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revision 1.34 by heimbach, Tue Jan 30 20:51:26 2001 UTC revision 1.441 by jmc, Wed Feb 2 20:20:09 2005 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
7      new test for AIM with thSIce + slab-ocean
8    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
9    o move state variable diagnostics to the beginning of the time step ;
10      (note: still needs some work specially for snap-shot diagnostics)
11      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
12    
13    checkpoint57c_post
14    o Change testing option (-ieee) to get closer agreement between g77 & ifort
15    o generate new output.txt files on faulks with g77 & the new -ieee option
16    checkpoint57c_pre
17    
18    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
19      update output.txt of exp. global_ocean.90x40x15
20    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
21      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
22    o add saltFlux(+File) forcing capability with periodicExternalForcing
23    o allow to use pkg diagnostics for GM-Redi & ThSIce output
24    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
25    o improvements for the MNC output from DIAGNOSTICS:
26      - correct handling of the unlimitied dimension
27      - all dims now have associated coordinate variables
28      - variables located at U, V, and Corner ("Z") points are now written
29        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
30        *all* data points are output
31    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
32    o added pkg/seaice/seaice_monitor.F
33    o mdsio_readfield.F can now read files visible only to master MPI process.
34    o pkg/seaice: some test code for ice-modified ocean stress
35    o exf_getffields interpolation defaults to bilinear for all scalar forcing
36      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
37      spurious negative numbers for precipitation and humidity.  Will cause
38      some small numerical differences for integrations using pkg/exf/exf_interp.F.
39    o pkg/ctrl/
40      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
41        May be enabled via doPackDiag
42      *  introduce z-scaling of
43         + gradient (doZscalePack) and
44         + control (doZscaleUnpack)
45    o pkg/mdsio/
46      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
47      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
48    
49    checkpoint57b_post
50    o simplify options in diagnostics_fill arguments (remove weird combinations)
51    o fix MNC coordinate variables so that they now contain per-face index
52      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
53      general, EXCH2 grids are only aligned to a "local" coordinate system
54    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
55    o Implement instantaneous output within pkg diagnostics:
56      setting a negative frequency in data.diagnostics produces
57     "snap-shot" output (as opposed to time-average if freq > 0)
58    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
59      NOTE: change ptracer diagnostics name: use 2 characters to work with
60            more than 9 tracers. Add also diagnostics of advect & diffus flux.
61    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
62      becomes the coordinate variable for the 'T' dimension
63    o add CF-style coordinate variables to MNC
64      - just a first cut:  numbers are meaningless on the cubesphere and
65        missing along the T axis but otherwise it works!
66    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
67    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
68    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
69      this is based directly on what the model compute, so that the content of
70      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
71    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
72    o clean up build options files for SunOS, in particular
73      - remove -traditional from xmakedepend
74      - change -xarch=v9 to -xarch=native for f77
75      - restore use of make (not gmake)
76      - add CC=gcc if using g77
77    o changes per discussion of AM, JMC, & EH3 today:
78      - move redundant "grid" variables out of "state" -- in preparation of
79        creating proper CF-style coordinate variables and in recognition
80        that any/all grid variables can be easily copied (eg. w/NCO) from
81        the grid files into any of the other NetCDF files
82      - *always* output grid variables with MDSIO (this will eventually be
83        changed)
84      - output MNC grid file if useMNC is true
85    o every instance of _END_MASTER() has been found and replaced with
86      _END_MASTER( myThid ) in order to satisfy certain picky Sun
87      preprocessors
88    o re-arrange diagnostics pkg initialisation:
89     - allow each package to extend the available diagnostics list
90     - add some checking and fix small problems (multi-threaded, ...)
91     - new S/R diagnostics_fill (replace fill_diagnostics):
92       look through the short list of active diag. (instead of the long list)
93       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
94    
95    checkpoint57a_post
96    o this set of changes restores TAMC compatibility
97      tested for global_ocean.90x40x15 adjoint on trough
98      (what a pain)
99    
100    checkpoint57a_pre
101    o some modifs in tools/build_options for sunos
102    o call ctrl_pack for ctrl at end for optimcycle=0
103    
104    checkpoint57
105    o add horizontal bi-harmonic viscosity for vertical velocity
106      - new parameter viscA4W (defaults to viscA4)
107      - affects only non-hydrostatic code
108      - to be done: no-slip lateral boundary conditions
109    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
110    o implement Implicit Vertical advection for pTracers
111    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
112      (implemented also for implicit vertical diffusion & advection)
113    o OBCS: extend application of tracer open boundary conditions
114      to a strip beyond the boundary of width Olx/Oly
115    o add call monitor to TAF set of required calls (flow directives)
116      and include in natl_box_adjoint
117    o untangle a few ifdefs related to cost, ctrl, autodiff
118      untangel a few ALLOW_ECCO_OPTIMIZATION
119    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
120      (theta2, salt2 in ecco_cost_weights)
121    
122    checkpoint56c_post
123    o OBCS as control variables
124      - update ctrl_ad_diff.list, obcs_ad_diff.list
125      - remove balance of obcs controls from default
126      - fix index bug nobcs in ctrl_init
127      - fix dummy fields filen in ctrl_pack
128      - add dummy weights for obcs
129    o lsopt: comment out fort.94 output
130    o optim:
131      - remove unnecessary header files
132      - adjusted namelists
133      - add xerbla.F to Makefile
134    o exf:
135      - multiple modifications of exf_check_range
136      - unit change in exf_init_runoff from [m/year] to [m/s]
137    o mdsio:
138      - i/o-vector change debugLevel from debLevA to debLevB
139    
140    checkpoint56b_post
141    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
142      is called from DO_THE_MODEL_IO
143      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
144      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
145      - clean up PTRACERS_WRITE_TIMEAVE a little
146    o add another verification experiment that tests both the cfc-pkg and
147      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
148      reactive tendencies treated inline with regular timestepping
149    o testreport previously did a lousy job of comparing small numbers, so
150      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
151      implemented in the little c-progam tmp_cmpnum.c which is embedded in
152      testreport.
153    o ptracers_monitor: bug fix for MPI
154    
155    checkpoint56a_post
156    o GCHEM: finish reorganizating the package
157      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
158        (introduces another 3D-array for each passive tracer, but only if
159        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
160        gchemTendency is not needed because the timestep is done separately)
161      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
162      - GCHEM is now---more or less cleanly---separate from PTRACERS
163      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
164        so clear to me how that should be done in a general way.
165    o CFC: improve formatting of output in CFC_ATMOS
166    o PTRACERS:
167      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
168        that ALL experiments with ptracers enable can be checked. This makes
169        GCHEM_MONITOR obsolete.
170      - include a runtime parameter PTRACERS_monitorFreq that defaults to
171        monitorFreq
172      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
173    o add PTRACERS (PTR0[1-5]) to testreport output
174    o exf_check_range:
175      * default changed to .TRUE.
176      * will check values for niter0 if debLevA, every timestep if debLevB
177      * STOP in exf_check_range if 'out of range'
178      * range chosen generous to allow for potential extema
179      TBD: a version with stricter range
180           permitted range would be runtime parameters
181    o GMredi:
182      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
183      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
184      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
185    o GCHEM:
186      - move call to GCHEM_FORCING_SEP, so that it is now called before
187        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
188      - introduced a useGCHEM runtime flag and applied it everywhere.
189      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
190        this flag is now only visible within GCHEM-pkg routines.
191      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
192        be replaced by a 3D array that is computed before thermodynamics; for
193        this, the tracer ID iTracer had to be included into the parameter list
194        of ptracers_forcing
195      - set up forward_step to call gchem_forcing, that will replace
196        gchem_forcing_int in ptracers_forcing
197      - cleaning up
198    o small cleaning of exch2: remove files that are also in eesupp/src
199    
200    checkpoint56
201    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
202    o mnc: cleanup "full" files--fixes out-of-memory problem
203    o ECCO-GODAE
204      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
205      * fully merged and updated from SIO code
206        windstress sign change affects
207        - exf_inscal_[u/v]stress
208        - sign of xx_tau[u/v] adjustments
209        - signs in cost_scat
210      * ctrl_get_gen: avoid update of tau[u/v] for first few days
211      * natl_box_adjoint updated and compressed
212      * 2-level checkpoint switch added
213        (tested in EXP. 1 of natl_box_adjoint)
214      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
215    o SVD
216      * first complete, non-hacked version for SVD calculations
217      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
218        performed via direct access files admtlm_vector.it????
219        (via ctrl_[un]pack)
220      * optimcycle is used for ARPACK iteration counter
221        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
222      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
223        and add linear transforms where necessary
224      * controls are initial/final SST, SSS (can be extended; need to check
225        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
226    o mdsio: filename info to both stderr, stdout
227    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
228      from sign change
229    
230    checkpoint55j_post
231    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
232      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
233    o add consistent build directories and .cvsignore files to verification
234    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
235    o make all subroutines 30 or less characters in length for certain older
236      compilers to work (a thorough search only turns up two routines in
237      pkg/ptracers)
238    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
239      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
240    
241    checkpoint55i_post
242    o change arrays for total vertical diffusivity (2.D if explicit,
243      3.D if implicit) ; each ptracer uses its own background value.
244    o added mnc/NetCDF output capability to ocn_compon_interf
245      - added bits to verification/cpl_aim+ocn so that it can run on
246        ITRDA and other clusters without the mpirun "-wd" option
247    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
248      configuration
249    o give MNC the ability to create additional files rather than
250      exceeding a specified file size limit "MNC_MAX_FILESIZE"
251      - the default is just less than 2GB which is a practical limit
252        on many systems
253    o Compute the non-local term using either KPP vertical diffusivity (=default)
254       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
255    
256    checkpoint55h_post
257    o add verification test "vermix"
258    o remove all the *_ioinc flags and replace with the single global
259      outputTypesInclusive flag
260    o allow to set a vertical profile of vertical diffusivity for T & S
261    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
262    o useMNC moved from data.mnc to data.pkg
263    
264    checkpoint55g_post
265    o Renaming carbon AD experiments to comply with testreport conventions
266    o Updating adjoint of Held-Suarez hs94.1x64x5
267    o Fixing directives for non-ECCO forward_step, after ECCO directives
268      have been fixed to avoid recomp. of do_oceanic_phys
269      Works well for global_ocean.90x40x15,
270      but recomp. issue remains for carbon
271    o Updating adjoint output for natl_box_adjoint after
272      pkg/ecco has been modified (see taga c55d_post)
273    
274    checkpoint55f_post
275    o rename to timeave_init_fixed
276    
277    checkpoint55e_post
278    o some delicate re-shuffle of store directives to avoid one
279      extra call of do_oceanic_physics
280      affects ecco_the_main_loop.F, do_oceanic_physics.F
281      checkpoint_lev1_directives.h
282    o NB: this may break global_ocean adjoint temporarily,
283      but it is clear how to fix it. Will do later, need this now.
284    
285    checkpoint55d_post
286    o ECCO specific cost function terms (up-to-date with 1x1 runs)
287    o ecco_cost_weights is modified to 1x1 runs
288    o modifs to allow observations to be read in as
289      single file or yearly files
290    o enable to read exf forcing fields as either
291      single file or yearly files (flag useExfYearlyFields)
292    checkpoint55d_pre
293    
294    o switch between 2-level and 3-level checkpointing
295    o add ability of MNC to write local and "partial" (eg. 2D slices where
296      the full 3D field is never actually stored) arrays to NetCDF files
297      with the correct (that is, the complete multi-dimensional) set of
298      array indicies
299      - used in mom_vecinv() to write the diagFreq output
300      - tested (demonstrated) in verification/aim.5l_cs
301    o further mnc-ification
302      - add verification/lab_sea to the list with mnc setups
303      - fix undefined mnc v-names in cd_code
304      - add kpp to mnc output (both snapshot and timeave)
305    o non-hydrostatic code
306      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
307        in calc_gw.F
308      - defaults to viscAh
309      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
310        friction or Leith) in non-hydrostatic mode, as long as there is
311        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
312    o pkg/cost
313      extend simple cost functions to treat time mean quantities
314      (T,U,V) via cost_accumulate_state from cost_tile
315    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
316        be 2 times larger than the minimum size the advection scheme requires.
317        now get a perfect conservation of salt in advect_cs test-exp (updated)
318    o GGL90 (Gaspar's TKE mixed layer)
319      - add horizontal diffusion of TKE, requires exchanges in
320        do_fields_blocking_exchanges, horizontal diffusivity is zero by
321        default. In OPA there is no horizontal diffusion of TKE but the
322        mixing coefficients are computed from a horizontal average of TKE of
323        6 points or so. I think that diffusion has a little more physical
324        justification.
325      - clean up ggl90_calc in the hope of reducing memory usage (this hope
326        was in vain)
327      - mask tke-variable in ggl90_init
328    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
329    o fix biharmonic diffusion on CS-grid.
330    o more obcs stuff
331      - added obcs_external_fields_load as an alternative to the EXF-pkg option
332        for reading boundary values. This routine is called from
333        obcs_prescribe_read
334      - updated obcs_check
335      - changed sponge layer relaxation parameter units for days to seconds
336      - turned off sponge layer by default
337      - changed argument list of OBCS_CALC to myTime+deltaTclock
338      - fixed about 35 bugs in obcs_external_fields_load
339    
340    checkpoint55c_post
341    o obcs stuff
342      - new runtime flags useOBCSprescribe, useOBCSbalance
343      - re-arranged obcs_calc
344      - moved exf_getobcs to obcs_prescibe_read
345        obcs_prescibe_read is called after ORLANSKI stuff
346        and independent of it (executable can contain all).
347      - updated obcs_check
348      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
349        These may be necessary only if tangential velocities are
350        prescribed at OB, not sure, needs testing.
351    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
352      which simplifies the calls and passes the ifc check-bounds test
353    
354    checkpoint55b_post
355    o add a 2D scalar, Z location, exchange_2 routine.
356    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
357      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
358      affects advect_cs results (for the wrong reason): update output.txt
359    o use a more standard discretization for biharmonic viscosity ;
360     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
361      affects results of dome set-up: update output.txt
362    o fix gad_advection.F (CubedSphere part), back to version 1.23
363    o fix bug in mom_vi_del2uv.F (CubedSphere part).
364    
365    checkpoint55a_post
366    o merged code to
367      * prescribe/read time-dependent open boundaries
368        (works in conjunction with exf, cal)
369      * sponge layer code for open boundaries
370      * each boundary N/S/E/W now has its own CPP option
371        (healthy for the adjoint)
372    
373    checkpoint55
374    o up-to-date adjoint of previous breaks
375      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
376      - global_ocean_ebm: adjoint still needs fix (TLM ok)
377      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
378      - carbon: * remove tr1-related adjoint verification
379                * add ptracer as control variable
380    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
381      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
382    
383    checkpoint54f_post
384    o in verification/carbin/ remove experiment related to
385      ALLOW_PASSIVE_TRACER (array tr1 etc)
386      code_ad/ input_ad/ results_ad
387    
388    o add two new packages
389      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
390        + subject to optimization (memory)
391      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
392        + subject to reordering (many GOTOs in the original code)
393        + so far opps is called for every (i,j) point, and then operates in
394          the vertical; one may want to reorder the scheme in order operate in
395          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
396          fields)
397    o overhaul of IO so that we now have flags for MDSIO and/or MNC
398      - all verification tests compile and run with linux_ia32_g77
399      - defaults are compatible with current input files--nothing
400        should change if you were not previously using MNC
401      - MNC output has been added in numerous places (eg. timeave)
402        but there are still a few writes not yet do-able with MNC
403        (this is in progress)
404      - flags now allow for either/or/both use of MDSIO and MNC and
405        documentation will soon follow
406      - numerous small formatting cleanups for ProTeX
407    o add version info (via BUILD_INFO.h) to MNC and stdout
408    
409    checkpoint54e_post
410    o add two new packages
411      - pp81 (Packanowski and Philander, 1981), Richardson number and
412        stratification dependent mixing
413      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
414      - these scheme operate in a similar manner as KPP (without ghat, of
415        course), however there is only one diffusivity that is used for both
416        temperature and salinity (and passive tracers)ç
417    o add offline package
418    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
419      provided by Stephanie Dutkiewicz
420    o genmake2: add ability to search for C compilers and cleanup test output
421      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
422    
423    checkpoint54d_post
424    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
425    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
426      leading to additional shift by 5 days each year of integration
427       (i.e. leading to considerable offset over the years)
428    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
429    o start with no AB and no initial filtering (staggerTimeStep):
430      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
431    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
432      (external loading & cpl import/export stay in forward_step.F)
433    o update coupling interface to work with new staggerTimeStep
434    o change MDSIO ptracers_pickup.
435    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
436    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
437    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
438    
439    checkpoint54c_post
440    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
441      this affects (truncation error) output.txt of test-exp:
442       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
443    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
444    o change Qnet to always be the net heat flux, (+upward).
445      affects (truncation error) output of natl_box exp.: updated
446    o define the max number of passive tracers in PTRACERS_SIZE.h
447    o start to test mnc routinely in exp0
448    o add sea-ice loading (sIceLoad) as a new forcing field.
449    
450    checkpoint54b_post
451    o add testreport "-j JOBS" option for parallel builds (tested and pretty
452       impressive on Altix and Opteron systems)
453    o diagnostics can now write NetCDF files through the mnc package
454    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
455    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
456    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
457      affects (truncation error) output of lab_sea & natl_box exp.: updated
458    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
459    
460    checkpoint54a_post
461    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
462    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
463    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
464    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
465      + internal_wave (shift in writing cg2d_ini_res)
466    checkpoint54a_pre
467    
468    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
469      - modified verification/lab_sea and natl_box_adjoint accordingly
470    
471    checkpoint54
472    checkpoint53g_post
473    o prepare splitting of thermodynamics: store convect.counter in common block
474    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
475      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
476    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
477    o new parameter "nShapS": allow to treat differently S from T (nShapT)
478    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
479    o restore adjointability
480    
481    checkpoint53f_post
482    o modifications that affect AIM experiment results (update output.txt):
483      - no advection of S at top interface Nr (pkg/generic_advdiff)
484      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
485    o AIM pkg:
486      - include stability function into surf.Flux derivative relative to Tsurf
487      - calculate clear-sky radiation & surface temp. change (for diagnostics)
488    
489    checkpoint53e_post
490    o merged cylindrical coord configuration
491    o added rotating_tank experiment
492    checkpoint53e_pre
493    
494    checkpoint53d_post
495    o faulks upgraded: re-generate output.txt that have changed:
496       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
497    o Added Bryan and Lewis, 1979, vertical diffusivity profile
498    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
499    o added Sadourny discretization of Coriolis
500      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
501      - re-enabled use of omega3 (useAbsVorticity)
502    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
503      vector-invariant equations
504      - note: does *NOT* yet use same variable visc. for no-slip BC's.
505    o recoded the lateral boundary conditions for non-hydrostatic w, this time
506      hopefully without new bugs
507      - still to do: biharmonic friction for non-hydrostatic w
508    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
509    o regenerated output for global_ocean_ebm (using -ieee)
510    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
511      of mom_common/
512      - simple re-arrangement of instructions within computing loop
513    checkpoint53d_pre
514    
515    checkpoint53c_post
516    o new version of coupler for AIM+thSIce and Ocean models
517     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
518     - land: change Evaporation of snow
519     - aim with thSIce: fix bug in snow-precip.
520    o changes to calc_gw.F
521     - bug fix for w^2 term near the bottom boundary
522     - (hopefully) improve the lateral slip boundary condtions for use with
523        partial/looped cells
524      - because the bug fix changes two verification experiments anyway (exp5
525        and plume on slope), change the lateral boundary condition from half slip
526        to the value of no_slip_sides
527    o ebm package wasnt quite up to the parallel task. Fixed that.
528    o Adjoint of EBM package + verification
529      * TLM OK
530      * ADM not sufficient accuracy yet (needs further testing)
531    
532    checkpoint53b_post
533    o Commiting new energy balance model to repository
534      * package is pkg/ebm
535      * verif. is verification/global_ocean_ebm
536      * references are in ebm_driver.F
537    C      * X. Wang, P. Stone and J. Marotzke, 1999:
538    C        Global thermohaline circulation. Part I:
539    C        Sensitivity to atmospheric moisture transport.
540    C        J. Climate 12(1), 71-82
541    C      * X. Wang, P. Stone and J. Marotzke, 1999:
542    C        Global thermohaline circulation. Part II:
543    C        Sensitivity with interactive transport.
544    C        J. Climate 12(1), 83-91
545    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
546    C        Destabilization of the thermohaline circulation
547    C        by atmospheric eddy transports.
548    C        J. Climate 7(12), 1870-1882
549    o Will need long integration testing.
550    checkpoint53b_pre
551    
552    o created pkg/mom_common in preparation for variable viscosity code
553    o renamed and split ini_mnc_io
554    o pkg/land: only liquid water can diffuse or run-off
555    o AIM using land: soil wetness availability account for snow
556    o added printMapIncludesZeros to EEPARMS namelist
557    
558    checkpoint53a_post
559    o restore TAMC compatiility for exf_constants.h
560      (no usage of _d in .h)
561    o Additional storing in KPP in an attempt to fix
562      TAMC problem with adjoint of KPP code.
563      (no success...)
564      Identical code works fine with TAF.
565    o Fixed verification/natl_box_adjoint experiments.
566      Initial conditions for Experiments 4 and 5 are now
567      set to "SEAICE_initialHEFF=0", which is more reasonable,
568      and hence gives results closer to that of Experiment 2.
569      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
570    
571    checkpoint53
572    o stable checkpoint with up to date adjoint
573      TLM tests only run for 1st grdchk at the moment. Its unclear if
574      this is a code problem or a problem with resetting code for g_
575      variables that is being autogenerated wrong.
576      Otherwise:
577       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
578       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
579         are both still in chaos following their security messes.
580    
581    checkpoint52n_post
582    o various build (mostly genmake2) changes including:
583      - ability to build/run more easily within Cygwin and MacOS X
584      - more complicated Makefiles with a stronger dependence on Gnu Make
585    o pkg/seaice modifications
586      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
587        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
588        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
589      - changed proxy for geostrophic velocity and updated
590        verification/lab_sea/results/* accordingly
591      - removed ADI dynamic solver from pkg/seaice
592      - replaced all occurrences of 1/CSTICE or 1/CSUICE
593        they caused a segmentation fault under certain circumstances
594      - removed unused field WATR
595    o bug fix in exf-package:
596      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
597         now reflect that.
598    o small fixes in the cal-package:
599      - set reference date to first of January for the 'model'-calendar
600      - failing of cal_CheckDate in cal_FullDate now actually results in a
601        warning
602    o small modifications in exf-package to increase flexibility:
603      - change climtempfreeze from a constant to a runtime parameter that
604        is specified in data.exf_clim (default = -1.9)
605      - introduce runtime parameter windstressmax (default = 2.0) that is
606        specified in data.exf
607    o fix in pkg/thsice:
608      - update Evap (Tsf changes) to be consistent with Latent heat flux
609      - maintain snow precipitation unchanged (even if Tsf >=0).
610     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
611    
612    checkpoint52m_post
613    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
614      this does not change any of the results, because myIter=0 in swfrac always
615      lead to jwtype=2 (the default anyway), but the call makes little sense
616      as a default
617    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
618    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
619      atmospheric model (AIM) to use it ; add a "slab ocean" component.
620    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
621    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
622    o extending useSingleCpuIO option to work with new exch2 I/O format
623      - old-style, missing-tile I/O is still accessible by defining CPP
624        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
625    o monitor package can write to NetCDF files and/or STDOUT
626    o fix re-definition bug in MNC_GRID_INIT_ALL()
627    o doc/api_reference added
628      - a framework for building an API Reference Manual using all
629        the "protex" comments embedded in the code
630      - see pkg/generic_advdiff, pkg/mnc for examples
631    o MNC:
632      - make myThid the last argument for all subroutines
633      - new default for the grid files: NO halos
634      - add useMNC and other run-time flags
635      - separate per-file-group handling of the unlimited dimension
636      - early initialization of MNC w/ flags read at the eeboot stage
637        and lookup tables set in initialize_fixed
638      - write all MNC output to a freshly-created directory
639    o thermodynamics sea-ice (thsice) is now tested with testreport.
640    o test exp. advect_cs: use the standard cs32 grid ; update output.
641    o Added functionality to grdchk:
642      pick global i,j,k position (or nearest wet) where to perform check.
643    
644    checkpoint52l_post
645    o new land formulation:
646      a) use ground enthalpy as prognostic variable to ensure exact
647         energy conservation.
648      b) account for water temperature and for latent heat of freezing
649         in all processes (rain, run-off, ground storage)
650      c) compute surface and ground temperature implicitly.
651    o aim_v23 modification for new land model:
652      a) Treat separately land / ocean / sea-ice surface fluxes
653         to allow implicit computation of land & sea-ice surface temp.
654      b) add snow precipitation.
655    checkpoint52l_pre
656    
657    o fix problem (when 1 tile is empty) in min/max monitor.
658    o fix bug in timeAve (u,vZetatave in common block)
659    o no restoring terms under ice for pkg/seaice
660    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
661    o bug fix for pkg/seaice pickups
662    o change MNC call locations and add coordinate attributes
663    o mask vorticity at the corner ; affects global_ocean.cs output
664    o fix ini_curvilinear_grid ; test CS experiments with mpi
665    o aim.5l_cs: modify sea-ice fraction input file ; update output
666    o exf: Adding simple range check routine for exf fields after read
667    
668    checkpoint52k_post
669    o removed top-level directory "diags"
670      - we migrated these functions to pkg/timeave a long time ago
671    o fixed bug introduced in pkg/monitor
672    o accuracy ctrlprec = 32 insuffient for gradient checks using
673      averaged fields (I/O via cost_averages)
674      -> use ctrl.h in active_file*.F to control I/O precision.
675    o paramter list of CALL ADTHE_MAIN_LOOP
676    o added initial do_the_model_io to ecco
677    o set all ...Freq to zero after cost_final
678      taveFreq, dumpFreq, pChkptFreq
679    o MAIN and ECCO differentiability restored
680    
681    checkpoint52j_post
682    o fix nchklev in tamc.h for global_ocean...
683    o Bringing flow and store directives up-to-date
684    o Really weird thing!
685      call do_the_model_io from the_main_loop with parameters
686      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
687      TAF places a faulty re-call of initialise_varia
688      after cost_final call which should not be there!
689    checkpoint52j_pre
690    
691    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
692      error messages
693    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
694    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
695      debug output
696    o modfied mdsio_writefield.F to handle non-global files under exch2
697    o update AIM Cubed-Sphere exp (aim.5l_cs):
698      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
699    o update AIM Equatorial Channel exp:
700      use standard aim_v23 pkg and change the SST fields to be more realistic.
701    o globalFile now works with exch2
702    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
703      mon_vort3.F to make exch2 friendly with >1 tile per cube face
704    o limit timeave output for hi-res integrations
705    
706    checkpoint52i_post
707    o removed CPP_EEOPTIONS.h from verification/*/code
708    o updated the tiling for global_ocean_pressure
709    checkpoint52i_pre
710    
711    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
712      the old pkg/aim).
713    
714    checkpoint52h_pre
715    o shortened offending lines in exch2_send_rx?.template
716    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
717    o genmake2: add build & execute test for NetCDF code
718    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
719      old grid files, moved CPP_EEMACROS.h to pkg/exch2
720    o added useSingleCPUIO flag to monitor.F and mon_out.F
721    o added temporary hack for sea-ice dynamics on the cube:
722      metric terms are ignored and it is assumed that
723      there is no sea-ice on cube faces 1, 2, 4, and 5.
724    
725    checkpoint52f_post
726    o added exch2 cube routines to pkg/exch2
727    o modified hs94.cs-32x32x5 to use it
728    o added new grid files to hs94.cs-32x32x5
729    checkpoint52f_pre
730    
731    checkpoint52e_post
732    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
733      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
734    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
735      to work with implicit vertical advection and AB ;
736    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
737    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
738     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
739    checkpoint52e_pre
740    
741    o fix bug in impldiff when Nr=1 or Nr=2.
742    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
743    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
744    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
745      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
746    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
747    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
748    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
749    
750    checkpoint52d_post
751    o re-tiled many expts to allow comparison in multi-processor mode
752      - updated output accordingly
753      - changed hs94.128x64x5 to use intial T from file rather than use the
754        random number generator
755    o add infrastructure in model routines for fizhi and gridalt packages
756    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
757    o changes to permit hi-res, cubed-sphere, configuration
758      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
759      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
760      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
761        of surface winds for the cube
762      (A verification experiment, based on global_ocean.cs32x15, but with
763       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
764       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
765       complete with example surface forcing files and matlab scripts to look
766       at the output and compare it with that of global_ocean.cs32x15.)
767    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
768       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
769       to conform to the common rule.
770    o check-in the first version of the coupler + interfaces for multi-components
771       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
772       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
773       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
774       - ocean and atmos. share the same horizontal grid (no interpolation).
775       - exchanges between component and coupler is done in forward_step
776    o new verification experiment, cpl_aim+ocn:
777       coupled ocean - AIM atmosphere on cs32 grid.
778    
779    checkpoint52d_pre
780    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
781    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
782    
783    checkpoint52c_post
784    o Fixing OPTIONS files for use of exf:
785      - ALLOW_ECCO not needed
786      - ECCO_CPPOPTIONS.h should not be included from
787        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
788        as has been the case in the past
789      - All cal/exf related options are currently set in
790        single header file. Should remain so until we
791        agree on a consistent new policy.
792    o Removed all CPP options for cal package.
793      cal has no more CPP options.
794    o modified STOREs in GAD_ADVECTION
795    o corrected key comp. for passkey
796    
797    checkpoint52b_post
798    o new version: "thsice" of thermodynamic sea-ice pkg:
799     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
800     - modify fluxes but do not change theta directly;
801     - light cleaning of bulk_force pkg (still needed with thsice).
802     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
803       + output_thsice.txt to test thsice & bulk_force pkgs.
804    o put back grid & coriolis monitor output.
805    checkpoint52b_pre
806    
807    o call "do_the_model_io" at the beginning (=> dump initial state)
808    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
809    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
810      (need info on NUMBER_OF_PTRACERS)
811    o missing PTRACERS headers in some routines
812    o default tamc.h in pkg/autodiff supposed to crash
813      to ensure proper customization
814    
815    checkpoint52a_post
816    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
817      - moved surfaceTendencyTice from pkg/seaice to main code
818      - subroutine FREEZE_SURFACE now limits only surface temperature
819        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
820        => new output.txt for global_ocean.cs32x15 & global_with_exf
821      - keep the old version of FREEZE for backward compatibility;
822        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
823      - corresponding modifs for TAF directives
824    o added surface flux output variables to TIMEAVE_STATVARS
825    o time-averaged output for pkg/ptracers
826    o fix problem with ECCO-related divided adjoint
827      snapshot file was missing some ad-variables,
828      but no warning issued by TAF
829    
830    checkpoint52a_pre
831    o some bug fixes for #undef REAL4_IS_SLOW
832    
833    checkpoint52 = ecco_c52_e35
834    o after testing adjoints of checkpoint51u_post
835    
836    checkpoint51u_post
837    o this is the post-merge tag of the ecco-branch
838      (needs another clean checkout and re-testing)
839    o various natl_box_adjoint configs and results
840      but no input fields
841    o obcs adjoint not yet merged!
842    o adding ECCO global 1x1 and 2x2 degree configs
843    o updated/extended some store directives for seaice
844    o pkg/ecco now containes ecco-specific part of cost function
845    o top level routines the_main_loop, forward_step
846      supersede those in model/src/
847      previous input data.cost now in data.ecco
848      (new namelist ecco_cost_nml)
849    o in ctrl/ cleaned some cross-dependencies and updated CPP options
850    
851    checkpoint51t_post
852    o this is the pre-merge tag of the ecco-branch
853    
854    checkpoint51s_post
855    o cleanup: removed various obsolete #define-s
856    o pkg/grdchk
857      - renamed 'ph-grd 3' to 'grad-res'
858      - merged from ecco-branch
859        (remaining bug fixes for obcs gradient checks)
860      - additional high-precision output for testreport
861        (grep for 'precision_grdchk_result')
862    
863    checkpoint51r_post
864    o cleaned up or removed CPP_OPTIONS.h files
865    o updated results for some of the tests to reflect the new
866      optfiles (-ieee: -O0 instead of -O3)
867    
868    checkpoint51q_post
869    o cd_code:
870      - moved cd_scheme.F -> cd_code_scheme.F
871      - separate read_checkpoint from cd_code_ini_vars.F
872      - separated cd_code part from write_checkpoint
873      - updated AD_SOURCE, generated .flow
874      - added CD_CODE_VARS.h to the_main_loop
875      - Moving cd_code specific store dir.s to pkg/cd_code
876    o ctrl package totally restructured
877      - pack/unpack now optional and decoupled from
878        xx_/adxx_ I/O
879      - ctrl_pack/unpack cleaned
880        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
881      - confined inclusion of AD_CONFIG.h to where necessary.
882    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
883    
884    checkpoint51p_post
885    o create initial cd_code package
886      - WARNING: the initialization of fields within packages
887        is broken because INI_FIELDS (where READ_CHECKPOINT is
888        called) is called *before* PACKAGES_INIT_VARIABLES.
889        This seems to be backwards since
890        1) its important to initially zero the entire field including
891           the "halo" region
892        2) zeroing needs to be done *before* reading pickup info
893           and the pickup call might or might not happen in any
894           particular run
895      - this needs an overhaul for R2
896    o cleanup verification/*/code/GMREDI_OPTIONS.h
897    o cleanup testreport
898    
899    checkpoint51o_post
900    o bringing AD-related verif's up to date with genmake2
901      - carbon/
902      - global_ocean.90x40x15/
903      - hs.94.1x64x5/
904      - (front_relax/ )
905    o (more) consistent directory structure for AD-related verif.'s
906    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
907    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
908    o bug fix in find_alpha.F for MDJWF:
909      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
910        change rho -> rho-rhoConst
911      - replace call find_rho to find_rhonum
912    o initialisation of rFlx extended to full array (required by TAF)
913      and shifted to thermodynamics
914    o removed PTRACERS.h in ptracers routine
915    o added surfacetendencyPtr to S/R parameter list pracers_forcing
916    o Correcting initialisations for fVerU, fVerV.
917    o helping TAF to recognize dependency on kUp for
918      fVerU, fVerV
919    o Replacing delZ by delR in pkg/ctrl/
920    checkpoint51o_pre
921    
922    o undid all of cp51 pending some cleanups and discussion
923    o added the [#include "AD_CONFIG.h"] statement to all files that need
924       it for adjoint/tl #defines
925     o re-worked the build logic in genmake2 to support AD_CONFIG.h
926     o removed tools/genmake since it no longer works
927    
928    checkpoint51n_post
929    o modifications to make FREEZE flux visible to pkg/kpp
930      - moved surfaceTendencyTice from pkg/seaice to main code
931      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
932      - subroutine FREEZE now limits only surface temperature
933        (this means new output.txt for global_ocean.90x40x15,
934         global_ocean.cs32x15, and global_with_exf)
935    o added surface flux output variables to TIMEAVE_STATVARS
936    
937    checkpoint51n_pre
938    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
939    o added [#include "AD_CONFIG.h"] to all files that use the following
940      defines:
941      - ALLOW_ADJOINT_RUN
942      - ALLOW_TANGENTLINEAR_RUN
943      - ALLOW_ECCO_OPTIMIZATION
944    
945    checkpoint51m_post
946    o incorporating changes to get TAMC/TAF working in genmake2
947      - added new TAMC/TAF targets to the Makefile
948      - various cleanups related to package handling
949      - these changes should have no impact on the forward model
950    
951    checkpoint51l_post
952    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
953     - faster algorithm for cal_addtime.F
954     - higher precision arithmetic, where needed
955     - pkg/exf *startdate variables changed from calendar date to
956       model integration time
957    
958    checkpoint51l_pre
959    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
960    o enable to apply restoring on S & T only in a latitude band.
961    o update output (external_forcing_surf modif. change truncation errors)
962       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
963    
964    checkpoint51k_post
965    o change default to: useNHMTerms=.FALSE.
966     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
967       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
968     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
969        exp1, ideal_2D_oce
970     - change data file of oceanic exp (leave the results unchanged for now)
971       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
972    o set gravitySign automatically according to the vertical coordinate used
973      (and change sign: back to "logical" value: +1 when R increases downward)
974    o added an include barrier to the default CPP_OPTIONS.h and
975      removed the #include "PACKAGES_CONFIG.h" from it
976    o fix a bug in mom_fluxform (from chk51j_post)
977    
978    checkpoint51j_post
979    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
980    o adjusted some flow directives (dynamics, thermodynamics)
981    o added cubed-sphere case to test cost function
982    o heckpoint_lev?_directives.h now include
983      pkg-specific directives, whenever those are enabled.
984    o Moving pkg-specific flow directives to corresponding pkg
985      Moving pkg-specific differentiation list to corresponding pkg
986      Moving pkg-specific checkpoint-lev storing to corresponding pkg
987      ---> conventions are
988           - pkg_ad.flow
989           - pkg_ad_diff.list
990           - pkg_ad_check_lev?_dir.h
991    
992    checkpoint51i_post
993    o merge of the branch-genmake2
994      - knowingly breaks the older genmake
995      - automatic generation of all ALLOW_${PKG_NAME} defines
996      - new testreport supersedes older testscript
997    o large number of package inclusion and header cleanups
998    checkpoint51i_pre
999    
1000    o new output for adjoin of global ocean vector invariant
1001    o fix for checkpoint of thermodynamic seaice and bulk_force
1002    o Steph gchem various cleanups
1003    
1004    checkpoint 51h_pre
1005    o fixed some single quotes
1006    o modify gchem pkg to be more versatile
1007    o modifications to clean up dic pkg
1008    o add pkg/cfc
1009    
1010    checkpoint51g_post
1011    o provide links for ARPACK and ADM*TLM
1012    o start removing verification/vero/
1013    o update AD-related stuff
1014      (in particular some IF-statements in model/src/ routines)
1015    o adding to verification/global_ocean.90x40x15/ adjoint of
1016      vector invariant setup
1017    
1018    checkpoint51f_post
1019    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1020    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1021      of tracer Green's fucntions for ocean inversion project.
1022    
1023    checkpoint51f_pre
1024    o Added on-the-fly spatial interpolation capability
1025        "USE_EXF_INTERPOLATION" to pkg/exf.
1026      - This is a temporary Cartesian-grid hack until
1027        the super-duper ESMF coupler becomes available.
1028      - See verification/global_with_exf/README for usage example.
1029      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1030        flags and modified pkg/seaice accordingly.
1031    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1032        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1033        non-local transport term.
1034    
1035    checkpoint51e_post
1036    o pkg/mom_vecinv:
1037      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1038      - add time-ave diagnostic of vorticity advection.
1039    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1040    o atmospheric geopotential: - include water vapor effect;
1041                                - use p^kappa in p* scaling.
1042    o land pkg: read initial state from files.
1043    o AIM : add stratospheric drag in the upper level
1044    
1045    checkpoint51d_post
1046    o change function ILNBLNK (=> last non-blank char.) to return zero
1047      (instead of the string length) when the string. char is empty
1048    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1049    o modif's to restore TAMC compatibility
1050      - avoid "_d" constructs in PARAMETER declarations
1051      - avoid interrupting lines by comment lines
1052    o Use cluster local disks for purely local I/O
1053      vs. globally visible disks needed for ctrl stuff
1054      (merged from ecco-branch)
1055      - new active_file_loc... and mdsio_..._loc routines
1056      - affected packages: autodiff, ctrl, grdchk, mdsio
1057    
1058    checkpoint51c_post
1059    o introducing integer flag debugLevel
1060      - debLevZero: suppress all output
1061      - debLevA: standard
1062      - debLevB: equivalent to current debugMode=.TRUE.
1063    o introducing pathname variable mdsioLocalDir for mdsio
1064      that can be specified at runtime
1065      (relevant for cluster I/O to local disk)
1066    `
1067    >>>checkpoint51b_post
1068    adjoint of ptracers
1069    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1070    o extended state in checkpoint_lev?, etc.
1071    o alternative ctrl/cost with tr1 or ptracer
1072    o new comlev1_bibj_ptracers
1073    o new ptracers.flow
1074    o made ptracers_forcing same as external_forcing_s
1075    o added verification for adjoint with ptracers
1076      - adm. grdchk fail so far
1077      - tlm. grdchk OK
1078      - checked tapelev/comlev recomputations: OK
1079    <<<checkpoint51b_pre
1080    
1081    checkpoint51a_post
1082    o added code for biogeochemistry package
1083      - new pkgs: dic, gchem
1084      - new subroutine in ptracers
1085    o modify code for biogeo packages
1086      - in model/src and pkg/ptracers
1087    
1088    checkpoint51
1089    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1090      - autodiff, ctrl, exf, grdchk, seaice
1091      kept separate packages
1092      - cost, ecco, obcs
1093    o updating verification/internal_wave, verification/lab_sea
1094      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1095    
1096    checkpoint50i_post
1097    o Preparing next differentiable checkpoint and sync
1098      of MAIN vs. ecco-branch
1099      - 1st step: this one is differentiable
1100      - 2nd step: next(! not this) checkpoint will have updated packages
1101                  from ecco-branch)
1102    
1103    checkpoint50h_post
1104    o new package "land": provide surface BC for AIM.
1105    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1106    o AIM: use true log-P extrapolation for near surface temp (= as in
1107        F.Molteni paper) ; update aim.5l_cs output.
1108    o New variable in PARM03 for more flexible pickups
1109    o somewhat cleaned package initialisation sequence for
1110      ctrl/ cost/ ecco/ in packages_... routines
1111    
1112    checkpoint50g_post
1113    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1114      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1115      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1116        made the default because of faster convergence than ADI
1117    
1118    checkpoint50f_post
1119    o exf totally restructured
1120      - replaced all exf_set_ routines by one generic exf_set_gen.F
1121        and made sure it's still differentiable
1122      - split exf_getffields.F into new exf_bulkformulae.F
1123      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1124      - updated adjoint/makefile and relevant verif. accordingly
1125    
1126    checkpoint50f_pre
1127     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1128          + change Evap over land. (update aim.5l_cs output)
1129     o added missing .cvsignores and made uniform across expts
1130     o changed configuration of tidal_basin_2d expt
1131     o added pkg/debug functions for tracing code in fatal crashes
1132     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1133     o new fn in pkg/monitor to stop model if solution grows too big
1134     o removed lots of single quotes from comments
1135    
1136    checkpoint50e_post
1137    o make KPP work with PTRACERS
1138     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1139       nearly a copy of kpp_transport_s
1140     - there is no analogue to SurfaceTendencyS, so I have to use
1141       gPtr(of the surface layer) instead
1142    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1143    checkpoint50e_pre
1144    
1145    checkpoint50d_post
1146    o change kpp output from multiple-record state files to single-record state
1147      files analogous to write_state.F
1148    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1149      analogous to the cg2d-related output.
1150    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1151      so that writing to internal file fn (with length 512) fails.
1152    checkpoint50d_pre
1153    
1154    checkpoint50c_post
1155    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1156    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1157    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1158    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1159    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1160    
1161    checkpoint50c_pre
1162    Merging from release1_p13:
1163    o bug fix for pkg/seaice dynamic solver
1164    o Added SEAICE_initialHEFF to pkg/seaice
1165    
1166    checkpoint50b_post
1167    o store u*,v* in gU,V instead of in guNm1,gvNm1
1168    o in order to put the momForcing out of the Adams-Bashforth:
1169      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1170      to timestep.F
1171    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1172    o re-generate output for highly sensitive test-exp:
1173       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1174    
1175    checkpoint50b_pre
1176    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1177    o corrected CPP option mismatch in exf_Bulk... functions for case
1178      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1179    
1180    checkpoint50a_post
1181    o Bug fix for merging between c50 and KPP.
1182      ikey was passed from thermodynamics to kpp_calc via
1183      common block rather than being recomputed in kpp_calc,
1184      in contradiction with new key itdkey.
1185      New key ikppkey created, and tamc.h headers updated.
1186    
1187    checkpoint50
1188    - 2nd step of merge with ecco-branch:
1189      merge changes in ecco-branch back into main trunk
1190    - bug fix in find_alpha
1191    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1192    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1193    - merged some sliced AD support routines
1194    
1195    checkpoint49
1196    merged from ecco-branch:
1197    o exf:
1198      - Enable initialisation of forcing fields to constant
1199        (runtime) values.
1200      - in exf_getffields.F
1201        Reduce i-/j-loop to interior domain, discarding overlaps.
1202        That also fixes wrong TAF-key computations for key_1, key_2
1203        with bulf formulae.
1204      - exf_init.F modify #ifdef for exf_init_evap
1205      - exf_getffieldrec.F, ctrl_getrec.F
1206        The following INT-usages are not safe:
1207          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1208          fldcount = int(fldsecs/fldperiod) + 1
1209        and were modified.
1210    o autodiff: checkpoint_lev...
1211      - updated storing for bulk formulae (some arrays were missing)
1212      - added state for seaice package
1213      - synchronized with main branch
1214    o DIVA:
1215      Modif.s in
1216      - the_main_loop.F
1217      - the_model_main.F
1218      and added cost_final_restore.F cost_final_store.F
1219      o With these changes, it is possible to fully separate
1220        the first forward run to compute the cost function (mdthe_main_loop)
1221        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1222        into separate model executions.
1223        This enables better tuning of DIVA to given queue sizes.
1224      o Loss of cost function value in consecutive DIVA runs is
1225        fixed by storing to 'costfinal' file.
1226      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1227        beginning/end of adjoint integration is accounted for.
1228      The current changes apply to TAF-1.4.26.
1229      TAF has one remaining bug, requiring one manual change
1230      (see MITgcm manual).
1231    o cal: synchronized between MAIN and ecco-branch
1232    
1233    checkpoint48i_post
1234    o Changes to restore differentiability of code w.r.t. previous tag
1235      (mostly adding new routines to make list and replacing
1236      pressure by totPhiHyd).
1237    o Updated and merged grdchk package
1238      - has both ADM and TLM checks
1239      - works for single- and multi-proc.
1240      - output cleaned
1241      - worked successfully for parallel DIVA
1242    o genmake:
1243      - Adding -platform=SP4
1244      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1245    o Modif. for DIVA:
1246      ctrl_unpack should not be called in intermediate DIVA interval.
1247      (similar thing would apply for active files such as
1248      tbar, sbar, psbar, which should not be reinitialised;
1249      only relevant for ecco-branch)
1250    
1251    checkpoint48h_post
1252    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1253    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1254    o Added SEAICE_initialHEFF to pkg/seaice
1255    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1256    
1257    checkpoint48g_post
1258    --- EOS:
1259    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1260      store total Potential in totPhyHyd for diagnostics & EOS.
1261    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1262    --- Pressure/geopotential gradient:
1263    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1264    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1265      ( changes results of global_ocean_pressure )
1266    o NLFS + z-coord.: add eta*Rho' contribution.
1267    o accurate phiHyd when using interface-W at the middle between 2 centers
1268     ( changes results of ideal_2D_oce )
1269    o includes r* 2nd term in potential gradient.
1270    
1271    checkpoint48f_post
1272    Merging from release1_p12:
1273    o Modifications for using pkg/exf with pkg/seaice
1274      - improved description of the various forcing configurations
1275      - added basic radiation bulk formulae to pkg/exf
1276      - units/sign fix for evap computation in exf_getffields.F
1277      - updated verification/global_with_exf/results/output.txt
1278    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1279      (SBO) core products, including oceanic mass, center-of-mass,
1280      angular, and bottom pressure (see pkg/sbo/README.sbo).
1281    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1282      to avoid negative values in shallow regions.
1283      - updated verification/natl_box/results/output.txt
1284      - updated verification/lab_sea/results/output.txt
1285    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1286    o Added useSingleCpuIO option (see PARAMS.h).
1287    o Updated useSingleCpuIO option in mdsio_writefield.F to
1288      work with multi-field files, e.g., for single-file pickup.
1289    o pkg/seaice:
1290      - bug fix in growth.F: QNET for no shortwave case
1291      - added HeffFile for specifying initial sea-ice thickness
1292      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1293    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1294      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1295    o pkg/seaice:
1296      - adjoint-friendly modifications
1297      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1298    
1299    checkpoint48e_post
1300    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1301    o dynamics: change definition of computational domain & adapt mom_fluxform
1302      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1303    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1304        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1305        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1306        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1307        inverted_barometer solid-body.cs-32x32x1
1308      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1309    
1310    checkpoint48d_post
1311    o in preparation for r*:
1312     a) use pre-computed gradient of hydrostatic potential:
1313        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1314     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1315        => affects results of glob_oce_pressure (different truncation error)  
1316      update output.txt of ideal_2D_oce & global_ocean_pressure
1317    
1318    checkpoint48d_pre
1319    o in preparation for r*:
1320      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1321      pass the 2 comp. of the grad. as arguments to momentum S/R.
1322      but for the moment, only used if it does not change the results.
1323    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1324    
1325    checkpoint48c_post
1326    Modifications in treatment of initial flux forcing controls
1327    to avoid extra storing of flux fields.
1328    
1329    checkpoint48c_pre
1330    o Added tidal_basin_2d experiment (currently 1D!)
1331    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1332    
1333    checkpoint48b_post
1334    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1335     (modification to pressure gradient not yet implemented)
1336    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1337      (for U & V) that are used for vertical advection of momentum.
1338    
1339    checkpoint48a_post
1340    o In preparation for r*, use temp. array to compute vertical transport
1341       in flux-form momentum pkg. => change results of few test-exp.
1342      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1343                        lab_sea, natl_box & plume_on_slope
1344    
1345    checkpoint48
1346    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1347    
1348    checkpoint47j_post
1349    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1350    o moved adexch from forward_step to addummy_in_stepping
1351    o added exch in ctrl_map_...
1352    o aveFreq.=0. at end of cost_final to avoid overwrite in
1353      reverse checkpointing loop
1354    o Yet more changes in gmredi:
1355      * adgmredi_calc_tensor
1356        avoiding all recomputation of gmredi_slope_limit
1357      * adgmredi_x/y/rtransport
1358        added flag for excessive storing to avoid recomp. of
1359        u/v/rtans, dTdx/y/z
1360        -> this is not really necessary and very memory-consuming
1361      * adgmredi_slope_psi:
1362        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1363      * gmredi_slope_limit
1364        re-activated full calculation of taperfct for case 'ac02'
1365    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1366    
1367    checkpoint47i_post
1368    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1369    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1370      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1371    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1372    o gmredi: fix few bugs.
1373    
1374    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1375    This will be a good checkpoint to plug into the ecco-branch.
1376    o few modif.'s to get latest version adjointed
1377      (mainly kick out code in ini_linear_phisurf)
1378    o modif's to run adjoint with exactConserv
1379    o case GM_BOLUS_ADVEC should be cleaned
1380      S/R gmredi_slope_psi should be cleaned
1381    o verification/carbon now has exactConserv=.TRUE.
1382    
1383    checkpoint47g_post
1384    o time-average AIM output: becomes independent from statvars time-average
1385      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1386    o After TAF bug fix:
1387      Tested adjoint of gmredi package.
1388      Tests were done with checkpoint47 rather than with latest
1389      checkpoint47f_post since the latter is broken for the adjoint
1390      verification/carbon/ contains both ADM and TLM gradient checks.
1391    Here they are, before they get changed/lost/stolen.
1392    Mostly modif.'s to fix numerical sensitivities.
1393    Gradient checks OK for
1394    - GM_taper_scheme:
1395      * clipping
1396      * ac02
1397      * linear
1398      * glw91
1399      * dm95
1400      * ldd97
1401    - GMREDI_OPTIONS:
1402      * GM_VISBECK_VARIABLE_K
1403      * GM_NON_UNITY_DIAGONAL
1404      * GM_EXTRA_DIAGONAL
1405      * GM_BOLUS_ADVEC
1406    in conjunction with data.gmredi parameters to be checked in
1407    in a few minutes under verification/carbon/code/
1408    
1409    checkpoint47f_post
1410    Merging from release1_p10:
1411    o modifications for using pkg/exf with pkg/seaice
1412      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1413        and SEAICE_EXTERNAL_FLUXES
1414      - pkg/exf CPP options EXF_READ_EVAP and
1415        EXF_NO_BULK_COMPUTATIONS
1416      - usage examples are Experiments 8 and 9 in
1417        verification/lab_sea/README
1418      - verification/lab_sea default experiment now uses
1419        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1420    
1421    checkpoint47e_post
1422    o created a tag prior to creating a branch
1423    
1424    checkpoint47d_post
1425    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1426      at the bottom boundary had an erroneous half slip boundary condition
1427    o added bottom drag and no slip boundary condition capabilities to
1428      oceanic pressure coordinates code
1429    o added new verification experiment global_ocean_pressure, this experiment is
1430      also described in the tutorial section of the manual
1431    checkpoint47d_pre
1432    
1433    checkpoint47c_post
1434    o Added a verification experiment for a global cubed-sphere ocean run
1435      -  verification/global_ocean.cubed32x32x30
1436      -  uses pkg/therm_seaice and pkg/bulk_forcing
1437    
1438    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1439    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1440      when using P-coordinate; only implemented for atmospheric config.
1441    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1442      NOTES: requires option NONLIN_FRSURF to be "#define".
1443    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1444    
1445    checkpoint47b_post
1446    Merging from release1_p9:
1447    o pkg/seaice
1448      - removed GOTO's and added taf directives
1449      - double precision constants to reduce the g77 (Linux)
1450        to F77 (SGI) differences reported in release1_p8
1451    o tools/genmake
1452      - added SGI options
1453    o verification/testscript
1454      - updated to that of checkpoint47a_post
1455    o verification/global_ocean.90x40x15/input/eedata
1456      - modified for SGI f77 compatibility
1457    o verification/lab_sea
1458      - added description of sea-ice model
1459      - added missing matlab routines
1460      - added test of thermodynamics parallelization
1461    
1462    checkpoint47a_post
1463    o new pkg: aim_v23
1464     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1465       for now, keep the same surface forcing as before.
1466     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1467     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1468     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1469    o add diagnostic of surface correction term in monitor output
1470    
1471    o bulk_force and therm_seaice
1472    - Two packages:  bulk_force (Bulk forcing)
1473      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1474    - Earlier integration from Stephaine Dutkiewicz
1475      and Patrick Heimbach.
1476    - Two ifdef statements for compile time,
1477       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1478    
1479    checkpoint47
1480    differentiable version of checkpoint46n_post
1481    o bug fix in quasihydrostaticterms
1482    o * "clean" adjoint code (in terms of extensive recomputations)
1483        can now be obtained for all GMREDI options (i.e. for
1484        - GM_VISBECK_VARIABLE_K
1485        - GM_NON_UNITY_DIAGONAL
1486        - GM_EXTRA_DIAGONAL
1487        - GM_BOLUS_ADVEC )
1488      * However, wrong gradient check problem remains unsolved.
1489      * New CPP options have been introduced for different
1490        tapering schemes
1491    o external_fields_load now part of differentiation list
1492    o pressure needs multiple storing;
1493      would be nice to have store_pressure at beginning or
1494      end of forward_step, e.g. by having phiHyd global (5-dim.)
1495      (NB: pressure is needed for certain cases in find_rho,
1496      which is also invoked through convective_adjustment).
1497    o recomputations in find_rho for cases
1498     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1499    o #define ATMOSPHERIC_LOADING should be differentiable
1500    o ini_forcing shifted to begining of initialise_varia
1501    o Incorporating QNVS line search routines into MITgcm
1502      (this is separate code, and therefore not under pkg)
1503      lsopt/, optim/
1504    o Updated verification/carbon/
1505      - #define GM_VISBECK_VARIABLE_K
1506      - GM_taper_scheme    = 'ldd97'    
1507    
1508    checkpoint46n_post
1509    Merging from release1_p8:
1510    o verification/natl_box:
1511      updating new external_fields_load routine
1512    o New package: pkg/seaice
1513      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1514      The sea-ice code is based on Hibler (1979-1980).
1515      Two sea-ice dynamic solvers, ADI and LSR, are included.
1516      In addition to computing prognostic sea-ice variables and diagnosing
1517      the forcing/external data fields that drive the ocean model,
1518      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1519      The implied surface heat flux is then stored in variable
1520      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1521      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1522      non-local transport term.  Because this call precedes model
1523      thermodynamics, temperature under sea-ice may not be "exactly" at
1524      the freezing point by the time theta is dumped or time-averaged.
1525      N.B.: fairly large differences in accuracy occur across
1526            different platforms/compilers; comparison between
1527            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1528            generated output gives:
1529       T           S           U           V
1530      C D M    c        m  s        m  s        m  s        m  s
1531      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1532      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1533      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1534    
1535      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1536    o GAD:
1537      - generated new common blocks to account for call of
1538        same gad routines with differing traceridentities
1539        (needed to modify tracerIdentity indices in GAD.h)
1540      - generated separate common blocks for case useCubedSphereExchange
1541        (Department of Futurology)
1542      - parameter lists to gmredi_?transport: added tracerIdentity
1543      - added new key indices to tamc.h
1544    o external_fields_load:
1545      - added this routine to TAF list
1546      - needed to make some common blocks global and additional storing
1547        along the same lines as exf package (checkpoint_lev?_directives.h)
1548    o exf:
1549      updated external forcing package
1550      - bug fixes carried over from ecco-branch
1551        (missing OBCS_OPTIONS.h in two routines)
1552      - enable easy to use "no forcing".
1553      - added exf I/O for atmospheric loading
1554      - added exf I/O for runoff data
1555      - transfered scaling between exf <-> MITgcm to exf namelist
1556    o Adding new verification experiment global_with_exf.
1557      This verification experiment is almost identical to the
1558      global_ocean.90x40x15 experiment, except that it uses
1559      the exf (and cal) package instead of the
1560      external_fields_load routine (cf README file).
1561    
1562    checkpoint46m_post
1563    o modified testscript to return -- when there are no lines of "%MON" output
1564    o added new flag "quasiHydrostatic" for QH mode
1565      and new routine quasihydrostaticterms()
1566    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1567      New routine: mom_u_coriolis_nh()
1568    o fixed sign of non-hydrostatic metric terms in u and v equations.
1569      Depend on correct sign of gravitySign.
1570    o added work.pc* to .cvsignore in aim directories using ifc
1571    o introduced flag for controllin non-hydrostatic metric terms
1572    o removed gravitySign from PARM04
1573    o switched to g77/ifc from pgf77 in aim experiments
1574    
1575    checkpoint46l_post
1576    o made convective adjustment work with pressure coordinates:
1577     - changed the direction of k-loop in convective_adjustment.F for the
1578       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1579     - adjusted the reference pressure k-index in convective_adjustment.F
1580     - adjusted the convection condition in convect.F (in analogy to
1581       calc_ivdc.F)
1582     - convective_adjustment no longer computes anything on the halos
1583     - removed the warnings about negative salinity from find_rho.F and
1584       find_alpha.F; instead the new routine look_for_neg_salinity, called
1585       at the beginning of find_rho, find_alpha, and find_beta, does a
1586       check of the entire slice, if CPP-option
1587       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1588    checkpoint46l_pre
1589    
1590    checkpoint46k_post
1591    o fixed the verification/global_ocean.90x40x15 experiment:
1592     - new bathymetry (the world according to A., JMC, and M.)
1593     - new initial fields and forcing fields (*.bin files)
1594     - new POLY3.COEFFS (for the next release one should switch to a full
1595       equation of state: JMD95P or MDJWF)
1596     - fixed several errors and redundancies in the data file
1597     - experiment uses looped cells
1598     - added matlab directory with diagnostic scripts for plotting of output
1599    
1600    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1601     - read AIM physics parameters from a file (data.aimphys)
1602     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1603    
1604    checkpoint46j_post
1605    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1606    o move wVel computation at the end of the time step, in S/R integr_continuity
1607    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1608    o update timeave pkg for wVel diagnostic.
1609    checkpoint46j_pre
1610    
1611    checkpoint46i_post
1612    o Clean up AIM package (and keep the results unchanged):
1613      include CPP_OPTION and use IMPLICT NONE in all routines ;
1614      declare all the variables _RL ; use _d 0 for all numerical constants.
1615      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1616    
1617    checkpoint46h_post
1618    o cleaned up the use of rhoNil and rhoConst.
1619      - rhoNil should only appear in the LINEAR equation of state, everywhere
1620        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1621        and the dynamical equations are all divided by rhoConst
1622    o introduced new parameter rhoConstFresh, a reference density of fresh
1623      water, to remove the fresh water flux's dependence on rhoNil. The default
1624      value is 999.8 kg/m^3
1625    o cleanup up external_forcing.F and external_forcing_surf.F
1626      - can now be used by both OCEANIC and OCEANICP
1627    checkpoint46h_pre
1628    
1629     Added code to convert surface volume flux (fresh water) into
1630     a mass flux when using P coordinates in the ocean (OCEANICP).
1631     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1632    
1633    checkpoint46g_post
1634    o Include a new diagnostic variable phiHydLow for the ocean model
1635      - in z-coordinates, it is the bottom pressure anomaly
1636      - in p-coordinates, it is the sea surface elevation
1637      - in both cases, these variable have global drift, reflecting the mass
1638        drift in z-coordinates and the volume drift in p-coordinates
1639      - included time averaging for phiHydLow, be aware of the drift!
1640    o depth-dependent computation of Bo_surf for pressure coordinates
1641      in the ocean (buoyancyRelation='OCEANICP')
1642      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1643        Theta, Salinity, and Pressure in the parameter list. This routine is
1644        presently contained in find_rho.F. This routine does not give the
1645        correct density for 'POLY3', which would be a z-dependent reference
1646        density.
1647    o cleaned up find_rho
1648      - removed obsolete 'eqn' from the parameter list.
1649    o added two new verification experiments: gop and goz
1650      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1651    checkpoint46g_pre
1652    
1653    checkpoint46f_post
1654    o Enable tangent linear (forward mode) gradient checks:
1655      - extended active file handling to g_... files
1656      - added TANGENT_SIMULATION to theSimulationMode
1657      - extended grdchk package accordingly
1658    o added tangent linear setup in verification/carbon/code_ftl
1659    o added adjoint setup in verification/front_relax/code_ad
1660    
1661    checkpoint46e_post
1662    o Added new equation of state -> MDJWF
1663      - EOS of McDougall et al., 2002, JAOT, submitted
1664      - caveat: the equation of state is only valid for a smaller (more
1665        realistic?) range of values than JMD95P/Z and UNESCO
1666      - added masks to the calculation of pressure in store_pressure
1667      - added more check values for density in check_eos (ini_eos.F), some of
1668        the old check values are out of the range of the MDJWF-eos, so don't
1669        expect perfect matches for those
1670    checkpoint46e_pre
1671    
1672    checkpoint46d_post
1673    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1674      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1675      case of pressure coordinates. eosType='JMD95Z' in
1676      combination with buoyancyRelation='OCEANICP' now causes an error.
1677    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1678      in find_alpha/beta.
1679    checkpoint46d_pre
1680    
1681    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1682      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1683    
1684    checkpoint46c_post
1685    o Changes necessary for ocean in p-coordinates
1686     -  Added new buoyancy relation = 'OCEANICP'
1687     -  Added new parameters = gravitySign (this used to be contained inside
1688        the factor dRdZ which I added when we first switched to R coordinates).
1689     X GM/Redi is not compatible (yet)
1690     X bottom drag and no-slip need to be debugged.
1691    checkpoint46c_pre
1692    
1693    checkpoint46b_post
1694    o Added new equation of state -> JMD95Z and JMD95P
1695      - EOS of Jackett and McDougall, 1995, JAOT
1696      - moved all EOS parameters into EOS.h
1697      - new routines ini_eos.F, store_pressure.F
1698    o Added UNESCO EOS, but not recommended because it requires
1699      in-situ temperature (see JMD95)
1700    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1701      unesco.f to be used with POLY3
1702    checkpoint46b_pre
1703    
1704    checkpoint46a_post
1705    o Added (atmospheric) pressure loading
1706      - new field in FFIELDS.h, etc...
1707      - new cpp flag ATMOSPHERIC_LOADING
1708    o Changed hFacC to _hFacC in calc_phi_hyd.F
1709    o Added SHORTWAVE_HEATING to some files for consistency
1710    checkpoint46a_pre
1711    
1712    checkpoint46
1713    further merges from release1_p5
1714    o new ctrl package
1715      - adopted from ECCO environment to enable optimization
1716      - added Eliassen Palm fluxes to controls
1717    o added Eliassen Palm flux controls to gradient check package
1718    o cost package
1719      - Compatible with new ctrl package
1720      - added Eliassen Palm cost hooks
1721      - modif's of existing cost functions
1722    o Adjoint-related bug fixes in kpp:
1723      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1724      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1725    o autodiff package
1726      - flow directives:
1727        + new for S/R do_the_model_io
1728        + enhanced for S/R checkpoint
1729        + new gmredi.flow
1730      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1731        disable adcommon.h/g_common.h by default.
1732      - fixed problem for adjoint of global_max
1733    o modified verification/carbon/
1734    o New setup for adjoint of global_ocean
1735    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1736    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1737    o incorporated hooks for sponge layer code (external_forcing.F)
1738    
1739    checkpoint45d_post
1740    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1741    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1742      (affects plume_on_slope "cg2d" output)
1743    o add new parameter deltaTfreesurf for free-surface time stepping
1744    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1745    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1746    o change phiMin in exp1 (to agree with documentation)
1747    o add new flags:
1748     - T,S forcing inside/outside Adams-Bashforth
1749     - turn off temp,salt advection and/or forcing
1750     - for each tracer, define internal flag for multiDimAdvection & A-B
1751    o monitor: change definition of KE to check conservation of Energy
1752    
1753    checkpoint45c_post
1754    o Removed f90 comments ("!")
1755    o Modified initialisations to enable exf package for MITgcm
1756      (without invoking ECCO_PACKAGE).
1757    o modifications to gradient check package (Martin Losch)
1758      - enable centered differences
1759      - modified format of standard output
1760    
1761    checkpoint45b_post
1762    o cleaned exchange calls in cg2d
1763    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1764    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1765      to configure barotropic setup (Martin Losch)
1766    o moved some initialisations within bi,bj loop in dynamics
1767      (TAF flow dependency)
1768    o in initialise_varia, moved call packages_init_variables
1769      before convective_adjustment_init
1770      (corresponding adjustment of TAF tape initialisation).
1771    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1772    
1773    checkpoint45a_post
1774    o compute Rho over the whole domain (extend iMin,jMin indices)
1775    o specific exchange for X-slice domain (case Ny=1)
1776    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1777    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1778    
1779    checkpoint44h_post = checkpoint45
1780    o Fix to restore differentiability:
1781      place at which packages_init_variables is called in
1782      initialise_varia is crucial for reverse control flow.
1783    o modifications in GMRedi to enable stable adjoint
1784      (corresponding modif's in thermodynamics, dynamics)
1785    o added missing hook for sponge layer code in external_forcing
1786    o modified test cost functions
1787    o storing in gad_advection (plus removal of write(0,*)!
1788    o missing headers TR1.h added in convective_adjustment routines
1789    o errorMessageUnit set non-equal zero in eeboot
1790      (conflict on some platforms, e.g. IBM SP3)
1791    o modified carbon verif.
1792    
1793    checkpoint44h_pre
1794    o vertical grid option: allow to put the Interface at the middle between
1795      2 cell-centers ; replace delZ in pkg/kpp by drF.
1796    o GM Advective form: Tracers are advected using the residual transport (=
1797      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1798    
1799    checkpoint44g_post
1800    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1801      results) ; ifdef missing in thermodynamics.F
1802    
1803    checkpoint44f_pre,checkpoint44f_post
1804    o added PTRACERS package
1805      This allows an arbitrary number of passive tracers to be integrated
1806      forward simultaneously with the dynamicaly model.
1807      + Implemented so far:
1808        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1809        - I/O and checkpointing
1810        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1811      + Not implemented so far:
1812        - KPP
1813        - OBCS
1814      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1815        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1816        line in data.pkg.
1817      + This package is disabled by default since it increases storage.
1818    
1819    
1820    o testscript: added -cleanup option
1821    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1822                 b) enable to filter 2D fields.
1823    
1824    checkpoint44e_pre,post
1825    o re-wrote convective adjustment to use pre-calculated weights
1826      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1827      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1828      Original calls to convect() still in place.
1829    
1830    chkpt44d_pre,post
1831    o added missing EXCLUDE_MONITOR flags
1832    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1833      (incompatible typ in MIN/MAX expressions caused problems
1834      on IBM SP3)
1835    o in genmake added variable MAKEDEPEND
1836      plus resetting for case SunOS
1837    o added timer_stats.c routine for IBM SP3
1838    o removed variables in dynamics
1839    !!! I forgot to create tag chkpt44d_pre !!!
1840    !!! But chkpt44d_pre = chkpt44c_post    !!!
1841    
1842    o real fresh water flux implemented with non-linear free-surface.
1843    
1844    chkpt44c_pre,post
1845    o few fix (mask in shap_s2, EmPmR in external_field_load,
1846      USE_NATURAL_BCS in solve_for_P);
1847    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1848    
1849    checkpoint44b_pre/_post
1850    o merge of relevant stuff from the ecco-branch:
1851      - genmake: removed $S64 overwrite for case SunOS
1852      - pkg/exf: update and corrections for field swapping and obcs
1853      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1854                  harmonized between ECCO and MITgcm
1855      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1856                      updated checkpointing_lev... lists for obcs
1857      - model/src: minor changes in forward_step, plot_field
1858                   added directive for divided adjoint in the_main_loop
1859      - pkg/mdsio: added mdsio_gl_slice
1860    
1861    o check parameters & config (chkpt44a_pre,post)
1862    o OBC and NonLin_FrSurf.
1863    
1864    checkpoint44
1865    o fix bug in mom_vi_del2uv
1866    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1867    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1868    o update AIM experiments (NCEP input files)
1869    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1870    o added some stuff for AD
1871    
1872    checkpoint43
1873    o added two new advection tests
1874    o added global 4x4 degree ocean test
1875    o added test of H&S94 with free surface on cube
1876    o some final mods for gradient check, adjoint,...
1877    
1878    checkpoint42
1879      Fixed AD-related problems:
1880    o Store directives up-to-date with re-arranged Adams-Bashforth
1881      (mainly thermodynamics.F)
1882    o New store directives for multi-dim. advection schemes
1883      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1884      * new common block and key passkey
1885      (mainly gad_advection.F)
1886    o Modified store directives for split of dynamics/thermodynamics
1887      for the case ALLOW_KPP
1888    o Cleaned argument list for timestep_tracer.F
1889    
1890    checkpoint41
1891    o re-formatted/added comments in prologues of key subroutines
1892      to work with protex
1893    
1894    checkpoint40
1895    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1896    o added FLT (floats) package from Arne along with demo. experiment
1897    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1898      implementation of forward-in-time forcing terms
1899    o more mods for non-linear free-surface including new variable
1900    o modified multi-dim method to work on cube
1901    o bug fix in KPP (from DM)
1902    
1903    checkpoint40pre9
1904    o added DST advection schemes
1905    o fix MPI bug on SGI's
1906    o modifications for non-linear free-surface
1907    o fixed conditionals for fixed flow/passive tracer only mode
1908    o added tension/strain form of stress tensor
1909    o changes to commenting of arguments for TAF/TAMC
1910    o added/updated many matlab scripts
1911    o added multi-dimensional advection method for tracers
1912      
1913    checkpoint40pre8
1914    o new package rw/
1915      Added method for dumping intermediate local arrays:
1916      mdsio_writetile - same as mdsio_writefield except works from inside
1917                        bi,bj loop
1918      mdsio_writelocal - same as mdsio_writetile except works for local
1919                         arrays
1920      write_local_r? - higher-level wrapper for mdsio_writelocal
1921      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1922      Example given at end of mom_vecinv.F that dumps some local arrays.
1923    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1924      control flux-form versus vector invariant code.
1925      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1926      or genmake -DISABLE ...
1927    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1928      (additional storing is now needed for case vecinv;
1929      currently nothing implemented to switch this storing off
1930      in case fluxform is used since no CPP flag available).
1931    
1932    checkpoint40pre7
1933    o bug fix in dynamics.F
1934      calc_viscosity called before k=1,Nr loop.
1935    o added some #ifdef's ALLOW_PASSIVE_TRACER
1936    o cleaned initialisations in ctrl_map_ini
1937      related to TAF
1938    
1939    checkpoint40pre6
1940    o split dynamics into thermodynamics & dynamics
1941    o corresponding split of calc_diffusivity into
1942      calc_diffusivity, calc_viscosity
1943      (kpp_calc_diff, kpp_calc_visc).
1944    o Added diffkr, kapgm to control variables
1945    o bug fix in gmredi_slope_limit for ldd97
1946    
1947    checkpoint40pre5
1948    o proper initialization of Adams-Bashforth time stepping
1949      + uses forward step for very first step of model (iter=0)
1950    o re-generated *all* output since almost all output is modified by this
1951      change (sorry but we've been putting this one off for about 2 years)
1952      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1953        *not* regenerated since they are already out of date and I don't
1954        want to create the impression that they are suddenly working.
1955    o removed KAP stuff for DEC's
1956    o modified/added many .cvsignore files in */code and */input
1957    o added new expt "solid-body.cs-32x32x1"
1958      + this uses an alternative form of ini_curvilinear_grid.F which
1959        is not necessarily any better than the current one...
1960    
1961    checkpoint40pre4
1962    o added re-initialisations of utrans,vtrans,rtrans in
1963      calc_common_factors which are crucial for TAF.
1964    o extended iMin,jMin range for calc_common_factors,
1965      calc_diffusivity
1966    o added option ALLOW_PASSIVE_TRACER
1967    o a few minor updates and fixes
1968    
1969    checkpoint40pre3
1970    o created calc_gtr1.F for gad package
1971    o split the_main_loop and re-introduced forward_step
1972    o some recomputations of nIter0 for TAMC
1973    
1974    checkpoint40pre2
1975    o Updated to latest branch of AJA, JMC
1976    o Added gradient check package
1977    o Added routines for passive tracer handling
1978    o Added carbon sequestration sensitivity experiment
1979    
1980    checkpoint39
1981     o Modifications and fixes to support TAMC
1982       (mainly missing or wrong directives)
1983     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1984       in addummy_in_stepping
1985     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1986     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1987     o Included following packages:
1988       cal: calendar
1989       exf: external forcing
1990       ecco: essential routines to control use of cal, exf
1991             (NB: this is not the full ECCO environment)
1992     o disabled some packages by default in genmake
1993    
1994    checkpoint38
1995     o see notes_c37_adj.txt
1996     o corrected wrong layer index in external_forcing_t
1997     o replaced the_main_loop/forward_step by the_main_loop
1998     o removed forceoutput from write_state
1999       (replaced criteria for initial/final state)
2000     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2001    
2002    checkpoint37
2003     o mdsio.F routine split and packaged in pkg/mdsio
2004       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2005        used unless genmake -disable=mdsio)
2006     o allow a more precise surface-geopotential gradient for the atmosphere
2007       taking into account the change in space of Alpha (=1/rho) at the surface.
2008     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2009       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2010     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2011       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2012       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2013     o Time-Average diagnostics defined as a pseudo package "timeave".
2014     o pickup files : old pickup (before c35) did not work with new code (c35
2015       and after) unless activating 2 commented lines in initialise-varia.
2016     o Non-Hydrostatic pickup file Pb fixed.
2017     o bug with Rigid-lid version (since c35) fixed.  
2018    
2019    checkpoint36
2020     o implement Crank-Nickelson barotropic time-stepping
2021     o recover Time-Average diagnostics
2022     o fix Pb in checkpoint (PR#19)
2023     o AIM become a standard package ; clean unused CPP_kees
2024    
2025    checkpoint35
2026     o subtantial rewrite of dynamics.f
2027     o allows staggered time-stepping
2028     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2029     o added bottom drag (linear + quadratic)
2030    
2031  checkpoint34  checkpoint34
2032   o Modified exchange routines for correct reverse simulation.   o Modified exchange routines for correct reverse simulation.
2033   o Added verification output to comply with bug fix in impldiff.F   o Added verification output to comply with bug fix in impldiff.F

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