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revision 1.171 by jmc, Sun Jul 13 20:32:42 2003 UTC revision 1.623 by heimbach, Mon Mar 6 19:19:59 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 ecco
8      - enable trend removal from SSH anomaly obs.
9    o adjoint
10      - a fix for PmEpR when #undef EXACT_CONSERV
11      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
12      - try to fix "hidden" recomp. in forward_step for NLFS
13        (NLFS seems broken sometimes after I checked it in)
14    o seaice:
15     - add c-grid version of the dynamic solver:
16       + three new routines that are the c-grid substitute lsr, dynsolver
17         and ostres
18       + put a few fields that were local to dynsolver into global common
19         blocks, so that I can move the computation of stresses etc into
20         seaice_lsr (saves coding but may break the adjoint).
21     - replace more hardwired parameters by runtime parameters
22     - add ice masks that mask the rhs of the implicit solvers where there
23       is no ice (commented out in seaice_dynsolver, because i am not sure
24       if this works properly), eventually this should replace the clipping
25       of ice velocities in seaice_dynsolver to +/-40cm/s.
26    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
27      include it only where its needed
28    o move balancing of fluxes before the call of external_forcing_surf
29    o seaice:
30      - correct units of turning angles (now they are really in degrees)
31      - move computation of GWATX/Y out of main routine into dynsolver
32      - initialize GWATX/Y in seaice_init
33    o Apply mask on Fresh-Water flux (needed for SSH forcing).
34      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
35    o seaice: add runtime flags for turning angles (default to zero)
36    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
37      and trend from exf forcing and ctrl control adjustments
38    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
39      (since checkpoint57x_post)
40    o change the default rotation period to 86164.s = the Earth rotation
41    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
42      and based on a reference stratification. Tested within hs94.cs-32x32x5.
43    o seaice advection: add code for choosing between the default (2nd order
44      central differences) and multiDim advection schemes provided by
45      pkg/generic_advdiff
46    o seaice:
47      - removed all references to SEAICE_GRID.h fields from
48        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
49        (cubed-sphere configuration will change a little)
50      - grid computations in seaice_init are obsolete now.
51      - cleaned up code a little so that is easier to read (hopefully).
52      - added new (better?) discretizations of default advection and diffusion
53        (turn on with SEAICEuseFluxForm)
54      - replace 1 in 3d global fields by kSurface in growth.F
55      
56    checkpoint58a_post
57    o seaice:
58      - bug fix in advect.F
59    o shelfice:
60      - separate shelfice load anomaly from pload (breaks with time
61        dependent forcing), => introduce constant field shelficeLoadAnomaly.
62        Its default is 0., but it may be computed more cleverly from (unknown)
63        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
64        done offline. A good approximation of the pressure load anomaly is
65        necessary to avoid large initial adjustment processes underneath
66        deep-reaching shelfice.
67      - small fix in ISOMIP shelfice_thermodynamics
68      - add more sophisticated thermodynamics of Hellmer (1989), this is
69        now the default
70      - give a few constants more intuitive names
71    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
72      if bulk formulae are used in long integration (especially EmPmR). Turn
73      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
74      if balancePrintMean, the imbalance that is substracted is printed to
75      STDOUT.
76    o fix bug (typo) in obcs_apply_eta.F
77    o add a new package shelfice which enables us to model the circulation
78      underneath shelf-ice with draughts of hundreds of meters.
79     - works
80     - to do: + include improved thermodynamics
81              + check whether kSurfC (from model/inc/SURFACE.h) can be used
82                instead of new field kTopC
83              + can we use topoFile, Ro_surf and existing code in ini_depth.F
84                instead of new field R_shelfIce and new code in ini_depth.F
85                and ini_mask_etc.F?
86              + adjust vertical mixing schemes?
87    o seaice pkg:
88     - add a cpp-flag to include a simple formula for a salinity dependent
89       freezing point of sea water at the surface
90     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
91       meridional stresses are now different (and hopefully correct)
92    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
93       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
94       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
95    o pkg/diagnostics: add options and parameters for regional-statistics
96       diagnostics ; define regions by reading a region-mask from a file
97       (might add other options later)
98    o pkg/bulk_force:
99     - add option and parameters to use AIM surface-flux formulae.
100     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
101       others forcing fields (defined in PARM05, parameter file "data") are loaded
102       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
103     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
104     - use the right EXCH call for uwind,vwind (to work on CS-grid).
105     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
106       and parameters (note: calcWindStress replaces .NOT.readwindstress).
107     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
108    
109    checkpoint58
110    o add "--embed-source" option to genmake2 which, when the supporting
111      tools can be compiled (as determined by genmake2) will turn on the
112      embed_files package which then embeds the entire MITgcm source code
113      (*.[fFhc] + Makefile) used for the build within the executable
114      - requested by CNH but off by default
115      - adds a paltry <9MB to the mitgcmuv executable in most cases
116      - only writes the output when useEMBEDSRC in eedata is true
117    o clean up 3-dim. relaxation codes:
118      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
119      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
120      * Thanks to Tom Haine for testing!
121    
122    checkpoint57z_post
123    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
124      affects output (@ truncation level) of exp. plume_on_slope ; updated.
125    o fix the pickup behavior for obcs in combination with ptracers
126    o fix a bug in ptracers_external_fields_load
127    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
128      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
129    o transfered surface NH pressure to eta field (if exactConserv).
130    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
131         and update lab_sea output.txt file.
132    o completing 3-dim. relaxation code: additional term
133         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
134      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
135      * At compile time, in "EXF_OPTIONS.h" set
136          #define  ALLOW_CLIMTEMP_RELAXATION
137          #define  ALLOW_CLIMSALT_RELAXATION
138      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
139          tauThetaClimRelax3Dim = 15552000.0,
140          tauSaltClimRelax3Dim  = 15552000.0,
141      * 3 cases:
142          1) Use a constant-in-time 3-dim. field
143          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
144          3) Real-time relax. to time-evolving prescribed field
145    o Adding Laplacian-type smoothness constraint on
146      initial and boundary (forcing) controls (ic, bc)
147      * enable at compile-time via
148        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
149      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
150      * Absolute scale somewhat unclear so far
151      * no area weighting was included since no other cost term does so far
152    
153    checkpoint57y_post
154    First step for a NLFS adjoint
155    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
156    o new init. routines for calc_r_star, calc_surf_dr
157    o still need to deal with ini_masks_etc
158    o testreport seemed happy
159    checkpoint57y_pre
160    
161    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
162    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
163    o add new offset feature to offline pkg (plus minor cleanup)
164    o cfc fixes for final year of integration
165    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
166      be in GCHEM_OPTIONS).
167    
168    checkpoint57x_post
169    o fix testreport Pb in multiple test experiment.
170    o cleanup our namelist syntax in verification:
171      - make it more F95 standards compliant (some work still needed)
172      - allows the vast majority of our tests to work with gfortran
173    o Non-Hydrostatic:
174     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
175     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
176    o Allow to apply AB on T,S rather than on AB(gT,gS):
177     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
178     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
179       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
180     - need a "clever" read_pickup to restart from the other AB formulation
181    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
182    o remove some unused variables (reduces number of compiler warnings)
183    o adjoint
184      * Disable useVariableViscosity for adjoint for time being
185        (there are a number of extensive recomputations)
186      * Initialize certain variables needed for adjoint
187    
188    checkpoint57w_post
189    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
190                 fix the singleCpuIO RS version of MDSWRITEFIELD
191       and add a WARNING if using globalFiles=T with multi-processors.
192    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
193      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
194    o tracer advection scheme:
195      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
196       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
197       was not very convenient).
198      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
199       (further tests needed for the implicit DST & Flux-Limiter schemes).
200    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
201      and sRef for convenience, handy, when you want to initialize
202      ptracers in a large domain with a constant non-zero value. Also,
203      untangle ptracers_init.F a little.
204    
205    checkpoint57v_post
206    o change dome exp. to use variable viscosity in side-drag terms.
207    o remove all the files from the cfc_offline test since they are now
208      incorporated into tutorial_cfc_offline which has been producing
209      identical results for a few days of testing
210    o add new parameter: sideDragFactor to enable half-slip-side BC
211      and change side-drag S/R to use viscosity from mom_calc_visc
212      (can switch back by setting sideDragFactor=0.); affects results at
213      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
214       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
215    o vorticity & strain are now computed without masking, to account for
216      no-slip-side BC in variable viscosity calculation ; mask is applied
217      anyway later on, before computing advection/coriolis terms.
218    o modify exp4 to test new obcs support for reading from external files
219      and for passive tracers
220    o fix behavior of ptracers_monitor when monitor output is written to a
221      netcdf-file; still not independent of monitor.F (writes in the same
222      file).
223    o change default value of tRef (put a uniform, meaningful value for ocean
224      & atmos) and initialize sRef (was missing, as Martin mentioned).
225    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
226      to be proportional to enstrophy dissipation length.  Thus,
227       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
228      This is now consistent with Smagorinsky and with the manual.
229    
230    checkpoint57u_post
231    o OBCS and PTRACERS: add open boundary support for passive tracers
232      - either use homogenous (pseudo) v.Neumann conditions or prescribe
233        OB-values from file; this is not different from the way theta and salinity
234        are treated
235      - however, Orlanski-radiation conditions are not supported, and the model
236        will stop if you use pTracers and Orlanski at the same time.
237      - beefed up the rountine obcs_external_fields_load: now only those open
238        boundary values are overwritten with values from files for which there
239        are really files, otherwise the OB-fields remain untouched. This makes
240        it possible to use different OBs at different ends of the domain (as
241        with EXF)
242    o reduce number of exch calls in shap_filt (s2).
243    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
244      truncation level) 4/5 MLAdjust test results (11&12 digits match).
245    
246    checkpoint57t_post
247    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
248    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
249      same truncation, independent of the face number: affects affects several
250      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
251    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
252      note that biharmonic viscosity + no-slip was not tested in any experiment.
253    o fix bug in non-linear free-surf side-drag ; generate new output for
254      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
255    o make mnc honor the writeBinaryPrec flag for most kinds of output
256    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
257    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
258      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
259    o add brackets in multi-terms sum to get same truncation, independent of
260      the face number (manage to get exactly same value of gU,gV at the cs-edge)
261      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
262    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
263      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
264      a maximum grid-scale Reynolds number.  Also, changes all length calculations
265      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
266      Suggested values of viscosity parameters found in mom_calc_visc.
267      Many new viscosity diagnostics available.
268    
269    checkpoint57s_post
270    o Add clearing-house for viscosity calculations, mom_calc_visc and
271      correct numerous bugs in LeithD and Smagorinsky discretizations.  
272      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
273      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
274      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
275      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
276      The Strain-Tension form is now called with useStrainTensonVisc=.true.
277      ViscAhStrain and viscAhTension are now retired.
278    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
279    o In response to JMC's bug report, genmake2 now ignores any soft-links
280      that it finds in the *current* directory when searching for files.
281      Soft-links found in any other source directories will still work as
282      they did before.
283    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
284      a C routine to unlimit the stack size
285    o mnc-ify pkg/aim snapshot vars
286    o mnc-ify pkg/land as requested by Daniel
287    o various changes to mnc including:
288      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
289      - output can now be grouped so that all files within a group
290          change the ITER portion of their names in lock-step together
291      - can now read ("global") PER-FACE (in addition to PER-TILE) files
292          and works with both EXCH1 and EXCH2 (but needs more testing)
293      - writing works for all verification test cases w/ g77 on Linux
294    
295    checkpoint57r_post
296    o make MNC variable initialization happen earlier
297    o add diagnostics for (almost) each term of the momentum Eq.
298    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
299    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
300    o remove MINIMAL_TAVE_OUTPUT option ;
301      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
302    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
303      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
304    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
305    o add time-dependent SST, SSS control
306    o cost terms in ecco/ modularized (new cost_generic.F)
307    o cost_averages routines are modularized (new cost_averagesgeneric.F)
308    o new infrastructure for seaice model vs. obs misfits in seaice/
309      * driver from the_main_loop.F is seaice_cost_driver.F
310      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
311      * gradient check in Exp. 6a of natl_box_adjoint/
312    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
313      (see README file)
314    
315    checkpoint57q_post
316    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
317    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
318      - bug was reported by Jean-Michel and Ian Fenty
319    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
320      update exp. cpl_aim+ocn output.
321    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
322      Needed for high-res. runs with large global files
323      to be able to limit tapelev size
324    o Changed some tests for adjoint:
325      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
326      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
327      * global_ocean.90x40x15/ back to default 3-level checkpointing
328    o Modifications to enable scripted COMMON to MODULE conversion
329      * verification/OpenAD/code/ has necessary scripts and description;
330      * converts, compiles and runs successfully;
331    
332    checkpoint57p_post
333    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
334    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
335      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
336    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
337    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
338      (was already the case for dissipation with mom_vecinv,
339       and also the case for grad.PhiHyd when staggered-timeStep)
340      This will allow to put dissipation out-off the AB time-stepping.
341     Unfortunately, affects truncation error. Update output of exp. that "fails"
342      (cg2d matching number) and leave the others for later: front_relax(10),
343      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
344      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
345    
346    checkpoint57o_post
347    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
348      (2) its ready to be documented during the 20050801 DocFest
349    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
350      for ideal_2D_oce and lab_sea on linux_ia32_g77
351    o set to #undef CTRL_SET_OLD_MAXCVARS_30
352      in global1x1_tot/code_seaice_adj to access indices 32, 33
353      (worth another tag)
354    
355    checkpoint57n_post
356    o adding precip control xx_precip 32
357    o adding swflux control xx_swflux 33
358    o Replacing 10 forcing penalty cost routines by 1 generic.
359    o Implementing partitioning in time-mean and variable adjustment
360      for atmos. state.
361    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
362    o in natl_box_adjoint:
363      * updated exp 1 to 10
364        (but does not have time-mean vs. variable split results yet)
365    o updated global1x1/*_seaice_adj/
366      to incorporate latest changes
367    o enable useSingleCpuIO for mdsio vector routines
368      (applies in particular to tapelev I/O)
369    o removed inefficient K-loop in all active_file*control*.F
370    
371    checkpoint57m_post
372    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
373      and advect_cs (use EXCH-2 and standard cs-32 grid files).
374    o pkg/exch2: filling of face-corner halo regions is optional
375      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
376    
377    checkpoint57l_post
378     tag before updating tutorials (pre-release-2)
379    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
380       for output and interpolation of input fields onto model grid)
381    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
382       Affects results of exp. rotating_tank ; update output.txt.
383    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
384          and taking the square quantity and/or using a fraction-weight field.
385    o fix aim_diagnostics_init.F mate numbers.
386    o add mnc output capability to diagnostics/diagstat and update
387      our cvsignore files for the ACSII output generated
388    
389    checkpoint57k_post
390    o lab_sea now uses diagnostics package and provides a suite of
391      new EXF diagnostics output.
392    
393    checkpoint57j_post
394    o exf
395      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
396        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
397        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
398      * extended diagnostics output
399        - now includes all EXF variables
400        - hs, hl moved to common block
401        - separate S/R for diagnostics, called after ctrl vector is added
402        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
403        - EXFqnet contains true Qnet (i.e. includes qsw)
404      * updated verif. lab_sea, global_with_exf
405      * Rearranging hflux (exf_mapfields -> exf_getforcing)
406        to ensure that diagnostics sees a true EXFqnet
407    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
408    o diagnostics pkg: change pointers so that 1 diagnostic can be used
409      several times with different frequencies.
410    o mnc-ify the thsice package as requested by Daniel Enderton
411      - the monitor--MNC output needs work
412      - many attributes need to be added (most are currently blank)
413    o mnc-ify theaim_v23 package as requested by Daniel Enderton
414      - many attributes need to be added (most are currently blank)
415    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
416    o add Sadourny like discretization to the 4th.O vorticity advection scheme
417    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
418      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
419         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
420    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
421     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
422    
423    checkpoint57i_post
424    o Diagnostics package was changed: diagnostic allocation is now deactivated
425      by setting an empty file name in the namelist (used to be by setting 0 frequency)
426    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
427      add 1rst Order upwind vertical Shear.
428    o add a quick fix for A/B checkpointing in OFFLINE mode
429    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
430      end-run around the C/Fortran linking horror in eesup/src/timers.F
431    o added pkg/runclock: allows user to terminate run based on wall clock
432    o added non-hydrostatic scaling parameter: nh_am2
433    o pkg/my82: futile attempt to make results compiler-independent by adding
434      some "_d 0", etc. no effect.
435    o for mnc output, fill the 'T' coordinate var with myTime and create a
436      separate 'iter' variable for iteration count
437    o pkg/diagnostics:
438      add new capability: output of Global/Regional & per-level statistics ;
439      tested against monitor output (including land & thSIce) on various exp.
440    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
441    
442    checkpoint57h_done
443      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
444      data.diagnostics, data.gchem, data.ptracers) is done.
445    
446    o pkg/diagnostics: prepare for Global/Regional statistics.
447      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
448    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
449      and rename it: DIFFERENT_MULTIPLE
450    
451    checkpoint57h_post
452    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
453    o pkg/diagnostics: change output frequency, now in seconds (instead
454      of Nb of iterations). This requires to change data.diagnostics.
455    checkpoint57h_pre
456    
457    o in mnc, let the user create the output dir if both mnc_outdir_date
458      and mnc_outdir_num are false
459    o add fflags() to pkg/diagnostics which allows one to specify, on a
460      per-file basis, the file precision [default behavior is unchanged]
461    o added diagnostics to pkg/kpp, including computation of mixed layer
462      depth based on a temperature/density criterion
463    o updated verification/natl_box to test the new pkg/kpp diagnostics
464    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
465    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
466    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
467      not mnc -- this mistake was found by JMC and is now corrected
468    
469    checkpoint57g_post
470    o add Adams-Bashforth 3rd Order time stepping:
471      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
472      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
473    checkpoint57g_pre
474    
475    o make lambda[Theta,Salt]ClimRelax spatially varying
476      (default remains spatially uniform constant based on tau)
477    o added new control variables
478      * init. uVel, vVel, etanN
479      * lambda[Theta,Salt]ClimRelax
480    o separate masks used for ctrl_pack/unpack 'from write_grid' output
481      (suggested by G. Forget)
482    
483    checkpoint57f_post
484    o add parameter "baseTime" = model base time = time at iteration zero
485      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
486      account for baseTime shift
487    o move Coriolis arrays from PARAMS.h to GRID.h
488    checkpoint57f_pre
489    
490    o mnc-ifying the seaice package
491    o introduced an alternative length scale calculation for use in the limiting
492      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
493    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
494    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
495      as well as grad(vort3).  Made it compatible with both approximate form
496      for the cubed sphere and full form of these gradients.  Added flag
497      useFullLeith to select between approximate and full form.  
498    o add "d0" in getcon.F to reduce differences between compilers/platforms
499      update output.txt of exp. fizhi-gridalt-hs
500    o change port_rand funtion to allow to set the seed.
501    o fix obscure MNC bug involving conversion between reals and integers
502      - it caused no problems with certain (eg. gcc, ifc) compilers but the
503        new version is now more standards-compliant
504    o adjoint-related modifications
505      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
506      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
507      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
508    
509    checkpoint57e_post
510    o Adding eddy stress controls a la Ferreira et al.
511    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
512    
513    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
514      update output.txt of exp. fizhi-gridalt-hs
515    o add more "Z" dimensions and associated coordinate vars to MNC
516    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
517    o parameter calendarDumps: when set, approximate months (30-31 days) and years
518      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
519      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
520      months and years.  Requires pkg/cal.
521    o diagnostics: add pickup functionality
522      - off by default for backwards compatibility
523      - current version only uses MDSIO -- MNC will be added
524    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
525    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
526    
527    checkpoint57d_post
528    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
529    o modify verification/ideal_2D_oce so that it tests the creation of mnc
530      output from the diagnostics package
531    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
532    o make genmake2 more portable by using ".$FS" instead of ".f" for more
533      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
534    o add coordinate variables to the MNC output from the diagnostics package
535    o change MNC-flags default value: true when useMNC=TRUE
536    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
537      the ability (off by default) to read the grid information using MNC
538    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
539    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
540    o do snap-shot diagnostics at the middle of the time-interval (instead of
541      at the end).
542    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
543      new test for AIM with thSIce + slab-ocean
544    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
545    o move state variable diagnostics to the beginning of the time step ;
546      (note: still needs some work specially for snap-shot diagnostics)
547      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
548    
549    checkpoint57c_post
550    o Change testing option (-ieee) to get closer agreement between g77 & ifort
551    o generate new output.txt files on faulks with g77 & the new -ieee option
552    checkpoint57c_pre
553    
554    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
555      update output.txt of exp. global_ocean.90x40x15
556    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
557      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
558    o add saltFlux(+File) forcing capability with periodicExternalForcing
559    o allow to use pkg diagnostics for GM-Redi & ThSIce output
560    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
561    o improvements for the MNC output from DIAGNOSTICS:
562      - correct handling of the unlimitied dimension
563      - all dims now have associated coordinate variables
564      - variables located at U, V, and Corner ("Z") points are now written
565        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
566        *all* data points are output
567    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
568    o added pkg/seaice/seaice_monitor.F
569    o mdsio_readfield.F can now read files visible only to master MPI process.
570    o pkg/seaice: some test code for ice-modified ocean stress
571    o exf_getffields interpolation defaults to bilinear for all scalar forcing
572      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
573      spurious negative numbers for precipitation and humidity.  Will cause
574      some small numerical differences for integrations using pkg/exf/exf_interp.F.
575    o pkg/ctrl/
576      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
577        May be enabled via doPackDiag
578      *  introduce z-scaling of
579         + gradient (doZscalePack) and
580         + control (doZscaleUnpack)
581    o pkg/mdsio/
582      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
583      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
584    
585    checkpoint57b_post
586    o simplify options in diagnostics_fill arguments (remove weird combinations)
587    o fix MNC coordinate variables so that they now contain per-face index
588      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
589      general, EXCH2 grids are only aligned to a "local" coordinate system
590    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
591    o Implement instantaneous output within pkg diagnostics:
592      setting a negative frequency in data.diagnostics produces
593     "snap-shot" output (as opposed to time-average if freq > 0)
594    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
595      NOTE: change ptracer diagnostics name: use 2 characters to work with
596            more than 9 tracers. Add also diagnostics of advect & diffus flux.
597    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
598      becomes the coordinate variable for the 'T' dimension
599    o add CF-style coordinate variables to MNC
600      - just a first cut:  numbers are meaningless on the cubesphere and
601        missing along the T axis but otherwise it works!
602    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
603    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
604    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
605      this is based directly on what the model compute, so that the content of
606      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
607    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
608    o clean up build options files for SunOS, in particular
609      - remove -traditional from xmakedepend
610      - change -xarch=v9 to -xarch=native for f77
611      - restore use of make (not gmake)
612      - add CC=gcc if using g77
613    o changes per discussion of AM, JMC, & EH3 today:
614      - move redundant "grid" variables out of "state" -- in preparation of
615        creating proper CF-style coordinate variables and in recognition
616        that any/all grid variables can be easily copied (eg. w/NCO) from
617        the grid files into any of the other NetCDF files
618      - *always* output grid variables with MDSIO (this will eventually be
619        changed)
620      - output MNC grid file if useMNC is true
621    o every instance of _END_MASTER() has been found and replaced with
622      _END_MASTER( myThid ) in order to satisfy certain picky Sun
623      preprocessors
624    o re-arrange diagnostics pkg initialisation:
625     - allow each package to extend the available diagnostics list
626     - add some checking and fix small problems (multi-threaded, ...)
627     - new S/R diagnostics_fill (replace fill_diagnostics):
628       look through the short list of active diag. (instead of the long list)
629       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
630    
631    checkpoint57a_post
632    o this set of changes restores TAMC compatibility
633      tested for global_ocean.90x40x15 adjoint on trough
634      (what a pain)
635    
636    checkpoint57a_pre
637    o some modifs in tools/build_options for sunos
638    o call ctrl_pack for ctrl at end for optimcycle=0
639    
640    checkpoint57
641    o add horizontal bi-harmonic viscosity for vertical velocity
642      - new parameter viscA4W (defaults to viscA4)
643      - affects only non-hydrostatic code
644      - to be done: no-slip lateral boundary conditions
645    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
646    o implement Implicit Vertical advection for pTracers
647    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
648      (implemented also for implicit vertical diffusion & advection)
649    o OBCS: extend application of tracer open boundary conditions
650      to a strip beyond the boundary of width Olx/Oly
651    o add call monitor to TAF set of required calls (flow directives)
652      and include in natl_box_adjoint
653    o untangle a few ifdefs related to cost, ctrl, autodiff
654      untangel a few ALLOW_ECCO_OPTIMIZATION
655    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
656      (theta2, salt2 in ecco_cost_weights)
657    
658    checkpoint56c_post
659    o OBCS as control variables
660      - update ctrl_ad_diff.list, obcs_ad_diff.list
661      - remove balance of obcs controls from default
662      - fix index bug nobcs in ctrl_init
663      - fix dummy fields filen in ctrl_pack
664      - add dummy weights for obcs
665    o lsopt: comment out fort.94 output
666    o optim:
667      - remove unnecessary header files
668      - adjusted namelists
669      - add xerbla.F to Makefile
670    o exf:
671      - multiple modifications of exf_check_range
672      - unit change in exf_init_runoff from [m/year] to [m/s]
673    o mdsio:
674      - i/o-vector change debugLevel from debLevA to debLevB
675    
676    checkpoint56b_post
677    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
678      is called from DO_THE_MODEL_IO
679      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
680      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
681      - clean up PTRACERS_WRITE_TIMEAVE a little
682    o add another verification experiment that tests both the cfc-pkg and
683      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
684      reactive tendencies treated inline with regular timestepping
685    o testreport previously did a lousy job of comparing small numbers, so
686      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
687      implemented in the little c-progam tmp_cmpnum.c which is embedded in
688      testreport.
689    o ptracers_monitor: bug fix for MPI
690    
691    checkpoint56a_post
692    o GCHEM: finish reorganizating the package
693      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
694        (introduces another 3D-array for each passive tracer, but only if
695        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
696        gchemTendency is not needed because the timestep is done separately)
697      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
698      - GCHEM is now---more or less cleanly---separate from PTRACERS
699      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
700        so clear to me how that should be done in a general way.
701    o CFC: improve formatting of output in CFC_ATMOS
702    o PTRACERS:
703      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
704        that ALL experiments with ptracers enable can be checked. This makes
705        GCHEM_MONITOR obsolete.
706      - include a runtime parameter PTRACERS_monitorFreq that defaults to
707        monitorFreq
708      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
709    o add PTRACERS (PTR0[1-5]) to testreport output
710    o exf_check_range:
711      * default changed to .TRUE.
712      * will check values for niter0 if debLevA, every timestep if debLevB
713      * STOP in exf_check_range if 'out of range'
714      * range chosen generous to allow for potential extema
715      TBD: a version with stricter range
716           permitted range would be runtime parameters
717    o GMredi:
718      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
719      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
720      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
721    o GCHEM:
722      - move call to GCHEM_FORCING_SEP, so that it is now called before
723        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
724      - introduced a useGCHEM runtime flag and applied it everywhere.
725      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
726        this flag is now only visible within GCHEM-pkg routines.
727      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
728        be replaced by a 3D array that is computed before thermodynamics; for
729        this, the tracer ID iTracer had to be included into the parameter list
730        of ptracers_forcing
731      - set up forward_step to call gchem_forcing, that will replace
732        gchem_forcing_int in ptracers_forcing
733      - cleaning up
734    o small cleaning of exch2: remove files that are also in eesupp/src
735    
736    checkpoint56
737    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
738    o mnc: cleanup "full" files--fixes out-of-memory problem
739    o ECCO-GODAE
740      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
741      * fully merged and updated from SIO code
742        windstress sign change affects
743        - exf_inscal_[u/v]stress
744        - sign of xx_tau[u/v] adjustments
745        - signs in cost_scat
746      * ctrl_get_gen: avoid update of tau[u/v] for first few days
747      * natl_box_adjoint updated and compressed
748      * 2-level checkpoint switch added
749        (tested in EXP. 1 of natl_box_adjoint)
750      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
751    o SVD
752      * first complete, non-hacked version for SVD calculations
753      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
754        performed via direct access files admtlm_vector.it????
755        (via ctrl_[un]pack)
756      * optimcycle is used for ARPACK iteration counter
757        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
758      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
759        and add linear transforms where necessary
760      * controls are initial/final SST, SSS (can be extended; need to check
761        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
762    o mdsio: filename info to both stderr, stdout
763    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
764      from sign change
765    
766    checkpoint55j_post
767    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
768      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
769    o add consistent build directories and .cvsignore files to verification
770    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
771    o make all subroutines 30 or less characters in length for certain older
772      compilers to work (a thorough search only turns up two routines in
773      pkg/ptracers)
774    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
775      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
776    
777    checkpoint55i_post
778    o change arrays for total vertical diffusivity (2.D if explicit,
779      3.D if implicit) ; each ptracer uses its own background value.
780    o added mnc/NetCDF output capability to ocn_compon_interf
781      - added bits to verification/cpl_aim+ocn so that it can run on
782        ITRDA and other clusters without the mpirun "-wd" option
783    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
784      configuration
785    o give MNC the ability to create additional files rather than
786      exceeding a specified file size limit "MNC_MAX_FILESIZE"
787      - the default is just less than 2GB which is a practical limit
788        on many systems
789    o Compute the non-local term using either KPP vertical diffusivity (=default)
790       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
791    
792    checkpoint55h_post
793    o add verification test "vermix"
794    o remove all the *_ioinc flags and replace with the single global
795      outputTypesInclusive flag
796    o allow to set a vertical profile of vertical diffusivity for T & S
797    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
798    o useMNC moved from data.mnc to data.pkg
799    
800    checkpoint55g_post
801    o Renaming carbon AD experiments to comply with testreport conventions
802    o Updating adjoint of Held-Suarez hs94.1x64x5
803    o Fixing directives for non-ECCO forward_step, after ECCO directives
804      have been fixed to avoid recomp. of do_oceanic_phys
805      Works well for global_ocean.90x40x15,
806      but recomp. issue remains for carbon
807    o Updating adjoint output for natl_box_adjoint after
808      pkg/ecco has been modified (see taga c55d_post)
809    
810    checkpoint55f_post
811    o rename to timeave_init_fixed
812    
813    checkpoint55e_post
814    o some delicate re-shuffle of store directives to avoid one
815      extra call of do_oceanic_physics
816      affects ecco_the_main_loop.F, do_oceanic_physics.F
817      checkpoint_lev1_directives.h
818    o NB: this may break global_ocean adjoint temporarily,
819      but it is clear how to fix it. Will do later, need this now.
820    
821    checkpoint55d_post
822    o ECCO specific cost function terms (up-to-date with 1x1 runs)
823    o ecco_cost_weights is modified to 1x1 runs
824    o modifs to allow observations to be read in as
825      single file or yearly files
826    o enable to read exf forcing fields as either
827      single file or yearly files (flag useExfYearlyFields)
828    checkpoint55d_pre
829    
830    o switch between 2-level and 3-level checkpointing
831    o add ability of MNC to write local and "partial" (eg. 2D slices where
832      the full 3D field is never actually stored) arrays to NetCDF files
833      with the correct (that is, the complete multi-dimensional) set of
834      array indicies
835      - used in mom_vecinv() to write the diagFreq output
836      - tested (demonstrated) in verification/aim.5l_cs
837    o further mnc-ification
838      - add verification/lab_sea to the list with mnc setups
839      - fix undefined mnc v-names in cd_code
840      - add kpp to mnc output (both snapshot and timeave)
841    o non-hydrostatic code
842      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
843        in calc_gw.F
844      - defaults to viscAh
845      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
846        friction or Leith) in non-hydrostatic mode, as long as there is
847        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
848    o pkg/cost
849      extend simple cost functions to treat time mean quantities
850      (T,U,V) via cost_accumulate_state from cost_tile
851    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
852        be 2 times larger than the minimum size the advection scheme requires.
853        now get a perfect conservation of salt in advect_cs test-exp (updated)
854    o GGL90 (Gaspar's TKE mixed layer)
855      - add horizontal diffusion of TKE, requires exchanges in
856        do_fields_blocking_exchanges, horizontal diffusivity is zero by
857        default. In OPA there is no horizontal diffusion of TKE but the
858        mixing coefficients are computed from a horizontal average of TKE of
859        6 points or so. I think that diffusion has a little more physical
860        justification.
861      - clean up ggl90_calc in the hope of reducing memory usage (this hope
862        was in vain)
863      - mask tke-variable in ggl90_init
864    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
865    o fix biharmonic diffusion on CS-grid.
866    o more obcs stuff
867      - added obcs_external_fields_load as an alternative to the EXF-pkg option
868        for reading boundary values. This routine is called from
869        obcs_prescribe_read
870      - updated obcs_check
871      - changed sponge layer relaxation parameter units for days to seconds
872      - turned off sponge layer by default
873      - changed argument list of OBCS_CALC to myTime+deltaTclock
874      - fixed about 35 bugs in obcs_external_fields_load
875    
876    checkpoint55c_post
877    o obcs stuff
878      - new runtime flags useOBCSprescribe, useOBCSbalance
879      - re-arranged obcs_calc
880      - moved exf_getobcs to obcs_prescibe_read
881        obcs_prescibe_read is called after ORLANSKI stuff
882        and independent of it (executable can contain all).
883      - updated obcs_check
884      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
885        These may be necessary only if tangential velocities are
886        prescribed at OB, not sure, needs testing.
887    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
888      which simplifies the calls and passes the ifc check-bounds test
889    
890    checkpoint55b_post
891    o add a 2D scalar, Z location, exchange_2 routine.
892    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
893      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
894      affects advect_cs results (for the wrong reason): update output.txt
895    o use a more standard discretization for biharmonic viscosity ;
896     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
897      affects results of dome set-up: update output.txt
898    o fix gad_advection.F (CubedSphere part), back to version 1.23
899    o fix bug in mom_vi_del2uv.F (CubedSphere part).
900    
901    checkpoint55a_post
902    o merged code to
903      * prescribe/read time-dependent open boundaries
904        (works in conjunction with exf, cal)
905      * sponge layer code for open boundaries
906      * each boundary N/S/E/W now has its own CPP option
907        (healthy for the adjoint)
908    
909    checkpoint55
910    o up-to-date adjoint of previous breaks
911      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
912      - global_ocean_ebm: adjoint still needs fix (TLM ok)
913      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
914      - carbon: * remove tr1-related adjoint verification
915                * add ptracer as control variable
916    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
917      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
918    
919    checkpoint54f_post
920    o in verification/carbin/ remove experiment related to
921      ALLOW_PASSIVE_TRACER (array tr1 etc)
922      code_ad/ input_ad/ results_ad
923    
924    o add two new packages
925      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
926        + subject to optimization (memory)
927      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
928        + subject to reordering (many GOTOs in the original code)
929        + so far opps is called for every (i,j) point, and then operates in
930          the vertical; one may want to reorder the scheme in order operate in
931          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
932          fields)
933    o overhaul of IO so that we now have flags for MDSIO and/or MNC
934      - all verification tests compile and run with linux_ia32_g77
935      - defaults are compatible with current input files--nothing
936        should change if you were not previously using MNC
937      - MNC output has been added in numerous places (eg. timeave)
938        but there are still a few writes not yet do-able with MNC
939        (this is in progress)
940      - flags now allow for either/or/both use of MDSIO and MNC and
941        documentation will soon follow
942      - numerous small formatting cleanups for ProTeX
943    o add version info (via BUILD_INFO.h) to MNC and stdout
944    
945    checkpoint54e_post
946    o add two new packages
947      - pp81 (Packanowski and Philander, 1981), Richardson number and
948        stratification dependent mixing
949      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
950      - these scheme operate in a similar manner as KPP (without ghat, of
951        course), however there is only one diffusivity that is used for both
952        temperature and salinity (and passive tracers)ç
953    o add offline package
954    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
955      provided by Stephanie Dutkiewicz
956    o genmake2: add ability to search for C compilers and cleanup test output
957      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
958    
959    checkpoint54d_post
960    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
961    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
962      leading to additional shift by 5 days each year of integration
963       (i.e. leading to considerable offset over the years)
964    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
965    o start with no AB and no initial filtering (staggerTimeStep):
966      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
967    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
968      (external loading & cpl import/export stay in forward_step.F)
969    o update coupling interface to work with new staggerTimeStep
970    o change MDSIO ptracers_pickup.
971    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
972    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
973    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
974    
975    checkpoint54c_post
976    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
977      this affects (truncation error) output.txt of test-exp:
978       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
979    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
980    o change Qnet to always be the net heat flux, (+upward).
981      affects (truncation error) output of natl_box exp.: updated
982    o define the max number of passive tracers in PTRACERS_SIZE.h
983    o start to test mnc routinely in exp0
984    o add sea-ice loading (sIceLoad) as a new forcing field.
985    
986    checkpoint54b_post
987    o add testreport "-j JOBS" option for parallel builds (tested and pretty
988       impressive on Altix and Opteron systems)
989    o diagnostics can now write NetCDF files through the mnc package
990    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
991    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
992    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
993      affects (truncation error) output of lab_sea & natl_box exp.: updated
994    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
995    
996    checkpoint54a_post
997    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
998    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
999    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1000    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1001      + internal_wave (shift in writing cg2d_ini_res)
1002    checkpoint54a_pre
1003    
1004    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1005      - modified verification/lab_sea and natl_box_adjoint accordingly
1006    
1007    checkpoint54
1008    checkpoint53g_post
1009    o prepare splitting of thermodynamics: store convect.counter in common block
1010    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1011      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1012    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1013    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1014    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1015    o restore adjointability
1016    
1017    checkpoint53f_post
1018    o modifications that affect AIM experiment results (update output.txt):
1019      - no advection of S at top interface Nr (pkg/generic_advdiff)
1020      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1021    o AIM pkg:
1022      - include stability function into surf.Flux derivative relative to Tsurf
1023      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1024    
1025    checkpoint53e_post
1026    o merged cylindrical coord configuration
1027    o added rotating_tank experiment
1028    checkpoint53e_pre
1029    
1030    checkpoint53d_post
1031    o faulks upgraded: re-generate output.txt that have changed:
1032       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1033    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1034    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1035    o added Sadourny discretization of Coriolis
1036      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1037      - re-enabled use of omega3 (useAbsVorticity)
1038    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1039      vector-invariant equations
1040      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1041    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1042      hopefully without new bugs
1043      - still to do: biharmonic friction for non-hydrostatic w
1044    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1045    o regenerated output for global_ocean_ebm (using -ieee)
1046    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1047      of mom_common/
1048      - simple re-arrangement of instructions within computing loop
1049    checkpoint53d_pre
1050    
1051    checkpoint53c_post
1052    o new version of coupler for AIM+thSIce and Ocean models
1053     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1054     - land: change Evaporation of snow
1055     - aim with thSIce: fix bug in snow-precip.
1056    o changes to calc_gw.F
1057     - bug fix for w^2 term near the bottom boundary
1058     - (hopefully) improve the lateral slip boundary condtions for use with
1059        partial/looped cells
1060      - because the bug fix changes two verification experiments anyway (exp5
1061        and plume on slope), change the lateral boundary condition from half slip
1062        to the value of no_slip_sides
1063    o ebm package wasnt quite up to the parallel task. Fixed that.
1064    o Adjoint of EBM package + verification
1065      * TLM OK
1066      * ADM not sufficient accuracy yet (needs further testing)
1067    
1068    checkpoint53b_post
1069    o Commiting new energy balance model to repository
1070      * package is pkg/ebm
1071      * verif. is verification/global_ocean_ebm
1072      * references are in ebm_driver.F
1073    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1074    C        Global thermohaline circulation. Part I:
1075    C        Sensitivity to atmospheric moisture transport.
1076    C        J. Climate 12(1), 71-82
1077    C      * X. Wang, P. Stone and J. Marotzke, 1999:
1078    C        Global thermohaline circulation. Part II:
1079    C        Sensitivity with interactive transport.
1080    C        J. Climate 12(1), 83-91
1081    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
1082    C        Destabilization of the thermohaline circulation
1083    C        by atmospheric eddy transports.
1084    C        J. Climate 7(12), 1870-1882
1085    o Will need long integration testing.
1086    checkpoint53b_pre
1087    
1088    o created pkg/mom_common in preparation for variable viscosity code
1089    o renamed and split ini_mnc_io
1090    o pkg/land: only liquid water can diffuse or run-off
1091    o AIM using land: soil wetness availability account for snow
1092    o added printMapIncludesZeros to EEPARMS namelist
1093    
1094    checkpoint53a_post
1095    o restore TAMC compatiility for exf_constants.h
1096      (no usage of _d in .h)
1097    o Additional storing in KPP in an attempt to fix
1098      TAMC problem with adjoint of KPP code.
1099      (no success...)
1100      Identical code works fine with TAF.
1101    o Fixed verification/natl_box_adjoint experiments.
1102      Initial conditions for Experiments 4 and 5 are now
1103      set to "SEAICE_initialHEFF=0", which is more reasonable,
1104      and hence gives results closer to that of Experiment 2.
1105      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
1106    
1107    checkpoint53
1108    o stable checkpoint with up to date adjoint
1109      TLM tests only run for 1st grdchk at the moment. Its unclear if
1110      this is a code problem or a problem with resetting code for g_
1111      variables that is being autogenerated wrong.
1112      Otherwise:
1113       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
1114       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
1115         are both still in chaos following their security messes.
1116    
1117    checkpoint52n_post
1118    o various build (mostly genmake2) changes including:
1119      - ability to build/run more easily within Cygwin and MacOS X
1120      - more complicated Makefiles with a stronger dependence on Gnu Make
1121    o pkg/seaice modifications
1122      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
1123        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
1124        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
1125      - changed proxy for geostrophic velocity and updated
1126        verification/lab_sea/results/* accordingly
1127      - removed ADI dynamic solver from pkg/seaice
1128      - replaced all occurrences of 1/CSTICE or 1/CSUICE
1129        they caused a segmentation fault under certain circumstances
1130      - removed unused field WATR
1131    o bug fix in exf-package:
1132      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
1133         now reflect that.
1134    o small fixes in the cal-package:
1135      - set reference date to first of January for the 'model'-calendar
1136      - failing of cal_CheckDate in cal_FullDate now actually results in a
1137        warning
1138    o small modifications in exf-package to increase flexibility:
1139      - change climtempfreeze from a constant to a runtime parameter that
1140        is specified in data.exf_clim (default = -1.9)
1141      - introduce runtime parameter windstressmax (default = 2.0) that is
1142        specified in data.exf
1143    o fix in pkg/thsice:
1144      - update Evap (Tsf changes) to be consistent with Latent heat flux
1145      - maintain snow precipitation unchanged (even if Tsf >=0).
1146     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
1147    
1148    checkpoint52m_post
1149    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
1150      this does not change any of the results, because myIter=0 in swfrac always
1151      lead to jwtype=2 (the default anyway), but the call makes little sense
1152      as a default
1153    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
1154    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
1155      atmospheric model (AIM) to use it ; add a "slab ocean" component.
1156    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
1157    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
1158    o extending useSingleCpuIO option to work with new exch2 I/O format
1159      - old-style, missing-tile I/O is still accessible by defining CPP
1160        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
1161    o monitor package can write to NetCDF files and/or STDOUT
1162    o fix re-definition bug in MNC_GRID_INIT_ALL()
1163    o doc/api_reference added
1164      - a framework for building an API Reference Manual using all
1165        the "protex" comments embedded in the code
1166      - see pkg/generic_advdiff, pkg/mnc for examples
1167    o MNC:
1168      - make myThid the last argument for all subroutines
1169      - new default for the grid files: NO halos
1170      - add useMNC and other run-time flags
1171      - separate per-file-group handling of the unlimited dimension
1172      - early initialization of MNC w/ flags read at the eeboot stage
1173        and lookup tables set in initialize_fixed
1174      - write all MNC output to a freshly-created directory
1175    o thermodynamics sea-ice (thsice) is now tested with testreport.
1176    o test exp. advect_cs: use the standard cs32 grid ; update output.
1177    o Added functionality to grdchk:
1178      pick global i,j,k position (or nearest wet) where to perform check.
1179    
1180    checkpoint52l_post
1181    o new land formulation:
1182      a) use ground enthalpy as prognostic variable to ensure exact
1183         energy conservation.
1184      b) account for water temperature and for latent heat of freezing
1185         in all processes (rain, run-off, ground storage)
1186      c) compute surface and ground temperature implicitly.
1187    o aim_v23 modification for new land model:
1188      a) Treat separately land / ocean / sea-ice surface fluxes
1189         to allow implicit computation of land & sea-ice surface temp.
1190      b) add snow precipitation.
1191    checkpoint52l_pre
1192    
1193    o fix problem (when 1 tile is empty) in min/max monitor.
1194    o fix bug in timeAve (u,vZetatave in common block)
1195    o no restoring terms under ice for pkg/seaice
1196    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
1197    o bug fix for pkg/seaice pickups
1198    o change MNC call locations and add coordinate attributes
1199    o mask vorticity at the corner ; affects global_ocean.cs output
1200    o fix ini_curvilinear_grid ; test CS experiments with mpi
1201    o aim.5l_cs: modify sea-ice fraction input file ; update output
1202    o exf: Adding simple range check routine for exf fields after read
1203    
1204    checkpoint52k_post
1205    o removed top-level directory "diags"
1206      - we migrated these functions to pkg/timeave a long time ago
1207    o fixed bug introduced in pkg/monitor
1208    o accuracy ctrlprec = 32 insuffient for gradient checks using
1209      averaged fields (I/O via cost_averages)
1210      -> use ctrl.h in active_file*.F to control I/O precision.
1211    o paramter list of CALL ADTHE_MAIN_LOOP
1212    o added initial do_the_model_io to ecco
1213    o set all ...Freq to zero after cost_final
1214      taveFreq, dumpFreq, pChkptFreq
1215    o MAIN and ECCO differentiability restored
1216    
1217    checkpoint52j_post
1218    o fix nchklev in tamc.h for global_ocean...
1219    o Bringing flow and store directives up-to-date
1220    o Really weird thing!
1221      call do_the_model_io from the_main_loop with parameters
1222      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1223      TAF places a faulty re-call of initialise_varia
1224      after cost_final call which should not be there!
1225    checkpoint52j_pre
1226    
1227    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1228      error messages
1229    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1230    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1231      debug output
1232    o modfied mdsio_writefield.F to handle non-global files under exch2
1233    o update AIM Cubed-Sphere exp (aim.5l_cs):
1234      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1235    o update AIM Equatorial Channel exp:
1236      use standard aim_v23 pkg and change the SST fields to be more realistic.
1237    o globalFile now works with exch2
1238    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1239      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1240    o limit timeave output for hi-res integrations
1241    
1242    checkpoint52i_post
1243    o removed CPP_EEOPTIONS.h from verification/*/code
1244    o updated the tiling for global_ocean_pressure
1245    checkpoint52i_pre
1246    
1247    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1248      the old pkg/aim).
1249    
1250    checkpoint52h_pre
1251    o shortened offending lines in exch2_send_rx?.template
1252    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1253    o genmake2: add build & execute test for NetCDF code
1254    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1255      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1256    o added useSingleCPUIO flag to monitor.F and mon_out.F
1257    o added temporary hack for sea-ice dynamics on the cube:
1258      metric terms are ignored and it is assumed that
1259      there is no sea-ice on cube faces 1, 2, 4, and 5.
1260    
1261    checkpoint52f_post
1262    o added exch2 cube routines to pkg/exch2
1263    o modified hs94.cs-32x32x5 to use it
1264    o added new grid files to hs94.cs-32x32x5
1265    checkpoint52f_pre
1266    
1267    checkpoint52e_post
1268    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1269      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1270    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1271      to work with implicit vertical advection and AB ;
1272    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1273    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1274     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1275    checkpoint52e_pre
1276    
1277    o fix bug in impldiff when Nr=1 or Nr=2.
1278    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1279    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1280    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1281      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1282    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1283    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1284    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1285    
1286    checkpoint52d_post
1287    o re-tiled many expts to allow comparison in multi-processor mode
1288      - updated output accordingly
1289      - changed hs94.128x64x5 to use intial T from file rather than use the
1290        random number generator
1291    o add infrastructure in model routines for fizhi and gridalt packages
1292    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1293    o changes to permit hi-res, cubed-sphere, configuration
1294      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1295      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1296      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1297        of surface winds for the cube
1298      (A verification experiment, based on global_ocean.cs32x15, but with
1299       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1300       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1301       complete with example surface forcing files and matlab scripts to look
1302       at the output and compare it with that of global_ocean.cs32x15.)
1303    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1304       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1305       to conform to the common rule.
1306    o check-in the first version of the coupler + interfaces for multi-components
1307       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1308       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1309       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1310       - ocean and atmos. share the same horizontal grid (no interpolation).
1311       - exchanges between component and coupler is done in forward_step
1312    o new verification experiment, cpl_aim+ocn:
1313       coupled ocean - AIM atmosphere on cs32 grid.
1314    
1315    checkpoint52d_pre
1316    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1317    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1318    
1319    checkpoint52c_post
1320    o Fixing OPTIONS files for use of exf:
1321      - ALLOW_ECCO not needed
1322      - ECCO_CPPOPTIONS.h should not be included from
1323        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1324        as has been the case in the past
1325      - All cal/exf related options are currently set in
1326        single header file. Should remain so until we
1327        agree on a consistent new policy.
1328    o Removed all CPP options for cal package.
1329      cal has no more CPP options.
1330    o modified STOREs in GAD_ADVECTION
1331    o corrected key comp. for passkey
1332    
1333    checkpoint52b_post
1334    o new version: "thsice" of thermodynamic sea-ice pkg:
1335     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1336     - modify fluxes but do not change theta directly;
1337     - light cleaning of bulk_force pkg (still needed with thsice).
1338     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1339       + output_thsice.txt to test thsice & bulk_force pkgs.
1340    o put back grid & coriolis monitor output.
1341    checkpoint52b_pre
1342    
1343    o call "do_the_model_io" at the beginning (=> dump initial state)
1344    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1345    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1346      (need info on NUMBER_OF_PTRACERS)
1347    o missing PTRACERS headers in some routines
1348    o default tamc.h in pkg/autodiff supposed to crash
1349      to ensure proper customization
1350    
1351    checkpoint52a_post
1352    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1353      - moved surfaceTendencyTice from pkg/seaice to main code
1354      - subroutine FREEZE_SURFACE now limits only surface temperature
1355        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1356        => new output.txt for global_ocean.cs32x15 & global_with_exf
1357      - keep the old version of FREEZE for backward compatibility;
1358        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1359      - corresponding modifs for TAF directives
1360    o added surface flux output variables to TIMEAVE_STATVARS
1361    o time-averaged output for pkg/ptracers
1362    o fix problem with ECCO-related divided adjoint
1363      snapshot file was missing some ad-variables,
1364      but no warning issued by TAF
1365    
1366    checkpoint52a_pre
1367    o some bug fixes for #undef REAL4_IS_SLOW
1368    
1369    checkpoint52 = ecco_c52_e35
1370    o after testing adjoints of checkpoint51u_post
1371    
1372    checkpoint51u_post
1373    o this is the post-merge tag of the ecco-branch
1374      (needs another clean checkout and re-testing)
1375    o various natl_box_adjoint configs and results
1376      but no input fields
1377    o obcs adjoint not yet merged!
1378    o adding ECCO global 1x1 and 2x2 degree configs
1379    o updated/extended some store directives for seaice
1380    o pkg/ecco now containes ecco-specific part of cost function
1381    o top level routines the_main_loop, forward_step
1382      supersede those in model/src/
1383      previous input data.cost now in data.ecco
1384      (new namelist ecco_cost_nml)
1385    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1386    
1387    checkpoint51t_post
1388    o this is the pre-merge tag of the ecco-branch
1389    
1390    checkpoint51s_post
1391    o cleanup: removed various obsolete #define-s
1392    o pkg/grdchk
1393      - renamed 'ph-grd 3' to 'grad-res'
1394      - merged from ecco-branch
1395        (remaining bug fixes for obcs gradient checks)
1396      - additional high-precision output for testreport
1397        (grep for 'precision_grdchk_result')
1398    
1399    checkpoint51r_post
1400    o cleaned up or removed CPP_OPTIONS.h files
1401    o updated results for some of the tests to reflect the new
1402      optfiles (-ieee: -O0 instead of -O3)
1403    
1404    checkpoint51q_post
1405    o cd_code:
1406      - moved cd_scheme.F -> cd_code_scheme.F
1407      - separate read_checkpoint from cd_code_ini_vars.F
1408      - separated cd_code part from write_checkpoint
1409      - updated AD_SOURCE, generated .flow
1410      - added CD_CODE_VARS.h to the_main_loop
1411      - Moving cd_code specific store dir.s to pkg/cd_code
1412    o ctrl package totally restructured
1413      - pack/unpack now optional and decoupled from
1414        xx_/adxx_ I/O
1415      - ctrl_pack/unpack cleaned
1416        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1417      - confined inclusion of AD_CONFIG.h to where necessary.
1418    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1419    
1420    checkpoint51p_post
1421    o create initial cd_code package
1422      - WARNING: the initialization of fields within packages
1423        is broken because INI_FIELDS (where READ_CHECKPOINT is
1424        called) is called *before* PACKAGES_INIT_VARIABLES.
1425        This seems to be backwards since
1426        1) its important to initially zero the entire field including
1427           the "halo" region
1428        2) zeroing needs to be done *before* reading pickup info
1429           and the pickup call might or might not happen in any
1430           particular run
1431      - this needs an overhaul for R2
1432    o cleanup verification/*/code/GMREDI_OPTIONS.h
1433    o cleanup testreport
1434    
1435    checkpoint51o_post
1436    o bringing AD-related verif's up to date with genmake2
1437      - carbon/
1438      - global_ocean.90x40x15/
1439      - hs.94.1x64x5/
1440      - (front_relax/ )
1441    o (more) consistent directory structure for AD-related verif.'s
1442    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1443    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1444    o bug fix in find_alpha.F for MDJWF:
1445      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1446        change rho -> rho-rhoConst
1447      - replace call find_rho to find_rhonum
1448    o initialisation of rFlx extended to full array (required by TAF)
1449      and shifted to thermodynamics
1450    o removed PTRACERS.h in ptracers routine
1451    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1452    o Correcting initialisations for fVerU, fVerV.
1453    o helping TAF to recognize dependency on kUp for
1454      fVerU, fVerV
1455    o Replacing delZ by delR in pkg/ctrl/
1456    checkpoint51o_pre
1457    
1458    o undid all of cp51 pending some cleanups and discussion
1459    o added the [#include "AD_CONFIG.h"] statement to all files that need
1460       it for adjoint/tl #defines
1461     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1462     o removed tools/genmake since it no longer works
1463    
1464    checkpoint51n_post
1465    o modifications to make FREEZE flux visible to pkg/kpp
1466      - moved surfaceTendencyTice from pkg/seaice to main code
1467      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1468      - subroutine FREEZE now limits only surface temperature
1469        (this means new output.txt for global_ocean.90x40x15,
1470         global_ocean.cs32x15, and global_with_exf)
1471    o added surface flux output variables to TIMEAVE_STATVARS
1472    
1473    checkpoint51n_pre
1474    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1475    o added [#include "AD_CONFIG.h"] to all files that use the following
1476      defines:
1477      - ALLOW_ADJOINT_RUN
1478      - ALLOW_TANGENTLINEAR_RUN
1479      - ALLOW_ECCO_OPTIMIZATION
1480    
1481    checkpoint51m_post
1482    o incorporating changes to get TAMC/TAF working in genmake2
1483      - added new TAMC/TAF targets to the Makefile
1484      - various cleanups related to package handling
1485      - these changes should have no impact on the forward model
1486    
1487    checkpoint51l_post
1488    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1489     - faster algorithm for cal_addtime.F
1490     - higher precision arithmetic, where needed
1491     - pkg/exf *startdate variables changed from calendar date to
1492       model integration time
1493    
1494    checkpoint51l_pre
1495    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1496    o enable to apply restoring on S & T only in a latitude band.
1497    o update output (external_forcing_surf modif. change truncation errors)
1498       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1499    
1500    checkpoint51k_post
1501    o change default to: useNHMTerms=.FALSE.
1502     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1503       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1504     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1505        exp1, ideal_2D_oce
1506     - change data file of oceanic exp (leave the results unchanged for now)
1507       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1508    o set gravitySign automatically according to the vertical coordinate used
1509      (and change sign: back to "logical" value: +1 when R increases downward)
1510    o added an include barrier to the default CPP_OPTIONS.h and
1511      removed the #include "PACKAGES_CONFIG.h" from it
1512    o fix a bug in mom_fluxform (from chk51j_post)
1513    
1514    checkpoint51j_post
1515    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1516    o adjusted some flow directives (dynamics, thermodynamics)
1517    o added cubed-sphere case to test cost function
1518    o heckpoint_lev?_directives.h now include
1519      pkg-specific directives, whenever those are enabled.
1520    o Moving pkg-specific flow directives to corresponding pkg
1521      Moving pkg-specific differentiation list to corresponding pkg
1522      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1523      ---> conventions are
1524           - pkg_ad.flow
1525           - pkg_ad_diff.list
1526           - pkg_ad_check_lev?_dir.h
1527    
1528    checkpoint51i_post
1529    o merge of the branch-genmake2
1530      - knowingly breaks the older genmake
1531      - automatic generation of all ALLOW_${PKG_NAME} defines
1532      - new testreport supersedes older testscript
1533    o large number of package inclusion and header cleanups
1534    checkpoint51i_pre
1535    
1536    o new output for adjoin of global ocean vector invariant
1537    o fix for checkpoint of thermodynamic seaice and bulk_force
1538    o Steph gchem various cleanups
1539    
1540    checkpoint 51h_pre
1541    o fixed some single quotes
1542    o modify gchem pkg to be more versatile
1543    o modifications to clean up dic pkg
1544    o add pkg/cfc
1545    
1546    checkpoint51g_post
1547    o provide links for ARPACK and ADM*TLM
1548    o start removing verification/vero/
1549    o update AD-related stuff
1550      (in particular some IF-statements in model/src/ routines)
1551    o adding to verification/global_ocean.90x40x15/ adjoint of
1552      vector invariant setup
1553    
1554    checkpoint51f_post
1555    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1556    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1557      of tracer Green's fucntions for ocean inversion project.
1558    
1559    checkpoint51f_pre
1560    o Added on-the-fly spatial interpolation capability
1561        "USE_EXF_INTERPOLATION" to pkg/exf.
1562      - This is a temporary Cartesian-grid hack until
1563        the super-duper ESMF coupler becomes available.
1564      - See verification/global_with_exf/README for usage example.
1565      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1566        flags and modified pkg/seaice accordingly.
1567    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1568        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1569        non-local transport term.
1570    
1571    checkpoint51e_post
1572    o pkg/mom_vecinv:
1573      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1574      - add time-ave diagnostic of vorticity advection.
1575    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1576    o atmospheric geopotential: - include water vapor effect;
1577                                - use p^kappa in p* scaling.
1578    o land pkg: read initial state from files.
1579    o AIM : add stratospheric drag in the upper level
1580    
1581    checkpoint51d_post
1582    o change function ILNBLNK (=> last non-blank char.) to return zero
1583      (instead of the string length) when the string. char is empty
1584  o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)  o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1585    o modif's to restore TAMC compatibility
1586      - avoid "_d" constructs in PARAMETER declarations
1587      - avoid interrupting lines by comment lines
1588    o Use cluster local disks for purely local I/O
1589      vs. globally visible disks needed for ctrl stuff
1590      (merged from ecco-branch)
1591      - new active_file_loc... and mdsio_..._loc routines
1592      - affected packages: autodiff, ctrl, grdchk, mdsio
1593    
1594  checkpoint51c_post  checkpoint51c_post
1595  o introducing integer flag debugLevel  o introducing integer flag debugLevel

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