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revision 1.127 by adcroft, Thu Jan 30 18:35:42 2003 UTC revision 1.413 by edhill, Tue Dec 14 23:00:53 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o changes per discussion of AM, JMC, & EH3 today:
7      - move redundant "grid" variables out of "state" -- in preparation of
8        creating proper CF-style coordinate variables and in recognition
9        that any/all grid variables can be easily copied (eg. w/NCO) from
10        the grid files into any of the other NetCDF files
11      - *always* output grid variables with MDSIO (this will eventually be
12        changed)
13      - output MNC grid file if useMNC is true
14    o every instance of _END_MASTER() has been found and replaced with
15      _END_MASTER( myThid ) in order to satisfy certain picky Sun
16      preprocessors
17    o re-arrange diagnostics pkg initialisation:
18     - allow each package to extend the available diagnostics list
19     - add some checking and fix small problems (multi-threaded, ...)
20     - new S/R diagnostics_fill (replace fill_diagnostics):
21       look through the short list of active diag. (instead of the long list)
22       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
23    
24    checkpoint57a_post
25    o this set of changes restores TAMC compatibility
26      tested for global_ocean.90x40x15 adjoint on trough
27      (what a pain)
28    
29    checkpoint57a_pre
30    o some modifs in tools/build_options for sunos
31    o call ctrl_pack for ctrl at end for optimcycle=0
32    
33    checkpoint57
34    o add horizontal bi-harmonic viscosity for vertical velocity
35      - new parameter viscA4W (defaults to viscA4)
36      - affects only non-hydrostatic code
37      - to be done: no-slip lateral boundary conditions
38    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
39    o implement Implicit Vertical advection for pTracers
40    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
41      (implemented also for implicit vertical diffusion & advection)
42    o OBCS: extend application of tracer open boundary conditions
43      to a strip beyond the boundary of width Olx/Oly
44    o add call monitor to TAF set of required calls (flow directives)
45      and include in natl_box_adjoint
46    o untangle a few ifdefs related to cost, ctrl, autodiff
47      untangel a few ALLOW_ECCO_OPTIMIZATION
48    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
49      (theta2, salt2 in ecco_cost_weights)
50    
51    checkpoint56c_post
52    o OBCS as control variables
53      - update ctrl_ad_diff.list, obcs_ad_diff.list
54      - remove balance of obcs controls from default
55      - fix index bug nobcs in ctrl_init
56      - fix dummy fields filen in ctrl_pack
57      - add dummy weights for obcs
58    o lsopt: comment out fort.94 output
59    o optim:
60      - remove unnecessary header files
61      - adjusted namelists
62      - add xerbla.F to Makefile
63    o exf:
64      - multiple modifications of exf_check_range
65      - unit change in exf_init_runoff from [m/year] to [m/s]
66    o mdsio:
67      - i/o-vector change debugLevel from debLevA to debLevB
68    
69    checkpoint56b_post
70    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
71      is called from DO_THE_MODEL_IO
72      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
73      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
74      - clean up PTRACERS_WRITE_TIMEAVE a little
75    o add another verification experiment that tests both the cfc-pkg and
76      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
77      reactive tendencies treated inline with regular timestepping
78    o testreport previously did a lousy job of comparing small numbers, so
79      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
80      implemented in the little c-progam tmp_cmpnum.c which is embedded in
81      testreport.
82    o ptracers_monitor: bug fix for MPI
83    
84    checkpoint56a_post
85    o GCHEM: finish reorganizating the package
86      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
87        (introduces another 3D-array for each passive tracer, but only if
88        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
89        gchemTendency is not needed because the timestep is done separately)
90      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
91      - GCHEM is now---more or less cleanly---separate from PTRACERS
92      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
93        so clear to me how that should be done in a general way.
94    o CFC: improve formatting of output in CFC_ATMOS
95    o PTRACERS:
96      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
97        that ALL experiments with ptracers enable can be checked. This makes
98        GCHEM_MONITOR obsolete.
99      - include a runtime parameter PTRACERS_monitorFreq that defaults to
100        monitorFreq
101      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
102    o add PTRACERS (PTR0[1-5]) to testreport output
103    o exf_check_range:
104      * default changed to .TRUE.
105      * will check values for niter0 if debLevA, every timestep if debLevB
106      * STOP in exf_check_range if 'out of range'
107      * range chosen generous to allow for potential extema
108      TBD: a version with stricter range
109           permitted range would be runtime parameters
110    o GMredi:
111      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
112      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
113      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
114    o GCHEM:
115      - move call to GCHEM_FORCING_SEP, so that it is now called before
116        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
117      - introduced a useGCHEM runtime flag and applied it everywhere.
118      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
119        this flag is now only visible within GCHEM-pkg routines.
120      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
121        be replaced by a 3D array that is computed before thermodynamics; for
122        this, the tracer ID iTracer had to be included into the parameter list
123        of ptracers_forcing
124      - set up forward_step to call gchem_forcing, that will replace
125        gchem_forcing_int in ptracers_forcing
126      - cleaning up
127    o small cleaning of exch2: remove files that are also in eesupp/src
128    
129    checkpoint56
130    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
131    o mnc: cleanup "full" files--fixes out-of-memory problem
132    o ECCO-GODAE
133      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
134      * fully merged and updated from SIO code
135        windstress sign change affects
136        - exf_inscal_[u/v]stress
137        - sign of xx_tau[u/v] adjustments
138        - signs in cost_scat
139      * ctrl_get_gen: avoid update of tau[u/v] for first few days
140      * natl_box_adjoint updated and compressed
141      * 2-level checkpoint switch added
142        (tested in EXP. 1 of natl_box_adjoint)
143      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
144    o SVD
145      * first complete, non-hacked version for SVD calculations
146      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
147        performed via direct access files admtlm_vector.it????
148        (via ctrl_[un]pack)
149      * optimcycle is used for ARPACK iteration counter
150        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
151      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
152        and add linear transforms where necessary
153      * controls are initial/final SST, SSS (can be extended; need to check
154        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
155    o mdsio: filename info to both stderr, stdout
156    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
157      from sign change
158    
159    checkpoint55j_post
160    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
161      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
162    o add consistent build directories and .cvsignore files to verification
163    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
164    o make all subroutines 30 or less characters in length for certain older
165      compilers to work (a thorough search only turns up two routines in
166      pkg/ptracers)
167    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
168      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
169    
170    checkpoint55i_post
171    o change arrays for total vertical diffusivity (2.D if explicit,
172      3.D if implicit) ; each ptracer uses its own background value.
173    o added mnc/NetCDF output capability to ocn_compon_interf
174      - added bits to verification/cpl_aim+ocn so that it can run on
175        ITRDA and other clusters without the mpirun "-wd" option
176    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
177      configuration
178    o give MNC the ability to create additional files rather than
179      exceeding a specified file size limit "MNC_MAX_FILESIZE"
180      - the default is just less than 2GB which is a practical limit
181        on many systems
182    o Compute the non-local term using either KPP vertical diffusivity (=default)
183       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
184    
185    checkpoint55h_post
186    o add verification test "vermix"
187    o remove all the *_ioinc flags and replace with the single global
188      outputTypesInclusive flag
189    o allow to set a vertical profile of vertical diffusivity for T & S
190    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
191    o useMNC moved from data.mnc to data.pkg
192    
193    checkpoint55g_post
194    o Renaming carbon AD experiments to comply with testreport conventions
195    o Updating adjoint of Held-Suarez hs94.1x64x5
196    o Fixing directives for non-ECCO forward_step, after ECCO directives
197      have been fixed to avoid recomp. of do_oceanic_phys
198      Works well for global_ocean.90x40x15,
199      but recomp. issue remains for carbon
200    o Updating adjoint output for natl_box_adjoint after
201      pkg/ecco has been modified (see taga c55d_post)
202    
203    checkpoint55f_post
204    o rename to timeave_init_fixed
205    
206    checkpoint55e_post
207    o some delicate re-shuffle of store directives to avoid one
208      extra call of do_oceanic_physics
209      affects ecco_the_main_loop.F, do_oceanic_physics.F
210      checkpoint_lev1_directives.h
211    o NB: this may break global_ocean adjoint temporarily,
212      but it is clear how to fix it. Will do later, need this now.
213    
214    checkpoint55d_post
215    o ECCO specific cost function terms (up-to-date with 1x1 runs)
216    o ecco_cost_weights is modified to 1x1 runs
217    o modifs to allow observations to be read in as
218      single file or yearly files
219    o enable to read exf forcing fields as either
220      single file or yearly files (flag useExfYearlyFields)
221    checkpoint55d_pre
222    
223    o switch between 2-level and 3-level checkpointing
224    o add ability of MNC to write local and "partial" (eg. 2D slices where
225      the full 3D field is never actually stored) arrays to NetCDF files
226      with the correct (that is, the complete multi-dimensional) set of
227      array indicies
228      - used in mom_vecinv() to write the diagFreq output
229      - tested (demonstrated) in verification/aim.5l_cs
230    o further mnc-ification
231      - add verification/lab_sea to the list with mnc setups
232      - fix undefined mnc v-names in cd_code
233      - add kpp to mnc output (both snapshot and timeave)
234    o non-hydrostatic code
235      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
236        in calc_gw.F
237      - defaults to viscAh
238      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
239        friction or Leith) in non-hydrostatic mode, as long as there is
240        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
241    o pkg/cost
242      extend simple cost functions to treat time mean quantities
243      (T,U,V) via cost_accumulate_state from cost_tile
244    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
245        be 2 times larger than the minimum size the advection scheme requires.
246        now get a perfect conservation of salt in advect_cs test-exp (updated)
247    o GGL90 (Gaspar's TKE mixed layer)
248      - add horizontal diffusion of TKE, requires exchanges in
249        do_fields_blocking_exchanges, horizontal diffusivity is zero by
250        default. In OPA there is no horizontal diffusion of TKE but the
251        mixing coefficients are computed from a horizontal average of TKE of
252        6 points or so. I think that diffusion has a little more physical
253        justification.
254      - clean up ggl90_calc in the hope of reducing memory usage (this hope
255        was in vain)
256      - mask tke-variable in ggl90_init
257    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
258    o fix biharmonic diffusion on CS-grid.
259    o more obcs stuff
260      - added obcs_external_fields_load as an alternative to the EXF-pkg option
261        for reading boundary values. This routine is called from
262        obcs_prescribe_read
263      - updated obcs_check
264      - changed sponge layer relaxation parameter units for days to seconds
265      - turned off sponge layer by default
266      - changed argument list of OBCS_CALC to myTime+deltaTclock
267      - fixed about 35 bugs in obcs_external_fields_load
268    
269    checkpoint55c_post
270    o obcs stuff
271      - new runtime flags useOBCSprescribe, useOBCSbalance
272      - re-arranged obcs_calc
273      - moved exf_getobcs to obcs_prescibe_read
274        obcs_prescibe_read is called after ORLANSKI stuff
275        and independent of it (executable can contain all).
276      - updated obcs_check
277      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
278        These may be necessary only if tangential velocities are
279        prescribed at OB, not sure, needs testing.
280    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
281      which simplifies the calls and passes the ifc check-bounds test
282    
283    checkpoint55b_post
284    o add a 2D scalar, Z location, exchange_2 routine.
285    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
286      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
287      affects advect_cs results (for the wrong reason): update output.txt
288    o use a more standard discretization for biharmonic viscosity ;
289     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
290      affects results of dome set-up: update output.txt
291    o fix gad_advection.F (CubedSphere part), back to version 1.23
292    o fix bug in mom_vi_del2uv.F (CubedSphere part).
293    
294    checkpoint55a_post
295    o merged code to
296      * prescribe/read time-dependent open boundaries
297        (works in conjunction with exf, cal)
298      * sponge layer code for open boundaries
299      * each boundary N/S/E/W now has its own CPP option
300        (healthy for the adjoint)
301    
302    checkpoint55
303    o up-to-date adjoint of previous breaks
304      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
305      - global_ocean_ebm: adjoint still needs fix (TLM ok)
306      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
307      - carbon: * remove tr1-related adjoint verification
308                * add ptracer as control variable
309    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
310      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
311    
312    checkpoint54f_post
313    o in verification/carbin/ remove experiment related to
314      ALLOW_PASSIVE_TRACER (array tr1 etc)
315      code_ad/ input_ad/ results_ad
316    
317    o add two new packages
318      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
319        + subject to optimization (memory)
320      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
321        + subject to reordering (many GOTOs in the original code)
322        + so far opps is called for every (i,j) point, and then operates in
323          the vertical; one may want to reorder the scheme in order operate in
324          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
325          fields)
326    o overhaul of IO so that we now have flags for MDSIO and/or MNC
327      - all verification tests compile and run with linux_ia32_g77
328      - defaults are compatible with current input files--nothing
329        should change if you were not previously using MNC
330      - MNC output has been added in numerous places (eg. timeave)
331        but there are still a few writes not yet do-able with MNC
332        (this is in progress)
333      - flags now allow for either/or/both use of MDSIO and MNC and
334        documentation will soon follow
335      - numerous small formatting cleanups for ProTeX
336    o add version info (via BUILD_INFO.h) to MNC and stdout
337    
338    checkpoint54e_post
339    o add two new packages
340      - pp81 (Packanowski and Philander, 1981), Richardson number and
341        stratification dependent mixing
342      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
343      - these scheme operate in a similar manner as KPP (without ghat, of
344        course), however there is only one diffusivity that is used for both
345        temperature and salinity (and passive tracers)ç
346    o add offline package
347    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
348      provided by Stephanie Dutkiewicz
349    o genmake2: add ability to search for C compilers and cleanup test output
350      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
351    
352    checkpoint54d_post
353    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
354    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
355      leading to additional shift by 5 days each year of integration
356       (i.e. leading to considerable offset over the years)
357    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
358    o start with no AB and no initial filtering (staggerTimeStep):
359      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
360    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
361      (external loading & cpl import/export stay in forward_step.F)
362    o update coupling interface to work with new staggerTimeStep
363    o change MDSIO ptracers_pickup.
364    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
365    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
366    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
367    
368    checkpoint54c_post
369    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
370      this affects (truncation error) output.txt of test-exp:
371       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
372    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
373    o change Qnet to always be the net heat flux, (+upward).
374      affects (truncation error) output of natl_box exp.: updated
375    o define the max number of passive tracers in PTRACERS_SIZE.h
376    o start to test mnc routinely in exp0
377    o add sea-ice loading (sIceLoad) as a new forcing field.
378    
379    checkpoint54b_post
380    o add testreport "-j JOBS" option for parallel builds (tested and pretty
381       impressive on Altix and Opteron systems)
382    o diagnostics can now write NetCDF files through the mnc package
383    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
384    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
385    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
386      affects (truncation error) output of lab_sea & natl_box exp.: updated
387    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
388    
389    checkpoint54a_post
390    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
391    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
392    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
393    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
394      + internal_wave (shift in writing cg2d_ini_res)
395    checkpoint54a_pre
396    
397    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
398      - modified verification/lab_sea and natl_box_adjoint accordingly
399    
400    checkpoint54
401    checkpoint53g_post
402    o prepare splitting of thermodynamics: store convect.counter in common block
403    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
404      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
405    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
406    o new parameter "nShapS": allow to treat differently S from T (nShapT)
407    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
408    o restore adjointability
409    
410    checkpoint53f_post
411    o modifications that affect AIM experiment results (update output.txt):
412      - no advection of S at top interface Nr (pkg/generic_advdiff)
413      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
414    o AIM pkg:
415      - include stability function into surf.Flux derivative relative to Tsurf
416      - calculate clear-sky radiation & surface temp. change (for diagnostics)
417    
418    checkpoint53e_post
419    o merged cylindrical coord configuration
420    o added rotating_tank experiment
421    checkpoint53e_pre
422    
423    checkpoint53d_post
424    o faulks upgraded: re-generate output.txt that have changed:
425       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
426    o Added Bryan and Lewis, 1979, vertical diffusivity profile
427    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
428    o added Sadourny discretization of Coriolis
429      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
430      - re-enabled use of omega3 (useAbsVorticity)
431    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
432      vector-invariant equations
433      - note: does *NOT* yet use same variable visc. for no-slip BC's.
434    o recoded the lateral boundary conditions for non-hydrostatic w, this time
435      hopefully without new bugs
436      - still to do: biharmonic friction for non-hydrostatic w
437    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
438    o regenerated output for global_ocean_ebm (using -ieee)
439    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
440      of mom_common/
441      - simple re-arrangement of instructions within computing loop
442    checkpoint53d_pre
443    
444    checkpoint53c_post
445    o new version of coupler for AIM+thSIce and Ocean models
446     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
447     - land: change Evaporation of snow
448     - aim with thSIce: fix bug in snow-precip.
449    o changes to calc_gw.F
450     - bug fix for w^2 term near the bottom boundary
451     - (hopefully) improve the lateral slip boundary condtions for use with
452        partial/looped cells
453      - because the bug fix changes two verification experiments anyway (exp5
454        and plume on slope), change the lateral boundary condition from half slip
455        to the value of no_slip_sides
456    o ebm package wasnt quite up to the parallel task. Fixed that.
457    o Adjoint of EBM package + verification
458      * TLM OK
459      * ADM not sufficient accuracy yet (needs further testing)
460    
461    checkpoint53b_post
462    o Commiting new energy balance model to repository
463      * package is pkg/ebm
464      * verif. is verification/global_ocean_ebm
465      * references are in ebm_driver.F
466    C      * X. Wang, P. Stone and J. Marotzke, 1999:
467    C        Global thermohaline circulation. Part I:
468    C        Sensitivity to atmospheric moisture transport.
469    C        J. Climate 12(1), 71-82
470    C      * X. Wang, P. Stone and J. Marotzke, 1999:
471    C        Global thermohaline circulation. Part II:
472    C        Sensitivity with interactive transport.
473    C        J. Climate 12(1), 83-91
474    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
475    C        Destabilization of the thermohaline circulation
476    C        by atmospheric eddy transports.
477    C        J. Climate 7(12), 1870-1882
478    o Will need long integration testing.
479    checkpoint53b_pre
480    
481    o created pkg/mom_common in preparation for variable viscosity code
482    o renamed and split ini_mnc_io
483    o pkg/land: only liquid water can diffuse or run-off
484    o AIM using land: soil wetness availability account for snow
485    o added printMapIncludesZeros to EEPARMS namelist
486    
487    checkpoint53a_post
488    o restore TAMC compatiility for exf_constants.h
489      (no usage of _d in .h)
490    o Additional storing in KPP in an attempt to fix
491      TAMC problem with adjoint of KPP code.
492      (no success...)
493      Identical code works fine with TAF.
494    o Fixed verification/natl_box_adjoint experiments.
495      Initial conditions for Experiments 4 and 5 are now
496      set to "SEAICE_initialHEFF=0", which is more reasonable,
497      and hence gives results closer to that of Experiment 2.
498      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
499    
500    checkpoint53
501    o stable checkpoint with up to date adjoint
502      TLM tests only run for 1st grdchk at the moment. Its unclear if
503      this is a code problem or a problem with resetting code for g_
504      variables that is being autogenerated wrong.
505      Otherwise:
506       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
507       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
508         are both still in chaos following their security messes.
509    
510    checkpoint52n_post
511    o various build (mostly genmake2) changes including:
512      - ability to build/run more easily within Cygwin and MacOS X
513      - more complicated Makefiles with a stronger dependence on Gnu Make
514    o pkg/seaice modifications
515      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
516        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
517        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
518      - changed proxy for geostrophic velocity and updated
519        verification/lab_sea/results/* accordingly
520      - removed ADI dynamic solver from pkg/seaice
521      - replaced all occurrences of 1/CSTICE or 1/CSUICE
522        they caused a segmentation fault under certain circumstances
523      - removed unused field WATR
524    o bug fix in exf-package:
525      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
526         now reflect that.
527    o small fixes in the cal-package:
528      - set reference date to first of January for the 'model'-calendar
529      - failing of cal_CheckDate in cal_FullDate now actually results in a
530        warning
531    o small modifications in exf-package to increase flexibility:
532      - change climtempfreeze from a constant to a runtime parameter that
533        is specified in data.exf_clim (default = -1.9)
534      - introduce runtime parameter windstressmax (default = 2.0) that is
535        specified in data.exf
536    o fix in pkg/thsice:
537      - update Evap (Tsf changes) to be consistent with Latent heat flux
538      - maintain snow precipitation unchanged (even if Tsf >=0).
539     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
540    
541    checkpoint52m_post
542    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
543      this does not change any of the results, because myIter=0 in swfrac always
544      lead to jwtype=2 (the default anyway), but the call makes little sense
545      as a default
546    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
547    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
548      atmospheric model (AIM) to use it ; add a "slab ocean" component.
549    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
550    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
551    o extending useSingleCpuIO option to work with new exch2 I/O format
552      - old-style, missing-tile I/O is still accessible by defining CPP
553        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
554    o monitor package can write to NetCDF files and/or STDOUT
555    o fix re-definition bug in MNC_GRID_INIT_ALL()
556    o doc/api_reference added
557      - a framework for building an API Reference Manual using all
558        the "protex" comments embedded in the code
559      - see pkg/generic_advdiff, pkg/mnc for examples
560    o MNC:
561      - make myThid the last argument for all subroutines
562      - new default for the grid files: NO halos
563      - add useMNC and other run-time flags
564      - separate per-file-group handling of the unlimited dimension
565      - early initialization of MNC w/ flags read at the eeboot stage
566        and lookup tables set in initialize_fixed
567      - write all MNC output to a freshly-created directory
568    o thermodynamics sea-ice (thsice) is now tested with testreport.
569    o test exp. advect_cs: use the standard cs32 grid ; update output.
570    o Added functionality to grdchk:
571      pick global i,j,k position (or nearest wet) where to perform check.
572    
573    checkpoint52l_post
574    o new land formulation:
575      a) use ground enthalpy as prognostic variable to ensure exact
576         energy conservation.
577      b) account for water temperature and for latent heat of freezing
578         in all processes (rain, run-off, ground storage)
579      c) compute surface and ground temperature implicitly.
580    o aim_v23 modification for new land model:
581      a) Treat separately land / ocean / sea-ice surface fluxes
582         to allow implicit computation of land & sea-ice surface temp.
583      b) add snow precipitation.
584    checkpoint52l_pre
585    
586    o fix problem (when 1 tile is empty) in min/max monitor.
587    o fix bug in timeAve (u,vZetatave in common block)
588    o no restoring terms under ice for pkg/seaice
589    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
590    o bug fix for pkg/seaice pickups
591    o change MNC call locations and add coordinate attributes
592    o mask vorticity at the corner ; affects global_ocean.cs output
593    o fix ini_curvilinear_grid ; test CS experiments with mpi
594    o aim.5l_cs: modify sea-ice fraction input file ; update output
595    o exf: Adding simple range check routine for exf fields after read
596    
597    checkpoint52k_post
598    o removed top-level directory "diags"
599      - we migrated these functions to pkg/timeave a long time ago
600    o fixed bug introduced in pkg/monitor
601    o accuracy ctrlprec = 32 insuffient for gradient checks using
602      averaged fields (I/O via cost_averages)
603      -> use ctrl.h in active_file*.F to control I/O precision.
604    o paramter list of CALL ADTHE_MAIN_LOOP
605    o added initial do_the_model_io to ecco
606    o set all ...Freq to zero after cost_final
607      taveFreq, dumpFreq, pChkptFreq
608    o MAIN and ECCO differentiability restored
609    
610    checkpoint52j_post
611    o fix nchklev in tamc.h for global_ocean...
612    o Bringing flow and store directives up-to-date
613    o Really weird thing!
614      call do_the_model_io from the_main_loop with parameters
615      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
616      TAF places a faulty re-call of initialise_varia
617      after cost_final call which should not be there!
618    checkpoint52j_pre
619    
620    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
621      error messages
622    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
623    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
624      debug output
625    o modfied mdsio_writefield.F to handle non-global files under exch2
626    o update AIM Cubed-Sphere exp (aim.5l_cs):
627      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
628    o update AIM Equatorial Channel exp:
629      use standard aim_v23 pkg and change the SST fields to be more realistic.
630    o globalFile now works with exch2
631    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
632      mon_vort3.F to make exch2 friendly with >1 tile per cube face
633    o limit timeave output for hi-res integrations
634    
635    checkpoint52i_post
636    o removed CPP_EEOPTIONS.h from verification/*/code
637    o updated the tiling for global_ocean_pressure
638    checkpoint52i_pre
639    
640    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
641      the old pkg/aim).
642    
643    checkpoint52h_pre
644    o shortened offending lines in exch2_send_rx?.template
645    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
646    o genmake2: add build & execute test for NetCDF code
647    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
648      old grid files, moved CPP_EEMACROS.h to pkg/exch2
649    o added useSingleCPUIO flag to monitor.F and mon_out.F
650    o added temporary hack for sea-ice dynamics on the cube:
651      metric terms are ignored and it is assumed that
652      there is no sea-ice on cube faces 1, 2, 4, and 5.
653    
654    checkpoint52f_post
655    o added exch2 cube routines to pkg/exch2
656    o modified hs94.cs-32x32x5 to use it
657    o added new grid files to hs94.cs-32x32x5
658    checkpoint52f_pre
659    
660    checkpoint52e_post
661    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
662      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
663    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
664      to work with implicit vertical advection and AB ;
665    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
666    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
667     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
668    checkpoint52e_pre
669    
670    o fix bug in impldiff when Nr=1 or Nr=2.
671    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
672    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
673    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
674      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
675    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
676    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
677    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
678    
679    checkpoint52d_post
680    o re-tiled many expts to allow comparison in multi-processor mode
681      - updated output accordingly
682      - changed hs94.128x64x5 to use intial T from file rather than use the
683        random number generator
684    o add infrastructure in model routines for fizhi and gridalt packages
685    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
686    o changes to permit hi-res, cubed-sphere, configuration
687      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
688      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
689      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
690        of surface winds for the cube
691      (A verification experiment, based on global_ocean.cs32x15, but with
692       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
693       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
694       complete with example surface forcing files and matlab scripts to look
695       at the output and compare it with that of global_ocean.cs32x15.)
696    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
697       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
698       to conform to the common rule.
699    o check-in the first version of the coupler + interfaces for multi-components
700       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
701       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
702       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
703       - ocean and atmos. share the same horizontal grid (no interpolation).
704       - exchanges between component and coupler is done in forward_step
705    o new verification experiment, cpl_aim+ocn:
706       coupled ocean - AIM atmosphere on cs32 grid.
707    
708    checkpoint52d_pre
709    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
710    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
711    
712    checkpoint52c_post
713    o Fixing OPTIONS files for use of exf:
714      - ALLOW_ECCO not needed
715      - ECCO_CPPOPTIONS.h should not be included from
716        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
717        as has been the case in the past
718      - All cal/exf related options are currently set in
719        single header file. Should remain so until we
720        agree on a consistent new policy.
721    o Removed all CPP options for cal package.
722      cal has no more CPP options.
723    o modified STOREs in GAD_ADVECTION
724    o corrected key comp. for passkey
725    
726    checkpoint52b_post
727    o new version: "thsice" of thermodynamic sea-ice pkg:
728     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
729     - modify fluxes but do not change theta directly;
730     - light cleaning of bulk_force pkg (still needed with thsice).
731     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
732       + output_thsice.txt to test thsice & bulk_force pkgs.
733    o put back grid & coriolis monitor output.
734    checkpoint52b_pre
735    
736    o call "do_the_model_io" at the beginning (=> dump initial state)
737    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
738    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
739      (need info on NUMBER_OF_PTRACERS)
740    o missing PTRACERS headers in some routines
741    o default tamc.h in pkg/autodiff supposed to crash
742      to ensure proper customization
743    
744    checkpoint52a_post
745    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
746      - moved surfaceTendencyTice from pkg/seaice to main code
747      - subroutine FREEZE_SURFACE now limits only surface temperature
748        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
749        => new output.txt for global_ocean.cs32x15 & global_with_exf
750      - keep the old version of FREEZE for backward compatibility;
751        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
752      - corresponding modifs for TAF directives
753    o added surface flux output variables to TIMEAVE_STATVARS
754    o time-averaged output for pkg/ptracers
755    o fix problem with ECCO-related divided adjoint
756      snapshot file was missing some ad-variables,
757      but no warning issued by TAF
758    
759    checkpoint52a_pre
760    o some bug fixes for #undef REAL4_IS_SLOW
761    
762    checkpoint52 = ecco_c52_e35
763    o after testing adjoints of checkpoint51u_post
764    
765    checkpoint51u_post
766    o this is the post-merge tag of the ecco-branch
767      (needs another clean checkout and re-testing)
768    o various natl_box_adjoint configs and results
769      but no input fields
770    o obcs adjoint not yet merged!
771    o adding ECCO global 1x1 and 2x2 degree configs
772    o updated/extended some store directives for seaice
773    o pkg/ecco now containes ecco-specific part of cost function
774    o top level routines the_main_loop, forward_step
775      supersede those in model/src/
776      previous input data.cost now in data.ecco
777      (new namelist ecco_cost_nml)
778    o in ctrl/ cleaned some cross-dependencies and updated CPP options
779    
780    checkpoint51t_post
781    o this is the pre-merge tag of the ecco-branch
782    
783    checkpoint51s_post
784    o cleanup: removed various obsolete #define-s
785    o pkg/grdchk
786      - renamed 'ph-grd 3' to 'grad-res'
787      - merged from ecco-branch
788        (remaining bug fixes for obcs gradient checks)
789      - additional high-precision output for testreport
790        (grep for 'precision_grdchk_result')
791    
792    checkpoint51r_post
793    o cleaned up or removed CPP_OPTIONS.h files
794    o updated results for some of the tests to reflect the new
795      optfiles (-ieee: -O0 instead of -O3)
796    
797    checkpoint51q_post
798    o cd_code:
799      - moved cd_scheme.F -> cd_code_scheme.F
800      - separate read_checkpoint from cd_code_ini_vars.F
801      - separated cd_code part from write_checkpoint
802      - updated AD_SOURCE, generated .flow
803      - added CD_CODE_VARS.h to the_main_loop
804      - Moving cd_code specific store dir.s to pkg/cd_code
805    o ctrl package totally restructured
806      - pack/unpack now optional and decoupled from
807        xx_/adxx_ I/O
808      - ctrl_pack/unpack cleaned
809        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
810      - confined inclusion of AD_CONFIG.h to where necessary.
811    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
812    
813    checkpoint51p_post
814    o create initial cd_code package
815      - WARNING: the initialization of fields within packages
816        is broken because INI_FIELDS (where READ_CHECKPOINT is
817        called) is called *before* PACKAGES_INIT_VARIABLES.
818        This seems to be backwards since
819        1) its important to initially zero the entire field including
820           the "halo" region
821        2) zeroing needs to be done *before* reading pickup info
822           and the pickup call might or might not happen in any
823           particular run
824      - this needs an overhaul for R2
825    o cleanup verification/*/code/GMREDI_OPTIONS.h
826    o cleanup testreport
827    
828    checkpoint51o_post
829    o bringing AD-related verif's up to date with genmake2
830      - carbon/
831      - global_ocean.90x40x15/
832      - hs.94.1x64x5/
833      - (front_relax/ )
834    o (more) consistent directory structure for AD-related verif.'s
835    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
836    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
837    o bug fix in find_alpha.F for MDJWF:
838      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
839        change rho -> rho-rhoConst
840      - replace call find_rho to find_rhonum
841    o initialisation of rFlx extended to full array (required by TAF)
842      and shifted to thermodynamics
843    o removed PTRACERS.h in ptracers routine
844    o added surfacetendencyPtr to S/R parameter list pracers_forcing
845    o Correcting initialisations for fVerU, fVerV.
846    o helping TAF to recognize dependency on kUp for
847      fVerU, fVerV
848    o Replacing delZ by delR in pkg/ctrl/
849    checkpoint51o_pre
850    
851    o undid all of cp51 pending some cleanups and discussion
852    o added the [#include "AD_CONFIG.h"] statement to all files that need
853       it for adjoint/tl #defines
854     o re-worked the build logic in genmake2 to support AD_CONFIG.h
855     o removed tools/genmake since it no longer works
856    
857    checkpoint51n_post
858    o modifications to make FREEZE flux visible to pkg/kpp
859      - moved surfaceTendencyTice from pkg/seaice to main code
860      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
861      - subroutine FREEZE now limits only surface temperature
862        (this means new output.txt for global_ocean.90x40x15,
863         global_ocean.cs32x15, and global_with_exf)
864    o added surface flux output variables to TIMEAVE_STATVARS
865    
866    checkpoint51n_pre
867    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
868    o added [#include "AD_CONFIG.h"] to all files that use the following
869      defines:
870      - ALLOW_ADJOINT_RUN
871      - ALLOW_TANGENTLINEAR_RUN
872      - ALLOW_ECCO_OPTIMIZATION
873    
874    checkpoint51m_post
875    o incorporating changes to get TAMC/TAF working in genmake2
876      - added new TAMC/TAF targets to the Makefile
877      - various cleanups related to package handling
878      - these changes should have no impact on the forward model
879    
880    checkpoint51l_post
881    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
882     - faster algorithm for cal_addtime.F
883     - higher precision arithmetic, where needed
884     - pkg/exf *startdate variables changed from calendar date to
885       model integration time
886    
887    checkpoint51l_pre
888    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
889    o enable to apply restoring on S & T only in a latitude band.
890    o update output (external_forcing_surf modif. change truncation errors)
891       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
892    
893    checkpoint51k_post
894    o change default to: useNHMTerms=.FALSE.
895     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
896       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
897     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
898        exp1, ideal_2D_oce
899     - change data file of oceanic exp (leave the results unchanged for now)
900       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
901    o set gravitySign automatically according to the vertical coordinate used
902      (and change sign: back to "logical" value: +1 when R increases downward)
903    o added an include barrier to the default CPP_OPTIONS.h and
904      removed the #include "PACKAGES_CONFIG.h" from it
905    o fix a bug in mom_fluxform (from chk51j_post)
906    
907    checkpoint51j_post
908    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
909    o adjusted some flow directives (dynamics, thermodynamics)
910    o added cubed-sphere case to test cost function
911    o heckpoint_lev?_directives.h now include
912      pkg-specific directives, whenever those are enabled.
913    o Moving pkg-specific flow directives to corresponding pkg
914      Moving pkg-specific differentiation list to corresponding pkg
915      Moving pkg-specific checkpoint-lev storing to corresponding pkg
916      ---> conventions are
917           - pkg_ad.flow
918           - pkg_ad_diff.list
919           - pkg_ad_check_lev?_dir.h
920    
921    checkpoint51i_post
922    o merge of the branch-genmake2
923      - knowingly breaks the older genmake
924      - automatic generation of all ALLOW_${PKG_NAME} defines
925      - new testreport supersedes older testscript
926    o large number of package inclusion and header cleanups
927    checkpoint51i_pre
928    
929    o new output for adjoin of global ocean vector invariant
930    o fix for checkpoint of thermodynamic seaice and bulk_force
931    o Steph gchem various cleanups
932    
933    checkpoint 51h_pre
934    o fixed some single quotes
935    o modify gchem pkg to be more versatile
936    o modifications to clean up dic pkg
937    o add pkg/cfc
938    
939    checkpoint51g_post
940    o provide links for ARPACK and ADM*TLM
941    o start removing verification/vero/
942    o update AD-related stuff
943      (in particular some IF-statements in model/src/ routines)
944    o adding to verification/global_ocean.90x40x15/ adjoint of
945      vector invariant setup
946    
947    checkpoint51f_post
948    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
949    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
950      of tracer Green's fucntions for ocean inversion project.
951    
952    checkpoint51f_pre
953    o Added on-the-fly spatial interpolation capability
954        "USE_EXF_INTERPOLATION" to pkg/exf.
955      - This is a temporary Cartesian-grid hack until
956        the super-duper ESMF coupler becomes available.
957      - See verification/global_with_exf/README for usage example.
958      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
959        flags and modified pkg/seaice accordingly.
960    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
961        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
962        non-local transport term.
963    
964    checkpoint51e_post
965    o pkg/mom_vecinv:
966      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
967      - add time-ave diagnostic of vorticity advection.
968    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
969    o atmospheric geopotential: - include water vapor effect;
970                                - use p^kappa in p* scaling.
971    o land pkg: read initial state from files.
972    o AIM : add stratospheric drag in the upper level
973    
974    checkpoint51d_post
975    o change function ILNBLNK (=> last non-blank char.) to return zero
976      (instead of the string length) when the string. char is empty
977    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
978    o modif's to restore TAMC compatibility
979      - avoid "_d" constructs in PARAMETER declarations
980      - avoid interrupting lines by comment lines
981    o Use cluster local disks for purely local I/O
982      vs. globally visible disks needed for ctrl stuff
983      (merged from ecco-branch)
984      - new active_file_loc... and mdsio_..._loc routines
985      - affected packages: autodiff, ctrl, grdchk, mdsio
986    
987    checkpoint51c_post
988    o introducing integer flag debugLevel
989      - debLevZero: suppress all output
990      - debLevA: standard
991      - debLevB: equivalent to current debugMode=.TRUE.
992    o introducing pathname variable mdsioLocalDir for mdsio
993      that can be specified at runtime
994      (relevant for cluster I/O to local disk)
995    `
996    >>>checkpoint51b_post
997    adjoint of ptracers
998    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
999    o extended state in checkpoint_lev?, etc.
1000    o alternative ctrl/cost with tr1 or ptracer
1001    o new comlev1_bibj_ptracers
1002    o new ptracers.flow
1003    o made ptracers_forcing same as external_forcing_s
1004    o added verification for adjoint with ptracers
1005      - adm. grdchk fail so far
1006      - tlm. grdchk OK
1007      - checked tapelev/comlev recomputations: OK
1008    <<<checkpoint51b_pre
1009    
1010    checkpoint51a_post
1011    o added code for biogeochemistry package
1012      - new pkgs: dic, gchem
1013      - new subroutine in ptracers
1014    o modify code for biogeo packages
1015      - in model/src and pkg/ptracers
1016    
1017    checkpoint51
1018    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1019      - autodiff, ctrl, exf, grdchk, seaice
1020      kept separate packages
1021      - cost, ecco, obcs
1022    o updating verification/internal_wave, verification/lab_sea
1023      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1024    
1025    checkpoint50i_post
1026    o Preparing next differentiable checkpoint and sync
1027      of MAIN vs. ecco-branch
1028      - 1st step: this one is differentiable
1029      - 2nd step: next(! not this) checkpoint will have updated packages
1030                  from ecco-branch)
1031    
1032    checkpoint50h_post
1033    o new package "land": provide surface BC for AIM.
1034    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1035    o AIM: use true log-P extrapolation for near surface temp (= as in
1036        F.Molteni paper) ; update aim.5l_cs output.
1037    o New variable in PARM03 for more flexible pickups
1038    o somewhat cleaned package initialisation sequence for
1039      ctrl/ cost/ ecco/ in packages_... routines
1040    
1041    checkpoint50g_post
1042    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1043      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1044      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1045        made the default because of faster convergence than ADI
1046    
1047    checkpoint50f_post
1048    o exf totally restructured
1049      - replaced all exf_set_ routines by one generic exf_set_gen.F
1050        and made sure it's still differentiable
1051      - split exf_getffields.F into new exf_bulkformulae.F
1052      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1053      - updated adjoint/makefile and relevant verif. accordingly
1054    
1055    checkpoint50f_pre
1056     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1057          + change Evap over land. (update aim.5l_cs output)
1058     o added missing .cvsignores and made uniform across expts
1059     o changed configuration of tidal_basin_2d expt
1060     o added pkg/debug functions for tracing code in fatal crashes
1061     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1062     o new fn in pkg/monitor to stop model if solution grows too big
1063     o removed lots of single quotes from comments
1064    
1065    checkpoint50e_post
1066    o make KPP work with PTRACERS
1067     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1068       nearly a copy of kpp_transport_s
1069     - there is no analogue to SurfaceTendencyS, so I have to use
1070       gPtr(of the surface layer) instead
1071    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1072    checkpoint50e_pre
1073    
1074    checkpoint50d_post
1075    o change kpp output from multiple-record state files to single-record state
1076      files analogous to write_state.F
1077    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1078      analogous to the cg2d-related output.
1079    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1080      so that writing to internal file fn (with length 512) fails.
1081    checkpoint50d_pre
1082    
1083    checkpoint50c_post
1084    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1085    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1086    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1087    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1088    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1089    
1090    checkpoint50c_pre
1091    Merging from release1_p13:
1092    o bug fix for pkg/seaice dynamic solver
1093    o Added SEAICE_initialHEFF to pkg/seaice
1094    
1095    checkpoint50b_post
1096    o store u*,v* in gU,V instead of in guNm1,gvNm1
1097    o in order to put the momForcing out of the Adams-Bashforth:
1098      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1099      to timestep.F
1100    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1101    o re-generate output for highly sensitive test-exp:
1102       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1103    
1104    checkpoint50b_pre
1105    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1106    o corrected CPP option mismatch in exf_Bulk... functions for case
1107      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1108    
1109    checkpoint50a_post
1110    o Bug fix for merging between c50 and KPP.
1111      ikey was passed from thermodynamics to kpp_calc via
1112      common block rather than being recomputed in kpp_calc,
1113      in contradiction with new key itdkey.
1114      New key ikppkey created, and tamc.h headers updated.
1115    
1116    checkpoint50
1117    - 2nd step of merge with ecco-branch:
1118      merge changes in ecco-branch back into main trunk
1119    - bug fix in find_alpha
1120    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1121    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1122    - merged some sliced AD support routines
1123    
1124    checkpoint49
1125    merged from ecco-branch:
1126    o exf:
1127      - Enable initialisation of forcing fields to constant
1128        (runtime) values.
1129      - in exf_getffields.F
1130        Reduce i-/j-loop to interior domain, discarding overlaps.
1131        That also fixes wrong TAF-key computations for key_1, key_2
1132        with bulf formulae.
1133      - exf_init.F modify #ifdef for exf_init_evap
1134      - exf_getffieldrec.F, ctrl_getrec.F
1135        The following INT-usages are not safe:
1136          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1137          fldcount = int(fldsecs/fldperiod) + 1
1138        and were modified.
1139    o autodiff: checkpoint_lev...
1140      - updated storing for bulk formulae (some arrays were missing)
1141      - added state for seaice package
1142      - synchronized with main branch
1143    o DIVA:
1144      Modif.s in
1145      - the_main_loop.F
1146      - the_model_main.F
1147      and added cost_final_restore.F cost_final_store.F
1148      o With these changes, it is possible to fully separate
1149        the first forward run to compute the cost function (mdthe_main_loop)
1150        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1151        into separate model executions.
1152        This enables better tuning of DIVA to given queue sizes.
1153      o Loss of cost function value in consecutive DIVA runs is
1154        fixed by storing to 'costfinal' file.
1155      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1156        beginning/end of adjoint integration is accounted for.
1157      The current changes apply to TAF-1.4.26.
1158      TAF has one remaining bug, requiring one manual change
1159      (see MITgcm manual).
1160    o cal: synchronized between MAIN and ecco-branch
1161    
1162    checkpoint48i_post
1163    o Changes to restore differentiability of code w.r.t. previous tag
1164      (mostly adding new routines to make list and replacing
1165      pressure by totPhiHyd).
1166    o Updated and merged grdchk package
1167      - has both ADM and TLM checks
1168      - works for single- and multi-proc.
1169      - output cleaned
1170      - worked successfully for parallel DIVA
1171    o genmake:
1172      - Adding -platform=SP4
1173      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1174    o Modif. for DIVA:
1175      ctrl_unpack should not be called in intermediate DIVA interval.
1176      (similar thing would apply for active files such as
1177      tbar, sbar, psbar, which should not be reinitialised;
1178      only relevant for ecco-branch)
1179    
1180    checkpoint48h_post
1181    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1182    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1183    o Added SEAICE_initialHEFF to pkg/seaice
1184    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1185    
1186    checkpoint48g_post
1187    --- EOS:
1188    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1189      store total Potential in totPhyHyd for diagnostics & EOS.
1190    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1191    --- Pressure/geopotential gradient:
1192    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1193    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1194      ( changes results of global_ocean_pressure )
1195    o NLFS + z-coord.: add eta*Rho' contribution.
1196    o accurate phiHyd when using interface-W at the middle between 2 centers
1197     ( changes results of ideal_2D_oce )
1198    o includes r* 2nd term in potential gradient.
1199    
1200    checkpoint48f_post
1201    Merging from release1_p12:
1202    o Modifications for using pkg/exf with pkg/seaice
1203      - improved description of the various forcing configurations
1204      - added basic radiation bulk formulae to pkg/exf
1205      - units/sign fix for evap computation in exf_getffields.F
1206      - updated verification/global_with_exf/results/output.txt
1207    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1208      (SBO) core products, including oceanic mass, center-of-mass,
1209      angular, and bottom pressure (see pkg/sbo/README.sbo).
1210    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1211      to avoid negative values in shallow regions.
1212      - updated verification/natl_box/results/output.txt
1213      - updated verification/lab_sea/results/output.txt
1214    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1215    o Added useSingleCpuIO option (see PARAMS.h).
1216    o Updated useSingleCpuIO option in mdsio_writefield.F to
1217      work with multi-field files, e.g., for single-file pickup.
1218    o pkg/seaice:
1219      - bug fix in growth.F: QNET for no shortwave case
1220      - added HeffFile for specifying initial sea-ice thickness
1221      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1222    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1223      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1224    o pkg/seaice:
1225      - adjoint-friendly modifications
1226      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1227    
1228    checkpoint48e_post
1229    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1230    o dynamics: change definition of computational domain & adapt mom_fluxform
1231      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1232    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1233        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1234        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1235        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1236        inverted_barometer solid-body.cs-32x32x1
1237      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1238    
1239    checkpoint48d_post
1240    o in preparation for r*:
1241     a) use pre-computed gradient of hydrostatic potential:
1242        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1243     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1244        => affects results of glob_oce_pressure (different truncation error)  
1245      update output.txt of ideal_2D_oce & global_ocean_pressure
1246    
1247    checkpoint48d_pre
1248    o in preparation for r*:
1249      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1250      pass the 2 comp. of the grad. as arguments to momentum S/R.
1251      but for the moment, only used if it does not change the results.
1252    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1253    
1254    checkpoint48c_post
1255    Modifications in treatment of initial flux forcing controls
1256    to avoid extra storing of flux fields.
1257    
1258    checkpoint48c_pre
1259  o Added tidal_basin_2d experiment (currently 1D!)  o Added tidal_basin_2d experiment (currently 1D!)
1260  o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)  o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1261    

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