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revision 1.27 by heimbach, Fri Jun 9 03:13:39 2000 UTC revision 1.349 by jmc, Tue Sep 21 23:20:17 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 EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
7      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
8      affects advect_cs results (for the wrong reason): update output.txt
9    o use a more standard discretization for biharmonic viscosity ;
10     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
11      affects results of dome set-up: update output.txt
12    o fix gad_advection.F (CubedSphere part), back to version 1.23
13    o fix bug in mom_vi_del2uv.F (CubedSphere part).
14    
15    checkpoint55a_post
16    o merged code to
17      * prescribe/read time-dependent open boundaries
18        (works in conjunction with exf, cal)
19      * sponge layer code for open boundaries
20      * each boundary N/S/E/W now has its own CPP option
21        (healthy for the adjoint)
22    
23    checkpoint55
24    o up-to-date adjoint of previous breaks
25      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
26      - global_ocean_ebm: adjoint still needs fix (TLM ok)
27      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
28      - carbon: * remove tr1-related adjoint verification
29                * add ptracer as control variable
30    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
31      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
32    
33    checkpoint54f_post
34    o in verification/carbin/ remove experiment related to
35      ALLOW_PASSIVE_TRACER (array tr1 etc)
36      code_ad/ input_ad/ results_ad
37    
38    o add two new packages
39      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
40        + subject to optimization (memory)
41      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
42        + subject to reordering (many GOTOs in the original code)
43        + so far opps is called for every (i,j) point, and then operates in
44          the vertical; one may want to reorder the scheme in order operate in
45          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
46          fields)
47    o overhaul of IO so that we now have flags for MDSIO and/or MNC
48      - all verification tests compile and run with linux_ia32_g77
49      - defaults are compatible with current input files--nothing
50        should change if you were not previously using MNC
51      - MNC output has been added in numerous places (eg. timeave)
52        but there are still a few writes not yet do-able with MNC
53        (this is in progress)
54      - flags now allow for either/or/both use of MDSIO and MNC and
55        documentation will soon follow
56      - numerous small formatting cleanups for ProTeX
57    o add version info (via BUILD_INFO.h) to MNC and stdout
58    
59    checkpoint54e_post
60    o add two new packages
61      - pp81 (Packanowski and Philander, 1981), Richardson number and
62        stratification dependent mixing
63      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
64      - these scheme operate in a similar manner as KPP (without ghat, of
65        course), however there is only one diffusivity that is used for both
66        temperature and salinity (and passive tracers)ç
67    o add offline package
68    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
69      provided by Stephanie Dutkiewicz
70    o genmake2: add ability to search for C compilers and cleanup test output
71      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
72    
73    checkpoint54d_post
74    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
75    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
76      leading to additional shift by 5 days each year of integration
77       (i.e. leading to considerable offset over the years)
78    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
79    o start with no AB and no initial filtering (staggerTimeStep):
80      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
81    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
82      (external loading & cpl import/export stay in forward_step.F)
83    o update coupling interface to work with new staggerTimeStep
84    o change MDSIO ptracers_pickup.
85    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
86    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
87    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
88    
89    checkpoint54c_post
90    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
91      this affects (truncation error) output.txt of test-exp:
92       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
93    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
94    o change Qnet to always be the net heat flux, (+upward).
95      affects (truncation error) output of natl_box exp.: updated
96    o define the max number of passive tracers in PTRACERS_SIZE.h
97    o start to test mnc routinely in exp0
98    o add sea-ice loading (sIceLoad) as a new forcing field.
99    
100    checkpoint54b_post
101    o add testreport "-j JOBS" option for parallel builds (tested and pretty
102       impressive on Altix and Opteron systems)
103    o diagnostics can now write NetCDF files through the mnc package
104    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
105    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
106    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
107      affects (truncation error) output of lab_sea & natl_box exp.: updated
108    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
109    
110    checkpoint54a_post
111    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
112    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
113    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
114    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
115      + internal_wave (shift in writing cg2d_ini_res)
116    checkpoint54a_pre
117    
118    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
119      - modified verification/lab_sea and natl_box_adjoint accordingly
120    
121    checkpoint54
122    checkpoint53g_post
123    o prepare splitting of thermodynamics: store convect.counter in common block
124    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
125      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
126    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
127    o new parameter "nShapS": allow to treat differently S from T (nShapT)
128    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
129    o restore adjointability
130    
131    checkpoint53f_post
132    o modifications that affect AIM experiment results (update output.txt):
133      - no advection of S at top interface Nr (pkg/generic_advdiff)
134      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
135    o AIM pkg:
136      - include stability function into surf.Flux derivative relative to Tsurf
137      - calculate clear-sky radiation & surface temp. change (for diagnostics)
138    
139    checkpoint53e_post
140    o merged cylindrical coord configuration
141    o added rotating_tank experiment
142    checkpoint53e_pre
143    
144    checkpoint53d_post
145    o faulks upgraded: re-generate output.txt that have changed:
146       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
147    o Added Bryan and Lewis, 1979, vertical diffusivity profile
148    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
149    o added Sadourny discretization of Coriolis
150      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
151      - re-enabled use of omega3 (useAbsVorticity)
152    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
153      vector-invariant equations
154      - note: does *NOT* yet use same variable visc. for no-slip BC's.
155    o recoded the lateral boundary conditions for non-hydrostatic w, this time
156      hopefully without new bugs
157      - still to do: biharmonic friction for non-hydrostatic w
158    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
159    o regenerated output for global_ocean_ebm (using -ieee)
160    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
161      of mom_common/
162      - simple re-arrangement of instructions within computing loop
163    checkpoint53d_pre
164    
165    checkpoint53c_post
166    o new version of coupler for AIM+thSIce and Ocean models
167     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
168     - land: change Evaporation of snow
169     - aim with thSIce: fix bug in snow-precip.
170    o changes to calc_gw.F
171     - bug fix for w^2 term near the bottom boundary
172     - (hopefully) improve the lateral slip boundary condtions for use with
173        partial/looped cells
174      - because the bug fix changes two verification experiments anyway (exp5
175        and plume on slope), change the lateral boundary condition from half slip
176        to the value of no_slip_sides
177    o ebm package wasnt quite up to the parallel task. Fixed that.
178    o Adjoint of EBM package + verification
179      * TLM OK
180      * ADM not sufficient accuracy yet (needs further testing)
181    
182    checkpoint53b_post
183    o Commiting new energy balance model to repository
184      * package is pkg/ebm
185      * verif. is verification/global_ocean_ebm
186      * references are in ebm_driver.F
187    C      * X. Wang, P. Stone and J. Marotzke, 1999:
188    C        Global thermohaline circulation. Part I:
189    C        Sensitivity to atmospheric moisture transport.
190    C        J. Climate 12(1), 71-82
191    C      * X. Wang, P. Stone and J. Marotzke, 1999:
192    C        Global thermohaline circulation. Part II:
193    C        Sensitivity with interactive transport.
194    C        J. Climate 12(1), 83-91
195    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
196    C        Destabilization of the thermohaline circulation
197    C        by atmospheric eddy transports.
198    C        J. Climate 7(12), 1870-1882
199    o Will need long integration testing.
200    checkpoint53b_pre
201    
202    o created pkg/mom_common in preparation for variable viscosity code
203    o renamed and split ini_mnc_io
204    o pkg/land: only liquid water can diffuse or run-off
205    o AIM using land: soil wetness availability account for snow
206    o added printMapIncludesZeros to EEPARMS namelist
207    
208    checkpoint53a_post
209    o restore TAMC compatiility for exf_constants.h
210      (no usage of _d in .h)
211    o Additional storing in KPP in an attempt to fix
212      TAMC problem with adjoint of KPP code.
213      (no success...)
214      Identical code works fine with TAF.
215    o Fixed verification/natl_box_adjoint experiments.
216      Initial conditions for Experiments 4 and 5 are now
217      set to "SEAICE_initialHEFF=0", which is more reasonable,
218      and hence gives results closer to that of Experiment 2.
219      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
220    
221    checkpoint53
222    o stable checkpoint with up to date adjoint
223      TLM tests only run for 1st grdchk at the moment. Its unclear if
224      this is a code problem or a problem with resetting code for g_
225      variables that is being autogenerated wrong.
226      Otherwise:
227       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
228       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
229         are both still in chaos following their security messes.
230    
231    checkpoint52n_post
232    o various build (mostly genmake2) changes including:
233      - ability to build/run more easily within Cygwin and MacOS X
234      - more complicated Makefiles with a stronger dependence on Gnu Make
235    o pkg/seaice modifications
236      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
237        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
238        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
239      - changed proxy for geostrophic velocity and updated
240        verification/lab_sea/results/* accordingly
241      - removed ADI dynamic solver from pkg/seaice
242      - replaced all occurrences of 1/CSTICE or 1/CSUICE
243        they caused a segmentation fault under certain circumstances
244      - removed unused field WATR
245    o bug fix in exf-package:
246      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
247         now reflect that.
248    o small fixes in the cal-package:
249      - set reference date to first of January for the 'model'-calendar
250      - failing of cal_CheckDate in cal_FullDate now actually results in a
251        warning
252    o small modifications in exf-package to increase flexibility:
253      - change climtempfreeze from a constant to a runtime parameter that
254        is specified in data.exf_clim (default = -1.9)
255      - introduce runtime parameter windstressmax (default = 2.0) that is
256        specified in data.exf
257    o fix in pkg/thsice:
258      - update Evap (Tsf changes) to be consistent with Latent heat flux
259      - maintain snow precipitation unchanged (even if Tsf >=0).
260     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
261    
262    checkpoint52m_post
263    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
264      this does not change any of the results, because myIter=0 in swfrac always
265      lead to jwtype=2 (the default anyway), but the call makes little sense
266      as a default
267    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
268    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
269      atmospheric model (AIM) to use it ; add a "slab ocean" component.
270    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
271    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
272    o extending useSingleCpuIO option to work with new exch2 I/O format
273      - old-style, missing-tile I/O is still accessible by defining CPP
274        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
275    o monitor package can write to NetCDF files and/or STDOUT
276    o fix re-definition bug in MNC_GRID_INIT_ALL()
277    o doc/api_reference added
278      - a framework for building an API Reference Manual using all
279        the "protex" comments embedded in the code
280      - see pkg/generic_advdiff, pkg/mnc for examples
281    o MNC:
282      - make myThid the last argument for all subroutines
283      - new default for the grid files: NO halos
284      - add useMNC and other run-time flags
285      - separate per-file-group handling of the unlimited dimension
286      - early initialization of MNC w/ flags read at the eeboot stage
287        and lookup tables set in initialize_fixed
288      - write all MNC output to a freshly-created directory
289    o thermodynamics sea-ice (thsice) is now tested with testreport.
290    o test exp. advect_cs: use the standard cs32 grid ; update output.
291    o Added functionality to grdchk:
292      pick global i,j,k position (or nearest wet) where to perform check.
293    
294    checkpoint52l_post
295    o new land formulation:
296      a) use ground enthalpy as prognostic variable to ensure exact
297         energy conservation.
298      b) account for water temperature and for latent heat of freezing
299         in all processes (rain, run-off, ground storage)
300      c) compute surface and ground temperature implicitly.
301    o aim_v23 modification for new land model:
302      a) Treat separately land / ocean / sea-ice surface fluxes
303         to allow implicit computation of land & sea-ice surface temp.
304      b) add snow precipitation.
305    checkpoint52l_pre
306    
307    o fix problem (when 1 tile is empty) in min/max monitor.
308    o fix bug in timeAve (u,vZetatave in common block)
309    o no restoring terms under ice for pkg/seaice
310    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
311    o bug fix for pkg/seaice pickups
312    o change MNC call locations and add coordinate attributes
313    o mask vorticity at the corner ; affects global_ocean.cs output
314    o fix ini_curvilinear_grid ; test CS experiments with mpi
315    o aim.5l_cs: modify sea-ice fraction input file ; update output
316    o exf: Adding simple range check routine for exf fields after read
317    
318    checkpoint52k_post
319    o removed top-level directory "diags"
320      - we migrated these functions to pkg/timeave a long time ago
321    o fixed bug introduced in pkg/monitor
322    o accuracy ctrlprec = 32 insuffient for gradient checks using
323      averaged fields (I/O via cost_averages)
324      -> use ctrl.h in active_file*.F to control I/O precision.
325    o paramter list of CALL ADTHE_MAIN_LOOP
326    o added initial do_the_model_io to ecco
327    o set all ...Freq to zero after cost_final
328      taveFreq, dumpFreq, pChkptFreq
329    o MAIN and ECCO differentiability restored
330    
331    checkpoint52j_post
332    o fix nchklev in tamc.h for global_ocean...
333    o Bringing flow and store directives up-to-date
334    o Really weird thing!
335      call do_the_model_io from the_main_loop with parameters
336      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
337      TAF places a faulty re-call of initialise_varia
338      after cost_final call which should not be there!
339    checkpoint52j_pre
340    
341    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
342      error messages
343    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
344    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
345      debug output
346    o modfied mdsio_writefield.F to handle non-global files under exch2
347    o update AIM Cubed-Sphere exp (aim.5l_cs):
348      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
349    o update AIM Equatorial Channel exp:
350      use standard aim_v23 pkg and change the SST fields to be more realistic.
351    o globalFile now works with exch2
352    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
353      mon_vort3.F to make exch2 friendly with >1 tile per cube face
354    o limit timeave output for hi-res integrations
355    
356    checkpoint52i_post
357    o removed CPP_EEOPTIONS.h from verification/*/code
358    o updated the tiling for global_ocean_pressure
359    checkpoint52i_pre
360    
361    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
362      the old pkg/aim).
363    
364    checkpoint52h_pre
365    o shortened offending lines in exch2_send_rx?.template
366    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
367    o genmake2: add build & execute test for NetCDF code
368    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
369      old grid files, moved CPP_EEMACROS.h to pkg/exch2
370    o added useSingleCPUIO flag to monitor.F and mon_out.F
371    o added temporary hack for sea-ice dynamics on the cube:
372      metric terms are ignored and it is assumed that
373      there is no sea-ice on cube faces 1, 2, 4, and 5.
374    
375    checkpoint52f_post
376    o added exch2 cube routines to pkg/exch2
377    o modified hs94.cs-32x32x5 to use it
378    o added new grid files to hs94.cs-32x32x5
379    checkpoint52f_pre
380    
381    checkpoint52e_post
382    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
383      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
384    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
385      to work with implicit vertical advection and AB ;
386    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
387    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
388     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
389    checkpoint52e_pre
390    
391    o fix bug in impldiff when Nr=1 or Nr=2.
392    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
393    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
394    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
395      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
396    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
397    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
398    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
399    
400    checkpoint52d_post
401    o re-tiled many expts to allow comparison in multi-processor mode
402      - updated output accordingly
403      - changed hs94.128x64x5 to use intial T from file rather than use the
404        random number generator
405    o add infrastructure in model routines for fizhi and gridalt packages
406    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
407    o changes to permit hi-res, cubed-sphere, configuration
408      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
409      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
410      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
411        of surface winds for the cube
412      (A verification experiment, based on global_ocean.cs32x15, but with
413       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
414       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
415       complete with example surface forcing files and matlab scripts to look
416       at the output and compare it with that of global_ocean.cs32x15.)
417    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
418       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
419       to conform to the common rule.
420    o check-in the first version of the coupler + interfaces for multi-components
421       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
422       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
423       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
424       - ocean and atmos. share the same horizontal grid (no interpolation).
425       - exchanges between component and coupler is done in forward_step
426    o new verification experiment, cpl_aim+ocn:
427       coupled ocean - AIM atmosphere on cs32 grid.
428    
429    checkpoint52d_pre
430    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
431    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
432    
433    checkpoint52c_post
434    o Fixing OPTIONS files for use of exf:
435      - ALLOW_ECCO not needed
436      - ECCO_CPPOPTIONS.h should not be included from
437        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
438        as has been the case in the past
439      - All cal/exf related options are currently set in
440        single header file. Should remain so until we
441        agree on a consistent new policy.
442    o Removed all CPP options for cal package.
443      cal has no more CPP options.
444    o modified STOREs in GAD_ADVECTION
445    o corrected key comp. for passkey
446    
447    checkpoint52b_post
448    o new version: "thsice" of thermodynamic sea-ice pkg:
449     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
450     - modify fluxes but do not change theta directly;
451     - light cleaning of bulk_force pkg (still needed with thsice).
452     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
453       + output_thsice.txt to test thsice & bulk_force pkgs.
454    o put back grid & coriolis monitor output.
455    checkpoint52b_pre
456    
457    o call "do_the_model_io" at the beginning (=> dump initial state)
458    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
459    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
460      (need info on NUMBER_OF_PTRACERS)
461    o missing PTRACERS headers in some routines
462    o default tamc.h in pkg/autodiff supposed to crash
463      to ensure proper customization
464    
465    checkpoint52a_post
466    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
467      - moved surfaceTendencyTice from pkg/seaice to main code
468      - subroutine FREEZE_SURFACE now limits only surface temperature
469        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
470        => new output.txt for global_ocean.cs32x15 & global_with_exf
471      - keep the old version of FREEZE for backward compatibility;
472        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
473      - corresponding modifs for TAF directives
474    o added surface flux output variables to TIMEAVE_STATVARS
475    o time-averaged output for pkg/ptracers
476    o fix problem with ECCO-related divided adjoint
477      snapshot file was missing some ad-variables,
478      but no warning issued by TAF
479    
480    checkpoint52a_pre
481    o some bug fixes for #undef REAL4_IS_SLOW
482    
483    checkpoint52 = ecco_c52_e35
484    o after testing adjoints of checkpoint51u_post
485    
486    checkpoint51u_post
487    o this is the post-merge tag of the ecco-branch
488      (needs another clean checkout and re-testing)
489    o various natl_box_adjoint configs and results
490      but no input fields
491    o obcs adjoint not yet merged!
492    o adding ECCO global 1x1 and 2x2 degree configs
493    o updated/extended some store directives for seaice
494    o pkg/ecco now containes ecco-specific part of cost function
495    o top level routines the_main_loop, forward_step
496      supersede those in model/src/
497      previous input data.cost now in data.ecco
498      (new namelist ecco_cost_nml)
499    o in ctrl/ cleaned some cross-dependencies and updated CPP options
500    
501    checkpoint51t_post
502    o this is the pre-merge tag of the ecco-branch
503    
504    checkpoint51s_post
505    o cleanup: removed various obsolete #define-s
506    o pkg/grdchk
507      - renamed 'ph-grd 3' to 'grad-res'
508      - merged from ecco-branch
509        (remaining bug fixes for obcs gradient checks)
510      - additional high-precision output for testreport
511        (grep for 'precision_grdchk_result')
512    
513    checkpoint51r_post
514    o cleaned up or removed CPP_OPTIONS.h files
515    o updated results for some of the tests to reflect the new
516      optfiles (-ieee: -O0 instead of -O3)
517    
518    checkpoint51q_post
519    o cd_code:
520      - moved cd_scheme.F -> cd_code_scheme.F
521      - separate read_checkpoint from cd_code_ini_vars.F
522      - separated cd_code part from write_checkpoint
523      - updated AD_SOURCE, generated .flow
524      - added CD_CODE_VARS.h to the_main_loop
525      - Moving cd_code specific store dir.s to pkg/cd_code
526    o ctrl package totally restructured
527      - pack/unpack now optional and decoupled from
528        xx_/adxx_ I/O
529      - ctrl_pack/unpack cleaned
530        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
531      - confined inclusion of AD_CONFIG.h to where necessary.
532    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
533    
534    checkpoint51p_post
535    o create initial cd_code package
536      - WARNING: the initialization of fields within packages
537        is broken because INI_FIELDS (where READ_CHECKPOINT is
538        called) is called *before* PACKAGES_INIT_VARIABLES.
539        This seems to be backwards since
540        1) its important to initially zero the entire field including
541           the "halo" region
542        2) zeroing needs to be done *before* reading pickup info
543           and the pickup call might or might not happen in any
544           particular run
545      - this needs an overhaul for R2
546    o cleanup verification/*/code/GMREDI_OPTIONS.h
547    o cleanup testreport
548    
549    checkpoint51o_post
550    o bringing AD-related verif's up to date with genmake2
551      - carbon/
552      - global_ocean.90x40x15/
553      - hs.94.1x64x5/
554      - (front_relax/ )
555    o (more) consistent directory structure for AD-related verif.'s
556    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
557    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
558    o bug fix in find_alpha.F for MDJWF:
559      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
560        change rho -> rho-rhoConst
561      - replace call find_rho to find_rhonum
562    o initialisation of rFlx extended to full array (required by TAF)
563      and shifted to thermodynamics
564    o removed PTRACERS.h in ptracers routine
565    o added surfacetendencyPtr to S/R parameter list pracers_forcing
566    o Correcting initialisations for fVerU, fVerV.
567    o helping TAF to recognize dependency on kUp for
568      fVerU, fVerV
569    o Replacing delZ by delR in pkg/ctrl/
570    checkpoint51o_pre
571    
572    o undid all of cp51 pending some cleanups and discussion
573    o added the [#include "AD_CONFIG.h"] statement to all files that need
574       it for adjoint/tl #defines
575     o re-worked the build logic in genmake2 to support AD_CONFIG.h
576     o removed tools/genmake since it no longer works
577    
578    checkpoint51n_post
579    o modifications to make FREEZE flux visible to pkg/kpp
580      - moved surfaceTendencyTice from pkg/seaice to main code
581      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
582      - subroutine FREEZE now limits only surface temperature
583        (this means new output.txt for global_ocean.90x40x15,
584         global_ocean.cs32x15, and global_with_exf)
585    o added surface flux output variables to TIMEAVE_STATVARS
586    
587    checkpoint51n_pre
588    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
589    o added [#include "AD_CONFIG.h"] to all files that use the following
590      defines:
591      - ALLOW_ADJOINT_RUN
592      - ALLOW_TANGENTLINEAR_RUN
593      - ALLOW_ECCO_OPTIMIZATION
594    
595    checkpoint51m_post
596    o incorporating changes to get TAMC/TAF working in genmake2
597      - added new TAMC/TAF targets to the Makefile
598      - various cleanups related to package handling
599      - these changes should have no impact on the forward model
600    
601    checkpoint51l_post
602    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
603     - faster algorithm for cal_addtime.F
604     - higher precision arithmetic, where needed
605     - pkg/exf *startdate variables changed from calendar date to
606       model integration time
607    
608    checkpoint51l_pre
609    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
610    o enable to apply restoring on S & T only in a latitude band.
611    o update output (external_forcing_surf modif. change truncation errors)
612       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
613    
614    checkpoint51k_post
615    o change default to: useNHMTerms=.FALSE.
616     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
617       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
618     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
619        exp1, ideal_2D_oce
620     - change data file of oceanic exp (leave the results unchanged for now)
621       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
622    o set gravitySign automatically according to the vertical coordinate used
623      (and change sign: back to "logical" value: +1 when R increases downward)
624    o added an include barrier to the default CPP_OPTIONS.h and
625      removed the #include "PACKAGES_CONFIG.h" from it
626    o fix a bug in mom_fluxform (from chk51j_post)
627    
628    checkpoint51j_post
629    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
630    o adjusted some flow directives (dynamics, thermodynamics)
631    o added cubed-sphere case to test cost function
632    o heckpoint_lev?_directives.h now include
633      pkg-specific directives, whenever those are enabled.
634    o Moving pkg-specific flow directives to corresponding pkg
635      Moving pkg-specific differentiation list to corresponding pkg
636      Moving pkg-specific checkpoint-lev storing to corresponding pkg
637      ---> conventions are
638           - pkg_ad.flow
639           - pkg_ad_diff.list
640           - pkg_ad_check_lev?_dir.h
641    
642    checkpoint51i_post
643    o merge of the branch-genmake2
644      - knowingly breaks the older genmake
645      - automatic generation of all ALLOW_${PKG_NAME} defines
646      - new testreport supersedes older testscript
647    o large number of package inclusion and header cleanups
648    checkpoint51i_pre
649    
650    o new output for adjoin of global ocean vector invariant
651    o fix for checkpoint of thermodynamic seaice and bulk_force
652    o Steph gchem various cleanups
653    
654    checkpoint 51h_pre
655    o fixed some single quotes
656    o modify gchem pkg to be more versatile
657    o modifications to clean up dic pkg
658    o add pkg/cfc
659    
660    checkpoint51g_post
661    o provide links for ARPACK and ADM*TLM
662    o start removing verification/vero/
663    o update AD-related stuff
664      (in particular some IF-statements in model/src/ routines)
665    o adding to verification/global_ocean.90x40x15/ adjoint of
666      vector invariant setup
667    
668    checkpoint51f_post
669    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
670    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
671      of tracer Green's fucntions for ocean inversion project.
672    
673    checkpoint51f_pre
674    o Added on-the-fly spatial interpolation capability
675        "USE_EXF_INTERPOLATION" to pkg/exf.
676      - This is a temporary Cartesian-grid hack until
677        the super-duper ESMF coupler becomes available.
678      - See verification/global_with_exf/README for usage example.
679      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
680        flags and modified pkg/seaice accordingly.
681    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
682        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
683        non-local transport term.
684    
685    checkpoint51e_post
686    o pkg/mom_vecinv:
687      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
688      - add time-ave diagnostic of vorticity advection.
689    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
690    o atmospheric geopotential: - include water vapor effect;
691                                - use p^kappa in p* scaling.
692    o land pkg: read initial state from files.
693    o AIM : add stratospheric drag in the upper level
694    
695    checkpoint51d_post
696    o change function ILNBLNK (=> last non-blank char.) to return zero
697      (instead of the string length) when the string. char is empty
698    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
699    o modif's to restore TAMC compatibility
700      - avoid "_d" constructs in PARAMETER declarations
701      - avoid interrupting lines by comment lines
702    o Use cluster local disks for purely local I/O
703      vs. globally visible disks needed for ctrl stuff
704      (merged from ecco-branch)
705      - new active_file_loc... and mdsio_..._loc routines
706      - affected packages: autodiff, ctrl, grdchk, mdsio
707    
708    checkpoint51c_post
709    o introducing integer flag debugLevel
710      - debLevZero: suppress all output
711      - debLevA: standard
712      - debLevB: equivalent to current debugMode=.TRUE.
713    o introducing pathname variable mdsioLocalDir for mdsio
714      that can be specified at runtime
715      (relevant for cluster I/O to local disk)
716    `
717    >>>checkpoint51b_post
718    adjoint of ptracers
719    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
720    o extended state in checkpoint_lev?, etc.
721    o alternative ctrl/cost with tr1 or ptracer
722    o new comlev1_bibj_ptracers
723    o new ptracers.flow
724    o made ptracers_forcing same as external_forcing_s
725    o added verification for adjoint with ptracers
726      - adm. grdchk fail so far
727      - tlm. grdchk OK
728      - checked tapelev/comlev recomputations: OK
729    <<<checkpoint51b_pre
730    
731    checkpoint51a_post
732    o added code for biogeochemistry package
733      - new pkgs: dic, gchem
734      - new subroutine in ptracers
735    o modify code for biogeo packages
736      - in model/src and pkg/ptracers
737    
738    checkpoint51
739    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
740      - autodiff, ctrl, exf, grdchk, seaice
741      kept separate packages
742      - cost, ecco, obcs
743    o updating verification/internal_wave, verification/lab_sea
744      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
745    
746    checkpoint50i_post
747    o Preparing next differentiable checkpoint and sync
748      of MAIN vs. ecco-branch
749      - 1st step: this one is differentiable
750      - 2nd step: next(! not this) checkpoint will have updated packages
751                  from ecco-branch)
752    
753    checkpoint50h_post
754    o new package "land": provide surface BC for AIM.
755    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
756    o AIM: use true log-P extrapolation for near surface temp (= as in
757        F.Molteni paper) ; update aim.5l_cs output.
758    o New variable in PARM03 for more flexible pickups
759    o somewhat cleaned package initialisation sequence for
760      ctrl/ cost/ ecco/ in packages_... routines
761    
762    checkpoint50g_post
763    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
764      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
765      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
766        made the default because of faster convergence than ADI
767    
768    checkpoint50f_post
769    o exf totally restructured
770      - replaced all exf_set_ routines by one generic exf_set_gen.F
771        and made sure it's still differentiable
772      - split exf_getffields.F into new exf_bulkformulae.F
773      - exf_inscal_/exf_outscal_ suffixes consistent with field names
774      - updated adjoint/makefile and relevant verif. accordingly
775    
776    checkpoint50f_pre
777     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
778          + change Evap over land. (update aim.5l_cs output)
779     o added missing .cvsignores and made uniform across expts
780     o changed configuration of tidal_basin_2d expt
781     o added pkg/debug functions for tracing code in fatal crashes
782     o tidied pkg/monitor to use MONITOR_OPTIONS.h
783     o new fn in pkg/monitor to stop model if solution grows too big
784     o removed lots of single quotes from comments
785    
786    checkpoint50e_post
787    o make KPP work with PTRACERS
788     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
789       nearly a copy of kpp_transport_s
790     - there is no analogue to SurfaceTendencyS, so I have to use
791       gPtr(of the surface layer) instead
792    o add a new platform SunFire+mpi (SunFire 15000) to genmake
793    checkpoint50e_pre
794    
795    checkpoint50d_post
796    o change kpp output from multiple-record state files to single-record state
797      files analogous to write_state.F
798    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
799      analogous to the cg2d-related output.
800    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
801      so that writing to internal file fn (with length 512) fails.
802    checkpoint50d_pre
803    
804    checkpoint50c_post
805    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
806    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
807    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
808    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
809    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
810    
811    checkpoint50c_pre
812    Merging from release1_p13:
813    o bug fix for pkg/seaice dynamic solver
814    o Added SEAICE_initialHEFF to pkg/seaice
815    
816    checkpoint50b_post
817    o store u*,v* in gU,V instead of in guNm1,gvNm1
818    o in order to put the momForcing out of the Adams-Bashforth:
819      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
820      to timestep.F
821    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
822    o re-generate output for highly sensitive test-exp:
823       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
824    
825    checkpoint50b_pre
826    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
827    o corrected CPP option mismatch in exf_Bulk... functions for case
828      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
829    
830    checkpoint50a_post
831    o Bug fix for merging between c50 and KPP.
832      ikey was passed from thermodynamics to kpp_calc via
833      common block rather than being recomputed in kpp_calc,
834      in contradiction with new key itdkey.
835      New key ikppkey created, and tamc.h headers updated.
836    
837    checkpoint50
838    - 2nd step of merge with ecco-branch:
839      merge changes in ecco-branch back into main trunk
840    - bug fix in find_alpha
841    - more storing in gmredi_calc_tensor.F, kpp_routines.F
842    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
843    - merged some sliced AD support routines
844    
845    checkpoint49
846    merged from ecco-branch:
847    o exf:
848      - Enable initialisation of forcing fields to constant
849        (runtime) values.
850      - in exf_getffields.F
851        Reduce i-/j-loop to interior domain, discarding overlaps.
852        That also fixes wrong TAF-key computations for key_1, key_2
853        with bulf formulae.
854      - exf_init.F modify #ifdef for exf_init_evap
855      - exf_getffieldrec.F, ctrl_getrec.F
856        The following INT-usages are not safe:
857          fldsecs  = int(fldsecs/fldperiod)*fldperiod
858          fldcount = int(fldsecs/fldperiod) + 1
859        and were modified.
860    o autodiff: checkpoint_lev...
861      - updated storing for bulk formulae (some arrays were missing)
862      - added state for seaice package
863      - synchronized with main branch
864    o DIVA:
865      Modif.s in
866      - the_main_loop.F
867      - the_model_main.F
868      and added cost_final_restore.F cost_final_store.F
869      o With these changes, it is possible to fully separate
870        the first forward run to compute the cost function (mdthe_main_loop)
871        and adjoint runs over individual DIVA intervals (adthe_main_loop)
872        into separate model executions.
873        This enables better tuning of DIVA to given queue sizes.
874      o Loss of cost function value in consecutive DIVA runs is
875        fixed by storing to 'costfinal' file.
876      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
877        beginning/end of adjoint integration is accounted for.
878      The current changes apply to TAF-1.4.26.
879      TAF has one remaining bug, requiring one manual change
880      (see MITgcm manual).
881    o cal: synchronized between MAIN and ecco-branch
882    
883    checkpoint48i_post
884    o Changes to restore differentiability of code w.r.t. previous tag
885      (mostly adding new routines to make list and replacing
886      pressure by totPhiHyd).
887    o Updated and merged grdchk package
888      - has both ADM and TLM checks
889      - works for single- and multi-proc.
890      - output cleaned
891      - worked successfully for parallel DIVA
892    o genmake:
893      - Adding -platform=SP4
894      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
895    o Modif. for DIVA:
896      ctrl_unpack should not be called in intermediate DIVA interval.
897      (similar thing would apply for active files such as
898      tbar, sbar, psbar, which should not be reinitialised;
899      only relevant for ecco-branch)
900    
901    checkpoint48h_post
902    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
903    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
904    o Added SEAICE_initialHEFF to pkg/seaice
905    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
906    
907    checkpoint48g_post
908    --- EOS:
909    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
910      store total Potential in totPhyHyd for diagnostics & EOS.
911    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
912    --- Pressure/geopotential gradient:
913    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
914    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
915      ( changes results of global_ocean_pressure )
916    o NLFS + z-coord.: add eta*Rho' contribution.
917    o accurate phiHyd when using interface-W at the middle between 2 centers
918     ( changes results of ideal_2D_oce )
919    o includes r* 2nd term in potential gradient.
920    
921    checkpoint48f_post
922    Merging from release1_p12:
923    o Modifications for using pkg/exf with pkg/seaice
924      - improved description of the various forcing configurations
925      - added basic radiation bulk formulae to pkg/exf
926      - units/sign fix for evap computation in exf_getffields.F
927      - updated verification/global_with_exf/results/output.txt
928    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
929      (SBO) core products, including oceanic mass, center-of-mass,
930      angular, and bottom pressure (see pkg/sbo/README.sbo).
931    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
932      to avoid negative values in shallow regions.
933      - updated verification/natl_box/results/output.txt
934      - updated verification/lab_sea/results/output.txt
935    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
936    o Added useSingleCpuIO option (see PARAMS.h).
937    o Updated useSingleCpuIO option in mdsio_writefield.F to
938      work with multi-field files, e.g., for single-file pickup.
939    o pkg/seaice:
940      - bug fix in growth.F: QNET for no shortwave case
941      - added HeffFile for specifying initial sea-ice thickness
942      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
943    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
944      kpp_transport_t.F, forward_step.F, and the_main_loop.F
945    o pkg/seaice:
946      - adjoint-friendly modifications
947      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
948    
949    checkpoint48e_post
950    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
951    o dynamics: change definition of computational domain & adapt mom_fluxform
952      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
953    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
954        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
955        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
956        global_ocean.90x40x15 global_with_exf global_ocean_pressure
957        inverted_barometer solid-body.cs-32x32x1
958      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
959    
960    checkpoint48d_post
961    o in preparation for r*:
962     a) use pre-computed gradient of hydrostatic potential:
963        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
964     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
965        => affects results of glob_oce_pressure (different truncation error)  
966      update output.txt of ideal_2D_oce & global_ocean_pressure
967    
968    checkpoint48d_pre
969    o in preparation for r*:
970      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
971      pass the 2 comp. of the grad. as arguments to momentum S/R.
972      but for the moment, only used if it does not change the results.
973    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
974    
975    checkpoint48c_post
976    Modifications in treatment of initial flux forcing controls
977    to avoid extra storing of flux fields.
978    
979    checkpoint48c_pre
980    o Added tidal_basin_2d experiment (currently 1D!)
981    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
982    
983    checkpoint48b_post
984    o r* coordinate added in #ifdef NONLIN_FRSURF block.
985     (modification to pressure gradient not yet implemented)
986    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
987      (for U & V) that are used for vertical advection of momentum.
988    
989    checkpoint48a_post
990    o In preparation for r*, use temp. array to compute vertical transport
991       in flux-form momentum pkg. => change results of few test-exp.
992      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
993                        lab_sea, natl_box & plume_on_slope
994    
995    checkpoint48
996    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
997    
998    checkpoint47j_post
999    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1000    o moved adexch from forward_step to addummy_in_stepping
1001    o added exch in ctrl_map_...
1002    o aveFreq.=0. at end of cost_final to avoid overwrite in
1003      reverse checkpointing loop
1004    o Yet more changes in gmredi:
1005      * adgmredi_calc_tensor
1006        avoiding all recomputation of gmredi_slope_limit
1007      * adgmredi_x/y/rtransport
1008        added flag for excessive storing to avoid recomp. of
1009        u/v/rtans, dTdx/y/z
1010        -> this is not really necessary and very memory-consuming
1011      * adgmredi_slope_psi:
1012        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1013      * gmredi_slope_limit
1014        re-activated full calculation of taperfct for case 'ac02'
1015    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1016    
1017    checkpoint47i_post
1018    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1019    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1020      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1021    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1022    o gmredi: fix few bugs.
1023    
1024    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1025    This will be a good checkpoint to plug into the ecco-branch.
1026    o few modif.'s to get latest version adjointed
1027      (mainly kick out code in ini_linear_phisurf)
1028    o modif's to run adjoint with exactConserv
1029    o case GM_BOLUS_ADVEC should be cleaned
1030      S/R gmredi_slope_psi should be cleaned
1031    o verification/carbon now has exactConserv=.TRUE.
1032    
1033    checkpoint47g_post
1034    o time-average AIM output: becomes independent from statvars time-average
1035      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1036    o After TAF bug fix:
1037      Tested adjoint of gmredi package.
1038      Tests were done with checkpoint47 rather than with latest
1039      checkpoint47f_post since the latter is broken for the adjoint
1040      verification/carbon/ contains both ADM and TLM gradient checks.
1041    Here they are, before they get changed/lost/stolen.
1042    Mostly modif.'s to fix numerical sensitivities.
1043    Gradient checks OK for
1044    - GM_taper_scheme:
1045      * clipping
1046      * ac02
1047      * linear
1048      * glw91
1049      * dm95
1050      * ldd97
1051    - GMREDI_OPTIONS:
1052      * GM_VISBECK_VARIABLE_K
1053      * GM_NON_UNITY_DIAGONAL
1054      * GM_EXTRA_DIAGONAL
1055      * GM_BOLUS_ADVEC
1056    in conjunction with data.gmredi parameters to be checked in
1057    in a few minutes under verification/carbon/code/
1058    
1059    checkpoint47f_post
1060    Merging from release1_p10:
1061    o modifications for using pkg/exf with pkg/seaice
1062      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1063        and SEAICE_EXTERNAL_FLUXES
1064      - pkg/exf CPP options EXF_READ_EVAP and
1065        EXF_NO_BULK_COMPUTATIONS
1066      - usage examples are Experiments 8 and 9 in
1067        verification/lab_sea/README
1068      - verification/lab_sea default experiment now uses
1069        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1070    
1071    checkpoint47e_post
1072    o created a tag prior to creating a branch
1073    
1074    checkpoint47d_post
1075    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1076      at the bottom boundary had an erroneous half slip boundary condition
1077    o added bottom drag and no slip boundary condition capabilities to
1078      oceanic pressure coordinates code
1079    o added new verification experiment global_ocean_pressure, this experiment is
1080      also described in the tutorial section of the manual
1081    checkpoint47d_pre
1082    
1083    checkpoint47c_post
1084    o Added a verification experiment for a global cubed-sphere ocean run
1085      -  verification/global_ocean.cubed32x32x30
1086      -  uses pkg/therm_seaice and pkg/bulk_forcing
1087    
1088    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1089    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1090      when using P-coordinate; only implemented for atmospheric config.
1091    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1092      NOTES: requires option NONLIN_FRSURF to be "#define".
1093    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1094    
1095    checkpoint47b_post
1096    Merging from release1_p9:
1097    o pkg/seaice
1098      - removed GOTO's and added taf directives
1099      - double precision constants to reduce the g77 (Linux)
1100        to F77 (SGI) differences reported in release1_p8
1101    o tools/genmake
1102      - added SGI options
1103    o verification/testscript
1104      - updated to that of checkpoint47a_post
1105    o verification/global_ocean.90x40x15/input/eedata
1106      - modified for SGI f77 compatibility
1107    o verification/lab_sea
1108      - added description of sea-ice model
1109      - added missing matlab routines
1110      - added test of thermodynamics parallelization
1111    
1112    checkpoint47a_post
1113    o new pkg: aim_v23
1114     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1115       for now, keep the same surface forcing as before.
1116     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1117     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1118     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1119    o add diagnostic of surface correction term in monitor output
1120    
1121    o bulk_force and therm_seaice
1122    - Two packages:  bulk_force (Bulk forcing)
1123      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1124    - Earlier integration from Stephaine Dutkiewicz
1125      and Patrick Heimbach.
1126    - Two ifdef statements for compile time,
1127       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1128    
1129    checkpoint47
1130    differentiable version of checkpoint46n_post
1131    o bug fix in quasihydrostaticterms
1132    o * "clean" adjoint code (in terms of extensive recomputations)
1133        can now be obtained for all GMREDI options (i.e. for
1134        - GM_VISBECK_VARIABLE_K
1135        - GM_NON_UNITY_DIAGONAL
1136        - GM_EXTRA_DIAGONAL
1137        - GM_BOLUS_ADVEC )
1138      * However, wrong gradient check problem remains unsolved.
1139      * New CPP options have been introduced for different
1140        tapering schemes
1141    o external_fields_load now part of differentiation list
1142    o pressure needs multiple storing;
1143      would be nice to have store_pressure at beginning or
1144      end of forward_step, e.g. by having phiHyd global (5-dim.)
1145      (NB: pressure is needed for certain cases in find_rho,
1146      which is also invoked through convective_adjustment).
1147    o recomputations in find_rho for cases
1148     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1149    o #define ATMOSPHERIC_LOADING should be differentiable
1150    o ini_forcing shifted to begining of initialise_varia
1151    o Incorporating QNVS line search routines into MITgcm
1152      (this is separate code, and therefore not under pkg)
1153      lsopt/, optim/
1154    o Updated verification/carbon/
1155      - #define GM_VISBECK_VARIABLE_K
1156      - GM_taper_scheme    = 'ldd97'    
1157    
1158    checkpoint46n_post
1159    Merging from release1_p8:
1160    o verification/natl_box:
1161      updating new external_fields_load routine
1162    o New package: pkg/seaice
1163      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1164      The sea-ice code is based on Hibler (1979-1980).
1165      Two sea-ice dynamic solvers, ADI and LSR, are included.
1166      In addition to computing prognostic sea-ice variables and diagnosing
1167      the forcing/external data fields that drive the ocean model,
1168      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1169      The implied surface heat flux is then stored in variable
1170      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1171      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1172      non-local transport term.  Because this call precedes model
1173      thermodynamics, temperature under sea-ice may not be "exactly" at
1174      the freezing point by the time theta is dumped or time-averaged.
1175      N.B.: fairly large differences in accuracy occur across
1176            different platforms/compilers; comparison between
1177            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1178            generated output gives:
1179       T           S           U           V
1180      C D M    c        m  s        m  s        m  s        m  s
1181      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1182      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1183      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1184    
1185      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1186    o GAD:
1187      - generated new common blocks to account for call of
1188        same gad routines with differing traceridentities
1189        (needed to modify tracerIdentity indices in GAD.h)
1190      - generated separate common blocks for case useCubedSphereExchange
1191        (Department of Futurology)
1192      - parameter lists to gmredi_?transport: added tracerIdentity
1193      - added new key indices to tamc.h
1194    o external_fields_load:
1195      - added this routine to TAF list
1196      - needed to make some common blocks global and additional storing
1197        along the same lines as exf package (checkpoint_lev?_directives.h)
1198    o exf:
1199      updated external forcing package
1200      - bug fixes carried over from ecco-branch
1201        (missing OBCS_OPTIONS.h in two routines)
1202      - enable easy to use "no forcing".
1203      - added exf I/O for atmospheric loading
1204      - added exf I/O for runoff data
1205      - transfered scaling between exf <-> MITgcm to exf namelist
1206    o Adding new verification experiment global_with_exf.
1207      This verification experiment is almost identical to the
1208      global_ocean.90x40x15 experiment, except that it uses
1209      the exf (and cal) package instead of the
1210      external_fields_load routine (cf README file).
1211    
1212    checkpoint46m_post
1213    o modified testscript to return -- when there are no lines of "%MON" output
1214    o added new flag "quasiHydrostatic" for QH mode
1215      and new routine quasihydrostaticterms()
1216    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1217      New routine: mom_u_coriolis_nh()
1218    o fixed sign of non-hydrostatic metric terms in u and v equations.
1219      Depend on correct sign of gravitySign.
1220    o added work.pc* to .cvsignore in aim directories using ifc
1221    o introduced flag for controllin non-hydrostatic metric terms
1222    o removed gravitySign from PARM04
1223    o switched to g77/ifc from pgf77 in aim experiments
1224    
1225    checkpoint46l_post
1226    o made convective adjustment work with pressure coordinates:
1227     - changed the direction of k-loop in convective_adjustment.F for the
1228       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1229     - adjusted the reference pressure k-index in convective_adjustment.F
1230     - adjusted the convection condition in convect.F (in analogy to
1231       calc_ivdc.F)
1232     - convective_adjustment no longer computes anything on the halos
1233     - removed the warnings about negative salinity from find_rho.F and
1234       find_alpha.F; instead the new routine look_for_neg_salinity, called
1235       at the beginning of find_rho, find_alpha, and find_beta, does a
1236       check of the entire slice, if CPP-option
1237       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1238    checkpoint46l_pre
1239    
1240    checkpoint46k_post
1241    o fixed the verification/global_ocean.90x40x15 experiment:
1242     - new bathymetry (the world according to A., JMC, and M.)
1243     - new initial fields and forcing fields (*.bin files)
1244     - new POLY3.COEFFS (for the next release one should switch to a full
1245       equation of state: JMD95P or MDJWF)
1246     - fixed several errors and redundancies in the data file
1247     - experiment uses looped cells
1248     - added matlab directory with diagnostic scripts for plotting of output
1249    
1250    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1251     - read AIM physics parameters from a file (data.aimphys)
1252     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1253    
1254    checkpoint46j_post
1255    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1256    o move wVel computation at the end of the time step, in S/R integr_continuity
1257    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1258    o update timeave pkg for wVel diagnostic.
1259    checkpoint46j_pre
1260    
1261    checkpoint46i_post
1262    o Clean up AIM package (and keep the results unchanged):
1263      include CPP_OPTION and use IMPLICT NONE in all routines ;
1264      declare all the variables _RL ; use _d 0 for all numerical constants.
1265      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1266    
1267    checkpoint46h_post
1268    o cleaned up the use of rhoNil and rhoConst.
1269      - rhoNil should only appear in the LINEAR equation of state, everywhere
1270        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1271        and the dynamical equations are all divided by rhoConst
1272    o introduced new parameter rhoConstFresh, a reference density of fresh
1273      water, to remove the fresh water flux's dependence on rhoNil. The default
1274      value is 999.8 kg/m^3
1275    o cleanup up external_forcing.F and external_forcing_surf.F
1276      - can now be used by both OCEANIC and OCEANICP
1277    checkpoint46h_pre
1278    
1279     Added code to convert surface volume flux (fresh water) into
1280     a mass flux when using P coordinates in the ocean (OCEANICP).
1281     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1282    
1283    checkpoint46g_post
1284    o Include a new diagnostic variable phiHydLow for the ocean model
1285      - in z-coordinates, it is the bottom pressure anomaly
1286      - in p-coordinates, it is the sea surface elevation
1287      - in both cases, these variable have global drift, reflecting the mass
1288        drift in z-coordinates and the volume drift in p-coordinates
1289      - included time averaging for phiHydLow, be aware of the drift!
1290    o depth-dependent computation of Bo_surf for pressure coordinates
1291      in the ocean (buoyancyRelation='OCEANICP')
1292      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1293        Theta, Salinity, and Pressure in the parameter list. This routine is
1294        presently contained in find_rho.F. This routine does not give the
1295        correct density for 'POLY3', which would be a z-dependent reference
1296        density.
1297    o cleaned up find_rho
1298      - removed obsolete 'eqn' from the parameter list.
1299    o added two new verification experiments: gop and goz
1300      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1301    checkpoint46g_pre
1302    
1303    checkpoint46f_post
1304    o Enable tangent linear (forward mode) gradient checks:
1305      - extended active file handling to g_... files
1306      - added TANGENT_SIMULATION to theSimulationMode
1307      - extended grdchk package accordingly
1308    o added tangent linear setup in verification/carbon/code_ftl
1309    o added adjoint setup in verification/front_relax/code_ad
1310    
1311    checkpoint46e_post
1312    o Added new equation of state -> MDJWF
1313      - EOS of McDougall et al., 2002, JAOT, submitted
1314      - caveat: the equation of state is only valid for a smaller (more
1315        realistic?) range of values than JMD95P/Z and UNESCO
1316      - added masks to the calculation of pressure in store_pressure
1317      - added more check values for density in check_eos (ini_eos.F), some of
1318        the old check values are out of the range of the MDJWF-eos, so don't
1319        expect perfect matches for those
1320    checkpoint46e_pre
1321    
1322    checkpoint46d_post
1323    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1324      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1325      case of pressure coordinates. eosType='JMD95Z' in
1326      combination with buoyancyRelation='OCEANICP' now causes an error.
1327    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1328      in find_alpha/beta.
1329    checkpoint46d_pre
1330    
1331    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1332      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1333    
1334    checkpoint46c_post
1335    o Changes necessary for ocean in p-coordinates
1336     -  Added new buoyancy relation = 'OCEANICP'
1337     -  Added new parameters = gravitySign (this used to be contained inside
1338        the factor dRdZ which I added when we first switched to R coordinates).
1339     X GM/Redi is not compatible (yet)
1340     X bottom drag and no-slip need to be debugged.
1341    checkpoint46c_pre
1342    
1343    checkpoint46b_post
1344    o Added new equation of state -> JMD95Z and JMD95P
1345      - EOS of Jackett and McDougall, 1995, JAOT
1346      - moved all EOS parameters into EOS.h
1347      - new routines ini_eos.F, store_pressure.F
1348    o Added UNESCO EOS, but not recommended because it requires
1349      in-situ temperature (see JMD95)
1350    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1351      unesco.f to be used with POLY3
1352    checkpoint46b_pre
1353    
1354    checkpoint46a_post
1355    o Added (atmospheric) pressure loading
1356      - new field in FFIELDS.h, etc...
1357      - new cpp flag ATMOSPHERIC_LOADING
1358    o Changed hFacC to _hFacC in calc_phi_hyd.F
1359    o Added SHORTWAVE_HEATING to some files for consistency
1360    checkpoint46a_pre
1361    
1362    checkpoint46
1363    further merges from release1_p5
1364    o new ctrl package
1365      - adopted from ECCO environment to enable optimization
1366      - added Eliassen Palm fluxes to controls
1367    o added Eliassen Palm flux controls to gradient check package
1368    o cost package
1369      - Compatible with new ctrl package
1370      - added Eliassen Palm cost hooks
1371      - modif's of existing cost functions
1372    o Adjoint-related bug fixes in kpp:
1373      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1374      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1375    o autodiff package
1376      - flow directives:
1377        + new for S/R do_the_model_io
1378        + enhanced for S/R checkpoint
1379        + new gmredi.flow
1380      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1381        disable adcommon.h/g_common.h by default.
1382      - fixed problem for adjoint of global_max
1383    o modified verification/carbon/
1384    o New setup for adjoint of global_ocean
1385    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1386    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1387    o incorporated hooks for sponge layer code (external_forcing.F)
1388    
1389    checkpoint45d_post
1390    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1391    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1392      (affects plume_on_slope "cg2d" output)
1393    o add new parameter deltaTfreesurf for free-surface time stepping
1394    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1395    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1396    o change phiMin in exp1 (to agree with documentation)
1397    o add new flags:
1398     - T,S forcing inside/outside Adams-Bashforth
1399     - turn off temp,salt advection and/or forcing
1400     - for each tracer, define internal flag for multiDimAdvection & A-B
1401    o monitor: change definition of KE to check conservation of Energy
1402    
1403    checkpoint45c_post
1404    o Removed f90 comments ("!")
1405    o Modified initialisations to enable exf package for MITgcm
1406      (without invoking ECCO_PACKAGE).
1407    o modifications to gradient check package (Martin Losch)
1408      - enable centered differences
1409      - modified format of standard output
1410    
1411    checkpoint45b_post
1412    o cleaned exchange calls in cg2d
1413    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1414    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1415      to configure barotropic setup (Martin Losch)
1416    o moved some initialisations within bi,bj loop in dynamics
1417      (TAF flow dependency)
1418    o in initialise_varia, moved call packages_init_variables
1419      before convective_adjustment_init
1420      (corresponding adjustment of TAF tape initialisation).
1421    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1422    
1423    checkpoint45a_post
1424    o compute Rho over the whole domain (extend iMin,jMin indices)
1425    o specific exchange for X-slice domain (case Ny=1)
1426    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1427    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1428    
1429    checkpoint44h_post = checkpoint45
1430    o Fix to restore differentiability:
1431      place at which packages_init_variables is called in
1432      initialise_varia is crucial for reverse control flow.
1433    o modifications in GMRedi to enable stable adjoint
1434      (corresponding modif's in thermodynamics, dynamics)
1435    o added missing hook for sponge layer code in external_forcing
1436    o modified test cost functions
1437    o storing in gad_advection (plus removal of write(0,*)!
1438    o missing headers TR1.h added in convective_adjustment routines
1439    o errorMessageUnit set non-equal zero in eeboot
1440      (conflict on some platforms, e.g. IBM SP3)
1441    o modified carbon verif.
1442    
1443    checkpoint44h_pre
1444    o vertical grid option: allow to put the Interface at the middle between
1445      2 cell-centers ; replace delZ in pkg/kpp by drF.
1446    o GM Advective form: Tracers are advected using the residual transport (=
1447      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1448    
1449    checkpoint44g_post
1450    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1451      results) ; ifdef missing in thermodynamics.F
1452    
1453    checkpoint44f_pre,checkpoint44f_post
1454    o added PTRACERS package
1455      This allows an arbitrary number of passive tracers to be integrated
1456      forward simultaneously with the dynamicaly model.
1457      + Implemented so far:
1458        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1459        - I/O and checkpointing
1460        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1461      + Not implemented so far:
1462        - KPP
1463        - OBCS
1464      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1465        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1466        line in data.pkg.
1467      + This package is disabled by default since it increases storage.
1468    
1469    
1470    o testscript: added -cleanup option
1471    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1472                 b) enable to filter 2D fields.
1473    
1474    checkpoint44e_pre,post
1475    o re-wrote convective adjustment to use pre-calculated weights
1476      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1477      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1478      Original calls to convect() still in place.
1479    
1480    chkpt44d_pre,post
1481    o added missing EXCLUDE_MONITOR flags
1482    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1483      (incompatible typ in MIN/MAX expressions caused problems
1484      on IBM SP3)
1485    o in genmake added variable MAKEDEPEND
1486      plus resetting for case SunOS
1487    o added timer_stats.c routine for IBM SP3
1488    o removed variables in dynamics
1489    !!! I forgot to create tag chkpt44d_pre !!!
1490    !!! But chkpt44d_pre = chkpt44c_post    !!!
1491    
1492    o real fresh water flux implemented with non-linear free-surface.
1493    
1494    chkpt44c_pre,post
1495    o few fix (mask in shap_s2, EmPmR in external_field_load,
1496      USE_NATURAL_BCS in solve_for_P);
1497    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1498    
1499    checkpoint44b_pre/_post
1500    o merge of relevant stuff from the ecco-branch:
1501      - genmake: removed $S64 overwrite for case SunOS
1502      - pkg/exf: update and corrections for field swapping and obcs
1503      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1504                  harmonized between ECCO and MITgcm
1505      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1506                      updated checkpointing_lev... lists for obcs
1507      - model/src: minor changes in forward_step, plot_field
1508                   added directive for divided adjoint in the_main_loop
1509      - pkg/mdsio: added mdsio_gl_slice
1510    
1511    o check parameters & config (chkpt44a_pre,post)
1512    o OBC and NonLin_FrSurf.
1513    
1514    checkpoint44
1515    o fix bug in mom_vi_del2uv
1516    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1517    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1518    o update AIM experiments (NCEP input files)
1519    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1520    o added some stuff for AD
1521    
1522    checkpoint43
1523    o added two new advection tests
1524    o added global 4x4 degree ocean test
1525    o added test of H&S94 with free surface on cube
1526    o some final mods for gradient check, adjoint,...
1527    
1528    checkpoint42
1529      Fixed AD-related problems:
1530    o Store directives up-to-date with re-arranged Adams-Bashforth
1531      (mainly thermodynamics.F)
1532    o New store directives for multi-dim. advection schemes
1533      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1534      * new common block and key passkey
1535      (mainly gad_advection.F)
1536    o Modified store directives for split of dynamics/thermodynamics
1537      for the case ALLOW_KPP
1538    o Cleaned argument list for timestep_tracer.F
1539    
1540    checkpoint41
1541    o re-formatted/added comments in prologues of key subroutines
1542      to work with protex
1543    
1544    checkpoint40
1545    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1546    o added FLT (floats) package from Arne along with demo. experiment
1547    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1548      implementation of forward-in-time forcing terms
1549    o more mods for non-linear free-surface including new variable
1550    o modified multi-dim method to work on cube
1551    o bug fix in KPP (from DM)
1552    
1553    checkpoint40pre9
1554    o added DST advection schemes
1555    o fix MPI bug on SGI's
1556    o modifications for non-linear free-surface
1557    o fixed conditionals for fixed flow/passive tracer only mode
1558    o added tension/strain form of stress tensor
1559    o changes to commenting of arguments for TAF/TAMC
1560    o added/updated many matlab scripts
1561    o added multi-dimensional advection method for tracers
1562      
1563    checkpoint40pre8
1564    o new package rw/
1565      Added method for dumping intermediate local arrays:
1566      mdsio_writetile - same as mdsio_writefield except works from inside
1567                        bi,bj loop
1568      mdsio_writelocal - same as mdsio_writetile except works for local
1569                         arrays
1570      write_local_r? - higher-level wrapper for mdsio_writelocal
1571      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1572      Example given at end of mom_vecinv.F that dumps some local arrays.
1573    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1574      control flux-form versus vector invariant code.
1575      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1576      or genmake -DISABLE ...
1577    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1578      (additional storing is now needed for case vecinv;
1579      currently nothing implemented to switch this storing off
1580      in case fluxform is used since no CPP flag available).
1581    
1582    checkpoint40pre7
1583    o bug fix in dynamics.F
1584      calc_viscosity called before k=1,Nr loop.
1585    o added some #ifdef's ALLOW_PASSIVE_TRACER
1586    o cleaned initialisations in ctrl_map_ini
1587      related to TAF
1588    
1589    checkpoint40pre6
1590    o split dynamics into thermodynamics & dynamics
1591    o corresponding split of calc_diffusivity into
1592      calc_diffusivity, calc_viscosity
1593      (kpp_calc_diff, kpp_calc_visc).
1594    o Added diffkr, kapgm to control variables
1595    o bug fix in gmredi_slope_limit for ldd97
1596    
1597    checkpoint40pre5
1598    o proper initialization of Adams-Bashforth time stepping
1599      + uses forward step for very first step of model (iter=0)
1600    o re-generated *all* output since almost all output is modified by this
1601      change (sorry but we've been putting this one off for about 2 years)
1602      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1603        *not* regenerated since they are already out of date and I don't
1604        want to create the impression that they are suddenly working.
1605    o removed KAP stuff for DEC's
1606    o modified/added many .cvsignore files in */code and */input
1607    o added new expt "solid-body.cs-32x32x1"
1608      + this uses an alternative form of ini_curvilinear_grid.F which
1609        is not necessarily any better than the current one...
1610    
1611    checkpoint40pre4
1612    o added re-initialisations of utrans,vtrans,rtrans in
1613      calc_common_factors which are crucial for TAF.
1614    o extended iMin,jMin range for calc_common_factors,
1615      calc_diffusivity
1616    o added option ALLOW_PASSIVE_TRACER
1617    o a few minor updates and fixes
1618    
1619    checkpoint40pre3
1620    o created calc_gtr1.F for gad package
1621    o split the_main_loop and re-introduced forward_step
1622    o some recomputations of nIter0 for TAMC
1623    
1624    checkpoint40pre2
1625    o Updated to latest branch of AJA, JMC
1626    o Added gradient check package
1627    o Added routines for passive tracer handling
1628    o Added carbon sequestration sensitivity experiment
1629    
1630    checkpoint39
1631     o Modifications and fixes to support TAMC
1632       (mainly missing or wrong directives)
1633     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1634       in addummy_in_stepping
1635     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1636     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1637     o Included following packages:
1638       cal: calendar
1639       exf: external forcing
1640       ecco: essential routines to control use of cal, exf
1641             (NB: this is not the full ECCO environment)
1642     o disabled some packages by default in genmake
1643    
1644    checkpoint38
1645     o see notes_c37_adj.txt
1646     o corrected wrong layer index in external_forcing_t
1647     o replaced the_main_loop/forward_step by the_main_loop
1648     o removed forceoutput from write_state
1649       (replaced criteria for initial/final state)
1650     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1651    
1652    checkpoint37
1653     o mdsio.F routine split and packaged in pkg/mdsio
1654       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1655        used unless genmake -disable=mdsio)
1656     o allow a more precise surface-geopotential gradient for the atmosphere
1657       taking into account the change in space of Alpha (=1/rho) at the surface.
1658     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1659       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1660     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1661       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1662       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1663     o Time-Average diagnostics defined as a pseudo package "timeave".
1664     o pickup files : old pickup (before c35) did not work with new code (c35
1665       and after) unless activating 2 commented lines in initialise-varia.
1666     o Non-Hydrostatic pickup file Pb fixed.
1667     o bug with Rigid-lid version (since c35) fixed.  
1668    
1669    checkpoint36
1670     o implement Crank-Nickelson barotropic time-stepping
1671     o recover Time-Average diagnostics
1672     o fix Pb in checkpoint (PR#19)
1673     o AIM become a standard package ; clean unused CPP_kees
1674    
1675    checkpoint35
1676     o subtantial rewrite of dynamics.f
1677     o allows staggered time-stepping
1678     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1679     o added bottom drag (linear + quadratic)
1680    
1681    checkpoint34
1682     o Modified exchange routines for correct reverse simulation.
1683     o Added verification output to comply with bug fix in impldiff.F
1684       as of c33 (exp2, natl_box).
1685     o Corrected store directives in dynamics.F
1686     o Corrected array boundaries in impldiff.F
1687     o Corrected array dimensions in gmredi.
1688       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1689     o Added routine GLOBAL_SUM_INT to global_sum.F
1690     o Added mdsio_gl.F for ECCO purposes.
1691    
1692    checkpoint33
1693     o Fixed bug in lower BC in impldiff.F
1694     o Fixed confusion about units of forcing arrays in FFIELDS.h
1695       namely Fu,Fv,Qnet,Qsw,EmPmR:
1696       - Removed verification/natl_box/code/external_fields_scale.F
1697         (did not differ from that in model/src)
1698       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1699         (see FFIELDS.h for description)
1700       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1701         kpp_calc.F and kpp_transport_t.F
1702       - Removed model/src/external_fields_scale.F and calls to it
1703       - verification/natl_box uses flux data with "atmospheric" sign so
1704         a special version of external_fields_load.F is used to
1705         change the data as it's read in. This way, the arrays
1706         have the right units and signs at all times tha a user could
1707         possibly use them.
1708     o Corrected genmake to delete a temporary file during configuration
1709    
1710    checkpoint32
1711     o Scaling of forcing fields moved from external_forcing.F to
1712       external_fields_scale.F, called directly after loading fields.
1713     o Surface relaxation terms added to surface tendency fields in
1714       extra subroutine.
1715     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1716       fields.
1717     o Changes in GMRedi to comply with packaging structure.
1718     o Modifications and bug fixes in KPP package.
1719     o Verification experiment for KPP added (verification/nat_box/)
1720    
1721    checkpoint31
1722     o Packages interface brought in line with defined standard
1723       -> new routines packages_...F
1724       -> changes in initialise_fixed.F, initialise_varia.F
1725       -> enables initialisation interface for ECCO package
1726     o Rescaling of external forcing fields immediately after read
1727       (removed from external_forcing.F)
1728       -> new: surface_fields_scale.F
1729       -> affects ini_foorcing.F, external_fields_load.F
1730     o Computation of surface tendencies before tendency updates.
1731       -> new: external_forcing_surf.F
1732     o Change of variable names useGMRedi, useKPP, useECCO
1733     o Further changes in dynamics.F, impldiff.F for TAMC
1734     o Tested for experiments 0, 2, 4.
1735       - not yet tested for GMRedi.
1736       - not yet tested for KPP.
1737    
1738    checkpoint30
1739     o Updates for OBCs
1740     o New experiment for test OBCs (internal_wave)
1741     o New output.txt in verification/exp4/results/
1742     o Updates for KPP: calculation of viscosity corrected, new variables
1743       kpp_dumpFreq and kpp_taveFreq
1744     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1745       and entry for T90 in genmake
1746    
1747    checkpoint29
1748     o packaged KPP and GM/Redi
1749    
1750  checkpoint28  checkpoint28
1751   o Corrected initialization of hFacMin for difference vertical coordinates   o Corrected initialization of hFacMin for difference vertical coordinates
1752   o Modified calculation of partial cell thickness to more robust algorithm   o Modified calculation of partial cell thickness to more robust algorithm

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