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revision 1.38 by heimbach, Tue Apr 10 22:35:24 2001 UTC revision 1.420 by edhill, Sat Dec 18 02:18:59 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 more CF compliance: convert all MNC 'iter' variables to 'T' so that it
7      becomes the coordinate variable for the 'T' dimension
8    o add CF-style coordinate variables to MNC
9      - just a first cut:  numbers are meaningless on the cubesphere and
10        missing along the T axis but otherwise it works!
11    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
12    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
13    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
14      this is based directly on what the model compute, so that the content of
15      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
16    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
17    o clean up build options files for SunOS, in particular
18      - remove -traditional from xmakedepend
19      - change -xarch=v9 to -xarch=native for f77
20      - restore use of make (not gmake)
21      - add CC=gcc if using g77
22    o changes per discussion of AM, JMC, & EH3 today:
23      - move redundant "grid" variables out of "state" -- in preparation of
24        creating proper CF-style coordinate variables and in recognition
25        that any/all grid variables can be easily copied (eg. w/NCO) from
26        the grid files into any of the other NetCDF files
27      - *always* output grid variables with MDSIO (this will eventually be
28        changed)
29      - output MNC grid file if useMNC is true
30    o every instance of _END_MASTER() has been found and replaced with
31      _END_MASTER( myThid ) in order to satisfy certain picky Sun
32      preprocessors
33    o re-arrange diagnostics pkg initialisation:
34     - allow each package to extend the available diagnostics list
35     - add some checking and fix small problems (multi-threaded, ...)
36     - new S/R diagnostics_fill (replace fill_diagnostics):
37       look through the short list of active diag. (instead of the long list)
38       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
39    
40    checkpoint57a_post
41    o this set of changes restores TAMC compatibility
42      tested for global_ocean.90x40x15 adjoint on trough
43      (what a pain)
44    
45    checkpoint57a_pre
46    o some modifs in tools/build_options for sunos
47    o call ctrl_pack for ctrl at end for optimcycle=0
48    
49    checkpoint57
50    o add horizontal bi-harmonic viscosity for vertical velocity
51      - new parameter viscA4W (defaults to viscA4)
52      - affects only non-hydrostatic code
53      - to be done: no-slip lateral boundary conditions
54    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
55    o implement Implicit Vertical advection for pTracers
56    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
57      (implemented also for implicit vertical diffusion & advection)
58    o OBCS: extend application of tracer open boundary conditions
59      to a strip beyond the boundary of width Olx/Oly
60    o add call monitor to TAF set of required calls (flow directives)
61      and include in natl_box_adjoint
62    o untangle a few ifdefs related to cost, ctrl, autodiff
63      untangel a few ALLOW_ECCO_OPTIMIZATION
64    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
65      (theta2, salt2 in ecco_cost_weights)
66    
67    checkpoint56c_post
68    o OBCS as control variables
69      - update ctrl_ad_diff.list, obcs_ad_diff.list
70      - remove balance of obcs controls from default
71      - fix index bug nobcs in ctrl_init
72      - fix dummy fields filen in ctrl_pack
73      - add dummy weights for obcs
74    o lsopt: comment out fort.94 output
75    o optim:
76      - remove unnecessary header files
77      - adjusted namelists
78      - add xerbla.F to Makefile
79    o exf:
80      - multiple modifications of exf_check_range
81      - unit change in exf_init_runoff from [m/year] to [m/s]
82    o mdsio:
83      - i/o-vector change debugLevel from debLevA to debLevB
84    
85    checkpoint56b_post
86    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
87      is called from DO_THE_MODEL_IO
88      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
89      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
90      - clean up PTRACERS_WRITE_TIMEAVE a little
91    o add another verification experiment that tests both the cfc-pkg and
92      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
93      reactive tendencies treated inline with regular timestepping
94    o testreport previously did a lousy job of comparing small numbers, so
95      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
96      implemented in the little c-progam tmp_cmpnum.c which is embedded in
97      testreport.
98    o ptracers_monitor: bug fix for MPI
99    
100    checkpoint56a_post
101    o GCHEM: finish reorganizating the package
102      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
103        (introduces another 3D-array for each passive tracer, but only if
104        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
105        gchemTendency is not needed because the timestep is done separately)
106      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
107      - GCHEM is now---more or less cleanly---separate from PTRACERS
108      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
109        so clear to me how that should be done in a general way.
110    o CFC: improve formatting of output in CFC_ATMOS
111    o PTRACERS:
112      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
113        that ALL experiments with ptracers enable can be checked. This makes
114        GCHEM_MONITOR obsolete.
115      - include a runtime parameter PTRACERS_monitorFreq that defaults to
116        monitorFreq
117      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
118    o add PTRACERS (PTR0[1-5]) to testreport output
119    o exf_check_range:
120      * default changed to .TRUE.
121      * will check values for niter0 if debLevA, every timestep if debLevB
122      * STOP in exf_check_range if 'out of range'
123      * range chosen generous to allow for potential extema
124      TBD: a version with stricter range
125           permitted range would be runtime parameters
126    o GMredi:
127      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
128      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
129      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
130    o GCHEM:
131      - move call to GCHEM_FORCING_SEP, so that it is now called before
132        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
133      - introduced a useGCHEM runtime flag and applied it everywhere.
134      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
135        this flag is now only visible within GCHEM-pkg routines.
136      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
137        be replaced by a 3D array that is computed before thermodynamics; for
138        this, the tracer ID iTracer had to be included into the parameter list
139        of ptracers_forcing
140      - set up forward_step to call gchem_forcing, that will replace
141        gchem_forcing_int in ptracers_forcing
142      - cleaning up
143    o small cleaning of exch2: remove files that are also in eesupp/src
144    
145    checkpoint56
146    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
147    o mnc: cleanup "full" files--fixes out-of-memory problem
148    o ECCO-GODAE
149      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
150      * fully merged and updated from SIO code
151        windstress sign change affects
152        - exf_inscal_[u/v]stress
153        - sign of xx_tau[u/v] adjustments
154        - signs in cost_scat
155      * ctrl_get_gen: avoid update of tau[u/v] for first few days
156      * natl_box_adjoint updated and compressed
157      * 2-level checkpoint switch added
158        (tested in EXP. 1 of natl_box_adjoint)
159      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
160    o SVD
161      * first complete, non-hacked version for SVD calculations
162      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
163        performed via direct access files admtlm_vector.it????
164        (via ctrl_[un]pack)
165      * optimcycle is used for ARPACK iteration counter
166        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
167      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
168        and add linear transforms where necessary
169      * controls are initial/final SST, SSS (can be extended; need to check
170        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
171    o mdsio: filename info to both stderr, stdout
172    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
173      from sign change
174    
175    checkpoint55j_post
176    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
177      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
178    o add consistent build directories and .cvsignore files to verification
179    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
180    o make all subroutines 30 or less characters in length for certain older
181      compilers to work (a thorough search only turns up two routines in
182      pkg/ptracers)
183    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
184      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
185    
186    checkpoint55i_post
187    o change arrays for total vertical diffusivity (2.D if explicit,
188      3.D if implicit) ; each ptracer uses its own background value.
189    o added mnc/NetCDF output capability to ocn_compon_interf
190      - added bits to verification/cpl_aim+ocn so that it can run on
191        ITRDA and other clusters without the mpirun "-wd" option
192    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
193      configuration
194    o give MNC the ability to create additional files rather than
195      exceeding a specified file size limit "MNC_MAX_FILESIZE"
196      - the default is just less than 2GB which is a practical limit
197        on many systems
198    o Compute the non-local term using either KPP vertical diffusivity (=default)
199       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
200    
201    checkpoint55h_post
202    o add verification test "vermix"
203    o remove all the *_ioinc flags and replace with the single global
204      outputTypesInclusive flag
205    o allow to set a vertical profile of vertical diffusivity for T & S
206    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
207    o useMNC moved from data.mnc to data.pkg
208    
209    checkpoint55g_post
210    o Renaming carbon AD experiments to comply with testreport conventions
211    o Updating adjoint of Held-Suarez hs94.1x64x5
212    o Fixing directives for non-ECCO forward_step, after ECCO directives
213      have been fixed to avoid recomp. of do_oceanic_phys
214      Works well for global_ocean.90x40x15,
215      but recomp. issue remains for carbon
216    o Updating adjoint output for natl_box_adjoint after
217      pkg/ecco has been modified (see taga c55d_post)
218    
219    checkpoint55f_post
220    o rename to timeave_init_fixed
221    
222    checkpoint55e_post
223    o some delicate re-shuffle of store directives to avoid one
224      extra call of do_oceanic_physics
225      affects ecco_the_main_loop.F, do_oceanic_physics.F
226      checkpoint_lev1_directives.h
227    o NB: this may break global_ocean adjoint temporarily,
228      but it is clear how to fix it. Will do later, need this now.
229    
230    checkpoint55d_post
231    o ECCO specific cost function terms (up-to-date with 1x1 runs)
232    o ecco_cost_weights is modified to 1x1 runs
233    o modifs to allow observations to be read in as
234      single file or yearly files
235    o enable to read exf forcing fields as either
236      single file or yearly files (flag useExfYearlyFields)
237    checkpoint55d_pre
238    
239    o switch between 2-level and 3-level checkpointing
240    o add ability of MNC to write local and "partial" (eg. 2D slices where
241      the full 3D field is never actually stored) arrays to NetCDF files
242      with the correct (that is, the complete multi-dimensional) set of
243      array indicies
244      - used in mom_vecinv() to write the diagFreq output
245      - tested (demonstrated) in verification/aim.5l_cs
246    o further mnc-ification
247      - add verification/lab_sea to the list with mnc setups
248      - fix undefined mnc v-names in cd_code
249      - add kpp to mnc output (both snapshot and timeave)
250    o non-hydrostatic code
251      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
252        in calc_gw.F
253      - defaults to viscAh
254      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
255        friction or Leith) in non-hydrostatic mode, as long as there is
256        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
257    o pkg/cost
258      extend simple cost functions to treat time mean quantities
259      (T,U,V) via cost_accumulate_state from cost_tile
260    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
261        be 2 times larger than the minimum size the advection scheme requires.
262        now get a perfect conservation of salt in advect_cs test-exp (updated)
263    o GGL90 (Gaspar's TKE mixed layer)
264      - add horizontal diffusion of TKE, requires exchanges in
265        do_fields_blocking_exchanges, horizontal diffusivity is zero by
266        default. In OPA there is no horizontal diffusion of TKE but the
267        mixing coefficients are computed from a horizontal average of TKE of
268        6 points or so. I think that diffusion has a little more physical
269        justification.
270      - clean up ggl90_calc in the hope of reducing memory usage (this hope
271        was in vain)
272      - mask tke-variable in ggl90_init
273    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
274    o fix biharmonic diffusion on CS-grid.
275    o more obcs stuff
276      - added obcs_external_fields_load as an alternative to the EXF-pkg option
277        for reading boundary values. This routine is called from
278        obcs_prescribe_read
279      - updated obcs_check
280      - changed sponge layer relaxation parameter units for days to seconds
281      - turned off sponge layer by default
282      - changed argument list of OBCS_CALC to myTime+deltaTclock
283      - fixed about 35 bugs in obcs_external_fields_load
284    
285    checkpoint55c_post
286    o obcs stuff
287      - new runtime flags useOBCSprescribe, useOBCSbalance
288      - re-arranged obcs_calc
289      - moved exf_getobcs to obcs_prescibe_read
290        obcs_prescibe_read is called after ORLANSKI stuff
291        and independent of it (executable can contain all).
292      - updated obcs_check
293      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
294        These may be necessary only if tangential velocities are
295        prescribed at OB, not sure, needs testing.
296    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
297      which simplifies the calls and passes the ifc check-bounds test
298    
299    checkpoint55b_post
300    o add a 2D scalar, Z location, exchange_2 routine.
301    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
302      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
303      affects advect_cs results (for the wrong reason): update output.txt
304    o use a more standard discretization for biharmonic viscosity ;
305     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
306      affects results of dome set-up: update output.txt
307    o fix gad_advection.F (CubedSphere part), back to version 1.23
308    o fix bug in mom_vi_del2uv.F (CubedSphere part).
309    
310    checkpoint55a_post
311    o merged code to
312      * prescribe/read time-dependent open boundaries
313        (works in conjunction with exf, cal)
314      * sponge layer code for open boundaries
315      * each boundary N/S/E/W now has its own CPP option
316        (healthy for the adjoint)
317    
318    checkpoint55
319    o up-to-date adjoint of previous breaks
320      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
321      - global_ocean_ebm: adjoint still needs fix (TLM ok)
322      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
323      - carbon: * remove tr1-related adjoint verification
324                * add ptracer as control variable
325    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
326      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
327    
328    checkpoint54f_post
329    o in verification/carbin/ remove experiment related to
330      ALLOW_PASSIVE_TRACER (array tr1 etc)
331      code_ad/ input_ad/ results_ad
332    
333    o add two new packages
334      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
335        + subject to optimization (memory)
336      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
337        + subject to reordering (many GOTOs in the original code)
338        + so far opps is called for every (i,j) point, and then operates in
339          the vertical; one may want to reorder the scheme in order operate in
340          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
341          fields)
342    o overhaul of IO so that we now have flags for MDSIO and/or MNC
343      - all verification tests compile and run with linux_ia32_g77
344      - defaults are compatible with current input files--nothing
345        should change if you were not previously using MNC
346      - MNC output has been added in numerous places (eg. timeave)
347        but there are still a few writes not yet do-able with MNC
348        (this is in progress)
349      - flags now allow for either/or/both use of MDSIO and MNC and
350        documentation will soon follow
351      - numerous small formatting cleanups for ProTeX
352    o add version info (via BUILD_INFO.h) to MNC and stdout
353    
354    checkpoint54e_post
355    o add two new packages
356      - pp81 (Packanowski and Philander, 1981), Richardson number and
357        stratification dependent mixing
358      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
359      - these scheme operate in a similar manner as KPP (without ghat, of
360        course), however there is only one diffusivity that is used for both
361        temperature and salinity (and passive tracers)ç
362    o add offline package
363    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
364      provided by Stephanie Dutkiewicz
365    o genmake2: add ability to search for C compilers and cleanup test output
366      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
367    
368    checkpoint54d_post
369    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
370    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
371      leading to additional shift by 5 days each year of integration
372       (i.e. leading to considerable offset over the years)
373    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
374    o start with no AB and no initial filtering (staggerTimeStep):
375      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
376    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
377      (external loading & cpl import/export stay in forward_step.F)
378    o update coupling interface to work with new staggerTimeStep
379    o change MDSIO ptracers_pickup.
380    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
381    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
382    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
383    
384    checkpoint54c_post
385    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
386      this affects (truncation error) output.txt of test-exp:
387       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
388    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
389    o change Qnet to always be the net heat flux, (+upward).
390      affects (truncation error) output of natl_box exp.: updated
391    o define the max number of passive tracers in PTRACERS_SIZE.h
392    o start to test mnc routinely in exp0
393    o add sea-ice loading (sIceLoad) as a new forcing field.
394    
395    checkpoint54b_post
396    o add testreport "-j JOBS" option for parallel builds (tested and pretty
397       impressive on Altix and Opteron systems)
398    o diagnostics can now write NetCDF files through the mnc package
399    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
400    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
401    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
402      affects (truncation error) output of lab_sea & natl_box exp.: updated
403    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
404    
405    checkpoint54a_post
406    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
407    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
408    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
409    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
410      + internal_wave (shift in writing cg2d_ini_res)
411    checkpoint54a_pre
412    
413    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
414      - modified verification/lab_sea and natl_box_adjoint accordingly
415    
416    checkpoint54
417    checkpoint53g_post
418    o prepare splitting of thermodynamics: store convect.counter in common block
419    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
420      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
421    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
422    o new parameter "nShapS": allow to treat differently S from T (nShapT)
423    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
424    o restore adjointability
425    
426    checkpoint53f_post
427    o modifications that affect AIM experiment results (update output.txt):
428      - no advection of S at top interface Nr (pkg/generic_advdiff)
429      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
430    o AIM pkg:
431      - include stability function into surf.Flux derivative relative to Tsurf
432      - calculate clear-sky radiation & surface temp. change (for diagnostics)
433    
434    checkpoint53e_post
435    o merged cylindrical coord configuration
436    o added rotating_tank experiment
437    checkpoint53e_pre
438    
439    checkpoint53d_post
440    o faulks upgraded: re-generate output.txt that have changed:
441       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
442    o Added Bryan and Lewis, 1979, vertical diffusivity profile
443    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
444    o added Sadourny discretization of Coriolis
445      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
446      - re-enabled use of omega3 (useAbsVorticity)
447    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
448      vector-invariant equations
449      - note: does *NOT* yet use same variable visc. for no-slip BC's.
450    o recoded the lateral boundary conditions for non-hydrostatic w, this time
451      hopefully without new bugs
452      - still to do: biharmonic friction for non-hydrostatic w
453    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
454    o regenerated output for global_ocean_ebm (using -ieee)
455    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
456      of mom_common/
457      - simple re-arrangement of instructions within computing loop
458    checkpoint53d_pre
459    
460    checkpoint53c_post
461    o new version of coupler for AIM+thSIce and Ocean models
462     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
463     - land: change Evaporation of snow
464     - aim with thSIce: fix bug in snow-precip.
465    o changes to calc_gw.F
466     - bug fix for w^2 term near the bottom boundary
467     - (hopefully) improve the lateral slip boundary condtions for use with
468        partial/looped cells
469      - because the bug fix changes two verification experiments anyway (exp5
470        and plume on slope), change the lateral boundary condition from half slip
471        to the value of no_slip_sides
472    o ebm package wasnt quite up to the parallel task. Fixed that.
473    o Adjoint of EBM package + verification
474      * TLM OK
475      * ADM not sufficient accuracy yet (needs further testing)
476    
477    checkpoint53b_post
478    o Commiting new energy balance model to repository
479      * package is pkg/ebm
480      * verif. is verification/global_ocean_ebm
481      * references are in ebm_driver.F
482    C      * X. Wang, P. Stone and J. Marotzke, 1999:
483    C        Global thermohaline circulation. Part I:
484    C        Sensitivity to atmospheric moisture transport.
485    C        J. Climate 12(1), 71-82
486    C      * X. Wang, P. Stone and J. Marotzke, 1999:
487    C        Global thermohaline circulation. Part II:
488    C        Sensitivity with interactive transport.
489    C        J. Climate 12(1), 83-91
490    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
491    C        Destabilization of the thermohaline circulation
492    C        by atmospheric eddy transports.
493    C        J. Climate 7(12), 1870-1882
494    o Will need long integration testing.
495    checkpoint53b_pre
496    
497    o created pkg/mom_common in preparation for variable viscosity code
498    o renamed and split ini_mnc_io
499    o pkg/land: only liquid water can diffuse or run-off
500    o AIM using land: soil wetness availability account for snow
501    o added printMapIncludesZeros to EEPARMS namelist
502    
503    checkpoint53a_post
504    o restore TAMC compatiility for exf_constants.h
505      (no usage of _d in .h)
506    o Additional storing in KPP in an attempt to fix
507      TAMC problem with adjoint of KPP code.
508      (no success...)
509      Identical code works fine with TAF.
510    o Fixed verification/natl_box_adjoint experiments.
511      Initial conditions for Experiments 4 and 5 are now
512      set to "SEAICE_initialHEFF=0", which is more reasonable,
513      and hence gives results closer to that of Experiment 2.
514      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
515    
516    checkpoint53
517    o stable checkpoint with up to date adjoint
518      TLM tests only run for 1st grdchk at the moment. Its unclear if
519      this is a code problem or a problem with resetting code for g_
520      variables that is being autogenerated wrong.
521      Otherwise:
522       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
523       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
524         are both still in chaos following their security messes.
525    
526    checkpoint52n_post
527    o various build (mostly genmake2) changes including:
528      - ability to build/run more easily within Cygwin and MacOS X
529      - more complicated Makefiles with a stronger dependence on Gnu Make
530    o pkg/seaice modifications
531      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
532        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
533        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
534      - changed proxy for geostrophic velocity and updated
535        verification/lab_sea/results/* accordingly
536      - removed ADI dynamic solver from pkg/seaice
537      - replaced all occurrences of 1/CSTICE or 1/CSUICE
538        they caused a segmentation fault under certain circumstances
539      - removed unused field WATR
540    o bug fix in exf-package:
541      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
542         now reflect that.
543    o small fixes in the cal-package:
544      - set reference date to first of January for the 'model'-calendar
545      - failing of cal_CheckDate in cal_FullDate now actually results in a
546        warning
547    o small modifications in exf-package to increase flexibility:
548      - change climtempfreeze from a constant to a runtime parameter that
549        is specified in data.exf_clim (default = -1.9)
550      - introduce runtime parameter windstressmax (default = 2.0) that is
551        specified in data.exf
552    o fix in pkg/thsice:
553      - update Evap (Tsf changes) to be consistent with Latent heat flux
554      - maintain snow precipitation unchanged (even if Tsf >=0).
555     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
556    
557    checkpoint52m_post
558    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
559      this does not change any of the results, because myIter=0 in swfrac always
560      lead to jwtype=2 (the default anyway), but the call makes little sense
561      as a default
562    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
563    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
564      atmospheric model (AIM) to use it ; add a "slab ocean" component.
565    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
566    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
567    o extending useSingleCpuIO option to work with new exch2 I/O format
568      - old-style, missing-tile I/O is still accessible by defining CPP
569        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
570    o monitor package can write to NetCDF files and/or STDOUT
571    o fix re-definition bug in MNC_GRID_INIT_ALL()
572    o doc/api_reference added
573      - a framework for building an API Reference Manual using all
574        the "protex" comments embedded in the code
575      - see pkg/generic_advdiff, pkg/mnc for examples
576    o MNC:
577      - make myThid the last argument for all subroutines
578      - new default for the grid files: NO halos
579      - add useMNC and other run-time flags
580      - separate per-file-group handling of the unlimited dimension
581      - early initialization of MNC w/ flags read at the eeboot stage
582        and lookup tables set in initialize_fixed
583      - write all MNC output to a freshly-created directory
584    o thermodynamics sea-ice (thsice) is now tested with testreport.
585    o test exp. advect_cs: use the standard cs32 grid ; update output.
586    o Added functionality to grdchk:
587      pick global i,j,k position (or nearest wet) where to perform check.
588    
589    checkpoint52l_post
590    o new land formulation:
591      a) use ground enthalpy as prognostic variable to ensure exact
592         energy conservation.
593      b) account for water temperature and for latent heat of freezing
594         in all processes (rain, run-off, ground storage)
595      c) compute surface and ground temperature implicitly.
596    o aim_v23 modification for new land model:
597      a) Treat separately land / ocean / sea-ice surface fluxes
598         to allow implicit computation of land & sea-ice surface temp.
599      b) add snow precipitation.
600    checkpoint52l_pre
601    
602    o fix problem (when 1 tile is empty) in min/max monitor.
603    o fix bug in timeAve (u,vZetatave in common block)
604    o no restoring terms under ice for pkg/seaice
605    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
606    o bug fix for pkg/seaice pickups
607    o change MNC call locations and add coordinate attributes
608    o mask vorticity at the corner ; affects global_ocean.cs output
609    o fix ini_curvilinear_grid ; test CS experiments with mpi
610    o aim.5l_cs: modify sea-ice fraction input file ; update output
611    o exf: Adding simple range check routine for exf fields after read
612    
613    checkpoint52k_post
614    o removed top-level directory "diags"
615      - we migrated these functions to pkg/timeave a long time ago
616    o fixed bug introduced in pkg/monitor
617    o accuracy ctrlprec = 32 insuffient for gradient checks using
618      averaged fields (I/O via cost_averages)
619      -> use ctrl.h in active_file*.F to control I/O precision.
620    o paramter list of CALL ADTHE_MAIN_LOOP
621    o added initial do_the_model_io to ecco
622    o set all ...Freq to zero after cost_final
623      taveFreq, dumpFreq, pChkptFreq
624    o MAIN and ECCO differentiability restored
625    
626    checkpoint52j_post
627    o fix nchklev in tamc.h for global_ocean...
628    o Bringing flow and store directives up-to-date
629    o Really weird thing!
630      call do_the_model_io from the_main_loop with parameters
631      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
632      TAF places a faulty re-call of initialise_varia
633      after cost_final call which should not be there!
634    checkpoint52j_pre
635    
636    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
637      error messages
638    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
639    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
640      debug output
641    o modfied mdsio_writefield.F to handle non-global files under exch2
642    o update AIM Cubed-Sphere exp (aim.5l_cs):
643      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
644    o update AIM Equatorial Channel exp:
645      use standard aim_v23 pkg and change the SST fields to be more realistic.
646    o globalFile now works with exch2
647    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
648      mon_vort3.F to make exch2 friendly with >1 tile per cube face
649    o limit timeave output for hi-res integrations
650    
651    checkpoint52i_post
652    o removed CPP_EEOPTIONS.h from verification/*/code
653    o updated the tiling for global_ocean_pressure
654    checkpoint52i_pre
655    
656    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
657      the old pkg/aim).
658    
659    checkpoint52h_pre
660    o shortened offending lines in exch2_send_rx?.template
661    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
662    o genmake2: add build & execute test for NetCDF code
663    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
664      old grid files, moved CPP_EEMACROS.h to pkg/exch2
665    o added useSingleCPUIO flag to monitor.F and mon_out.F
666    o added temporary hack for sea-ice dynamics on the cube:
667      metric terms are ignored and it is assumed that
668      there is no sea-ice on cube faces 1, 2, 4, and 5.
669    
670    checkpoint52f_post
671    o added exch2 cube routines to pkg/exch2
672    o modified hs94.cs-32x32x5 to use it
673    o added new grid files to hs94.cs-32x32x5
674    checkpoint52f_pre
675    
676    checkpoint52e_post
677    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
678      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
679    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
680      to work with implicit vertical advection and AB ;
681    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
682    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
683     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
684    checkpoint52e_pre
685    
686    o fix bug in impldiff when Nr=1 or Nr=2.
687    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
688    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
689    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
690      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
691    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
692    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
693    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
694    
695    checkpoint52d_post
696    o re-tiled many expts to allow comparison in multi-processor mode
697      - updated output accordingly
698      - changed hs94.128x64x5 to use intial T from file rather than use the
699        random number generator
700    o add infrastructure in model routines for fizhi and gridalt packages
701    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
702    o changes to permit hi-res, cubed-sphere, configuration
703      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
704      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
705      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
706        of surface winds for the cube
707      (A verification experiment, based on global_ocean.cs32x15, but with
708       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
709       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
710       complete with example surface forcing files and matlab scripts to look
711       at the output and compare it with that of global_ocean.cs32x15.)
712    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
713       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
714       to conform to the common rule.
715    o check-in the first version of the coupler + interfaces for multi-components
716       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
717       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
718       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
719       - ocean and atmos. share the same horizontal grid (no interpolation).
720       - exchanges between component and coupler is done in forward_step
721    o new verification experiment, cpl_aim+ocn:
722       coupled ocean - AIM atmosphere on cs32 grid.
723    
724    checkpoint52d_pre
725    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
726    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
727    
728    checkpoint52c_post
729    o Fixing OPTIONS files for use of exf:
730      - ALLOW_ECCO not needed
731      - ECCO_CPPOPTIONS.h should not be included from
732        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
733        as has been the case in the past
734      - All cal/exf related options are currently set in
735        single header file. Should remain so until we
736        agree on a consistent new policy.
737    o Removed all CPP options for cal package.
738      cal has no more CPP options.
739    o modified STOREs in GAD_ADVECTION
740    o corrected key comp. for passkey
741    
742    checkpoint52b_post
743    o new version: "thsice" of thermodynamic sea-ice pkg:
744     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
745     - modify fluxes but do not change theta directly;
746     - light cleaning of bulk_force pkg (still needed with thsice).
747     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
748       + output_thsice.txt to test thsice & bulk_force pkgs.
749    o put back grid & coriolis monitor output.
750    checkpoint52b_pre
751    
752    o call "do_the_model_io" at the beginning (=> dump initial state)
753    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
754    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
755      (need info on NUMBER_OF_PTRACERS)
756    o missing PTRACERS headers in some routines
757    o default tamc.h in pkg/autodiff supposed to crash
758      to ensure proper customization
759    
760    checkpoint52a_post
761    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
762      - moved surfaceTendencyTice from pkg/seaice to main code
763      - subroutine FREEZE_SURFACE now limits only surface temperature
764        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
765        => new output.txt for global_ocean.cs32x15 & global_with_exf
766      - keep the old version of FREEZE for backward compatibility;
767        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
768      - corresponding modifs for TAF directives
769    o added surface flux output variables to TIMEAVE_STATVARS
770    o time-averaged output for pkg/ptracers
771    o fix problem with ECCO-related divided adjoint
772      snapshot file was missing some ad-variables,
773      but no warning issued by TAF
774    
775    checkpoint52a_pre
776    o some bug fixes for #undef REAL4_IS_SLOW
777    
778    checkpoint52 = ecco_c52_e35
779    o after testing adjoints of checkpoint51u_post
780    
781    checkpoint51u_post
782    o this is the post-merge tag of the ecco-branch
783      (needs another clean checkout and re-testing)
784    o various natl_box_adjoint configs and results
785      but no input fields
786    o obcs adjoint not yet merged!
787    o adding ECCO global 1x1 and 2x2 degree configs
788    o updated/extended some store directives for seaice
789    o pkg/ecco now containes ecco-specific part of cost function
790    o top level routines the_main_loop, forward_step
791      supersede those in model/src/
792      previous input data.cost now in data.ecco
793      (new namelist ecco_cost_nml)
794    o in ctrl/ cleaned some cross-dependencies and updated CPP options
795    
796    checkpoint51t_post
797    o this is the pre-merge tag of the ecco-branch
798    
799    checkpoint51s_post
800    o cleanup: removed various obsolete #define-s
801    o pkg/grdchk
802      - renamed 'ph-grd 3' to 'grad-res'
803      - merged from ecco-branch
804        (remaining bug fixes for obcs gradient checks)
805      - additional high-precision output for testreport
806        (grep for 'precision_grdchk_result')
807    
808    checkpoint51r_post
809    o cleaned up or removed CPP_OPTIONS.h files
810    o updated results for some of the tests to reflect the new
811      optfiles (-ieee: -O0 instead of -O3)
812    
813    checkpoint51q_post
814    o cd_code:
815      - moved cd_scheme.F -> cd_code_scheme.F
816      - separate read_checkpoint from cd_code_ini_vars.F
817      - separated cd_code part from write_checkpoint
818      - updated AD_SOURCE, generated .flow
819      - added CD_CODE_VARS.h to the_main_loop
820      - Moving cd_code specific store dir.s to pkg/cd_code
821    o ctrl package totally restructured
822      - pack/unpack now optional and decoupled from
823        xx_/adxx_ I/O
824      - ctrl_pack/unpack cleaned
825        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
826      - confined inclusion of AD_CONFIG.h to where necessary.
827    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
828    
829    checkpoint51p_post
830    o create initial cd_code package
831      - WARNING: the initialization of fields within packages
832        is broken because INI_FIELDS (where READ_CHECKPOINT is
833        called) is called *before* PACKAGES_INIT_VARIABLES.
834        This seems to be backwards since
835        1) its important to initially zero the entire field including
836           the "halo" region
837        2) zeroing needs to be done *before* reading pickup info
838           and the pickup call might or might not happen in any
839           particular run
840      - this needs an overhaul for R2
841    o cleanup verification/*/code/GMREDI_OPTIONS.h
842    o cleanup testreport
843    
844    checkpoint51o_post
845    o bringing AD-related verif's up to date with genmake2
846      - carbon/
847      - global_ocean.90x40x15/
848      - hs.94.1x64x5/
849      - (front_relax/ )
850    o (more) consistent directory structure for AD-related verif.'s
851    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
852    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
853    o bug fix in find_alpha.F for MDJWF:
854      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
855        change rho -> rho-rhoConst
856      - replace call find_rho to find_rhonum
857    o initialisation of rFlx extended to full array (required by TAF)
858      and shifted to thermodynamics
859    o removed PTRACERS.h in ptracers routine
860    o added surfacetendencyPtr to S/R parameter list pracers_forcing
861    o Correcting initialisations for fVerU, fVerV.
862    o helping TAF to recognize dependency on kUp for
863      fVerU, fVerV
864    o Replacing delZ by delR in pkg/ctrl/
865    checkpoint51o_pre
866    
867    o undid all of cp51 pending some cleanups and discussion
868    o added the [#include "AD_CONFIG.h"] statement to all files that need
869       it for adjoint/tl #defines
870     o re-worked the build logic in genmake2 to support AD_CONFIG.h
871     o removed tools/genmake since it no longer works
872    
873    checkpoint51n_post
874    o modifications to make FREEZE flux visible to pkg/kpp
875      - moved surfaceTendencyTice from pkg/seaice to main code
876      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
877      - subroutine FREEZE now limits only surface temperature
878        (this means new output.txt for global_ocean.90x40x15,
879         global_ocean.cs32x15, and global_with_exf)
880    o added surface flux output variables to TIMEAVE_STATVARS
881    
882    checkpoint51n_pre
883    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
884    o added [#include "AD_CONFIG.h"] to all files that use the following
885      defines:
886      - ALLOW_ADJOINT_RUN
887      - ALLOW_TANGENTLINEAR_RUN
888      - ALLOW_ECCO_OPTIMIZATION
889    
890    checkpoint51m_post
891    o incorporating changes to get TAMC/TAF working in genmake2
892      - added new TAMC/TAF targets to the Makefile
893      - various cleanups related to package handling
894      - these changes should have no impact on the forward model
895    
896    checkpoint51l_post
897    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
898     - faster algorithm for cal_addtime.F
899     - higher precision arithmetic, where needed
900     - pkg/exf *startdate variables changed from calendar date to
901       model integration time
902    
903    checkpoint51l_pre
904    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
905    o enable to apply restoring on S & T only in a latitude band.
906    o update output (external_forcing_surf modif. change truncation errors)
907       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
908    
909    checkpoint51k_post
910    o change default to: useNHMTerms=.FALSE.
911     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
912       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
913     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
914        exp1, ideal_2D_oce
915     - change data file of oceanic exp (leave the results unchanged for now)
916       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
917    o set gravitySign automatically according to the vertical coordinate used
918      (and change sign: back to "logical" value: +1 when R increases downward)
919    o added an include barrier to the default CPP_OPTIONS.h and
920      removed the #include "PACKAGES_CONFIG.h" from it
921    o fix a bug in mom_fluxform (from chk51j_post)
922    
923    checkpoint51j_post
924    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
925    o adjusted some flow directives (dynamics, thermodynamics)
926    o added cubed-sphere case to test cost function
927    o heckpoint_lev?_directives.h now include
928      pkg-specific directives, whenever those are enabled.
929    o Moving pkg-specific flow directives to corresponding pkg
930      Moving pkg-specific differentiation list to corresponding pkg
931      Moving pkg-specific checkpoint-lev storing to corresponding pkg
932      ---> conventions are
933           - pkg_ad.flow
934           - pkg_ad_diff.list
935           - pkg_ad_check_lev?_dir.h
936    
937    checkpoint51i_post
938    o merge of the branch-genmake2
939      - knowingly breaks the older genmake
940      - automatic generation of all ALLOW_${PKG_NAME} defines
941      - new testreport supersedes older testscript
942    o large number of package inclusion and header cleanups
943    checkpoint51i_pre
944    
945    o new output for adjoin of global ocean vector invariant
946    o fix for checkpoint of thermodynamic seaice and bulk_force
947    o Steph gchem various cleanups
948    
949    checkpoint 51h_pre
950    o fixed some single quotes
951    o modify gchem pkg to be more versatile
952    o modifications to clean up dic pkg
953    o add pkg/cfc
954    
955    checkpoint51g_post
956    o provide links for ARPACK and ADM*TLM
957    o start removing verification/vero/
958    o update AD-related stuff
959      (in particular some IF-statements in model/src/ routines)
960    o adding to verification/global_ocean.90x40x15/ adjoint of
961      vector invariant setup
962    
963    checkpoint51f_post
964    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
965    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
966      of tracer Green's fucntions for ocean inversion project.
967    
968    checkpoint51f_pre
969    o Added on-the-fly spatial interpolation capability
970        "USE_EXF_INTERPOLATION" to pkg/exf.
971      - This is a temporary Cartesian-grid hack until
972        the super-duper ESMF coupler becomes available.
973      - See verification/global_with_exf/README for usage example.
974      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
975        flags and modified pkg/seaice accordingly.
976    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
977        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
978        non-local transport term.
979    
980    checkpoint51e_post
981    o pkg/mom_vecinv:
982      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
983      - add time-ave diagnostic of vorticity advection.
984    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
985    o atmospheric geopotential: - include water vapor effect;
986                                - use p^kappa in p* scaling.
987    o land pkg: read initial state from files.
988    o AIM : add stratospheric drag in the upper level
989    
990    checkpoint51d_post
991    o change function ILNBLNK (=> last non-blank char.) to return zero
992      (instead of the string length) when the string. char is empty
993    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
994    o modif's to restore TAMC compatibility
995      - avoid "_d" constructs in PARAMETER declarations
996      - avoid interrupting lines by comment lines
997    o Use cluster local disks for purely local I/O
998      vs. globally visible disks needed for ctrl stuff
999      (merged from ecco-branch)
1000      - new active_file_loc... and mdsio_..._loc routines
1001      - affected packages: autodiff, ctrl, grdchk, mdsio
1002    
1003    checkpoint51c_post
1004    o introducing integer flag debugLevel
1005      - debLevZero: suppress all output
1006      - debLevA: standard
1007      - debLevB: equivalent to current debugMode=.TRUE.
1008    o introducing pathname variable mdsioLocalDir for mdsio
1009      that can be specified at runtime
1010      (relevant for cluster I/O to local disk)
1011    `
1012    >>>checkpoint51b_post
1013    adjoint of ptracers
1014    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1015    o extended state in checkpoint_lev?, etc.
1016    o alternative ctrl/cost with tr1 or ptracer
1017    o new comlev1_bibj_ptracers
1018    o new ptracers.flow
1019    o made ptracers_forcing same as external_forcing_s
1020    o added verification for adjoint with ptracers
1021      - adm. grdchk fail so far
1022      - tlm. grdchk OK
1023      - checked tapelev/comlev recomputations: OK
1024    <<<checkpoint51b_pre
1025    
1026    checkpoint51a_post
1027    o added code for biogeochemistry package
1028      - new pkgs: dic, gchem
1029      - new subroutine in ptracers
1030    o modify code for biogeo packages
1031      - in model/src and pkg/ptracers
1032    
1033    checkpoint51
1034    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1035      - autodiff, ctrl, exf, grdchk, seaice
1036      kept separate packages
1037      - cost, ecco, obcs
1038    o updating verification/internal_wave, verification/lab_sea
1039      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1040    
1041    checkpoint50i_post
1042    o Preparing next differentiable checkpoint and sync
1043      of MAIN vs. ecco-branch
1044      - 1st step: this one is differentiable
1045      - 2nd step: next(! not this) checkpoint will have updated packages
1046                  from ecco-branch)
1047    
1048    checkpoint50h_post
1049    o new package "land": provide surface BC for AIM.
1050    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1051    o AIM: use true log-P extrapolation for near surface temp (= as in
1052        F.Molteni paper) ; update aim.5l_cs output.
1053    o New variable in PARM03 for more flexible pickups
1054    o somewhat cleaned package initialisation sequence for
1055      ctrl/ cost/ ecco/ in packages_... routines
1056    
1057    checkpoint50g_post
1058    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1059      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1060      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1061        made the default because of faster convergence than ADI
1062    
1063    checkpoint50f_post
1064    o exf totally restructured
1065      - replaced all exf_set_ routines by one generic exf_set_gen.F
1066        and made sure it's still differentiable
1067      - split exf_getffields.F into new exf_bulkformulae.F
1068      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1069      - updated adjoint/makefile and relevant verif. accordingly
1070    
1071    checkpoint50f_pre
1072     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1073          + change Evap over land. (update aim.5l_cs output)
1074     o added missing .cvsignores and made uniform across expts
1075     o changed configuration of tidal_basin_2d expt
1076     o added pkg/debug functions for tracing code in fatal crashes
1077     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1078     o new fn in pkg/monitor to stop model if solution grows too big
1079     o removed lots of single quotes from comments
1080    
1081    checkpoint50e_post
1082    o make KPP work with PTRACERS
1083     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1084       nearly a copy of kpp_transport_s
1085     - there is no analogue to SurfaceTendencyS, so I have to use
1086       gPtr(of the surface layer) instead
1087    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1088    checkpoint50e_pre
1089    
1090    checkpoint50d_post
1091    o change kpp output from multiple-record state files to single-record state
1092      files analogous to write_state.F
1093    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1094      analogous to the cg2d-related output.
1095    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1096      so that writing to internal file fn (with length 512) fails.
1097    checkpoint50d_pre
1098    
1099    checkpoint50c_post
1100    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1101    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1102    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1103    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1104    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1105    
1106    checkpoint50c_pre
1107    Merging from release1_p13:
1108    o bug fix for pkg/seaice dynamic solver
1109    o Added SEAICE_initialHEFF to pkg/seaice
1110    
1111    checkpoint50b_post
1112    o store u*,v* in gU,V instead of in guNm1,gvNm1
1113    o in order to put the momForcing out of the Adams-Bashforth:
1114      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1115      to timestep.F
1116    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1117    o re-generate output for highly sensitive test-exp:
1118       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1119    
1120    checkpoint50b_pre
1121    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1122    o corrected CPP option mismatch in exf_Bulk... functions for case
1123      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1124    
1125    checkpoint50a_post
1126    o Bug fix for merging between c50 and KPP.
1127      ikey was passed from thermodynamics to kpp_calc via
1128      common block rather than being recomputed in kpp_calc,
1129      in contradiction with new key itdkey.
1130      New key ikppkey created, and tamc.h headers updated.
1131    
1132    checkpoint50
1133    - 2nd step of merge with ecco-branch:
1134      merge changes in ecco-branch back into main trunk
1135    - bug fix in find_alpha
1136    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1137    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1138    - merged some sliced AD support routines
1139    
1140    checkpoint49
1141    merged from ecco-branch:
1142    o exf:
1143      - Enable initialisation of forcing fields to constant
1144        (runtime) values.
1145      - in exf_getffields.F
1146        Reduce i-/j-loop to interior domain, discarding overlaps.
1147        That also fixes wrong TAF-key computations for key_1, key_2
1148        with bulf formulae.
1149      - exf_init.F modify #ifdef for exf_init_evap
1150      - exf_getffieldrec.F, ctrl_getrec.F
1151        The following INT-usages are not safe:
1152          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1153          fldcount = int(fldsecs/fldperiod) + 1
1154        and were modified.
1155    o autodiff: checkpoint_lev...
1156      - updated storing for bulk formulae (some arrays were missing)
1157      - added state for seaice package
1158      - synchronized with main branch
1159    o DIVA:
1160      Modif.s in
1161      - the_main_loop.F
1162      - the_model_main.F
1163      and added cost_final_restore.F cost_final_store.F
1164      o With these changes, it is possible to fully separate
1165        the first forward run to compute the cost function (mdthe_main_loop)
1166        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1167        into separate model executions.
1168        This enables better tuning of DIVA to given queue sizes.
1169      o Loss of cost function value in consecutive DIVA runs is
1170        fixed by storing to 'costfinal' file.
1171      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1172        beginning/end of adjoint integration is accounted for.
1173      The current changes apply to TAF-1.4.26.
1174      TAF has one remaining bug, requiring one manual change
1175      (see MITgcm manual).
1176    o cal: synchronized between MAIN and ecco-branch
1177    
1178    checkpoint48i_post
1179    o Changes to restore differentiability of code w.r.t. previous tag
1180      (mostly adding new routines to make list and replacing
1181      pressure by totPhiHyd).
1182    o Updated and merged grdchk package
1183      - has both ADM and TLM checks
1184      - works for single- and multi-proc.
1185      - output cleaned
1186      - worked successfully for parallel DIVA
1187    o genmake:
1188      - Adding -platform=SP4
1189      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1190    o Modif. for DIVA:
1191      ctrl_unpack should not be called in intermediate DIVA interval.
1192      (similar thing would apply for active files such as
1193      tbar, sbar, psbar, which should not be reinitialised;
1194      only relevant for ecco-branch)
1195    
1196    checkpoint48h_post
1197    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1198    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1199    o Added SEAICE_initialHEFF to pkg/seaice
1200    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1201    
1202    checkpoint48g_post
1203    --- EOS:
1204    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1205      store total Potential in totPhyHyd for diagnostics & EOS.
1206    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1207    --- Pressure/geopotential gradient:
1208    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1209    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1210      ( changes results of global_ocean_pressure )
1211    o NLFS + z-coord.: add eta*Rho' contribution.
1212    o accurate phiHyd when using interface-W at the middle between 2 centers
1213     ( changes results of ideal_2D_oce )
1214    o includes r* 2nd term in potential gradient.
1215    
1216    checkpoint48f_post
1217    Merging from release1_p12:
1218    o Modifications for using pkg/exf with pkg/seaice
1219      - improved description of the various forcing configurations
1220      - added basic radiation bulk formulae to pkg/exf
1221      - units/sign fix for evap computation in exf_getffields.F
1222      - updated verification/global_with_exf/results/output.txt
1223    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1224      (SBO) core products, including oceanic mass, center-of-mass,
1225      angular, and bottom pressure (see pkg/sbo/README.sbo).
1226    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1227      to avoid negative values in shallow regions.
1228      - updated verification/natl_box/results/output.txt
1229      - updated verification/lab_sea/results/output.txt
1230    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1231    o Added useSingleCpuIO option (see PARAMS.h).
1232    o Updated useSingleCpuIO option in mdsio_writefield.F to
1233      work with multi-field files, e.g., for single-file pickup.
1234    o pkg/seaice:
1235      - bug fix in growth.F: QNET for no shortwave case
1236      - added HeffFile for specifying initial sea-ice thickness
1237      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1238    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1239      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1240    o pkg/seaice:
1241      - adjoint-friendly modifications
1242      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1243    
1244    checkpoint48e_post
1245    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1246    o dynamics: change definition of computational domain & adapt mom_fluxform
1247      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1248    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1249        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1250        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1251        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1252        inverted_barometer solid-body.cs-32x32x1
1253      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1254    
1255    checkpoint48d_post
1256    o in preparation for r*:
1257     a) use pre-computed gradient of hydrostatic potential:
1258        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1259     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1260        => affects results of glob_oce_pressure (different truncation error)  
1261      update output.txt of ideal_2D_oce & global_ocean_pressure
1262    
1263    checkpoint48d_pre
1264    o in preparation for r*:
1265      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1266      pass the 2 comp. of the grad. as arguments to momentum S/R.
1267      but for the moment, only used if it does not change the results.
1268    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1269    
1270    checkpoint48c_post
1271    Modifications in treatment of initial flux forcing controls
1272    to avoid extra storing of flux fields.
1273    
1274    checkpoint48c_pre
1275    o Added tidal_basin_2d experiment (currently 1D!)
1276    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1277    
1278    checkpoint48b_post
1279    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1280     (modification to pressure gradient not yet implemented)
1281    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1282      (for U & V) that are used for vertical advection of momentum.
1283    
1284    checkpoint48a_post
1285    o In preparation for r*, use temp. array to compute vertical transport
1286       in flux-form momentum pkg. => change results of few test-exp.
1287      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1288                        lab_sea, natl_box & plume_on_slope
1289    
1290    checkpoint48
1291    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1292    
1293    checkpoint47j_post
1294    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1295    o moved adexch from forward_step to addummy_in_stepping
1296    o added exch in ctrl_map_...
1297    o aveFreq.=0. at end of cost_final to avoid overwrite in
1298      reverse checkpointing loop
1299    o Yet more changes in gmredi:
1300      * adgmredi_calc_tensor
1301        avoiding all recomputation of gmredi_slope_limit
1302      * adgmredi_x/y/rtransport
1303        added flag for excessive storing to avoid recomp. of
1304        u/v/rtans, dTdx/y/z
1305        -> this is not really necessary and very memory-consuming
1306      * adgmredi_slope_psi:
1307        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1308      * gmredi_slope_limit
1309        re-activated full calculation of taperfct for case 'ac02'
1310    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1311    
1312    checkpoint47i_post
1313    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1314    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1315      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1316    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1317    o gmredi: fix few bugs.
1318    
1319    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1320    This will be a good checkpoint to plug into the ecco-branch.
1321    o few modif.'s to get latest version adjointed
1322      (mainly kick out code in ini_linear_phisurf)
1323    o modif's to run adjoint with exactConserv
1324    o case GM_BOLUS_ADVEC should be cleaned
1325      S/R gmredi_slope_psi should be cleaned
1326    o verification/carbon now has exactConserv=.TRUE.
1327    
1328    checkpoint47g_post
1329    o time-average AIM output: becomes independent from statvars time-average
1330      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1331    o After TAF bug fix:
1332      Tested adjoint of gmredi package.
1333      Tests were done with checkpoint47 rather than with latest
1334      checkpoint47f_post since the latter is broken for the adjoint
1335      verification/carbon/ contains both ADM and TLM gradient checks.
1336    Here they are, before they get changed/lost/stolen.
1337    Mostly modif.'s to fix numerical sensitivities.
1338    Gradient checks OK for
1339    - GM_taper_scheme:
1340      * clipping
1341      * ac02
1342      * linear
1343      * glw91
1344      * dm95
1345      * ldd97
1346    - GMREDI_OPTIONS:
1347      * GM_VISBECK_VARIABLE_K
1348      * GM_NON_UNITY_DIAGONAL
1349      * GM_EXTRA_DIAGONAL
1350      * GM_BOLUS_ADVEC
1351    in conjunction with data.gmredi parameters to be checked in
1352    in a few minutes under verification/carbon/code/
1353    
1354    checkpoint47f_post
1355    Merging from release1_p10:
1356    o modifications for using pkg/exf with pkg/seaice
1357      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1358        and SEAICE_EXTERNAL_FLUXES
1359      - pkg/exf CPP options EXF_READ_EVAP and
1360        EXF_NO_BULK_COMPUTATIONS
1361      - usage examples are Experiments 8 and 9 in
1362        verification/lab_sea/README
1363      - verification/lab_sea default experiment now uses
1364        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1365    
1366    checkpoint47e_post
1367    o created a tag prior to creating a branch
1368    
1369    checkpoint47d_post
1370    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1371      at the bottom boundary had an erroneous half slip boundary condition
1372    o added bottom drag and no slip boundary condition capabilities to
1373      oceanic pressure coordinates code
1374    o added new verification experiment global_ocean_pressure, this experiment is
1375      also described in the tutorial section of the manual
1376    checkpoint47d_pre
1377    
1378    checkpoint47c_post
1379    o Added a verification experiment for a global cubed-sphere ocean run
1380      -  verification/global_ocean.cubed32x32x30
1381      -  uses pkg/therm_seaice and pkg/bulk_forcing
1382    
1383    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1384    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1385      when using P-coordinate; only implemented for atmospheric config.
1386    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1387      NOTES: requires option NONLIN_FRSURF to be "#define".
1388    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1389    
1390    checkpoint47b_post
1391    Merging from release1_p9:
1392    o pkg/seaice
1393      - removed GOTO's and added taf directives
1394      - double precision constants to reduce the g77 (Linux)
1395        to F77 (SGI) differences reported in release1_p8
1396    o tools/genmake
1397      - added SGI options
1398    o verification/testscript
1399      - updated to that of checkpoint47a_post
1400    o verification/global_ocean.90x40x15/input/eedata
1401      - modified for SGI f77 compatibility
1402    o verification/lab_sea
1403      - added description of sea-ice model
1404      - added missing matlab routines
1405      - added test of thermodynamics parallelization
1406    
1407    checkpoint47a_post
1408    o new pkg: aim_v23
1409     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1410       for now, keep the same surface forcing as before.
1411     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1412     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1413     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1414    o add diagnostic of surface correction term in monitor output
1415    
1416    o bulk_force and therm_seaice
1417    - Two packages:  bulk_force (Bulk forcing)
1418      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1419    - Earlier integration from Stephaine Dutkiewicz
1420      and Patrick Heimbach.
1421    - Two ifdef statements for compile time,
1422       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1423    
1424    checkpoint47
1425    differentiable version of checkpoint46n_post
1426    o bug fix in quasihydrostaticterms
1427    o * "clean" adjoint code (in terms of extensive recomputations)
1428        can now be obtained for all GMREDI options (i.e. for
1429        - GM_VISBECK_VARIABLE_K
1430        - GM_NON_UNITY_DIAGONAL
1431        - GM_EXTRA_DIAGONAL
1432        - GM_BOLUS_ADVEC )
1433      * However, wrong gradient check problem remains unsolved.
1434      * New CPP options have been introduced for different
1435        tapering schemes
1436    o external_fields_load now part of differentiation list
1437    o pressure needs multiple storing;
1438      would be nice to have store_pressure at beginning or
1439      end of forward_step, e.g. by having phiHyd global (5-dim.)
1440      (NB: pressure is needed for certain cases in find_rho,
1441      which is also invoked through convective_adjustment).
1442    o recomputations in find_rho for cases
1443     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1444    o #define ATMOSPHERIC_LOADING should be differentiable
1445    o ini_forcing shifted to begining of initialise_varia
1446    o Incorporating QNVS line search routines into MITgcm
1447      (this is separate code, and therefore not under pkg)
1448      lsopt/, optim/
1449    o Updated verification/carbon/
1450      - #define GM_VISBECK_VARIABLE_K
1451      - GM_taper_scheme    = 'ldd97'    
1452    
1453    checkpoint46n_post
1454    Merging from release1_p8:
1455    o verification/natl_box:
1456      updating new external_fields_load routine
1457    o New package: pkg/seaice
1458      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1459      The sea-ice code is based on Hibler (1979-1980).
1460      Two sea-ice dynamic solvers, ADI and LSR, are included.
1461      In addition to computing prognostic sea-ice variables and diagnosing
1462      the forcing/external data fields that drive the ocean model,
1463      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1464      The implied surface heat flux is then stored in variable
1465      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1466      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1467      non-local transport term.  Because this call precedes model
1468      thermodynamics, temperature under sea-ice may not be "exactly" at
1469      the freezing point by the time theta is dumped or time-averaged.
1470      N.B.: fairly large differences in accuracy occur across
1471            different platforms/compilers; comparison between
1472            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1473            generated output gives:
1474       T           S           U           V
1475      C D M    c        m  s        m  s        m  s        m  s
1476      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1477      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1478      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1479    
1480      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1481    o GAD:
1482      - generated new common blocks to account for call of
1483        same gad routines with differing traceridentities
1484        (needed to modify tracerIdentity indices in GAD.h)
1485      - generated separate common blocks for case useCubedSphereExchange
1486        (Department of Futurology)
1487      - parameter lists to gmredi_?transport: added tracerIdentity
1488      - added new key indices to tamc.h
1489    o external_fields_load:
1490      - added this routine to TAF list
1491      - needed to make some common blocks global and additional storing
1492        along the same lines as exf package (checkpoint_lev?_directives.h)
1493    o exf:
1494      updated external forcing package
1495      - bug fixes carried over from ecco-branch
1496        (missing OBCS_OPTIONS.h in two routines)
1497      - enable easy to use "no forcing".
1498      - added exf I/O for atmospheric loading
1499      - added exf I/O for runoff data
1500      - transfered scaling between exf <-> MITgcm to exf namelist
1501    o Adding new verification experiment global_with_exf.
1502      This verification experiment is almost identical to the
1503      global_ocean.90x40x15 experiment, except that it uses
1504      the exf (and cal) package instead of the
1505      external_fields_load routine (cf README file).
1506    
1507    checkpoint46m_post
1508    o modified testscript to return -- when there are no lines of "%MON" output
1509    o added new flag "quasiHydrostatic" for QH mode
1510      and new routine quasihydrostaticterms()
1511    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1512      New routine: mom_u_coriolis_nh()
1513    o fixed sign of non-hydrostatic metric terms in u and v equations.
1514      Depend on correct sign of gravitySign.
1515    o added work.pc* to .cvsignore in aim directories using ifc
1516    o introduced flag for controllin non-hydrostatic metric terms
1517    o removed gravitySign from PARM04
1518    o switched to g77/ifc from pgf77 in aim experiments
1519    
1520    checkpoint46l_post
1521    o made convective adjustment work with pressure coordinates:
1522     - changed the direction of k-loop in convective_adjustment.F for the
1523       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1524     - adjusted the reference pressure k-index in convective_adjustment.F
1525     - adjusted the convection condition in convect.F (in analogy to
1526       calc_ivdc.F)
1527     - convective_adjustment no longer computes anything on the halos
1528     - removed the warnings about negative salinity from find_rho.F and
1529       find_alpha.F; instead the new routine look_for_neg_salinity, called
1530       at the beginning of find_rho, find_alpha, and find_beta, does a
1531       check of the entire slice, if CPP-option
1532       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1533    checkpoint46l_pre
1534    
1535    checkpoint46k_post
1536    o fixed the verification/global_ocean.90x40x15 experiment:
1537     - new bathymetry (the world according to A., JMC, and M.)
1538     - new initial fields and forcing fields (*.bin files)
1539     - new POLY3.COEFFS (for the next release one should switch to a full
1540       equation of state: JMD95P or MDJWF)
1541     - fixed several errors and redundancies in the data file
1542     - experiment uses looped cells
1543     - added matlab directory with diagnostic scripts for plotting of output
1544    
1545    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1546     - read AIM physics parameters from a file (data.aimphys)
1547     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1548    
1549    checkpoint46j_post
1550    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1551    o move wVel computation at the end of the time step, in S/R integr_continuity
1552    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1553    o update timeave pkg for wVel diagnostic.
1554    checkpoint46j_pre
1555    
1556    checkpoint46i_post
1557    o Clean up AIM package (and keep the results unchanged):
1558      include CPP_OPTION and use IMPLICT NONE in all routines ;
1559      declare all the variables _RL ; use _d 0 for all numerical constants.
1560      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1561    
1562    checkpoint46h_post
1563    o cleaned up the use of rhoNil and rhoConst.
1564      - rhoNil should only appear in the LINEAR equation of state, everywhere
1565        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1566        and the dynamical equations are all divided by rhoConst
1567    o introduced new parameter rhoConstFresh, a reference density of fresh
1568      water, to remove the fresh water flux's dependence on rhoNil. The default
1569      value is 999.8 kg/m^3
1570    o cleanup up external_forcing.F and external_forcing_surf.F
1571      - can now be used by both OCEANIC and OCEANICP
1572    checkpoint46h_pre
1573    
1574     Added code to convert surface volume flux (fresh water) into
1575     a mass flux when using P coordinates in the ocean (OCEANICP).
1576     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1577    
1578    checkpoint46g_post
1579    o Include a new diagnostic variable phiHydLow for the ocean model
1580      - in z-coordinates, it is the bottom pressure anomaly
1581      - in p-coordinates, it is the sea surface elevation
1582      - in both cases, these variable have global drift, reflecting the mass
1583        drift in z-coordinates and the volume drift in p-coordinates
1584      - included time averaging for phiHydLow, be aware of the drift!
1585    o depth-dependent computation of Bo_surf for pressure coordinates
1586      in the ocean (buoyancyRelation='OCEANICP')
1587      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1588        Theta, Salinity, and Pressure in the parameter list. This routine is
1589        presently contained in find_rho.F. This routine does not give the
1590        correct density for 'POLY3', which would be a z-dependent reference
1591        density.
1592    o cleaned up find_rho
1593      - removed obsolete 'eqn' from the parameter list.
1594    o added two new verification experiments: gop and goz
1595      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1596    checkpoint46g_pre
1597    
1598    checkpoint46f_post
1599    o Enable tangent linear (forward mode) gradient checks:
1600      - extended active file handling to g_... files
1601      - added TANGENT_SIMULATION to theSimulationMode
1602      - extended grdchk package accordingly
1603    o added tangent linear setup in verification/carbon/code_ftl
1604    o added adjoint setup in verification/front_relax/code_ad
1605    
1606    checkpoint46e_post
1607    o Added new equation of state -> MDJWF
1608      - EOS of McDougall et al., 2002, JAOT, submitted
1609      - caveat: the equation of state is only valid for a smaller (more
1610        realistic?) range of values than JMD95P/Z and UNESCO
1611      - added masks to the calculation of pressure in store_pressure
1612      - added more check values for density in check_eos (ini_eos.F), some of
1613        the old check values are out of the range of the MDJWF-eos, so don't
1614        expect perfect matches for those
1615    checkpoint46e_pre
1616    
1617    checkpoint46d_post
1618    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1619      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1620      case of pressure coordinates. eosType='JMD95Z' in
1621      combination with buoyancyRelation='OCEANICP' now causes an error.
1622    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1623      in find_alpha/beta.
1624    checkpoint46d_pre
1625    
1626    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1627      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1628    
1629    checkpoint46c_post
1630    o Changes necessary for ocean in p-coordinates
1631     -  Added new buoyancy relation = 'OCEANICP'
1632     -  Added new parameters = gravitySign (this used to be contained inside
1633        the factor dRdZ which I added when we first switched to R coordinates).
1634     X GM/Redi is not compatible (yet)
1635     X bottom drag and no-slip need to be debugged.
1636    checkpoint46c_pre
1637    
1638    checkpoint46b_post
1639    o Added new equation of state -> JMD95Z and JMD95P
1640      - EOS of Jackett and McDougall, 1995, JAOT
1641      - moved all EOS parameters into EOS.h
1642      - new routines ini_eos.F, store_pressure.F
1643    o Added UNESCO EOS, but not recommended because it requires
1644      in-situ temperature (see JMD95)
1645    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1646      unesco.f to be used with POLY3
1647    checkpoint46b_pre
1648    
1649    checkpoint46a_post
1650    o Added (atmospheric) pressure loading
1651      - new field in FFIELDS.h, etc...
1652      - new cpp flag ATMOSPHERIC_LOADING
1653    o Changed hFacC to _hFacC in calc_phi_hyd.F
1654    o Added SHORTWAVE_HEATING to some files for consistency
1655    checkpoint46a_pre
1656    
1657    checkpoint46
1658    further merges from release1_p5
1659    o new ctrl package
1660      - adopted from ECCO environment to enable optimization
1661      - added Eliassen Palm fluxes to controls
1662    o added Eliassen Palm flux controls to gradient check package
1663    o cost package
1664      - Compatible with new ctrl package
1665      - added Eliassen Palm cost hooks
1666      - modif's of existing cost functions
1667    o Adjoint-related bug fixes in kpp:
1668      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1669      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1670    o autodiff package
1671      - flow directives:
1672        + new for S/R do_the_model_io
1673        + enhanced for S/R checkpoint
1674        + new gmredi.flow
1675      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1676        disable adcommon.h/g_common.h by default.
1677      - fixed problem for adjoint of global_max
1678    o modified verification/carbon/
1679    o New setup for adjoint of global_ocean
1680    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1681    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1682    o incorporated hooks for sponge layer code (external_forcing.F)
1683    
1684    checkpoint45d_post
1685    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1686    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1687      (affects plume_on_slope "cg2d" output)
1688    o add new parameter deltaTfreesurf for free-surface time stepping
1689    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1690    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1691    o change phiMin in exp1 (to agree with documentation)
1692    o add new flags:
1693     - T,S forcing inside/outside Adams-Bashforth
1694     - turn off temp,salt advection and/or forcing
1695     - for each tracer, define internal flag for multiDimAdvection & A-B
1696    o monitor: change definition of KE to check conservation of Energy
1697    
1698    checkpoint45c_post
1699    o Removed f90 comments ("!")
1700    o Modified initialisations to enable exf package for MITgcm
1701      (without invoking ECCO_PACKAGE).
1702    o modifications to gradient check package (Martin Losch)
1703      - enable centered differences
1704      - modified format of standard output
1705    
1706    checkpoint45b_post
1707    o cleaned exchange calls in cg2d
1708    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1709    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1710      to configure barotropic setup (Martin Losch)
1711    o moved some initialisations within bi,bj loop in dynamics
1712      (TAF flow dependency)
1713    o in initialise_varia, moved call packages_init_variables
1714      before convective_adjustment_init
1715      (corresponding adjustment of TAF tape initialisation).
1716    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1717    
1718    checkpoint45a_post
1719    o compute Rho over the whole domain (extend iMin,jMin indices)
1720    o specific exchange for X-slice domain (case Ny=1)
1721    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1722    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1723    
1724    checkpoint44h_post = checkpoint45
1725    o Fix to restore differentiability:
1726      place at which packages_init_variables is called in
1727      initialise_varia is crucial for reverse control flow.
1728    o modifications in GMRedi to enable stable adjoint
1729      (corresponding modif's in thermodynamics, dynamics)
1730    o added missing hook for sponge layer code in external_forcing
1731    o modified test cost functions
1732    o storing in gad_advection (plus removal of write(0,*)!
1733    o missing headers TR1.h added in convective_adjustment routines
1734    o errorMessageUnit set non-equal zero in eeboot
1735      (conflict on some platforms, e.g. IBM SP3)
1736    o modified carbon verif.
1737    
1738    checkpoint44h_pre
1739    o vertical grid option: allow to put the Interface at the middle between
1740      2 cell-centers ; replace delZ in pkg/kpp by drF.
1741    o GM Advective form: Tracers are advected using the residual transport (=
1742      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1743    
1744    checkpoint44g_post
1745    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1746      results) ; ifdef missing in thermodynamics.F
1747    
1748    checkpoint44f_pre,checkpoint44f_post
1749    o added PTRACERS package
1750      This allows an arbitrary number of passive tracers to be integrated
1751      forward simultaneously with the dynamicaly model.
1752      + Implemented so far:
1753        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1754        - I/O and checkpointing
1755        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1756      + Not implemented so far:
1757        - KPP
1758        - OBCS
1759      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1760        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1761        line in data.pkg.
1762      + This package is disabled by default since it increases storage.
1763    
1764    
1765    o testscript: added -cleanup option
1766    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1767                 b) enable to filter 2D fields.
1768    
1769    checkpoint44e_pre,post
1770    o re-wrote convective adjustment to use pre-calculated weights
1771      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1772      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1773      Original calls to convect() still in place.
1774    
1775    chkpt44d_pre,post
1776    o added missing EXCLUDE_MONITOR flags
1777    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1778      (incompatible typ in MIN/MAX expressions caused problems
1779      on IBM SP3)
1780    o in genmake added variable MAKEDEPEND
1781      plus resetting for case SunOS
1782    o added timer_stats.c routine for IBM SP3
1783    o removed variables in dynamics
1784    !!! I forgot to create tag chkpt44d_pre !!!
1785    !!! But chkpt44d_pre = chkpt44c_post    !!!
1786    
1787    o real fresh water flux implemented with non-linear free-surface.
1788    
1789    chkpt44c_pre,post
1790    o few fix (mask in shap_s2, EmPmR in external_field_load,
1791      USE_NATURAL_BCS in solve_for_P);
1792    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1793    
1794    checkpoint44b_pre/_post
1795    o merge of relevant stuff from the ecco-branch:
1796      - genmake: removed $S64 overwrite for case SunOS
1797      - pkg/exf: update and corrections for field swapping and obcs
1798      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1799                  harmonized between ECCO and MITgcm
1800      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1801                      updated checkpointing_lev... lists for obcs
1802      - model/src: minor changes in forward_step, plot_field
1803                   added directive for divided adjoint in the_main_loop
1804      - pkg/mdsio: added mdsio_gl_slice
1805    
1806    o check parameters & config (chkpt44a_pre,post)
1807    o OBC and NonLin_FrSurf.
1808    
1809    checkpoint44
1810    o fix bug in mom_vi_del2uv
1811    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1812    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1813    o update AIM experiments (NCEP input files)
1814    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1815    o added some stuff for AD
1816    
1817    checkpoint43
1818    o added two new advection tests
1819    o added global 4x4 degree ocean test
1820    o added test of H&S94 with free surface on cube
1821    o some final mods for gradient check, adjoint,...
1822    
1823    checkpoint42
1824      Fixed AD-related problems:
1825    o Store directives up-to-date with re-arranged Adams-Bashforth
1826      (mainly thermodynamics.F)
1827    o New store directives for multi-dim. advection schemes
1828      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1829      * new common block and key passkey
1830      (mainly gad_advection.F)
1831    o Modified store directives for split of dynamics/thermodynamics
1832      for the case ALLOW_KPP
1833    o Cleaned argument list for timestep_tracer.F
1834    
1835    checkpoint41
1836    o re-formatted/added comments in prologues of key subroutines
1837      to work with protex
1838    
1839    checkpoint40
1840    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1841    o added FLT (floats) package from Arne along with demo. experiment
1842    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1843      implementation of forward-in-time forcing terms
1844    o more mods for non-linear free-surface including new variable
1845    o modified multi-dim method to work on cube
1846    o bug fix in KPP (from DM)
1847    
1848    checkpoint40pre9
1849    o added DST advection schemes
1850    o fix MPI bug on SGI's
1851    o modifications for non-linear free-surface
1852    o fixed conditionals for fixed flow/passive tracer only mode
1853    o added tension/strain form of stress tensor
1854    o changes to commenting of arguments for TAF/TAMC
1855    o added/updated many matlab scripts
1856    o added multi-dimensional advection method for tracers
1857      
1858    checkpoint40pre8
1859    o new package rw/
1860      Added method for dumping intermediate local arrays:
1861      mdsio_writetile - same as mdsio_writefield except works from inside
1862                        bi,bj loop
1863      mdsio_writelocal - same as mdsio_writetile except works for local
1864                         arrays
1865      write_local_r? - higher-level wrapper for mdsio_writelocal
1866      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1867      Example given at end of mom_vecinv.F that dumps some local arrays.
1868    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1869      control flux-form versus vector invariant code.
1870      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1871      or genmake -DISABLE ...
1872    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1873      (additional storing is now needed for case vecinv;
1874      currently nothing implemented to switch this storing off
1875      in case fluxform is used since no CPP flag available).
1876    
1877    checkpoint40pre7
1878    o bug fix in dynamics.F
1879      calc_viscosity called before k=1,Nr loop.
1880    o added some #ifdef's ALLOW_PASSIVE_TRACER
1881    o cleaned initialisations in ctrl_map_ini
1882      related to TAF
1883    
1884    checkpoint40pre6
1885    o split dynamics into thermodynamics & dynamics
1886    o corresponding split of calc_diffusivity into
1887      calc_diffusivity, calc_viscosity
1888      (kpp_calc_diff, kpp_calc_visc).
1889    o Added diffkr, kapgm to control variables
1890    o bug fix in gmredi_slope_limit for ldd97
1891    
1892    checkpoint40pre5
1893    o proper initialization of Adams-Bashforth time stepping
1894      + uses forward step for very first step of model (iter=0)
1895    o re-generated *all* output since almost all output is modified by this
1896      change (sorry but we've been putting this one off for about 2 years)
1897      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1898        *not* regenerated since they are already out of date and I don't
1899        want to create the impression that they are suddenly working.
1900    o removed KAP stuff for DEC's
1901    o modified/added many .cvsignore files in */code and */input
1902    o added new expt "solid-body.cs-32x32x1"
1903      + this uses an alternative form of ini_curvilinear_grid.F which
1904        is not necessarily any better than the current one...
1905    
1906    checkpoint40pre4
1907    o added re-initialisations of utrans,vtrans,rtrans in
1908      calc_common_factors which are crucial for TAF.
1909    o extended iMin,jMin range for calc_common_factors,
1910      calc_diffusivity
1911    o added option ALLOW_PASSIVE_TRACER
1912    o a few minor updates and fixes
1913    
1914    checkpoint40pre3
1915    o created calc_gtr1.F for gad package
1916    o split the_main_loop and re-introduced forward_step
1917    o some recomputations of nIter0 for TAMC
1918    
1919    checkpoint40pre2
1920    o Updated to latest branch of AJA, JMC
1921    o Added gradient check package
1922    o Added routines for passive tracer handling
1923    o Added carbon sequestration sensitivity experiment
1924    
1925    checkpoint39
1926     o Modifications and fixes to support TAMC
1927       (mainly missing or wrong directives)
1928     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1929       in addummy_in_stepping
1930     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1931     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1932     o Included following packages:
1933       cal: calendar
1934       exf: external forcing
1935       ecco: essential routines to control use of cal, exf
1936             (NB: this is not the full ECCO environment)
1937     o disabled some packages by default in genmake
1938    
1939  checkpoint38  checkpoint38
1940   o see notes_c37_adj.txt   o see notes_c37_adj.txt
1941   o corrected wrong layer index in external_forcing_t   o corrected wrong layer index in external_forcing_t

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