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revision 1.121 by heimbach, Tue Jan 21 19:44:45 2003 UTC revision 1.634 by jmc, Fri Mar 17 16:24:23 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 new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
8      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
9    o add on/off flag useOffLine for package OFFLINE
10    o seaice:
11      - modify advection so that it works also on the C-grid
12      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
13        problem in multi-tile runs with C-grid
14      - add flags for clipping ice velocities and/or masking solver forcing
15      - fix drag (ocean on ice) formulation and a bug that caused noise in the
16        C-grid solver
17      - added a few comments to seaice_diffusion.F
18      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
19        are now exclusive)
20      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
21        required re-ordering the code a little:
22       + make DAIRN global variable (defined in SEAICE)
23       + move computation of the viscosities eta and zeta into a new separate
24         routine (because I need to recompute them in seaice_ocean_stress.F)
25    
26    checkpoint58b_post
27    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
28      update output.txt of exp. aim.5l_cs.thSI
29    o various mnc cleanups and improvements:
30      + shrink lookup tables by factor of ~4
31      + better error reporting when running out of lookup space
32      + able to handle longer path/file names (up to 500 chars)
33    o adjoint:
34      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
35      - TBD: "hidden" mom_vecinv recomp. in dynamics
36    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
37     (allow to differentiate between forcing components using new integer flags:
38      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
39     and add new flag to put Dissipation tendency out of Adams-Bashforth.
40    o ecco
41      - enable trend removal from SSH anomaly obs.
42    o adjoint
43      - a fix for PmEpR when #undef EXACT_CONSERV
44      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
45      - try to fix "hidden" recomp. in forward_step for NLFS
46        (NLFS seems broken sometimes after I checked it in)
47    o seaice:
48     - add c-grid version of the dynamic solver:
49       + three new routines that are the c-grid substitute lsr, dynsolver
50         and ostres
51       + put a few fields that were local to dynsolver into global common
52         blocks, so that I can move the computation of stresses etc into
53         seaice_lsr (saves coding but may break the adjoint).
54     - replace more hardwired parameters by runtime parameters
55     - add ice masks that mask the rhs of the implicit solvers where there
56       is no ice (commented out in seaice_dynsolver, because i am not sure
57       if this works properly), eventually this should replace the clipping
58       of ice velocities in seaice_dynsolver to +/-40cm/s.
59    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
60      include it only where its needed
61    o move balancing of fluxes before the call of external_forcing_surf
62    o seaice:
63      - correct units of turning angles (now they are really in degrees)
64      - move computation of GWATX/Y out of main routine into dynsolver
65      - initialize GWATX/Y in seaice_init
66    o Apply mask on Fresh-Water flux (needed for SSH forcing).
67      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
68    o seaice: add runtime flags for turning angles (default to zero)
69    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
70      and trend from exf forcing and ctrl control adjustments
71    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
72      (since checkpoint57x_post)
73    o change the default rotation period to 86164.s = the Earth rotation
74    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
75      and based on a reference stratification. Tested within hs94.cs-32x32x5.
76    o seaice advection: add code for choosing between the default (2nd order
77      central differences) and multiDim advection schemes provided by
78      pkg/generic_advdiff
79    o seaice:
80      - removed all references to SEAICE_GRID.h fields from
81        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
82        (cubed-sphere configuration will change a little)
83      - grid computations in seaice_init are obsolete now.
84      - cleaned up code a little so that is easier to read (hopefully).
85      - added new (better?) discretizations of default advection and diffusion
86        (turn on with SEAICEuseFluxForm)
87      - replace 1 in 3d global fields by kSurface in growth.F
88      
89    checkpoint58a_post
90    o seaice:
91      - bug fix in advect.F
92    o shelfice:
93      - separate shelfice load anomaly from pload (breaks with time
94        dependent forcing), => introduce constant field shelficeLoadAnomaly.
95        Its default is 0., but it may be computed more cleverly from (unknown)
96        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
97        done offline. A good approximation of the pressure load anomaly is
98        necessary to avoid large initial adjustment processes underneath
99        deep-reaching shelfice.
100      - small fix in ISOMIP shelfice_thermodynamics
101      - add more sophisticated thermodynamics of Hellmer (1989), this is
102        now the default
103      - give a few constants more intuitive names
104    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
105      if bulk formulae are used in long integration (especially EmPmR). Turn
106      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
107      if balancePrintMean, the imbalance that is substracted is printed to
108      STDOUT.
109    o fix bug (typo) in obcs_apply_eta.F
110    o add a new package shelfice which enables us to model the circulation
111      underneath shelf-ice with draughts of hundreds of meters.
112     - works
113     - to do: + include improved thermodynamics
114              + check whether kSurfC (from model/inc/SURFACE.h) can be used
115                instead of new field kTopC
116              + can we use topoFile, Ro_surf and existing code in ini_depth.F
117                instead of new field R_shelfIce and new code in ini_depth.F
118                and ini_mask_etc.F?
119              + adjust vertical mixing schemes?
120    o seaice pkg:
121     - add a cpp-flag to include a simple formula for a salinity dependent
122       freezing point of sea water at the surface
123     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
124       meridional stresses are now different (and hopefully correct)
125    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
126       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
127       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
128    o pkg/diagnostics: add options and parameters for regional-statistics
129       diagnostics ; define regions by reading a region-mask from a file
130       (might add other options later)
131    o pkg/bulk_force:
132     - add option and parameters to use AIM surface-flux formulae.
133     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
134       others forcing fields (defined in PARM05, parameter file "data") are loaded
135       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
136     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
137     - use the right EXCH call for uwind,vwind (to work on CS-grid).
138     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
139       and parameters (note: calcWindStress replaces .NOT.readwindstress).
140     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
141    
142    checkpoint58
143    o add "--embed-source" option to genmake2 which, when the supporting
144      tools can be compiled (as determined by genmake2) will turn on the
145      embed_files package which then embeds the entire MITgcm source code
146      (*.[fFhc] + Makefile) used for the build within the executable
147      - requested by CNH but off by default
148      - adds a paltry <9MB to the mitgcmuv executable in most cases
149      - only writes the output when useEMBEDSRC in eedata is true
150    o clean up 3-dim. relaxation codes:
151      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
152      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
153      * Thanks to Tom Haine for testing!
154    
155    checkpoint57z_post
156    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
157      affects output (@ truncation level) of exp. plume_on_slope ; updated.
158    o fix the pickup behavior for obcs in combination with ptracers
159    o fix a bug in ptracers_external_fields_load
160    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
161      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
162    o transfered surface NH pressure to eta field (if exactConserv).
163    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
164         and update lab_sea output.txt file.
165    o completing 3-dim. relaxation code: additional term
166         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
167      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
168      * At compile time, in "EXF_OPTIONS.h" set
169          #define  ALLOW_CLIMTEMP_RELAXATION
170          #define  ALLOW_CLIMSALT_RELAXATION
171      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
172          tauThetaClimRelax3Dim = 15552000.0,
173          tauSaltClimRelax3Dim  = 15552000.0,
174      * 3 cases:
175          1) Use a constant-in-time 3-dim. field
176          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
177          3) Real-time relax. to time-evolving prescribed field
178    o Adding Laplacian-type smoothness constraint on
179      initial and boundary (forcing) controls (ic, bc)
180      * enable at compile-time via
181        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
182      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
183      * Absolute scale somewhat unclear so far
184      * no area weighting was included since no other cost term does so far
185    
186    checkpoint57y_post
187    First step for a NLFS adjoint
188    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
189    o new init. routines for calc_r_star, calc_surf_dr
190    o still need to deal with ini_masks_etc
191    o testreport seemed happy
192    checkpoint57y_pre
193    
194    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
195    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
196    o add new offset feature to offline pkg (plus minor cleanup)
197    o cfc fixes for final year of integration
198    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
199      be in GCHEM_OPTIONS).
200    
201    checkpoint57x_post
202    o fix testreport Pb in multiple test experiment.
203    o cleanup our namelist syntax in verification:
204      - make it more F95 standards compliant (some work still needed)
205      - allows the vast majority of our tests to work with gfortran
206    o Non-Hydrostatic:
207     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
208     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
209    o Allow to apply AB on T,S rather than on AB(gT,gS):
210     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
211     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
212       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
213     - need a "clever" read_pickup to restart from the other AB formulation
214    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
215    o remove some unused variables (reduces number of compiler warnings)
216    o adjoint
217      * Disable useVariableViscosity for adjoint for time being
218        (there are a number of extensive recomputations)
219      * Initialize certain variables needed for adjoint
220    
221    checkpoint57w_post
222    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
223                 fix the singleCpuIO RS version of MDSWRITEFIELD
224       and add a WARNING if using globalFiles=T with multi-processors.
225    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
226      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
227    o tracer advection scheme:
228      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
229       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
230       was not very convenient).
231      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
232       (further tests needed for the implicit DST & Flux-Limiter schemes).
233    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
234      and sRef for convenience, handy, when you want to initialize
235      ptracers in a large domain with a constant non-zero value. Also,
236      untangle ptracers_init.F a little.
237    
238    checkpoint57v_post
239    o change dome exp. to use variable viscosity in side-drag terms.
240    o remove all the files from the cfc_offline test since they are now
241      incorporated into tutorial_cfc_offline which has been producing
242      identical results for a few days of testing
243    o add new parameter: sideDragFactor to enable half-slip-side BC
244      and change side-drag S/R to use viscosity from mom_calc_visc
245      (can switch back by setting sideDragFactor=0.); affects results at
246      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
247       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
248    o vorticity & strain are now computed without masking, to account for
249      no-slip-side BC in variable viscosity calculation ; mask is applied
250      anyway later on, before computing advection/coriolis terms.
251    o modify exp4 to test new obcs support for reading from external files
252      and for passive tracers
253    o fix behavior of ptracers_monitor when monitor output is written to a
254      netcdf-file; still not independent of monitor.F (writes in the same
255      file).
256    o change default value of tRef (put a uniform, meaningful value for ocean
257      & atmos) and initialize sRef (was missing, as Martin mentioned).
258    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
259      to be proportional to enstrophy dissipation length.  Thus,
260       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
261      This is now consistent with Smagorinsky and with the manual.
262    
263    checkpoint57u_post
264    o OBCS and PTRACERS: add open boundary support for passive tracers
265      - either use homogenous (pseudo) v.Neumann conditions or prescribe
266        OB-values from file; this is not different from the way theta and salinity
267        are treated
268      - however, Orlanski-radiation conditions are not supported, and the model
269        will stop if you use pTracers and Orlanski at the same time.
270      - beefed up the rountine obcs_external_fields_load: now only those open
271        boundary values are overwritten with values from files for which there
272        are really files, otherwise the OB-fields remain untouched. This makes
273        it possible to use different OBs at different ends of the domain (as
274        with EXF)
275    o reduce number of exch calls in shap_filt (s2).
276    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
277      truncation level) 4/5 MLAdjust test results (11&12 digits match).
278    
279    checkpoint57t_post
280    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
281    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
282      same truncation, independent of the face number: affects affects several
283      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
284    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
285      note that biharmonic viscosity + no-slip was not tested in any experiment.
286    o fix bug in non-linear free-surf side-drag ; generate new output for
287      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
288    o make mnc honor the writeBinaryPrec flag for most kinds of output
289    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
290    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
291      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
292    o add brackets in multi-terms sum to get same truncation, independent of
293      the face number (manage to get exactly same value of gU,gV at the cs-edge)
294      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
295    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
296      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
297      a maximum grid-scale Reynolds number.  Also, changes all length calculations
298      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
299      Suggested values of viscosity parameters found in mom_calc_visc.
300      Many new viscosity diagnostics available.
301    
302    checkpoint57s_post
303    o Add clearing-house for viscosity calculations, mom_calc_visc and
304      correct numerous bugs in LeithD and Smagorinsky discretizations.  
305      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
306      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
307      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
308      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
309      The Strain-Tension form is now called with useStrainTensonVisc=.true.
310      ViscAhStrain and viscAhTension are now retired.
311    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
312    o In response to JMC's bug report, genmake2 now ignores any soft-links
313      that it finds in the *current* directory when searching for files.
314      Soft-links found in any other source directories will still work as
315      they did before.
316    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
317      a C routine to unlimit the stack size
318    o mnc-ify pkg/aim snapshot vars
319    o mnc-ify pkg/land as requested by Daniel
320    o various changes to mnc including:
321      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
322      - output can now be grouped so that all files within a group
323          change the ITER portion of their names in lock-step together
324      - can now read ("global") PER-FACE (in addition to PER-TILE) files
325          and works with both EXCH1 and EXCH2 (but needs more testing)
326      - writing works for all verification test cases w/ g77 on Linux
327    
328    checkpoint57r_post
329    o make MNC variable initialization happen earlier
330    o add diagnostics for (almost) each term of the momentum Eq.
331    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
332    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
333    o remove MINIMAL_TAVE_OUTPUT option ;
334      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
335    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
336      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
337    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
338    o add time-dependent SST, SSS control
339    o cost terms in ecco/ modularized (new cost_generic.F)
340    o cost_averages routines are modularized (new cost_averagesgeneric.F)
341    o new infrastructure for seaice model vs. obs misfits in seaice/
342      * driver from the_main_loop.F is seaice_cost_driver.F
343      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
344      * gradient check in Exp. 6a of natl_box_adjoint/
345    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
346      (see README file)
347    
348    checkpoint57q_post
349    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
350    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
351      - bug was reported by Jean-Michel and Ian Fenty
352    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
353      update exp. cpl_aim+ocn output.
354    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
355      Needed for high-res. runs with large global files
356      to be able to limit tapelev size
357    o Changed some tests for adjoint:
358      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
359      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
360      * global_ocean.90x40x15/ back to default 3-level checkpointing
361    o Modifications to enable scripted COMMON to MODULE conversion
362      * verification/OpenAD/code/ has necessary scripts and description;
363      * converts, compiles and runs successfully;
364    
365    checkpoint57p_post
366    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
367    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
368      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
369    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
370    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
371      (was already the case for dissipation with mom_vecinv,
372       and also the case for grad.PhiHyd when staggered-timeStep)
373      This will allow to put dissipation out-off the AB time-stepping.
374     Unfortunately, affects truncation error. Update output of exp. that "fails"
375      (cg2d matching number) and leave the others for later: front_relax(10),
376      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
377      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
378    
379    checkpoint57o_post
380    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
381      (2) its ready to be documented during the 20050801 DocFest
382    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
383      for ideal_2D_oce and lab_sea on linux_ia32_g77
384    o set to #undef CTRL_SET_OLD_MAXCVARS_30
385      in global1x1_tot/code_seaice_adj to access indices 32, 33
386      (worth another tag)
387    
388    checkpoint57n_post
389    o adding precip control xx_precip 32
390    o adding swflux control xx_swflux 33
391    o Replacing 10 forcing penalty cost routines by 1 generic.
392    o Implementing partitioning in time-mean and variable adjustment
393      for atmos. state.
394    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
395    o in natl_box_adjoint:
396      * updated exp 1 to 10
397        (but does not have time-mean vs. variable split results yet)
398    o updated global1x1/*_seaice_adj/
399      to incorporate latest changes
400    o enable useSingleCpuIO for mdsio vector routines
401      (applies in particular to tapelev I/O)
402    o removed inefficient K-loop in all active_file*control*.F
403    
404    checkpoint57m_post
405    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
406      and advect_cs (use EXCH-2 and standard cs-32 grid files).
407    o pkg/exch2: filling of face-corner halo regions is optional
408      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
409    
410    checkpoint57l_post
411     tag before updating tutorials (pre-release-2)
412    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
413       for output and interpolation of input fields onto model grid)
414    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
415       Affects results of exp. rotating_tank ; update output.txt.
416    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
417          and taking the square quantity and/or using a fraction-weight field.
418    o fix aim_diagnostics_init.F mate numbers.
419    o add mnc output capability to diagnostics/diagstat and update
420      our cvsignore files for the ACSII output generated
421    
422    checkpoint57k_post
423    o lab_sea now uses diagnostics package and provides a suite of
424      new EXF diagnostics output.
425    
426    checkpoint57j_post
427    o exf
428      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
429        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
430        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
431      * extended diagnostics output
432        - now includes all EXF variables
433        - hs, hl moved to common block
434        - separate S/R for diagnostics, called after ctrl vector is added
435        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
436        - EXFqnet contains true Qnet (i.e. includes qsw)
437      * updated verif. lab_sea, global_with_exf
438      * Rearranging hflux (exf_mapfields -> exf_getforcing)
439        to ensure that diagnostics sees a true EXFqnet
440    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
441    o diagnostics pkg: change pointers so that 1 diagnostic can be used
442      several times with different frequencies.
443    o mnc-ify the thsice package as requested by Daniel Enderton
444      - the monitor--MNC output needs work
445      - many attributes need to be added (most are currently blank)
446    o mnc-ify theaim_v23 package as requested by Daniel Enderton
447      - many attributes need to be added (most are currently blank)
448    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
449    o add Sadourny like discretization to the 4th.O vorticity advection scheme
450    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
451      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
452         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
453    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
454     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
455    
456    checkpoint57i_post
457    o Diagnostics package was changed: diagnostic allocation is now deactivated
458      by setting an empty file name in the namelist (used to be by setting 0 frequency)
459    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
460      add 1rst Order upwind vertical Shear.
461    o add a quick fix for A/B checkpointing in OFFLINE mode
462    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
463      end-run around the C/Fortran linking horror in eesup/src/timers.F
464    o added pkg/runclock: allows user to terminate run based on wall clock
465    o added non-hydrostatic scaling parameter: nh_am2
466    o pkg/my82: futile attempt to make results compiler-independent by adding
467      some "_d 0", etc. no effect.
468    o for mnc output, fill the 'T' coordinate var with myTime and create a
469      separate 'iter' variable for iteration count
470    o pkg/diagnostics:
471      add new capability: output of Global/Regional & per-level statistics ;
472      tested against monitor output (including land & thSIce) on various exp.
473    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
474    
475    checkpoint57h_done
476      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
477      data.diagnostics, data.gchem, data.ptracers) is done.
478    
479    o pkg/diagnostics: prepare for Global/Regional statistics.
480      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
481    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
482      and rename it: DIFFERENT_MULTIPLE
483    
484    checkpoint57h_post
485    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
486    o pkg/diagnostics: change output frequency, now in seconds (instead
487      of Nb of iterations). This requires to change data.diagnostics.
488    checkpoint57h_pre
489    
490    o in mnc, let the user create the output dir if both mnc_outdir_date
491      and mnc_outdir_num are false
492    o add fflags() to pkg/diagnostics which allows one to specify, on a
493      per-file basis, the file precision [default behavior is unchanged]
494    o added diagnostics to pkg/kpp, including computation of mixed layer
495      depth based on a temperature/density criterion
496    o updated verification/natl_box to test the new pkg/kpp diagnostics
497    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
498    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
499    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
500      not mnc -- this mistake was found by JMC and is now corrected
501    
502    checkpoint57g_post
503    o add Adams-Bashforth 3rd Order time stepping:
504      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
505      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
506    checkpoint57g_pre
507    
508    o make lambda[Theta,Salt]ClimRelax spatially varying
509      (default remains spatially uniform constant based on tau)
510    o added new control variables
511      * init. uVel, vVel, etanN
512      * lambda[Theta,Salt]ClimRelax
513    o separate masks used for ctrl_pack/unpack 'from write_grid' output
514      (suggested by G. Forget)
515    
516    checkpoint57f_post
517    o add parameter "baseTime" = model base time = time at iteration zero
518      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
519      account for baseTime shift
520    o move Coriolis arrays from PARAMS.h to GRID.h
521    checkpoint57f_pre
522    
523    o mnc-ifying the seaice package
524    o introduced an alternative length scale calculation for use in the limiting
525      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
526    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
527    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
528      as well as grad(vort3).  Made it compatible with both approximate form
529      for the cubed sphere and full form of these gradients.  Added flag
530      useFullLeith to select between approximate and full form.  
531    o add "d0" in getcon.F to reduce differences between compilers/platforms
532      update output.txt of exp. fizhi-gridalt-hs
533    o change port_rand funtion to allow to set the seed.
534    o fix obscure MNC bug involving conversion between reals and integers
535      - it caused no problems with certain (eg. gcc, ifc) compilers but the
536        new version is now more standards-compliant
537    o adjoint-related modifications
538      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
539      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
540      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
541    
542    checkpoint57e_post
543    o Adding eddy stress controls a la Ferreira et al.
544    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
545    
546    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
547      update output.txt of exp. fizhi-gridalt-hs
548    o add more "Z" dimensions and associated coordinate vars to MNC
549    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
550    o parameter calendarDumps: when set, approximate months (30-31 days) and years
551      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
552      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
553      months and years.  Requires pkg/cal.
554    o diagnostics: add pickup functionality
555      - off by default for backwards compatibility
556      - current version only uses MDSIO -- MNC will be added
557    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
558    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
559    
560    checkpoint57d_post
561    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
562    o modify verification/ideal_2D_oce so that it tests the creation of mnc
563      output from the diagnostics package
564    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
565    o make genmake2 more portable by using ".$FS" instead of ".f" for more
566      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
567    o add coordinate variables to the MNC output from the diagnostics package
568    o change MNC-flags default value: true when useMNC=TRUE
569    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
570      the ability (off by default) to read the grid information using MNC
571    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
572    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
573    o do snap-shot diagnostics at the middle of the time-interval (instead of
574      at the end).
575    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
576      new test for AIM with thSIce + slab-ocean
577    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
578    o move state variable diagnostics to the beginning of the time step ;
579      (note: still needs some work specially for snap-shot diagnostics)
580      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
581    
582    checkpoint57c_post
583    o Change testing option (-ieee) to get closer agreement between g77 & ifort
584    o generate new output.txt files on faulks with g77 & the new -ieee option
585    checkpoint57c_pre
586    
587    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
588      update output.txt of exp. global_ocean.90x40x15
589    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
590      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
591    o add saltFlux(+File) forcing capability with periodicExternalForcing
592    o allow to use pkg diagnostics for GM-Redi & ThSIce output
593    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
594    o improvements for the MNC output from DIAGNOSTICS:
595      - correct handling of the unlimitied dimension
596      - all dims now have associated coordinate variables
597      - variables located at U, V, and Corner ("Z") points are now written
598        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
599        *all* data points are output
600    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
601    o added pkg/seaice/seaice_monitor.F
602    o mdsio_readfield.F can now read files visible only to master MPI process.
603    o pkg/seaice: some test code for ice-modified ocean stress
604    o exf_getffields interpolation defaults to bilinear for all scalar forcing
605      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
606      spurious negative numbers for precipitation and humidity.  Will cause
607      some small numerical differences for integrations using pkg/exf/exf_interp.F.
608    o pkg/ctrl/
609      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
610        May be enabled via doPackDiag
611      *  introduce z-scaling of
612         + gradient (doZscalePack) and
613         + control (doZscaleUnpack)
614    o pkg/mdsio/
615      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
616      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
617    
618    checkpoint57b_post
619    o simplify options in diagnostics_fill arguments (remove weird combinations)
620    o fix MNC coordinate variables so that they now contain per-face index
621      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
622      general, EXCH2 grids are only aligned to a "local" coordinate system
623    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
624    o Implement instantaneous output within pkg diagnostics:
625      setting a negative frequency in data.diagnostics produces
626     "snap-shot" output (as opposed to time-average if freq > 0)
627    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
628      NOTE: change ptracer diagnostics name: use 2 characters to work with
629            more than 9 tracers. Add also diagnostics of advect & diffus flux.
630    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
631      becomes the coordinate variable for the 'T' dimension
632    o add CF-style coordinate variables to MNC
633      - just a first cut:  numbers are meaningless on the cubesphere and
634        missing along the T axis but otherwise it works!
635    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
636    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
637    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
638      this is based directly on what the model compute, so that the content of
639      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
640    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
641    o clean up build options files for SunOS, in particular
642      - remove -traditional from xmakedepend
643      - change -xarch=v9 to -xarch=native for f77
644      - restore use of make (not gmake)
645      - add CC=gcc if using g77
646    o changes per discussion of AM, JMC, & EH3 today:
647      - move redundant "grid" variables out of "state" -- in preparation of
648        creating proper CF-style coordinate variables and in recognition
649        that any/all grid variables can be easily copied (eg. w/NCO) from
650        the grid files into any of the other NetCDF files
651      - *always* output grid variables with MDSIO (this will eventually be
652        changed)
653      - output MNC grid file if useMNC is true
654    o every instance of _END_MASTER() has been found and replaced with
655      _END_MASTER( myThid ) in order to satisfy certain picky Sun
656      preprocessors
657    o re-arrange diagnostics pkg initialisation:
658     - allow each package to extend the available diagnostics list
659     - add some checking and fix small problems (multi-threaded, ...)
660     - new S/R diagnostics_fill (replace fill_diagnostics):
661       look through the short list of active diag. (instead of the long list)
662       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
663    
664    checkpoint57a_post
665    o this set of changes restores TAMC compatibility
666      tested for global_ocean.90x40x15 adjoint on trough
667      (what a pain)
668    
669    checkpoint57a_pre
670    o some modifs in tools/build_options for sunos
671    o call ctrl_pack for ctrl at end for optimcycle=0
672    
673    checkpoint57
674    o add horizontal bi-harmonic viscosity for vertical velocity
675      - new parameter viscA4W (defaults to viscA4)
676      - affects only non-hydrostatic code
677      - to be done: no-slip lateral boundary conditions
678    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
679    o implement Implicit Vertical advection for pTracers
680    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
681      (implemented also for implicit vertical diffusion & advection)
682    o OBCS: extend application of tracer open boundary conditions
683      to a strip beyond the boundary of width Olx/Oly
684    o add call monitor to TAF set of required calls (flow directives)
685      and include in natl_box_adjoint
686    o untangle a few ifdefs related to cost, ctrl, autodiff
687      untangel a few ALLOW_ECCO_OPTIMIZATION
688    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
689      (theta2, salt2 in ecco_cost_weights)
690    
691    checkpoint56c_post
692    o OBCS as control variables
693      - update ctrl_ad_diff.list, obcs_ad_diff.list
694      - remove balance of obcs controls from default
695      - fix index bug nobcs in ctrl_init
696      - fix dummy fields filen in ctrl_pack
697      - add dummy weights for obcs
698    o lsopt: comment out fort.94 output
699    o optim:
700      - remove unnecessary header files
701      - adjusted namelists
702      - add xerbla.F to Makefile
703    o exf:
704      - multiple modifications of exf_check_range
705      - unit change in exf_init_runoff from [m/year] to [m/s]
706    o mdsio:
707      - i/o-vector change debugLevel from debLevA to debLevB
708    
709    checkpoint56b_post
710    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
711      is called from DO_THE_MODEL_IO
712      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
713      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
714      - clean up PTRACERS_WRITE_TIMEAVE a little
715    o add another verification experiment that tests both the cfc-pkg and
716      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
717      reactive tendencies treated inline with regular timestepping
718    o testreport previously did a lousy job of comparing small numbers, so
719      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
720      implemented in the little c-progam tmp_cmpnum.c which is embedded in
721      testreport.
722    o ptracers_monitor: bug fix for MPI
723    
724    checkpoint56a_post
725    o GCHEM: finish reorganizating the package
726      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
727        (introduces another 3D-array for each passive tracer, but only if
728        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
729        gchemTendency is not needed because the timestep is done separately)
730      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
731      - GCHEM is now---more or less cleanly---separate from PTRACERS
732      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
733        so clear to me how that should be done in a general way.
734    o CFC: improve formatting of output in CFC_ATMOS
735    o PTRACERS:
736      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
737        that ALL experiments with ptracers enable can be checked. This makes
738        GCHEM_MONITOR obsolete.
739      - include a runtime parameter PTRACERS_monitorFreq that defaults to
740        monitorFreq
741      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
742    o add PTRACERS (PTR0[1-5]) to testreport output
743    o exf_check_range:
744      * default changed to .TRUE.
745      * will check values for niter0 if debLevA, every timestep if debLevB
746      * STOP in exf_check_range if 'out of range'
747      * range chosen generous to allow for potential extema
748      TBD: a version with stricter range
749           permitted range would be runtime parameters
750    o GMredi:
751      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
752      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
753      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
754    o GCHEM:
755      - move call to GCHEM_FORCING_SEP, so that it is now called before
756        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
757      - introduced a useGCHEM runtime flag and applied it everywhere.
758      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
759        this flag is now only visible within GCHEM-pkg routines.
760      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
761        be replaced by a 3D array that is computed before thermodynamics; for
762        this, the tracer ID iTracer had to be included into the parameter list
763        of ptracers_forcing
764      - set up forward_step to call gchem_forcing, that will replace
765        gchem_forcing_int in ptracers_forcing
766      - cleaning up
767    o small cleaning of exch2: remove files that are also in eesupp/src
768    
769    checkpoint56
770    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
771    o mnc: cleanup "full" files--fixes out-of-memory problem
772    o ECCO-GODAE
773      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
774      * fully merged and updated from SIO code
775        windstress sign change affects
776        - exf_inscal_[u/v]stress
777        - sign of xx_tau[u/v] adjustments
778        - signs in cost_scat
779      * ctrl_get_gen: avoid update of tau[u/v] for first few days
780      * natl_box_adjoint updated and compressed
781      * 2-level checkpoint switch added
782        (tested in EXP. 1 of natl_box_adjoint)
783      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
784    o SVD
785      * first complete, non-hacked version for SVD calculations
786      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
787        performed via direct access files admtlm_vector.it????
788        (via ctrl_[un]pack)
789      * optimcycle is used for ARPACK iteration counter
790        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
791      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
792        and add linear transforms where necessary
793      * controls are initial/final SST, SSS (can be extended; need to check
794        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
795    o mdsio: filename info to both stderr, stdout
796    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
797      from sign change
798    
799    checkpoint55j_post
800    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
801      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
802    o add consistent build directories and .cvsignore files to verification
803    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
804    o make all subroutines 30 or less characters in length for certain older
805      compilers to work (a thorough search only turns up two routines in
806      pkg/ptracers)
807    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
808      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
809    
810    checkpoint55i_post
811    o change arrays for total vertical diffusivity (2.D if explicit,
812      3.D if implicit) ; each ptracer uses its own background value.
813    o added mnc/NetCDF output capability to ocn_compon_interf
814      - added bits to verification/cpl_aim+ocn so that it can run on
815        ITRDA and other clusters without the mpirun "-wd" option
816    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
817      configuration
818    o give MNC the ability to create additional files rather than
819      exceeding a specified file size limit "MNC_MAX_FILESIZE"
820      - the default is just less than 2GB which is a practical limit
821        on many systems
822    o Compute the non-local term using either KPP vertical diffusivity (=default)
823       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
824    
825    checkpoint55h_post
826    o add verification test "vermix"
827    o remove all the *_ioinc flags and replace with the single global
828      outputTypesInclusive flag
829    o allow to set a vertical profile of vertical diffusivity for T & S
830    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
831    o useMNC moved from data.mnc to data.pkg
832    
833    checkpoint55g_post
834    o Renaming carbon AD experiments to comply with testreport conventions
835    o Updating adjoint of Held-Suarez hs94.1x64x5
836    o Fixing directives for non-ECCO forward_step, after ECCO directives
837      have been fixed to avoid recomp. of do_oceanic_phys
838      Works well for global_ocean.90x40x15,
839      but recomp. issue remains for carbon
840    o Updating adjoint output for natl_box_adjoint after
841      pkg/ecco has been modified (see taga c55d_post)
842    
843    checkpoint55f_post
844    o rename to timeave_init_fixed
845    
846    checkpoint55e_post
847    o some delicate re-shuffle of store directives to avoid one
848      extra call of do_oceanic_physics
849      affects ecco_the_main_loop.F, do_oceanic_physics.F
850      checkpoint_lev1_directives.h
851    o NB: this may break global_ocean adjoint temporarily,
852      but it is clear how to fix it. Will do later, need this now.
853    
854    checkpoint55d_post
855    o ECCO specific cost function terms (up-to-date with 1x1 runs)
856    o ecco_cost_weights is modified to 1x1 runs
857    o modifs to allow observations to be read in as
858      single file or yearly files
859    o enable to read exf forcing fields as either
860      single file or yearly files (flag useExfYearlyFields)
861    checkpoint55d_pre
862    
863    o switch between 2-level and 3-level checkpointing
864    o add ability of MNC to write local and "partial" (eg. 2D slices where
865      the full 3D field is never actually stored) arrays to NetCDF files
866      with the correct (that is, the complete multi-dimensional) set of
867      array indicies
868      - used in mom_vecinv() to write the diagFreq output
869      - tested (demonstrated) in verification/aim.5l_cs
870    o further mnc-ification
871      - add verification/lab_sea to the list with mnc setups
872      - fix undefined mnc v-names in cd_code
873      - add kpp to mnc output (both snapshot and timeave)
874    o non-hydrostatic code
875      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
876        in calc_gw.F
877      - defaults to viscAh
878      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
879        friction or Leith) in non-hydrostatic mode, as long as there is
880        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
881    o pkg/cost
882      extend simple cost functions to treat time mean quantities
883      (T,U,V) via cost_accumulate_state from cost_tile
884    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
885        be 2 times larger than the minimum size the advection scheme requires.
886        now get a perfect conservation of salt in advect_cs test-exp (updated)
887    o GGL90 (Gaspar's TKE mixed layer)
888      - add horizontal diffusion of TKE, requires exchanges in
889        do_fields_blocking_exchanges, horizontal diffusivity is zero by
890        default. In OPA there is no horizontal diffusion of TKE but the
891        mixing coefficients are computed from a horizontal average of TKE of
892        6 points or so. I think that diffusion has a little more physical
893        justification.
894      - clean up ggl90_calc in the hope of reducing memory usage (this hope
895        was in vain)
896      - mask tke-variable in ggl90_init
897    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
898    o fix biharmonic diffusion on CS-grid.
899    o more obcs stuff
900      - added obcs_external_fields_load as an alternative to the EXF-pkg option
901        for reading boundary values. This routine is called from
902        obcs_prescribe_read
903      - updated obcs_check
904      - changed sponge layer relaxation parameter units for days to seconds
905      - turned off sponge layer by default
906      - changed argument list of OBCS_CALC to myTime+deltaTclock
907      - fixed about 35 bugs in obcs_external_fields_load
908    
909    checkpoint55c_post
910    o obcs stuff
911      - new runtime flags useOBCSprescribe, useOBCSbalance
912      - re-arranged obcs_calc
913      - moved exf_getobcs to obcs_prescibe_read
914        obcs_prescibe_read is called after ORLANSKI stuff
915        and independent of it (executable can contain all).
916      - updated obcs_check
917      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
918        These may be necessary only if tangential velocities are
919        prescribed at OB, not sure, needs testing.
920    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
921      which simplifies the calls and passes the ifc check-bounds test
922    
923    checkpoint55b_post
924    o add a 2D scalar, Z location, exchange_2 routine.
925    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
926      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
927      affects advect_cs results (for the wrong reason): update output.txt
928    o use a more standard discretization for biharmonic viscosity ;
929     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
930      affects results of dome set-up: update output.txt
931    o fix gad_advection.F (CubedSphere part), back to version 1.23
932    o fix bug in mom_vi_del2uv.F (CubedSphere part).
933    
934    checkpoint55a_post
935    o merged code to
936      * prescribe/read time-dependent open boundaries
937        (works in conjunction with exf, cal)
938      * sponge layer code for open boundaries
939      * each boundary N/S/E/W now has its own CPP option
940        (healthy for the adjoint)
941    
942    checkpoint55
943    o up-to-date adjoint of previous breaks
944      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
945      - global_ocean_ebm: adjoint still needs fix (TLM ok)
946      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
947      - carbon: * remove tr1-related adjoint verification
948                * add ptracer as control variable
949    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
950      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
951    
952    checkpoint54f_post
953    o in verification/carbin/ remove experiment related to
954      ALLOW_PASSIVE_TRACER (array tr1 etc)
955      code_ad/ input_ad/ results_ad
956    
957    o add two new packages
958      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
959        + subject to optimization (memory)
960      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
961        + subject to reordering (many GOTOs in the original code)
962        + so far opps is called for every (i,j) point, and then operates in
963          the vertical; one may want to reorder the scheme in order operate in
964          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
965          fields)
966    o overhaul of IO so that we now have flags for MDSIO and/or MNC
967      - all verification tests compile and run with linux_ia32_g77
968      - defaults are compatible with current input files--nothing
969        should change if you were not previously using MNC
970      - MNC output has been added in numerous places (eg. timeave)
971        but there are still a few writes not yet do-able with MNC
972        (this is in progress)
973      - flags now allow for either/or/both use of MDSIO and MNC and
974        documentation will soon follow
975      - numerous small formatting cleanups for ProTeX
976    o add version info (via BUILD_INFO.h) to MNC and stdout
977    
978    checkpoint54e_post
979    o add two new packages
980      - pp81 (Packanowski and Philander, 1981), Richardson number and
981        stratification dependent mixing
982      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
983      - these scheme operate in a similar manner as KPP (without ghat, of
984        course), however there is only one diffusivity that is used for both
985        temperature and salinity (and passive tracers)ç
986    o add offline package
987    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
988      provided by Stephanie Dutkiewicz
989    o genmake2: add ability to search for C compilers and cleanup test output
990      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
991    
992    checkpoint54d_post
993    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
994    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
995      leading to additional shift by 5 days each year of integration
996       (i.e. leading to considerable offset over the years)
997    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
998    o start with no AB and no initial filtering (staggerTimeStep):
999      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1000    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1001      (external loading & cpl import/export stay in forward_step.F)
1002    o update coupling interface to work with new staggerTimeStep
1003    o change MDSIO ptracers_pickup.
1004    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1005    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1006    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1007    
1008    checkpoint54c_post
1009    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1010      this affects (truncation error) output.txt of test-exp:
1011       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1012    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1013    o change Qnet to always be the net heat flux, (+upward).
1014      affects (truncation error) output of natl_box exp.: updated
1015    o define the max number of passive tracers in PTRACERS_SIZE.h
1016    o start to test mnc routinely in exp0
1017    o add sea-ice loading (sIceLoad) as a new forcing field.
1018    
1019    checkpoint54b_post
1020    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1021       impressive on Altix and Opteron systems)
1022    o diagnostics can now write NetCDF files through the mnc package
1023    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1024    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1025    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1026      affects (truncation error) output of lab_sea & natl_box exp.: updated
1027    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1028    
1029    checkpoint54a_post
1030    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1031    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1032    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1033    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1034      + internal_wave (shift in writing cg2d_ini_res)
1035    checkpoint54a_pre
1036    
1037    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1038      - modified verification/lab_sea and natl_box_adjoint accordingly
1039    
1040    checkpoint54
1041    checkpoint53g_post
1042    o prepare splitting of thermodynamics: store convect.counter in common block
1043    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1044      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1045    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1046    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1047    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1048    o restore adjointability
1049    
1050    checkpoint53f_post
1051    o modifications that affect AIM experiment results (update output.txt):
1052      - no advection of S at top interface Nr (pkg/generic_advdiff)
1053      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1054    o AIM pkg:
1055      - include stability function into surf.Flux derivative relative to Tsurf
1056      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1057    
1058    checkpoint53e_post
1059    o merged cylindrical coord configuration
1060    o added rotating_tank experiment
1061    checkpoint53e_pre
1062    
1063    checkpoint53d_post
1064    o faulks upgraded: re-generate output.txt that have changed:
1065       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1066    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1067    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1068    o added Sadourny discretization of Coriolis
1069      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1070      - re-enabled use of omega3 (useAbsVorticity)
1071    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1072      vector-invariant equations
1073      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1074    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1075      hopefully without new bugs
1076      - still to do: biharmonic friction for non-hydrostatic w
1077    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1078    o regenerated output for global_ocean_ebm (using -ieee)
1079    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1080      of mom_common/
1081      - simple re-arrangement of instructions within computing loop
1082    checkpoint53d_pre
1083    
1084    checkpoint53c_post
1085    o new version of coupler for AIM+thSIce and Ocean models
1086     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1087     - land: change Evaporation of snow
1088     - aim with thSIce: fix bug in snow-precip.
1089    o changes to calc_gw.F
1090     - bug fix for w^2 term near the bottom boundary
1091     - (hopefully) improve the lateral slip boundary condtions for use with
1092        partial/looped cells
1093      - because the bug fix changes two verification experiments anyway (exp5
1094        and plume on slope), change the lateral boundary condition from half slip
1095        to the value of no_slip_sides
1096    o ebm package wasnt quite up to the parallel task. Fixed that.
1097    o Adjoint of EBM package + verification
1098      * TLM OK
1099      * ADM not sufficient accuracy yet (needs further testing)
1100    
1101    checkpoint53b_post
1102    o Commiting new energy balance model to repository
1103      * package is pkg/ebm
1104      * verif. is verification/global_ocean_ebm
1105      * references are in ebm_driver.F
1106    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1107    C        Global thermohaline circulation. Part I:
1108    C        Sensitivity to atmospheric moisture transport.
1109    C        J. Climate 12(1), 71-82
1110    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1111    C        Global thermohaline circulation. Part II:
1112    C        Sensitivity with interactive transport.
1113    C        J. Climate 12(1), 83-91
1114    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1115    C        Destabilization of the thermohaline circulation
1116    C        by atmospheric eddy transports.
1117    C        J. Climate 7(12), 1870-1882
1118    o Will need long integration testing.
1119    checkpoint53b_pre
1120    
1121    o created pkg/mom_common in preparation for variable viscosity code
1122    o renamed and split ini_mnc_io
1123    o pkg/land: only liquid water can diffuse or run-off
1124    o AIM using land: soil wetness availability account for snow
1125    o added printMapIncludesZeros to EEPARMS namelist
1126    
1127    checkpoint53a_post
1128    o restore TAMC compatiility for exf_constants.h
1129      (no usage of _d in .h)
1130    o Additional storing in KPP in an attempt to fix
1131      TAMC problem with adjoint of KPP code.
1132      (no success...)
1133      Identical code works fine with TAF.
1134    o Fixed verification/natl_box_adjoint experiments.
1135      Initial conditions for Experiments 4 and 5 are now
1136      set to "SEAICE_initialHEFF=0", which is more reasonable,
1137      and hence gives results closer to that of Experiment 2.
1138      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1139    
1140    checkpoint53
1141    o stable checkpoint with up to date adjoint
1142      TLM tests only run for 1st grdchk at the moment. Its unclear if
1143      this is a code problem or a problem with resetting code for g_
1144      variables that is being autogenerated wrong.
1145      Otherwise:
1146       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1147       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1148         are both still in chaos following their security messes.
1149    
1150    checkpoint52n_post
1151    o various build (mostly genmake2) changes including:
1152      - ability to build/run more easily within Cygwin and MacOS X
1153      - more complicated Makefiles with a stronger dependence on Gnu Make
1154    o pkg/seaice modifications
1155      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1156        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1157        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1158      - changed proxy for geostrophic velocity and updated
1159        verification/lab_sea/results/* accordingly
1160      - removed ADI dynamic solver from pkg/seaice
1161      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1162        they caused a segmentation fault under certain circumstances
1163      - removed unused field WATR
1164    o bug fix in exf-package:
1165      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1166         now reflect that.
1167    o small fixes in the cal-package:
1168      - set reference date to first of January for the 'model'-calendar
1169      - failing of cal_CheckDate in cal_FullDate now actually results in a
1170        warning
1171    o small modifications in exf-package to increase flexibility:
1172      - change climtempfreeze from a constant to a runtime parameter that
1173        is specified in data.exf_clim (default = -1.9)
1174      - introduce runtime parameter windstressmax (default = 2.0) that is
1175        specified in data.exf
1176    o fix in pkg/thsice:
1177      - update Evap (Tsf changes) to be consistent with Latent heat flux
1178      - maintain snow precipitation unchanged (even if Tsf >=0).
1179     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1180    
1181    checkpoint52m_post
1182    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1183      this does not change any of the results, because myIter=0 in swfrac always
1184      lead to jwtype=2 (the default anyway), but the call makes little sense
1185      as a default
1186    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1187    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1188      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1189    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1190    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1191    o extending useSingleCpuIO option to work with new exch2 I/O format
1192      - old-style, missing-tile I/O is still accessible by defining CPP
1193        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1194    o monitor package can write to NetCDF files and/or STDOUT
1195    o fix re-definition bug in MNC_GRID_INIT_ALL()
1196    o doc/api_reference added
1197      - a framework for building an API Reference Manual using all
1198        the "protex" comments embedded in the code
1199      - see pkg/generic_advdiff, pkg/mnc for examples
1200    o MNC:
1201      - make myThid the last argument for all subroutines
1202      - new default for the grid files: NO halos
1203      - add useMNC and other run-time flags
1204      - separate per-file-group handling of the unlimited dimension
1205      - early initialization of MNC w/ flags read at the eeboot stage
1206        and lookup tables set in initialize_fixed
1207      - write all MNC output to a freshly-created directory
1208    o thermodynamics sea-ice (thsice) is now tested with testreport.
1209    o test exp. advect_cs: use the standard cs32 grid ; update output.
1210    o Added functionality to grdchk:
1211      pick global i,j,k position (or nearest wet) where to perform check.
1212    
1213    checkpoint52l_post
1214    o new land formulation:
1215      a) use ground enthalpy as prognostic variable to ensure exact
1216         energy conservation.
1217      b) account for water temperature and for latent heat of freezing
1218         in all processes (rain, run-off, ground storage)
1219      c) compute surface and ground temperature implicitly.
1220    o aim_v23 modification for new land model:
1221      a) Treat separately land / ocean / sea-ice surface fluxes
1222         to allow implicit computation of land & sea-ice surface temp.
1223      b) add snow precipitation.
1224    checkpoint52l_pre
1225    
1226    o fix problem (when 1 tile is empty) in min/max monitor.
1227    o fix bug in timeAve (u,vZetatave in common block)
1228    o no restoring terms under ice for pkg/seaice
1229    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1230    o bug fix for pkg/seaice pickups
1231    o change MNC call locations and add coordinate attributes
1232    o mask vorticity at the corner ; affects global_ocean.cs output
1233    o fix ini_curvilinear_grid ; test CS experiments with mpi
1234    o aim.5l_cs: modify sea-ice fraction input file ; update output
1235    o exf: Adding simple range check routine for exf fields after read
1236    
1237    checkpoint52k_post
1238    o removed top-level directory "diags"
1239      - we migrated these functions to pkg/timeave a long time ago
1240    o fixed bug introduced in pkg/monitor
1241    o accuracy ctrlprec = 32 insuffient for gradient checks using
1242      averaged fields (I/O via cost_averages)
1243      -> use ctrl.h in active_file*.F to control I/O precision.
1244    o paramter list of CALL ADTHE_MAIN_LOOP
1245    o added initial do_the_model_io to ecco
1246    o set all ...Freq to zero after cost_final
1247      taveFreq, dumpFreq, pChkptFreq
1248    o MAIN and ECCO differentiability restored
1249    
1250    checkpoint52j_post
1251    o fix nchklev in tamc.h for global_ocean...
1252    o Bringing flow and store directives up-to-date
1253    o Really weird thing!
1254      call do_the_model_io from the_main_loop with parameters
1255      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1256      TAF places a faulty re-call of initialise_varia
1257      after cost_final call which should not be there!
1258    checkpoint52j_pre
1259    
1260    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1261      error messages
1262    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1263    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1264      debug output
1265    o modfied mdsio_writefield.F to handle non-global files under exch2
1266    o update AIM Cubed-Sphere exp (aim.5l_cs):
1267      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1268    o update AIM Equatorial Channel exp:
1269      use standard aim_v23 pkg and change the SST fields to be more realistic.
1270    o globalFile now works with exch2
1271    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1272      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1273    o limit timeave output for hi-res integrations
1274    
1275    checkpoint52i_post
1276    o removed CPP_EEOPTIONS.h from verification/*/code
1277    o updated the tiling for global_ocean_pressure
1278    checkpoint52i_pre
1279    
1280    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1281      the old pkg/aim).
1282    
1283    checkpoint52h_pre
1284    o shortened offending lines in exch2_send_rx?.template
1285    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1286    o genmake2: add build & execute test for NetCDF code
1287    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1288      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1289    o added useSingleCPUIO flag to monitor.F and mon_out.F
1290    o added temporary hack for sea-ice dynamics on the cube:
1291      metric terms are ignored and it is assumed that
1292      there is no sea-ice on cube faces 1, 2, 4, and 5.
1293    
1294    checkpoint52f_post
1295    o added exch2 cube routines to pkg/exch2
1296    o modified hs94.cs-32x32x5 to use it
1297    o added new grid files to hs94.cs-32x32x5
1298    checkpoint52f_pre
1299    
1300    checkpoint52e_post
1301    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1302      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1303    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1304      to work with implicit vertical advection and AB ;
1305    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1306    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1307     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1308    checkpoint52e_pre
1309    
1310    o fix bug in impldiff when Nr=1 or Nr=2.
1311    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1312    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1313    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1314      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1315    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1316    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1317    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1318    
1319    checkpoint52d_post
1320    o re-tiled many expts to allow comparison in multi-processor mode
1321      - updated output accordingly
1322      - changed hs94.128x64x5 to use intial T from file rather than use the
1323        random number generator
1324    o add infrastructure in model routines for fizhi and gridalt packages
1325    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1326    o changes to permit hi-res, cubed-sphere, configuration
1327      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1328      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1329      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1330        of surface winds for the cube
1331      (A verification experiment, based on global_ocean.cs32x15, but with
1332       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1333       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1334       complete with example surface forcing files and matlab scripts to look
1335       at the output and compare it with that of global_ocean.cs32x15.)
1336    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1337       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1338       to conform to the common rule.
1339    o check-in the first version of the coupler + interfaces for multi-components
1340       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1341       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1342       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1343       - ocean and atmos. share the same horizontal grid (no interpolation).
1344       - exchanges between component and coupler is done in forward_step
1345    o new verification experiment, cpl_aim+ocn:
1346       coupled ocean - AIM atmosphere on cs32 grid.
1347    
1348    checkpoint52d_pre
1349    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1350    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1351    
1352    checkpoint52c_post
1353    o Fixing OPTIONS files for use of exf:
1354      - ALLOW_ECCO not needed
1355      - ECCO_CPPOPTIONS.h should not be included from
1356        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1357        as has been the case in the past
1358      - All cal/exf related options are currently set in
1359        single header file. Should remain so until we
1360        agree on a consistent new policy.
1361    o Removed all CPP options for cal package.
1362      cal has no more CPP options.
1363    o modified STOREs in GAD_ADVECTION
1364    o corrected key comp. for passkey
1365    
1366    checkpoint52b_post
1367    o new version: "thsice" of thermodynamic sea-ice pkg:
1368     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1369     - modify fluxes but do not change theta directly;
1370     - light cleaning of bulk_force pkg (still needed with thsice).
1371     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1372       + output_thsice.txt to test thsice & bulk_force pkgs.
1373    o put back grid & coriolis monitor output.
1374    checkpoint52b_pre
1375    
1376    o call "do_the_model_io" at the beginning (=> dump initial state)
1377    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1378    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1379      (need info on NUMBER_OF_PTRACERS)
1380    o missing PTRACERS headers in some routines
1381    o default tamc.h in pkg/autodiff supposed to crash
1382      to ensure proper customization
1383    
1384    checkpoint52a_post
1385    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1386      - moved surfaceTendencyTice from pkg/seaice to main code
1387      - subroutine FREEZE_SURFACE now limits only surface temperature
1388        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1389        => new output.txt for global_ocean.cs32x15 & global_with_exf
1390      - keep the old version of FREEZE for backward compatibility;
1391        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1392      - corresponding modifs for TAF directives
1393    o added surface flux output variables to TIMEAVE_STATVARS
1394    o time-averaged output for pkg/ptracers
1395    o fix problem with ECCO-related divided adjoint
1396      snapshot file was missing some ad-variables,
1397      but no warning issued by TAF
1398    
1399    checkpoint52a_pre
1400    o some bug fixes for #undef REAL4_IS_SLOW
1401    
1402    checkpoint52 = ecco_c52_e35
1403    o after testing adjoints of checkpoint51u_post
1404    
1405    checkpoint51u_post
1406    o this is the post-merge tag of the ecco-branch
1407      (needs another clean checkout and re-testing)
1408    o various natl_box_adjoint configs and results
1409      but no input fields
1410    o obcs adjoint not yet merged!
1411    o adding ECCO global 1x1 and 2x2 degree configs
1412    o updated/extended some store directives for seaice
1413    o pkg/ecco now containes ecco-specific part of cost function
1414    o top level routines the_main_loop, forward_step
1415      supersede those in model/src/
1416      previous input data.cost now in data.ecco
1417      (new namelist ecco_cost_nml)
1418    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1419    
1420    checkpoint51t_post
1421    o this is the pre-merge tag of the ecco-branch
1422    
1423    checkpoint51s_post
1424    o cleanup: removed various obsolete #define-s
1425    o pkg/grdchk
1426      - renamed 'ph-grd 3' to 'grad-res'
1427      - merged from ecco-branch
1428        (remaining bug fixes for obcs gradient checks)
1429      - additional high-precision output for testreport
1430        (grep for 'precision_grdchk_result')
1431    
1432    checkpoint51r_post
1433    o cleaned up or removed CPP_OPTIONS.h files
1434    o updated results for some of the tests to reflect the new
1435      optfiles (-ieee: -O0 instead of -O3)
1436    
1437    checkpoint51q_post
1438    o cd_code:
1439      - moved cd_scheme.F -> cd_code_scheme.F
1440      - separate read_checkpoint from cd_code_ini_vars.F
1441      - separated cd_code part from write_checkpoint
1442      - updated AD_SOURCE, generated .flow
1443      - added CD_CODE_VARS.h to the_main_loop
1444      - Moving cd_code specific store dir.s to pkg/cd_code
1445    o ctrl package totally restructured
1446      - pack/unpack now optional and decoupled from
1447        xx_/adxx_ I/O
1448      - ctrl_pack/unpack cleaned
1449        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1450      - confined inclusion of AD_CONFIG.h to where necessary.
1451    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1452    
1453    checkpoint51p_post
1454    o create initial cd_code package
1455      - WARNING: the initialization of fields within packages
1456        is broken because INI_FIELDS (where READ_CHECKPOINT is
1457        called) is called *before* PACKAGES_INIT_VARIABLES.
1458        This seems to be backwards since
1459        1) its important to initially zero the entire field including
1460           the "halo" region
1461        2) zeroing needs to be done *before* reading pickup info
1462           and the pickup call might or might not happen in any
1463           particular run
1464      - this needs an overhaul for R2
1465    o cleanup verification/*/code/GMREDI_OPTIONS.h
1466    o cleanup testreport
1467    
1468    checkpoint51o_post
1469    o bringing AD-related verif's up to date with genmake2
1470      - carbon/
1471      - global_ocean.90x40x15/
1472      - hs.94.1x64x5/
1473      - (front_relax/ )
1474    o (more) consistent directory structure for AD-related verif.'s
1475    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1476    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1477    o bug fix in find_alpha.F for MDJWF:
1478      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1479        change rho -> rho-rhoConst
1480      - replace call find_rho to find_rhonum
1481    o initialisation of rFlx extended to full array (required by TAF)
1482      and shifted to thermodynamics
1483    o removed PTRACERS.h in ptracers routine
1484    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1485    o Correcting initialisations for fVerU, fVerV.
1486    o helping TAF to recognize dependency on kUp for
1487      fVerU, fVerV
1488    o Replacing delZ by delR in pkg/ctrl/
1489    checkpoint51o_pre
1490    
1491    o undid all of cp51 pending some cleanups and discussion
1492    o added the [#include "AD_CONFIG.h"] statement to all files that need
1493       it for adjoint/tl #defines
1494     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1495     o removed tools/genmake since it no longer works
1496    
1497    checkpoint51n_post
1498    o modifications to make FREEZE flux visible to pkg/kpp
1499      - moved surfaceTendencyTice from pkg/seaice to main code
1500      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1501      - subroutine FREEZE now limits only surface temperature
1502        (this means new output.txt for global_ocean.90x40x15,
1503         global_ocean.cs32x15, and global_with_exf)
1504    o added surface flux output variables to TIMEAVE_STATVARS
1505    
1506    checkpoint51n_pre
1507    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1508    o added [#include "AD_CONFIG.h"] to all files that use the following
1509      defines:
1510      - ALLOW_ADJOINT_RUN
1511      - ALLOW_TANGENTLINEAR_RUN
1512      - ALLOW_ECCO_OPTIMIZATION
1513    
1514    checkpoint51m_post
1515    o incorporating changes to get TAMC/TAF working in genmake2
1516      - added new TAMC/TAF targets to the Makefile
1517      - various cleanups related to package handling
1518      - these changes should have no impact on the forward model
1519    
1520    checkpoint51l_post
1521    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1522     - faster algorithm for cal_addtime.F
1523     - higher precision arithmetic, where needed
1524     - pkg/exf *startdate variables changed from calendar date to
1525       model integration time
1526    
1527    checkpoint51l_pre
1528    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1529    o enable to apply restoring on S & T only in a latitude band.
1530    o update output (external_forcing_surf modif. change truncation errors)
1531       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1532    
1533    checkpoint51k_post
1534    o change default to: useNHMTerms=.FALSE.
1535     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1536       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1537     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1538        exp1, ideal_2D_oce
1539     - change data file of oceanic exp (leave the results unchanged for now)
1540       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1541    o set gravitySign automatically according to the vertical coordinate used
1542      (and change sign: back to "logical" value: +1 when R increases downward)
1543    o added an include barrier to the default CPP_OPTIONS.h and
1544      removed the #include "PACKAGES_CONFIG.h" from it
1545    o fix a bug in mom_fluxform (from chk51j_post)
1546    
1547    checkpoint51j_post
1548    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1549    o adjusted some flow directives (dynamics, thermodynamics)
1550    o added cubed-sphere case to test cost function
1551    o heckpoint_lev?_directives.h now include
1552      pkg-specific directives, whenever those are enabled.
1553    o Moving pkg-specific flow directives to corresponding pkg
1554      Moving pkg-specific differentiation list to corresponding pkg
1555      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1556      ---> conventions are
1557           - pkg_ad.flow
1558           - pkg_ad_diff.list
1559           - pkg_ad_check_lev?_dir.h
1560    
1561    checkpoint51i_post
1562    o merge of the branch-genmake2
1563      - knowingly breaks the older genmake
1564      - automatic generation of all ALLOW_${PKG_NAME} defines
1565      - new testreport supersedes older testscript
1566    o large number of package inclusion and header cleanups
1567    checkpoint51i_pre
1568    
1569    o new output for adjoin of global ocean vector invariant
1570    o fix for checkpoint of thermodynamic seaice and bulk_force
1571    o Steph gchem various cleanups
1572    
1573    checkpoint 51h_pre
1574    o fixed some single quotes
1575    o modify gchem pkg to be more versatile
1576    o modifications to clean up dic pkg
1577    o add pkg/cfc
1578    
1579    checkpoint51g_post
1580    o provide links for ARPACK and ADM*TLM
1581    o start removing verification/vero/
1582    o update AD-related stuff
1583      (in particular some IF-statements in model/src/ routines)
1584    o adding to verification/global_ocean.90x40x15/ adjoint of
1585      vector invariant setup
1586    
1587    checkpoint51f_post
1588    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1589    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1590      of tracer Green's fucntions for ocean inversion project.
1591    
1592    checkpoint51f_pre
1593    o Added on-the-fly spatial interpolation capability
1594        "USE_EXF_INTERPOLATION" to pkg/exf.
1595      - This is a temporary Cartesian-grid hack until
1596        the super-duper ESMF coupler becomes available.
1597      - See verification/global_with_exf/README for usage example.
1598      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1599        flags and modified pkg/seaice accordingly.
1600    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1601        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1602        non-local transport term.
1603    
1604    checkpoint51e_post
1605    o pkg/mom_vecinv:
1606      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1607      - add time-ave diagnostic of vorticity advection.
1608    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1609    o atmospheric geopotential: - include water vapor effect;
1610                                - use p^kappa in p* scaling.
1611    o land pkg: read initial state from files.
1612    o AIM : add stratospheric drag in the upper level
1613    
1614    checkpoint51d_post
1615    o change function ILNBLNK (=> last non-blank char.) to return zero
1616      (instead of the string length) when the string. char is empty
1617    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1618    o modif's to restore TAMC compatibility
1619      - avoid "_d" constructs in PARAMETER declarations
1620      - avoid interrupting lines by comment lines
1621    o Use cluster local disks for purely local I/O
1622      vs. globally visible disks needed for ctrl stuff
1623      (merged from ecco-branch)
1624      - new active_file_loc... and mdsio_..._loc routines
1625      - affected packages: autodiff, ctrl, grdchk, mdsio
1626    
1627    checkpoint51c_post
1628    o introducing integer flag debugLevel
1629      - debLevZero: suppress all output
1630      - debLevA: standard
1631      - debLevB: equivalent to current debugMode=.TRUE.
1632    o introducing pathname variable mdsioLocalDir for mdsio
1633      that can be specified at runtime
1634      (relevant for cluster I/O to local disk)
1635    `
1636    >>>checkpoint51b_post
1637    adjoint of ptracers
1638    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1639    o extended state in checkpoint_lev?, etc.
1640    o alternative ctrl/cost with tr1 or ptracer
1641    o new comlev1_bibj_ptracers
1642    o new ptracers.flow
1643    o made ptracers_forcing same as external_forcing_s
1644    o added verification for adjoint with ptracers
1645      - adm. grdchk fail so far
1646      - tlm. grdchk OK
1647      - checked tapelev/comlev recomputations: OK
1648    <<<checkpoint51b_pre
1649    
1650    checkpoint51a_post
1651    o added code for biogeochemistry package
1652      - new pkgs: dic, gchem
1653      - new subroutine in ptracers
1654    o modify code for biogeo packages
1655      - in model/src and pkg/ptracers
1656    
1657    checkpoint51
1658    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1659      - autodiff, ctrl, exf, grdchk, seaice
1660      kept separate packages
1661      - cost, ecco, obcs
1662    o updating verification/internal_wave, verification/lab_sea
1663      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1664    
1665    checkpoint50i_post
1666    o Preparing next differentiable checkpoint and sync
1667      of MAIN vs. ecco-branch
1668      - 1st step: this one is differentiable
1669      - 2nd step: next(! not this) checkpoint will have updated packages
1670                  from ecco-branch)
1671    
1672    checkpoint50h_post
1673    o new package "land": provide surface BC for AIM.
1674    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1675    o AIM: use true log-P extrapolation for near surface temp (= as in
1676        F.Molteni paper) ; update aim.5l_cs output.
1677    o New variable in PARM03 for more flexible pickups
1678    o somewhat cleaned package initialisation sequence for
1679      ctrl/ cost/ ecco/ in packages_... routines
1680    
1681    checkpoint50g_post
1682    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1683      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1684      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1685        made the default because of faster convergence than ADI
1686    
1687    checkpoint50f_post
1688    o exf totally restructured
1689      - replaced all exf_set_ routines by one generic exf_set_gen.F
1690        and made sure it's still differentiable
1691      - split exf_getffields.F into new exf_bulkformulae.F
1692      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1693      - updated adjoint/makefile and relevant verif. accordingly
1694    
1695    checkpoint50f_pre
1696     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1697          + change Evap over land. (update aim.5l_cs output)
1698     o added missing .cvsignores and made uniform across expts
1699     o changed configuration of tidal_basin_2d expt
1700     o added pkg/debug functions for tracing code in fatal crashes
1701     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1702     o new fn in pkg/monitor to stop model if solution grows too big
1703     o removed lots of single quotes from comments
1704    
1705    checkpoint50e_post
1706    o make KPP work with PTRACERS
1707     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1708       nearly a copy of kpp_transport_s
1709     - there is no analogue to SurfaceTendencyS, so I have to use
1710       gPtr(of the surface layer) instead
1711    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1712    checkpoint50e_pre
1713    
1714    checkpoint50d_post
1715    o change kpp output from multiple-record state files to single-record state
1716      files analogous to write_state.F
1717    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1718      analogous to the cg2d-related output.
1719    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1720      so that writing to internal file fn (with length 512) fails.
1721    checkpoint50d_pre
1722    
1723    checkpoint50c_post
1724    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1725    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1726    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1727    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1728    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1729    
1730    checkpoint50c_pre
1731    Merging from release1_p13:
1732    o bug fix for pkg/seaice dynamic solver
1733    o Added SEAICE_initialHEFF to pkg/seaice
1734    
1735    checkpoint50b_post
1736    o store u*,v* in gU,V instead of in guNm1,gvNm1
1737    o in order to put the momForcing out of the Adams-Bashforth:
1738      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1739      to timestep.F
1740    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1741    o re-generate output for highly sensitive test-exp:
1742       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1743    
1744    checkpoint50b_pre
1745    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1746    o corrected CPP option mismatch in exf_Bulk... functions for case
1747      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1748    
1749    checkpoint50a_post
1750    o Bug fix for merging between c50 and KPP.
1751      ikey was passed from thermodynamics to kpp_calc via
1752      common block rather than being recomputed in kpp_calc,
1753      in contradiction with new key itdkey.
1754      New key ikppkey created, and tamc.h headers updated.
1755    
1756    checkpoint50
1757    - 2nd step of merge with ecco-branch:
1758      merge changes in ecco-branch back into main trunk
1759    - bug fix in find_alpha
1760    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1761    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1762    - merged some sliced AD support routines
1763    
1764    checkpoint49
1765    merged from ecco-branch:
1766    o exf:
1767      - Enable initialisation of forcing fields to constant
1768        (runtime) values.
1769      - in exf_getffields.F
1770        Reduce i-/j-loop to interior domain, discarding overlaps.
1771        That also fixes wrong TAF-key computations for key_1, key_2
1772        with bulf formulae.
1773      - exf_init.F modify #ifdef for exf_init_evap
1774      - exf_getffieldrec.F, ctrl_getrec.F
1775        The following INT-usages are not safe:
1776          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1777          fldcount = int(fldsecs/fldperiod) + 1
1778        and were modified.
1779    o autodiff: checkpoint_lev...
1780      - updated storing for bulk formulae (some arrays were missing)
1781      - added state for seaice package
1782      - synchronized with main branch
1783    o DIVA:
1784      Modif.s in
1785      - the_main_loop.F
1786      - the_model_main.F
1787      and added cost_final_restore.F cost_final_store.F
1788      o With these changes, it is possible to fully separate
1789        the first forward run to compute the cost function (mdthe_main_loop)
1790        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1791        into separate model executions.
1792        This enables better tuning of DIVA to given queue sizes.
1793      o Loss of cost function value in consecutive DIVA runs is
1794        fixed by storing to 'costfinal' file.
1795      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1796        beginning/end of adjoint integration is accounted for.
1797      The current changes apply to TAF-1.4.26.
1798      TAF has one remaining bug, requiring one manual change
1799      (see MITgcm manual).
1800    o cal: synchronized between MAIN and ecco-branch
1801    
1802    checkpoint48i_post
1803    o Changes to restore differentiability of code w.r.t. previous tag
1804      (mostly adding new routines to make list and replacing
1805      pressure by totPhiHyd).
1806    o Updated and merged grdchk package
1807      - has both ADM and TLM checks
1808      - works for single- and multi-proc.
1809      - output cleaned
1810      - worked successfully for parallel DIVA
1811    o genmake:
1812      - Adding -platform=SP4
1813      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1814    o Modif. for DIVA:
1815      ctrl_unpack should not be called in intermediate DIVA interval.
1816      (similar thing would apply for active files such as
1817      tbar, sbar, psbar, which should not be reinitialised;
1818      only relevant for ecco-branch)
1819    
1820    checkpoint48h_post
1821    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1822    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1823    o Added SEAICE_initialHEFF to pkg/seaice
1824    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1825    
1826    checkpoint48g_post
1827    --- EOS:
1828    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1829      store total Potential in totPhyHyd for diagnostics & EOS.
1830    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1831    --- Pressure/geopotential gradient:
1832    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1833    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1834      ( changes results of global_ocean_pressure )
1835    o NLFS + z-coord.: add eta*Rho' contribution.
1836    o accurate phiHyd when using interface-W at the middle between 2 centers
1837     ( changes results of ideal_2D_oce )
1838    o includes r* 2nd term in potential gradient.
1839    
1840    checkpoint48f_post
1841    Merging from release1_p12:
1842    o Modifications for using pkg/exf with pkg/seaice
1843      - improved description of the various forcing configurations
1844      - added basic radiation bulk formulae to pkg/exf
1845      - units/sign fix for evap computation in exf_getffields.F
1846      - updated verification/global_with_exf/results/output.txt
1847    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1848      (SBO) core products, including oceanic mass, center-of-mass,
1849      angular, and bottom pressure (see pkg/sbo/README.sbo).
1850    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1851      to avoid negative values in shallow regions.
1852      - updated verification/natl_box/results/output.txt
1853      - updated verification/lab_sea/results/output.txt
1854    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1855    o Added useSingleCpuIO option (see PARAMS.h).
1856    o Updated useSingleCpuIO option in mdsio_writefield.F to
1857      work with multi-field files, e.g., for single-file pickup.
1858    o pkg/seaice:
1859      - bug fix in growth.F: QNET for no shortwave case
1860      - added HeffFile for specifying initial sea-ice thickness
1861      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1862    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1863      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1864    o pkg/seaice:
1865      - adjoint-friendly modifications
1866      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1867    
1868    checkpoint48e_post
1869    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1870    o dynamics: change definition of computational domain & adapt mom_fluxform
1871      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1872    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1873        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1874        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1875        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1876        inverted_barometer solid-body.cs-32x32x1
1877      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1878    
1879    checkpoint48d_post
1880    o in preparation for r*:
1881     a) use pre-computed gradient of hydrostatic potential:
1882        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1883     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1884        => affects results of glob_oce_pressure (different truncation error)  
1885      update output.txt of ideal_2D_oce & global_ocean_pressure
1886    
1887    checkpoint48d_pre
1888    o in preparation for r*:
1889      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1890      pass the 2 comp. of the grad. as arguments to momentum S/R.
1891      but for the moment, only used if it does not change the results.
1892    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1893    
1894    checkpoint48c_post
1895    Modifications in treatment of initial flux forcing controls
1896    to avoid extra storing of flux fields.
1897    
1898    checkpoint48c_pre
1899    o Added tidal_basin_2d experiment (currently 1D!)
1900    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1901    
1902    checkpoint48b_post
1903    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1904     (modification to pressure gradient not yet implemented)
1905    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1906      (for U & V) that are used for vertical advection of momentum.
1907    
1908    checkpoint48a_post
1909    o In preparation for r*, use temp. array to compute vertical transport
1910       in flux-form momentum pkg. => change results of few test-exp.
1911      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1912                        lab_sea, natl_box & plume_on_slope
1913    
1914    checkpoint48
1915    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1916    
1917  checkpoint47j_post  checkpoint47j_post
1918  o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.  o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1919  o moved adexch from forward_step to addummy_in_stepping  o moved adexch from forward_step to addummy_in_stepping

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