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revision 1.121 by heimbach, Tue Jan 21 19:44:45 2003 UTC revision 1.386 by heimbach, Wed Nov 17 04:18:45 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint56
7    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
8    o mnc: cleanup "full" files--fixes out-of-memory problem
9    o ECCO-GODAE
10      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
11      * fully merged and updated from SIO code
12        windstress sign change affects
13        - exf_inscal_[u/v]stress
14        - sign of xx_tau[u/v] adjustments
15        - signs in cost_scat
16      * ctrl_get_gen: avoid update of tau[u/v] for first few days
17      * natl_box_adjoint updated and compressed
18      * 2-level checkpoint switch added
19        (tested in EXP. 1 of natl_box_adjoint)
20      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
21    o SVD
22      * first complete, non-hacked version for SVD calculations
23      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
24        performed via direct access files admtlm_vector.it????
25        (via ctrl_[un]pack)
26      * optimcycle is used for ARPACK iteration counter
27        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
28      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
29        and add linear transforms where necessary
30      * controls are initial/final SST, SSS (can be extended; need to check
31        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
32    o mdsio: filename info to both stderr, stdout
33    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
34      from sign change
35    
36    checkpoint55j_post
37    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
38      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
39    o add consistent build directories and .cvsignore files to verification
40    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
41    o make all subroutines 30 or less characters in length for certain older
42      compilers to work (a thorough search only turns up two routines in
43      pkg/ptracers)
44    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
45      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
46    
47    checkpoint55i_post
48    o change arrays for total vertical diffusivity (2.D if explicit,
49      3.D if implicit) ; each ptracer uses its own background value.
50    o added mnc/NetCDF output capability to ocn_compon_interf
51      - added bits to verification/cpl_aim+ocn so that it can run on
52        ITRDA and other clusters without the mpirun "-wd" option
53    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
54      configuration
55    o give MNC the ability to create additional files rather than
56      exceeding a specified file size limit "MNC_MAX_FILESIZE"
57      - the default is just less than 2GB which is a practical limit
58        on many systems
59    o Compute the non-local term using either KPP vertical diffusivity (=default)
60       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
61    
62    checkpoint55h_post
63    o add verification test "vermix"
64    o remove all the *_ioinc flags and replace with the single global
65      outputTypesInclusive flag
66    o allow to set a vertical profile of vertical diffusivity for T & S
67    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
68    o useMNC moved from data.mnc to data.pkg
69    
70    checkpoint55g_post
71    o Renaming carbon AD experiments to comply with testreport conventions
72    o Updating adjoint of Held-Suarez hs94.1x64x5
73    o Fixing directives for non-ECCO forward_step, after ECCO directives
74      have been fixed to avoid recomp. of do_oceanic_phys
75      Works well for global_ocean.90x40x15,
76      but recomp. issue remains for carbon
77    o Updating adjoint output for natl_box_adjoint after
78      pkg/ecco has been modified (see taga c55d_post)
79    
80    checkpoint55f_post
81    o rename to timeave_init_fixed
82    
83    checkpoint55e_post
84    o some delicate re-shuffle of store directives to avoid one
85      extra call of do_oceanic_physics
86      affects ecco_the_main_loop.F, do_oceanic_physics.F
87      checkpoint_lev1_directives.h
88    o NB: this may break global_ocean adjoint temporarily,
89      but it is clear how to fix it. Will do later, need this now.
90    
91    checkpoint55d_post
92    o ECCO specific cost function terms (up-to-date with 1x1 runs)
93    o ecco_cost_weights is modified to 1x1 runs
94    o modifs to allow observations to be read in as
95      single file or yearly files
96    o enable to read exf forcing fields as either
97      single file or yearly files (flag useExfYearlyFields)
98    checkpoint55d_pre
99    
100    o switch between 2-level and 3-level checkpointing
101    o add ability of MNC to write local and "partial" (eg. 2D slices where
102      the full 3D field is never actually stored) arrays to NetCDF files
103      with the correct (that is, the complete multi-dimensional) set of
104      array indicies
105      - used in mom_vecinv() to write the diagFreq output
106      - tested (demonstrated) in verification/aim.5l_cs
107    o further mnc-ification
108      - add verification/lab_sea to the list with mnc setups
109      - fix undefined mnc v-names in cd_code
110      - add kpp to mnc output (both snapshot and timeave)
111    o non-hydrostatic code
112      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
113        in calc_gw.F
114      - defaults to viscAh
115      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
116        friction or Leith) in non-hydrostatic mode, as long as there is
117        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
118    o pkg/cost
119      extend simple cost functions to treat time mean quantities
120      (T,U,V) via cost_accumulate_state from cost_tile
121    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
122        be 2 times larger than the minimum size the advection scheme requires.
123        now get a perfect conservation of salt in advect_cs test-exp (updated)
124    o GGL90 (Gaspar's TKE mixed layer)
125      - add horizontal diffusion of TKE, requires exchanges in
126        do_fields_blocking_exchanges, horizontal diffusivity is zero by
127        default. In OPA there is no horizontal diffusion of TKE but the
128        mixing coefficients are computed from a horizontal average of TKE of
129        6 points or so. I think that diffusion has a little more physical
130        justification.
131      - clean up ggl90_calc in the hope of reducing memory usage (this hope
132        was in vain)
133      - mask tke-variable in ggl90_init
134    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
135    o fix biharmonic diffusion on CS-grid.
136    o more obcs stuff
137      - added obcs_external_fields_load as an alternative to the EXF-pkg option
138        for reading boundary values. This routine is called from
139        obcs_prescribe_read
140      - updated obcs_check
141      - changed sponge layer relaxation parameter units for days to seconds
142      - turned off sponge layer by default
143      - changed argument list of OBCS_CALC to myTime+deltaTclock
144      - fixed about 35 bugs in obcs_external_fields_load
145    
146    checkpoint55c_post
147    o obcs stuff
148      - new runtime flags useOBCSprescribe, useOBCSbalance
149      - re-arranged obcs_calc
150      - moved exf_getobcs to obcs_prescibe_read
151        obcs_prescibe_read is called after ORLANSKI stuff
152        and independent of it (executable can contain all).
153      - updated obcs_check
154      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
155        These may be necessary only if tangential velocities are
156        prescribed at OB, not sure, needs testing.
157    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
158      which simplifies the calls and passes the ifc check-bounds test
159    
160    checkpoint55b_post
161    o add a 2D scalar, Z location, exchange_2 routine.
162    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
163      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
164      affects advect_cs results (for the wrong reason): update output.txt
165    o use a more standard discretization for biharmonic viscosity ;
166     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
167      affects results of dome set-up: update output.txt
168    o fix gad_advection.F (CubedSphere part), back to version 1.23
169    o fix bug in mom_vi_del2uv.F (CubedSphere part).
170    
171    checkpoint55a_post
172    o merged code to
173      * prescribe/read time-dependent open boundaries
174        (works in conjunction with exf, cal)
175      * sponge layer code for open boundaries
176      * each boundary N/S/E/W now has its own CPP option
177        (healthy for the adjoint)
178    
179    checkpoint55
180    o up-to-date adjoint of previous breaks
181      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
182      - global_ocean_ebm: adjoint still needs fix (TLM ok)
183      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
184      - carbon: * remove tr1-related adjoint verification
185                * add ptracer as control variable
186    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
187      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
188    
189    checkpoint54f_post
190    o in verification/carbin/ remove experiment related to
191      ALLOW_PASSIVE_TRACER (array tr1 etc)
192      code_ad/ input_ad/ results_ad
193    
194    o add two new packages
195      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
196        + subject to optimization (memory)
197      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
198        + subject to reordering (many GOTOs in the original code)
199        + so far opps is called for every (i,j) point, and then operates in
200          the vertical; one may want to reorder the scheme in order operate in
201          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
202          fields)
203    o overhaul of IO so that we now have flags for MDSIO and/or MNC
204      - all verification tests compile and run with linux_ia32_g77
205      - defaults are compatible with current input files--nothing
206        should change if you were not previously using MNC
207      - MNC output has been added in numerous places (eg. timeave)
208        but there are still a few writes not yet do-able with MNC
209        (this is in progress)
210      - flags now allow for either/or/both use of MDSIO and MNC and
211        documentation will soon follow
212      - numerous small formatting cleanups for ProTeX
213    o add version info (via BUILD_INFO.h) to MNC and stdout
214    
215    checkpoint54e_post
216    o add two new packages
217      - pp81 (Packanowski and Philander, 1981), Richardson number and
218        stratification dependent mixing
219      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
220      - these scheme operate in a similar manner as KPP (without ghat, of
221        course), however there is only one diffusivity that is used for both
222        temperature and salinity (and passive tracers)ç
223    o add offline package
224    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
225      provided by Stephanie Dutkiewicz
226    o genmake2: add ability to search for C compilers and cleanup test output
227      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
228    
229    checkpoint54d_post
230    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
231    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
232      leading to additional shift by 5 days each year of integration
233       (i.e. leading to considerable offset over the years)
234    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
235    o start with no AB and no initial filtering (staggerTimeStep):
236      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
237    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
238      (external loading & cpl import/export stay in forward_step.F)
239    o update coupling interface to work with new staggerTimeStep
240    o change MDSIO ptracers_pickup.
241    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
242    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
243    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
244    
245    checkpoint54c_post
246    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
247      this affects (truncation error) output.txt of test-exp:
248       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
249    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
250    o change Qnet to always be the net heat flux, (+upward).
251      affects (truncation error) output of natl_box exp.: updated
252    o define the max number of passive tracers in PTRACERS_SIZE.h
253    o start to test mnc routinely in exp0
254    o add sea-ice loading (sIceLoad) as a new forcing field.
255    
256    checkpoint54b_post
257    o add testreport "-j JOBS" option for parallel builds (tested and pretty
258       impressive on Altix and Opteron systems)
259    o diagnostics can now write NetCDF files through the mnc package
260    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
261    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
262    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
263      affects (truncation error) output of lab_sea & natl_box exp.: updated
264    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
265    
266    checkpoint54a_post
267    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
268    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
269    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
270    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
271      + internal_wave (shift in writing cg2d_ini_res)
272    checkpoint54a_pre
273    
274    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
275      - modified verification/lab_sea and natl_box_adjoint accordingly
276    
277    checkpoint54
278    checkpoint53g_post
279    o prepare splitting of thermodynamics: store convect.counter in common block
280    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
281      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
282    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
283    o new parameter "nShapS": allow to treat differently S from T (nShapT)
284    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
285    o restore adjointability
286    
287    checkpoint53f_post
288    o modifications that affect AIM experiment results (update output.txt):
289      - no advection of S at top interface Nr (pkg/generic_advdiff)
290      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
291    o AIM pkg:
292      - include stability function into surf.Flux derivative relative to Tsurf
293      - calculate clear-sky radiation & surface temp. change (for diagnostics)
294    
295    checkpoint53e_post
296    o merged cylindrical coord configuration
297    o added rotating_tank experiment
298    checkpoint53e_pre
299    
300    checkpoint53d_post
301    o faulks upgraded: re-generate output.txt that have changed:
302       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
303    o Added Bryan and Lewis, 1979, vertical diffusivity profile
304    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
305    o added Sadourny discretization of Coriolis
306      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
307      - re-enabled use of omega3 (useAbsVorticity)
308    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
309      vector-invariant equations
310      - note: does *NOT* yet use same variable visc. for no-slip BC's.
311    o recoded the lateral boundary conditions for non-hydrostatic w, this time
312      hopefully without new bugs
313      - still to do: biharmonic friction for non-hydrostatic w
314    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
315    o regenerated output for global_ocean_ebm (using -ieee)
316    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
317      of mom_common/
318      - simple re-arrangement of instructions within computing loop
319    checkpoint53d_pre
320    
321    checkpoint53c_post
322    o new version of coupler for AIM+thSIce and Ocean models
323     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
324     - land: change Evaporation of snow
325     - aim with thSIce: fix bug in snow-precip.
326    o changes to calc_gw.F
327     - bug fix for w^2 term near the bottom boundary
328     - (hopefully) improve the lateral slip boundary condtions for use with
329        partial/looped cells
330      - because the bug fix changes two verification experiments anyway (exp5
331        and plume on slope), change the lateral boundary condition from half slip
332        to the value of no_slip_sides
333    o ebm package wasnt quite up to the parallel task. Fixed that.
334    o Adjoint of EBM package + verification
335      * TLM OK
336      * ADM not sufficient accuracy yet (needs further testing)
337    
338    checkpoint53b_post
339    o Commiting new energy balance model to repository
340      * package is pkg/ebm
341      * verif. is verification/global_ocean_ebm
342      * references are in ebm_driver.F
343    C      * X. Wang, P. Stone and J. Marotzke, 1999:
344    C        Global thermohaline circulation. Part I:
345    C        Sensitivity to atmospheric moisture transport.
346    C        J. Climate 12(1), 71-82
347    C      * X. Wang, P. Stone and J. Marotzke, 1999:
348    C        Global thermohaline circulation. Part II:
349    C        Sensitivity with interactive transport.
350    C        J. Climate 12(1), 83-91
351    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
352    C        Destabilization of the thermohaline circulation
353    C        by atmospheric eddy transports.
354    C        J. Climate 7(12), 1870-1882
355    o Will need long integration testing.
356    checkpoint53b_pre
357    
358    o created pkg/mom_common in preparation for variable viscosity code
359    o renamed and split ini_mnc_io
360    o pkg/land: only liquid water can diffuse or run-off
361    o AIM using land: soil wetness availability account for snow
362    o added printMapIncludesZeros to EEPARMS namelist
363    
364    checkpoint53a_post
365    o restore TAMC compatiility for exf_constants.h
366      (no usage of _d in .h)
367    o Additional storing in KPP in an attempt to fix
368      TAMC problem with adjoint of KPP code.
369      (no success...)
370      Identical code works fine with TAF.
371    o Fixed verification/natl_box_adjoint experiments.
372      Initial conditions for Experiments 4 and 5 are now
373      set to "SEAICE_initialHEFF=0", which is more reasonable,
374      and hence gives results closer to that of Experiment 2.
375      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
376    
377    checkpoint53
378    o stable checkpoint with up to date adjoint
379      TLM tests only run for 1st grdchk at the moment. Its unclear if
380      this is a code problem or a problem with resetting code for g_
381      variables that is being autogenerated wrong.
382      Otherwise:
383       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
384       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
385         are both still in chaos following their security messes.
386    
387    checkpoint52n_post
388    o various build (mostly genmake2) changes including:
389      - ability to build/run more easily within Cygwin and MacOS X
390      - more complicated Makefiles with a stronger dependence on Gnu Make
391    o pkg/seaice modifications
392      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
393        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
394        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
395      - changed proxy for geostrophic velocity and updated
396        verification/lab_sea/results/* accordingly
397      - removed ADI dynamic solver from pkg/seaice
398      - replaced all occurrences of 1/CSTICE or 1/CSUICE
399        they caused a segmentation fault under certain circumstances
400      - removed unused field WATR
401    o bug fix in exf-package:
402      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
403         now reflect that.
404    o small fixes in the cal-package:
405      - set reference date to first of January for the 'model'-calendar
406      - failing of cal_CheckDate in cal_FullDate now actually results in a
407        warning
408    o small modifications in exf-package to increase flexibility:
409      - change climtempfreeze from a constant to a runtime parameter that
410        is specified in data.exf_clim (default = -1.9)
411      - introduce runtime parameter windstressmax (default = 2.0) that is
412        specified in data.exf
413    o fix in pkg/thsice:
414      - update Evap (Tsf changes) to be consistent with Latent heat flux
415      - maintain snow precipitation unchanged (even if Tsf >=0).
416     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
417    
418    checkpoint52m_post
419    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
420      this does not change any of the results, because myIter=0 in swfrac always
421      lead to jwtype=2 (the default anyway), but the call makes little sense
422      as a default
423    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
424    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
425      atmospheric model (AIM) to use it ; add a "slab ocean" component.
426    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
427    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
428    o extending useSingleCpuIO option to work with new exch2 I/O format
429      - old-style, missing-tile I/O is still accessible by defining CPP
430        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
431    o monitor package can write to NetCDF files and/or STDOUT
432    o fix re-definition bug in MNC_GRID_INIT_ALL()
433    o doc/api_reference added
434      - a framework for building an API Reference Manual using all
435        the "protex" comments embedded in the code
436      - see pkg/generic_advdiff, pkg/mnc for examples
437    o MNC:
438      - make myThid the last argument for all subroutines
439      - new default for the grid files: NO halos
440      - add useMNC and other run-time flags
441      - separate per-file-group handling of the unlimited dimension
442      - early initialization of MNC w/ flags read at the eeboot stage
443        and lookup tables set in initialize_fixed
444      - write all MNC output to a freshly-created directory
445    o thermodynamics sea-ice (thsice) is now tested with testreport.
446    o test exp. advect_cs: use the standard cs32 grid ; update output.
447    o Added functionality to grdchk:
448      pick global i,j,k position (or nearest wet) where to perform check.
449    
450    checkpoint52l_post
451    o new land formulation:
452      a) use ground enthalpy as prognostic variable to ensure exact
453         energy conservation.
454      b) account for water temperature and for latent heat of freezing
455         in all processes (rain, run-off, ground storage)
456      c) compute surface and ground temperature implicitly.
457    o aim_v23 modification for new land model:
458      a) Treat separately land / ocean / sea-ice surface fluxes
459         to allow implicit computation of land & sea-ice surface temp.
460      b) add snow precipitation.
461    checkpoint52l_pre
462    
463    o fix problem (when 1 tile is empty) in min/max monitor.
464    o fix bug in timeAve (u,vZetatave in common block)
465    o no restoring terms under ice for pkg/seaice
466    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
467    o bug fix for pkg/seaice pickups
468    o change MNC call locations and add coordinate attributes
469    o mask vorticity at the corner ; affects global_ocean.cs output
470    o fix ini_curvilinear_grid ; test CS experiments with mpi
471    o aim.5l_cs: modify sea-ice fraction input file ; update output
472    o exf: Adding simple range check routine for exf fields after read
473    
474    checkpoint52k_post
475    o removed top-level directory "diags"
476      - we migrated these functions to pkg/timeave a long time ago
477    o fixed bug introduced in pkg/monitor
478    o accuracy ctrlprec = 32 insuffient for gradient checks using
479      averaged fields (I/O via cost_averages)
480      -> use ctrl.h in active_file*.F to control I/O precision.
481    o paramter list of CALL ADTHE_MAIN_LOOP
482    o added initial do_the_model_io to ecco
483    o set all ...Freq to zero after cost_final
484      taveFreq, dumpFreq, pChkptFreq
485    o MAIN and ECCO differentiability restored
486    
487    checkpoint52j_post
488    o fix nchklev in tamc.h for global_ocean...
489    o Bringing flow and store directives up-to-date
490    o Really weird thing!
491      call do_the_model_io from the_main_loop with parameters
492      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
493      TAF places a faulty re-call of initialise_varia
494      after cost_final call which should not be there!
495    checkpoint52j_pre
496    
497    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
498      error messages
499    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
500    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
501      debug output
502    o modfied mdsio_writefield.F to handle non-global files under exch2
503    o update AIM Cubed-Sphere exp (aim.5l_cs):
504      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
505    o update AIM Equatorial Channel exp:
506      use standard aim_v23 pkg and change the SST fields to be more realistic.
507    o globalFile now works with exch2
508    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
509      mon_vort3.F to make exch2 friendly with >1 tile per cube face
510    o limit timeave output for hi-res integrations
511    
512    checkpoint52i_post
513    o removed CPP_EEOPTIONS.h from verification/*/code
514    o updated the tiling for global_ocean_pressure
515    checkpoint52i_pre
516    
517    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
518      the old pkg/aim).
519    
520    checkpoint52h_pre
521    o shortened offending lines in exch2_send_rx?.template
522    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
523    o genmake2: add build & execute test for NetCDF code
524    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
525      old grid files, moved CPP_EEMACROS.h to pkg/exch2
526    o added useSingleCPUIO flag to monitor.F and mon_out.F
527    o added temporary hack for sea-ice dynamics on the cube:
528      metric terms are ignored and it is assumed that
529      there is no sea-ice on cube faces 1, 2, 4, and 5.
530    
531    checkpoint52f_post
532    o added exch2 cube routines to pkg/exch2
533    o modified hs94.cs-32x32x5 to use it
534    o added new grid files to hs94.cs-32x32x5
535    checkpoint52f_pre
536    
537    checkpoint52e_post
538    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
539      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
540    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
541      to work with implicit vertical advection and AB ;
542    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
543    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
544     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
545    checkpoint52e_pre
546    
547    o fix bug in impldiff when Nr=1 or Nr=2.
548    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
549    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
550    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
551      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
552    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
553    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
554    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
555    
556    checkpoint52d_post
557    o re-tiled many expts to allow comparison in multi-processor mode
558      - updated output accordingly
559      - changed hs94.128x64x5 to use intial T from file rather than use the
560        random number generator
561    o add infrastructure in model routines for fizhi and gridalt packages
562    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
563    o changes to permit hi-res, cubed-sphere, configuration
564      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
565      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
566      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
567        of surface winds for the cube
568      (A verification experiment, based on global_ocean.cs32x15, but with
569       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
570       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
571       complete with example surface forcing files and matlab scripts to look
572       at the output and compare it with that of global_ocean.cs32x15.)
573    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
574       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
575       to conform to the common rule.
576    o check-in the first version of the coupler + interfaces for multi-components
577       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
578       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
579       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
580       - ocean and atmos. share the same horizontal grid (no interpolation).
581       - exchanges between component and coupler is done in forward_step
582    o new verification experiment, cpl_aim+ocn:
583       coupled ocean - AIM atmosphere on cs32 grid.
584    
585    checkpoint52d_pre
586    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
587    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
588    
589    checkpoint52c_post
590    o Fixing OPTIONS files for use of exf:
591      - ALLOW_ECCO not needed
592      - ECCO_CPPOPTIONS.h should not be included from
593        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
594        as has been the case in the past
595      - All cal/exf related options are currently set in
596        single header file. Should remain so until we
597        agree on a consistent new policy.
598    o Removed all CPP options for cal package.
599      cal has no more CPP options.
600    o modified STOREs in GAD_ADVECTION
601    o corrected key comp. for passkey
602    
603    checkpoint52b_post
604    o new version: "thsice" of thermodynamic sea-ice pkg:
605     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
606     - modify fluxes but do not change theta directly;
607     - light cleaning of bulk_force pkg (still needed with thsice).
608     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
609       + output_thsice.txt to test thsice & bulk_force pkgs.
610    o put back grid & coriolis monitor output.
611    checkpoint52b_pre
612    
613    o call "do_the_model_io" at the beginning (=> dump initial state)
614    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
615    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
616      (need info on NUMBER_OF_PTRACERS)
617    o missing PTRACERS headers in some routines
618    o default tamc.h in pkg/autodiff supposed to crash
619      to ensure proper customization
620    
621    checkpoint52a_post
622    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
623      - moved surfaceTendencyTice from pkg/seaice to main code
624      - subroutine FREEZE_SURFACE now limits only surface temperature
625        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
626        => new output.txt for global_ocean.cs32x15 & global_with_exf
627      - keep the old version of FREEZE for backward compatibility;
628        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
629      - corresponding modifs for TAF directives
630    o added surface flux output variables to TIMEAVE_STATVARS
631    o time-averaged output for pkg/ptracers
632    o fix problem with ECCO-related divided adjoint
633      snapshot file was missing some ad-variables,
634      but no warning issued by TAF
635    
636    checkpoint52a_pre
637    o some bug fixes for #undef REAL4_IS_SLOW
638    
639    checkpoint52 = ecco_c52_e35
640    o after testing adjoints of checkpoint51u_post
641    
642    checkpoint51u_post
643    o this is the post-merge tag of the ecco-branch
644      (needs another clean checkout and re-testing)
645    o various natl_box_adjoint configs and results
646      but no input fields
647    o obcs adjoint not yet merged!
648    o adding ECCO global 1x1 and 2x2 degree configs
649    o updated/extended some store directives for seaice
650    o pkg/ecco now containes ecco-specific part of cost function
651    o top level routines the_main_loop, forward_step
652      supersede those in model/src/
653      previous input data.cost now in data.ecco
654      (new namelist ecco_cost_nml)
655    o in ctrl/ cleaned some cross-dependencies and updated CPP options
656    
657    checkpoint51t_post
658    o this is the pre-merge tag of the ecco-branch
659    
660    checkpoint51s_post
661    o cleanup: removed various obsolete #define-s
662    o pkg/grdchk
663      - renamed 'ph-grd 3' to 'grad-res'
664      - merged from ecco-branch
665        (remaining bug fixes for obcs gradient checks)
666      - additional high-precision output for testreport
667        (grep for 'precision_grdchk_result')
668    
669    checkpoint51r_post
670    o cleaned up or removed CPP_OPTIONS.h files
671    o updated results for some of the tests to reflect the new
672      optfiles (-ieee: -O0 instead of -O3)
673    
674    checkpoint51q_post
675    o cd_code:
676      - moved cd_scheme.F -> cd_code_scheme.F
677      - separate read_checkpoint from cd_code_ini_vars.F
678      - separated cd_code part from write_checkpoint
679      - updated AD_SOURCE, generated .flow
680      - added CD_CODE_VARS.h to the_main_loop
681      - Moving cd_code specific store dir.s to pkg/cd_code
682    o ctrl package totally restructured
683      - pack/unpack now optional and decoupled from
684        xx_/adxx_ I/O
685      - ctrl_pack/unpack cleaned
686        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
687      - confined inclusion of AD_CONFIG.h to where necessary.
688    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
689    
690    checkpoint51p_post
691    o create initial cd_code package
692      - WARNING: the initialization of fields within packages
693        is broken because INI_FIELDS (where READ_CHECKPOINT is
694        called) is called *before* PACKAGES_INIT_VARIABLES.
695        This seems to be backwards since
696        1) its important to initially zero the entire field including
697           the "halo" region
698        2) zeroing needs to be done *before* reading pickup info
699           and the pickup call might or might not happen in any
700           particular run
701      - this needs an overhaul for R2
702    o cleanup verification/*/code/GMREDI_OPTIONS.h
703    o cleanup testreport
704    
705    checkpoint51o_post
706    o bringing AD-related verif's up to date with genmake2
707      - carbon/
708      - global_ocean.90x40x15/
709      - hs.94.1x64x5/
710      - (front_relax/ )
711    o (more) consistent directory structure for AD-related verif.'s
712    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
713    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
714    o bug fix in find_alpha.F for MDJWF:
715      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
716        change rho -> rho-rhoConst
717      - replace call find_rho to find_rhonum
718    o initialisation of rFlx extended to full array (required by TAF)
719      and shifted to thermodynamics
720    o removed PTRACERS.h in ptracers routine
721    o added surfacetendencyPtr to S/R parameter list pracers_forcing
722    o Correcting initialisations for fVerU, fVerV.
723    o helping TAF to recognize dependency on kUp for
724      fVerU, fVerV
725    o Replacing delZ by delR in pkg/ctrl/
726    checkpoint51o_pre
727    
728    o undid all of cp51 pending some cleanups and discussion
729    o added the [#include "AD_CONFIG.h"] statement to all files that need
730       it for adjoint/tl #defines
731     o re-worked the build logic in genmake2 to support AD_CONFIG.h
732     o removed tools/genmake since it no longer works
733    
734    checkpoint51n_post
735    o modifications to make FREEZE flux visible to pkg/kpp
736      - moved surfaceTendencyTice from pkg/seaice to main code
737      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
738      - subroutine FREEZE now limits only surface temperature
739        (this means new output.txt for global_ocean.90x40x15,
740         global_ocean.cs32x15, and global_with_exf)
741    o added surface flux output variables to TIMEAVE_STATVARS
742    
743    checkpoint51n_pre
744    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
745    o added [#include "AD_CONFIG.h"] to all files that use the following
746      defines:
747      - ALLOW_ADJOINT_RUN
748      - ALLOW_TANGENTLINEAR_RUN
749      - ALLOW_ECCO_OPTIMIZATION
750    
751    checkpoint51m_post
752    o incorporating changes to get TAMC/TAF working in genmake2
753      - added new TAMC/TAF targets to the Makefile
754      - various cleanups related to package handling
755      - these changes should have no impact on the forward model
756    
757    checkpoint51l_post
758    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
759     - faster algorithm for cal_addtime.F
760     - higher precision arithmetic, where needed
761     - pkg/exf *startdate variables changed from calendar date to
762       model integration time
763    
764    checkpoint51l_pre
765    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
766    o enable to apply restoring on S & T only in a latitude band.
767    o update output (external_forcing_surf modif. change truncation errors)
768       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
769    
770    checkpoint51k_post
771    o change default to: useNHMTerms=.FALSE.
772     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
773       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
774     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
775        exp1, ideal_2D_oce
776     - change data file of oceanic exp (leave the results unchanged for now)
777       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
778    o set gravitySign automatically according to the vertical coordinate used
779      (and change sign: back to "logical" value: +1 when R increases downward)
780    o added an include barrier to the default CPP_OPTIONS.h and
781      removed the #include "PACKAGES_CONFIG.h" from it
782    o fix a bug in mom_fluxform (from chk51j_post)
783    
784    checkpoint51j_post
785    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
786    o adjusted some flow directives (dynamics, thermodynamics)
787    o added cubed-sphere case to test cost function
788    o heckpoint_lev?_directives.h now include
789      pkg-specific directives, whenever those are enabled.
790    o Moving pkg-specific flow directives to corresponding pkg
791      Moving pkg-specific differentiation list to corresponding pkg
792      Moving pkg-specific checkpoint-lev storing to corresponding pkg
793      ---> conventions are
794           - pkg_ad.flow
795           - pkg_ad_diff.list
796           - pkg_ad_check_lev?_dir.h
797    
798    checkpoint51i_post
799    o merge of the branch-genmake2
800      - knowingly breaks the older genmake
801      - automatic generation of all ALLOW_${PKG_NAME} defines
802      - new testreport supersedes older testscript
803    o large number of package inclusion and header cleanups
804    checkpoint51i_pre
805    
806    o new output for adjoin of global ocean vector invariant
807    o fix for checkpoint of thermodynamic seaice and bulk_force
808    o Steph gchem various cleanups
809    
810    checkpoint 51h_pre
811    o fixed some single quotes
812    o modify gchem pkg to be more versatile
813    o modifications to clean up dic pkg
814    o add pkg/cfc
815    
816    checkpoint51g_post
817    o provide links for ARPACK and ADM*TLM
818    o start removing verification/vero/
819    o update AD-related stuff
820      (in particular some IF-statements in model/src/ routines)
821    o adding to verification/global_ocean.90x40x15/ adjoint of
822      vector invariant setup
823    
824    checkpoint51f_post
825    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
826    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
827      of tracer Green's fucntions for ocean inversion project.
828    
829    checkpoint51f_pre
830    o Added on-the-fly spatial interpolation capability
831        "USE_EXF_INTERPOLATION" to pkg/exf.
832      - This is a temporary Cartesian-grid hack until
833        the super-duper ESMF coupler becomes available.
834      - See verification/global_with_exf/README for usage example.
835      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
836        flags and modified pkg/seaice accordingly.
837    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
838        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
839        non-local transport term.
840    
841    checkpoint51e_post
842    o pkg/mom_vecinv:
843      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
844      - add time-ave diagnostic of vorticity advection.
845    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
846    o atmospheric geopotential: - include water vapor effect;
847                                - use p^kappa in p* scaling.
848    o land pkg: read initial state from files.
849    o AIM : add stratospheric drag in the upper level
850    
851    checkpoint51d_post
852    o change function ILNBLNK (=> last non-blank char.) to return zero
853      (instead of the string length) when the string. char is empty
854    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
855    o modif's to restore TAMC compatibility
856      - avoid "_d" constructs in PARAMETER declarations
857      - avoid interrupting lines by comment lines
858    o Use cluster local disks for purely local I/O
859      vs. globally visible disks needed for ctrl stuff
860      (merged from ecco-branch)
861      - new active_file_loc... and mdsio_..._loc routines
862      - affected packages: autodiff, ctrl, grdchk, mdsio
863    
864    checkpoint51c_post
865    o introducing integer flag debugLevel
866      - debLevZero: suppress all output
867      - debLevA: standard
868      - debLevB: equivalent to current debugMode=.TRUE.
869    o introducing pathname variable mdsioLocalDir for mdsio
870      that can be specified at runtime
871      (relevant for cluster I/O to local disk)
872    `
873    >>>checkpoint51b_post
874    adjoint of ptracers
875    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
876    o extended state in checkpoint_lev?, etc.
877    o alternative ctrl/cost with tr1 or ptracer
878    o new comlev1_bibj_ptracers
879    o new ptracers.flow
880    o made ptracers_forcing same as external_forcing_s
881    o added verification for adjoint with ptracers
882      - adm. grdchk fail so far
883      - tlm. grdchk OK
884      - checked tapelev/comlev recomputations: OK
885    <<<checkpoint51b_pre
886    
887    checkpoint51a_post
888    o added code for biogeochemistry package
889      - new pkgs: dic, gchem
890      - new subroutine in ptracers
891    o modify code for biogeo packages
892      - in model/src and pkg/ptracers
893    
894    checkpoint51
895    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
896      - autodiff, ctrl, exf, grdchk, seaice
897      kept separate packages
898      - cost, ecco, obcs
899    o updating verification/internal_wave, verification/lab_sea
900      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
901    
902    checkpoint50i_post
903    o Preparing next differentiable checkpoint and sync
904      of MAIN vs. ecco-branch
905      - 1st step: this one is differentiable
906      - 2nd step: next(! not this) checkpoint will have updated packages
907                  from ecco-branch)
908    
909    checkpoint50h_post
910    o new package "land": provide surface BC for AIM.
911    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
912    o AIM: use true log-P extrapolation for near surface temp (= as in
913        F.Molteni paper) ; update aim.5l_cs output.
914    o New variable in PARM03 for more flexible pickups
915    o somewhat cleaned package initialisation sequence for
916      ctrl/ cost/ ecco/ in packages_... routines
917    
918    checkpoint50g_post
919    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
920      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
921      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
922        made the default because of faster convergence than ADI
923    
924    checkpoint50f_post
925    o exf totally restructured
926      - replaced all exf_set_ routines by one generic exf_set_gen.F
927        and made sure it's still differentiable
928      - split exf_getffields.F into new exf_bulkformulae.F
929      - exf_inscal_/exf_outscal_ suffixes consistent with field names
930      - updated adjoint/makefile and relevant verif. accordingly
931    
932    checkpoint50f_pre
933     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
934          + change Evap over land. (update aim.5l_cs output)
935     o added missing .cvsignores and made uniform across expts
936     o changed configuration of tidal_basin_2d expt
937     o added pkg/debug functions for tracing code in fatal crashes
938     o tidied pkg/monitor to use MONITOR_OPTIONS.h
939     o new fn in pkg/monitor to stop model if solution grows too big
940     o removed lots of single quotes from comments
941    
942    checkpoint50e_post
943    o make KPP work with PTRACERS
944     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
945       nearly a copy of kpp_transport_s
946     - there is no analogue to SurfaceTendencyS, so I have to use
947       gPtr(of the surface layer) instead
948    o add a new platform SunFire+mpi (SunFire 15000) to genmake
949    checkpoint50e_pre
950    
951    checkpoint50d_post
952    o change kpp output from multiple-record state files to single-record state
953      files analogous to write_state.F
954    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
955      analogous to the cg2d-related output.
956    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
957      so that writing to internal file fn (with length 512) fails.
958    checkpoint50d_pre
959    
960    checkpoint50c_post
961    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
962    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
963    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
964    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
965    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
966    
967    checkpoint50c_pre
968    Merging from release1_p13:
969    o bug fix for pkg/seaice dynamic solver
970    o Added SEAICE_initialHEFF to pkg/seaice
971    
972    checkpoint50b_post
973    o store u*,v* in gU,V instead of in guNm1,gvNm1
974    o in order to put the momForcing out of the Adams-Bashforth:
975      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
976      to timestep.F
977    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
978    o re-generate output for highly sensitive test-exp:
979       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
980    
981    checkpoint50b_pre
982    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
983    o corrected CPP option mismatch in exf_Bulk... functions for case
984      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
985    
986    checkpoint50a_post
987    o Bug fix for merging between c50 and KPP.
988      ikey was passed from thermodynamics to kpp_calc via
989      common block rather than being recomputed in kpp_calc,
990      in contradiction with new key itdkey.
991      New key ikppkey created, and tamc.h headers updated.
992    
993    checkpoint50
994    - 2nd step of merge with ecco-branch:
995      merge changes in ecco-branch back into main trunk
996    - bug fix in find_alpha
997    - more storing in gmredi_calc_tensor.F, kpp_routines.F
998    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
999    - merged some sliced AD support routines
1000    
1001    checkpoint49
1002    merged from ecco-branch:
1003    o exf:
1004      - Enable initialisation of forcing fields to constant
1005        (runtime) values.
1006      - in exf_getffields.F
1007        Reduce i-/j-loop to interior domain, discarding overlaps.
1008        That also fixes wrong TAF-key computations for key_1, key_2
1009        with bulf formulae.
1010      - exf_init.F modify #ifdef for exf_init_evap
1011      - exf_getffieldrec.F, ctrl_getrec.F
1012        The following INT-usages are not safe:
1013          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1014          fldcount = int(fldsecs/fldperiod) + 1
1015        and were modified.
1016    o autodiff: checkpoint_lev...
1017      - updated storing for bulk formulae (some arrays were missing)
1018      - added state for seaice package
1019      - synchronized with main branch
1020    o DIVA:
1021      Modif.s in
1022      - the_main_loop.F
1023      - the_model_main.F
1024      and added cost_final_restore.F cost_final_store.F
1025      o With these changes, it is possible to fully separate
1026        the first forward run to compute the cost function (mdthe_main_loop)
1027        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1028        into separate model executions.
1029        This enables better tuning of DIVA to given queue sizes.
1030      o Loss of cost function value in consecutive DIVA runs is
1031        fixed by storing to 'costfinal' file.
1032      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1033        beginning/end of adjoint integration is accounted for.
1034      The current changes apply to TAF-1.4.26.
1035      TAF has one remaining bug, requiring one manual change
1036      (see MITgcm manual).
1037    o cal: synchronized between MAIN and ecco-branch
1038    
1039    checkpoint48i_post
1040    o Changes to restore differentiability of code w.r.t. previous tag
1041      (mostly adding new routines to make list and replacing
1042      pressure by totPhiHyd).
1043    o Updated and merged grdchk package
1044      - has both ADM and TLM checks
1045      - works for single- and multi-proc.
1046      - output cleaned
1047      - worked successfully for parallel DIVA
1048    o genmake:
1049      - Adding -platform=SP4
1050      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1051    o Modif. for DIVA:
1052      ctrl_unpack should not be called in intermediate DIVA interval.
1053      (similar thing would apply for active files such as
1054      tbar, sbar, psbar, which should not be reinitialised;
1055      only relevant for ecco-branch)
1056    
1057    checkpoint48h_post
1058    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1059    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1060    o Added SEAICE_initialHEFF to pkg/seaice
1061    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1062    
1063    checkpoint48g_post
1064    --- EOS:
1065    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1066      store total Potential in totPhyHyd for diagnostics & EOS.
1067    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1068    --- Pressure/geopotential gradient:
1069    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1070    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1071      ( changes results of global_ocean_pressure )
1072    o NLFS + z-coord.: add eta*Rho' contribution.
1073    o accurate phiHyd when using interface-W at the middle between 2 centers
1074     ( changes results of ideal_2D_oce )
1075    o includes r* 2nd term in potential gradient.
1076    
1077    checkpoint48f_post
1078    Merging from release1_p12:
1079    o Modifications for using pkg/exf with pkg/seaice
1080      - improved description of the various forcing configurations
1081      - added basic radiation bulk formulae to pkg/exf
1082      - units/sign fix for evap computation in exf_getffields.F
1083      - updated verification/global_with_exf/results/output.txt
1084    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1085      (SBO) core products, including oceanic mass, center-of-mass,
1086      angular, and bottom pressure (see pkg/sbo/README.sbo).
1087    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1088      to avoid negative values in shallow regions.
1089      - updated verification/natl_box/results/output.txt
1090      - updated verification/lab_sea/results/output.txt
1091    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1092    o Added useSingleCpuIO option (see PARAMS.h).
1093    o Updated useSingleCpuIO option in mdsio_writefield.F to
1094      work with multi-field files, e.g., for single-file pickup.
1095    o pkg/seaice:
1096      - bug fix in growth.F: QNET for no shortwave case
1097      - added HeffFile for specifying initial sea-ice thickness
1098      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1099    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1100      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1101    o pkg/seaice:
1102      - adjoint-friendly modifications
1103      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1104    
1105    checkpoint48e_post
1106    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1107    o dynamics: change definition of computational domain & adapt mom_fluxform
1108      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1109    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1110        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1111        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1112        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1113        inverted_barometer solid-body.cs-32x32x1
1114      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1115    
1116    checkpoint48d_post
1117    o in preparation for r*:
1118     a) use pre-computed gradient of hydrostatic potential:
1119        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1120     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1121        => affects results of glob_oce_pressure (different truncation error)  
1122      update output.txt of ideal_2D_oce & global_ocean_pressure
1123    
1124    checkpoint48d_pre
1125    o in preparation for r*:
1126      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1127      pass the 2 comp. of the grad. as arguments to momentum S/R.
1128      but for the moment, only used if it does not change the results.
1129    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1130    
1131    checkpoint48c_post
1132    Modifications in treatment of initial flux forcing controls
1133    to avoid extra storing of flux fields.
1134    
1135    checkpoint48c_pre
1136    o Added tidal_basin_2d experiment (currently 1D!)
1137    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1138    
1139    checkpoint48b_post
1140    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1141     (modification to pressure gradient not yet implemented)
1142    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1143      (for U & V) that are used for vertical advection of momentum.
1144    
1145    checkpoint48a_post
1146    o In preparation for r*, use temp. array to compute vertical transport
1147       in flux-form momentum pkg. => change results of few test-exp.
1148      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1149                        lab_sea, natl_box & plume_on_slope
1150    
1151    checkpoint48
1152    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1153    
1154  checkpoint47j_post  checkpoint47j_post
1155  o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.  o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1156  o moved adexch from forward_step to addummy_in_stepping  o moved adexch from forward_step to addummy_in_stepping

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