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revision 1.22 by adcroft, Wed May 26 23:01:16 1999 UTC revision 1.757 by mlosch, Wed Dec 20 12:27:02 2006 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o fix multi-category seaice:
8     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
9       SEAICE_MULTICATEGORY
10     - fix short wave heat flux
11    o Initial check-in of lab_sea adjoint
12      (very similar to natl_box_adjoint/code_seaice)
13      * used C-grid and EVP solver
14      * used KPP, GM/Redi
15      * uses inAdExact=.TRUE.
16      * gradient checks fail for both ADM and TLM
17        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
18        f.d. gradients actually seem more problematic than ADM, TLM gradients;
19        issue is related to forward mismatch between g77 an ifort
20    o pkg/seaice: overhaul of thermodynamics
21     - growth.F and groatb.F are replaced by new routine seaice_growth.F
22     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
23     - move a few global fields out of SEAICE.h into seaice_growth.F and
24       make them 2D (FICE/QNETO/ ...)
25     - remove FO (it is the same as QNETO)
26     - introduce a few local fields to avoid modifying external fields such
27       as atemp, etc.
28    
29    checkpoint58s_post
30    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
31      changed exf_set_gen.F so that
32        genperiod=0 means input file is one time-constant field and
33        genperiod=-12 means input file contains 12 monthly means
34    o CG2D: use pre-computed solver main-diagonal (stored in common block);
35      this affects truncation error ; generate new output file for exp. which
36      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
37        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
38        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
39        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
40        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
41        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
42    o start implementation of deep-atmosphere and anelastic formulation
43    o verification: remove 2nd copy of input files and use script "prepare_run"
44      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
45    o mom_common/vecinv/fluxform: fix a few initialisation isssues
46    o profiles: fix for multithreaded case
47    
48    o diagnostics: rename few diags:
49      s/'PRESSURE'/'RCENTER '/g
50      s/'TICE    '/'oceFreez'/g
51      s/'TAUX    '/'oceTAUX '/g
52      s/'TAUY    '/'oceTAUY '/g
53      s/'SWFLUX  '/'oceQsw  '/g
54      s/DIFx/DFxE/g
55      s/DIFy/DFyE/g
56      and add few ocean-forcing diagnostics:
57      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
58    o modifications to pkg/seaice/growth.F and budget.F, which change results of
59      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
60      as actual snow thickness.  It now refers everywhere to effective snow
61      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
62    
63    checkpoint58r_post
64    o modifications to pkg/seaice/growth.F, which change results of
65      lab_sea experiment: fixes pertain to melting snow over open water, to
66      masking EVAP under sea ice, and to using the correct AREA variable for
67      computations of EVAP, PRECIP, HSNOW, and GHEFF
68    o add ability to read bathy, salt, and theta using MNC (off by def)
69    o add flooding algorithm and advection of HSNOW for pkg/seaice;
70      both are turned off by default and do no change any results
71    o seaice advection with pkg/thsice: a step toward the use of non-linear
72      advection scheme, but #ifdef or commented out for now (requires more EXCH).
73    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
74      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
75      in natl_box (affects results @ truncation level: update output.txt)
76    o multi-threading and IO:
77      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
78      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
79        (needed to work with SingleCpuIO): tested in all verif. exp.
80    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
81      affects the results (but none of the verification test uses this scheme).
82    o Adding some pkg/diagnostics capability to pkg/seaice
83      (will certainly be subject to changes)
84    o ctrl: adding new control variables:
85      lwflux, lwdown, evap, snowprecip, apressure, runoff
86    
87    checkpoint58q_post
88    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
89      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
90      high_res_cube configuration by 4% on Columbia.
91    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
92      add (in global_with_exf/code) a version of EXF_INTERP_READ without
93      dynamical allocation (seems to work in multi-threaded).
94    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
95      single CPU io) so that TAF does not have to see EESUPPORT.h
96    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
97    
98    checkpoint58p_post
99    o obcs: stop if obcs is used with useCDscheme = .true.
100    o shelfice:
101     - fix a sign error so that no slip at shelfice interface works
102     - remove stop for combination non-hydrostatic code and shelfice. That does
103       not mean, that the results are correct, but at least they are numerically
104       stable
105    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
106    o added adjoint exch routined for all exch*3d* routines
107      and updated flow directives
108    
109    checkpoint58o_post
110    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
111      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
112    o change controling S/R for writing pickup file (new S/R do_write_pickup)
113      and clean-up reading/writing of pickup files.
114    o fix local version of read/write pickup (NH part) in rotating_tank/code
115    o simplify EXCH interface:
116     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
117     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
118    o added the regrid package
119    o shelfice:
120     - add a simple boundary layer scheme to reduce noise
121     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
122    
123    checkpoint58n_post
124    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
125       local variable (not in common block).
126    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
127      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
128      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
129        to work with SingleCpuIO.
130    o add "_d 0" to real constant of pkg/cfc subroutines ;
131       update exp. cfc_exemple & tutorial_cfc_offline output files.
132    o multi-threading and IO:
133      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
134        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
135      - barrier before and after reading.
136      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
137      - avoid using MDS_WRITELOCAL for LAND pkg output.
138      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
139        common-block variables ; Allows multi-threading with master-thread IO.
140    o change default MAX_NO_THREADS from 32 to 4 ;
141      and stop cleanly when MAX_NO_THREADS is too small.
142    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
143    
144    checkpoint58m_post
145    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
146       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
147    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
148       keep global_ocean.90x40x15 (for AD testing) with former secondary test
149       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
150    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
151        add MITgcm_tutorials (= code + all the tutorials)
152    o ecco, option to compute cost for total ssh (mean+anom)
153    o consistent with addition of ptracer and ssh in pkg/profiles
154    o profiles: adding ptracer and ssh
155    o testreport: change multi-test output-file name
156      (from output.txt.{name} to output.{name}.txt)
157    o profiles: now ok for mutli-tiles case
158    o seaice: add 4 parameters for different advection schemes for area,
159      (effective) seaice thickness, enthalphy, and snow height. Their default
160      is the standard parameter SEAICEadvScheme
161    o calc_gw:
162     - add cosFacU in zonal viscous flux (harmonic.visc.).
163     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
164       of tutorial_plume_on_slope.
165    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
166    o calc_gw: true flux-form, account for horizontal grid spacing.
167      update rotating_tank results, but not plume_on_slope (affected at
168      truncation level, 11 digits).
169    
170    checkpoint58l_post
171    o calc_gw:
172     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
173     - remove side-drag for now (need to fix it); update plume_on_slope results.
174     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
175    o commit code to make SST/SSS weights spatially variable
176      (based on either variable in-situ or variable initial T/S weights)
177    o pkg/ecco:
178      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
179        now based on horizontally varying weights wthetaLev, wsaltLev
180      * cost_averagesflags now returns year indices in addition to day, month
181      * sflux balance is performed on annual basis
182        (sflxumm, sfluxmm2, bal_sfluxmm)
183      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
184        including separate counting and multipliers
185    o pkg/rbcs
186      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
187    
188    checkpoint58k_post
189    o testreport:
190     - always build in dir. "build" (if not there, mkdir build instead of building
191       & running in input)
192     - run in dir run (if it exists), in build otherwise.
193     - call prepare_run (if input/prepare_run exists)
194     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
195    o pkg/exf modifications to interpolation and rotation routines for more
196       reasonable treatment of North Pole singularity: for tracers North Pole
197       value is set to northernmost zonal-mean value, for zonal velocity it is
198       set to zero, and for meridional velocity it is set to northernmost value.
199    o pkg/exf/exf_check_range.F
200     - add tile index to diagnostics and move stop statement to the very
201       end of the routine.
202    o pkg/diagnostics: (diagnostics_main_init.F)
203      define title of isomorphic variables according to the current config.
204    o pkg/thsice with pkg/seaice dynamics:
205    - fix domain of computation (interior only, required for exf) and do exchanges
206    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
207    o towards a standard way of dealing with multi-threading in MONITOR
208      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
209    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
210       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
211    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
212    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
213    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
214       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
215    o tracer advection:
216     - clean-up and simplify calc_common_factors.F
217     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
218       advection subroutine (but still not used within DST advection S/R)
219    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
220    
221    checkpoint58j_post
222    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
223      from file (collects calls previously in FORWARD_STEP)
224    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
225    o adjoint store dir. adjusted accordingly
226    o genmake2
227      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
228    
229    checkpoint58i_post
230    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
231      on wind stress (SEAICEstressFactor defaults to 1.)
232    o Total number of Timers is finite (<=40): comment out 2 non-essential one
233      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
234    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
235      on CS-grid: no longer loosing mass.
236    o exf & curvilinear-grid: no longer modify longitude xC & xG.
237    o pkg/ggl90: fix sloppy output and fix a bug
238    o pkg/seaice: added SEAICEuseEVPpickup parameter
239      - Set to false in order to start EVP solver with
240        non-EVP pickup files when using SEAICEuseEVP
241      - fix sign error in diffusion in seaice_calc_rhs
242    
243    checkpoint58h_post
244    * Modifications for bottom topography control
245      o replace hFacC by _hFacC at various places
246      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
247      o add non-self-adjoint cg2d_nsa
248      o update autodiff support routines
249      o re-initialise hfac after ctrl_depth_ini
250      o works for 5x5 box, doesnt work for global_ocean.90x40x15
251    * Adding verification for 5x5 box (4-layer) bottom topography control
252    
253    checkpoint58g_post
254    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
255       used for mean seasonal cycle, mean diurnal cycle); add an example
256       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
257    o pkg/ggl90:
258      - add parameter (minimum surface kinetic energy)
259      - fix bug (avoiding division by zero)
260    o couple pkg/thsice to pkg/seaice:
261      - modify advection in seaice to accomodate new scalar fields to be advected
262      - only muliDimAdection scheme work with seaice/thsice
263      - mapping of thsice-variables to seaice-variables, back and forth
264      - does not break the verification experiments, but does not give the
265        desired results either
266    o pkg/seaice
267      - make (default) second order advection a bit less confusing?
268    
269    checkpoint58f_post
270    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
271      to pkg/seaice):
272      - new routines thsice_map_exf and thsice_get_exf provide the interface
273      - add an additional formal parameter to thsice_solve4temp
274    o pkg/exf:
275      - add new fields wspeed, snowprecip (to be able to couple to thsice)
276      - correct Stefan-Boltzmann constant
277      - new parameter for longwave surface emittance
278      - separate some stuff from exf_bulkformulae into new routines  
279        exf_radiation, exf_wind
280      - add new parameters and constants: longwave emissivity for ocean, ice
281        and snow, evaporation parameters over ice
282      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
283        either wind from stress or stress from wind
284    o pkg/thSIce:
285    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
286    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
287       and THSICE_CALC_THICKN
288    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
289    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
290      to make debugging easier.
291    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
292    o pkg/bulk_force:
293      - clean-up comments and parameters ;
294      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
295    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
296      generate new output for test-experiment: aim.5l_cs.thSI
297    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
298      testreport accordingly
299    
300    checkpoint58e_post
301    o SEAICE_CGRID adjoint done
302    o R_STAR adjoint implemented.
303      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
304      * need to sort out init. of h0facc, etc.
305    o Make pkg/profile fully independent of ecco,cost, etc. stuff
306      to be able to use it in pure forward.
307    
308    checkpoint58d_post
309    o upgrade simple test-experiment to tutorial example:
310     step.1: duplicate the experiment and (step.2) will remove the old copy.
311      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
312      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
313      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
314      tutorial_global_oce_biogeo    <- copy of dic_example
315      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
316      tutorial_plume_on_slope       <- copy of plume_on_slope
317      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
318      tutorial_global_oce_optim     <- empty for now (David ?)
319      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
320     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
321    o correct a sign problem in cost_scat.F
322    o obcs and ptracers: fix boundary conditions for advections schemes
323      with larger stencil
324    o thsice adjoint: start
325    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
326      completeness
327    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
328      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
329    o ptracers adjoint:
330      * avoid extensive recomputatations
331      * fix missing re-init. of gptr (missed by TAF)
332    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
333      me to turn off the excessive output to STDOUT that this package produces
334    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
335      and add those terms in Vector-Invariant formulation.
336    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
337      if the control period (xx_hfluxperiod etc) is 0
338    o in profiles pkg, clean routines and fix details
339    o in ecco pkg, reading ssh data:
340      fix problem in case the model does not start at iter0=0
341    o fix mnc-pickup/restart for ptracers
342    o new package prifiles:
343      code to compute profile-based cost by Gael Forget
344      (modifs in ecco, ctrl, autodiff)
345    o Benign bug fix in initialization (spotted by M. Mazloff) of
346      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
347    
348    checkpoint58c_post
349    o adjoint: finish NLFS adjoint and provide reference output in
350      verification/global_ocean.90x40x15/results_ad_nlfs
351    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
352      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
353      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
354      with SEAICE_CGRID defined.
355    o move calendarDumps from "data" to "data.cal" and clean-up the code
356      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
357    o add useEXF & useCAL flags (for now, set in hard-coded way)
358    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
359      (were missing in NH mode, and wrong in quasihydrostatic mode).
360      waiting for Chris updated version of calc_gw to add those CALLs.
361    o fix bug in quasihydrostatic S/R ;
362      add a test for this option: global_ocean.90x40x15.qshyd
363    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
364      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
365    o add on/off flag useOffLine for package OFFLINE
366    o seaice:
367      - modify advection so that it works also on the C-grid
368      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
369        problem in multi-tile runs with C-grid
370      - add flags for clipping ice velocities and/or masking solver forcing
371      - fix drag (ocean on ice) formulation and a bug that caused noise in the
372        C-grid solver
373      - added a few comments to seaice_diffusion.F
374      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
375        are now exclusive)
376      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
377        required re-ordering the code a little:
378       + make DAIRN global variable (defined in SEAICE)
379       + move computation of the viscosities eta and zeta into a new separate
380         routine (because I need to recompute them in seaice_ocean_stress.F)
381    
382    checkpoint58b_post
383    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
384      update output.txt of exp. aim.5l_cs.thSI
385    o various mnc cleanups and improvements:
386      + shrink lookup tables by factor of ~4
387      + better error reporting when running out of lookup space
388      + able to handle longer path/file names (up to 500 chars)
389    o adjoint:
390      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
391      - TBD: "hidden" mom_vecinv recomp. in dynamics
392    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
393     (allow to differentiate between forcing components using new integer flags:
394      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
395     and add new flag to put Dissipation tendency out of Adams-Bashforth.
396    o ecco
397      - enable trend removal from SSH anomaly obs.
398    o adjoint
399      - a fix for PmEpR when #undef EXACT_CONSERV
400      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
401      - try to fix "hidden" recomp. in forward_step for NLFS
402        (NLFS seems broken sometimes after I checked it in)
403    o seaice:
404     - add c-grid version of the dynamic solver:
405       + three new routines that are the c-grid substitute lsr, dynsolver
406         and ostres
407       + put a few fields that were local to dynsolver into global common
408         blocks, so that I can move the computation of stresses etc into
409         seaice_lsr (saves coding but may break the adjoint).
410     - replace more hardwired parameters by runtime parameters
411     - add ice masks that mask the rhs of the implicit solvers where there
412       is no ice (commented out in seaice_dynsolver, because i am not sure
413       if this works properly), eventually this should replace the clipping
414       of ice velocities in seaice_dynsolver to +/-40cm/s.
415    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
416      include it only where its needed
417    o move balancing of fluxes before the call of external_forcing_surf
418    o seaice:
419      - correct units of turning angles (now they are really in degrees)
420      - move computation of GWATX/Y out of main routine into dynsolver
421      - initialize GWATX/Y in seaice_init
422    o Apply mask on Fresh-Water flux (needed for SSH forcing).
423      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
424    o seaice: add runtime flags for turning angles (default to zero)
425    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
426      and trend from exf forcing and ctrl control adjustments
427    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
428      (since checkpoint57x_post)
429    o change the default rotation period to 86164.s = the Earth rotation
430    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
431      and based on a reference stratification. Tested within hs94.cs-32x32x5.
432    o seaice advection: add code for choosing between the default (2nd order
433      central differences) and multiDim advection schemes provided by
434      pkg/generic_advdiff
435    o seaice:
436      - removed all references to SEAICE_GRID.h fields from
437        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
438        (cubed-sphere configuration will change a little)
439      - grid computations in seaice_init are obsolete now.
440      - cleaned up code a little so that is easier to read (hopefully).
441      - added new (better?) discretizations of default advection and diffusion
442        (turn on with SEAICEuseFluxForm)
443      - replace 1 in 3d global fields by kSurface in growth.F
444      
445    checkpoint58a_post
446    o seaice:
447      - bug fix in advect.F
448    o shelfice:
449      - separate shelfice load anomaly from pload (breaks with time
450        dependent forcing), => introduce constant field shelficeLoadAnomaly.
451        Its default is 0., but it may be computed more cleverly from (unknown)
452        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
453        done offline. A good approximation of the pressure load anomaly is
454        necessary to avoid large initial adjustment processes underneath
455        deep-reaching shelfice.
456      - small fix in ISOMIP shelfice_thermodynamics
457      - add more sophisticated thermodynamics of Hellmer (1989), this is
458        now the default
459      - give a few constants more intuitive names
460    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
461      if bulk formulae are used in long integration (especially EmPmR). Turn
462      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
463      if balancePrintMean, the imbalance that is substracted is printed to
464      STDOUT.
465    o fix bug (typo) in obcs_apply_eta.F
466    o add a new package shelfice which enables us to model the circulation
467      underneath shelf-ice with draughts of hundreds of meters.
468     - works
469     - to do: + include improved thermodynamics
470              + check whether kSurfC (from model/inc/SURFACE.h) can be used
471                instead of new field kTopC
472              + can we use topoFile, Ro_surf and existing code in ini_depth.F
473                instead of new field R_shelfIce and new code in ini_depth.F
474                and ini_mask_etc.F?
475              + adjust vertical mixing schemes?
476    o seaice pkg:
477     - add a cpp-flag to include a simple formula for a salinity dependent
478       freezing point of sea water at the surface
479     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
480       meridional stresses are now different (and hopefully correct)
481    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
482       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
483       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
484    o pkg/diagnostics: add options and parameters for regional-statistics
485       diagnostics ; define regions by reading a region-mask from a file
486       (might add other options later)
487    o pkg/bulk_force:
488     - add option and parameters to use AIM surface-flux formulae.
489     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
490       others forcing fields (defined in PARM05, parameter file "data") are loaded
491       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
492     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
493     - use the right EXCH call for uwind,vwind (to work on CS-grid).
494     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
495       and parameters (note: calcWindStress replaces .NOT.readwindstress).
496     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
497    
498    checkpoint58
499    o add "--embed-source" option to genmake2 which, when the supporting
500      tools can be compiled (as determined by genmake2) will turn on the
501      embed_files package which then embeds the entire MITgcm source code
502      (*.[fFhc] + Makefile) used for the build within the executable
503      - requested by CNH but off by default
504      - adds a paltry <9MB to the mitgcmuv executable in most cases
505      - only writes the output when useEMBEDSRC in eedata is true
506    o clean up 3-dim. relaxation codes:
507      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
508      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
509      * Thanks to Tom Haine for testing!
510    
511    checkpoint57z_post
512    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
513      affects output (@ truncation level) of exp. plume_on_slope ; updated.
514    o fix the pickup behavior for obcs in combination with ptracers
515    o fix a bug in ptracers_external_fields_load
516    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
517      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
518    o transfered surface NH pressure to eta field (if exactConserv).
519    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
520         and update lab_sea output.txt file.
521    o completing 3-dim. relaxation code: additional term
522         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
523      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
524      * At compile time, in "EXF_OPTIONS.h" set
525          #define  ALLOW_CLIMTEMP_RELAXATION
526          #define  ALLOW_CLIMSALT_RELAXATION
527      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
528          tauThetaClimRelax3Dim = 15552000.0,
529          tauSaltClimRelax3Dim  = 15552000.0,
530      * 3 cases:
531          1) Use a constant-in-time 3-dim. field
532          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
533          3) Real-time relax. to time-evolving prescribed field
534    o Adding Laplacian-type smoothness constraint on
535      initial and boundary (forcing) controls (ic, bc)
536      * enable at compile-time via
537        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
538      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
539      * Absolute scale somewhat unclear so far
540      * no area weighting was included since no other cost term does so far
541    
542    checkpoint57y_post
543    First step for a NLFS adjoint
544    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
545    o new init. routines for calc_r_star, calc_surf_dr
546    o still need to deal with ini_masks_etc
547    o testreport seemed happy
548    checkpoint57y_pre
549    
550    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
551    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
552    o add new offset feature to offline pkg (plus minor cleanup)
553    o cfc fixes for final year of integration
554    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
555      be in GCHEM_OPTIONS).
556    
557    checkpoint57x_post
558    o fix testreport Pb in multiple test experiment.
559    o cleanup our namelist syntax in verification:
560      - make it more F95 standards compliant (some work still needed)
561      - allows the vast majority of our tests to work with gfortran
562    o Non-Hydrostatic:
563     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
564     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
565    o Allow to apply AB on T,S rather than on AB(gT,gS):
566     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
567     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
568       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
569     - need a "clever" read_pickup to restart from the other AB formulation
570    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
571    o remove some unused variables (reduces number of compiler warnings)
572    o adjoint
573      * Disable useVariableViscosity for adjoint for time being
574        (there are a number of extensive recomputations)
575      * Initialize certain variables needed for adjoint
576    
577    checkpoint57w_post
578    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
579                 fix the singleCpuIO RS version of MDSWRITEFIELD
580       and add a WARNING if using globalFiles=T with multi-processors.
581    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
582      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
583    o tracer advection scheme:
584      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
585       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
586       was not very convenient).
587      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
588       (further tests needed for the implicit DST & Flux-Limiter schemes).
589    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
590      and sRef for convenience, handy, when you want to initialize
591      ptracers in a large domain with a constant non-zero value. Also,
592      untangle ptracers_init.F a little.
593    
594    checkpoint57v_post
595    o change dome exp. to use variable viscosity in side-drag terms.
596    o remove all the files from the cfc_offline test since they are now
597      incorporated into tutorial_cfc_offline which has been producing
598      identical results for a few days of testing
599    o add new parameter: sideDragFactor to enable half-slip-side BC
600      and change side-drag S/R to use viscosity from mom_calc_visc
601      (can switch back by setting sideDragFactor=0.); affects results at
602      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
603       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
604    o vorticity & strain are now computed without masking, to account for
605      no-slip-side BC in variable viscosity calculation ; mask is applied
606      anyway later on, before computing advection/coriolis terms.
607    o modify exp4 to test new obcs support for reading from external files
608      and for passive tracers
609    o fix behavior of ptracers_monitor when monitor output is written to a
610      netcdf-file; still not independent of monitor.F (writes in the same
611      file).
612    o change default value of tRef (put a uniform, meaningful value for ocean
613      & atmos) and initialize sRef (was missing, as Martin mentioned).
614    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
615      to be proportional to enstrophy dissipation length.  Thus,
616       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
617      This is now consistent with Smagorinsky and with the manual.
618    
619    checkpoint57u_post
620    o OBCS and PTRACERS: add open boundary support for passive tracers
621      - either use homogenous (pseudo) v.Neumann conditions or prescribe
622        OB-values from file; this is not different from the way theta and salinity
623        are treated
624      - however, Orlanski-radiation conditions are not supported, and the model
625        will stop if you use pTracers and Orlanski at the same time.
626      - beefed up the rountine obcs_external_fields_load: now only those open
627        boundary values are overwritten with values from files for which there
628        are really files, otherwise the OB-fields remain untouched. This makes
629        it possible to use different OBs at different ends of the domain (as
630        with EXF)
631    o reduce number of exch calls in shap_filt (s2).
632    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
633      truncation level) 4/5 MLAdjust test results (11&12 digits match).
634    
635    checkpoint57t_post
636    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
637    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
638      same truncation, independent of the face number: affects affects several
639      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
640    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
641      note that biharmonic viscosity + no-slip was not tested in any experiment.
642    o fix bug in non-linear free-surf side-drag ; generate new output for
643      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
644    o make mnc honor the writeBinaryPrec flag for most kinds of output
645    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
646    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
647      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
648    o add brackets in multi-terms sum to get same truncation, independent of
649      the face number (manage to get exactly same value of gU,gV at the cs-edge)
650      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
651    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
652      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
653      a maximum grid-scale Reynolds number.  Also, changes all length calculations
654      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
655      Suggested values of viscosity parameters found in mom_calc_visc.
656      Many new viscosity diagnostics available.
657    
658    checkpoint57s_post
659    o Add clearing-house for viscosity calculations, mom_calc_visc and
660      correct numerous bugs in LeithD and Smagorinsky discretizations.  
661      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
662      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
663      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
664      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
665      The Strain-Tension form is now called with useStrainTensonVisc=.true.
666      ViscAhStrain and viscAhTension are now retired.
667    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
668    o In response to JMC's bug report, genmake2 now ignores any soft-links
669      that it finds in the *current* directory when searching for files.
670      Soft-links found in any other source directories will still work as
671      they did before.
672    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
673      a C routine to unlimit the stack size
674    o mnc-ify pkg/aim snapshot vars
675    o mnc-ify pkg/land as requested by Daniel
676    o various changes to mnc including:
677      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
678      - output can now be grouped so that all files within a group
679          change the ITER portion of their names in lock-step together
680      - can now read ("global") PER-FACE (in addition to PER-TILE) files
681          and works with both EXCH1 and EXCH2 (but needs more testing)
682      - writing works for all verification test cases w/ g77 on Linux
683    
684    checkpoint57r_post
685    o make MNC variable initialization happen earlier
686    o add diagnostics for (almost) each term of the momentum Eq.
687    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
688    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
689    o remove MINIMAL_TAVE_OUTPUT option ;
690      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
691    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
692      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
693    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
694    o add time-dependent SST, SSS control
695    o cost terms in ecco/ modularized (new cost_generic.F)
696    o cost_averages routines are modularized (new cost_averagesgeneric.F)
697    o new infrastructure for seaice model vs. obs misfits in seaice/
698      * driver from the_main_loop.F is seaice_cost_driver.F
699      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
700      * gradient check in Exp. 6a of natl_box_adjoint/
701    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
702      (see README file)
703    
704    checkpoint57q_post
705    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
706    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
707      - bug was reported by Jean-Michel and Ian Fenty
708    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
709      update exp. cpl_aim+ocn output.
710    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
711      Needed for high-res. runs with large global files
712      to be able to limit tapelev size
713    o Changed some tests for adjoint:
714      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
715      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
716      * global_ocean.90x40x15/ back to default 3-level checkpointing
717    o Modifications to enable scripted COMMON to MODULE conversion
718      * verification/OpenAD/code/ has necessary scripts and description;
719      * converts, compiles and runs successfully;
720    
721    checkpoint57p_post
722    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
723    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
724      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
725    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
726    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
727      (was already the case for dissipation with mom_vecinv,
728       and also the case for grad.PhiHyd when staggered-timeStep)
729      This will allow to put dissipation out-off the AB time-stepping.
730     Unfortunately, affects truncation error. Update output of exp. that "fails"
731      (cg2d matching number) and leave the others for later: front_relax(10),
732      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
733      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
734    
735    checkpoint57o_post
736    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
737      (2) its ready to be documented during the 20050801 DocFest
738    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
739      for ideal_2D_oce and lab_sea on linux_ia32_g77
740    o set to #undef CTRL_SET_OLD_MAXCVARS_30
741      in global1x1_tot/code_seaice_adj to access indices 32, 33
742      (worth another tag)
743    
744    checkpoint57n_post
745    o adding precip control xx_precip 32
746    o adding swflux control xx_swflux 33
747    o Replacing 10 forcing penalty cost routines by 1 generic.
748    o Implementing partitioning in time-mean and variable adjustment
749      for atmos. state.
750    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
751    o in natl_box_adjoint:
752      * updated exp 1 to 10
753        (but does not have time-mean vs. variable split results yet)
754    o updated global1x1/*_seaice_adj/
755      to incorporate latest changes
756    o enable useSingleCpuIO for mdsio vector routines
757      (applies in particular to tapelev I/O)
758    o removed inefficient K-loop in all active_file*control*.F
759    
760    checkpoint57m_post
761    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
762      and advect_cs (use EXCH-2 and standard cs-32 grid files).
763    o pkg/exch2: filling of face-corner halo regions is optional
764      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
765    
766    checkpoint57l_post
767     tag before updating tutorials (pre-release-2)
768    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
769       for output and interpolation of input fields onto model grid)
770    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
771       Affects results of exp. rotating_tank ; update output.txt.
772    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
773          and taking the square quantity and/or using a fraction-weight field.
774    o fix aim_diagnostics_init.F mate numbers.
775    o add mnc output capability to diagnostics/diagstat and update
776      our cvsignore files for the ACSII output generated
777    
778    checkpoint57k_post
779    o lab_sea now uses diagnostics package and provides a suite of
780      new EXF diagnostics output.
781    
782    checkpoint57j_post
783    o exf
784      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
785        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
786        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
787      * extended diagnostics output
788        - now includes all EXF variables
789        - hs, hl moved to common block
790        - separate S/R for diagnostics, called after ctrl vector is added
791        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
792        - EXFqnet contains true Qnet (i.e. includes qsw)
793      * updated verif. lab_sea, global_with_exf
794      * Rearranging hflux (exf_mapfields -> exf_getforcing)
795        to ensure that diagnostics sees a true EXFqnet
796    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
797    o diagnostics pkg: change pointers so that 1 diagnostic can be used
798      several times with different frequencies.
799    o mnc-ify the thsice package as requested by Daniel Enderton
800      - the monitor--MNC output needs work
801      - many attributes need to be added (most are currently blank)
802    o mnc-ify theaim_v23 package as requested by Daniel Enderton
803      - many attributes need to be added (most are currently blank)
804    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
805    o add Sadourny like discretization to the 4th.O vorticity advection scheme
806    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
807      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
808         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
809    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
810     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
811    
812    checkpoint57i_post
813    o Diagnostics package was changed: diagnostic allocation is now deactivated
814      by setting an empty file name in the namelist (used to be by setting 0 frequency)
815    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
816      add 1rst Order upwind vertical Shear.
817    o add a quick fix for A/B checkpointing in OFFLINE mode
818    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
819      end-run around the C/Fortran linking horror in eesup/src/timers.F
820    o added pkg/runclock: allows user to terminate run based on wall clock
821    o added non-hydrostatic scaling parameter: nh_am2
822    o pkg/my82: futile attempt to make results compiler-independent by adding
823      some "_d 0", etc. no effect.
824    o for mnc output, fill the 'T' coordinate var with myTime and create a
825      separate 'iter' variable for iteration count
826    o pkg/diagnostics:
827      add new capability: output of Global/Regional & per-level statistics ;
828      tested against monitor output (including land & thSIce) on various exp.
829    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
830    
831    checkpoint57h_done
832      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
833      data.diagnostics, data.gchem, data.ptracers) is done.
834    
835    o pkg/diagnostics: prepare for Global/Regional statistics.
836      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
837    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
838      and rename it: DIFFERENT_MULTIPLE
839    
840    checkpoint57h_post
841    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
842    o pkg/diagnostics: change output frequency, now in seconds (instead
843      of Nb of iterations). This requires to change data.diagnostics.
844    checkpoint57h_pre
845    
846    o in mnc, let the user create the output dir if both mnc_outdir_date
847      and mnc_outdir_num are false
848    o add fflags() to pkg/diagnostics which allows one to specify, on a
849      per-file basis, the file precision [default behavior is unchanged]
850    o added diagnostics to pkg/kpp, including computation of mixed layer
851      depth based on a temperature/density criterion
852    o updated verification/natl_box to test the new pkg/kpp diagnostics
853    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
854    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
855    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
856      not mnc -- this mistake was found by JMC and is now corrected
857    
858    checkpoint57g_post
859    o add Adams-Bashforth 3rd Order time stepping:
860      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
861      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
862    checkpoint57g_pre
863    
864    o make lambda[Theta,Salt]ClimRelax spatially varying
865      (default remains spatially uniform constant based on tau)
866    o added new control variables
867      * init. uVel, vVel, etanN
868      * lambda[Theta,Salt]ClimRelax
869    o separate masks used for ctrl_pack/unpack 'from write_grid' output
870      (suggested by G. Forget)
871    
872    checkpoint57f_post
873    o add parameter "baseTime" = model base time = time at iteration zero
874      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
875      account for baseTime shift
876    o move Coriolis arrays from PARAMS.h to GRID.h
877    checkpoint57f_pre
878    
879    o mnc-ifying the seaice package
880    o introduced an alternative length scale calculation for use in the limiting
881      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
882    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
883    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
884      as well as grad(vort3).  Made it compatible with both approximate form
885      for the cubed sphere and full form of these gradients.  Added flag
886      useFullLeith to select between approximate and full form.  
887    o add "d0" in getcon.F to reduce differences between compilers/platforms
888      update output.txt of exp. fizhi-gridalt-hs
889    o change port_rand funtion to allow to set the seed.
890    o fix obscure MNC bug involving conversion between reals and integers
891      - it caused no problems with certain (eg. gcc, ifc) compilers but the
892        new version is now more standards-compliant
893    o adjoint-related modifications
894      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
895      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
896      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
897    
898    checkpoint57e_post
899    o Adding eddy stress controls a la Ferreira et al.
900    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
901    
902    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
903      update output.txt of exp. fizhi-gridalt-hs
904    o add more "Z" dimensions and associated coordinate vars to MNC
905    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
906    o parameter calendarDumps: when set, approximate months (30-31 days) and years
907      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
908      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
909      months and years.  Requires pkg/cal.
910    o diagnostics: add pickup functionality
911      - off by default for backwards compatibility
912      - current version only uses MDSIO -- MNC will be added
913    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
914    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
915    
916    checkpoint57d_post
917    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
918    o modify verification/ideal_2D_oce so that it tests the creation of mnc
919      output from the diagnostics package
920    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
921    o make genmake2 more portable by using ".$FS" instead of ".f" for more
922      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
923    o add coordinate variables to the MNC output from the diagnostics package
924    o change MNC-flags default value: true when useMNC=TRUE
925    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
926      the ability (off by default) to read the grid information using MNC
927    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
928    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
929    o do snap-shot diagnostics at the middle of the time-interval (instead of
930      at the end).
931    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
932      new test for AIM with thSIce + slab-ocean
933    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
934    o move state variable diagnostics to the beginning of the time step ;
935      (note: still needs some work specially for snap-shot diagnostics)
936      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
937    
938    checkpoint57c_post
939    o Change testing option (-ieee) to get closer agreement between g77 & ifort
940    o generate new output.txt files on faulks with g77 & the new -ieee option
941    checkpoint57c_pre
942    
943    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
944      update output.txt of exp. global_ocean.90x40x15
945    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
946      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
947    o add saltFlux(+File) forcing capability with periodicExternalForcing
948    o allow to use pkg diagnostics for GM-Redi & ThSIce output
949    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
950    o improvements for the MNC output from DIAGNOSTICS:
951      - correct handling of the unlimitied dimension
952      - all dims now have associated coordinate variables
953      - variables located at U, V, and Corner ("Z") points are now written
954        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
955        *all* data points are output
956    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
957    o added pkg/seaice/seaice_monitor.F
958    o mdsio_readfield.F can now read files visible only to master MPI process.
959    o pkg/seaice: some test code for ice-modified ocean stress
960    o exf_getffields interpolation defaults to bilinear for all scalar forcing
961      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
962      spurious negative numbers for precipitation and humidity.  Will cause
963      some small numerical differences for integrations using pkg/exf/exf_interp.F.
964    o pkg/ctrl/
965      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
966        May be enabled via doPackDiag
967      *  introduce z-scaling of
968         + gradient (doZscalePack) and
969         + control (doZscaleUnpack)
970    o pkg/mdsio/
971      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
972      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
973    
974    checkpoint57b_post
975    o simplify options in diagnostics_fill arguments (remove weird combinations)
976    o fix MNC coordinate variables so that they now contain per-face index
977      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
978      general, EXCH2 grids are only aligned to a "local" coordinate system
979    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
980    o Implement instantaneous output within pkg diagnostics:
981      setting a negative frequency in data.diagnostics produces
982     "snap-shot" output (as opposed to time-average if freq > 0)
983    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
984      NOTE: change ptracer diagnostics name: use 2 characters to work with
985            more than 9 tracers. Add also diagnostics of advect & diffus flux.
986    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
987      becomes the coordinate variable for the 'T' dimension
988    o add CF-style coordinate variables to MNC
989      - just a first cut:  numbers are meaningless on the cubesphere and
990        missing along the T axis but otherwise it works!
991    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
992    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
993    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
994      this is based directly on what the model compute, so that the content of
995      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
996    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
997    o clean up build options files for SunOS, in particular
998      - remove -traditional from xmakedepend
999      - change -xarch=v9 to -xarch=native for f77
1000      - restore use of make (not gmake)
1001      - add CC=gcc if using g77
1002    o changes per discussion of AM, JMC, & EH3 today:
1003      - move redundant "grid" variables out of "state" -- in preparation of
1004        creating proper CF-style coordinate variables and in recognition
1005        that any/all grid variables can be easily copied (eg. w/NCO) from
1006        the grid files into any of the other NetCDF files
1007      - *always* output grid variables with MDSIO (this will eventually be
1008        changed)
1009      - output MNC grid file if useMNC is true
1010    o every instance of _END_MASTER() has been found and replaced with
1011      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1012      preprocessors
1013    o re-arrange diagnostics pkg initialisation:
1014     - allow each package to extend the available diagnostics list
1015     - add some checking and fix small problems (multi-threaded, ...)
1016     - new S/R diagnostics_fill (replace fill_diagnostics):
1017       look through the short list of active diag. (instead of the long list)
1018       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1019    
1020    checkpoint57a_post
1021    o this set of changes restores TAMC compatibility
1022      tested for global_ocean.90x40x15 adjoint on trough
1023      (what a pain)
1024    
1025    checkpoint57a_pre
1026    o some modifs in tools/build_options for sunos
1027    o call ctrl_pack for ctrl at end for optimcycle=0
1028    
1029    checkpoint57
1030    o add horizontal bi-harmonic viscosity for vertical velocity
1031      - new parameter viscA4W (defaults to viscA4)
1032      - affects only non-hydrostatic code
1033      - to be done: no-slip lateral boundary conditions
1034    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1035    o implement Implicit Vertical advection for pTracers
1036    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1037      (implemented also for implicit vertical diffusion & advection)
1038    o OBCS: extend application of tracer open boundary conditions
1039      to a strip beyond the boundary of width Olx/Oly
1040    o add call monitor to TAF set of required calls (flow directives)
1041      and include in natl_box_adjoint
1042    o untangle a few ifdefs related to cost, ctrl, autodiff
1043      untangel a few ALLOW_ECCO_OPTIMIZATION
1044    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1045      (theta2, salt2 in ecco_cost_weights)
1046    
1047    checkpoint56c_post
1048    o OBCS as control variables
1049      - update ctrl_ad_diff.list, obcs_ad_diff.list
1050      - remove balance of obcs controls from default
1051      - fix index bug nobcs in ctrl_init
1052      - fix dummy fields filen in ctrl_pack
1053      - add dummy weights for obcs
1054    o lsopt: comment out fort.94 output
1055    o optim:
1056      - remove unnecessary header files
1057      - adjusted namelists
1058      - add xerbla.F to Makefile
1059    o exf:
1060      - multiple modifications of exf_check_range
1061      - unit change in exf_init_runoff from [m/year] to [m/s]
1062    o mdsio:
1063      - i/o-vector change debugLevel from debLevA to debLevB
1064    
1065    checkpoint56b_post
1066    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1067      is called from DO_THE_MODEL_IO
1068      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1069      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1070      - clean up PTRACERS_WRITE_TIMEAVE a little
1071    o add another verification experiment that tests both the cfc-pkg and
1072      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1073      reactive tendencies treated inline with regular timestepping
1074    o testreport previously did a lousy job of comparing small numbers, so
1075      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1076      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1077      testreport.
1078    o ptracers_monitor: bug fix for MPI
1079    
1080    checkpoint56a_post
1081    o GCHEM: finish reorganizating the package
1082      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1083        (introduces another 3D-array for each passive tracer, but only if
1084        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1085        gchemTendency is not needed because the timestep is done separately)
1086      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1087      - GCHEM is now---more or less cleanly---separate from PTRACERS
1088      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1089        so clear to me how that should be done in a general way.
1090    o CFC: improve formatting of output in CFC_ATMOS
1091    o PTRACERS:
1092      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1093        that ALL experiments with ptracers enable can be checked. This makes
1094        GCHEM_MONITOR obsolete.
1095      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1096        monitorFreq
1097      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1098    o add PTRACERS (PTR0[1-5]) to testreport output
1099    o exf_check_range:
1100      * default changed to .TRUE.
1101      * will check values for niter0 if debLevA, every timestep if debLevB
1102      * STOP in exf_check_range if 'out of range'
1103      * range chosen generous to allow for potential extema
1104      TBD: a version with stricter range
1105           permitted range would be runtime parameters
1106    o GMredi:
1107      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1108      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1109      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1110    o GCHEM:
1111      - move call to GCHEM_FORCING_SEP, so that it is now called before
1112        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1113      - introduced a useGCHEM runtime flag and applied it everywhere.
1114      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1115        this flag is now only visible within GCHEM-pkg routines.
1116      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1117        be replaced by a 3D array that is computed before thermodynamics; for
1118        this, the tracer ID iTracer had to be included into the parameter list
1119        of ptracers_forcing
1120      - set up forward_step to call gchem_forcing, that will replace
1121        gchem_forcing_int in ptracers_forcing
1122      - cleaning up
1123    o small cleaning of exch2: remove files that are also in eesupp/src
1124    
1125    checkpoint56
1126    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1127    o mnc: cleanup "full" files--fixes out-of-memory problem
1128    o ECCO-GODAE
1129      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1130      * fully merged and updated from SIO code
1131        windstress sign change affects
1132        - exf_inscal_[u/v]stress
1133        - sign of xx_tau[u/v] adjustments
1134        - signs in cost_scat
1135      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1136      * natl_box_adjoint updated and compressed
1137      * 2-level checkpoint switch added
1138        (tested in EXP. 1 of natl_box_adjoint)
1139      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1140    o SVD
1141      * first complete, non-hacked version for SVD calculations
1142      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1143        performed via direct access files admtlm_vector.it????
1144        (via ctrl_[un]pack)
1145      * optimcycle is used for ARPACK iteration counter
1146        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1147      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1148        and add linear transforms where necessary
1149      * controls are initial/final SST, SSS (can be extended; need to check
1150        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1151    o mdsio: filename info to both stderr, stdout
1152    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1153      from sign change
1154    
1155    checkpoint55j_post
1156    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1157      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1158    o add consistent build directories and .cvsignore files to verification
1159    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1160    o make all subroutines 30 or less characters in length for certain older
1161      compilers to work (a thorough search only turns up two routines in
1162      pkg/ptracers)
1163    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1164      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1165    
1166    checkpoint55i_post
1167    o change arrays for total vertical diffusivity (2.D if explicit,
1168      3.D if implicit) ; each ptracer uses its own background value.
1169    o added mnc/NetCDF output capability to ocn_compon_interf
1170      - added bits to verification/cpl_aim+ocn so that it can run on
1171        ITRDA and other clusters without the mpirun "-wd" option
1172    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1173      configuration
1174    o give MNC the ability to create additional files rather than
1175      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1176      - the default is just less than 2GB which is a practical limit
1177        on many systems
1178    o Compute the non-local term using either KPP vertical diffusivity (=default)
1179       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1180    
1181    checkpoint55h_post
1182    o add verification test "vermix"
1183    o remove all the *_ioinc flags and replace with the single global
1184      outputTypesInclusive flag
1185    o allow to set a vertical profile of vertical diffusivity for T & S
1186    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1187    o useMNC moved from data.mnc to data.pkg
1188    
1189    checkpoint55g_post
1190    o Renaming carbon AD experiments to comply with testreport conventions
1191    o Updating adjoint of Held-Suarez hs94.1x64x5
1192    o Fixing directives for non-ECCO forward_step, after ECCO directives
1193      have been fixed to avoid recomp. of do_oceanic_phys
1194      Works well for global_ocean.90x40x15,
1195      but recomp. issue remains for carbon
1196    o Updating adjoint output for natl_box_adjoint after
1197      pkg/ecco has been modified (see taga c55d_post)
1198    
1199    checkpoint55f_post
1200    o rename to timeave_init_fixed
1201    
1202    checkpoint55e_post
1203    o some delicate re-shuffle of store directives to avoid one
1204      extra call of do_oceanic_physics
1205      affects ecco_the_main_loop.F, do_oceanic_physics.F
1206      checkpoint_lev1_directives.h
1207    o NB: this may break global_ocean adjoint temporarily,
1208      but it is clear how to fix it. Will do later, need this now.
1209    
1210    checkpoint55d_post
1211    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1212    o ecco_cost_weights is modified to 1x1 runs
1213    o modifs to allow observations to be read in as
1214      single file or yearly files
1215    o enable to read exf forcing fields as either
1216      single file or yearly files (flag useExfYearlyFields)
1217    checkpoint55d_pre
1218    
1219    o switch between 2-level and 3-level checkpointing
1220    o add ability of MNC to write local and "partial" (eg. 2D slices where
1221      the full 3D field is never actually stored) arrays to NetCDF files
1222      with the correct (that is, the complete multi-dimensional) set of
1223      array indicies
1224      - used in mom_vecinv() to write the diagFreq output
1225      - tested (demonstrated) in verification/aim.5l_cs
1226    o further mnc-ification
1227      - add verification/lab_sea to the list with mnc setups
1228      - fix undefined mnc v-names in cd_code
1229      - add kpp to mnc output (both snapshot and timeave)
1230    o non-hydrostatic code
1231      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1232        in calc_gw.F
1233      - defaults to viscAh
1234      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1235        friction or Leith) in non-hydrostatic mode, as long as there is
1236        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1237    o pkg/cost
1238      extend simple cost functions to treat time mean quantities
1239      (T,U,V) via cost_accumulate_state from cost_tile
1240    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1241        be 2 times larger than the minimum size the advection scheme requires.
1242        now get a perfect conservation of salt in advect_cs test-exp (updated)
1243    o GGL90 (Gaspar's TKE mixed layer)
1244      - add horizontal diffusion of TKE, requires exchanges in
1245        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1246        default. In OPA there is no horizontal diffusion of TKE but the
1247        mixing coefficients are computed from a horizontal average of TKE of
1248        6 points or so. I think that diffusion has a little more physical
1249        justification.
1250      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1251        was in vain)
1252      - mask tke-variable in ggl90_init
1253    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1254    o fix biharmonic diffusion on CS-grid.
1255    o more obcs stuff
1256      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1257        for reading boundary values. This routine is called from
1258        obcs_prescribe_read
1259      - updated obcs_check
1260      - changed sponge layer relaxation parameter units for days to seconds
1261      - turned off sponge layer by default
1262      - changed argument list of OBCS_CALC to myTime+deltaTclock
1263      - fixed about 35 bugs in obcs_external_fields_load
1264    
1265    checkpoint55c_post
1266    o obcs stuff
1267      - new runtime flags useOBCSprescribe, useOBCSbalance
1268      - re-arranged obcs_calc
1269      - moved exf_getobcs to obcs_prescibe_read
1270        obcs_prescibe_read is called after ORLANSKI stuff
1271        and independent of it (executable can contain all).
1272      - updated obcs_check
1273      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1274        These may be necessary only if tangential velocities are
1275        prescribed at OB, not sure, needs testing.
1276    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1277      which simplifies the calls and passes the ifc check-bounds test
1278    
1279    checkpoint55b_post
1280    o add a 2D scalar, Z location, exchange_2 routine.
1281    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1282      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1283      affects advect_cs results (for the wrong reason): update output.txt
1284    o use a more standard discretization for biharmonic viscosity ;
1285     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1286      affects results of dome set-up: update output.txt
1287    o fix gad_advection.F (CubedSphere part), back to version 1.23
1288    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1289    
1290    checkpoint55a_post
1291    o merged code to
1292      * prescribe/read time-dependent open boundaries
1293        (works in conjunction with exf, cal)
1294      * sponge layer code for open boundaries
1295      * each boundary N/S/E/W now has its own CPP option
1296        (healthy for the adjoint)
1297    
1298    checkpoint55
1299    o up-to-date adjoint of previous breaks
1300      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1301      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1302      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1303      - carbon: * remove tr1-related adjoint verification
1304                * add ptracer as control variable
1305    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1306      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1307    
1308    checkpoint54f_post
1309    o in verification/carbin/ remove experiment related to
1310      ALLOW_PASSIVE_TRACER (array tr1 etc)
1311      code_ad/ input_ad/ results_ad
1312    
1313    o add two new packages
1314      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1315        + subject to optimization (memory)
1316      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1317        + subject to reordering (many GOTOs in the original code)
1318        + so far opps is called for every (i,j) point, and then operates in
1319          the vertical; one may want to reorder the scheme in order operate in
1320          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1321          fields)
1322    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1323      - all verification tests compile and run with linux_ia32_g77
1324      - defaults are compatible with current input files--nothing
1325        should change if you were not previously using MNC
1326      - MNC output has been added in numerous places (eg. timeave)
1327        but there are still a few writes not yet do-able with MNC
1328        (this is in progress)
1329      - flags now allow for either/or/both use of MDSIO and MNC and
1330        documentation will soon follow
1331      - numerous small formatting cleanups for ProTeX
1332    o add version info (via BUILD_INFO.h) to MNC and stdout
1333    
1334    checkpoint54e_post
1335    o add two new packages
1336      - pp81 (Packanowski and Philander, 1981), Richardson number and
1337        stratification dependent mixing
1338      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1339      - these scheme operate in a similar manner as KPP (without ghat, of
1340        course), however there is only one diffusivity that is used for both
1341        temperature and salinity (and passive tracers)ç
1342    o add offline package
1343    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1344      provided by Stephanie Dutkiewicz
1345    o genmake2: add ability to search for C compilers and cleanup test output
1346      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1347    
1348    checkpoint54d_post
1349    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1350    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1351      leading to additional shift by 5 days each year of integration
1352       (i.e. leading to considerable offset over the years)
1353    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1354    o start with no AB and no initial filtering (staggerTimeStep):
1355      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1356    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1357      (external loading & cpl import/export stay in forward_step.F)
1358    o update coupling interface to work with new staggerTimeStep
1359    o change MDSIO ptracers_pickup.
1360    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1361    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1362    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1363    
1364    checkpoint54c_post
1365    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1366      this affects (truncation error) output.txt of test-exp:
1367       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1368    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1369    o change Qnet to always be the net heat flux, (+upward).
1370      affects (truncation error) output of natl_box exp.: updated
1371    o define the max number of passive tracers in PTRACERS_SIZE.h
1372    o start to test mnc routinely in exp0
1373    o add sea-ice loading (sIceLoad) as a new forcing field.
1374    
1375    checkpoint54b_post
1376    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1377       impressive on Altix and Opteron systems)
1378    o diagnostics can now write NetCDF files through the mnc package
1379    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1380    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1381    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1382      affects (truncation error) output of lab_sea & natl_box exp.: updated
1383    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1384    
1385    checkpoint54a_post
1386    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1387    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1388    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1389    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1390      + internal_wave (shift in writing cg2d_ini_res)
1391    checkpoint54a_pre
1392    
1393    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1394      - modified verification/lab_sea and natl_box_adjoint accordingly
1395    
1396    checkpoint54
1397    checkpoint53g_post
1398    o prepare splitting of thermodynamics: store convect.counter in common block
1399    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1400      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1401    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1402    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1403    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1404    o restore adjointability
1405    
1406    checkpoint53f_post
1407    o modifications that affect AIM experiment results (update output.txt):
1408      - no advection of S at top interface Nr (pkg/generic_advdiff)
1409      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1410    o AIM pkg:
1411      - include stability function into surf.Flux derivative relative to Tsurf
1412      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1413    
1414    checkpoint53e_post
1415    o merged cylindrical coord configuration
1416    o added rotating_tank experiment
1417    checkpoint53e_pre
1418    
1419    checkpoint53d_post
1420    o faulks upgraded: re-generate output.txt that have changed:
1421       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1422    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1423    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1424    o added Sadourny discretization of Coriolis
1425      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1426      - re-enabled use of omega3 (useAbsVorticity)
1427    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1428      vector-invariant equations
1429      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1430    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1431      hopefully without new bugs
1432      - still to do: biharmonic friction for non-hydrostatic w
1433    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1434    o regenerated output for global_ocean_ebm (using -ieee)
1435    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1436      of mom_common/
1437      - simple re-arrangement of instructions within computing loop
1438    checkpoint53d_pre
1439    
1440    checkpoint53c_post
1441    o new version of coupler for AIM+thSIce and Ocean models
1442     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1443     - land: change Evaporation of snow
1444     - aim with thSIce: fix bug in snow-precip.
1445    o changes to calc_gw.F
1446     - bug fix for w^2 term near the bottom boundary
1447     - (hopefully) improve the lateral slip boundary condtions for use with
1448        partial/looped cells
1449      - because the bug fix changes two verification experiments anyway (exp5
1450        and plume on slope), change the lateral boundary condition from half slip
1451        to the value of no_slip_sides
1452    o ebm package wasnt quite up to the parallel task. Fixed that.
1453    o Adjoint of EBM package + verification
1454      * TLM OK
1455      * ADM not sufficient accuracy yet (needs further testing)
1456    
1457    checkpoint53b_post
1458    o Commiting new energy balance model to repository
1459      * package is pkg/ebm
1460      * verif. is verification/global_ocean_ebm
1461      * references are in ebm_driver.F
1462    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1463    C        Global thermohaline circulation. Part I:
1464    C        Sensitivity to atmospheric moisture transport.
1465    C        J. Climate 12(1), 71-82
1466    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1467    C        Global thermohaline circulation. Part II:
1468    C        Sensitivity with interactive transport.
1469    C        J. Climate 12(1), 83-91
1470    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1471    C        Destabilization of the thermohaline circulation
1472    C        by atmospheric eddy transports.
1473    C        J. Climate 7(12), 1870-1882
1474    o Will need long integration testing.
1475    checkpoint53b_pre
1476    
1477    o created pkg/mom_common in preparation for variable viscosity code
1478    o renamed and split ini_mnc_io
1479    o pkg/land: only liquid water can diffuse or run-off
1480    o AIM using land: soil wetness availability account for snow
1481    o added printMapIncludesZeros to EEPARMS namelist
1482    
1483    checkpoint53a_post
1484    o restore TAMC compatiility for exf_constants.h
1485      (no usage of _d in .h)
1486    o Additional storing in KPP in an attempt to fix
1487      TAMC problem with adjoint of KPP code.
1488      (no success...)
1489      Identical code works fine with TAF.
1490    o Fixed verification/natl_box_adjoint experiments.
1491      Initial conditions for Experiments 4 and 5 are now
1492      set to "SEAICE_initialHEFF=0", which is more reasonable,
1493      and hence gives results closer to that of Experiment 2.
1494      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1495    
1496    checkpoint53
1497    o stable checkpoint with up to date adjoint
1498      TLM tests only run for 1st grdchk at the moment. Its unclear if
1499      this is a code problem or a problem with resetting code for g_
1500      variables that is being autogenerated wrong.
1501      Otherwise:
1502       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1503       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1504         are both still in chaos following their security messes.
1505    
1506    checkpoint52n_post
1507    o various build (mostly genmake2) changes including:
1508      - ability to build/run more easily within Cygwin and MacOS X
1509      - more complicated Makefiles with a stronger dependence on Gnu Make
1510    o pkg/seaice modifications
1511      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1512        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1513        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1514      - changed proxy for geostrophic velocity and updated
1515        verification/lab_sea/results/* accordingly
1516      - removed ADI dynamic solver from pkg/seaice
1517      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1518        they caused a segmentation fault under certain circumstances
1519      - removed unused field WATR
1520    o bug fix in exf-package:
1521      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1522         now reflect that.
1523    o small fixes in the cal-package:
1524      - set reference date to first of January for the 'model'-calendar
1525      - failing of cal_CheckDate in cal_FullDate now actually results in a
1526        warning
1527    o small modifications in exf-package to increase flexibility:
1528      - change climtempfreeze from a constant to a runtime parameter that
1529        is specified in data.exf_clim (default = -1.9)
1530      - introduce runtime parameter windstressmax (default = 2.0) that is
1531        specified in data.exf
1532    o fix in pkg/thsice:
1533      - update Evap (Tsf changes) to be consistent with Latent heat flux
1534      - maintain snow precipitation unchanged (even if Tsf >=0).
1535     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1536    
1537    checkpoint52m_post
1538    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1539      this does not change any of the results, because myIter=0 in swfrac always
1540      lead to jwtype=2 (the default anyway), but the call makes little sense
1541      as a default
1542    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1543    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1544      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1545    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1546    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1547    o extending useSingleCpuIO option to work with new exch2 I/O format
1548      - old-style, missing-tile I/O is still accessible by defining CPP
1549        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1550    o monitor package can write to NetCDF files and/or STDOUT
1551    o fix re-definition bug in MNC_GRID_INIT_ALL()
1552    o doc/api_reference added
1553      - a framework for building an API Reference Manual using all
1554        the "protex" comments embedded in the code
1555      - see pkg/generic_advdiff, pkg/mnc for examples
1556    o MNC:
1557      - make myThid the last argument for all subroutines
1558      - new default for the grid files: NO halos
1559      - add useMNC and other run-time flags
1560      - separate per-file-group handling of the unlimited dimension
1561      - early initialization of MNC w/ flags read at the eeboot stage
1562        and lookup tables set in initialize_fixed
1563      - write all MNC output to a freshly-created directory
1564    o thermodynamics sea-ice (thsice) is now tested with testreport.
1565    o test exp. advect_cs: use the standard cs32 grid ; update output.
1566    o Added functionality to grdchk:
1567      pick global i,j,k position (or nearest wet) where to perform check.
1568    
1569    checkpoint52l_post
1570    o new land formulation:
1571      a) use ground enthalpy as prognostic variable to ensure exact
1572         energy conservation.
1573      b) account for water temperature and for latent heat of freezing
1574         in all processes (rain, run-off, ground storage)
1575      c) compute surface and ground temperature implicitly.
1576    o aim_v23 modification for new land model:
1577      a) Treat separately land / ocean / sea-ice surface fluxes
1578         to allow implicit computation of land & sea-ice surface temp.
1579      b) add snow precipitation.
1580    checkpoint52l_pre
1581    
1582    o fix problem (when 1 tile is empty) in min/max monitor.
1583    o fix bug in timeAve (u,vZetatave in common block)
1584    o no restoring terms under ice for pkg/seaice
1585    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1586    o bug fix for pkg/seaice pickups
1587    o change MNC call locations and add coordinate attributes
1588    o mask vorticity at the corner ; affects global_ocean.cs output
1589    o fix ini_curvilinear_grid ; test CS experiments with mpi
1590    o aim.5l_cs: modify sea-ice fraction input file ; update output
1591    o exf: Adding simple range check routine for exf fields after read
1592    
1593    checkpoint52k_post
1594    o removed top-level directory "diags"
1595      - we migrated these functions to pkg/timeave a long time ago
1596    o fixed bug introduced in pkg/monitor
1597    o accuracy ctrlprec = 32 insuffient for gradient checks using
1598      averaged fields (I/O via cost_averages)
1599      -> use ctrl.h in active_file*.F to control I/O precision.
1600    o paramter list of CALL ADTHE_MAIN_LOOP
1601    o added initial do_the_model_io to ecco
1602    o set all ...Freq to zero after cost_final
1603      taveFreq, dumpFreq, pChkptFreq
1604    o MAIN and ECCO differentiability restored
1605    
1606    checkpoint52j_post
1607    o fix nchklev in tamc.h for global_ocean...
1608    o Bringing flow and store directives up-to-date
1609    o Really weird thing!
1610      call do_the_model_io from the_main_loop with parameters
1611      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1612      TAF places a faulty re-call of initialise_varia
1613      after cost_final call which should not be there!
1614    checkpoint52j_pre
1615    
1616    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1617      error messages
1618    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1619    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1620      debug output
1621    o modfied mdsio_writefield.F to handle non-global files under exch2
1622    o update AIM Cubed-Sphere exp (aim.5l_cs):
1623      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1624    o update AIM Equatorial Channel exp:
1625      use standard aim_v23 pkg and change the SST fields to be more realistic.
1626    o globalFile now works with exch2
1627    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1628      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1629    o limit timeave output for hi-res integrations
1630    
1631    checkpoint52i_post
1632    o removed CPP_EEOPTIONS.h from verification/*/code
1633    o updated the tiling for global_ocean_pressure
1634    checkpoint52i_pre
1635    
1636    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1637      the old pkg/aim).
1638    
1639    checkpoint52h_pre
1640    o shortened offending lines in exch2_send_rx?.template
1641    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1642    o genmake2: add build & execute test for NetCDF code
1643    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1644      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1645    o added useSingleCPUIO flag to monitor.F and mon_out.F
1646    o added temporary hack for sea-ice dynamics on the cube:
1647      metric terms are ignored and it is assumed that
1648      there is no sea-ice on cube faces 1, 2, 4, and 5.
1649    
1650    checkpoint52f_post
1651    o added exch2 cube routines to pkg/exch2
1652    o modified hs94.cs-32x32x5 to use it
1653    o added new grid files to hs94.cs-32x32x5
1654    checkpoint52f_pre
1655    
1656    checkpoint52e_post
1657    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1658      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1659    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1660      to work with implicit vertical advection and AB ;
1661    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1662    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1663     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1664    checkpoint52e_pre
1665    
1666    o fix bug in impldiff when Nr=1 or Nr=2.
1667    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1668    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1669    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1670      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1671    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1672    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1673    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1674    
1675    checkpoint52d_post
1676    o re-tiled many expts to allow comparison in multi-processor mode
1677      - updated output accordingly
1678      - changed hs94.128x64x5 to use intial T from file rather than use the
1679        random number generator
1680    o add infrastructure in model routines for fizhi and gridalt packages
1681    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1682    o changes to permit hi-res, cubed-sphere, configuration
1683      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1684      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1685      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1686        of surface winds for the cube
1687      (A verification experiment, based on global_ocean.cs32x15, but with
1688       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1689       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1690       complete with example surface forcing files and matlab scripts to look
1691       at the output and compare it with that of global_ocean.cs32x15.)
1692    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1693       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1694       to conform to the common rule.
1695    o check-in the first version of the coupler + interfaces for multi-components
1696       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1697       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1698       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1699       - ocean and atmos. share the same horizontal grid (no interpolation).
1700       - exchanges between component and coupler is done in forward_step
1701    o new verification experiment, cpl_aim+ocn:
1702       coupled ocean - AIM atmosphere on cs32 grid.
1703    
1704    checkpoint52d_pre
1705    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1706    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1707    
1708    checkpoint52c_post
1709    o Fixing OPTIONS files for use of exf:
1710      - ALLOW_ECCO not needed
1711      - ECCO_CPPOPTIONS.h should not be included from
1712        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1713        as has been the case in the past
1714      - All cal/exf related options are currently set in
1715        single header file. Should remain so until we
1716        agree on a consistent new policy.
1717    o Removed all CPP options for cal package.
1718      cal has no more CPP options.
1719    o modified STOREs in GAD_ADVECTION
1720    o corrected key comp. for passkey
1721    
1722    checkpoint52b_post
1723    o new version: "thsice" of thermodynamic sea-ice pkg:
1724     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1725     - modify fluxes but do not change theta directly;
1726     - light cleaning of bulk_force pkg (still needed with thsice).
1727     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1728       + output_thsice.txt to test thsice & bulk_force pkgs.
1729    o put back grid & coriolis monitor output.
1730    checkpoint52b_pre
1731    
1732    o call "do_the_model_io" at the beginning (=> dump initial state)
1733    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1734    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1735      (need info on NUMBER_OF_PTRACERS)
1736    o missing PTRACERS headers in some routines
1737    o default tamc.h in pkg/autodiff supposed to crash
1738      to ensure proper customization
1739    
1740    checkpoint52a_post
1741    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1742      - moved surfaceTendencyTice from pkg/seaice to main code
1743      - subroutine FREEZE_SURFACE now limits only surface temperature
1744        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1745        => new output.txt for global_ocean.cs32x15 & global_with_exf
1746      - keep the old version of FREEZE for backward compatibility;
1747        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1748      - corresponding modifs for TAF directives
1749    o added surface flux output variables to TIMEAVE_STATVARS
1750    o time-averaged output for pkg/ptracers
1751    o fix problem with ECCO-related divided adjoint
1752      snapshot file was missing some ad-variables,
1753      but no warning issued by TAF
1754    
1755    checkpoint52a_pre
1756    o some bug fixes for #undef REAL4_IS_SLOW
1757    
1758    checkpoint52 = ecco_c52_e35
1759    o after testing adjoints of checkpoint51u_post
1760    
1761    checkpoint51u_post
1762    o this is the post-merge tag of the ecco-branch
1763      (needs another clean checkout and re-testing)
1764    o various natl_box_adjoint configs and results
1765      but no input fields
1766    o obcs adjoint not yet merged!
1767    o adding ECCO global 1x1 and 2x2 degree configs
1768    o updated/extended some store directives for seaice
1769    o pkg/ecco now containes ecco-specific part of cost function
1770    o top level routines the_main_loop, forward_step
1771      supersede those in model/src/
1772      previous input data.cost now in data.ecco
1773      (new namelist ecco_cost_nml)
1774    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1775    
1776    checkpoint51t_post
1777    o this is the pre-merge tag of the ecco-branch
1778    
1779    checkpoint51s_post
1780    o cleanup: removed various obsolete #define-s
1781    o pkg/grdchk
1782      - renamed 'ph-grd 3' to 'grad-res'
1783      - merged from ecco-branch
1784        (remaining bug fixes for obcs gradient checks)
1785      - additional high-precision output for testreport
1786        (grep for 'precision_grdchk_result')
1787    
1788    checkpoint51r_post
1789    o cleaned up or removed CPP_OPTIONS.h files
1790    o updated results for some of the tests to reflect the new
1791      optfiles (-ieee: -O0 instead of -O3)
1792    
1793    checkpoint51q_post
1794    o cd_code:
1795      - moved cd_scheme.F -> cd_code_scheme.F
1796      - separate read_checkpoint from cd_code_ini_vars.F
1797      - separated cd_code part from write_checkpoint
1798      - updated AD_SOURCE, generated .flow
1799      - added CD_CODE_VARS.h to the_main_loop
1800      - Moving cd_code specific store dir.s to pkg/cd_code
1801    o ctrl package totally restructured
1802      - pack/unpack now optional and decoupled from
1803        xx_/adxx_ I/O
1804      - ctrl_pack/unpack cleaned
1805        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1806      - confined inclusion of AD_CONFIG.h to where necessary.
1807    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1808    
1809    checkpoint51p_post
1810    o create initial cd_code package
1811      - WARNING: the initialization of fields within packages
1812        is broken because INI_FIELDS (where READ_CHECKPOINT is
1813        called) is called *before* PACKAGES_INIT_VARIABLES.
1814        This seems to be backwards since
1815        1) its important to initially zero the entire field including
1816           the "halo" region
1817        2) zeroing needs to be done *before* reading pickup info
1818           and the pickup call might or might not happen in any
1819           particular run
1820      - this needs an overhaul for R2
1821    o cleanup verification/*/code/GMREDI_OPTIONS.h
1822    o cleanup testreport
1823    
1824    checkpoint51o_post
1825    o bringing AD-related verif's up to date with genmake2
1826      - carbon/
1827      - global_ocean.90x40x15/
1828      - hs.94.1x64x5/
1829      - (front_relax/ )
1830    o (more) consistent directory structure for AD-related verif.'s
1831    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1832    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1833    o bug fix in find_alpha.F for MDJWF:
1834      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1835        change rho -> rho-rhoConst
1836      - replace call find_rho to find_rhonum
1837    o initialisation of rFlx extended to full array (required by TAF)
1838      and shifted to thermodynamics
1839    o removed PTRACERS.h in ptracers routine
1840    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1841    o Correcting initialisations for fVerU, fVerV.
1842    o helping TAF to recognize dependency on kUp for
1843      fVerU, fVerV
1844    o Replacing delZ by delR in pkg/ctrl/
1845    checkpoint51o_pre
1846    
1847    o undid all of cp51 pending some cleanups and discussion
1848    o added the [#include "AD_CONFIG.h"] statement to all files that need
1849       it for adjoint/tl #defines
1850     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1851     o removed tools/genmake since it no longer works
1852    
1853    checkpoint51n_post
1854    o modifications to make FREEZE flux visible to pkg/kpp
1855      - moved surfaceTendencyTice from pkg/seaice to main code
1856      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1857      - subroutine FREEZE now limits only surface temperature
1858        (this means new output.txt for global_ocean.90x40x15,
1859         global_ocean.cs32x15, and global_with_exf)
1860    o added surface flux output variables to TIMEAVE_STATVARS
1861    
1862    checkpoint51n_pre
1863    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1864    o added [#include "AD_CONFIG.h"] to all files that use the following
1865      defines:
1866      - ALLOW_ADJOINT_RUN
1867      - ALLOW_TANGENTLINEAR_RUN
1868      - ALLOW_ECCO_OPTIMIZATION
1869    
1870    checkpoint51m_post
1871    o incorporating changes to get TAMC/TAF working in genmake2
1872      - added new TAMC/TAF targets to the Makefile
1873      - various cleanups related to package handling
1874      - these changes should have no impact on the forward model
1875    
1876    checkpoint51l_post
1877    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1878     - faster algorithm for cal_addtime.F
1879     - higher precision arithmetic, where needed
1880     - pkg/exf *startdate variables changed from calendar date to
1881       model integration time
1882    
1883    checkpoint51l_pre
1884    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1885    o enable to apply restoring on S & T only in a latitude band.
1886    o update output (external_forcing_surf modif. change truncation errors)
1887       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1888    
1889    checkpoint51k_post
1890    o change default to: useNHMTerms=.FALSE.
1891     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1892       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1893     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1894        exp1, ideal_2D_oce
1895     - change data file of oceanic exp (leave the results unchanged for now)
1896       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1897    o set gravitySign automatically according to the vertical coordinate used
1898      (and change sign: back to "logical" value: +1 when R increases downward)
1899    o added an include barrier to the default CPP_OPTIONS.h and
1900      removed the #include "PACKAGES_CONFIG.h" from it
1901    o fix a bug in mom_fluxform (from chk51j_post)
1902    
1903    checkpoint51j_post
1904    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1905    o adjusted some flow directives (dynamics, thermodynamics)
1906    o added cubed-sphere case to test cost function
1907    o heckpoint_lev?_directives.h now include
1908      pkg-specific directives, whenever those are enabled.
1909    o Moving pkg-specific flow directives to corresponding pkg
1910      Moving pkg-specific differentiation list to corresponding pkg
1911      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1912      ---> conventions are
1913           - pkg_ad.flow
1914           - pkg_ad_diff.list
1915           - pkg_ad_check_lev?_dir.h
1916    
1917    checkpoint51i_post
1918    o merge of the branch-genmake2
1919      - knowingly breaks the older genmake
1920      - automatic generation of all ALLOW_${PKG_NAME} defines
1921      - new testreport supersedes older testscript
1922    o large number of package inclusion and header cleanups
1923    checkpoint51i_pre
1924    
1925    o new output for adjoin of global ocean vector invariant
1926    o fix for checkpoint of thermodynamic seaice and bulk_force
1927    o Steph gchem various cleanups
1928    
1929    checkpoint 51h_pre
1930    o fixed some single quotes
1931    o modify gchem pkg to be more versatile
1932    o modifications to clean up dic pkg
1933    o add pkg/cfc
1934    
1935    checkpoint51g_post
1936    o provide links for ARPACK and ADM*TLM
1937    o start removing verification/vero/
1938    o update AD-related stuff
1939      (in particular some IF-statements in model/src/ routines)
1940    o adding to verification/global_ocean.90x40x15/ adjoint of
1941      vector invariant setup
1942    
1943    checkpoint51f_post
1944    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1945    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1946      of tracer Green's fucntions for ocean inversion project.
1947    
1948    checkpoint51f_pre
1949    o Added on-the-fly spatial interpolation capability
1950        "USE_EXF_INTERPOLATION" to pkg/exf.
1951      - This is a temporary Cartesian-grid hack until
1952        the super-duper ESMF coupler becomes available.
1953      - See verification/global_with_exf/README for usage example.
1954      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1955        flags and modified pkg/seaice accordingly.
1956    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1957        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1958        non-local transport term.
1959    
1960    checkpoint51e_post
1961    o pkg/mom_vecinv:
1962      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1963      - add time-ave diagnostic of vorticity advection.
1964    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1965    o atmospheric geopotential: - include water vapor effect;
1966                                - use p^kappa in p* scaling.
1967    o land pkg: read initial state from files.
1968    o AIM : add stratospheric drag in the upper level
1969    
1970    checkpoint51d_post
1971    o change function ILNBLNK (=> last non-blank char.) to return zero
1972      (instead of the string length) when the string. char is empty
1973    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1974    o modif's to restore TAMC compatibility
1975      - avoid "_d" constructs in PARAMETER declarations
1976      - avoid interrupting lines by comment lines
1977    o Use cluster local disks for purely local I/O
1978      vs. globally visible disks needed for ctrl stuff
1979      (merged from ecco-branch)
1980      - new active_file_loc... and mdsio_..._loc routines
1981      - affected packages: autodiff, ctrl, grdchk, mdsio
1982    
1983    checkpoint51c_post
1984    o introducing integer flag debugLevel
1985      - debLevZero: suppress all output
1986      - debLevA: standard
1987      - debLevB: equivalent to current debugMode=.TRUE.
1988    o introducing pathname variable mdsioLocalDir for mdsio
1989      that can be specified at runtime
1990      (relevant for cluster I/O to local disk)
1991    `
1992    >>>checkpoint51b_post
1993    adjoint of ptracers
1994    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1995    o extended state in checkpoint_lev?, etc.
1996    o alternative ctrl/cost with tr1 or ptracer
1997    o new comlev1_bibj_ptracers
1998    o new ptracers.flow
1999    o made ptracers_forcing same as external_forcing_s
2000    o added verification for adjoint with ptracers
2001      - adm. grdchk fail so far
2002      - tlm. grdchk OK
2003      - checked tapelev/comlev recomputations: OK
2004    <<<checkpoint51b_pre
2005    
2006    checkpoint51a_post
2007    o added code for biogeochemistry package
2008      - new pkgs: dic, gchem
2009      - new subroutine in ptracers
2010    o modify code for biogeo packages
2011      - in model/src and pkg/ptracers
2012    
2013    checkpoint51
2014    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2015      - autodiff, ctrl, exf, grdchk, seaice
2016      kept separate packages
2017      - cost, ecco, obcs
2018    o updating verification/internal_wave, verification/lab_sea
2019      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2020    
2021    checkpoint50i_post
2022    o Preparing next differentiable checkpoint and sync
2023      of MAIN vs. ecco-branch
2024      - 1st step: this one is differentiable
2025      - 2nd step: next(! not this) checkpoint will have updated packages
2026                  from ecco-branch)
2027    
2028    checkpoint50h_post
2029    o new package "land": provide surface BC for AIM.
2030    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2031    o AIM: use true log-P extrapolation for near surface temp (= as in
2032        F.Molteni paper) ; update aim.5l_cs output.
2033    o New variable in PARM03 for more flexible pickups
2034    o somewhat cleaned package initialisation sequence for
2035      ctrl/ cost/ ecco/ in packages_... routines
2036    
2037    checkpoint50g_post
2038    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2039      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2040      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2041        made the default because of faster convergence than ADI
2042    
2043    checkpoint50f_post
2044    o exf totally restructured
2045      - replaced all exf_set_ routines by one generic exf_set_gen.F
2046        and made sure it's still differentiable
2047      - split exf_getffields.F into new exf_bulkformulae.F
2048      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2049      - updated adjoint/makefile and relevant verif. accordingly
2050    
2051    checkpoint50f_pre
2052     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2053          + change Evap over land. (update aim.5l_cs output)
2054     o added missing .cvsignores and made uniform across expts
2055     o changed configuration of tidal_basin_2d expt
2056     o added pkg/debug functions for tracing code in fatal crashes
2057     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2058     o new fn in pkg/monitor to stop model if solution grows too big
2059     o removed lots of single quotes from comments
2060    
2061    checkpoint50e_post
2062    o make KPP work with PTRACERS
2063     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2064       nearly a copy of kpp_transport_s
2065     - there is no analogue to SurfaceTendencyS, so I have to use
2066       gPtr(of the surface layer) instead
2067    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2068    checkpoint50e_pre
2069    
2070    checkpoint50d_post
2071    o change kpp output from multiple-record state files to single-record state
2072      files analogous to write_state.F
2073    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2074      analogous to the cg2d-related output.
2075    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2076      so that writing to internal file fn (with length 512) fails.
2077    checkpoint50d_pre
2078    
2079    checkpoint50c_post
2080    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2081    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2082    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2083    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2084    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2085    
2086    checkpoint50c_pre
2087    Merging from release1_p13:
2088    o bug fix for pkg/seaice dynamic solver
2089    o Added SEAICE_initialHEFF to pkg/seaice
2090    
2091    checkpoint50b_post
2092    o store u*,v* in gU,V instead of in guNm1,gvNm1
2093    o in order to put the momForcing out of the Adams-Bashforth:
2094      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2095      to timestep.F
2096    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2097    o re-generate output for highly sensitive test-exp:
2098       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2099    
2100    checkpoint50b_pre
2101    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2102    o corrected CPP option mismatch in exf_Bulk... functions for case
2103      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2104    
2105    checkpoint50a_post
2106    o Bug fix for merging between c50 and KPP.
2107      ikey was passed from thermodynamics to kpp_calc via
2108      common block rather than being recomputed in kpp_calc,
2109      in contradiction with new key itdkey.
2110      New key ikppkey created, and tamc.h headers updated.
2111    
2112    checkpoint50
2113    - 2nd step of merge with ecco-branch:
2114      merge changes in ecco-branch back into main trunk
2115    - bug fix in find_alpha
2116    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2117    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2118    - merged some sliced AD support routines
2119    
2120    checkpoint49
2121    merged from ecco-branch:
2122    o exf:
2123      - Enable initialisation of forcing fields to constant
2124        (runtime) values.
2125      - in exf_getffields.F
2126        Reduce i-/j-loop to interior domain, discarding overlaps.
2127        That also fixes wrong TAF-key computations for key_1, key_2
2128        with bulf formulae.
2129      - exf_init.F modify #ifdef for exf_init_evap
2130      - exf_getffieldrec.F, ctrl_getrec.F
2131        The following INT-usages are not safe:
2132          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2133          fldcount = int(fldsecs/fldperiod) + 1
2134        and were modified.
2135    o autodiff: checkpoint_lev...
2136      - updated storing for bulk formulae (some arrays were missing)
2137      - added state for seaice package
2138      - synchronized with main branch
2139    o DIVA:
2140      Modif.s in
2141      - the_main_loop.F
2142      - the_model_main.F
2143      and added cost_final_restore.F cost_final_store.F
2144      o With these changes, it is possible to fully separate
2145        the first forward run to compute the cost function (mdthe_main_loop)
2146        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2147        into separate model executions.
2148        This enables better tuning of DIVA to given queue sizes.
2149      o Loss of cost function value in consecutive DIVA runs is
2150        fixed by storing to 'costfinal' file.
2151      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2152        beginning/end of adjoint integration is accounted for.
2153      The current changes apply to TAF-1.4.26.
2154      TAF has one remaining bug, requiring one manual change
2155      (see MITgcm manual).
2156    o cal: synchronized between MAIN and ecco-branch
2157    
2158    checkpoint48i_post
2159    o Changes to restore differentiability of code w.r.t. previous tag
2160      (mostly adding new routines to make list and replacing
2161      pressure by totPhiHyd).
2162    o Updated and merged grdchk package
2163      - has both ADM and TLM checks
2164      - works for single- and multi-proc.
2165      - output cleaned
2166      - worked successfully for parallel DIVA
2167    o genmake:
2168      - Adding -platform=SP4
2169      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2170    o Modif. for DIVA:
2171      ctrl_unpack should not be called in intermediate DIVA interval.
2172      (similar thing would apply for active files such as
2173      tbar, sbar, psbar, which should not be reinitialised;
2174      only relevant for ecco-branch)
2175    
2176    checkpoint48h_post
2177    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2178    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2179    o Added SEAICE_initialHEFF to pkg/seaice
2180    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2181    
2182    checkpoint48g_post
2183    --- EOS:
2184    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2185      store total Potential in totPhyHyd for diagnostics & EOS.
2186    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2187    --- Pressure/geopotential gradient:
2188    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2189    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2190      ( changes results of global_ocean_pressure )
2191    o NLFS + z-coord.: add eta*Rho' contribution.
2192    o accurate phiHyd when using interface-W at the middle between 2 centers
2193     ( changes results of ideal_2D_oce )
2194    o includes r* 2nd term in potential gradient.
2195    
2196    checkpoint48f_post
2197    Merging from release1_p12:
2198    o Modifications for using pkg/exf with pkg/seaice
2199      - improved description of the various forcing configurations
2200      - added basic radiation bulk formulae to pkg/exf
2201      - units/sign fix for evap computation in exf_getffields.F
2202      - updated verification/global_with_exf/results/output.txt
2203    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2204      (SBO) core products, including oceanic mass, center-of-mass,
2205      angular, and bottom pressure (see pkg/sbo/README.sbo).
2206    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2207      to avoid negative values in shallow regions.
2208      - updated verification/natl_box/results/output.txt
2209      - updated verification/lab_sea/results/output.txt
2210    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2211    o Added useSingleCpuIO option (see PARAMS.h).
2212    o Updated useSingleCpuIO option in mdsio_writefield.F to
2213      work with multi-field files, e.g., for single-file pickup.
2214    o pkg/seaice:
2215      - bug fix in growth.F: QNET for no shortwave case
2216      - added HeffFile for specifying initial sea-ice thickness
2217      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2218    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2219      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2220    o pkg/seaice:
2221      - adjoint-friendly modifications
2222      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2223    
2224    checkpoint48e_post
2225    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2226    o dynamics: change definition of computational domain & adapt mom_fluxform
2227      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2228    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2229        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2230        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2231        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2232        inverted_barometer solid-body.cs-32x32x1
2233      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2234    
2235    checkpoint48d_post
2236    o in preparation for r*:
2237     a) use pre-computed gradient of hydrostatic potential:
2238        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2239     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2240        => affects results of glob_oce_pressure (different truncation error)  
2241      update output.txt of ideal_2D_oce & global_ocean_pressure
2242    
2243    checkpoint48d_pre
2244    o in preparation for r*:
2245      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2246      pass the 2 comp. of the grad. as arguments to momentum S/R.
2247      but for the moment, only used if it does not change the results.
2248    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2249    
2250    checkpoint48c_post
2251    Modifications in treatment of initial flux forcing controls
2252    to avoid extra storing of flux fields.
2253    
2254    checkpoint48c_pre
2255    o Added tidal_basin_2d experiment (currently 1D!)
2256    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2257    
2258    checkpoint48b_post
2259    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2260     (modification to pressure gradient not yet implemented)
2261    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2262      (for U & V) that are used for vertical advection of momentum.
2263    
2264    checkpoint48a_post
2265    o In preparation for r*, use temp. array to compute vertical transport
2266       in flux-form momentum pkg. => change results of few test-exp.
2267      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2268                        lab_sea, natl_box & plume_on_slope
2269    
2270    checkpoint48
2271    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2272    
2273    checkpoint47j_post
2274    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2275    o moved adexch from forward_step to addummy_in_stepping
2276    o added exch in ctrl_map_...
2277    o aveFreq.=0. at end of cost_final to avoid overwrite in
2278      reverse checkpointing loop
2279    o Yet more changes in gmredi:
2280      * adgmredi_calc_tensor
2281        avoiding all recomputation of gmredi_slope_limit
2282      * adgmredi_x/y/rtransport
2283        added flag for excessive storing to avoid recomp. of
2284        u/v/rtans, dTdx/y/z
2285        -> this is not really necessary and very memory-consuming
2286      * adgmredi_slope_psi:
2287        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2288      * gmredi_slope_limit
2289        re-activated full calculation of taperfct for case 'ac02'
2290    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2291    
2292    checkpoint47i_post
2293    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2294    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2295      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2296    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2297    o gmredi: fix few bugs.
2298    
2299    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2300    This will be a good checkpoint to plug into the ecco-branch.
2301    o few modif.'s to get latest version adjointed
2302      (mainly kick out code in ini_linear_phisurf)
2303    o modif's to run adjoint with exactConserv
2304    o case GM_BOLUS_ADVEC should be cleaned
2305      S/R gmredi_slope_psi should be cleaned
2306    o verification/carbon now has exactConserv=.TRUE.
2307    
2308    checkpoint47g_post
2309    o time-average AIM output: becomes independent from statvars time-average
2310      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2311    o After TAF bug fix:
2312      Tested adjoint of gmredi package.
2313      Tests were done with checkpoint47 rather than with latest
2314      checkpoint47f_post since the latter is broken for the adjoint
2315      verification/carbon/ contains both ADM and TLM gradient checks.
2316    Here they are, before they get changed/lost/stolen.
2317    Mostly modif.'s to fix numerical sensitivities.
2318    Gradient checks OK for
2319    - GM_taper_scheme:
2320      * clipping
2321      * ac02
2322      * linear
2323      * glw91
2324      * dm95
2325      * ldd97
2326    - GMREDI_OPTIONS:
2327      * GM_VISBECK_VARIABLE_K
2328      * GM_NON_UNITY_DIAGONAL
2329      * GM_EXTRA_DIAGONAL
2330      * GM_BOLUS_ADVEC
2331    in conjunction with data.gmredi parameters to be checked in
2332    in a few minutes under verification/carbon/code/
2333    
2334    checkpoint47f_post
2335    Merging from release1_p10:
2336    o modifications for using pkg/exf with pkg/seaice
2337      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2338        and SEAICE_EXTERNAL_FLUXES
2339      - pkg/exf CPP options EXF_READ_EVAP and
2340        EXF_NO_BULK_COMPUTATIONS
2341      - usage examples are Experiments 8 and 9 in
2342        verification/lab_sea/README
2343      - verification/lab_sea default experiment now uses
2344        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2345    
2346    checkpoint47e_post
2347    o created a tag prior to creating a branch
2348    
2349    checkpoint47d_post
2350    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2351      at the bottom boundary had an erroneous half slip boundary condition
2352    o added bottom drag and no slip boundary condition capabilities to
2353      oceanic pressure coordinates code
2354    o added new verification experiment global_ocean_pressure, this experiment is
2355      also described in the tutorial section of the manual
2356    checkpoint47d_pre
2357    
2358    checkpoint47c_post
2359    o Added a verification experiment for a global cubed-sphere ocean run
2360      -  verification/global_ocean.cubed32x32x30
2361      -  uses pkg/therm_seaice and pkg/bulk_forcing
2362    
2363    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2364    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2365      when using P-coordinate; only implemented for atmospheric config.
2366    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2367      NOTES: requires option NONLIN_FRSURF to be "#define".
2368    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2369    
2370    checkpoint47b_post
2371    Merging from release1_p9:
2372    o pkg/seaice
2373      - removed GOTO's and added taf directives
2374      - double precision constants to reduce the g77 (Linux)
2375        to F77 (SGI) differences reported in release1_p8
2376    o tools/genmake
2377      - added SGI options
2378    o verification/testscript
2379      - updated to that of checkpoint47a_post
2380    o verification/global_ocean.90x40x15/input/eedata
2381      - modified for SGI f77 compatibility
2382    o verification/lab_sea
2383      - added description of sea-ice model
2384      - added missing matlab routines
2385      - added test of thermodynamics parallelization
2386    
2387    checkpoint47a_post
2388    o new pkg: aim_v23
2389     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2390       for now, keep the same surface forcing as before.
2391     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2392     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2393     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2394    o add diagnostic of surface correction term in monitor output
2395    
2396    o bulk_force and therm_seaice
2397    - Two packages:  bulk_force (Bulk forcing)
2398      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2399    - Earlier integration from Stephaine Dutkiewicz
2400      and Patrick Heimbach.
2401    - Two ifdef statements for compile time,
2402       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2403    
2404    checkpoint47
2405    differentiable version of checkpoint46n_post
2406    o bug fix in quasihydrostaticterms
2407    o * "clean" adjoint code (in terms of extensive recomputations)
2408        can now be obtained for all GMREDI options (i.e. for
2409        - GM_VISBECK_VARIABLE_K
2410        - GM_NON_UNITY_DIAGONAL
2411        - GM_EXTRA_DIAGONAL
2412        - GM_BOLUS_ADVEC )
2413      * However, wrong gradient check problem remains unsolved.
2414      * New CPP options have been introduced for different
2415        tapering schemes
2416    o external_fields_load now part of differentiation list
2417    o pressure needs multiple storing;
2418      would be nice to have store_pressure at beginning or
2419      end of forward_step, e.g. by having phiHyd global (5-dim.)
2420      (NB: pressure is needed for certain cases in find_rho,
2421      which is also invoked through convective_adjustment).
2422    o recomputations in find_rho for cases
2423     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2424    o #define ATMOSPHERIC_LOADING should be differentiable
2425    o ini_forcing shifted to begining of initialise_varia
2426    o Incorporating QNVS line search routines into MITgcm
2427      (this is separate code, and therefore not under pkg)
2428      lsopt/, optim/
2429    o Updated verification/carbon/
2430      - #define GM_VISBECK_VARIABLE_K
2431      - GM_taper_scheme    = 'ldd97'    
2432    
2433    checkpoint46n_post
2434    Merging from release1_p8:
2435    o verification/natl_box:
2436      updating new external_fields_load routine
2437    o New package: pkg/seaice
2438      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2439      The sea-ice code is based on Hibler (1979-1980).
2440      Two sea-ice dynamic solvers, ADI and LSR, are included.
2441      In addition to computing prognostic sea-ice variables and diagnosing
2442      the forcing/external data fields that drive the ocean model,
2443      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2444      The implied surface heat flux is then stored in variable
2445      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2446      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2447      non-local transport term.  Because this call precedes model
2448      thermodynamics, temperature under sea-ice may not be "exactly" at
2449      the freezing point by the time theta is dumped or time-averaged.
2450      N.B.: fairly large differences in accuracy occur across
2451            different platforms/compilers; comparison between
2452            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
2453            generated output gives:
2454       T           S           U           V
2455      C D M    c        m  s        m  s        m  s        m  s
2456      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
2457      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
2458      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
2459    
2460      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
2461    o GAD:
2462      - generated new common blocks to account for call of
2463        same gad routines with differing traceridentities
2464        (needed to modify tracerIdentity indices in GAD.h)
2465      - generated separate common blocks for case useCubedSphereExchange
2466        (Department of Futurology)
2467      - parameter lists to gmredi_?transport: added tracerIdentity
2468      - added new key indices to tamc.h
2469    o external_fields_load:
2470      - added this routine to TAF list
2471      - needed to make some common blocks global and additional storing
2472        along the same lines as exf package (checkpoint_lev?_directives.h)
2473    o exf:
2474      updated external forcing package
2475      - bug fixes carried over from ecco-branch
2476        (missing OBCS_OPTIONS.h in two routines)
2477      - enable easy to use "no forcing".
2478      - added exf I/O for atmospheric loading
2479      - added exf I/O for runoff data
2480      - transfered scaling between exf <-> MITgcm to exf namelist
2481    o Adding new verification experiment global_with_exf.
2482      This verification experiment is almost identical to the
2483      global_ocean.90x40x15 experiment, except that it uses
2484      the exf (and cal) package instead of the
2485      external_fields_load routine (cf README file).
2486    
2487    checkpoint46m_post
2488    o modified testscript to return -- when there are no lines of "%MON" output
2489    o added new flag "quasiHydrostatic" for QH mode
2490      and new routine quasihydrostaticterms()
2491    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
2492      New routine: mom_u_coriolis_nh()
2493    o fixed sign of non-hydrostatic metric terms in u and v equations.
2494      Depend on correct sign of gravitySign.
2495    o added work.pc* to .cvsignore in aim directories using ifc
2496    o introduced flag for controllin non-hydrostatic metric terms
2497    o removed gravitySign from PARM04
2498    o switched to g77/ifc from pgf77 in aim experiments
2499    
2500    checkpoint46l_post
2501    o made convective adjustment work with pressure coordinates:
2502     - changed the direction of k-loop in convective_adjustment.F for the
2503       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
2504     - adjusted the reference pressure k-index in convective_adjustment.F
2505     - adjusted the convection condition in convect.F (in analogy to
2506       calc_ivdc.F)
2507     - convective_adjustment no longer computes anything on the halos
2508     - removed the warnings about negative salinity from find_rho.F and
2509       find_alpha.F; instead the new routine look_for_neg_salinity, called
2510       at the beginning of find_rho, find_alpha, and find_beta, does a
2511       check of the entire slice, if CPP-option
2512       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
2513    checkpoint46l_pre
2514    
2515    checkpoint46k_post
2516    o fixed the verification/global_ocean.90x40x15 experiment:
2517     - new bathymetry (the world according to A., JMC, and M.)
2518     - new initial fields and forcing fields (*.bin files)
2519     - new POLY3.COEFFS (for the next release one should switch to a full
2520       equation of state: JMD95P or MDJWF)
2521     - fixed several errors and redundancies in the data file
2522     - experiment uses looped cells
2523     - added matlab directory with diagnostic scripts for plotting of output
2524    
2525    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
2526     - read AIM physics parameters from a file (data.aimphys)
2527     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
2528    
2529    checkpoint46j_post
2530    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
2531    o move wVel computation at the end of the time step, in S/R integr_continuity
2532    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
2533    o update timeave pkg for wVel diagnostic.
2534    checkpoint46j_pre
2535    
2536    checkpoint46i_post
2537    o Clean up AIM package (and keep the results unchanged):
2538      include CPP_OPTION and use IMPLICT NONE in all routines ;
2539      declare all the variables _RL ; use _d 0 for all numerical constants.
2540      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
2541    
2542    checkpoint46h_post
2543    o cleaned up the use of rhoNil and rhoConst.
2544      - rhoNil should only appear in the LINEAR equation of state, everywhere
2545        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
2546        and the dynamical equations are all divided by rhoConst
2547    o introduced new parameter rhoConstFresh, a reference density of fresh
2548      water, to remove the fresh water flux's dependence on rhoNil. The default
2549      value is 999.8 kg/m^3
2550    o cleanup up external_forcing.F and external_forcing_surf.F
2551      - can now be used by both OCEANIC and OCEANICP
2552    checkpoint46h_pre
2553    
2554     Added code to convert surface volume flux (fresh water) into
2555     a mass flux when using P coordinates in the ocean (OCEANICP).
2556     Note: It assumes you have set rho0=rhoConst=density of fresh water.
2557    
2558    checkpoint46g_post
2559    o Include a new diagnostic variable phiHydLow for the ocean model
2560      - in z-coordinates, it is the bottom pressure anomaly
2561      - in p-coordinates, it is the sea surface elevation
2562      - in both cases, these variable have global drift, reflecting the mass
2563        drift in z-coordinates and the volume drift in p-coordinates
2564      - included time averaging for phiHydLow, be aware of the drift!
2565    o depth-dependent computation of Bo_surf for pressure coordinates
2566      in the ocean (buoyancyRelation='OCEANICP')
2567      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
2568        Theta, Salinity, and Pressure in the parameter list. This routine is
2569        presently contained in find_rho.F. This routine does not give the
2570        correct density for 'POLY3', which would be a z-dependent reference
2571        density.
2572    o cleaned up find_rho
2573      - removed obsolete 'eqn' from the parameter list.
2574    o added two new verification experiments: gop and goz
2575      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
2576    checkpoint46g_pre
2577    
2578    checkpoint46f_post
2579    o Enable tangent linear (forward mode) gradient checks:
2580      - extended active file handling to g_... files
2581      - added TANGENT_SIMULATION to theSimulationMode
2582      - extended grdchk package accordingly
2583    o added tangent linear setup in verification/carbon/code_ftl
2584    o added adjoint setup in verification/front_relax/code_ad
2585    
2586    checkpoint46e_post
2587    o Added new equation of state -> MDJWF
2588      - EOS of McDougall et al., 2002, JAOT, submitted
2589      - caveat: the equation of state is only valid for a smaller (more
2590        realistic?) range of values than JMD95P/Z and UNESCO
2591      - added masks to the calculation of pressure in store_pressure
2592      - added more check values for density in check_eos (ini_eos.F), some of
2593        the old check values are out of the range of the MDJWF-eos, so don't
2594        expect perfect matches for those
2595    checkpoint46e_pre
2596    
2597    checkpoint46d_post
2598    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
2599      'OCEANICP', also initialised field pressure correctly in ini_eos in the
2600      case of pressure coordinates. eosType='JMD95Z' in
2601      combination with buoyancyRelation='OCEANICP' now causes an error.
2602    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2603      in find_alpha/beta.
2604    checkpoint46d_pre
2605    
2606    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2607      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2608    
2609    checkpoint46c_post
2610    o Changes necessary for ocean in p-coordinates
2611     -  Added new buoyancy relation = 'OCEANICP'
2612     -  Added new parameters = gravitySign (this used to be contained inside
2613        the factor dRdZ which I added when we first switched to R coordinates).
2614     X GM/Redi is not compatible (yet)
2615     X bottom drag and no-slip need to be debugged.
2616    checkpoint46c_pre
2617    
2618    checkpoint46b_post
2619    o Added new equation of state -> JMD95Z and JMD95P
2620      - EOS of Jackett and McDougall, 1995, JAOT
2621      - moved all EOS parameters into EOS.h
2622      - new routines ini_eos.F, store_pressure.F
2623    o Added UNESCO EOS, but not recommended because it requires
2624      in-situ temperature (see JMD95)
2625    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2626      unesco.f to be used with POLY3
2627    checkpoint46b_pre
2628    
2629    checkpoint46a_post
2630    o Added (atmospheric) pressure loading
2631      - new field in FFIELDS.h, etc...
2632      - new cpp flag ATMOSPHERIC_LOADING
2633    o Changed hFacC to _hFacC in calc_phi_hyd.F
2634    o Added SHORTWAVE_HEATING to some files for consistency
2635    checkpoint46a_pre
2636    
2637    checkpoint46
2638    further merges from release1_p5
2639    o new ctrl package
2640      - adopted from ECCO environment to enable optimization
2641      - added Eliassen Palm fluxes to controls
2642    o added Eliassen Palm flux controls to gradient check package
2643    o cost package
2644      - Compatible with new ctrl package
2645      - added Eliassen Palm cost hooks
2646      - modif's of existing cost functions
2647    o Adjoint-related bug fixes in kpp:
2648      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2649      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2650    o autodiff package
2651      - flow directives:
2652        + new for S/R do_the_model_io
2653        + enhanced for S/R checkpoint
2654        + new gmredi.flow
2655      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2656        disable adcommon.h/g_common.h by default.
2657      - fixed problem for adjoint of global_max
2658    o modified verification/carbon/
2659    o New setup for adjoint of global_ocean
2660    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2661    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2662    o incorporated hooks for sponge layer code (external_forcing.F)
2663    
2664    checkpoint45d_post
2665    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2666    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2667      (affects plume_on_slope "cg2d" output)
2668    o add new parameter deltaTfreesurf for free-surface time stepping
2669    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2670    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2671    o change phiMin in exp1 (to agree with documentation)
2672    o add new flags:
2673     - T,S forcing inside/outside Adams-Bashforth
2674     - turn off temp,salt advection and/or forcing
2675     - for each tracer, define internal flag for multiDimAdvection & A-B
2676    o monitor: change definition of KE to check conservation of Energy
2677    
2678    checkpoint45c_post
2679    o Removed f90 comments ("!")
2680    o Modified initialisations to enable exf package for MITgcm
2681      (without invoking ECCO_PACKAGE).
2682    o modifications to gradient check package (Martin Losch)
2683      - enable centered differences
2684      - modified format of standard output
2685    
2686    checkpoint45b_post
2687    o cleaned exchange calls in cg2d
2688    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2689    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2690      to configure barotropic setup (Martin Losch)
2691    o moved some initialisations within bi,bj loop in dynamics
2692      (TAF flow dependency)
2693    o in initialise_varia, moved call packages_init_variables
2694      before convective_adjustment_init
2695      (corresponding adjustment of TAF tape initialisation).
2696    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2697    
2698    checkpoint45a_post
2699    o compute Rho over the whole domain (extend iMin,jMin indices)
2700    o specific exchange for X-slice domain (case Ny=1)
2701    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2702    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2703    
2704    checkpoint44h_post = checkpoint45
2705    o Fix to restore differentiability:
2706      place at which packages_init_variables is called in
2707      initialise_varia is crucial for reverse control flow.
2708    o modifications in GMRedi to enable stable adjoint
2709      (corresponding modif's in thermodynamics, dynamics)
2710    o added missing hook for sponge layer code in external_forcing
2711    o modified test cost functions
2712    o storing in gad_advection (plus removal of write(0,*)!
2713    o missing headers TR1.h added in convective_adjustment routines
2714    o errorMessageUnit set non-equal zero in eeboot
2715      (conflict on some platforms, e.g. IBM SP3)
2716    o modified carbon verif.
2717    
2718    checkpoint44h_pre
2719    o vertical grid option: allow to put the Interface at the middle between
2720      2 cell-centers ; replace delZ in pkg/kpp by drF.
2721    o GM Advective form: Tracers are advected using the residual transport (=
2722      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2723    
2724    checkpoint44g_post
2725    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2726      results) ; ifdef missing in thermodynamics.F
2727    
2728    checkpoint44f_pre,checkpoint44f_post
2729    o added PTRACERS package
2730      This allows an arbitrary number of passive tracers to be integrated
2731      forward simultaneously with the dynamicaly model.
2732      + Implemented so far:
2733        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2734        - I/O and checkpointing
2735        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2736      + Not implemented so far:
2737        - KPP
2738        - OBCS
2739      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2740        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2741        line in data.pkg.
2742      + This package is disabled by default since it increases storage.
2743    
2744    
2745    o testscript: added -cleanup option
2746    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2747                 b) enable to filter 2D fields.
2748    
2749    checkpoint44e_pre,post
2750    o re-wrote convective adjustment to use pre-calculated weights
2751      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2752      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2753      Original calls to convect() still in place.
2754    
2755    chkpt44d_pre,post
2756    o added missing EXCLUDE_MONITOR flags
2757    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2758      (incompatible typ in MIN/MAX expressions caused problems
2759      on IBM SP3)
2760    o in genmake added variable MAKEDEPEND
2761      plus resetting for case SunOS
2762    o added timer_stats.c routine for IBM SP3
2763    o removed variables in dynamics
2764    !!! I forgot to create tag chkpt44d_pre !!!
2765    !!! But chkpt44d_pre = chkpt44c_post    !!!
2766    
2767    o real fresh water flux implemented with non-linear free-surface.
2768    
2769    chkpt44c_pre,post
2770    o few fix (mask in shap_s2, EmPmR in external_field_load,
2771      USE_NATURAL_BCS in solve_for_P);
2772    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2773    
2774    checkpoint44b_pre/_post
2775    o merge of relevant stuff from the ecco-branch:
2776      - genmake: removed $S64 overwrite for case SunOS
2777      - pkg/exf: update and corrections for field swapping and obcs
2778      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2779                  harmonized between ECCO and MITgcm
2780      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2781                      updated checkpointing_lev... lists for obcs
2782      - model/src: minor changes in forward_step, plot_field
2783                   added directive for divided adjoint in the_main_loop
2784      - pkg/mdsio: added mdsio_gl_slice
2785    
2786    o check parameters & config (chkpt44a_pre,post)
2787    o OBC and NonLin_FrSurf.
2788    
2789    checkpoint44
2790    o fix bug in mom_vi_del2uv
2791    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2792    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2793    o update AIM experiments (NCEP input files)
2794    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2795    o added some stuff for AD
2796    
2797    checkpoint43
2798    o added two new advection tests
2799    o added global 4x4 degree ocean test
2800    o added test of H&S94 with free surface on cube
2801    o some final mods for gradient check, adjoint,...
2802    
2803    checkpoint42
2804      Fixed AD-related problems:
2805    o Store directives up-to-date with re-arranged Adams-Bashforth
2806      (mainly thermodynamics.F)
2807    o New store directives for multi-dim. advection schemes
2808      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2809      * new common block and key passkey
2810      (mainly gad_advection.F)
2811    o Modified store directives for split of dynamics/thermodynamics
2812      for the case ALLOW_KPP
2813    o Cleaned argument list for timestep_tracer.F
2814    
2815    checkpoint41
2816    o re-formatted/added comments in prologues of key subroutines
2817      to work with protex
2818    
2819    checkpoint40
2820    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2821    o added FLT (floats) package from Arne along with demo. experiment
2822    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2823      implementation of forward-in-time forcing terms
2824    o more mods for non-linear free-surface including new variable
2825    o modified multi-dim method to work on cube
2826    o bug fix in KPP (from DM)
2827    
2828    checkpoint40pre9
2829    o added DST advection schemes
2830    o fix MPI bug on SGI's
2831    o modifications for non-linear free-surface
2832    o fixed conditionals for fixed flow/passive tracer only mode
2833    o added tension/strain form of stress tensor
2834    o changes to commenting of arguments for TAF/TAMC
2835    o added/updated many matlab scripts
2836    o added multi-dimensional advection method for tracers
2837      
2838    checkpoint40pre8
2839    o new package rw/
2840      Added method for dumping intermediate local arrays:
2841      mdsio_writetile - same as mdsio_writefield except works from inside
2842                        bi,bj loop
2843      mdsio_writelocal - same as mdsio_writetile except works for local
2844                         arrays
2845      write_local_r? - higher-level wrapper for mdsio_writelocal
2846      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2847      Example given at end of mom_vecinv.F that dumps some local arrays.
2848    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2849      control flux-form versus vector invariant code.
2850      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2851      or genmake -DISABLE ...
2852    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2853      (additional storing is now needed for case vecinv;
2854      currently nothing implemented to switch this storing off
2855      in case fluxform is used since no CPP flag available).
2856    
2857    checkpoint40pre7
2858    o bug fix in dynamics.F
2859      calc_viscosity called before k=1,Nr loop.
2860    o added some #ifdef's ALLOW_PASSIVE_TRACER
2861    o cleaned initialisations in ctrl_map_ini
2862      related to TAF
2863    
2864    checkpoint40pre6
2865    o split dynamics into thermodynamics & dynamics
2866    o corresponding split of calc_diffusivity into
2867      calc_diffusivity, calc_viscosity
2868      (kpp_calc_diff, kpp_calc_visc).
2869    o Added diffkr, kapgm to control variables
2870    o bug fix in gmredi_slope_limit for ldd97
2871    
2872    checkpoint40pre5
2873    o proper initialization of Adams-Bashforth time stepping
2874      + uses forward step for very first step of model (iter=0)
2875    o re-generated *all* output since almost all output is modified by this
2876      change (sorry but we've been putting this one off for about 2 years)
2877      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2878        *not* regenerated since they are already out of date and I don't
2879        want to create the impression that they are suddenly working.
2880    o removed KAP stuff for DEC's
2881    o modified/added many .cvsignore files in */code and */input
2882    o added new expt "solid-body.cs-32x32x1"
2883      + this uses an alternative form of ini_curvilinear_grid.F which
2884        is not necessarily any better than the current one...
2885    
2886    checkpoint40pre4
2887    o added re-initialisations of utrans,vtrans,rtrans in
2888      calc_common_factors which are crucial for TAF.
2889    o extended iMin,jMin range for calc_common_factors,
2890      calc_diffusivity
2891    o added option ALLOW_PASSIVE_TRACER
2892    o a few minor updates and fixes
2893    
2894    checkpoint40pre3
2895    o created calc_gtr1.F for gad package
2896    o split the_main_loop and re-introduced forward_step
2897    o some recomputations of nIter0 for TAMC
2898    
2899    checkpoint40pre2
2900    o Updated to latest branch of AJA, JMC
2901    o Added gradient check package
2902    o Added routines for passive tracer handling
2903    o Added carbon sequestration sensitivity experiment
2904    
2905    checkpoint39
2906     o Modifications and fixes to support TAMC
2907       (mainly missing or wrong directives)
2908     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2909       in addummy_in_stepping
2910     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2911     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2912     o Included following packages:
2913       cal: calendar
2914       exf: external forcing
2915       ecco: essential routines to control use of cal, exf
2916             (NB: this is not the full ECCO environment)
2917     o disabled some packages by default in genmake
2918    
2919    checkpoint38
2920     o see notes_c37_adj.txt
2921     o corrected wrong layer index in external_forcing_t
2922     o replaced the_main_loop/forward_step by the_main_loop
2923     o removed forceoutput from write_state
2924       (replaced criteria for initial/final state)
2925     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2926    
2927    checkpoint37
2928     o mdsio.F routine split and packaged in pkg/mdsio
2929       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2930        used unless genmake -disable=mdsio)
2931     o allow a more precise surface-geopotential gradient for the atmosphere
2932       taking into account the change in space of Alpha (=1/rho) at the surface.
2933     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2934       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2935     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2936       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2937       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2938     o Time-Average diagnostics defined as a pseudo package "timeave".
2939     o pickup files : old pickup (before c35) did not work with new code (c35
2940       and after) unless activating 2 commented lines in initialise-varia.
2941     o Non-Hydrostatic pickup file Pb fixed.
2942     o bug with Rigid-lid version (since c35) fixed.  
2943    
2944    checkpoint36
2945     o implement Crank-Nickelson barotropic time-stepping
2946     o recover Time-Average diagnostics
2947     o fix Pb in checkpoint (PR#19)
2948     o AIM become a standard package ; clean unused CPP_kees
2949    
2950    checkpoint35
2951     o subtantial rewrite of dynamics.f
2952     o allows staggered time-stepping
2953     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2954     o added bottom drag (linear + quadratic)
2955    
2956    checkpoint34
2957     o Modified exchange routines for correct reverse simulation.
2958     o Added verification output to comply with bug fix in impldiff.F
2959       as of c33 (exp2, natl_box).
2960     o Corrected store directives in dynamics.F
2961     o Corrected array boundaries in impldiff.F
2962     o Corrected array dimensions in gmredi.
2963       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2964     o Added routine GLOBAL_SUM_INT to global_sum.F
2965     o Added mdsio_gl.F for ECCO purposes.
2966    
2967    checkpoint33
2968     o Fixed bug in lower BC in impldiff.F
2969     o Fixed confusion about units of forcing arrays in FFIELDS.h
2970       namely Fu,Fv,Qnet,Qsw,EmPmR:
2971       - Removed verification/natl_box/code/external_fields_scale.F
2972         (did not differ from that in model/src)
2973       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2974         (see FFIELDS.h for description)
2975       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2976         kpp_calc.F and kpp_transport_t.F
2977       - Removed model/src/external_fields_scale.F and calls to it
2978       - verification/natl_box uses flux data with "atmospheric" sign so
2979         a special version of external_fields_load.F is used to
2980         change the data as it's read in. This way, the arrays
2981         have the right units and signs at all times tha a user could
2982         possibly use them.
2983     o Corrected genmake to delete a temporary file during configuration
2984    
2985    checkpoint32
2986     o Scaling of forcing fields moved from external_forcing.F to
2987       external_fields_scale.F, called directly after loading fields.
2988     o Surface relaxation terms added to surface tendency fields in
2989       extra subroutine.
2990     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2991       fields.
2992     o Changes in GMRedi to comply with packaging structure.
2993     o Modifications and bug fixes in KPP package.
2994     o Verification experiment for KPP added (verification/nat_box/)
2995    
2996    checkpoint31
2997     o Packages interface brought in line with defined standard
2998       -> new routines packages_...F
2999       -> changes in initialise_fixed.F, initialise_varia.F
3000       -> enables initialisation interface for ECCO package
3001     o Rescaling of external forcing fields immediately after read
3002       (removed from external_forcing.F)
3003       -> new: surface_fields_scale.F
3004       -> affects ini_foorcing.F, external_fields_load.F
3005     o Computation of surface tendencies before tendency updates.
3006       -> new: external_forcing_surf.F
3007     o Change of variable names useGMRedi, useKPP, useECCO
3008     o Further changes in dynamics.F, impldiff.F for TAMC
3009     o Tested for experiments 0, 2, 4.
3010       - not yet tested for GMRedi.
3011       - not yet tested for KPP.
3012    
3013    checkpoint30
3014     o Updates for OBCs
3015     o New experiment for test OBCs (internal_wave)
3016     o New output.txt in verification/exp4/results/
3017     o Updates for KPP: calculation of viscosity corrected, new variables
3018       kpp_dumpFreq and kpp_taveFreq
3019     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
3020       and entry for T90 in genmake
3021    
3022    checkpoint29
3023     o packaged KPP and GM/Redi
3024    
3025    checkpoint28
3026     o Corrected initialization of hFacMin for difference vertical coordinates
3027     o Modified calculation of partial cell thickness to more robust algorithm
3028     o config_summary.F: replaced write_1D_... by write_0D_...
3029       read_write.F: added subroutines write_0D_...
3030     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
3031       included some initialisations required for TAMC.
3032     o routine calc_isoslopes: modified sqrt computation to make it
3033       differentiable for zero argument.
3034     o routines dynamics, impldiff:
3035       included store directives and tape key computations required for TAMC.
3036     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
3037    
3038    checkpoint27
3039     o fixed calc_isoslopes() to so that cancellation of terms in tensor
3040       formulation works properly with variable resolution.
3041     o restructured the calling tree between the_model_main() and dynamics()
3042     o split initialise() into initialise_fixed() and initialise_varia()
3043     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
3044       in new routine ini_psurf()
3045    
3046    checkpoint26
3047     o moved some #ifdef in optional routines to encompass everything
3048       except the argument declarations. This was using up some memory.
3049     o fixed macros like _ADT to work with both versions of Linux cpp
3050     o cleaned up some unused and uninitialized variables
3051       (helps when debugging with strict compile options)
3052     o split up CPP_EEOPTIONS.h into options and macros
3053       (macros are now in eesupp/inc/CPP_EEMACROS.h)
3054     o patch for 2 processor JAM mode
3055    
3056    checkpoint25
3057     o updates for OBCs and NH
3058     o dramatically reduced memory usage
3059     o added "JAM" routines for use on Artic network
3060     o parameterization of convection by implicit vertical diffusion
3061     o added a diagnostic of convective index
3062     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
3063       (this is was partly for OBCs and NH but also in anticipation of
3064        an explicit free-surface option)
3065     o initial state input files for U and V
3066    
3067    checkpoint24
3068     o Removed some spurious "REAL"s
3069     o Updated KPP to latest version from JPL
3070     o Added a COS(latitude) in horizontal viscosity
3071    
3072  checkpoint23  checkpoint23
3073   o Added del^4 diffusion for salt and temperature   o Added del^4 diffusion for salt and temperature
3074   o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)   o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)

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