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revision 1.16 by cnh, Tue Nov 3 15:31:08 1998 UTC revision 1.360 by heimbach, Mon Sep 27 18:01:22 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 pkg/cost
7      extend simple cost functions to treat time mean quantities
8      (T,U,V) via cost_accumulate_state from cost_tile
9    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
10        be 2 times larger than the minimum size the advection scheme requires.
11        now get a perfect conservation of salt in advect_cs test-exp (updated)
12    o GGL90 (Gaspar's TKE mixed layer)
13      - add horizontal diffusion of TKE, requires exchanges in
14        do_fields_blocking_exchanges, horizontal diffusivity is zero by
15        default. In OPA there is no horizontal diffusion of TKE but the
16        mixing coefficients are computed from a horizontal average of TKE of
17        6 points or so. I think that diffusion has a little more physical
18        justification.
19      - clean up ggl90_calc in the hope of reducing memory usage (this hope
20        was in vain)
21      - mask tke-variable in ggl90_init
22    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
23    o fix biharmonic diffusion on CS-grid.
24    o more obcs stuff
25      - added obcs_external_fields_load as an alternative to the EXF-pkg option
26        for reading boundary values. This routine is called from
27        obcs_prescribe_read
28      - updated obcs_check
29      - changed sponge layer relaxation parameter units for days to seconds
30      - turned off sponge layer by default
31      - changed argument list of OBCS_CALC to myTime+deltaTclock
32    
33    checkpoint55c_post
34    o obcs stuff
35      - new runtime flags useOBCSprescribe, useOBCSbalance
36      - re-arranged obcs_calc
37      - moved exf_getobcs to obcs_prescibe_read
38        obcs_prescibe_read is called after ORLANSKI stuff
39        and independent of it (executable can contain all).
40      - updated obcs_check
41      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
42        These may be necessary only if tangential velocities are
43        prescribed at OB, not sure, needs testing.
44    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
45      which simplifies the calls and passes the ifc check-bounds test
46    
47    checkpoint55b_post
48    o add a 2D scalar, Z location, exchange_2 routine.
49    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
50      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
51      affects advect_cs results (for the wrong reason): update output.txt
52    o use a more standard discretization for biharmonic viscosity ;
53     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
54      affects results of dome set-up: update output.txt
55    o fix gad_advection.F (CubedSphere part), back to version 1.23
56    o fix bug in mom_vi_del2uv.F (CubedSphere part).
57    
58    checkpoint55a_post
59    o merged code to
60      * prescribe/read time-dependent open boundaries
61        (works in conjunction with exf, cal)
62      * sponge layer code for open boundaries
63      * each boundary N/S/E/W now has its own CPP option
64        (healthy for the adjoint)
65    
66    checkpoint55
67    o up-to-date adjoint of previous breaks
68      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
69      - global_ocean_ebm: adjoint still needs fix (TLM ok)
70      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
71      - carbon: * remove tr1-related adjoint verification
72                * add ptracer as control variable
73    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
74      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
75    
76    checkpoint54f_post
77    o in verification/carbin/ remove experiment related to
78      ALLOW_PASSIVE_TRACER (array tr1 etc)
79      code_ad/ input_ad/ results_ad
80    
81    o add two new packages
82      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
83        + subject to optimization (memory)
84      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
85        + subject to reordering (many GOTOs in the original code)
86        + so far opps is called for every (i,j) point, and then operates in
87          the vertical; one may want to reorder the scheme in order operate in
88          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
89          fields)
90    o overhaul of IO so that we now have flags for MDSIO and/or MNC
91      - all verification tests compile and run with linux_ia32_g77
92      - defaults are compatible with current input files--nothing
93        should change if you were not previously using MNC
94      - MNC output has been added in numerous places (eg. timeave)
95        but there are still a few writes not yet do-able with MNC
96        (this is in progress)
97      - flags now allow for either/or/both use of MDSIO and MNC and
98        documentation will soon follow
99      - numerous small formatting cleanups for ProTeX
100    o add version info (via BUILD_INFO.h) to MNC and stdout
101    
102    checkpoint54e_post
103    o add two new packages
104      - pp81 (Packanowski and Philander, 1981), Richardson number and
105        stratification dependent mixing
106      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
107      - these scheme operate in a similar manner as KPP (without ghat, of
108        course), however there is only one diffusivity that is used for both
109        temperature and salinity (and passive tracers)ç
110    o add offline package
111    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
112      provided by Stephanie Dutkiewicz
113    o genmake2: add ability to search for C compilers and cleanup test output
114      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
115    
116    checkpoint54d_post
117    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
118    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
119      leading to additional shift by 5 days each year of integration
120       (i.e. leading to considerable offset over the years)
121    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
122    o start with no AB and no initial filtering (staggerTimeStep):
123      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
124    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
125      (external loading & cpl import/export stay in forward_step.F)
126    o update coupling interface to work with new staggerTimeStep
127    o change MDSIO ptracers_pickup.
128    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
129    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
130    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
131    
132    checkpoint54c_post
133    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
134      this affects (truncation error) output.txt of test-exp:
135       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
136    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
137    o change Qnet to always be the net heat flux, (+upward).
138      affects (truncation error) output of natl_box exp.: updated
139    o define the max number of passive tracers in PTRACERS_SIZE.h
140    o start to test mnc routinely in exp0
141    o add sea-ice loading (sIceLoad) as a new forcing field.
142    
143    checkpoint54b_post
144    o add testreport "-j JOBS" option for parallel builds (tested and pretty
145       impressive on Altix and Opteron systems)
146    o diagnostics can now write NetCDF files through the mnc package
147    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
148    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
149    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
150      affects (truncation error) output of lab_sea & natl_box exp.: updated
151    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
152    
153    checkpoint54a_post
154    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
155    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
156    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
157    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
158      + internal_wave (shift in writing cg2d_ini_res)
159    checkpoint54a_pre
160    
161    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
162      - modified verification/lab_sea and natl_box_adjoint accordingly
163    
164    checkpoint54
165    checkpoint53g_post
166    o prepare splitting of thermodynamics: store convect.counter in common block
167    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
168      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
169    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
170    o new parameter "nShapS": allow to treat differently S from T (nShapT)
171    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
172    o restore adjointability
173    
174    checkpoint53f_post
175    o modifications that affect AIM experiment results (update output.txt):
176      - no advection of S at top interface Nr (pkg/generic_advdiff)
177      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
178    o AIM pkg:
179      - include stability function into surf.Flux derivative relative to Tsurf
180      - calculate clear-sky radiation & surface temp. change (for diagnostics)
181    
182    checkpoint53e_post
183    o merged cylindrical coord configuration
184    o added rotating_tank experiment
185    checkpoint53e_pre
186    
187    checkpoint53d_post
188    o faulks upgraded: re-generate output.txt that have changed:
189       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
190    o Added Bryan and Lewis, 1979, vertical diffusivity profile
191    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
192    o added Sadourny discretization of Coriolis
193      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
194      - re-enabled use of omega3 (useAbsVorticity)
195    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
196      vector-invariant equations
197      - note: does *NOT* yet use same variable visc. for no-slip BC's.
198    o recoded the lateral boundary conditions for non-hydrostatic w, this time
199      hopefully without new bugs
200      - still to do: biharmonic friction for non-hydrostatic w
201    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
202    o regenerated output for global_ocean_ebm (using -ieee)
203    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
204      of mom_common/
205      - simple re-arrangement of instructions within computing loop
206    checkpoint53d_pre
207    
208    checkpoint53c_post
209    o new version of coupler for AIM+thSIce and Ocean models
210     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
211     - land: change Evaporation of snow
212     - aim with thSIce: fix bug in snow-precip.
213    o changes to calc_gw.F
214     - bug fix for w^2 term near the bottom boundary
215     - (hopefully) improve the lateral slip boundary condtions for use with
216        partial/looped cells
217      - because the bug fix changes two verification experiments anyway (exp5
218        and plume on slope), change the lateral boundary condition from half slip
219        to the value of no_slip_sides
220    o ebm package wasnt quite up to the parallel task. Fixed that.
221    o Adjoint of EBM package + verification
222      * TLM OK
223      * ADM not sufficient accuracy yet (needs further testing)
224    
225    checkpoint53b_post
226    o Commiting new energy balance model to repository
227      * package is pkg/ebm
228      * verif. is verification/global_ocean_ebm
229      * references are in ebm_driver.F
230    C      * X. Wang, P. Stone and J. Marotzke, 1999:
231    C        Global thermohaline circulation. Part I:
232    C        Sensitivity to atmospheric moisture transport.
233    C        J. Climate 12(1), 71-82
234    C      * X. Wang, P. Stone and J. Marotzke, 1999:
235    C        Global thermohaline circulation. Part II:
236    C        Sensitivity with interactive transport.
237    C        J. Climate 12(1), 83-91
238    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
239    C        Destabilization of the thermohaline circulation
240    C        by atmospheric eddy transports.
241    C        J. Climate 7(12), 1870-1882
242    o Will need long integration testing.
243    checkpoint53b_pre
244    
245    o created pkg/mom_common in preparation for variable viscosity code
246    o renamed and split ini_mnc_io
247    o pkg/land: only liquid water can diffuse or run-off
248    o AIM using land: soil wetness availability account for snow
249    o added printMapIncludesZeros to EEPARMS namelist
250    
251    checkpoint53a_post
252    o restore TAMC compatiility for exf_constants.h
253      (no usage of _d in .h)
254    o Additional storing in KPP in an attempt to fix
255      TAMC problem with adjoint of KPP code.
256      (no success...)
257      Identical code works fine with TAF.
258    o Fixed verification/natl_box_adjoint experiments.
259      Initial conditions for Experiments 4 and 5 are now
260      set to "SEAICE_initialHEFF=0", which is more reasonable,
261      and hence gives results closer to that of Experiment 2.
262      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
263    
264    checkpoint53
265    o stable checkpoint with up to date adjoint
266      TLM tests only run for 1st grdchk at the moment. Its unclear if
267      this is a code problem or a problem with resetting code for g_
268      variables that is being autogenerated wrong.
269      Otherwise:
270       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
271       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
272         are both still in chaos following their security messes.
273    
274    checkpoint52n_post
275    o various build (mostly genmake2) changes including:
276      - ability to build/run more easily within Cygwin and MacOS X
277      - more complicated Makefiles with a stronger dependence on Gnu Make
278    o pkg/seaice modifications
279      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
280        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
281        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
282      - changed proxy for geostrophic velocity and updated
283        verification/lab_sea/results/* accordingly
284      - removed ADI dynamic solver from pkg/seaice
285      - replaced all occurrences of 1/CSTICE or 1/CSUICE
286        they caused a segmentation fault under certain circumstances
287      - removed unused field WATR
288    o bug fix in exf-package:
289      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
290         now reflect that.
291    o small fixes in the cal-package:
292      - set reference date to first of January for the 'model'-calendar
293      - failing of cal_CheckDate in cal_FullDate now actually results in a
294        warning
295    o small modifications in exf-package to increase flexibility:
296      - change climtempfreeze from a constant to a runtime parameter that
297        is specified in data.exf_clim (default = -1.9)
298      - introduce runtime parameter windstressmax (default = 2.0) that is
299        specified in data.exf
300    o fix in pkg/thsice:
301      - update Evap (Tsf changes) to be consistent with Latent heat flux
302      - maintain snow precipitation unchanged (even if Tsf >=0).
303     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
304    
305    checkpoint52m_post
306    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
307      this does not change any of the results, because myIter=0 in swfrac always
308      lead to jwtype=2 (the default anyway), but the call makes little sense
309      as a default
310    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
311    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
312      atmospheric model (AIM) to use it ; add a "slab ocean" component.
313    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
314    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
315    o extending useSingleCpuIO option to work with new exch2 I/O format
316      - old-style, missing-tile I/O is still accessible by defining CPP
317        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
318    o monitor package can write to NetCDF files and/or STDOUT
319    o fix re-definition bug in MNC_GRID_INIT_ALL()
320    o doc/api_reference added
321      - a framework for building an API Reference Manual using all
322        the "protex" comments embedded in the code
323      - see pkg/generic_advdiff, pkg/mnc for examples
324    o MNC:
325      - make myThid the last argument for all subroutines
326      - new default for the grid files: NO halos
327      - add useMNC and other run-time flags
328      - separate per-file-group handling of the unlimited dimension
329      - early initialization of MNC w/ flags read at the eeboot stage
330        and lookup tables set in initialize_fixed
331      - write all MNC output to a freshly-created directory
332    o thermodynamics sea-ice (thsice) is now tested with testreport.
333    o test exp. advect_cs: use the standard cs32 grid ; update output.
334    o Added functionality to grdchk:
335      pick global i,j,k position (or nearest wet) where to perform check.
336    
337    checkpoint52l_post
338    o new land formulation:
339      a) use ground enthalpy as prognostic variable to ensure exact
340         energy conservation.
341      b) account for water temperature and for latent heat of freezing
342         in all processes (rain, run-off, ground storage)
343      c) compute surface and ground temperature implicitly.
344    o aim_v23 modification for new land model:
345      a) Treat separately land / ocean / sea-ice surface fluxes
346         to allow implicit computation of land & sea-ice surface temp.
347      b) add snow precipitation.
348    checkpoint52l_pre
349    
350    o fix problem (when 1 tile is empty) in min/max monitor.
351    o fix bug in timeAve (u,vZetatave in common block)
352    o no restoring terms under ice for pkg/seaice
353    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
354    o bug fix for pkg/seaice pickups
355    o change MNC call locations and add coordinate attributes
356    o mask vorticity at the corner ; affects global_ocean.cs output
357    o fix ini_curvilinear_grid ; test CS experiments with mpi
358    o aim.5l_cs: modify sea-ice fraction input file ; update output
359    o exf: Adding simple range check routine for exf fields after read
360    
361    checkpoint52k_post
362    o removed top-level directory "diags"
363      - we migrated these functions to pkg/timeave a long time ago
364    o fixed bug introduced in pkg/monitor
365    o accuracy ctrlprec = 32 insuffient for gradient checks using
366      averaged fields (I/O via cost_averages)
367      -> use ctrl.h in active_file*.F to control I/O precision.
368    o paramter list of CALL ADTHE_MAIN_LOOP
369    o added initial do_the_model_io to ecco
370    o set all ...Freq to zero after cost_final
371      taveFreq, dumpFreq, pChkptFreq
372    o MAIN and ECCO differentiability restored
373    
374    checkpoint52j_post
375    o fix nchklev in tamc.h for global_ocean...
376    o Bringing flow and store directives up-to-date
377    o Really weird thing!
378      call do_the_model_io from the_main_loop with parameters
379      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
380      TAF places a faulty re-call of initialise_varia
381      after cost_final call which should not be there!
382    checkpoint52j_pre
383    
384    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
385      error messages
386    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
387    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
388      debug output
389    o modfied mdsio_writefield.F to handle non-global files under exch2
390    o update AIM Cubed-Sphere exp (aim.5l_cs):
391      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
392    o update AIM Equatorial Channel exp:
393      use standard aim_v23 pkg and change the SST fields to be more realistic.
394    o globalFile now works with exch2
395    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
396      mon_vort3.F to make exch2 friendly with >1 tile per cube face
397    o limit timeave output for hi-res integrations
398    
399    checkpoint52i_post
400    o removed CPP_EEOPTIONS.h from verification/*/code
401    o updated the tiling for global_ocean_pressure
402    checkpoint52i_pre
403    
404    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
405      the old pkg/aim).
406    
407    checkpoint52h_pre
408    o shortened offending lines in exch2_send_rx?.template
409    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
410    o genmake2: add build & execute test for NetCDF code
411    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
412      old grid files, moved CPP_EEMACROS.h to pkg/exch2
413    o added useSingleCPUIO flag to monitor.F and mon_out.F
414    o added temporary hack for sea-ice dynamics on the cube:
415      metric terms are ignored and it is assumed that
416      there is no sea-ice on cube faces 1, 2, 4, and 5.
417    
418    checkpoint52f_post
419    o added exch2 cube routines to pkg/exch2
420    o modified hs94.cs-32x32x5 to use it
421    o added new grid files to hs94.cs-32x32x5
422    checkpoint52f_pre
423    
424    checkpoint52e_post
425    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
426      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
427    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
428      to work with implicit vertical advection and AB ;
429    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
430    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
431     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
432    checkpoint52e_pre
433    
434    o fix bug in impldiff when Nr=1 or Nr=2.
435    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
436    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
437    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
438      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
439    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
440    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
441    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
442    
443    checkpoint52d_post
444    o re-tiled many expts to allow comparison in multi-processor mode
445      - updated output accordingly
446      - changed hs94.128x64x5 to use intial T from file rather than use the
447        random number generator
448    o add infrastructure in model routines for fizhi and gridalt packages
449    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
450    o changes to permit hi-res, cubed-sphere, configuration
451      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
452      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
453      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
454        of surface winds for the cube
455      (A verification experiment, based on global_ocean.cs32x15, but with
456       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
457       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
458       complete with example surface forcing files and matlab scripts to look
459       at the output and compare it with that of global_ocean.cs32x15.)
460    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
461       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
462       to conform to the common rule.
463    o check-in the first version of the coupler + interfaces for multi-components
464       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
465       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
466       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
467       - ocean and atmos. share the same horizontal grid (no interpolation).
468       - exchanges between component and coupler is done in forward_step
469    o new verification experiment, cpl_aim+ocn:
470       coupled ocean - AIM atmosphere on cs32 grid.
471    
472    checkpoint52d_pre
473    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
474    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
475    
476    checkpoint52c_post
477    o Fixing OPTIONS files for use of exf:
478      - ALLOW_ECCO not needed
479      - ECCO_CPPOPTIONS.h should not be included from
480        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
481        as has been the case in the past
482      - All cal/exf related options are currently set in
483        single header file. Should remain so until we
484        agree on a consistent new policy.
485    o Removed all CPP options for cal package.
486      cal has no more CPP options.
487    o modified STOREs in GAD_ADVECTION
488    o corrected key comp. for passkey
489    
490    checkpoint52b_post
491    o new version: "thsice" of thermodynamic sea-ice pkg:
492     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
493     - modify fluxes but do not change theta directly;
494     - light cleaning of bulk_force pkg (still needed with thsice).
495     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
496       + output_thsice.txt to test thsice & bulk_force pkgs.
497    o put back grid & coriolis monitor output.
498    checkpoint52b_pre
499    
500    o call "do_the_model_io" at the beginning (=> dump initial state)
501    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
502    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
503      (need info on NUMBER_OF_PTRACERS)
504    o missing PTRACERS headers in some routines
505    o default tamc.h in pkg/autodiff supposed to crash
506      to ensure proper customization
507    
508    checkpoint52a_post
509    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
510      - moved surfaceTendencyTice from pkg/seaice to main code
511      - subroutine FREEZE_SURFACE now limits only surface temperature
512        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
513        => new output.txt for global_ocean.cs32x15 & global_with_exf
514      - keep the old version of FREEZE for backward compatibility;
515        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
516      - corresponding modifs for TAF directives
517    o added surface flux output variables to TIMEAVE_STATVARS
518    o time-averaged output for pkg/ptracers
519    o fix problem with ECCO-related divided adjoint
520      snapshot file was missing some ad-variables,
521      but no warning issued by TAF
522    
523    checkpoint52a_pre
524    o some bug fixes for #undef REAL4_IS_SLOW
525    
526    checkpoint52 = ecco_c52_e35
527    o after testing adjoints of checkpoint51u_post
528    
529    checkpoint51u_post
530    o this is the post-merge tag of the ecco-branch
531      (needs another clean checkout and re-testing)
532    o various natl_box_adjoint configs and results
533      but no input fields
534    o obcs adjoint not yet merged!
535    o adding ECCO global 1x1 and 2x2 degree configs
536    o updated/extended some store directives for seaice
537    o pkg/ecco now containes ecco-specific part of cost function
538    o top level routines the_main_loop, forward_step
539      supersede those in model/src/
540      previous input data.cost now in data.ecco
541      (new namelist ecco_cost_nml)
542    o in ctrl/ cleaned some cross-dependencies and updated CPP options
543    
544    checkpoint51t_post
545    o this is the pre-merge tag of the ecco-branch
546    
547    checkpoint51s_post
548    o cleanup: removed various obsolete #define-s
549    o pkg/grdchk
550      - renamed 'ph-grd 3' to 'grad-res'
551      - merged from ecco-branch
552        (remaining bug fixes for obcs gradient checks)
553      - additional high-precision output for testreport
554        (grep for 'precision_grdchk_result')
555    
556    checkpoint51r_post
557    o cleaned up or removed CPP_OPTIONS.h files
558    o updated results for some of the tests to reflect the new
559      optfiles (-ieee: -O0 instead of -O3)
560    
561    checkpoint51q_post
562    o cd_code:
563      - moved cd_scheme.F -> cd_code_scheme.F
564      - separate read_checkpoint from cd_code_ini_vars.F
565      - separated cd_code part from write_checkpoint
566      - updated AD_SOURCE, generated .flow
567      - added CD_CODE_VARS.h to the_main_loop
568      - Moving cd_code specific store dir.s to pkg/cd_code
569    o ctrl package totally restructured
570      - pack/unpack now optional and decoupled from
571        xx_/adxx_ I/O
572      - ctrl_pack/unpack cleaned
573        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
574      - confined inclusion of AD_CONFIG.h to where necessary.
575    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
576    
577    checkpoint51p_post
578    o create initial cd_code package
579      - WARNING: the initialization of fields within packages
580        is broken because INI_FIELDS (where READ_CHECKPOINT is
581        called) is called *before* PACKAGES_INIT_VARIABLES.
582        This seems to be backwards since
583        1) its important to initially zero the entire field including
584           the "halo" region
585        2) zeroing needs to be done *before* reading pickup info
586           and the pickup call might or might not happen in any
587           particular run
588      - this needs an overhaul for R2
589    o cleanup verification/*/code/GMREDI_OPTIONS.h
590    o cleanup testreport
591    
592    checkpoint51o_post
593    o bringing AD-related verif's up to date with genmake2
594      - carbon/
595      - global_ocean.90x40x15/
596      - hs.94.1x64x5/
597      - (front_relax/ )
598    o (more) consistent directory structure for AD-related verif.'s
599    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
600    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
601    o bug fix in find_alpha.F for MDJWF:
602      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
603        change rho -> rho-rhoConst
604      - replace call find_rho to find_rhonum
605    o initialisation of rFlx extended to full array (required by TAF)
606      and shifted to thermodynamics
607    o removed PTRACERS.h in ptracers routine
608    o added surfacetendencyPtr to S/R parameter list pracers_forcing
609    o Correcting initialisations for fVerU, fVerV.
610    o helping TAF to recognize dependency on kUp for
611      fVerU, fVerV
612    o Replacing delZ by delR in pkg/ctrl/
613    checkpoint51o_pre
614    
615    o undid all of cp51 pending some cleanups and discussion
616    o added the [#include "AD_CONFIG.h"] statement to all files that need
617       it for adjoint/tl #defines
618     o re-worked the build logic in genmake2 to support AD_CONFIG.h
619     o removed tools/genmake since it no longer works
620    
621    checkpoint51n_post
622    o modifications to make FREEZE flux visible to pkg/kpp
623      - moved surfaceTendencyTice from pkg/seaice to main code
624      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
625      - subroutine FREEZE now limits only surface temperature
626        (this means new output.txt for global_ocean.90x40x15,
627         global_ocean.cs32x15, and global_with_exf)
628    o added surface flux output variables to TIMEAVE_STATVARS
629    
630    checkpoint51n_pre
631    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
632    o added [#include "AD_CONFIG.h"] to all files that use the following
633      defines:
634      - ALLOW_ADJOINT_RUN
635      - ALLOW_TANGENTLINEAR_RUN
636      - ALLOW_ECCO_OPTIMIZATION
637    
638    checkpoint51m_post
639    o incorporating changes to get TAMC/TAF working in genmake2
640      - added new TAMC/TAF targets to the Makefile
641      - various cleanups related to package handling
642      - these changes should have no impact on the forward model
643    
644    checkpoint51l_post
645    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
646     - faster algorithm for cal_addtime.F
647     - higher precision arithmetic, where needed
648     - pkg/exf *startdate variables changed from calendar date to
649       model integration time
650    
651    checkpoint51l_pre
652    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
653    o enable to apply restoring on S & T only in a latitude band.
654    o update output (external_forcing_surf modif. change truncation errors)
655       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
656    
657    checkpoint51k_post
658    o change default to: useNHMTerms=.FALSE.
659     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
660       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
661     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
662        exp1, ideal_2D_oce
663     - change data file of oceanic exp (leave the results unchanged for now)
664       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
665    o set gravitySign automatically according to the vertical coordinate used
666      (and change sign: back to "logical" value: +1 when R increases downward)
667    o added an include barrier to the default CPP_OPTIONS.h and
668      removed the #include "PACKAGES_CONFIG.h" from it
669    o fix a bug in mom_fluxform (from chk51j_post)
670    
671    checkpoint51j_post
672    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
673    o adjusted some flow directives (dynamics, thermodynamics)
674    o added cubed-sphere case to test cost function
675    o heckpoint_lev?_directives.h now include
676      pkg-specific directives, whenever those are enabled.
677    o Moving pkg-specific flow directives to corresponding pkg
678      Moving pkg-specific differentiation list to corresponding pkg
679      Moving pkg-specific checkpoint-lev storing to corresponding pkg
680      ---> conventions are
681           - pkg_ad.flow
682           - pkg_ad_diff.list
683           - pkg_ad_check_lev?_dir.h
684    
685    checkpoint51i_post
686    o merge of the branch-genmake2
687      - knowingly breaks the older genmake
688      - automatic generation of all ALLOW_${PKG_NAME} defines
689      - new testreport supersedes older testscript
690    o large number of package inclusion and header cleanups
691    checkpoint51i_pre
692    
693    o new output for adjoin of global ocean vector invariant
694    o fix for checkpoint of thermodynamic seaice and bulk_force
695    o Steph gchem various cleanups
696    
697    checkpoint 51h_pre
698    o fixed some single quotes
699    o modify gchem pkg to be more versatile
700    o modifications to clean up dic pkg
701    o add pkg/cfc
702    
703    checkpoint51g_post
704    o provide links for ARPACK and ADM*TLM
705    o start removing verification/vero/
706    o update AD-related stuff
707      (in particular some IF-statements in model/src/ routines)
708    o adding to verification/global_ocean.90x40x15/ adjoint of
709      vector invariant setup
710    
711    checkpoint51f_post
712    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
713    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
714      of tracer Green's fucntions for ocean inversion project.
715    
716    checkpoint51f_pre
717    o Added on-the-fly spatial interpolation capability
718        "USE_EXF_INTERPOLATION" to pkg/exf.
719      - This is a temporary Cartesian-grid hack until
720        the super-duper ESMF coupler becomes available.
721      - See verification/global_with_exf/README for usage example.
722      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
723        flags and modified pkg/seaice accordingly.
724    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
725        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
726        non-local transport term.
727    
728    checkpoint51e_post
729    o pkg/mom_vecinv:
730      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
731      - add time-ave diagnostic of vorticity advection.
732    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
733    o atmospheric geopotential: - include water vapor effect;
734                                - use p^kappa in p* scaling.
735    o land pkg: read initial state from files.
736    o AIM : add stratospheric drag in the upper level
737    
738    checkpoint51d_post
739    o change function ILNBLNK (=> last non-blank char.) to return zero
740      (instead of the string length) when the string. char is empty
741    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
742    o modif's to restore TAMC compatibility
743      - avoid "_d" constructs in PARAMETER declarations
744      - avoid interrupting lines by comment lines
745    o Use cluster local disks for purely local I/O
746      vs. globally visible disks needed for ctrl stuff
747      (merged from ecco-branch)
748      - new active_file_loc... and mdsio_..._loc routines
749      - affected packages: autodiff, ctrl, grdchk, mdsio
750    
751    checkpoint51c_post
752    o introducing integer flag debugLevel
753      - debLevZero: suppress all output
754      - debLevA: standard
755      - debLevB: equivalent to current debugMode=.TRUE.
756    o introducing pathname variable mdsioLocalDir for mdsio
757      that can be specified at runtime
758      (relevant for cluster I/O to local disk)
759    `
760    >>>checkpoint51b_post
761    adjoint of ptracers
762    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
763    o extended state in checkpoint_lev?, etc.
764    o alternative ctrl/cost with tr1 or ptracer
765    o new comlev1_bibj_ptracers
766    o new ptracers.flow
767    o made ptracers_forcing same as external_forcing_s
768    o added verification for adjoint with ptracers
769      - adm. grdchk fail so far
770      - tlm. grdchk OK
771      - checked tapelev/comlev recomputations: OK
772    <<<checkpoint51b_pre
773    
774    checkpoint51a_post
775    o added code for biogeochemistry package
776      - new pkgs: dic, gchem
777      - new subroutine in ptracers
778    o modify code for biogeo packages
779      - in model/src and pkg/ptracers
780    
781    checkpoint51
782    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
783      - autodiff, ctrl, exf, grdchk, seaice
784      kept separate packages
785      - cost, ecco, obcs
786    o updating verification/internal_wave, verification/lab_sea
787      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
788    
789    checkpoint50i_post
790    o Preparing next differentiable checkpoint and sync
791      of MAIN vs. ecco-branch
792      - 1st step: this one is differentiable
793      - 2nd step: next(! not this) checkpoint will have updated packages
794                  from ecco-branch)
795    
796    checkpoint50h_post
797    o new package "land": provide surface BC for AIM.
798    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
799    o AIM: use true log-P extrapolation for near surface temp (= as in
800        F.Molteni paper) ; update aim.5l_cs output.
801    o New variable in PARM03 for more flexible pickups
802    o somewhat cleaned package initialisation sequence for
803      ctrl/ cost/ ecco/ in packages_... routines
804    
805    checkpoint50g_post
806    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
807      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
808      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
809        made the default because of faster convergence than ADI
810    
811    checkpoint50f_post
812    o exf totally restructured
813      - replaced all exf_set_ routines by one generic exf_set_gen.F
814        and made sure it's still differentiable
815      - split exf_getffields.F into new exf_bulkformulae.F
816      - exf_inscal_/exf_outscal_ suffixes consistent with field names
817      - updated adjoint/makefile and relevant verif. accordingly
818    
819    checkpoint50f_pre
820     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
821          + change Evap over land. (update aim.5l_cs output)
822     o added missing .cvsignores and made uniform across expts
823     o changed configuration of tidal_basin_2d expt
824     o added pkg/debug functions for tracing code in fatal crashes
825     o tidied pkg/monitor to use MONITOR_OPTIONS.h
826     o new fn in pkg/monitor to stop model if solution grows too big
827     o removed lots of single quotes from comments
828    
829    checkpoint50e_post
830    o make KPP work with PTRACERS
831     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
832       nearly a copy of kpp_transport_s
833     - there is no analogue to SurfaceTendencyS, so I have to use
834       gPtr(of the surface layer) instead
835    o add a new platform SunFire+mpi (SunFire 15000) to genmake
836    checkpoint50e_pre
837    
838    checkpoint50d_post
839    o change kpp output from multiple-record state files to single-record state
840      files analogous to write_state.F
841    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
842      analogous to the cg2d-related output.
843    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
844      so that writing to internal file fn (with length 512) fails.
845    checkpoint50d_pre
846    
847    checkpoint50c_post
848    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
849    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
850    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
851    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
852    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
853    
854    checkpoint50c_pre
855    Merging from release1_p13:
856    o bug fix for pkg/seaice dynamic solver
857    o Added SEAICE_initialHEFF to pkg/seaice
858    
859    checkpoint50b_post
860    o store u*,v* in gU,V instead of in guNm1,gvNm1
861    o in order to put the momForcing out of the Adams-Bashforth:
862      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
863      to timestep.F
864    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
865    o re-generate output for highly sensitive test-exp:
866       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
867    
868    checkpoint50b_pre
869    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
870    o corrected CPP option mismatch in exf_Bulk... functions for case
871      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
872    
873    checkpoint50a_post
874    o Bug fix for merging between c50 and KPP.
875      ikey was passed from thermodynamics to kpp_calc via
876      common block rather than being recomputed in kpp_calc,
877      in contradiction with new key itdkey.
878      New key ikppkey created, and tamc.h headers updated.
879    
880    checkpoint50
881    - 2nd step of merge with ecco-branch:
882      merge changes in ecco-branch back into main trunk
883    - bug fix in find_alpha
884    - more storing in gmredi_calc_tensor.F, kpp_routines.F
885    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
886    - merged some sliced AD support routines
887    
888    checkpoint49
889    merged from ecco-branch:
890    o exf:
891      - Enable initialisation of forcing fields to constant
892        (runtime) values.
893      - in exf_getffields.F
894        Reduce i-/j-loop to interior domain, discarding overlaps.
895        That also fixes wrong TAF-key computations for key_1, key_2
896        with bulf formulae.
897      - exf_init.F modify #ifdef for exf_init_evap
898      - exf_getffieldrec.F, ctrl_getrec.F
899        The following INT-usages are not safe:
900          fldsecs  = int(fldsecs/fldperiod)*fldperiod
901          fldcount = int(fldsecs/fldperiod) + 1
902        and were modified.
903    o autodiff: checkpoint_lev...
904      - updated storing for bulk formulae (some arrays were missing)
905      - added state for seaice package
906      - synchronized with main branch
907    o DIVA:
908      Modif.s in
909      - the_main_loop.F
910      - the_model_main.F
911      and added cost_final_restore.F cost_final_store.F
912      o With these changes, it is possible to fully separate
913        the first forward run to compute the cost function (mdthe_main_loop)
914        and adjoint runs over individual DIVA intervals (adthe_main_loop)
915        into separate model executions.
916        This enables better tuning of DIVA to given queue sizes.
917      o Loss of cost function value in consecutive DIVA runs is
918        fixed by storing to 'costfinal' file.
919      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
920        beginning/end of adjoint integration is accounted for.
921      The current changes apply to TAF-1.4.26.
922      TAF has one remaining bug, requiring one manual change
923      (see MITgcm manual).
924    o cal: synchronized between MAIN and ecco-branch
925    
926    checkpoint48i_post
927    o Changes to restore differentiability of code w.r.t. previous tag
928      (mostly adding new routines to make list and replacing
929      pressure by totPhiHyd).
930    o Updated and merged grdchk package
931      - has both ADM and TLM checks
932      - works for single- and multi-proc.
933      - output cleaned
934      - worked successfully for parallel DIVA
935    o genmake:
936      - Adding -platform=SP4
937      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
938    o Modif. for DIVA:
939      ctrl_unpack should not be called in intermediate DIVA interval.
940      (similar thing would apply for active files such as
941      tbar, sbar, psbar, which should not be reinitialised;
942      only relevant for ecco-branch)
943    
944    checkpoint48h_post
945    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
946    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
947    o Added SEAICE_initialHEFF to pkg/seaice
948    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
949    
950    checkpoint48g_post
951    --- EOS:
952    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
953      store total Potential in totPhyHyd for diagnostics & EOS.
954    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
955    --- Pressure/geopotential gradient:
956    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
957    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
958      ( changes results of global_ocean_pressure )
959    o NLFS + z-coord.: add eta*Rho' contribution.
960    o accurate phiHyd when using interface-W at the middle between 2 centers
961     ( changes results of ideal_2D_oce )
962    o includes r* 2nd term in potential gradient.
963    
964    checkpoint48f_post
965    Merging from release1_p12:
966    o Modifications for using pkg/exf with pkg/seaice
967      - improved description of the various forcing configurations
968      - added basic radiation bulk formulae to pkg/exf
969      - units/sign fix for evap computation in exf_getffields.F
970      - updated verification/global_with_exf/results/output.txt
971    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
972      (SBO) core products, including oceanic mass, center-of-mass,
973      angular, and bottom pressure (see pkg/sbo/README.sbo).
974    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
975      to avoid negative values in shallow regions.
976      - updated verification/natl_box/results/output.txt
977      - updated verification/lab_sea/results/output.txt
978    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
979    o Added useSingleCpuIO option (see PARAMS.h).
980    o Updated useSingleCpuIO option in mdsio_writefield.F to
981      work with multi-field files, e.g., for single-file pickup.
982    o pkg/seaice:
983      - bug fix in growth.F: QNET for no shortwave case
984      - added HeffFile for specifying initial sea-ice thickness
985      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
986    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
987      kpp_transport_t.F, forward_step.F, and the_main_loop.F
988    o pkg/seaice:
989      - adjoint-friendly modifications
990      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
991    
992    checkpoint48e_post
993    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
994    o dynamics: change definition of computational domain & adapt mom_fluxform
995      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
996    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
997        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
998        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
999        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1000        inverted_barometer solid-body.cs-32x32x1
1001      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1002    
1003    checkpoint48d_post
1004    o in preparation for r*:
1005     a) use pre-computed gradient of hydrostatic potential:
1006        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1007     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1008        => affects results of glob_oce_pressure (different truncation error)  
1009      update output.txt of ideal_2D_oce & global_ocean_pressure
1010    
1011    checkpoint48d_pre
1012    o in preparation for r*:
1013      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1014      pass the 2 comp. of the grad. as arguments to momentum S/R.
1015      but for the moment, only used if it does not change the results.
1016    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1017    
1018    checkpoint48c_post
1019    Modifications in treatment of initial flux forcing controls
1020    to avoid extra storing of flux fields.
1021    
1022    checkpoint48c_pre
1023    o Added tidal_basin_2d experiment (currently 1D!)
1024    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1025    
1026    checkpoint48b_post
1027    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1028     (modification to pressure gradient not yet implemented)
1029    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1030      (for U & V) that are used for vertical advection of momentum.
1031    
1032    checkpoint48a_post
1033    o In preparation for r*, use temp. array to compute vertical transport
1034       in flux-form momentum pkg. => change results of few test-exp.
1035      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1036                        lab_sea, natl_box & plume_on_slope
1037    
1038    checkpoint48
1039    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1040    
1041    checkpoint47j_post
1042    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1043    o moved adexch from forward_step to addummy_in_stepping
1044    o added exch in ctrl_map_...
1045    o aveFreq.=0. at end of cost_final to avoid overwrite in
1046      reverse checkpointing loop
1047    o Yet more changes in gmredi:
1048      * adgmredi_calc_tensor
1049        avoiding all recomputation of gmredi_slope_limit
1050      * adgmredi_x/y/rtransport
1051        added flag for excessive storing to avoid recomp. of
1052        u/v/rtans, dTdx/y/z
1053        -> this is not really necessary and very memory-consuming
1054      * adgmredi_slope_psi:
1055        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1056      * gmredi_slope_limit
1057        re-activated full calculation of taperfct for case 'ac02'
1058    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1059    
1060    checkpoint47i_post
1061    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1062    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1063      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1064    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1065    o gmredi: fix few bugs.
1066    
1067    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1068    This will be a good checkpoint to plug into the ecco-branch.
1069    o few modif.'s to get latest version adjointed
1070      (mainly kick out code in ini_linear_phisurf)
1071    o modif's to run adjoint with exactConserv
1072    o case GM_BOLUS_ADVEC should be cleaned
1073      S/R gmredi_slope_psi should be cleaned
1074    o verification/carbon now has exactConserv=.TRUE.
1075    
1076    checkpoint47g_post
1077    o time-average AIM output: becomes independent from statvars time-average
1078      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1079    o After TAF bug fix:
1080      Tested adjoint of gmredi package.
1081      Tests were done with checkpoint47 rather than with latest
1082      checkpoint47f_post since the latter is broken for the adjoint
1083      verification/carbon/ contains both ADM and TLM gradient checks.
1084    Here they are, before they get changed/lost/stolen.
1085    Mostly modif.'s to fix numerical sensitivities.
1086    Gradient checks OK for
1087    - GM_taper_scheme:
1088      * clipping
1089      * ac02
1090      * linear
1091      * glw91
1092      * dm95
1093      * ldd97
1094    - GMREDI_OPTIONS:
1095      * GM_VISBECK_VARIABLE_K
1096      * GM_NON_UNITY_DIAGONAL
1097      * GM_EXTRA_DIAGONAL
1098      * GM_BOLUS_ADVEC
1099    in conjunction with data.gmredi parameters to be checked in
1100    in a few minutes under verification/carbon/code/
1101    
1102    checkpoint47f_post
1103    Merging from release1_p10:
1104    o modifications for using pkg/exf with pkg/seaice
1105      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1106        and SEAICE_EXTERNAL_FLUXES
1107      - pkg/exf CPP options EXF_READ_EVAP and
1108        EXF_NO_BULK_COMPUTATIONS
1109      - usage examples are Experiments 8 and 9 in
1110        verification/lab_sea/README
1111      - verification/lab_sea default experiment now uses
1112        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1113    
1114    checkpoint47e_post
1115    o created a tag prior to creating a branch
1116    
1117    checkpoint47d_post
1118    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1119      at the bottom boundary had an erroneous half slip boundary condition
1120    o added bottom drag and no slip boundary condition capabilities to
1121      oceanic pressure coordinates code
1122    o added new verification experiment global_ocean_pressure, this experiment is
1123      also described in the tutorial section of the manual
1124    checkpoint47d_pre
1125    
1126    checkpoint47c_post
1127    o Added a verification experiment for a global cubed-sphere ocean run
1128      -  verification/global_ocean.cubed32x32x30
1129      -  uses pkg/therm_seaice and pkg/bulk_forcing
1130    
1131    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1132    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1133      when using P-coordinate; only implemented for atmospheric config.
1134    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1135      NOTES: requires option NONLIN_FRSURF to be "#define".
1136    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1137    
1138    checkpoint47b_post
1139    Merging from release1_p9:
1140    o pkg/seaice
1141      - removed GOTO's and added taf directives
1142      - double precision constants to reduce the g77 (Linux)
1143        to F77 (SGI) differences reported in release1_p8
1144    o tools/genmake
1145      - added SGI options
1146    o verification/testscript
1147      - updated to that of checkpoint47a_post
1148    o verification/global_ocean.90x40x15/input/eedata
1149      - modified for SGI f77 compatibility
1150    o verification/lab_sea
1151      - added description of sea-ice model
1152      - added missing matlab routines
1153      - added test of thermodynamics parallelization
1154    
1155    checkpoint47a_post
1156    o new pkg: aim_v23
1157     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1158       for now, keep the same surface forcing as before.
1159     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1160     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1161     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1162    o add diagnostic of surface correction term in monitor output
1163    
1164    o bulk_force and therm_seaice
1165    - Two packages:  bulk_force (Bulk forcing)
1166      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1167    - Earlier integration from Stephaine Dutkiewicz
1168      and Patrick Heimbach.
1169    - Two ifdef statements for compile time,
1170       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1171    
1172    checkpoint47
1173    differentiable version of checkpoint46n_post
1174    o bug fix in quasihydrostaticterms
1175    o * "clean" adjoint code (in terms of extensive recomputations)
1176        can now be obtained for all GMREDI options (i.e. for
1177        - GM_VISBECK_VARIABLE_K
1178        - GM_NON_UNITY_DIAGONAL
1179        - GM_EXTRA_DIAGONAL
1180        - GM_BOLUS_ADVEC )
1181      * However, wrong gradient check problem remains unsolved.
1182      * New CPP options have been introduced for different
1183        tapering schemes
1184    o external_fields_load now part of differentiation list
1185    o pressure needs multiple storing;
1186      would be nice to have store_pressure at beginning or
1187      end of forward_step, e.g. by having phiHyd global (5-dim.)
1188      (NB: pressure is needed for certain cases in find_rho,
1189      which is also invoked through convective_adjustment).
1190    o recomputations in find_rho for cases
1191     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1192    o #define ATMOSPHERIC_LOADING should be differentiable
1193    o ini_forcing shifted to begining of initialise_varia
1194    o Incorporating QNVS line search routines into MITgcm
1195      (this is separate code, and therefore not under pkg)
1196      lsopt/, optim/
1197    o Updated verification/carbon/
1198      - #define GM_VISBECK_VARIABLE_K
1199      - GM_taper_scheme    = 'ldd97'    
1200    
1201    checkpoint46n_post
1202    Merging from release1_p8:
1203    o verification/natl_box:
1204      updating new external_fields_load routine
1205    o New package: pkg/seaice
1206      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1207      The sea-ice code is based on Hibler (1979-1980).
1208      Two sea-ice dynamic solvers, ADI and LSR, are included.
1209      In addition to computing prognostic sea-ice variables and diagnosing
1210      the forcing/external data fields that drive the ocean model,
1211      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1212      The implied surface heat flux is then stored in variable
1213      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1214      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1215      non-local transport term.  Because this call precedes model
1216      thermodynamics, temperature under sea-ice may not be "exactly" at
1217      the freezing point by the time theta is dumped or time-averaged.
1218      N.B.: fairly large differences in accuracy occur across
1219            different platforms/compilers; comparison between
1220            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1221            generated output gives:
1222       T           S           U           V
1223      C D M    c        m  s        m  s        m  s        m  s
1224      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1225      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1226      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1227    
1228      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1229    o GAD:
1230      - generated new common blocks to account for call of
1231        same gad routines with differing traceridentities
1232        (needed to modify tracerIdentity indices in GAD.h)
1233      - generated separate common blocks for case useCubedSphereExchange
1234        (Department of Futurology)
1235      - parameter lists to gmredi_?transport: added tracerIdentity
1236      - added new key indices to tamc.h
1237    o external_fields_load:
1238      - added this routine to TAF list
1239      - needed to make some common blocks global and additional storing
1240        along the same lines as exf package (checkpoint_lev?_directives.h)
1241    o exf:
1242      updated external forcing package
1243      - bug fixes carried over from ecco-branch
1244        (missing OBCS_OPTIONS.h in two routines)
1245      - enable easy to use "no forcing".
1246      - added exf I/O for atmospheric loading
1247      - added exf I/O for runoff data
1248      - transfered scaling between exf <-> MITgcm to exf namelist
1249    o Adding new verification experiment global_with_exf.
1250      This verification experiment is almost identical to the
1251      global_ocean.90x40x15 experiment, except that it uses
1252      the exf (and cal) package instead of the
1253      external_fields_load routine (cf README file).
1254    
1255    checkpoint46m_post
1256    o modified testscript to return -- when there are no lines of "%MON" output
1257    o added new flag "quasiHydrostatic" for QH mode
1258      and new routine quasihydrostaticterms()
1259    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1260      New routine: mom_u_coriolis_nh()
1261    o fixed sign of non-hydrostatic metric terms in u and v equations.
1262      Depend on correct sign of gravitySign.
1263    o added work.pc* to .cvsignore in aim directories using ifc
1264    o introduced flag for controllin non-hydrostatic metric terms
1265    o removed gravitySign from PARM04
1266    o switched to g77/ifc from pgf77 in aim experiments
1267    
1268    checkpoint46l_post
1269    o made convective adjustment work with pressure coordinates:
1270     - changed the direction of k-loop in convective_adjustment.F for the
1271       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1272     - adjusted the reference pressure k-index in convective_adjustment.F
1273     - adjusted the convection condition in convect.F (in analogy to
1274       calc_ivdc.F)
1275     - convective_adjustment no longer computes anything on the halos
1276     - removed the warnings about negative salinity from find_rho.F and
1277       find_alpha.F; instead the new routine look_for_neg_salinity, called
1278       at the beginning of find_rho, find_alpha, and find_beta, does a
1279       check of the entire slice, if CPP-option
1280       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1281    checkpoint46l_pre
1282    
1283    checkpoint46k_post
1284    o fixed the verification/global_ocean.90x40x15 experiment:
1285     - new bathymetry (the world according to A., JMC, and M.)
1286     - new initial fields and forcing fields (*.bin files)
1287     - new POLY3.COEFFS (for the next release one should switch to a full
1288       equation of state: JMD95P or MDJWF)
1289     - fixed several errors and redundancies in the data file
1290     - experiment uses looped cells
1291     - added matlab directory with diagnostic scripts for plotting of output
1292    
1293    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1294     - read AIM physics parameters from a file (data.aimphys)
1295     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1296    
1297    checkpoint46j_post
1298    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1299    o move wVel computation at the end of the time step, in S/R integr_continuity
1300    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1301    o update timeave pkg for wVel diagnostic.
1302    checkpoint46j_pre
1303    
1304    checkpoint46i_post
1305    o Clean up AIM package (and keep the results unchanged):
1306      include CPP_OPTION and use IMPLICT NONE in all routines ;
1307      declare all the variables _RL ; use _d 0 for all numerical constants.
1308      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1309    
1310    checkpoint46h_post
1311    o cleaned up the use of rhoNil and rhoConst.
1312      - rhoNil should only appear in the LINEAR equation of state, everywhere
1313        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1314        and the dynamical equations are all divided by rhoConst
1315    o introduced new parameter rhoConstFresh, a reference density of fresh
1316      water, to remove the fresh water flux's dependence on rhoNil. The default
1317      value is 999.8 kg/m^3
1318    o cleanup up external_forcing.F and external_forcing_surf.F
1319      - can now be used by both OCEANIC and OCEANICP
1320    checkpoint46h_pre
1321    
1322     Added code to convert surface volume flux (fresh water) into
1323     a mass flux when using P coordinates in the ocean (OCEANICP).
1324     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1325    
1326    checkpoint46g_post
1327    o Include a new diagnostic variable phiHydLow for the ocean model
1328      - in z-coordinates, it is the bottom pressure anomaly
1329      - in p-coordinates, it is the sea surface elevation
1330      - in both cases, these variable have global drift, reflecting the mass
1331        drift in z-coordinates and the volume drift in p-coordinates
1332      - included time averaging for phiHydLow, be aware of the drift!
1333    o depth-dependent computation of Bo_surf for pressure coordinates
1334      in the ocean (buoyancyRelation='OCEANICP')
1335      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1336        Theta, Salinity, and Pressure in the parameter list. This routine is
1337        presently contained in find_rho.F. This routine does not give the
1338        correct density for 'POLY3', which would be a z-dependent reference
1339        density.
1340    o cleaned up find_rho
1341      - removed obsolete 'eqn' from the parameter list.
1342    o added two new verification experiments: gop and goz
1343      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1344    checkpoint46g_pre
1345    
1346    checkpoint46f_post
1347    o Enable tangent linear (forward mode) gradient checks:
1348      - extended active file handling to g_... files
1349      - added TANGENT_SIMULATION to theSimulationMode
1350      - extended grdchk package accordingly
1351    o added tangent linear setup in verification/carbon/code_ftl
1352    o added adjoint setup in verification/front_relax/code_ad
1353    
1354    checkpoint46e_post
1355    o Added new equation of state -> MDJWF
1356      - EOS of McDougall et al., 2002, JAOT, submitted
1357      - caveat: the equation of state is only valid for a smaller (more
1358        realistic?) range of values than JMD95P/Z and UNESCO
1359      - added masks to the calculation of pressure in store_pressure
1360      - added more check values for density in check_eos (ini_eos.F), some of
1361        the old check values are out of the range of the MDJWF-eos, so don't
1362        expect perfect matches for those
1363    checkpoint46e_pre
1364    
1365    checkpoint46d_post
1366    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1367      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1368      case of pressure coordinates. eosType='JMD95Z' in
1369      combination with buoyancyRelation='OCEANICP' now causes an error.
1370    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1371      in find_alpha/beta.
1372    checkpoint46d_pre
1373    
1374    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1375      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1376    
1377    checkpoint46c_post
1378    o Changes necessary for ocean in p-coordinates
1379     -  Added new buoyancy relation = 'OCEANICP'
1380     -  Added new parameters = gravitySign (this used to be contained inside
1381        the factor dRdZ which I added when we first switched to R coordinates).
1382     X GM/Redi is not compatible (yet)
1383     X bottom drag and no-slip need to be debugged.
1384    checkpoint46c_pre
1385    
1386    checkpoint46b_post
1387    o Added new equation of state -> JMD95Z and JMD95P
1388      - EOS of Jackett and McDougall, 1995, JAOT
1389      - moved all EOS parameters into EOS.h
1390      - new routines ini_eos.F, store_pressure.F
1391    o Added UNESCO EOS, but not recommended because it requires
1392      in-situ temperature (see JMD95)
1393    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1394      unesco.f to be used with POLY3
1395    checkpoint46b_pre
1396    
1397    checkpoint46a_post
1398    o Added (atmospheric) pressure loading
1399      - new field in FFIELDS.h, etc...
1400      - new cpp flag ATMOSPHERIC_LOADING
1401    o Changed hFacC to _hFacC in calc_phi_hyd.F
1402    o Added SHORTWAVE_HEATING to some files for consistency
1403    checkpoint46a_pre
1404    
1405    checkpoint46
1406    further merges from release1_p5
1407    o new ctrl package
1408      - adopted from ECCO environment to enable optimization
1409      - added Eliassen Palm fluxes to controls
1410    o added Eliassen Palm flux controls to gradient check package
1411    o cost package
1412      - Compatible with new ctrl package
1413      - added Eliassen Palm cost hooks
1414      - modif's of existing cost functions
1415    o Adjoint-related bug fixes in kpp:
1416      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1417      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1418    o autodiff package
1419      - flow directives:
1420        + new for S/R do_the_model_io
1421        + enhanced for S/R checkpoint
1422        + new gmredi.flow
1423      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1424        disable adcommon.h/g_common.h by default.
1425      - fixed problem for adjoint of global_max
1426    o modified verification/carbon/
1427    o New setup for adjoint of global_ocean
1428    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1429    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1430    o incorporated hooks for sponge layer code (external_forcing.F)
1431    
1432    checkpoint45d_post
1433    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1434    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1435      (affects plume_on_slope "cg2d" output)
1436    o add new parameter deltaTfreesurf for free-surface time stepping
1437    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1438    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1439    o change phiMin in exp1 (to agree with documentation)
1440    o add new flags:
1441     - T,S forcing inside/outside Adams-Bashforth
1442     - turn off temp,salt advection and/or forcing
1443     - for each tracer, define internal flag for multiDimAdvection & A-B
1444    o monitor: change definition of KE to check conservation of Energy
1445    
1446    checkpoint45c_post
1447    o Removed f90 comments ("!")
1448    o Modified initialisations to enable exf package for MITgcm
1449      (without invoking ECCO_PACKAGE).
1450    o modifications to gradient check package (Martin Losch)
1451      - enable centered differences
1452      - modified format of standard output
1453    
1454    checkpoint45b_post
1455    o cleaned exchange calls in cg2d
1456    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1457    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1458      to configure barotropic setup (Martin Losch)
1459    o moved some initialisations within bi,bj loop in dynamics
1460      (TAF flow dependency)
1461    o in initialise_varia, moved call packages_init_variables
1462      before convective_adjustment_init
1463      (corresponding adjustment of TAF tape initialisation).
1464    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1465    
1466    checkpoint45a_post
1467    o compute Rho over the whole domain (extend iMin,jMin indices)
1468    o specific exchange for X-slice domain (case Ny=1)
1469    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1470    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1471    
1472    checkpoint44h_post = checkpoint45
1473    o Fix to restore differentiability:
1474      place at which packages_init_variables is called in
1475      initialise_varia is crucial for reverse control flow.
1476    o modifications in GMRedi to enable stable adjoint
1477      (corresponding modif's in thermodynamics, dynamics)
1478    o added missing hook for sponge layer code in external_forcing
1479    o modified test cost functions
1480    o storing in gad_advection (plus removal of write(0,*)!
1481    o missing headers TR1.h added in convective_adjustment routines
1482    o errorMessageUnit set non-equal zero in eeboot
1483      (conflict on some platforms, e.g. IBM SP3)
1484    o modified carbon verif.
1485    
1486    checkpoint44h_pre
1487    o vertical grid option: allow to put the Interface at the middle between
1488      2 cell-centers ; replace delZ in pkg/kpp by drF.
1489    o GM Advective form: Tracers are advected using the residual transport (=
1490      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1491    
1492    checkpoint44g_post
1493    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1494      results) ; ifdef missing in thermodynamics.F
1495    
1496    checkpoint44f_pre,checkpoint44f_post
1497    o added PTRACERS package
1498      This allows an arbitrary number of passive tracers to be integrated
1499      forward simultaneously with the dynamicaly model.
1500      + Implemented so far:
1501        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1502        - I/O and checkpointing
1503        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1504      + Not implemented so far:
1505        - KPP
1506        - OBCS
1507      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1508        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1509        line in data.pkg.
1510      + This package is disabled by default since it increases storage.
1511    
1512    
1513    o testscript: added -cleanup option
1514    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1515                 b) enable to filter 2D fields.
1516    
1517    checkpoint44e_pre,post
1518    o re-wrote convective adjustment to use pre-calculated weights
1519      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1520      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1521      Original calls to convect() still in place.
1522    
1523    chkpt44d_pre,post
1524    o added missing EXCLUDE_MONITOR flags
1525    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1526      (incompatible typ in MIN/MAX expressions caused problems
1527      on IBM SP3)
1528    o in genmake added variable MAKEDEPEND
1529      plus resetting for case SunOS
1530    o added timer_stats.c routine for IBM SP3
1531    o removed variables in dynamics
1532    !!! I forgot to create tag chkpt44d_pre !!!
1533    !!! But chkpt44d_pre = chkpt44c_post    !!!
1534    
1535    o real fresh water flux implemented with non-linear free-surface.
1536    
1537    chkpt44c_pre,post
1538    o few fix (mask in shap_s2, EmPmR in external_field_load,
1539      USE_NATURAL_BCS in solve_for_P);
1540    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1541    
1542    checkpoint44b_pre/_post
1543    o merge of relevant stuff from the ecco-branch:
1544      - genmake: removed $S64 overwrite for case SunOS
1545      - pkg/exf: update and corrections for field swapping and obcs
1546      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1547                  harmonized between ECCO and MITgcm
1548      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1549                      updated checkpointing_lev... lists for obcs
1550      - model/src: minor changes in forward_step, plot_field
1551                   added directive for divided adjoint in the_main_loop
1552      - pkg/mdsio: added mdsio_gl_slice
1553    
1554    o check parameters & config (chkpt44a_pre,post)
1555    o OBC and NonLin_FrSurf.
1556    
1557    checkpoint44
1558    o fix bug in mom_vi_del2uv
1559    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1560    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1561    o update AIM experiments (NCEP input files)
1562    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1563    o added some stuff for AD
1564    
1565    checkpoint43
1566    o added two new advection tests
1567    o added global 4x4 degree ocean test
1568    o added test of H&S94 with free surface on cube
1569    o some final mods for gradient check, adjoint,...
1570    
1571    checkpoint42
1572      Fixed AD-related problems:
1573    o Store directives up-to-date with re-arranged Adams-Bashforth
1574      (mainly thermodynamics.F)
1575    o New store directives for multi-dim. advection schemes
1576      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1577      * new common block and key passkey
1578      (mainly gad_advection.F)
1579    o Modified store directives for split of dynamics/thermodynamics
1580      for the case ALLOW_KPP
1581    o Cleaned argument list for timestep_tracer.F
1582    
1583    checkpoint41
1584    o re-formatted/added comments in prologues of key subroutines
1585      to work with protex
1586    
1587    checkpoint40
1588    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1589    o added FLT (floats) package from Arne along with demo. experiment
1590    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1591      implementation of forward-in-time forcing terms
1592    o more mods for non-linear free-surface including new variable
1593    o modified multi-dim method to work on cube
1594    o bug fix in KPP (from DM)
1595    
1596    checkpoint40pre9
1597    o added DST advection schemes
1598    o fix MPI bug on SGI's
1599    o modifications for non-linear free-surface
1600    o fixed conditionals for fixed flow/passive tracer only mode
1601    o added tension/strain form of stress tensor
1602    o changes to commenting of arguments for TAF/TAMC
1603    o added/updated many matlab scripts
1604    o added multi-dimensional advection method for tracers
1605      
1606    checkpoint40pre8
1607    o new package rw/
1608      Added method for dumping intermediate local arrays:
1609      mdsio_writetile - same as mdsio_writefield except works from inside
1610                        bi,bj loop
1611      mdsio_writelocal - same as mdsio_writetile except works for local
1612                         arrays
1613      write_local_r? - higher-level wrapper for mdsio_writelocal
1614      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1615      Example given at end of mom_vecinv.F that dumps some local arrays.
1616    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1617      control flux-form versus vector invariant code.
1618      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1619      or genmake -DISABLE ...
1620    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1621      (additional storing is now needed for case vecinv;
1622      currently nothing implemented to switch this storing off
1623      in case fluxform is used since no CPP flag available).
1624    
1625    checkpoint40pre7
1626    o bug fix in dynamics.F
1627      calc_viscosity called before k=1,Nr loop.
1628    o added some #ifdef's ALLOW_PASSIVE_TRACER
1629    o cleaned initialisations in ctrl_map_ini
1630      related to TAF
1631    
1632    checkpoint40pre6
1633    o split dynamics into thermodynamics & dynamics
1634    o corresponding split of calc_diffusivity into
1635      calc_diffusivity, calc_viscosity
1636      (kpp_calc_diff, kpp_calc_visc).
1637    o Added diffkr, kapgm to control variables
1638    o bug fix in gmredi_slope_limit for ldd97
1639    
1640    checkpoint40pre5
1641    o proper initialization of Adams-Bashforth time stepping
1642      + uses forward step for very first step of model (iter=0)
1643    o re-generated *all* output since almost all output is modified by this
1644      change (sorry but we've been putting this one off for about 2 years)
1645      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1646        *not* regenerated since they are already out of date and I don't
1647        want to create the impression that they are suddenly working.
1648    o removed KAP stuff for DEC's
1649    o modified/added many .cvsignore files in */code and */input
1650    o added new expt "solid-body.cs-32x32x1"
1651      + this uses an alternative form of ini_curvilinear_grid.F which
1652        is not necessarily any better than the current one...
1653    
1654    checkpoint40pre4
1655    o added re-initialisations of utrans,vtrans,rtrans in
1656      calc_common_factors which are crucial for TAF.
1657    o extended iMin,jMin range for calc_common_factors,
1658      calc_diffusivity
1659    o added option ALLOW_PASSIVE_TRACER
1660    o a few minor updates and fixes
1661    
1662    checkpoint40pre3
1663    o created calc_gtr1.F for gad package
1664    o split the_main_loop and re-introduced forward_step
1665    o some recomputations of nIter0 for TAMC
1666    
1667    checkpoint40pre2
1668    o Updated to latest branch of AJA, JMC
1669    o Added gradient check package
1670    o Added routines for passive tracer handling
1671    o Added carbon sequestration sensitivity experiment
1672    
1673    checkpoint39
1674     o Modifications and fixes to support TAMC
1675       (mainly missing or wrong directives)
1676     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1677       in addummy_in_stepping
1678     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1679     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1680     o Included following packages:
1681       cal: calendar
1682       exf: external forcing
1683       ecco: essential routines to control use of cal, exf
1684             (NB: this is not the full ECCO environment)
1685     o disabled some packages by default in genmake
1686    
1687    checkpoint38
1688     o see notes_c37_adj.txt
1689     o corrected wrong layer index in external_forcing_t
1690     o replaced the_main_loop/forward_step by the_main_loop
1691     o removed forceoutput from write_state
1692       (replaced criteria for initial/final state)
1693     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1694    
1695    checkpoint37
1696     o mdsio.F routine split and packaged in pkg/mdsio
1697       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1698        used unless genmake -disable=mdsio)
1699     o allow a more precise surface-geopotential gradient for the atmosphere
1700       taking into account the change in space of Alpha (=1/rho) at the surface.
1701     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1702       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1703     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1704       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1705       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1706     o Time-Average diagnostics defined as a pseudo package "timeave".
1707     o pickup files : old pickup (before c35) did not work with new code (c35
1708       and after) unless activating 2 commented lines in initialise-varia.
1709     o Non-Hydrostatic pickup file Pb fixed.
1710     o bug with Rigid-lid version (since c35) fixed.  
1711    
1712    checkpoint36
1713     o implement Crank-Nickelson barotropic time-stepping
1714     o recover Time-Average diagnostics
1715     o fix Pb in checkpoint (PR#19)
1716     o AIM become a standard package ; clean unused CPP_kees
1717    
1718    checkpoint35
1719     o subtantial rewrite of dynamics.f
1720     o allows staggered time-stepping
1721     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1722     o added bottom drag (linear + quadratic)
1723    
1724    checkpoint34
1725     o Modified exchange routines for correct reverse simulation.
1726     o Added verification output to comply with bug fix in impldiff.F
1727       as of c33 (exp2, natl_box).
1728     o Corrected store directives in dynamics.F
1729     o Corrected array boundaries in impldiff.F
1730     o Corrected array dimensions in gmredi.
1731       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1732     o Added routine GLOBAL_SUM_INT to global_sum.F
1733     o Added mdsio_gl.F for ECCO purposes.
1734    
1735    checkpoint33
1736     o Fixed bug in lower BC in impldiff.F
1737     o Fixed confusion about units of forcing arrays in FFIELDS.h
1738       namely Fu,Fv,Qnet,Qsw,EmPmR:
1739       - Removed verification/natl_box/code/external_fields_scale.F
1740         (did not differ from that in model/src)
1741       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1742         (see FFIELDS.h for description)
1743       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1744         kpp_calc.F and kpp_transport_t.F
1745       - Removed model/src/external_fields_scale.F and calls to it
1746       - verification/natl_box uses flux data with "atmospheric" sign so
1747         a special version of external_fields_load.F is used to
1748         change the data as it's read in. This way, the arrays
1749         have the right units and signs at all times tha a user could
1750         possibly use them.
1751     o Corrected genmake to delete a temporary file during configuration
1752    
1753    checkpoint32
1754     o Scaling of forcing fields moved from external_forcing.F to
1755       external_fields_scale.F, called directly after loading fields.
1756     o Surface relaxation terms added to surface tendency fields in
1757       extra subroutine.
1758     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1759       fields.
1760     o Changes in GMRedi to comply with packaging structure.
1761     o Modifications and bug fixes in KPP package.
1762     o Verification experiment for KPP added (verification/nat_box/)
1763    
1764    checkpoint31
1765     o Packages interface brought in line with defined standard
1766       -> new routines packages_...F
1767       -> changes in initialise_fixed.F, initialise_varia.F
1768       -> enables initialisation interface for ECCO package
1769     o Rescaling of external forcing fields immediately after read
1770       (removed from external_forcing.F)
1771       -> new: surface_fields_scale.F
1772       -> affects ini_foorcing.F, external_fields_load.F
1773     o Computation of surface tendencies before tendency updates.
1774       -> new: external_forcing_surf.F
1775     o Change of variable names useGMRedi, useKPP, useECCO
1776     o Further changes in dynamics.F, impldiff.F for TAMC
1777     o Tested for experiments 0, 2, 4.
1778       - not yet tested for GMRedi.
1779       - not yet tested for KPP.
1780    
1781    checkpoint30
1782     o Updates for OBCs
1783     o New experiment for test OBCs (internal_wave)
1784     o New output.txt in verification/exp4/results/
1785     o Updates for KPP: calculation of viscosity corrected, new variables
1786       kpp_dumpFreq and kpp_taveFreq
1787     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1788       and entry for T90 in genmake
1789    
1790    checkpoint29
1791     o packaged KPP and GM/Redi
1792    
1793    checkpoint28
1794     o Corrected initialization of hFacMin for difference vertical coordinates
1795     o Modified calculation of partial cell thickness to more robust algorithm
1796     o config_summary.F: replaced write_1D_... by write_0D_...
1797       read_write.F: added subroutines write_0D_...
1798     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1799       included some initialisations required for TAMC.
1800     o routine calc_isoslopes: modified sqrt computation to make it
1801       differentiable for zero argument.
1802     o routines dynamics, impldiff:
1803       included store directives and tape key computations required for TAMC.
1804     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1805    
1806    checkpoint27
1807     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1808       formulation works properly with variable resolution.
1809     o restructured the calling tree between the_model_main() and dynamics()
1810     o split initialise() into initialise_fixed() and initialise_varia()
1811     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1812       in new routine ini_psurf()
1813    
1814    checkpoint26
1815     o moved some #ifdef in optional routines to encompass everything
1816       except the argument declarations. This was using up some memory.
1817     o fixed macros like _ADT to work with both versions of Linux cpp
1818     o cleaned up some unused and uninitialized variables
1819       (helps when debugging with strict compile options)
1820     o split up CPP_EEOPTIONS.h into options and macros
1821       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1822     o patch for 2 processor JAM mode
1823    
1824    checkpoint25
1825     o updates for OBCs and NH
1826     o dramatically reduced memory usage
1827     o added "JAM" routines for use on Artic network
1828     o parameterization of convection by implicit vertical diffusion
1829     o added a diagnostic of convective index
1830     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1831       (this is was partly for OBCs and NH but also in anticipation of
1832        an explicit free-surface option)
1833     o initial state input files for U and V
1834    
1835    checkpoint24
1836     o Removed some spurious "REAL"s
1837     o Updated KPP to latest version from JPL
1838     o Added a COS(latitude) in horizontal viscosity
1839    
1840    checkpoint23
1841     o Added del^4 diffusion for salt and temperature
1842     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1843    
1844    checkpoint22
1845     o Made many small changes: implicit none, format(i5), etc...
1846     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1847    
1848    checkpoint21
1849     o Introduced new I/O package that supports direct-access records (mdsio.F)
1850     o Split-up mid-level I/O routines
1851     o Updated input data for experiments 0,1,2,4 and 5
1852     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1853    
1854    checkpoint20
1855     o Tidied up open-boundaries some more
1856     o Added non-hydrostatic code
1857     o Fixed some input data
1858     o Modified MPI start-up to work in "coupled" context.
1859    
1860    checkpoint19
1861     o Tidied up directory structure for verification experiments.
1862     o Added new code for open boundaries.
1863     o Corrected advective terms near boundaries.
1864     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1865     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1866     o Split default parameters out of ini_parms.F into set_defaults.F.
1867    
1868    checkpoint18
1869     o Further changes for optional code generation with
1870       CPP - ugh!
1871    
1872  checkpoint17  checkpoint17
1873   o Beginning to incorporating modularity   o Beginning to incorporating modularity
1874     for supporting atmos. and ocean configs.     for supporting atmos. and ocean configs.

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