING should be differentiable
1533    o ini_forcing shifted to begining of initialise_varia
1534    o Incorporating QNVS line search routines into MITgcm
1535      (this is separate code, and therefore not under pkg)
1536      lsopt/, optim/
1537    o Updated verification/carbon/
1538      - #define GM_VISBECK_VARIABLE_K
1539      - GM_taper_scheme    = 'ldd97'    
1540    
1541    checkpoint46n_post
1542    Merging from release1_p8:
1543    o verification/natl_box:
1544      updating new external_fields_load routine
1545    o New package: pkg/seaice
1546      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1547      The sea-ice code is based on Hibler (1979-1980).
1548      Two sea-ice dynamic solvers, ADI and LSR, are included.
1549      In addition to computing prognostic sea-ice variables and diagnosing
1550      the forcing/external data fields that drive the ocean model,
1551      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1552      The implied surface heat flux is then stored in variable
1553      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1554      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1555      non-local transport term.  Because this call precedes model
1556      thermodynamics, temperature under sea-ice may not be "exactly" at
1557      the freezing point by the time theta is dumped or time-averaged.
1558      N.B.: fairly large differences in accuracy occur across
1559            different platforms/compilers; comparison between
1560            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1561            generated output gives:
1562       T           S           U           V
1563      C D M    c        m  s        m  s        m  s        m  s
1564      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1565      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1566      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1567    
1568      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1569    o GAD:
1570      - generated new common blocks to account for call of
1571        same gad routines with differing traceridentities
1572        (needed to modify tracerIdentity indices in GAD.h)
1573      - generated separate common blocks for case useCubedSphereExchange
1574        (Department of Futurology)
1575      - parameter lists to gmredi_?transport: added tracerIdentity
1576      - added new key indices to tamc.h
1577    o external_fields_load:
1578      - added this routine to TAF list
1579      - needed to make some common blocks global and additional storing
1580        along the same lines as exf package (checkpoint_lev?_directives.h)
1581    o exf:
1582      updated external forcing package
1583      - bug fixes carried over from ecco-branch
1584        (missing OBCS_OPTIONS.h in two routines)
1585      - enable easy to use "no forcing".
1586      - added exf I/O for atmospheric loading
1587      - added exf I/O for runoff data
1588      - transfered scaling between exf <-> MITgcm to exf namelist
1589    o Adding new verification experiment global_with_exf.
1590      This verification experiment is almost identical to the
1591      global_ocean.90x40x15 experiment, except that it uses
1592      the exf (and cal) package instead of the
1593      external_fields_load routine (cf README file).
1594    
1595    checkpoint46m_post
1596    o modified testscript to return -- when there are no lines of "%MON" output
1597    o added new flag "quasiHydrostatic" for QH mode
1598      and new routine quasihydrostaticterms()
1599    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1600      New routine: mom_u_coriolis_nh()
1601    o fixed sign of non-hydrostatic metric terms in u and v equations.
1602      Depend on correct sign of gravitySign.
1603    o added work.pc* to .cvsignore in aim directories using ifc
1604    o introduced flag for controllin non-hydrostatic metric terms
1605    o removed gravitySign from PARM04
1606    o switched to g77/ifc from pgf77 in aim experiments
1607    
1608    checkpoint46l_post
1609    o made convective adjustment work with pressure coordinates:
1610     - changed the direction of k-loop in convective_adjustment.F for the
1611       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1612     - adjusted the reference pressure k-index in convective_adjustment.F
1613     - adjusted the convection condition in convect.F (in analogy to
1614       calc_ivdc.F)
1615     - convective_adjustment no longer computes anything on the halos
1616     - removed the warnings about negative salinity from find_rho.F and
1617       find_alpha.F; instead the new routine look_for_neg_salinity, called
1618       at the beginning of find_rho, find_alpha, and find_beta, does a
1619       check of the entire slice, if CPP-option
1620       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1621    checkpoint46l_pre
1622    
1623    checkpoint46k_post
1624    o fixed the verification/global_ocean.90x40x15 experiment:
1625     - new bathymetry (the world according to A., JMC, and M.)
1626     - new initial fields and forcing fields (*.bin files)
1627     - new POLY3.COEFFS (for the next release one should switch to a full
1628       equation of state: JMD95P or MDJWF)
1629     - fixed several errors and redundancies in the data file
1630     - experiment uses looped cells
1631     - added matlab directory with diagnostic scripts for plotting of output
1632    
1633    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1634     - read AIM physics parameters from a file (data.aimphys)
1635     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1636    
1637    checkpoint46j_post
1638    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1639    o move wVel computation at the end of the time step, in S/R integr_continuity
1640    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1641    o update timeave pkg for wVel diagnostic.
1642    checkpoint46j_pre
1643    
1644    checkpoint46i_post
1645    o Clean up AIM package (and keep the results unchanged):
1646      include CPP_OPTION and use IMPLICT NONE in all routines ;
1647      declare all the variables _RL ; use _d 0 for all numerical constants.
1648      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1649    
1650    checkpoint46h_post
1651    o cleaned up the use of rhoNil and rhoConst.
1652      - rhoNil should only appear in the LINEAR equation of state, everywhere
1653        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1654        and the dynamical equations are all divided by rhoConst
1655    o introduced new parameter rhoConstFresh, a reference density of fresh
1656      water, to remove the fresh water flux's dependence on rhoNil. The default
1657      value is 999.8 kg/m^3
1658    o cleanup up external_forcing.F and external_forcing_surf.F
1659      - can now be used by both OCEANIC and OCEANICP
1660    checkpoint46h_pre
1661    
1662     Added code to convert surface volume flux (fresh water) into
1663     a mass flux when using P coordinates in the ocean (OCEANICP).
1664     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1665    
1666    checkpoint46g_post
1667    o Include a new diagnostic variable phiHydLow for the ocean model
1668      - in z-coordinates, it is the bottom pressure anomaly
1669      - in p-coordinates, it is the sea surface elevation
1670      - in both cases, these variable have global drift, reflecting the mass
1671        drift in z-coordinates and the volume drift in p-coordinates
1672      - included time averaging for phiHydLow, be aware of the drift!
1673    o depth-dependent computation of Bo_surf for pressure coordinates
1674      in the ocean (buoyancyRelation='OCEANICP')
1675      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1676        Theta, Salinity, and Pressure in the parameter list. This routine is
1677        presently contained in find_rho.F. This routine does not give the
1678        correct density for 'POLY3', which would be a z-dependent reference
1679        density.
1680    o cleaned up find_rho
1681      - removed obsolete 'eqn' from the parameter list.
1682    o added two new verification experiments: gop and goz
1683      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1684    checkpoint46g_pre
1685    
1686    checkpoint46f_post
1687    o Enable tangent linear (forward mode) gradient checks:
1688      - extended active file handling to g_... files
1689      - added TANGENT_SIMULATION to theSimulationMode
1690      - extended grdchk package accordingly
1691    o added tangent linear setup in verification/carbon/code_ftl
1692    o added adjoint setup in verification/front_relax/code_ad
1693    
1694    checkpoint46e_post
1695    o Added new equation of state -> MDJWF
1696      - EOS of McDougall et al., 2002, JAOT, submitted
1697      - caveat: the equation of state is only valid for a smaller (more
1698        realistic?) range of values than JMD95P/Z and UNESCO
1699      - added masks to the calculation of pressure in store_pressure
1700      - added more check values for density in check_eos (ini_eos.F), some of
1701        the old check values are out of the range of the MDJWF-eos, so don't
1702        expect perfect matches for those
1703    checkpoint46e_pre
1704    
1705    checkpoint46d_post
1706    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1707      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1708      case of pressure coordinates. eosType='JMD95Z' in
1709      combination with buoyancyRelation='OCEANICP' now causes an error.
1710    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1711      in find_alpha/beta.
1712    checkpoint46d_pre
1713    
1714    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1715      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1716    
1717    checkpoint46c_post
1718    o Changes necessary for ocean in p-coordinates
1719     -  Added new buoyancy relation = 'OCEANICP'
1720     -  Added new parameters = gravitySign (this used to be contained inside
1721        the factor dRdZ which I added when we first switched to R coordinates).
1722     X GM/Redi is not compatible (yet)
1723     X bottom drag and no-slip need to be debugged.
1724    checkpoint46c_pre
1725    
1726    checkpoint46b_post
1727    o Added new equation of state -> JMD95Z and JMD95P
1728      - EOS of Jackett and McDougall, 1995, JAOT
1729      - moved all EOS parameters into EOS.h
1730      - new routines ini_eos.F, store_pressure.F
1731    o Added UNESCO EOS, but not recommended because it requires
1732      in-situ temperature (see JMD95)
1733    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1734      unesco.f to be used with POLY3
1735    checkpoint46b_pre
1736    
1737    checkpoint46a_post
1738    o Added (atmospheric) pressure loading
1739      - new field in FFIELDS.h, etc...
1740      - new cpp flag ATMOSPHERIC_LOADING
1741    o Changed hFacC to _hFacC in calc_phi_hyd.F
1742    o Added SHORTWAVE_HEATING to some files for consistency
1743    checkpoint46a_pre
1744    
1745    checkpoint46
1746    further merges from release1_p5
1747    o new ctrl package
1748      - adopted from ECCO environment to enable optimization
1749      - added Eliassen Palm fluxes to controls
1750    o added Eliassen Palm flux controls to gradient check package
1751    o cost package
1752      - Compatible with new ctrl package
1753      - added Eliassen Palm cost hooks
1754      - modif's of existing cost functions
1755    o Adjoint-related bug fixes in kpp:
1756      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1757      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1758    o autodiff package
1759      - flow directives:
1760        + new for S/R do_the_model_io
1761        + enhanced for S/R checkpoint
1762        + new gmredi.flow
1763      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1764        disable adcommon.h/g_common.h by default.
1765      - fixed problem for adjoint of global_max
1766    o modified verification/carbon/
1767    o New setup for adjoint of global_ocean
1768    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1769    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1770    o incorporated hooks for sponge layer code (external_forcing.F)
1771    
1772    checkpoint45d_post
1773    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1774    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1775      (affects plume_on_slope "cg2d" output)
1776    o add new parameter deltaTfreesurf for free-surface time stepping
1777    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1778    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1779    o change phiMin in exp1 (to agree with documentation)
1780    o add new flags:
1781     - T,S forcing inside/outside Adams-Bashforth
1782     - turn off temp,salt advection and/or forcing
1783     - for each tracer, define internal flag for multiDimAdvection & A-B
1784    o monitor: change definition of KE to check conservation of Energy
1785    
1786    checkpoint45c_post
1787    o Removed f90 comments ("!")
1788    o Modified initialisations to enable exf package for MITgcm
1789      (without invoking ECCO_PACKAGE).
1790    o modifications to gradient check package (Martin Losch)
1791      - enable centered differences
1792      - modified format of standard output
1793    
1794    checkpoint45b_post
1795    o cleaned exchange calls in cg2d
1796    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1797    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1798      to configure barotropic setup (Martin Losch)
1799    o moved some initialisations within bi,bj loop in dynamics
1800      (TAF flow dependency)
1801    o in initialise_varia, moved call packages_init_variables
1802      before convective_adjustment_init
1803      (corresponding adjustment of TAF tape initialisation).
1804    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1805    
1806    checkpoint45a_post
1807    o compute Rho over the whole domain (extend iMin,jMin indices)
1808    o specific exchange for X-slice domain (case Ny=1)
1809    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1810    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1811    
1812    checkpoint44h_post = checkpoint45
1813    o Fix to restore differentiability:
1814      place at which packages_init_variables is called in
1815      initialise_varia is crucial for reverse control flow.
1816    o modifications in GMRedi to enable stable adjoint
1817      (corresponding modif's in thermodynamics, dynamics)
1818    o added missing hook for sponge layer code in external_forcing
1819    o modified test cost functions
1820    o storing in gad_advection (plus removal of write(0,*)!
1821    o missing headers TR1.h added in convective_adjustment routines
1822    o errorMessageUnit set non-equal zero in eeboot
1823      (conflict on some platforms, e.g. IBM SP3)
1824    o modified carbon verif.
1825    
1826    checkpoint44h_pre
1827    o vertical grid option: allow to put the Interface at the middle between
1828      2 cell-centers ; replace delZ in pkg/kpp by drF.
1829    o GM Advective form: Tracers are advected using the residual transport (=
1830      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1831    
1832    checkpoint44g_post
1833    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1834      results) ; ifdef missing in thermodynamics.F
1835    
1836    checkpoint44f_pre,checkpoint44f_post
1837    o added PTRACERS package
1838      This allows an arbitrary number of passive tracers to be integrated
1839      forward simultaneously with the dynamicaly model.
1840      + Implemented so far:
1841        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1842        - I/O and checkpointing
1843        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1844      + Not implemented so far:
1845        - KPP
1846        - OBCS
1847      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1848        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1849        line in data.pkg.
1850      + This package is disabled by default since it increases storage.
1851    
1852    
1853    o testscript: added -cleanup option
1854    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1855                 b) enable to filter 2D fields.
1856    
1857    checkpoint44e_pre,post
1858    o re-wrote convective adjustment to use pre-calculated weights
1859      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1860      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1861      Original calls to convect() still in place.
1862    
1863    chkpt44d_pre,post
1864    o added missing EXCLUDE_MONITOR flags
1865    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1866      (incompatible typ in MIN/MAX expressions caused problems
1867      on IBM SP3)
1868    o in genmake added variable MAKEDEPEND
1869      plus resetting for case SunOS
1870    o added timer_stats.c routine for IBM SP3
1871    o removed variables in dynamics
1872    !!! I forgot to create tag chkpt44d_pre !!!
1873    !!! But chkpt44d_pre = chkpt44c_post    !!!
1874    
1875    o real fresh water flux implemented with non-linear free-surface.
1876    
1877    chkpt44c_pre,post
1878    o few fix (mask in shap_s2, EmPmR in external_field_load,
1879      USE_NATURAL_BCS in solve_for_P);
1880    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1881    
1882    checkpoint44b_pre/_post
1883    o merge of relevant stuff from the ecco-branch:
1884      - genmake: removed $S64 overwrite for case SunOS
1885      - pkg/exf: update and corrections for field swapping and obcs
1886      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1887                  harmonized between ECCO and MITgcm
1888      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1889                      updated checkpointing_lev... lists for obcs
1890      - model/src: minor changes in forward_step, plot_field
1891                   added directive for divided adjoint in the_main_loop
1892      - pkg/mdsio: added mdsio_gl_slice
1893    
1894    o check parameters & config (chkpt44a_pre,post)
1895    o OBC and NonLin_FrSurf.
1896    
1897    checkpoint44
1898    o fix bug in mom_vi_del2uv
1899    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1900    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1901    o update AIM experiments (NCEP input files)
1902    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1903    o added some stuff for AD
1904    
1905    checkpoint43
1906    o added two new advection tests
1907    o added global 4x4 degree ocean test
1908    o added test of H&S94 with free surface on cube
1909    o some final mods for gradient check, adjoint,...
1910    
1911    checkpoint42
1912      Fixed AD-related problems:
1913    o Store directives up-to-date with re-arranged Adams-Bashforth
1914      (mainly thermodynamics.F)
1915    o New store directives for multi-dim. advection schemes
1916      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1917      * new common block and key passkey
1918      (mainly gad_advection.F)
1919    o Modified store directives for split of dynamics/thermodynamics
1920      for the case ALLOW_KPP
1921    o Cleaned argument list for timestep_tracer.F
1922    
1923    checkpoint41
1924    o re-formatted/added comments in prologues of key subroutines
1925      to work with protex
1926    
1927  checkpoint40  checkpoint40
1928  o all changes of checkpoint40pre?  o moved calc_gs, calc_gt and calc_tr1 back to model/src
1929    o added FLT (floats) package from Arne along with demo. experiment
1930    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1931      implementation of forward-in-time forcing terms
1932    o more mods for non-linear free-surface including new variable
1933    o modified multi-dim method to work on cube
1934    o bug fix in KPP (from DM)
1935    
1936    checkpoint40pre9
1937    o added DST advection schemes
1938    o fix MPI bug on SGI's
1939    o modifications for non-linear free-surface
1940    o fixed conditionals for fixed flow/passive tracer only mode
1941    o added tension/strain form of stress tensor
1942    o changes to commenting of arguments for TAF/TAMC
1943    o added/updated many matlab scripts
1944    o added multi-dimensional advection method for tracers
1945      
1946    checkpoint40pre8
1947  o new package rw/  o new package rw/
1948    Added method for dumping intermediate local arrays:    Added method for dumping intermediate local arrays:
1949    mdsio_writetile - same as mdsio_writefield except works from inside    mdsio_writetile - same as mdsio_writefield except works from inside

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