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revision 1.41 by heimbach, Fri Jul 13 18:08:14 2001 UTC revision 1.362 by mlosch, Fri Oct 1 16:15:29 2004 UTC
# Line 2  $Header$ Line 2  $Header$
2    
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o non-hydrostatic code
7      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
8        in calc_gw.F
9      - defaults to viscAh
10      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
11        friction or Leith) in non-hydrostatic mode, as long as there is
12        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
13    o pkg/cost
14      extend simple cost functions to treat time mean quantities
15      (T,U,V) via cost_accumulate_state from cost_tile
16    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
17        be 2 times larger than the minimum size the advection scheme requires.
18        now get a perfect conservation of salt in advect_cs test-exp (updated)
19    o GGL90 (Gaspar's TKE mixed layer)
20      - add horizontal diffusion of TKE, requires exchanges in
21        do_fields_blocking_exchanges, horizontal diffusivity is zero by
22        default. In OPA there is no horizontal diffusion of TKE but the
23        mixing coefficients are computed from a horizontal average of TKE of
24        6 points or so. I think that diffusion has a little more physical
25        justification.
26      - clean up ggl90_calc in the hope of reducing memory usage (this hope
27        was in vain)
28      - mask tke-variable in ggl90_init
29    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
30    o fix biharmonic diffusion on CS-grid.
31    o more obcs stuff
32      - added obcs_external_fields_load as an alternative to the EXF-pkg option
33        for reading boundary values. This routine is called from
34        obcs_prescribe_read
35      - updated obcs_check
36      - changed sponge layer relaxation parameter units for days to seconds
37      - turned off sponge layer by default
38      - changed argument list of OBCS_CALC to myTime+deltaTclock
39      - fixed about 35 bugs in obcs_external_fields_load
40    
41    checkpoint55c_post
42    o obcs stuff
43      - new runtime flags useOBCSprescribe, useOBCSbalance
44      - re-arranged obcs_calc
45      - moved exf_getobcs to obcs_prescibe_read
46        obcs_prescibe_read is called after ORLANSKI stuff
47        and independent of it (executable can contain all).
48      - updated obcs_check
49      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
50        These may be necessary only if tangential velocities are
51        prescribed at OB, not sure, needs testing.
52    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
53      which simplifies the calls and passes the ifc check-bounds test
54    
55    checkpoint55b_post
56    o add a 2D scalar, Z location, exchange_2 routine.
57    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
58      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
59      affects advect_cs results (for the wrong reason): update output.txt
60    o use a more standard discretization for biharmonic viscosity ;
61     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
62      affects results of dome set-up: update output.txt
63    o fix gad_advection.F (CubedSphere part), back to version 1.23
64    o fix bug in mom_vi_del2uv.F (CubedSphere part).
65    
66    checkpoint55a_post
67    o merged code to
68      * prescribe/read time-dependent open boundaries
69        (works in conjunction with exf, cal)
70      * sponge layer code for open boundaries
71      * each boundary N/S/E/W now has its own CPP option
72        (healthy for the adjoint)
73    
74    checkpoint55
75    o up-to-date adjoint of previous breaks
76      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
77      - global_ocean_ebm: adjoint still needs fix (TLM ok)
78      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
79      - carbon: * remove tr1-related adjoint verification
80                * add ptracer as control variable
81    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
82      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
83    
84    checkpoint54f_post
85    o in verification/carbin/ remove experiment related to
86      ALLOW_PASSIVE_TRACER (array tr1 etc)
87      code_ad/ input_ad/ results_ad
88    
89    o add two new packages
90      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
91        + subject to optimization (memory)
92      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
93        + subject to reordering (many GOTOs in the original code)
94        + so far opps is called for every (i,j) point, and then operates in
95          the vertical; one may want to reorder the scheme in order operate in
96          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
97          fields)
98    o overhaul of IO so that we now have flags for MDSIO and/or MNC
99      - all verification tests compile and run with linux_ia32_g77
100      - defaults are compatible with current input files--nothing
101        should change if you were not previously using MNC
102      - MNC output has been added in numerous places (eg. timeave)
103        but there are still a few writes not yet do-able with MNC
104        (this is in progress)
105      - flags now allow for either/or/both use of MDSIO and MNC and
106        documentation will soon follow
107      - numerous small formatting cleanups for ProTeX
108    o add version info (via BUILD_INFO.h) to MNC and stdout
109    
110    checkpoint54e_post
111    o add two new packages
112      - pp81 (Packanowski and Philander, 1981), Richardson number and
113        stratification dependent mixing
114      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
115      - these scheme operate in a similar manner as KPP (without ghat, of
116        course), however there is only one diffusivity that is used for both
117        temperature and salinity (and passive tracers)ç
118    o add offline package
119    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
120      provided by Stephanie Dutkiewicz
121    o genmake2: add ability to search for C compilers and cleanup test output
122      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
123    
124    checkpoint54d_post
125    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
126    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
127      leading to additional shift by 5 days each year of integration
128       (i.e. leading to considerable offset over the years)
129    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
130    o start with no AB and no initial filtering (staggerTimeStep):
131      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
132    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
133      (external loading & cpl import/export stay in forward_step.F)
134    o update coupling interface to work with new staggerTimeStep
135    o change MDSIO ptracers_pickup.
136    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
137    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
138    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
139    
140    checkpoint54c_post
141    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
142      this affects (truncation error) output.txt of test-exp:
143       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
144    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
145    o change Qnet to always be the net heat flux, (+upward).
146      affects (truncation error) output of natl_box exp.: updated
147    o define the max number of passive tracers in PTRACERS_SIZE.h
148    o start to test mnc routinely in exp0
149    o add sea-ice loading (sIceLoad) as a new forcing field.
150    
151    checkpoint54b_post
152    o add testreport "-j JOBS" option for parallel builds (tested and pretty
153       impressive on Altix and Opteron systems)
154    o diagnostics can now write NetCDF files through the mnc package
155    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
156    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
157    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
158      affects (truncation error) output of lab_sea & natl_box exp.: updated
159    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
160    
161    checkpoint54a_post
162    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
163    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
164    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
165    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
166      + internal_wave (shift in writing cg2d_ini_res)
167    checkpoint54a_pre
168    
169    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
170      - modified verification/lab_sea and natl_box_adjoint accordingly
171    
172    checkpoint54
173    checkpoint53g_post
174    o prepare splitting of thermodynamics: store convect.counter in common block
175    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
176      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
177    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
178    o new parameter "nShapS": allow to treat differently S from T (nShapT)
179    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
180    o restore adjointability
181    
182    checkpoint53f_post
183    o modifications that affect AIM experiment results (update output.txt):
184      - no advection of S at top interface Nr (pkg/generic_advdiff)
185      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
186    o AIM pkg:
187      - include stability function into surf.Flux derivative relative to Tsurf
188      - calculate clear-sky radiation & surface temp. change (for diagnostics)
189    
190    checkpoint53e_post
191    o merged cylindrical coord configuration
192    o added rotating_tank experiment
193    checkpoint53e_pre
194    
195    checkpoint53d_post
196    o faulks upgraded: re-generate output.txt that have changed:
197       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
198    o Added Bryan and Lewis, 1979, vertical diffusivity profile
199    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
200    o added Sadourny discretization of Coriolis
201      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
202      - re-enabled use of omega3 (useAbsVorticity)
203    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
204      vector-invariant equations
205      - note: does *NOT* yet use same variable visc. for no-slip BC's.
206    o recoded the lateral boundary conditions for non-hydrostatic w, this time
207      hopefully without new bugs
208      - still to do: biharmonic friction for non-hydrostatic w
209    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
210    o regenerated output for global_ocean_ebm (using -ieee)
211    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
212      of mom_common/
213      - simple re-arrangement of instructions within computing loop
214    checkpoint53d_pre
215    
216    checkpoint53c_post
217    o new version of coupler for AIM+thSIce and Ocean models
218     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
219     - land: change Evaporation of snow
220     - aim with thSIce: fix bug in snow-precip.
221    o changes to calc_gw.F
222     - bug fix for w^2 term near the bottom boundary
223     - (hopefully) improve the lateral slip boundary condtions for use with
224        partial/looped cells
225      - because the bug fix changes two verification experiments anyway (exp5
226        and plume on slope), change the lateral boundary condition from half slip
227        to the value of no_slip_sides
228    o ebm package wasnt quite up to the parallel task. Fixed that.
229    o Adjoint of EBM package + verification
230      * TLM OK
231      * ADM not sufficient accuracy yet (needs further testing)
232    
233    checkpoint53b_post
234    o Commiting new energy balance model to repository
235      * package is pkg/ebm
236      * verif. is verification/global_ocean_ebm
237      * references are in ebm_driver.F
238    C      * X. Wang, P. Stone and J. Marotzke, 1999:
239    C        Global thermohaline circulation. Part I:
240    C        Sensitivity to atmospheric moisture transport.
241    C        J. Climate 12(1), 71-82
242    C      * X. Wang, P. Stone and J. Marotzke, 1999:
243    C        Global thermohaline circulation. Part II:
244    C        Sensitivity with interactive transport.
245    C        J. Climate 12(1), 83-91
246    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
247    C        Destabilization of the thermohaline circulation
248    C        by atmospheric eddy transports.
249    C        J. Climate 7(12), 1870-1882
250    o Will need long integration testing.
251    checkpoint53b_pre
252    
253    o created pkg/mom_common in preparation for variable viscosity code
254    o renamed and split ini_mnc_io
255    o pkg/land: only liquid water can diffuse or run-off
256    o AIM using land: soil wetness availability account for snow
257    o added printMapIncludesZeros to EEPARMS namelist
258    
259    checkpoint53a_post
260    o restore TAMC compatiility for exf_constants.h
261      (no usage of _d in .h)
262    o Additional storing in KPP in an attempt to fix
263      TAMC problem with adjoint of KPP code.
264      (no success...)
265      Identical code works fine with TAF.
266    o Fixed verification/natl_box_adjoint experiments.
267      Initial conditions for Experiments 4 and 5 are now
268      set to "SEAICE_initialHEFF=0", which is more reasonable,
269      and hence gives results closer to that of Experiment 2.
270      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
271    
272    checkpoint53
273    o stable checkpoint with up to date adjoint
274      TLM tests only run for 1st grdchk at the moment. Its unclear if
275      this is a code problem or a problem with resetting code for g_
276      variables that is being autogenerated wrong.
277      Otherwise:
278       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
279       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
280         are both still in chaos following their security messes.
281    
282    checkpoint52n_post
283    o various build (mostly genmake2) changes including:
284      - ability to build/run more easily within Cygwin and MacOS X
285      - more complicated Makefiles with a stronger dependence on Gnu Make
286    o pkg/seaice modifications
287      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
288        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
289        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
290      - changed proxy for geostrophic velocity and updated
291        verification/lab_sea/results/* accordingly
292      - removed ADI dynamic solver from pkg/seaice
293      - replaced all occurrences of 1/CSTICE or 1/CSUICE
294        they caused a segmentation fault under certain circumstances
295      - removed unused field WATR
296    o bug fix in exf-package:
297      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
298         now reflect that.
299    o small fixes in the cal-package:
300      - set reference date to first of January for the 'model'-calendar
301      - failing of cal_CheckDate in cal_FullDate now actually results in a
302        warning
303    o small modifications in exf-package to increase flexibility:
304      - change climtempfreeze from a constant to a runtime parameter that
305        is specified in data.exf_clim (default = -1.9)
306      - introduce runtime parameter windstressmax (default = 2.0) that is
307        specified in data.exf
308    o fix in pkg/thsice:
309      - update Evap (Tsf changes) to be consistent with Latent heat flux
310      - maintain snow precipitation unchanged (even if Tsf >=0).
311     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
312    
313    checkpoint52m_post
314    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
315      this does not change any of the results, because myIter=0 in swfrac always
316      lead to jwtype=2 (the default anyway), but the call makes little sense
317      as a default
318    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
319    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
320      atmospheric model (AIM) to use it ; add a "slab ocean" component.
321    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
322    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
323    o extending useSingleCpuIO option to work with new exch2 I/O format
324      - old-style, missing-tile I/O is still accessible by defining CPP
325        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
326    o monitor package can write to NetCDF files and/or STDOUT
327    o fix re-definition bug in MNC_GRID_INIT_ALL()
328    o doc/api_reference added
329      - a framework for building an API Reference Manual using all
330        the "protex" comments embedded in the code
331      - see pkg/generic_advdiff, pkg/mnc for examples
332    o MNC:
333      - make myThid the last argument for all subroutines
334      - new default for the grid files: NO halos
335      - add useMNC and other run-time flags
336      - separate per-file-group handling of the unlimited dimension
337      - early initialization of MNC w/ flags read at the eeboot stage
338        and lookup tables set in initialize_fixed
339      - write all MNC output to a freshly-created directory
340    o thermodynamics sea-ice (thsice) is now tested with testreport.
341    o test exp. advect_cs: use the standard cs32 grid ; update output.
342    o Added functionality to grdchk:
343      pick global i,j,k position (or nearest wet) where to perform check.
344    
345    checkpoint52l_post
346    o new land formulation:
347      a) use ground enthalpy as prognostic variable to ensure exact
348         energy conservation.
349      b) account for water temperature and for latent heat of freezing
350         in all processes (rain, run-off, ground storage)
351      c) compute surface and ground temperature implicitly.
352    o aim_v23 modification for new land model:
353      a) Treat separately land / ocean / sea-ice surface fluxes
354         to allow implicit computation of land & sea-ice surface temp.
355      b) add snow precipitation.
356    checkpoint52l_pre
357    
358    o fix problem (when 1 tile is empty) in min/max monitor.
359    o fix bug in timeAve (u,vZetatave in common block)
360    o no restoring terms under ice for pkg/seaice
361    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
362    o bug fix for pkg/seaice pickups
363    o change MNC call locations and add coordinate attributes
364    o mask vorticity at the corner ; affects global_ocean.cs output
365    o fix ini_curvilinear_grid ; test CS experiments with mpi
366    o aim.5l_cs: modify sea-ice fraction input file ; update output
367    o exf: Adding simple range check routine for exf fields after read
368    
369    checkpoint52k_post
370    o removed top-level directory "diags"
371      - we migrated these functions to pkg/timeave a long time ago
372    o fixed bug introduced in pkg/monitor
373    o accuracy ctrlprec = 32 insuffient for gradient checks using
374      averaged fields (I/O via cost_averages)
375      -> use ctrl.h in active_file*.F to control I/O precision.
376    o paramter list of CALL ADTHE_MAIN_LOOP
377    o added initial do_the_model_io to ecco
378    o set all ...Freq to zero after cost_final
379      taveFreq, dumpFreq, pChkptFreq
380    o MAIN and ECCO differentiability restored
381    
382    checkpoint52j_post
383    o fix nchklev in tamc.h for global_ocean...
384    o Bringing flow and store directives up-to-date
385    o Really weird thing!
386      call do_the_model_io from the_main_loop with parameters
387      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
388      TAF places a faulty re-call of initialise_varia
389      after cost_final call which should not be there!
390    checkpoint52j_pre
391    
392    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
393      error messages
394    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
395    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
396      debug output
397    o modfied mdsio_writefield.F to handle non-global files under exch2
398    o update AIM Cubed-Sphere exp (aim.5l_cs):
399      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
400    o update AIM Equatorial Channel exp:
401      use standard aim_v23 pkg and change the SST fields to be more realistic.
402    o globalFile now works with exch2
403    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
404      mon_vort3.F to make exch2 friendly with >1 tile per cube face
405    o limit timeave output for hi-res integrations
406    
407    checkpoint52i_post
408    o removed CPP_EEOPTIONS.h from verification/*/code
409    o updated the tiling for global_ocean_pressure
410    checkpoint52i_pre
411    
412    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
413      the old pkg/aim).
414    
415    checkpoint52h_pre
416    o shortened offending lines in exch2_send_rx?.template
417    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
418    o genmake2: add build & execute test for NetCDF code
419    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
420      old grid files, moved CPP_EEMACROS.h to pkg/exch2
421    o added useSingleCPUIO flag to monitor.F and mon_out.F
422    o added temporary hack for sea-ice dynamics on the cube:
423      metric terms are ignored and it is assumed that
424      there is no sea-ice on cube faces 1, 2, 4, and 5.
425    
426    checkpoint52f_post
427    o added exch2 cube routines to pkg/exch2
428    o modified hs94.cs-32x32x5 to use it
429    o added new grid files to hs94.cs-32x32x5
430    checkpoint52f_pre
431    
432    checkpoint52e_post
433    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
434      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
435    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
436      to work with implicit vertical advection and AB ;
437    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
438    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
439     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
440    checkpoint52e_pre
441    
442    o fix bug in impldiff when Nr=1 or Nr=2.
443    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
444    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
445    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
446      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
447    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
448    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
449    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
450    
451    checkpoint52d_post
452    o re-tiled many expts to allow comparison in multi-processor mode
453      - updated output accordingly
454      - changed hs94.128x64x5 to use intial T from file rather than use the
455        random number generator
456    o add infrastructure in model routines for fizhi and gridalt packages
457    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
458    o changes to permit hi-res, cubed-sphere, configuration
459      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
460      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
461      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
462        of surface winds for the cube
463      (A verification experiment, based on global_ocean.cs32x15, but with
464       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
465       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
466       complete with example surface forcing files and matlab scripts to look
467       at the output and compare it with that of global_ocean.cs32x15.)
468    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
469       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
470       to conform to the common rule.
471    o check-in the first version of the coupler + interfaces for multi-components
472       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
473       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
474       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
475       - ocean and atmos. share the same horizontal grid (no interpolation).
476       - exchanges between component and coupler is done in forward_step
477    o new verification experiment, cpl_aim+ocn:
478       coupled ocean - AIM atmosphere on cs32 grid.
479    
480    checkpoint52d_pre
481    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
482    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
483    
484    checkpoint52c_post
485    o Fixing OPTIONS files for use of exf:
486      - ALLOW_ECCO not needed
487      - ECCO_CPPOPTIONS.h should not be included from
488        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
489        as has been the case in the past
490      - All cal/exf related options are currently set in
491        single header file. Should remain so until we
492        agree on a consistent new policy.
493    o Removed all CPP options for cal package.
494      cal has no more CPP options.
495    o modified STOREs in GAD_ADVECTION
496    o corrected key comp. for passkey
497    
498    checkpoint52b_post
499    o new version: "thsice" of thermodynamic sea-ice pkg:
500     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
501     - modify fluxes but do not change theta directly;
502     - light cleaning of bulk_force pkg (still needed with thsice).
503     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
504       + output_thsice.txt to test thsice & bulk_force pkgs.
505    o put back grid & coriolis monitor output.
506    checkpoint52b_pre
507    
508    o call "do_the_model_io" at the beginning (=> dump initial state)
509    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
510    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
511      (need info on NUMBER_OF_PTRACERS)
512    o missing PTRACERS headers in some routines
513    o default tamc.h in pkg/autodiff supposed to crash
514      to ensure proper customization
515    
516    checkpoint52a_post
517    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
518      - moved surfaceTendencyTice from pkg/seaice to main code
519      - subroutine FREEZE_SURFACE now limits only surface temperature
520        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
521        => new output.txt for global_ocean.cs32x15 & global_with_exf
522      - keep the old version of FREEZE for backward compatibility;
523        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
524      - corresponding modifs for TAF directives
525    o added surface flux output variables to TIMEAVE_STATVARS
526    o time-averaged output for pkg/ptracers
527    o fix problem with ECCO-related divided adjoint
528      snapshot file was missing some ad-variables,
529      but no warning issued by TAF
530    
531    checkpoint52a_pre
532    o some bug fixes for #undef REAL4_IS_SLOW
533    
534    checkpoint52 = ecco_c52_e35
535    o after testing adjoints of checkpoint51u_post
536    
537    checkpoint51u_post
538    o this is the post-merge tag of the ecco-branch
539      (needs another clean checkout and re-testing)
540    o various natl_box_adjoint configs and results
541      but no input fields
542    o obcs adjoint not yet merged!
543    o adding ECCO global 1x1 and 2x2 degree configs
544    o updated/extended some store directives for seaice
545    o pkg/ecco now containes ecco-specific part of cost function
546    o top level routines the_main_loop, forward_step
547      supersede those in model/src/
548      previous input data.cost now in data.ecco
549      (new namelist ecco_cost_nml)
550    o in ctrl/ cleaned some cross-dependencies and updated CPP options
551    
552    checkpoint51t_post
553    o this is the pre-merge tag of the ecco-branch
554    
555    checkpoint51s_post
556    o cleanup: removed various obsolete #define-s
557    o pkg/grdchk
558      - renamed 'ph-grd 3' to 'grad-res'
559      - merged from ecco-branch
560        (remaining bug fixes for obcs gradient checks)
561      - additional high-precision output for testreport
562        (grep for 'precision_grdchk_result')
563    
564    checkpoint51r_post
565    o cleaned up or removed CPP_OPTIONS.h files
566    o updated results for some of the tests to reflect the new
567      optfiles (-ieee: -O0 instead of -O3)
568    
569    checkpoint51q_post
570    o cd_code:
571      - moved cd_scheme.F -> cd_code_scheme.F
572      - separate read_checkpoint from cd_code_ini_vars.F
573      - separated cd_code part from write_checkpoint
574      - updated AD_SOURCE, generated .flow
575      - added CD_CODE_VARS.h to the_main_loop
576      - Moving cd_code specific store dir.s to pkg/cd_code
577    o ctrl package totally restructured
578      - pack/unpack now optional and decoupled from
579        xx_/adxx_ I/O
580      - ctrl_pack/unpack cleaned
581        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
582      - confined inclusion of AD_CONFIG.h to where necessary.
583    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
584    
585    checkpoint51p_post
586    o create initial cd_code package
587      - WARNING: the initialization of fields within packages
588        is broken because INI_FIELDS (where READ_CHECKPOINT is
589        called) is called *before* PACKAGES_INIT_VARIABLES.
590        This seems to be backwards since
591        1) its important to initially zero the entire field including
592           the "halo" region
593        2) zeroing needs to be done *before* reading pickup info
594           and the pickup call might or might not happen in any
595           particular run
596      - this needs an overhaul for R2
597    o cleanup verification/*/code/GMREDI_OPTIONS.h
598    o cleanup testreport
599    
600    checkpoint51o_post
601    o bringing AD-related verif's up to date with genmake2
602      - carbon/
603      - global_ocean.90x40x15/
604      - hs.94.1x64x5/
605      - (front_relax/ )
606    o (more) consistent directory structure for AD-related verif.'s
607    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
608    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
609    o bug fix in find_alpha.F for MDJWF:
610      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
611        change rho -> rho-rhoConst
612      - replace call find_rho to find_rhonum
613    o initialisation of rFlx extended to full array (required by TAF)
614      and shifted to thermodynamics
615    o removed PTRACERS.h in ptracers routine
616    o added surfacetendencyPtr to S/R parameter list pracers_forcing
617    o Correcting initialisations for fVerU, fVerV.
618    o helping TAF to recognize dependency on kUp for
619      fVerU, fVerV
620    o Replacing delZ by delR in pkg/ctrl/
621    checkpoint51o_pre
622    
623    o undid all of cp51 pending some cleanups and discussion
624    o added the [#include "AD_CONFIG.h"] statement to all files that need
625       it for adjoint/tl #defines
626     o re-worked the build logic in genmake2 to support AD_CONFIG.h
627     o removed tools/genmake since it no longer works
628    
629    checkpoint51n_post
630    o modifications to make FREEZE flux visible to pkg/kpp
631      - moved surfaceTendencyTice from pkg/seaice to main code
632      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
633      - subroutine FREEZE now limits only surface temperature
634        (this means new output.txt for global_ocean.90x40x15,
635         global_ocean.cs32x15, and global_with_exf)
636    o added surface flux output variables to TIMEAVE_STATVARS
637    
638    checkpoint51n_pre
639    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
640    o added [#include "AD_CONFIG.h"] to all files that use the following
641      defines:
642      - ALLOW_ADJOINT_RUN
643      - ALLOW_TANGENTLINEAR_RUN
644      - ALLOW_ECCO_OPTIMIZATION
645    
646    checkpoint51m_post
647    o incorporating changes to get TAMC/TAF working in genmake2
648      - added new TAMC/TAF targets to the Makefile
649      - various cleanups related to package handling
650      - these changes should have no impact on the forward model
651    
652    checkpoint51l_post
653    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
654     - faster algorithm for cal_addtime.F
655     - higher precision arithmetic, where needed
656     - pkg/exf *startdate variables changed from calendar date to
657       model integration time
658    
659    checkpoint51l_pre
660    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
661    o enable to apply restoring on S & T only in a latitude band.
662    o update output (external_forcing_surf modif. change truncation errors)
663       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
664    
665    checkpoint51k_post
666    o change default to: useNHMTerms=.FALSE.
667     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
668       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
669     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
670        exp1, ideal_2D_oce
671     - change data file of oceanic exp (leave the results unchanged for now)
672       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
673    o set gravitySign automatically according to the vertical coordinate used
674      (and change sign: back to "logical" value: +1 when R increases downward)
675    o added an include barrier to the default CPP_OPTIONS.h and
676      removed the #include "PACKAGES_CONFIG.h" from it
677    o fix a bug in mom_fluxform (from chk51j_post)
678    
679    checkpoint51j_post
680    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
681    o adjusted some flow directives (dynamics, thermodynamics)
682    o added cubed-sphere case to test cost function
683    o heckpoint_lev?_directives.h now include
684      pkg-specific directives, whenever those are enabled.
685    o Moving pkg-specific flow directives to corresponding pkg
686      Moving pkg-specific differentiation list to corresponding pkg
687      Moving pkg-specific checkpoint-lev storing to corresponding pkg
688      ---> conventions are
689           - pkg_ad.flow
690           - pkg_ad_diff.list
691           - pkg_ad_check_lev?_dir.h
692    
693    checkpoint51i_post
694    o merge of the branch-genmake2
695      - knowingly breaks the older genmake
696      - automatic generation of all ALLOW_${PKG_NAME} defines
697      - new testreport supersedes older testscript
698    o large number of package inclusion and header cleanups
699    checkpoint51i_pre
700    
701    o new output for adjoin of global ocean vector invariant
702    o fix for checkpoint of thermodynamic seaice and bulk_force
703    o Steph gchem various cleanups
704    
705    checkpoint 51h_pre
706    o fixed some single quotes
707    o modify gchem pkg to be more versatile
708    o modifications to clean up dic pkg
709    o add pkg/cfc
710    
711    checkpoint51g_post
712    o provide links for ARPACK and ADM*TLM
713    o start removing verification/vero/
714    o update AD-related stuff
715      (in particular some IF-statements in model/src/ routines)
716    o adding to verification/global_ocean.90x40x15/ adjoint of
717      vector invariant setup
718    
719    checkpoint51f_post
720    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
721    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
722      of tracer Green's fucntions for ocean inversion project.
723    
724    checkpoint51f_pre
725    o Added on-the-fly spatial interpolation capability
726        "USE_EXF_INTERPOLATION" to pkg/exf.
727      - This is a temporary Cartesian-grid hack until
728        the super-duper ESMF coupler becomes available.
729      - See verification/global_with_exf/README for usage example.
730      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
731        flags and modified pkg/seaice accordingly.
732    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
733        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
734        non-local transport term.
735    
736    checkpoint51e_post
737    o pkg/mom_vecinv:
738      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
739      - add time-ave diagnostic of vorticity advection.
740    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
741    o atmospheric geopotential: - include water vapor effect;
742                                - use p^kappa in p* scaling.
743    o land pkg: read initial state from files.
744    o AIM : add stratospheric drag in the upper level
745    
746    checkpoint51d_post
747    o change function ILNBLNK (=> last non-blank char.) to return zero
748      (instead of the string length) when the string. char is empty
749    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
750    o modif's to restore TAMC compatibility
751      - avoid "_d" constructs in PARAMETER declarations
752      - avoid interrupting lines by comment lines
753    o Use cluster local disks for purely local I/O
754      vs. globally visible disks needed for ctrl stuff
755      (merged from ecco-branch)
756      - new active_file_loc... and mdsio_..._loc routines
757      - affected packages: autodiff, ctrl, grdchk, mdsio
758    
759    checkpoint51c_post
760    o introducing integer flag debugLevel
761      - debLevZero: suppress all output
762      - debLevA: standard
763      - debLevB: equivalent to current debugMode=.TRUE.
764    o introducing pathname variable mdsioLocalDir for mdsio
765      that can be specified at runtime
766      (relevant for cluster I/O to local disk)
767    `
768    >>>checkpoint51b_post
769    adjoint of ptracers
770    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
771    o extended state in checkpoint_lev?, etc.
772    o alternative ctrl/cost with tr1 or ptracer
773    o new comlev1_bibj_ptracers
774    o new ptracers.flow
775    o made ptracers_forcing same as external_forcing_s
776    o added verification for adjoint with ptracers
777      - adm. grdchk fail so far
778      - tlm. grdchk OK
779      - checked tapelev/comlev recomputations: OK
780    <<<checkpoint51b_pre
781    
782    checkpoint51a_post
783    o added code for biogeochemistry package
784      - new pkgs: dic, gchem
785      - new subroutine in ptracers
786    o modify code for biogeo packages
787      - in model/src and pkg/ptracers
788    
789    checkpoint51
790    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
791      - autodiff, ctrl, exf, grdchk, seaice
792      kept separate packages
793      - cost, ecco, obcs
794    o updating verification/internal_wave, verification/lab_sea
795      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
796    
797    checkpoint50i_post
798    o Preparing next differentiable checkpoint and sync
799      of MAIN vs. ecco-branch
800      - 1st step: this one is differentiable
801      - 2nd step: next(! not this) checkpoint will have updated packages
802                  from ecco-branch)
803    
804    checkpoint50h_post
805    o new package "land": provide surface BC for AIM.
806    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
807    o AIM: use true log-P extrapolation for near surface temp (= as in
808        F.Molteni paper) ; update aim.5l_cs output.
809    o New variable in PARM03 for more flexible pickups
810    o somewhat cleaned package initialisation sequence for
811      ctrl/ cost/ ecco/ in packages_... routines
812    
813    checkpoint50g_post
814    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
815      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
816      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
817        made the default because of faster convergence than ADI
818    
819    checkpoint50f_post
820    o exf totally restructured
821      - replaced all exf_set_ routines by one generic exf_set_gen.F
822        and made sure it's still differentiable
823      - split exf_getffields.F into new exf_bulkformulae.F
824      - exf_inscal_/exf_outscal_ suffixes consistent with field names
825      - updated adjoint/makefile and relevant verif. accordingly
826    
827    checkpoint50f_pre
828     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
829          + change Evap over land. (update aim.5l_cs output)
830     o added missing .cvsignores and made uniform across expts
831     o changed configuration of tidal_basin_2d expt
832     o added pkg/debug functions for tracing code in fatal crashes
833     o tidied pkg/monitor to use MONITOR_OPTIONS.h
834     o new fn in pkg/monitor to stop model if solution grows too big
835     o removed lots of single quotes from comments
836    
837    checkpoint50e_post
838    o make KPP work with PTRACERS
839     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
840       nearly a copy of kpp_transport_s
841     - there is no analogue to SurfaceTendencyS, so I have to use
842       gPtr(of the surface layer) instead
843    o add a new platform SunFire+mpi (SunFire 15000) to genmake
844    checkpoint50e_pre
845    
846    checkpoint50d_post
847    o change kpp output from multiple-record state files to single-record state
848      files analogous to write_state.F
849    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
850      analogous to the cg2d-related output.
851    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
852      so that writing to internal file fn (with length 512) fails.
853    checkpoint50d_pre
854    
855    checkpoint50c_post
856    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
857    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
858    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
859    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
860    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
861    
862    checkpoint50c_pre
863    Merging from release1_p13:
864    o bug fix for pkg/seaice dynamic solver
865    o Added SEAICE_initialHEFF to pkg/seaice
866    
867    checkpoint50b_post
868    o store u*,v* in gU,V instead of in guNm1,gvNm1
869    o in order to put the momForcing out of the Adams-Bashforth:
870      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
871      to timestep.F
872    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
873    o re-generate output for highly sensitive test-exp:
874       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
875    
876    checkpoint50b_pre
877    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
878    o corrected CPP option mismatch in exf_Bulk... functions for case
879      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
880    
881    checkpoint50a_post
882    o Bug fix for merging between c50 and KPP.
883      ikey was passed from thermodynamics to kpp_calc via
884      common block rather than being recomputed in kpp_calc,
885      in contradiction with new key itdkey.
886      New key ikppkey created, and tamc.h headers updated.
887    
888    checkpoint50
889    - 2nd step of merge with ecco-branch:
890      merge changes in ecco-branch back into main trunk
891    - bug fix in find_alpha
892    - more storing in gmredi_calc_tensor.F, kpp_routines.F
893    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
894    - merged some sliced AD support routines
895    
896    checkpoint49
897    merged from ecco-branch:
898    o exf:
899      - Enable initialisation of forcing fields to constant
900        (runtime) values.
901      - in exf_getffields.F
902        Reduce i-/j-loop to interior domain, discarding overlaps.
903        That also fixes wrong TAF-key computations for key_1, key_2
904        with bulf formulae.
905      - exf_init.F modify #ifdef for exf_init_evap
906      - exf_getffieldrec.F, ctrl_getrec.F
907        The following INT-usages are not safe:
908          fldsecs  = int(fldsecs/fldperiod)*fldperiod
909          fldcount = int(fldsecs/fldperiod) + 1
910        and were modified.
911    o autodiff: checkpoint_lev...
912      - updated storing for bulk formulae (some arrays were missing)
913      - added state for seaice package
914      - synchronized with main branch
915    o DIVA:
916      Modif.s in
917      - the_main_loop.F
918      - the_model_main.F
919      and added cost_final_restore.F cost_final_store.F
920      o With these changes, it is possible to fully separate
921        the first forward run to compute the cost function (mdthe_main_loop)
922        and adjoint runs over individual DIVA intervals (adthe_main_loop)
923        into separate model executions.
924        This enables better tuning of DIVA to given queue sizes.
925      o Loss of cost function value in consecutive DIVA runs is
926        fixed by storing to 'costfinal' file.
927      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
928        beginning/end of adjoint integration is accounted for.
929      The current changes apply to TAF-1.4.26.
930      TAF has one remaining bug, requiring one manual change
931      (see MITgcm manual).
932    o cal: synchronized between MAIN and ecco-branch
933    
934    checkpoint48i_post
935    o Changes to restore differentiability of code w.r.t. previous tag
936      (mostly adding new routines to make list and replacing
937      pressure by totPhiHyd).
938    o Updated and merged grdchk package
939      - has both ADM and TLM checks
940      - works for single- and multi-proc.
941      - output cleaned
942      - worked successfully for parallel DIVA
943    o genmake:
944      - Adding -platform=SP4
945      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
946    o Modif. for DIVA:
947      ctrl_unpack should not be called in intermediate DIVA interval.
948      (similar thing would apply for active files such as
949      tbar, sbar, psbar, which should not be reinitialised;
950      only relevant for ecco-branch)
951    
952    checkpoint48h_post
953    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
954    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
955    o Added SEAICE_initialHEFF to pkg/seaice
956    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
957    
958    checkpoint48g_post
959    --- EOS:
960    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
961      store total Potential in totPhyHyd for diagnostics & EOS.
962    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
963    --- Pressure/geopotential gradient:
964    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
965    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
966      ( changes results of global_ocean_pressure )
967    o NLFS + z-coord.: add eta*Rho' contribution.
968    o accurate phiHyd when using interface-W at the middle between 2 centers
969     ( changes results of ideal_2D_oce )
970    o includes r* 2nd term in potential gradient.
971    
972    checkpoint48f_post
973    Merging from release1_p12:
974    o Modifications for using pkg/exf with pkg/seaice
975      - improved description of the various forcing configurations
976      - added basic radiation bulk formulae to pkg/exf
977      - units/sign fix for evap computation in exf_getffields.F
978      - updated verification/global_with_exf/results/output.txt
979    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
980      (SBO) core products, including oceanic mass, center-of-mass,
981      angular, and bottom pressure (see pkg/sbo/README.sbo).
982    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
983      to avoid negative values in shallow regions.
984      - updated verification/natl_box/results/output.txt
985      - updated verification/lab_sea/results/output.txt
986    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
987    o Added useSingleCpuIO option (see PARAMS.h).
988    o Updated useSingleCpuIO option in mdsio_writefield.F to
989      work with multi-field files, e.g., for single-file pickup.
990    o pkg/seaice:
991      - bug fix in growth.F: QNET for no shortwave case
992      - added HeffFile for specifying initial sea-ice thickness
993      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
994    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
995      kpp_transport_t.F, forward_step.F, and the_main_loop.F
996    o pkg/seaice:
997      - adjoint-friendly modifications
998      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
999    
1000    checkpoint48e_post
1001    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1002    o dynamics: change definition of computational domain & adapt mom_fluxform
1003      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1004    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1005        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1006        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1007        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1008        inverted_barometer solid-body.cs-32x32x1
1009      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1010    
1011    checkpoint48d_post
1012    o in preparation for r*:
1013     a) use pre-computed gradient of hydrostatic potential:
1014        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1015     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1016        => affects results of glob_oce_pressure (different truncation error)  
1017      update output.txt of ideal_2D_oce & global_ocean_pressure
1018    
1019    checkpoint48d_pre
1020    o in preparation for r*:
1021      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1022      pass the 2 comp. of the grad. as arguments to momentum S/R.
1023      but for the moment, only used if it does not change the results.
1024    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1025    
1026    checkpoint48c_post
1027    Modifications in treatment of initial flux forcing controls
1028    to avoid extra storing of flux fields.
1029    
1030    checkpoint48c_pre
1031    o Added tidal_basin_2d experiment (currently 1D!)
1032    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1033    
1034    checkpoint48b_post
1035    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1036     (modification to pressure gradient not yet implemented)
1037    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1038      (for U & V) that are used for vertical advection of momentum.
1039    
1040    checkpoint48a_post
1041    o In preparation for r*, use temp. array to compute vertical transport
1042       in flux-form momentum pkg. => change results of few test-exp.
1043      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1044                        lab_sea, natl_box & plume_on_slope
1045    
1046    checkpoint48
1047    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1048    
1049    checkpoint47j_post
1050    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1051    o moved adexch from forward_step to addummy_in_stepping
1052    o added exch in ctrl_map_...
1053    o aveFreq.=0. at end of cost_final to avoid overwrite in
1054      reverse checkpointing loop
1055    o Yet more changes in gmredi:
1056      * adgmredi_calc_tensor
1057        avoiding all recomputation of gmredi_slope_limit
1058      * adgmredi_x/y/rtransport
1059        added flag for excessive storing to avoid recomp. of
1060        u/v/rtans, dTdx/y/z
1061        -> this is not really necessary and very memory-consuming
1062      * adgmredi_slope_psi:
1063        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1064      * gmredi_slope_limit
1065        re-activated full calculation of taperfct for case 'ac02'
1066    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1067    
1068    checkpoint47i_post
1069    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1070    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1071      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1072    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1073    o gmredi: fix few bugs.
1074    
1075    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1076    This will be a good checkpoint to plug into the ecco-branch.
1077    o few modif.'s to get latest version adjointed
1078      (mainly kick out code in ini_linear_phisurf)
1079    o modif's to run adjoint with exactConserv
1080    o case GM_BOLUS_ADVEC should be cleaned
1081      S/R gmredi_slope_psi should be cleaned
1082    o verification/carbon now has exactConserv=.TRUE.
1083    
1084    checkpoint47g_post
1085    o time-average AIM output: becomes independent from statvars time-average
1086      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1087    o After TAF bug fix:
1088      Tested adjoint of gmredi package.
1089      Tests were done with checkpoint47 rather than with latest
1090      checkpoint47f_post since the latter is broken for the adjoint
1091      verification/carbon/ contains both ADM and TLM gradient checks.
1092    Here they are, before they get changed/lost/stolen.
1093    Mostly modif.'s to fix numerical sensitivities.
1094    Gradient checks OK for
1095    - GM_taper_scheme:
1096      * clipping
1097      * ac02
1098      * linear
1099      * glw91
1100      * dm95
1101      * ldd97
1102    - GMREDI_OPTIONS:
1103      * GM_VISBECK_VARIABLE_K
1104      * GM_NON_UNITY_DIAGONAL
1105      * GM_EXTRA_DIAGONAL
1106      * GM_BOLUS_ADVEC
1107    in conjunction with data.gmredi parameters to be checked in
1108    in a few minutes under verification/carbon/code/
1109    
1110    checkpoint47f_post
1111    Merging from release1_p10:
1112    o modifications for using pkg/exf with pkg/seaice
1113      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1114        and SEAICE_EXTERNAL_FLUXES
1115      - pkg/exf CPP options EXF_READ_EVAP and
1116        EXF_NO_BULK_COMPUTATIONS
1117      - usage examples are Experiments 8 and 9 in
1118        verification/lab_sea/README
1119      - verification/lab_sea default experiment now uses
1120        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1121    
1122    checkpoint47e_post
1123    o created a tag prior to creating a branch
1124    
1125    checkpoint47d_post
1126    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1127      at the bottom boundary had an erroneous half slip boundary condition
1128    o added bottom drag and no slip boundary condition capabilities to
1129      oceanic pressure coordinates code
1130    o added new verification experiment global_ocean_pressure, this experiment is
1131      also described in the tutorial section of the manual
1132    checkpoint47d_pre
1133    
1134    checkpoint47c_post
1135    o Added a verification experiment for a global cubed-sphere ocean run
1136      -  verification/global_ocean.cubed32x32x30
1137      -  uses pkg/therm_seaice and pkg/bulk_forcing
1138    
1139    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1140    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1141      when using P-coordinate; only implemented for atmospheric config.
1142    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1143      NOTES: requires option NONLIN_FRSURF to be "#define".
1144    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1145    
1146    checkpoint47b_post
1147    Merging from release1_p9:
1148    o pkg/seaice
1149      - removed GOTO's and added taf directives
1150      - double precision constants to reduce the g77 (Linux)
1151        to F77 (SGI) differences reported in release1_p8
1152    o tools/genmake
1153      - added SGI options
1154    o verification/testscript
1155      - updated to that of checkpoint47a_post
1156    o verification/global_ocean.90x40x15/input/eedata
1157      - modified for SGI f77 compatibility
1158    o verification/lab_sea
1159      - added description of sea-ice model
1160      - added missing matlab routines
1161      - added test of thermodynamics parallelization
1162    
1163    checkpoint47a_post
1164    o new pkg: aim_v23
1165     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1166       for now, keep the same surface forcing as before.
1167     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1168     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1169     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1170    o add diagnostic of surface correction term in monitor output
1171    
1172    o bulk_force and therm_seaice
1173    - Two packages:  bulk_force (Bulk forcing)
1174      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1175    - Earlier integration from Stephaine Dutkiewicz
1176      and Patrick Heimbach.
1177    - Two ifdef statements for compile time,
1178       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1179    
1180    checkpoint47
1181    differentiable version of checkpoint46n_post
1182    o bug fix in quasihydrostaticterms
1183    o * "clean" adjoint code (in terms of extensive recomputations)
1184        can now be obtained for all GMREDI options (i.e. for
1185        - GM_VISBECK_VARIABLE_K
1186        - GM_NON_UNITY_DIAGONAL
1187        - GM_EXTRA_DIAGONAL
1188        - GM_BOLUS_ADVEC )
1189      * However, wrong gradient check problem remains unsolved.
1190      * New CPP options have been introduced for different
1191        tapering schemes
1192    o external_fields_load now part of differentiation list
1193    o pressure needs multiple storing;
1194      would be nice to have store_pressure at beginning or
1195      end of forward_step, e.g. by having phiHyd global (5-dim.)
1196      (NB: pressure is needed for certain cases in find_rho,
1197      which is also invoked through convective_adjustment).
1198    o recomputations in find_rho for cases
1199     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1200    o #define ATMOSPHERIC_LOADING should be differentiable
1201    o ini_forcing shifted to begining of initialise_varia
1202    o Incorporating QNVS line search routines into MITgcm
1203      (this is separate code, and therefore not under pkg)
1204      lsopt/, optim/
1205    o Updated verification/carbon/
1206      - #define GM_VISBECK_VARIABLE_K
1207      - GM_taper_scheme    = 'ldd97'    
1208    
1209    checkpoint46n_post
1210    Merging from release1_p8:
1211    o verification/natl_box:
1212      updating new external_fields_load routine
1213    o New package: pkg/seaice
1214      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1215      The sea-ice code is based on Hibler (1979-1980).
1216      Two sea-ice dynamic solvers, ADI and LSR, are included.
1217      In addition to computing prognostic sea-ice variables and diagnosing
1218      the forcing/external data fields that drive the ocean model,
1219      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1220      The implied surface heat flux is then stored in variable
1221      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1222      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1223      non-local transport term.  Because this call precedes model
1224      thermodynamics, temperature under sea-ice may not be "exactly" at
1225      the freezing point by the time theta is dumped or time-averaged.
1226      N.B.: fairly large differences in accuracy occur across
1227            different platforms/compilers; comparison between
1228            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1229            generated output gives:
1230       T           S           U           V
1231      C D M    c        m  s        m  s        m  s        m  s
1232      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1233      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1234      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1235    
1236      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1237    o GAD:
1238      - generated new common blocks to account for call of
1239        same gad routines with differing traceridentities
1240        (needed to modify tracerIdentity indices in GAD.h)
1241      - generated separate common blocks for case useCubedSphereExchange
1242        (Department of Futurology)
1243      - parameter lists to gmredi_?transport: added tracerIdentity
1244      - added new key indices to tamc.h
1245    o external_fields_load:
1246      - added this routine to TAF list
1247      - needed to make some common blocks global and additional storing
1248        along the same lines as exf package (checkpoint_lev?_directives.h)
1249    o exf:
1250      updated external forcing package
1251      - bug fixes carried over from ecco-branch
1252        (missing OBCS_OPTIONS.h in two routines)
1253      - enable easy to use "no forcing".
1254      - added exf I/O for atmospheric loading
1255      - added exf I/O for runoff data
1256      - transfered scaling between exf <-> MITgcm to exf namelist
1257    o Adding new verification experiment global_with_exf.
1258      This verification experiment is almost identical to the
1259      global_ocean.90x40x15 experiment, except that it uses
1260      the exf (and cal) package instead of the
1261      external_fields_load routine (cf README file).
1262    
1263    checkpoint46m_post
1264    o modified testscript to return -- when there are no lines of "%MON" output
1265    o added new flag "quasiHydrostatic" for QH mode
1266      and new routine quasihydrostaticterms()
1267    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1268      New routine: mom_u_coriolis_nh()
1269    o fixed sign of non-hydrostatic metric terms in u and v equations.
1270      Depend on correct sign of gravitySign.
1271    o added work.pc* to .cvsignore in aim directories using ifc
1272    o introduced flag for controllin non-hydrostatic metric terms
1273    o removed gravitySign from PARM04
1274    o switched to g77/ifc from pgf77 in aim experiments
1275    
1276    checkpoint46l_post
1277    o made convective adjustment work with pressure coordinates:
1278     - changed the direction of k-loop in convective_adjustment.F for the
1279       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1280     - adjusted the reference pressure k-index in convective_adjustment.F
1281     - adjusted the convection condition in convect.F (in analogy to
1282       calc_ivdc.F)
1283     - convective_adjustment no longer computes anything on the halos
1284     - removed the warnings about negative salinity from find_rho.F and
1285       find_alpha.F; instead the new routine look_for_neg_salinity, called
1286       at the beginning of find_rho, find_alpha, and find_beta, does a
1287       check of the entire slice, if CPP-option
1288       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1289    checkpoint46l_pre
1290    
1291    checkpoint46k_post
1292    o fixed the verification/global_ocean.90x40x15 experiment:
1293     - new bathymetry (the world according to A., JMC, and M.)
1294     - new initial fields and forcing fields (*.bin files)
1295     - new POLY3.COEFFS (for the next release one should switch to a full
1296       equation of state: JMD95P or MDJWF)
1297     - fixed several errors and redundancies in the data file
1298     - experiment uses looped cells
1299     - added matlab directory with diagnostic scripts for plotting of output
1300    
1301    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1302     - read AIM physics parameters from a file (data.aimphys)
1303     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1304    
1305    checkpoint46j_post
1306    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1307    o move wVel computation at the end of the time step, in S/R integr_continuity
1308    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1309    o update timeave pkg for wVel diagnostic.
1310    checkpoint46j_pre
1311    
1312    checkpoint46i_post
1313    o Clean up AIM package (and keep the results unchanged):
1314      include CPP_OPTION and use IMPLICT NONE in all routines ;
1315      declare all the variables _RL ; use _d 0 for all numerical constants.
1316      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1317    
1318    checkpoint46h_post
1319    o cleaned up the use of rhoNil and rhoConst.
1320      - rhoNil should only appear in the LINEAR equation of state, everywhere
1321        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1322        and the dynamical equations are all divided by rhoConst
1323    o introduced new parameter rhoConstFresh, a reference density of fresh
1324      water, to remove the fresh water flux's dependence on rhoNil. The default
1325      value is 999.8 kg/m^3
1326    o cleanup up external_forcing.F and external_forcing_surf.F
1327      - can now be used by both OCEANIC and OCEANICP
1328    checkpoint46h_pre
1329    
1330     Added code to convert surface volume flux (fresh water) into
1331     a mass flux when using P coordinates in the ocean (OCEANICP).
1332     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1333    
1334    checkpoint46g_post
1335    o Include a new diagnostic variable phiHydLow for the ocean model
1336      - in z-coordinates, it is the bottom pressure anomaly
1337      - in p-coordinates, it is the sea surface elevation
1338      - in both cases, these variable have global drift, reflecting the mass
1339        drift in z-coordinates and the volume drift in p-coordinates
1340      - included time averaging for phiHydLow, be aware of the drift!
1341    o depth-dependent computation of Bo_surf for pressure coordinates
1342      in the ocean (buoyancyRelation='OCEANICP')
1343      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1344        Theta, Salinity, and Pressure in the parameter list. This routine is
1345        presently contained in find_rho.F. This routine does not give the
1346        correct density for 'POLY3', which would be a z-dependent reference
1347        density.
1348    o cleaned up find_rho
1349      - removed obsolete 'eqn' from the parameter list.
1350    o added two new verification experiments: gop and goz
1351      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1352    checkpoint46g_pre
1353    
1354    checkpoint46f_post
1355    o Enable tangent linear (forward mode) gradient checks:
1356      - extended active file handling to g_... files
1357      - added TANGENT_SIMULATION to theSimulationMode
1358      - extended grdchk package accordingly
1359    o added tangent linear setup in verification/carbon/code_ftl
1360    o added adjoint setup in verification/front_relax/code_ad
1361    
1362    checkpoint46e_post
1363    o Added new equation of state -> MDJWF
1364      - EOS of McDougall et al., 2002, JAOT, submitted
1365      - caveat: the equation of state is only valid for a smaller (more
1366        realistic?) range of values than JMD95P/Z and UNESCO
1367      - added masks to the calculation of pressure in store_pressure
1368      - added more check values for density in check_eos (ini_eos.F), some of
1369        the old check values are out of the range of the MDJWF-eos, so don't
1370        expect perfect matches for those
1371    checkpoint46e_pre
1372    
1373    checkpoint46d_post
1374    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1375      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1376      case of pressure coordinates. eosType='JMD95Z' in
1377      combination with buoyancyRelation='OCEANICP' now causes an error.
1378    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1379      in find_alpha/beta.
1380    checkpoint46d_pre
1381    
1382    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1383      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1384    
1385    checkpoint46c_post
1386    o Changes necessary for ocean in p-coordinates
1387     -  Added new buoyancy relation = 'OCEANICP'
1388     -  Added new parameters = gravitySign (this used to be contained inside
1389        the factor dRdZ which I added when we first switched to R coordinates).
1390     X GM/Redi is not compatible (yet)
1391     X bottom drag and no-slip need to be debugged.
1392    checkpoint46c_pre
1393    
1394    checkpoint46b_post
1395    o Added new equation of state -> JMD95Z and JMD95P
1396      - EOS of Jackett and McDougall, 1995, JAOT
1397      - moved all EOS parameters into EOS.h
1398      - new routines ini_eos.F, store_pressure.F
1399    o Added UNESCO EOS, but not recommended because it requires
1400      in-situ temperature (see JMD95)
1401    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1402      unesco.f to be used with POLY3
1403    checkpoint46b_pre
1404    
1405    checkpoint46a_post
1406    o Added (atmospheric) pressure loading
1407      - new field in FFIELDS.h, etc...
1408      - new cpp flag ATMOSPHERIC_LOADING
1409    o Changed hFacC to _hFacC in calc_phi_hyd.F
1410    o Added SHORTWAVE_HEATING to some files for consistency
1411    checkpoint46a_pre
1412    
1413    checkpoint46
1414    further merges from release1_p5
1415    o new ctrl package
1416      - adopted from ECCO environment to enable optimization
1417      - added Eliassen Palm fluxes to controls
1418    o added Eliassen Palm flux controls to gradient check package
1419    o cost package
1420      - Compatible with new ctrl package
1421      - added Eliassen Palm cost hooks
1422      - modif's of existing cost functions
1423    o Adjoint-related bug fixes in kpp:
1424      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1425      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1426    o autodiff package
1427      - flow directives:
1428        + new for S/R do_the_model_io
1429        + enhanced for S/R checkpoint
1430        + new gmredi.flow
1431      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1432        disable adcommon.h/g_common.h by default.
1433      - fixed problem for adjoint of global_max
1434    o modified verification/carbon/
1435    o New setup for adjoint of global_ocean
1436    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1437    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1438    o incorporated hooks for sponge layer code (external_forcing.F)
1439    
1440    checkpoint45d_post
1441    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1442    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1443      (affects plume_on_slope "cg2d" output)
1444    o add new parameter deltaTfreesurf for free-surface time stepping
1445    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1446    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1447    o change phiMin in exp1 (to agree with documentation)
1448    o add new flags:
1449     - T,S forcing inside/outside Adams-Bashforth
1450     - turn off temp,salt advection and/or forcing
1451     - for each tracer, define internal flag for multiDimAdvection & A-B
1452    o monitor: change definition of KE to check conservation of Energy
1453    
1454    checkpoint45c_post
1455    o Removed f90 comments ("!")
1456    o Modified initialisations to enable exf package for MITgcm
1457      (without invoking ECCO_PACKAGE).
1458    o modifications to gradient check package (Martin Losch)
1459      - enable centered differences
1460      - modified format of standard output
1461    
1462    checkpoint45b_post
1463    o cleaned exchange calls in cg2d
1464    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1465    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1466      to configure barotropic setup (Martin Losch)
1467    o moved some initialisations within bi,bj loop in dynamics
1468      (TAF flow dependency)
1469    o in initialise_varia, moved call packages_init_variables
1470      before convective_adjustment_init
1471      (corresponding adjustment of TAF tape initialisation).
1472    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1473    
1474    checkpoint45a_post
1475    o compute Rho over the whole domain (extend iMin,jMin indices)
1476    o specific exchange for X-slice domain (case Ny=1)
1477    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1478    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1479    
1480    checkpoint44h_post = checkpoint45
1481    o Fix to restore differentiability:
1482      place at which packages_init_variables is called in
1483      initialise_varia is crucial for reverse control flow.
1484    o modifications in GMRedi to enable stable adjoint
1485      (corresponding modif's in thermodynamics, dynamics)
1486    o added missing hook for sponge layer code in external_forcing
1487    o modified test cost functions
1488    o storing in gad_advection (plus removal of write(0,*)!
1489    o missing headers TR1.h added in convective_adjustment routines
1490    o errorMessageUnit set non-equal zero in eeboot
1491      (conflict on some platforms, e.g. IBM SP3)
1492    o modified carbon verif.
1493    
1494    checkpoint44h_pre
1495    o vertical grid option: allow to put the Interface at the middle between
1496      2 cell-centers ; replace delZ in pkg/kpp by drF.
1497    o GM Advective form: Tracers are advected using the residual transport (=
1498      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1499    
1500    checkpoint44g_post
1501    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1502      results) ; ifdef missing in thermodynamics.F
1503    
1504    checkpoint44f_pre,checkpoint44f_post
1505    o added PTRACERS package
1506      This allows an arbitrary number of passive tracers to be integrated
1507      forward simultaneously with the dynamicaly model.
1508      + Implemented so far:
1509        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1510        - I/O and checkpointing
1511        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1512      + Not implemented so far:
1513        - KPP
1514        - OBCS
1515      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1516        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1517        line in data.pkg.
1518      + This package is disabled by default since it increases storage.
1519    
1520    
1521    o testscript: added -cleanup option
1522    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1523                 b) enable to filter 2D fields.
1524    
1525    checkpoint44e_pre,post
1526    o re-wrote convective adjustment to use pre-calculated weights
1527      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1528      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1529      Original calls to convect() still in place.
1530    
1531    chkpt44d_pre,post
1532    o added missing EXCLUDE_MONITOR flags
1533    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1534      (incompatible typ in MIN/MAX expressions caused problems
1535      on IBM SP3)
1536    o in genmake added variable MAKEDEPEND
1537      plus resetting for case SunOS
1538    o added timer_stats.c routine for IBM SP3
1539    o removed variables in dynamics
1540    !!! I forgot to create tag chkpt44d_pre !!!
1541    !!! But chkpt44d_pre = chkpt44c_post    !!!
1542    
1543    o real fresh water flux implemented with non-linear free-surface.
1544    
1545    chkpt44c_pre,post
1546    o few fix (mask in shap_s2, EmPmR in external_field_load,
1547      USE_NATURAL_BCS in solve_for_P);
1548    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1549    
1550    checkpoint44b_pre/_post
1551    o merge of relevant stuff from the ecco-branch:
1552      - genmake: removed $S64 overwrite for case SunOS
1553      - pkg/exf: update and corrections for field swapping and obcs
1554      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1555                  harmonized between ECCO and MITgcm
1556      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1557                      updated checkpointing_lev... lists for obcs
1558      - model/src: minor changes in forward_step, plot_field
1559                   added directive for divided adjoint in the_main_loop
1560      - pkg/mdsio: added mdsio_gl_slice
1561    
1562    o check parameters & config (chkpt44a_pre,post)
1563    o OBC and NonLin_FrSurf.
1564    
1565    checkpoint44
1566    o fix bug in mom_vi_del2uv
1567    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1568    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1569    o update AIM experiments (NCEP input files)
1570    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1571    o added some stuff for AD
1572    
1573    checkpoint43
1574    o added two new advection tests
1575    o added global 4x4 degree ocean test
1576    o added test of H&S94 with free surface on cube
1577    o some final mods for gradient check, adjoint,...
1578    
1579    checkpoint42
1580      Fixed AD-related problems:
1581    o Store directives up-to-date with re-arranged Adams-Bashforth
1582      (mainly thermodynamics.F)
1583    o New store directives for multi-dim. advection schemes
1584      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1585      * new common block and key passkey
1586      (mainly gad_advection.F)
1587    o Modified store directives for split of dynamics/thermodynamics
1588      for the case ALLOW_KPP
1589    o Cleaned argument list for timestep_tracer.F
1590    
1591    checkpoint41
1592    o re-formatted/added comments in prologues of key subroutines
1593      to work with protex
1594    
1595    checkpoint40
1596    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1597    o added FLT (floats) package from Arne along with demo. experiment
1598    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1599      implementation of forward-in-time forcing terms
1600    o more mods for non-linear free-surface including new variable
1601    o modified multi-dim method to work on cube
1602    o bug fix in KPP (from DM)
1603    
1604    checkpoint40pre9
1605    o added DST advection schemes
1606    o fix MPI bug on SGI's
1607    o modifications for non-linear free-surface
1608    o fixed conditionals for fixed flow/passive tracer only mode
1609    o added tension/strain form of stress tensor
1610    o changes to commenting of arguments for TAF/TAMC
1611    o added/updated many matlab scripts
1612    o added multi-dimensional advection method for tracers
1613      
1614    checkpoint40pre8
1615    o new package rw/
1616      Added method for dumping intermediate local arrays:
1617      mdsio_writetile - same as mdsio_writefield except works from inside
1618                        bi,bj loop
1619      mdsio_writelocal - same as mdsio_writetile except works for local
1620                         arrays
1621      write_local_r? - higher-level wrapper for mdsio_writelocal
1622      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1623      Example given at end of mom_vecinv.F that dumps some local arrays.
1624    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1625      control flux-form versus vector invariant code.
1626      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1627      or genmake -DISABLE ...
1628    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1629      (additional storing is now needed for case vecinv;
1630      currently nothing implemented to switch this storing off
1631      in case fluxform is used since no CPP flag available).
1632    
1633    checkpoint40pre7
1634    o bug fix in dynamics.F
1635      calc_viscosity called before k=1,Nr loop.
1636    o added some #ifdef's ALLOW_PASSIVE_TRACER
1637    o cleaned initialisations in ctrl_map_ini
1638      related to TAF
1639    
1640    checkpoint40pre6
1641    o split dynamics into thermodynamics & dynamics
1642    o corresponding split of calc_diffusivity into
1643      calc_diffusivity, calc_viscosity
1644      (kpp_calc_diff, kpp_calc_visc).
1645    o Added diffkr, kapgm to control variables
1646    o bug fix in gmredi_slope_limit for ldd97
1647    
1648    checkpoint40pre5
1649    o proper initialization of Adams-Bashforth time stepping
1650      + uses forward step for very first step of model (iter=0)
1651    o re-generated *all* output since almost all output is modified by this
1652      change (sorry but we've been putting this one off for about 2 years)
1653      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1654        *not* regenerated since they are already out of date and I don't
1655        want to create the impression that they are suddenly working.
1656    o removed KAP stuff for DEC's
1657    o modified/added many .cvsignore files in */code and */input
1658    o added new expt "solid-body.cs-32x32x1"
1659      + this uses an alternative form of ini_curvilinear_grid.F which
1660        is not necessarily any better than the current one...
1661    
1662    checkpoint40pre4
1663    o added re-initialisations of utrans,vtrans,rtrans in
1664      calc_common_factors which are crucial for TAF.
1665    o extended iMin,jMin range for calc_common_factors,
1666      calc_diffusivity
1667    o added option ALLOW_PASSIVE_TRACER
1668    o a few minor updates and fixes
1669    
1670    checkpoint40pre3
1671    o created calc_gtr1.F for gad package
1672    o split the_main_loop and re-introduced forward_step
1673    o some recomputations of nIter0 for TAMC
1674    
1675  checkpoint40pre2  checkpoint40pre2
1676  o Updated to latest branch of AJA, JMC  o Updated to latest branch of AJA, JMC
1677  o Added gradient check package  o Added gradient check package

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