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revision 1.41 by heimbach, Fri Jul 13 18:08:14 2001 UTC revision 1.565 by baylor, Mon Oct 10 19:49:48 2005 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 Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
8      to be proportional to enstrophy dissipation length.  Thus,
9       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
10      This is now consistent with Smagorinsky and with the manual.
11    
12    checkpoint57u_post
13    o OBCS and PTRACERS: add open boundary support for passive tracers
14      - either use homogenous (pseudo) v.Neumann conditions or prescribe
15        OB-values from file; this is not different from the way theta and salinity
16        are treated
17      - however, Orlanski-radiation conditions are not supported, and the model
18        will stop if you use pTracers and Orlanski at the same time.
19      - beefed up the rountine obcs_external_fields_load: now only those open
20        boundary values are overwritten with values from files for which there
21        are really files, otherwise the OB-fields remain untouched. This makes
22        it possible to use different OBs at different ends of the domain (as
23        with EXF)
24    o reduce number of exch calls in shap_filt (s2).
25    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
26      truncation level) 4/5 MLAdjust test results (11&12 digits match).
27    
28    checkpoint57t_post
29    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
30    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
31      same truncation, independent of the face number: affects affects several
32      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
33    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
34      note that biharmonic viscosity + no-slip was not tested in any experiment.
35    o fix bug in non-linear free-surf side-drag ; generate new output for
36      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
37    o make mnc honor the writeBinaryPrec flag for most kinds of output
38    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
39    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
40      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
41    o add brackets in multi-terms sum to get same truncation, independent of
42      the face number (manage to get exactly same value of gU,gV at the cs-edge)
43      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
44    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
45      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
46      a maximum grid-scale Reynolds number.  Also, changes all length calculations
47      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
48      Suggested values of viscosity parameters found in mom_calc_visc.
49      Many new viscosity diagnostics available.
50    
51    checkpoint57s_post
52    o Add clearing-house for viscosity calculations, mom_calc_visc and
53      correct numerous bugs in LeithD and Smagorinsky discretizations.  
54      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
55      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
56      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
57      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
58      The Strain-Tension form is now called with useStrainTensonVisc=.true.
59      ViscAhStrain and viscAhTension are now retired.
60    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
61    o In response to JMC's bug report, genmake2 now ignores any soft-links
62      that it finds in the *current* directory when searching for files.
63      Soft-links found in any other source directories will still work as
64      they did before.
65    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
66      a C routine to unlimit the stack size
67    o mnc-ify pkg/aim snapshot vars
68    o mnc-ify pkg/land as requested by Daniel
69    o various changes to mnc including:
70      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
71      - output can now be grouped so that all files within a group
72          change the ITER portion of their names in lock-step together
73      - can now read ("global") PER-FACE (in addition to PER-TILE) files
74          and works with both EXCH1 and EXCH2 (but needs more testing)
75      - writing works for all verification test cases w/ g77 on Linux
76    
77    checkpoint57r_post
78    o make MNC variable initialization happen earlier
79    o add diagnostics for (almost) each term of the momentum Eq.
80    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
81    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
82    o remove MINIMAL_TAVE_OUTPUT option ;
83      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
84    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
85      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
86    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
87    o add time-dependent SST, SSS control
88    o cost terms in ecco/ modularized (new cost_generic.F)
89    o cost_averages routines are modularized (new cost_averagesgeneric.F)
90    o new infrastructure for seaice model vs. obs misfits in seaice/
91      * driver from the_main_loop.F is seaice_cost_driver.F
92      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
93      * gradient check in Exp. 6a of natl_box_adjoint/
94    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
95      (see README file)
96    
97    checkpoint57q_post
98    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
99    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
100      - bug was reported by Jean-Michel and Ian Fenty
101    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
102      update exp. cpl_aim+ocn output.
103    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
104      Needed for high-res. runs with large global files
105      to be able to limit tapelev size
106    o Changed some tests for adjoint:
107      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
108      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
109      * global_ocean.90x40x15/ back to default 3-level checkpointing
110    o Modifications to enable scripted COMMON to MODULE conversion
111      * verification/OpenAD/code/ has necessary scripts and description;
112      * converts, compiles and runs successfully;
113    
114    checkpoint57p_post
115    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
116    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
117      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
118    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
119    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
120      (was already the case for dissipation with mom_vecinv,
121       and also the case for grad.PhiHyd when staggered-timeStep)
122      This will allow to put dissipation out-off the AB time-stepping.
123     Unfortunately, affects truncation error. Update output of exp. that "fails"
124      (cg2d matching number) and leave the others for later: front_relax(10),
125      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
126      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
127    
128    checkpoint57o_post
129    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
130      (2) its ready to be documented during the 20050801 DocFest
131    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
132      for ideal_2D_oce and lab_sea on linux_ia32_g77
133    o set to #undef CTRL_SET_OLD_MAXCVARS_30
134      in global1x1_tot/code_seaice_adj to access indices 32, 33
135      (worth another tag)
136    
137    checkpoint57n_post
138    o adding precip control xx_precip 32
139    o adding swflux control xx_swflux 33
140    o Replacing 10 forcing penalty cost routines by 1 generic.
141    o Implementing partitioning in time-mean and variable adjustment
142      for atmos. state.
143    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
144    o in natl_box_adjoint:
145      * updated exp 1 to 10
146        (but does not have time-mean vs. variable split results yet)
147    o updated global1x1/*_seaice_adj/
148      to incorporate latest changes
149    o enable useSingleCpuIO for mdsio vector routines
150      (applies in particular to tapelev I/O)
151    o removed inefficient K-loop in all active_file*control*.F
152    
153    checkpoint57m_post
154    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
155      and advect_cs (use EXCH-2 and standard cs-32 grid files).
156    o pkg/exch2: filling of face-corner halo regions is optional
157      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
158    
159    checkpoint57l_post
160     tag before updating tutorials (pre-release-2)
161    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
162       for output and interpolation of input fields onto model grid)
163    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
164       Affects results of exp. rotating_tank ; update output.txt.
165    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
166          and taking the square quantity and/or using a fraction-weight field.
167    o fix aim_diagnostics_init.F mate numbers.
168    o add mnc output capability to diagnostics/diagstat and update
169      our cvsignore files for the ACSII output generated
170    
171    checkpoint57k_post
172    o lab_sea now uses diagnostics package and provides a suite of
173      new EXF diagnostics output.
174    
175    checkpoint57j_post
176    o exf
177      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
178        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
179        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
180      * extended diagnostics output
181        - now includes all EXF variables
182        - hs, hl moved to common block
183        - separate S/R for diagnostics, called after ctrl vector is added
184        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
185        - EXFqnet contains true Qnet (i.e. includes qsw)
186      * updated verif. lab_sea, global_with_exf
187      * Rearranging hflux (exf_mapfields -> exf_getforcing)
188        to ensure that diagnostics sees a true EXFqnet
189    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
190    o diagnostics pkg: change pointers so that 1 diagnostic can be used
191      several times with different frequencies.
192    o mnc-ify the thsice package as requested by Daniel Enderton
193      - the monitor--MNC output needs work
194      - many attributes need to be added (most are currently blank)
195    o mnc-ify theaim_v23 package as requested by Daniel Enderton
196      - many attributes need to be added (most are currently blank)
197    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
198    o add Sadourny like discretization to the 4th.O vorticity advection scheme
199    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
200      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
201         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
202    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
203     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
204    
205    checkpoint57i_post
206    o Diagnostics package was changed: diagnostic allocation is now deactivated
207      by setting an empty file name in the namelist (used to be by setting 0 frequency)
208    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
209      add 1rst Order upwind vertical Shear.
210    o add a quick fix for A/B checkpointing in OFFLINE mode
211    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
212      end-run around the C/Fortran linking horror in eesup/src/timers.F
213    o added pkg/runclock: allows user to terminate run based on wall clock
214    o added non-hydrostatic scaling parameter: nh_am2
215    o pkg/my82: futile attempt to make results compiler-independent by adding
216      some "_d 0", etc. no effect.
217    o for mnc output, fill the 'T' coordinate var with myTime and create a
218      separate 'iter' variable for iteration count
219    o pkg/diagnostics:
220      add new capability: output of Global/Regional & per-level statistics ;
221      tested against monitor output (including land & thSIce) on various exp.
222    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
223    
224    checkpoint57h_done
225      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
226      data.diagnostics, data.gchem, data.ptracers) is done.
227    
228    o pkg/diagnostics: prepare for Global/Regional statistics.
229      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
230    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
231      and rename it: DIFFERENT_MULTIPLE
232    
233    checkpoint57h_post
234    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
235    o pkg/diagnostics: change output frequency, now in seconds (instead
236      of Nb of iterations). This requires to change data.diagnostics.
237    checkpoint57h_pre
238    
239    o in mnc, let the user create the output dir if both mnc_outdir_date
240      and mnc_outdir_num are false
241    o add fflags() to pkg/diagnostics which allows one to specify, on a
242      per-file basis, the file precision [default behavior is unchanged]
243    o added diagnostics to pkg/kpp, including computation of mixed layer
244      depth based on a temperature/density criterion
245    o updated verification/natl_box to test the new pkg/kpp diagnostics
246    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
247    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
248    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
249      not mnc -- this mistake was found by JMC and is now corrected
250    
251    checkpoint57g_post
252    o add Adams-Bashforth 3rd Order time stepping:
253      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
254      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
255    checkpoint57g_pre
256    
257    o make lambda[Theta,Salt]ClimRelax spatially varying
258      (default remains spatially uniform constant based on tau)
259    o added new control variables
260      * init. uVel, vVel, etanN
261      * lambda[Theta,Salt]ClimRelax
262    o separate masks used for ctrl_pack/unpack 'from write_grid' output
263      (suggested by G. Forget)
264    
265    checkpoint57f_post
266    o add parameter "baseTime" = model base time = time at iteration zero
267      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
268      account for baseTime shift
269    o move Coriolis arrays from PARAMS.h to GRID.h
270    checkpoint57f_pre
271    
272    o mnc-ifying the seaice package
273    o introduced an alternative length scale calculation for use in the limiting
274      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
275    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
276    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
277      as well as grad(vort3).  Made it compatible with both approximate form
278      for the cubed sphere and full form of these gradients.  Added flag
279      useFullLeith to select between approximate and full form.  
280    o add "d0" in getcon.F to reduce differences between compilers/platforms
281      update output.txt of exp. fizhi-gridalt-hs
282    o change port_rand funtion to allow to set the seed.
283    o fix obscure MNC bug involving conversion between reals and integers
284      - it caused no problems with certain (eg. gcc, ifc) compilers but the
285        new version is now more standards-compliant
286    o adjoint-related modifications
287      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
288      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
289      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
290    
291    checkpoint57e_post
292    o Adding eddy stress controls a la Ferreira et al.
293    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
294    
295    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
296      update output.txt of exp. fizhi-gridalt-hs
297    o add more "Z" dimensions and associated coordinate vars to MNC
298    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
299    o parameter calendarDumps: when set, approximate months (30-31 days) and years
300      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
301      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
302      months and years.  Requires pkg/cal.
303    o diagnostics: add pickup functionality
304      - off by default for backwards compatibility
305      - current version only uses MDSIO -- MNC will be added
306    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
307    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
308    
309    checkpoint57d_post
310    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
311    o modify verification/ideal_2D_oce so that it tests the creation of mnc
312      output from the diagnostics package
313    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
314    o make genmake2 more portable by using ".$FS" instead of ".f" for more
315      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
316    o add coordinate variables to the MNC output from the diagnostics package
317    o change MNC-flags default value: true when useMNC=TRUE
318    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
319      the ability (off by default) to read the grid information using MNC
320    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
321    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
322    o do snap-shot diagnostics at the middle of the time-interval (instead of
323      at the end).
324    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
325      new test for AIM with thSIce + slab-ocean
326    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
327    o move state variable diagnostics to the beginning of the time step ;
328      (note: still needs some work specially for snap-shot diagnostics)
329      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
330    
331    checkpoint57c_post
332    o Change testing option (-ieee) to get closer agreement between g77 & ifort
333    o generate new output.txt files on faulks with g77 & the new -ieee option
334    checkpoint57c_pre
335    
336    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
337      update output.txt of exp. global_ocean.90x40x15
338    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
339      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
340    o add saltFlux(+File) forcing capability with periodicExternalForcing
341    o allow to use pkg diagnostics for GM-Redi & ThSIce output
342    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
343    o improvements for the MNC output from DIAGNOSTICS:
344      - correct handling of the unlimitied dimension
345      - all dims now have associated coordinate variables
346      - variables located at U, V, and Corner ("Z") points are now written
347        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
348        *all* data points are output
349    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
350    o added pkg/seaice/seaice_monitor.F
351    o mdsio_readfield.F can now read files visible only to master MPI process.
352    o pkg/seaice: some test code for ice-modified ocean stress
353    o exf_getffields interpolation defaults to bilinear for all scalar forcing
354      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
355      spurious negative numbers for precipitation and humidity.  Will cause
356      some small numerical differences for integrations using pkg/exf/exf_interp.F.
357    o pkg/ctrl/
358      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
359        May be enabled via doPackDiag
360      *  introduce z-scaling of
361         + gradient (doZscalePack) and
362         + control (doZscaleUnpack)
363    o pkg/mdsio/
364      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
365      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
366    
367    checkpoint57b_post
368    o simplify options in diagnostics_fill arguments (remove weird combinations)
369    o fix MNC coordinate variables so that they now contain per-face index
370      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
371      general, EXCH2 grids are only aligned to a "local" coordinate system
372    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
373    o Implement instantaneous output within pkg diagnostics:
374      setting a negative frequency in data.diagnostics produces
375     "snap-shot" output (as opposed to time-average if freq > 0)
376    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
377      NOTE: change ptracer diagnostics name: use 2 characters to work with
378            more than 9 tracers. Add also diagnostics of advect & diffus flux.
379    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
380      becomes the coordinate variable for the 'T' dimension
381    o add CF-style coordinate variables to MNC
382      - just a first cut:  numbers are meaningless on the cubesphere and
383        missing along the T axis but otherwise it works!
384    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
385    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
386    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
387      this is based directly on what the model compute, so that the content of
388      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
389    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
390    o clean up build options files for SunOS, in particular
391      - remove -traditional from xmakedepend
392      - change -xarch=v9 to -xarch=native for f77
393      - restore use of make (not gmake)
394      - add CC=gcc if using g77
395    o changes per discussion of AM, JMC, & EH3 today:
396      - move redundant "grid" variables out of "state" -- in preparation of
397        creating proper CF-style coordinate variables and in recognition
398        that any/all grid variables can be easily copied (eg. w/NCO) from
399        the grid files into any of the other NetCDF files
400      - *always* output grid variables with MDSIO (this will eventually be
401        changed)
402      - output MNC grid file if useMNC is true
403    o every instance of _END_MASTER() has been found and replaced with
404      _END_MASTER( myThid ) in order to satisfy certain picky Sun
405      preprocessors
406    o re-arrange diagnostics pkg initialisation:
407     - allow each package to extend the available diagnostics list
408     - add some checking and fix small problems (multi-threaded, ...)
409     - new S/R diagnostics_fill (replace fill_diagnostics):
410       look through the short list of active diag. (instead of the long list)
411       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
412    
413    checkpoint57a_post
414    o this set of changes restores TAMC compatibility
415      tested for global_ocean.90x40x15 adjoint on trough
416      (what a pain)
417    
418    checkpoint57a_pre
419    o some modifs in tools/build_options for sunos
420    o call ctrl_pack for ctrl at end for optimcycle=0
421    
422    checkpoint57
423    o add horizontal bi-harmonic viscosity for vertical velocity
424      - new parameter viscA4W (defaults to viscA4)
425      - affects only non-hydrostatic code
426      - to be done: no-slip lateral boundary conditions
427    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
428    o implement Implicit Vertical advection for pTracers
429    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
430      (implemented also for implicit vertical diffusion & advection)
431    o OBCS: extend application of tracer open boundary conditions
432      to a strip beyond the boundary of width Olx/Oly
433    o add call monitor to TAF set of required calls (flow directives)
434      and include in natl_box_adjoint
435    o untangle a few ifdefs related to cost, ctrl, autodiff
436      untangel a few ALLOW_ECCO_OPTIMIZATION
437    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
438      (theta2, salt2 in ecco_cost_weights)
439    
440    checkpoint56c_post
441    o OBCS as control variables
442      - update ctrl_ad_diff.list, obcs_ad_diff.list
443      - remove balance of obcs controls from default
444      - fix index bug nobcs in ctrl_init
445      - fix dummy fields filen in ctrl_pack
446      - add dummy weights for obcs
447    o lsopt: comment out fort.94 output
448    o optim:
449      - remove unnecessary header files
450      - adjusted namelists
451      - add xerbla.F to Makefile
452    o exf:
453      - multiple modifications of exf_check_range
454      - unit change in exf_init_runoff from [m/year] to [m/s]
455    o mdsio:
456      - i/o-vector change debugLevel from debLevA to debLevB
457    
458    checkpoint56b_post
459    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
460      is called from DO_THE_MODEL_IO
461      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
462      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
463      - clean up PTRACERS_WRITE_TIMEAVE a little
464    o add another verification experiment that tests both the cfc-pkg and
465      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
466      reactive tendencies treated inline with regular timestepping
467    o testreport previously did a lousy job of comparing small numbers, so
468      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
469      implemented in the little c-progam tmp_cmpnum.c which is embedded in
470      testreport.
471    o ptracers_monitor: bug fix for MPI
472    
473    checkpoint56a_post
474    o GCHEM: finish reorganizating the package
475      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
476        (introduces another 3D-array for each passive tracer, but only if
477        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
478        gchemTendency is not needed because the timestep is done separately)
479      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
480      - GCHEM is now---more or less cleanly---separate from PTRACERS
481      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
482        so clear to me how that should be done in a general way.
483    o CFC: improve formatting of output in CFC_ATMOS
484    o PTRACERS:
485      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
486        that ALL experiments with ptracers enable can be checked. This makes
487        GCHEM_MONITOR obsolete.
488      - include a runtime parameter PTRACERS_monitorFreq that defaults to
489        monitorFreq
490      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
491    o add PTRACERS (PTR0[1-5]) to testreport output
492    o exf_check_range:
493      * default changed to .TRUE.
494      * will check values for niter0 if debLevA, every timestep if debLevB
495      * STOP in exf_check_range if 'out of range'
496      * range chosen generous to allow for potential extema
497      TBD: a version with stricter range
498           permitted range would be runtime parameters
499    o GMredi:
500      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
501      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
502      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
503    o GCHEM:
504      - move call to GCHEM_FORCING_SEP, so that it is now called before
505        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
506      - introduced a useGCHEM runtime flag and applied it everywhere.
507      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
508        this flag is now only visible within GCHEM-pkg routines.
509      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
510        be replaced by a 3D array that is computed before thermodynamics; for
511        this, the tracer ID iTracer had to be included into the parameter list
512        of ptracers_forcing
513      - set up forward_step to call gchem_forcing, that will replace
514        gchem_forcing_int in ptracers_forcing
515      - cleaning up
516    o small cleaning of exch2: remove files that are also in eesupp/src
517    
518    checkpoint56
519    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
520    o mnc: cleanup "full" files--fixes out-of-memory problem
521    o ECCO-GODAE
522      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
523      * fully merged and updated from SIO code
524        windstress sign change affects
525        - exf_inscal_[u/v]stress
526        - sign of xx_tau[u/v] adjustments
527        - signs in cost_scat
528      * ctrl_get_gen: avoid update of tau[u/v] for first few days
529      * natl_box_adjoint updated and compressed
530      * 2-level checkpoint switch added
531        (tested in EXP. 1 of natl_box_adjoint)
532      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
533    o SVD
534      * first complete, non-hacked version for SVD calculations
535      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
536        performed via direct access files admtlm_vector.it????
537        (via ctrl_[un]pack)
538      * optimcycle is used for ARPACK iteration counter
539        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
540      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
541        and add linear transforms where necessary
542      * controls are initial/final SST, SSS (can be extended; need to check
543        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
544    o mdsio: filename info to both stderr, stdout
545    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
546      from sign change
547    
548    checkpoint55j_post
549    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
550      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
551    o add consistent build directories and .cvsignore files to verification
552    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
553    o make all subroutines 30 or less characters in length for certain older
554      compilers to work (a thorough search only turns up two routines in
555      pkg/ptracers)
556    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
557      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
558    
559    checkpoint55i_post
560    o change arrays for total vertical diffusivity (2.D if explicit,
561      3.D if implicit) ; each ptracer uses its own background value.
562    o added mnc/NetCDF output capability to ocn_compon_interf
563      - added bits to verification/cpl_aim+ocn so that it can run on
564        ITRDA and other clusters without the mpirun "-wd" option
565    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
566      configuration
567    o give MNC the ability to create additional files rather than
568      exceeding a specified file size limit "MNC_MAX_FILESIZE"
569      - the default is just less than 2GB which is a practical limit
570        on many systems
571    o Compute the non-local term using either KPP vertical diffusivity (=default)
572       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
573    
574    checkpoint55h_post
575    o add verification test "vermix"
576    o remove all the *_ioinc flags and replace with the single global
577      outputTypesInclusive flag
578    o allow to set a vertical profile of vertical diffusivity for T & S
579    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
580    o useMNC moved from data.mnc to data.pkg
581    
582    checkpoint55g_post
583    o Renaming carbon AD experiments to comply with testreport conventions
584    o Updating adjoint of Held-Suarez hs94.1x64x5
585    o Fixing directives for non-ECCO forward_step, after ECCO directives
586      have been fixed to avoid recomp. of do_oceanic_phys
587      Works well for global_ocean.90x40x15,
588      but recomp. issue remains for carbon
589    o Updating adjoint output for natl_box_adjoint after
590      pkg/ecco has been modified (see taga c55d_post)
591    
592    checkpoint55f_post
593    o rename to timeave_init_fixed
594    
595    checkpoint55e_post
596    o some delicate re-shuffle of store directives to avoid one
597      extra call of do_oceanic_physics
598      affects ecco_the_main_loop.F, do_oceanic_physics.F
599      checkpoint_lev1_directives.h
600    o NB: this may break global_ocean adjoint temporarily,
601      but it is clear how to fix it. Will do later, need this now.
602    
603    checkpoint55d_post
604    o ECCO specific cost function terms (up-to-date with 1x1 runs)
605    o ecco_cost_weights is modified to 1x1 runs
606    o modifs to allow observations to be read in as
607      single file or yearly files
608    o enable to read exf forcing fields as either
609      single file or yearly files (flag useExfYearlyFields)
610    checkpoint55d_pre
611    
612    o switch between 2-level and 3-level checkpointing
613    o add ability of MNC to write local and "partial" (eg. 2D slices where
614      the full 3D field is never actually stored) arrays to NetCDF files
615      with the correct (that is, the complete multi-dimensional) set of
616      array indicies
617      - used in mom_vecinv() to write the diagFreq output
618      - tested (demonstrated) in verification/aim.5l_cs
619    o further mnc-ification
620      - add verification/lab_sea to the list with mnc setups
621      - fix undefined mnc v-names in cd_code
622      - add kpp to mnc output (both snapshot and timeave)
623    o non-hydrostatic code
624      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
625        in calc_gw.F
626      - defaults to viscAh
627      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
628        friction or Leith) in non-hydrostatic mode, as long as there is
629        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
630    o pkg/cost
631      extend simple cost functions to treat time mean quantities
632      (T,U,V) via cost_accumulate_state from cost_tile
633    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
634        be 2 times larger than the minimum size the advection scheme requires.
635        now get a perfect conservation of salt in advect_cs test-exp (updated)
636    o GGL90 (Gaspar's TKE mixed layer)
637      - add horizontal diffusion of TKE, requires exchanges in
638        do_fields_blocking_exchanges, horizontal diffusivity is zero by
639        default. In OPA there is no horizontal diffusion of TKE but the
640        mixing coefficients are computed from a horizontal average of TKE of
641        6 points or so. I think that diffusion has a little more physical
642        justification.
643      - clean up ggl90_calc in the hope of reducing memory usage (this hope
644        was in vain)
645      - mask tke-variable in ggl90_init
646    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
647    o fix biharmonic diffusion on CS-grid.
648    o more obcs stuff
649      - added obcs_external_fields_load as an alternative to the EXF-pkg option
650        for reading boundary values. This routine is called from
651        obcs_prescribe_read
652      - updated obcs_check
653      - changed sponge layer relaxation parameter units for days to seconds
654      - turned off sponge layer by default
655      - changed argument list of OBCS_CALC to myTime+deltaTclock
656      - fixed about 35 bugs in obcs_external_fields_load
657    
658    checkpoint55c_post
659    o obcs stuff
660      - new runtime flags useOBCSprescribe, useOBCSbalance
661      - re-arranged obcs_calc
662      - moved exf_getobcs to obcs_prescibe_read
663        obcs_prescibe_read is called after ORLANSKI stuff
664        and independent of it (executable can contain all).
665      - updated obcs_check
666      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
667        These may be necessary only if tangential velocities are
668        prescribed at OB, not sure, needs testing.
669    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
670      which simplifies the calls and passes the ifc check-bounds test
671    
672    checkpoint55b_post
673    o add a 2D scalar, Z location, exchange_2 routine.
674    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
675      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
676      affects advect_cs results (for the wrong reason): update output.txt
677    o use a more standard discretization for biharmonic viscosity ;
678     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
679      affects results of dome set-up: update output.txt
680    o fix gad_advection.F (CubedSphere part), back to version 1.23
681    o fix bug in mom_vi_del2uv.F (CubedSphere part).
682    
683    checkpoint55a_post
684    o merged code to
685      * prescribe/read time-dependent open boundaries
686        (works in conjunction with exf, cal)
687      * sponge layer code for open boundaries
688      * each boundary N/S/E/W now has its own CPP option
689        (healthy for the adjoint)
690    
691    checkpoint55
692    o up-to-date adjoint of previous breaks
693      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
694      - global_ocean_ebm: adjoint still needs fix (TLM ok)
695      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
696      - carbon: * remove tr1-related adjoint verification
697                * add ptracer as control variable
698    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
699      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
700    
701    checkpoint54f_post
702    o in verification/carbin/ remove experiment related to
703      ALLOW_PASSIVE_TRACER (array tr1 etc)
704      code_ad/ input_ad/ results_ad
705    
706    o add two new packages
707      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
708        + subject to optimization (memory)
709      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
710        + subject to reordering (many GOTOs in the original code)
711        + so far opps is called for every (i,j) point, and then operates in
712          the vertical; one may want to reorder the scheme in order operate in
713          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
714          fields)
715    o overhaul of IO so that we now have flags for MDSIO and/or MNC
716      - all verification tests compile and run with linux_ia32_g77
717      - defaults are compatible with current input files--nothing
718        should change if you were not previously using MNC
719      - MNC output has been added in numerous places (eg. timeave)
720        but there are still a few writes not yet do-able with MNC
721        (this is in progress)
722      - flags now allow for either/or/both use of MDSIO and MNC and
723        documentation will soon follow
724      - numerous small formatting cleanups for ProTeX
725    o add version info (via BUILD_INFO.h) to MNC and stdout
726    
727    checkpoint54e_post
728    o add two new packages
729      - pp81 (Packanowski and Philander, 1981), Richardson number and
730        stratification dependent mixing
731      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
732      - these scheme operate in a similar manner as KPP (without ghat, of
733        course), however there is only one diffusivity that is used for both
734        temperature and salinity (and passive tracers)ç
735    o add offline package
736    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
737      provided by Stephanie Dutkiewicz
738    o genmake2: add ability to search for C compilers and cleanup test output
739      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
740    
741    checkpoint54d_post
742    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
743    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
744      leading to additional shift by 5 days each year of integration
745       (i.e. leading to considerable offset over the years)
746    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
747    o start with no AB and no initial filtering (staggerTimeStep):
748      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
749    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
750      (external loading & cpl import/export stay in forward_step.F)
751    o update coupling interface to work with new staggerTimeStep
752    o change MDSIO ptracers_pickup.
753    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
754    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
755    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
756    
757    checkpoint54c_post
758    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
759      this affects (truncation error) output.txt of test-exp:
760       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
761    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
762    o change Qnet to always be the net heat flux, (+upward).
763      affects (truncation error) output of natl_box exp.: updated
764    o define the max number of passive tracers in PTRACERS_SIZE.h
765    o start to test mnc routinely in exp0
766    o add sea-ice loading (sIceLoad) as a new forcing field.
767    
768    checkpoint54b_post
769    o add testreport "-j JOBS" option for parallel builds (tested and pretty
770       impressive on Altix and Opteron systems)
771    o diagnostics can now write NetCDF files through the mnc package
772    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
773    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
774    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
775      affects (truncation error) output of lab_sea & natl_box exp.: updated
776    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
777    
778    checkpoint54a_post
779    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
780    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
781    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
782    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
783      + internal_wave (shift in writing cg2d_ini_res)
784    checkpoint54a_pre
785    
786    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
787      - modified verification/lab_sea and natl_box_adjoint accordingly
788    
789    checkpoint54
790    checkpoint53g_post
791    o prepare splitting of thermodynamics: store convect.counter in common block
792    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
793      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
794    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
795    o new parameter "nShapS": allow to treat differently S from T (nShapT)
796    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
797    o restore adjointability
798    
799    checkpoint53f_post
800    o modifications that affect AIM experiment results (update output.txt):
801      - no advection of S at top interface Nr (pkg/generic_advdiff)
802      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
803    o AIM pkg:
804      - include stability function into surf.Flux derivative relative to Tsurf
805      - calculate clear-sky radiation & surface temp. change (for diagnostics)
806    
807    checkpoint53e_post
808    o merged cylindrical coord configuration
809    o added rotating_tank experiment
810    checkpoint53e_pre
811    
812    checkpoint53d_post
813    o faulks upgraded: re-generate output.txt that have changed:
814       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
815    o Added Bryan and Lewis, 1979, vertical diffusivity profile
816    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
817    o added Sadourny discretization of Coriolis
818      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
819      - re-enabled use of omega3 (useAbsVorticity)
820    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
821      vector-invariant equations
822      - note: does *NOT* yet use same variable visc. for no-slip BC's.
823    o recoded the lateral boundary conditions for non-hydrostatic w, this time
824      hopefully without new bugs
825      - still to do: biharmonic friction for non-hydrostatic w
826    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
827    o regenerated output for global_ocean_ebm (using -ieee)
828    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
829      of mom_common/
830      - simple re-arrangement of instructions within computing loop
831    checkpoint53d_pre
832    
833    checkpoint53c_post
834    o new version of coupler for AIM+thSIce and Ocean models
835     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
836     - land: change Evaporation of snow
837     - aim with thSIce: fix bug in snow-precip.
838    o changes to calc_gw.F
839     - bug fix for w^2 term near the bottom boundary
840     - (hopefully) improve the lateral slip boundary condtions for use with
841        partial/looped cells
842      - because the bug fix changes two verification experiments anyway (exp5
843        and plume on slope), change the lateral boundary condition from half slip
844        to the value of no_slip_sides
845    o ebm package wasnt quite up to the parallel task. Fixed that.
846    o Adjoint of EBM package + verification
847      * TLM OK
848      * ADM not sufficient accuracy yet (needs further testing)
849    
850    checkpoint53b_post
851    o Commiting new energy balance model to repository
852      * package is pkg/ebm
853      * verif. is verification/global_ocean_ebm
854      * references are in ebm_driver.F
855    C      * X. Wang, P. Stone and J. Marotzke, 1999:
856    C        Global thermohaline circulation. Part I:
857    C        Sensitivity to atmospheric moisture transport.
858    C        J. Climate 12(1), 71-82
859    C      * X. Wang, P. Stone and J. Marotzke, 1999:
860    C        Global thermohaline circulation. Part II:
861    C        Sensitivity with interactive transport.
862    C        J. Climate 12(1), 83-91
863    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
864    C        Destabilization of the thermohaline circulation
865    C        by atmospheric eddy transports.
866    C        J. Climate 7(12), 1870-1882
867    o Will need long integration testing.
868    checkpoint53b_pre
869    
870    o created pkg/mom_common in preparation for variable viscosity code
871    o renamed and split ini_mnc_io
872    o pkg/land: only liquid water can diffuse or run-off
873    o AIM using land: soil wetness availability account for snow
874    o added printMapIncludesZeros to EEPARMS namelist
875    
876    checkpoint53a_post
877    o restore TAMC compatiility for exf_constants.h
878      (no usage of _d in .h)
879    o Additional storing in KPP in an attempt to fix
880      TAMC problem with adjoint of KPP code.
881      (no success...)
882      Identical code works fine with TAF.
883    o Fixed verification/natl_box_adjoint experiments.
884      Initial conditions for Experiments 4 and 5 are now
885      set to "SEAICE_initialHEFF=0", which is more reasonable,
886      and hence gives results closer to that of Experiment 2.
887      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
888    
889    checkpoint53
890    o stable checkpoint with up to date adjoint
891      TLM tests only run for 1st grdchk at the moment. Its unclear if
892      this is a code problem or a problem with resetting code for g_
893      variables that is being autogenerated wrong.
894      Otherwise:
895       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
896       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
897         are both still in chaos following their security messes.
898    
899    checkpoint52n_post
900    o various build (mostly genmake2) changes including:
901      - ability to build/run more easily within Cygwin and MacOS X
902      - more complicated Makefiles with a stronger dependence on Gnu Make
903    o pkg/seaice modifications
904      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
905        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
906        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
907      - changed proxy for geostrophic velocity and updated
908        verification/lab_sea/results/* accordingly
909      - removed ADI dynamic solver from pkg/seaice
910      - replaced all occurrences of 1/CSTICE or 1/CSUICE
911        they caused a segmentation fault under certain circumstances
912      - removed unused field WATR
913    o bug fix in exf-package:
914      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
915         now reflect that.
916    o small fixes in the cal-package:
917      - set reference date to first of January for the 'model'-calendar
918      - failing of cal_CheckDate in cal_FullDate now actually results in a
919        warning
920    o small modifications in exf-package to increase flexibility:
921      - change climtempfreeze from a constant to a runtime parameter that
922        is specified in data.exf_clim (default = -1.9)
923      - introduce runtime parameter windstressmax (default = 2.0) that is
924        specified in data.exf
925    o fix in pkg/thsice:
926      - update Evap (Tsf changes) to be consistent with Latent heat flux
927      - maintain snow precipitation unchanged (even if Tsf >=0).
928     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
929    
930    checkpoint52m_post
931    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
932      this does not change any of the results, because myIter=0 in swfrac always
933      lead to jwtype=2 (the default anyway), but the call makes little sense
934      as a default
935    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
936    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
937      atmospheric model (AIM) to use it ; add a "slab ocean" component.
938    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
939    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
940    o extending useSingleCpuIO option to work with new exch2 I/O format
941      - old-style, missing-tile I/O is still accessible by defining CPP
942        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
943    o monitor package can write to NetCDF files and/or STDOUT
944    o fix re-definition bug in MNC_GRID_INIT_ALL()
945    o doc/api_reference added
946      - a framework for building an API Reference Manual using all
947        the "protex" comments embedded in the code
948      - see pkg/generic_advdiff, pkg/mnc for examples
949    o MNC:
950      - make myThid the last argument for all subroutines
951      - new default for the grid files: NO halos
952      - add useMNC and other run-time flags
953      - separate per-file-group handling of the unlimited dimension
954      - early initialization of MNC w/ flags read at the eeboot stage
955        and lookup tables set in initialize_fixed
956      - write all MNC output to a freshly-created directory
957    o thermodynamics sea-ice (thsice) is now tested with testreport.
958    o test exp. advect_cs: use the standard cs32 grid ; update output.
959    o Added functionality to grdchk:
960      pick global i,j,k position (or nearest wet) where to perform check.
961    
962    checkpoint52l_post
963    o new land formulation:
964      a) use ground enthalpy as prognostic variable to ensure exact
965         energy conservation.
966      b) account for water temperature and for latent heat of freezing
967         in all processes (rain, run-off, ground storage)
968      c) compute surface and ground temperature implicitly.
969    o aim_v23 modification for new land model:
970      a) Treat separately land / ocean / sea-ice surface fluxes
971         to allow implicit computation of land & sea-ice surface temp.
972      b) add snow precipitation.
973    checkpoint52l_pre
974    
975    o fix problem (when 1 tile is empty) in min/max monitor.
976    o fix bug in timeAve (u,vZetatave in common block)
977    o no restoring terms under ice for pkg/seaice
978    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
979    o bug fix for pkg/seaice pickups
980    o change MNC call locations and add coordinate attributes
981    o mask vorticity at the corner ; affects global_ocean.cs output
982    o fix ini_curvilinear_grid ; test CS experiments with mpi
983    o aim.5l_cs: modify sea-ice fraction input file ; update output
984    o exf: Adding simple range check routine for exf fields after read
985    
986    checkpoint52k_post
987    o removed top-level directory "diags"
988      - we migrated these functions to pkg/timeave a long time ago
989    o fixed bug introduced in pkg/monitor
990    o accuracy ctrlprec = 32 insuffient for gradient checks using
991      averaged fields (I/O via cost_averages)
992      -> use ctrl.h in active_file*.F to control I/O precision.
993    o paramter list of CALL ADTHE_MAIN_LOOP
994    o added initial do_the_model_io to ecco
995    o set all ...Freq to zero after cost_final
996      taveFreq, dumpFreq, pChkptFreq
997    o MAIN and ECCO differentiability restored
998    
999    checkpoint52j_post
1000    o fix nchklev in tamc.h for global_ocean...
1001    o Bringing flow and store directives up-to-date
1002    o Really weird thing!
1003      call do_the_model_io from the_main_loop with parameters
1004      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1005      TAF places a faulty re-call of initialise_varia
1006      after cost_final call which should not be there!
1007    checkpoint52j_pre
1008    
1009    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1010      error messages
1011    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1012    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1013      debug output
1014    o modfied mdsio_writefield.F to handle non-global files under exch2
1015    o update AIM Cubed-Sphere exp (aim.5l_cs):
1016      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1017    o update AIM Equatorial Channel exp:
1018      use standard aim_v23 pkg and change the SST fields to be more realistic.
1019    o globalFile now works with exch2
1020    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1021      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1022    o limit timeave output for hi-res integrations
1023    
1024    checkpoint52i_post
1025    o removed CPP_EEOPTIONS.h from verification/*/code
1026    o updated the tiling for global_ocean_pressure
1027    checkpoint52i_pre
1028    
1029    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1030      the old pkg/aim).
1031    
1032    checkpoint52h_pre
1033    o shortened offending lines in exch2_send_rx?.template
1034    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1035    o genmake2: add build & execute test for NetCDF code
1036    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1037      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1038    o added useSingleCPUIO flag to monitor.F and mon_out.F
1039    o added temporary hack for sea-ice dynamics on the cube:
1040      metric terms are ignored and it is assumed that
1041      there is no sea-ice on cube faces 1, 2, 4, and 5.
1042    
1043    checkpoint52f_post
1044    o added exch2 cube routines to pkg/exch2
1045    o modified hs94.cs-32x32x5 to use it
1046    o added new grid files to hs94.cs-32x32x5
1047    checkpoint52f_pre
1048    
1049    checkpoint52e_post
1050    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1051      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1052    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1053      to work with implicit vertical advection and AB ;
1054    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1055    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1056     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1057    checkpoint52e_pre
1058    
1059    o fix bug in impldiff when Nr=1 or Nr=2.
1060    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1061    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1062    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1063      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1064    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1065    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1066    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1067    
1068    checkpoint52d_post
1069    o re-tiled many expts to allow comparison in multi-processor mode
1070      - updated output accordingly
1071      - changed hs94.128x64x5 to use intial T from file rather than use the
1072        random number generator
1073    o add infrastructure in model routines for fizhi and gridalt packages
1074    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1075    o changes to permit hi-res, cubed-sphere, configuration
1076      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1077      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1078      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1079        of surface winds for the cube
1080      (A verification experiment, based on global_ocean.cs32x15, but with
1081       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1082       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1083       complete with example surface forcing files and matlab scripts to look
1084       at the output and compare it with that of global_ocean.cs32x15.)
1085    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1086       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1087       to conform to the common rule.
1088    o check-in the first version of the coupler + interfaces for multi-components
1089       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1090       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1091       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1092       - ocean and atmos. share the same horizontal grid (no interpolation).
1093       - exchanges between component and coupler is done in forward_step
1094    o new verification experiment, cpl_aim+ocn:
1095       coupled ocean - AIM atmosphere on cs32 grid.
1096    
1097    checkpoint52d_pre
1098    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1099    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1100    
1101    checkpoint52c_post
1102    o Fixing OPTIONS files for use of exf:
1103      - ALLOW_ECCO not needed
1104      - ECCO_CPPOPTIONS.h should not be included from
1105        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1106        as has been the case in the past
1107      - All cal/exf related options are currently set in
1108        single header file. Should remain so until we
1109        agree on a consistent new policy.
1110    o Removed all CPP options for cal package.
1111      cal has no more CPP options.
1112    o modified STOREs in GAD_ADVECTION
1113    o corrected key comp. for passkey
1114    
1115    checkpoint52b_post
1116    o new version: "thsice" of thermodynamic sea-ice pkg:
1117     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1118     - modify fluxes but do not change theta directly;
1119     - light cleaning of bulk_force pkg (still needed with thsice).
1120     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1121       + output_thsice.txt to test thsice & bulk_force pkgs.
1122    o put back grid & coriolis monitor output.
1123    checkpoint52b_pre
1124    
1125    o call "do_the_model_io" at the beginning (=> dump initial state)
1126    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1127    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1128      (need info on NUMBER_OF_PTRACERS)
1129    o missing PTRACERS headers in some routines
1130    o default tamc.h in pkg/autodiff supposed to crash
1131      to ensure proper customization
1132    
1133    checkpoint52a_post
1134    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1135      - moved surfaceTendencyTice from pkg/seaice to main code
1136      - subroutine FREEZE_SURFACE now limits only surface temperature
1137        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1138        => new output.txt for global_ocean.cs32x15 & global_with_exf
1139      - keep the old version of FREEZE for backward compatibility;
1140        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1141      - corresponding modifs for TAF directives
1142    o added surface flux output variables to TIMEAVE_STATVARS
1143    o time-averaged output for pkg/ptracers
1144    o fix problem with ECCO-related divided adjoint
1145      snapshot file was missing some ad-variables,
1146      but no warning issued by TAF
1147    
1148    checkpoint52a_pre
1149    o some bug fixes for #undef REAL4_IS_SLOW
1150    
1151    checkpoint52 = ecco_c52_e35
1152    o after testing adjoints of checkpoint51u_post
1153    
1154    checkpoint51u_post
1155    o this is the post-merge tag of the ecco-branch
1156      (needs another clean checkout and re-testing)
1157    o various natl_box_adjoint configs and results
1158      but no input fields
1159    o obcs adjoint not yet merged!
1160    o adding ECCO global 1x1 and 2x2 degree configs
1161    o updated/extended some store directives for seaice
1162    o pkg/ecco now containes ecco-specific part of cost function
1163    o top level routines the_main_loop, forward_step
1164      supersede those in model/src/
1165      previous input data.cost now in data.ecco
1166      (new namelist ecco_cost_nml)
1167    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1168    
1169    checkpoint51t_post
1170    o this is the pre-merge tag of the ecco-branch
1171    
1172    checkpoint51s_post
1173    o cleanup: removed various obsolete #define-s
1174    o pkg/grdchk
1175      - renamed 'ph-grd 3' to 'grad-res'
1176      - merged from ecco-branch
1177        (remaining bug fixes for obcs gradient checks)
1178      - additional high-precision output for testreport
1179        (grep for 'precision_grdchk_result')
1180    
1181    checkpoint51r_post
1182    o cleaned up or removed CPP_OPTIONS.h files
1183    o updated results for some of the tests to reflect the new
1184      optfiles (-ieee: -O0 instead of -O3)
1185    
1186    checkpoint51q_post
1187    o cd_code:
1188      - moved cd_scheme.F -> cd_code_scheme.F
1189      - separate read_checkpoint from cd_code_ini_vars.F
1190      - separated cd_code part from write_checkpoint
1191      - updated AD_SOURCE, generated .flow
1192      - added CD_CODE_VARS.h to the_main_loop
1193      - Moving cd_code specific store dir.s to pkg/cd_code
1194    o ctrl package totally restructured
1195      - pack/unpack now optional and decoupled from
1196        xx_/adxx_ I/O
1197      - ctrl_pack/unpack cleaned
1198        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1199      - confined inclusion of AD_CONFIG.h to where necessary.
1200    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1201    
1202    checkpoint51p_post
1203    o create initial cd_code package
1204      - WARNING: the initialization of fields within packages
1205        is broken because INI_FIELDS (where READ_CHECKPOINT is
1206        called) is called *before* PACKAGES_INIT_VARIABLES.
1207        This seems to be backwards since
1208        1) its important to initially zero the entire field including
1209           the "halo" region
1210        2) zeroing needs to be done *before* reading pickup info
1211           and the pickup call might or might not happen in any
1212           particular run
1213      - this needs an overhaul for R2
1214    o cleanup verification/*/code/GMREDI_OPTIONS.h
1215    o cleanup testreport
1216    
1217    checkpoint51o_post
1218    o bringing AD-related verif's up to date with genmake2
1219      - carbon/
1220      - global_ocean.90x40x15/
1221      - hs.94.1x64x5/
1222      - (front_relax/ )
1223    o (more) consistent directory structure for AD-related verif.'s
1224    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1225    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1226    o bug fix in find_alpha.F for MDJWF:
1227      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1228        change rho -> rho-rhoConst
1229      - replace call find_rho to find_rhonum
1230    o initialisation of rFlx extended to full array (required by TAF)
1231      and shifted to thermodynamics
1232    o removed PTRACERS.h in ptracers routine
1233    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1234    o Correcting initialisations for fVerU, fVerV.
1235    o helping TAF to recognize dependency on kUp for
1236      fVerU, fVerV
1237    o Replacing delZ by delR in pkg/ctrl/
1238    checkpoint51o_pre
1239    
1240    o undid all of cp51 pending some cleanups and discussion
1241    o added the [#include "AD_CONFIG.h"] statement to all files that need
1242       it for adjoint/tl #defines
1243     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1244     o removed tools/genmake since it no longer works
1245    
1246    checkpoint51n_post
1247    o modifications to make FREEZE flux visible to pkg/kpp
1248      - moved surfaceTendencyTice from pkg/seaice to main code
1249      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1250      - subroutine FREEZE now limits only surface temperature
1251        (this means new output.txt for global_ocean.90x40x15,
1252         global_ocean.cs32x15, and global_with_exf)
1253    o added surface flux output variables to TIMEAVE_STATVARS
1254    
1255    checkpoint51n_pre
1256    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1257    o added [#include "AD_CONFIG.h"] to all files that use the following
1258      defines:
1259      - ALLOW_ADJOINT_RUN
1260      - ALLOW_TANGENTLINEAR_RUN
1261      - ALLOW_ECCO_OPTIMIZATION
1262    
1263    checkpoint51m_post
1264    o incorporating changes to get TAMC/TAF working in genmake2
1265      - added new TAMC/TAF targets to the Makefile
1266      - various cleanups related to package handling
1267      - these changes should have no impact on the forward model
1268    
1269    checkpoint51l_post
1270    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1271     - faster algorithm for cal_addtime.F
1272     - higher precision arithmetic, where needed
1273     - pkg/exf *startdate variables changed from calendar date to
1274       model integration time
1275    
1276    checkpoint51l_pre
1277    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1278    o enable to apply restoring on S & T only in a latitude band.
1279    o update output (external_forcing_surf modif. change truncation errors)
1280       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1281    
1282    checkpoint51k_post
1283    o change default to: useNHMTerms=.FALSE.
1284     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1285       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1286     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1287        exp1, ideal_2D_oce
1288     - change data file of oceanic exp (leave the results unchanged for now)
1289       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1290    o set gravitySign automatically according to the vertical coordinate used
1291      (and change sign: back to "logical" value: +1 when R increases downward)
1292    o added an include barrier to the default CPP_OPTIONS.h and
1293      removed the #include "PACKAGES_CONFIG.h" from it
1294    o fix a bug in mom_fluxform (from chk51j_post)
1295    
1296    checkpoint51j_post
1297    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1298    o adjusted some flow directives (dynamics, thermodynamics)
1299    o added cubed-sphere case to test cost function
1300    o heckpoint_lev?_directives.h now include
1301      pkg-specific directives, whenever those are enabled.
1302    o Moving pkg-specific flow directives to corresponding pkg
1303      Moving pkg-specific differentiation list to corresponding pkg
1304      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1305      ---> conventions are
1306           - pkg_ad.flow
1307           - pkg_ad_diff.list
1308           - pkg_ad_check_lev?_dir.h
1309    
1310    checkpoint51i_post
1311    o merge of the branch-genmake2
1312      - knowingly breaks the older genmake
1313      - automatic generation of all ALLOW_${PKG_NAME} defines
1314      - new testreport supersedes older testscript
1315    o large number of package inclusion and header cleanups
1316    checkpoint51i_pre
1317    
1318    o new output for adjoin of global ocean vector invariant
1319    o fix for checkpoint of thermodynamic seaice and bulk_force
1320    o Steph gchem various cleanups
1321    
1322    checkpoint 51h_pre
1323    o fixed some single quotes
1324    o modify gchem pkg to be more versatile
1325    o modifications to clean up dic pkg
1326    o add pkg/cfc
1327    
1328    checkpoint51g_post
1329    o provide links for ARPACK and ADM*TLM
1330    o start removing verification/vero/
1331    o update AD-related stuff
1332      (in particular some IF-statements in model/src/ routines)
1333    o adding to verification/global_ocean.90x40x15/ adjoint of
1334      vector invariant setup
1335    
1336    checkpoint51f_post
1337    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1338    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1339      of tracer Green's fucntions for ocean inversion project.
1340    
1341    checkpoint51f_pre
1342    o Added on-the-fly spatial interpolation capability
1343        "USE_EXF_INTERPOLATION" to pkg/exf.
1344      - This is a temporary Cartesian-grid hack until
1345        the super-duper ESMF coupler becomes available.
1346      - See verification/global_with_exf/README for usage example.
1347      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1348        flags and modified pkg/seaice accordingly.
1349    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1350        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1351        non-local transport term.
1352    
1353    checkpoint51e_post
1354    o pkg/mom_vecinv:
1355      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1356      - add time-ave diagnostic of vorticity advection.
1357    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1358    o atmospheric geopotential: - include water vapor effect;
1359                                - use p^kappa in p* scaling.
1360    o land pkg: read initial state from files.
1361    o AIM : add stratospheric drag in the upper level
1362    
1363    checkpoint51d_post
1364    o change function ILNBLNK (=> last non-blank char.) to return zero
1365      (instead of the string length) when the string. char is empty
1366    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1367    o modif's to restore TAMC compatibility
1368      - avoid "_d" constructs in PARAMETER declarations
1369      - avoid interrupting lines by comment lines
1370    o Use cluster local disks for purely local I/O
1371      vs. globally visible disks needed for ctrl stuff
1372      (merged from ecco-branch)
1373      - new active_file_loc... and mdsio_..._loc routines
1374      - affected packages: autodiff, ctrl, grdchk, mdsio
1375    
1376    checkpoint51c_post
1377    o introducing integer flag debugLevel
1378      - debLevZero: suppress all output
1379      - debLevA: standard
1380      - debLevB: equivalent to current debugMode=.TRUE.
1381    o introducing pathname variable mdsioLocalDir for mdsio
1382      that can be specified at runtime
1383      (relevant for cluster I/O to local disk)
1384    `
1385    >>>checkpoint51b_post
1386    adjoint of ptracers
1387    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1388    o extended state in checkpoint_lev?, etc.
1389    o alternative ctrl/cost with tr1 or ptracer
1390    o new comlev1_bibj_ptracers
1391    o new ptracers.flow
1392    o made ptracers_forcing same as external_forcing_s
1393    o added verification for adjoint with ptracers
1394      - adm. grdchk fail so far
1395      - tlm. grdchk OK
1396      - checked tapelev/comlev recomputations: OK
1397    <<<checkpoint51b_pre
1398    
1399    checkpoint51a_post
1400    o added code for biogeochemistry package
1401      - new pkgs: dic, gchem
1402      - new subroutine in ptracers
1403    o modify code for biogeo packages
1404      - in model/src and pkg/ptracers
1405    
1406    checkpoint51
1407    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1408      - autodiff, ctrl, exf, grdchk, seaice
1409      kept separate packages
1410      - cost, ecco, obcs
1411    o updating verification/internal_wave, verification/lab_sea
1412      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1413    
1414    checkpoint50i_post
1415    o Preparing next differentiable checkpoint and sync
1416      of MAIN vs. ecco-branch
1417      - 1st step: this one is differentiable
1418      - 2nd step: next(! not this) checkpoint will have updated packages
1419                  from ecco-branch)
1420    
1421    checkpoint50h_post
1422    o new package "land": provide surface BC for AIM.
1423    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1424    o AIM: use true log-P extrapolation for near surface temp (= as in
1425        F.Molteni paper) ; update aim.5l_cs output.
1426    o New variable in PARM03 for more flexible pickups
1427    o somewhat cleaned package initialisation sequence for
1428      ctrl/ cost/ ecco/ in packages_... routines
1429    
1430    checkpoint50g_post
1431    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1432      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1433      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1434        made the default because of faster convergence than ADI
1435    
1436    checkpoint50f_post
1437    o exf totally restructured
1438      - replaced all exf_set_ routines by one generic exf_set_gen.F
1439        and made sure it's still differentiable
1440      - split exf_getffields.F into new exf_bulkformulae.F
1441      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1442      - updated adjoint/makefile and relevant verif. accordingly
1443    
1444    checkpoint50f_pre
1445     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1446          + change Evap over land. (update aim.5l_cs output)
1447     o added missing .cvsignores and made uniform across expts
1448     o changed configuration of tidal_basin_2d expt
1449     o added pkg/debug functions for tracing code in fatal crashes
1450     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1451     o new fn in pkg/monitor to stop model if solution grows too big
1452     o removed lots of single quotes from comments
1453    
1454    checkpoint50e_post
1455    o make KPP work with PTRACERS
1456     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1457       nearly a copy of kpp_transport_s
1458     - there is no analogue to SurfaceTendencyS, so I have to use
1459       gPtr(of the surface layer) instead
1460    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1461    checkpoint50e_pre
1462    
1463    checkpoint50d_post
1464    o change kpp output from multiple-record state files to single-record state
1465      files analogous to write_state.F
1466    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1467      analogous to the cg2d-related output.
1468    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1469      so that writing to internal file fn (with length 512) fails.
1470    checkpoint50d_pre
1471    
1472    checkpoint50c_post
1473    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1474    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1475    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1476    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1477    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1478    
1479    checkpoint50c_pre
1480    Merging from release1_p13:
1481    o bug fix for pkg/seaice dynamic solver
1482    o Added SEAICE_initialHEFF to pkg/seaice
1483    
1484    checkpoint50b_post
1485    o store u*,v* in gU,V instead of in guNm1,gvNm1
1486    o in order to put the momForcing out of the Adams-Bashforth:
1487      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1488      to timestep.F
1489    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1490    o re-generate output for highly sensitive test-exp:
1491       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1492    
1493    checkpoint50b_pre
1494    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1495    o corrected CPP option mismatch in exf_Bulk... functions for case
1496      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1497    
1498    checkpoint50a_post
1499    o Bug fix for merging between c50 and KPP.
1500      ikey was passed from thermodynamics to kpp_calc via
1501      common block rather than being recomputed in kpp_calc,
1502      in contradiction with new key itdkey.
1503      New key ikppkey created, and tamc.h headers updated.
1504    
1505    checkpoint50
1506    - 2nd step of merge with ecco-branch:
1507      merge changes in ecco-branch back into main trunk
1508    - bug fix in find_alpha
1509    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1510    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1511    - merged some sliced AD support routines
1512    
1513    checkpoint49
1514    merged from ecco-branch:
1515    o exf:
1516      - Enable initialisation of forcing fields to constant
1517        (runtime) values.
1518      - in exf_getffields.F
1519        Reduce i-/j-loop to interior domain, discarding overlaps.
1520        That also fixes wrong TAF-key computations for key_1, key_2
1521        with bulf formulae.
1522      - exf_init.F modify #ifdef for exf_init_evap
1523      - exf_getffieldrec.F, ctrl_getrec.F
1524        The following INT-usages are not safe:
1525          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1526          fldcount = int(fldsecs/fldperiod) + 1
1527        and were modified.
1528    o autodiff: checkpoint_lev...
1529      - updated storing for bulk formulae (some arrays were missing)
1530      - added state for seaice package
1531      - synchronized with main branch
1532    o DIVA:
1533      Modif.s in
1534      - the_main_loop.F
1535      - the_model_main.F
1536      and added cost_final_restore.F cost_final_store.F
1537      o With these changes, it is possible to fully separate
1538        the first forward run to compute the cost function (mdthe_main_loop)
1539        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1540        into separate model executions.
1541        This enables better tuning of DIVA to given queue sizes.
1542      o Loss of cost function value in consecutive DIVA runs is
1543        fixed by storing to 'costfinal' file.
1544      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1545        beginning/end of adjoint integration is accounted for.
1546      The current changes apply to TAF-1.4.26.
1547      TAF has one remaining bug, requiring one manual change
1548      (see MITgcm manual).
1549    o cal: synchronized between MAIN and ecco-branch
1550    
1551    checkpoint48i_post
1552    o Changes to restore differentiability of code w.r.t. previous tag
1553      (mostly adding new routines to make list and replacing
1554      pressure by totPhiHyd).
1555    o Updated and merged grdchk package
1556      - has both ADM and TLM checks
1557      - works for single- and multi-proc.
1558      - output cleaned
1559      - worked successfully for parallel DIVA
1560    o genmake:
1561      - Adding -platform=SP4
1562      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1563    o Modif. for DIVA:
1564      ctrl_unpack should not be called in intermediate DIVA interval.
1565      (similar thing would apply for active files such as
1566      tbar, sbar, psbar, which should not be reinitialised;
1567      only relevant for ecco-branch)
1568    
1569    checkpoint48h_post
1570    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1571    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1572    o Added SEAICE_initialHEFF to pkg/seaice
1573    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1574    
1575    checkpoint48g_post
1576    --- EOS:
1577    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1578      store total Potential in totPhyHyd for diagnostics & EOS.
1579    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1580    --- Pressure/geopotential gradient:
1581    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1582    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1583      ( changes results of global_ocean_pressure )
1584    o NLFS + z-coord.: add eta*Rho' contribution.
1585    o accurate phiHyd when using interface-W at the middle between 2 centers
1586     ( changes results of ideal_2D_oce )
1587    o includes r* 2nd term in potential gradient.
1588    
1589    checkpoint48f_post
1590    Merging from release1_p12:
1591    o Modifications for using pkg/exf with pkg/seaice
1592      - improved description of the various forcing configurations
1593      - added basic radiation bulk formulae to pkg/exf
1594      - units/sign fix for evap computation in exf_getffields.F
1595      - updated verification/global_with_exf/results/output.txt
1596    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1597      (SBO) core products, including oceanic mass, center-of-mass,
1598      angular, and bottom pressure (see pkg/sbo/README.sbo).
1599    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1600      to avoid negative values in shallow regions.
1601      - updated verification/natl_box/results/output.txt
1602      - updated verification/lab_sea/results/output.txt
1603    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1604    o Added useSingleCpuIO option (see PARAMS.h).
1605    o Updated useSingleCpuIO option in mdsio_writefield.F to
1606      work with multi-field files, e.g., for single-file pickup.
1607    o pkg/seaice:
1608      - bug fix in growth.F: QNET for no shortwave case
1609      - added HeffFile for specifying initial sea-ice thickness
1610      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1611    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1612      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1613    o pkg/seaice:
1614      - adjoint-friendly modifications
1615      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1616    
1617    checkpoint48e_post
1618    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1619    o dynamics: change definition of computational domain & adapt mom_fluxform
1620      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1621    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1622        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1623        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1624        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1625        inverted_barometer solid-body.cs-32x32x1
1626      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1627    
1628    checkpoint48d_post
1629    o in preparation for r*:
1630     a) use pre-computed gradient of hydrostatic potential:
1631        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1632     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1633        => affects results of glob_oce_pressure (different truncation error)  
1634      update output.txt of ideal_2D_oce & global_ocean_pressure
1635    
1636    checkpoint48d_pre
1637    o in preparation for r*:
1638      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1639      pass the 2 comp. of the grad. as arguments to momentum S/R.
1640      but for the moment, only used if it does not change the results.
1641    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1642    
1643    checkpoint48c_post
1644    Modifications in treatment of initial flux forcing controls
1645    to avoid extra storing of flux fields.
1646    
1647    checkpoint48c_pre
1648    o Added tidal_basin_2d experiment (currently 1D!)
1649    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1650    
1651    checkpoint48b_post
1652    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1653     (modification to pressure gradient not yet implemented)
1654    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1655      (for U & V) that are used for vertical advection of momentum.
1656    
1657    checkpoint48a_post
1658    o In preparation for r*, use temp. array to compute vertical transport
1659       in flux-form momentum pkg. => change results of few test-exp.
1660      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1661                        lab_sea, natl_box & plume_on_slope
1662    
1663    checkpoint48
1664    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1665    
1666    checkpoint47j_post
1667    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1668    o moved adexch from forward_step to addummy_in_stepping
1669    o added exch in ctrl_map_...
1670    o aveFreq.=0. at end of cost_final to avoid overwrite in
1671      reverse checkpointing loop
1672    o Yet more changes in gmredi:
1673      * adgmredi_calc_tensor
1674        avoiding all recomputation of gmredi_slope_limit
1675      * adgmredi_x/y/rtransport
1676        added flag for excessive storing to avoid recomp. of
1677        u/v/rtans, dTdx/y/z
1678        -> this is not really necessary and very memory-consuming
1679      * adgmredi_slope_psi:
1680        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1681      * gmredi_slope_limit
1682        re-activated full calculation of taperfct for case 'ac02'
1683    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1684    
1685    checkpoint47i_post
1686    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1687    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1688      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1689    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1690    o gmredi: fix few bugs.
1691    
1692    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1693    This will be a good checkpoint to plug into the ecco-branch.
1694    o few modif.'s to get latest version adjointed
1695      (mainly kick out code in ini_linear_phisurf)
1696    o modif's to run adjoint with exactConserv
1697    o case GM_BOLUS_ADVEC should be cleaned
1698      S/R gmredi_slope_psi should be cleaned
1699    o verification/carbon now has exactConserv=.TRUE.
1700    
1701    checkpoint47g_post
1702    o time-average AIM output: becomes independent from statvars time-average
1703      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1704    o After TAF bug fix:
1705      Tested adjoint of gmredi package.
1706      Tests were done with checkpoint47 rather than with latest
1707      checkpoint47f_post since the latter is broken for the adjoint
1708      verification/carbon/ contains both ADM and TLM gradient checks.
1709    Here they are, before they get changed/lost/stolen.
1710    Mostly modif.'s to fix numerical sensitivities.
1711    Gradient checks OK for
1712    - GM_taper_scheme:
1713      * clipping
1714      * ac02
1715      * linear
1716      * glw91
1717      * dm95
1718      * ldd97
1719    - GMREDI_OPTIONS:
1720      * GM_VISBECK_VARIABLE_K
1721      * GM_NON_UNITY_DIAGONAL
1722      * GM_EXTRA_DIAGONAL
1723      * GM_BOLUS_ADVEC
1724    in conjunction with data.gmredi parameters to be checked in
1725    in a few minutes under verification/carbon/code/
1726    
1727    checkpoint47f_post
1728    Merging from release1_p10:
1729    o modifications for using pkg/exf with pkg/seaice
1730      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1731        and SEAICE_EXTERNAL_FLUXES
1732      - pkg/exf CPP options EXF_READ_EVAP and
1733        EXF_NO_BULK_COMPUTATIONS
1734      - usage examples are Experiments 8 and 9 in
1735        verification/lab_sea/README
1736      - verification/lab_sea default experiment now uses
1737        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1738    
1739    checkpoint47e_post
1740    o created a tag prior to creating a branch
1741    
1742    checkpoint47d_post
1743    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1744      at the bottom boundary had an erroneous half slip boundary condition
1745    o added bottom drag and no slip boundary condition capabilities to
1746      oceanic pressure coordinates code
1747    o added new verification experiment global_ocean_pressure, this experiment is
1748      also described in the tutorial section of the manual
1749    checkpoint47d_pre
1750    
1751    checkpoint47c_post
1752    o Added a verification experiment for a global cubed-sphere ocean run
1753      -  verification/global_ocean.cubed32x32x30
1754      -  uses pkg/therm_seaice and pkg/bulk_forcing
1755    
1756    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1757    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1758      when using P-coordinate; only implemented for atmospheric config.
1759    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1760      NOTES: requires option NONLIN_FRSURF to be "#define".
1761    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1762    
1763    checkpoint47b_post
1764    Merging from release1_p9:
1765    o pkg/seaice
1766      - removed GOTO's and added taf directives
1767      - double precision constants to reduce the g77 (Linux)
1768        to F77 (SGI) differences reported in release1_p8
1769    o tools/genmake
1770      - added SGI options
1771    o verification/testscript
1772      - updated to that of checkpoint47a_post
1773    o verification/global_ocean.90x40x15/input/eedata
1774      - modified for SGI f77 compatibility
1775    o verification/lab_sea
1776      - added description of sea-ice model
1777      - added missing matlab routines
1778      - added test of thermodynamics parallelization
1779    
1780    checkpoint47a_post
1781    o new pkg: aim_v23
1782     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1783       for now, keep the same surface forcing as before.
1784     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1785     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1786     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1787    o add diagnostic of surface correction term in monitor output
1788    
1789    o bulk_force and therm_seaice
1790    - Two packages:  bulk_force (Bulk forcing)
1791      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1792    - Earlier integration from Stephaine Dutkiewicz
1793      and Patrick Heimbach.
1794    - Two ifdef statements for compile time,
1795       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1796    
1797    checkpoint47
1798    differentiable version of checkpoint46n_post
1799    o bug fix in quasihydrostaticterms
1800    o * "clean" adjoint code (in terms of extensive recomputations)
1801        can now be obtained for all GMREDI options (i.e. for
1802        - GM_VISBECK_VARIABLE_K
1803        - GM_NON_UNITY_DIAGONAL
1804        - GM_EXTRA_DIAGONAL
1805        - GM_BOLUS_ADVEC )
1806      * However, wrong gradient check problem remains unsolved.
1807      * New CPP options have been introduced for different
1808        tapering schemes
1809    o external_fields_load now part of differentiation list
1810    o pressure needs multiple storing;
1811      would be nice to have store_pressure at beginning or
1812      end of forward_step, e.g. by having phiHyd global (5-dim.)
1813      (NB: pressure is needed for certain cases in find_rho,
1814      which is also invoked through convective_adjustment).
1815    o recomputations in find_rho for cases
1816     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1817    o #define ATMOSPHERIC_LOADING should be differentiable
1818    o ini_forcing shifted to begining of initialise_varia
1819    o Incorporating QNVS line search routines into MITgcm
1820      (this is separate code, and therefore not under pkg)
1821      lsopt/, optim/
1822    o Updated verification/carbon/
1823      - #define GM_VISBECK_VARIABLE_K
1824      - GM_taper_scheme    = 'ldd97'    
1825    
1826    checkpoint46n_post
1827    Merging from release1_p8:
1828    o verification/natl_box:
1829      updating new external_fields_load routine
1830    o New package: pkg/seaice
1831      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1832      The sea-ice code is based on Hibler (1979-1980).
1833      Two sea-ice dynamic solvers, ADI and LSR, are included.
1834      In addition to computing prognostic sea-ice variables and diagnosing
1835      the forcing/external data fields that drive the ocean model,
1836      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1837      The implied surface heat flux is then stored in variable
1838      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1839      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1840      non-local transport term.  Because this call precedes model
1841      thermodynamics, temperature under sea-ice may not be "exactly" at
1842      the freezing point by the time theta is dumped or time-averaged.
1843      N.B.: fairly large differences in accuracy occur across
1844            different platforms/compilers; comparison between
1845            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1846            generated output gives:
1847       T           S           U           V
1848      C D M    c        m  s        m  s        m  s        m  s
1849      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1850      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1851      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1852    
1853      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1854    o GAD:
1855      - generated new common blocks to account for call of
1856        same gad routines with differing traceridentities
1857        (needed to modify tracerIdentity indices in GAD.h)
1858      - generated separate common blocks for case useCubedSphereExchange
1859        (Department of Futurology)
1860      - parameter lists to gmredi_?transport: added tracerIdentity
1861      - added new key indices to tamc.h
1862    o external_fields_load:
1863      - added this routine to TAF list
1864      - needed to make some common blocks global and additional storing
1865        along the same lines as exf package (checkpoint_lev?_directives.h)
1866    o exf:
1867      updated external forcing package
1868      - bug fixes carried over from ecco-branch
1869        (missing OBCS_OPTIONS.h in two routines)
1870      - enable easy to use "no forcing".
1871      - added exf I/O for atmospheric loading
1872      - added exf I/O for runoff data
1873      - transfered scaling between exf <-> MITgcm to exf namelist
1874    o Adding new verification experiment global_with_exf.
1875      This verification experiment is almost identical to the
1876      global_ocean.90x40x15 experiment, except that it uses
1877      the exf (and cal) package instead of the
1878      external_fields_load routine (cf README file).
1879    
1880    checkpoint46m_post
1881    o modified testscript to return -- when there are no lines of "%MON" output
1882    o added new flag "quasiHydrostatic" for QH mode
1883      and new routine quasihydrostaticterms()
1884    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1885      New routine: mom_u_coriolis_nh()
1886    o fixed sign of non-hydrostatic metric terms in u and v equations.
1887      Depend on correct sign of gravitySign.
1888    o added work.pc* to .cvsignore in aim directories using ifc
1889    o introduced flag for controllin non-hydrostatic metric terms
1890    o removed gravitySign from PARM04
1891    o switched to g77/ifc from pgf77 in aim experiments
1892    
1893    checkpoint46l_post
1894    o made convective adjustment work with pressure coordinates:
1895     - changed the direction of k-loop in convective_adjustment.F for the
1896       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1897     - adjusted the reference pressure k-index in convective_adjustment.F
1898     - adjusted the convection condition in convect.F (in analogy to
1899       calc_ivdc.F)
1900     - convective_adjustment no longer computes anything on the halos
1901     - removed the warnings about negative salinity from find_rho.F and
1902       find_alpha.F; instead the new routine look_for_neg_salinity, called
1903       at the beginning of find_rho, find_alpha, and find_beta, does a
1904       check of the entire slice, if CPP-option
1905       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1906    checkpoint46l_pre
1907    
1908    checkpoint46k_post
1909    o fixed the verification/global_ocean.90x40x15 experiment:
1910     - new bathymetry (the world according to A., JMC, and M.)
1911     - new initial fields and forcing fields (*.bin files)
1912     - new POLY3.COEFFS (for the next release one should switch to a full
1913       equation of state: JMD95P or MDJWF)
1914     - fixed several errors and redundancies in the data file
1915     - experiment uses looped cells
1916     - added matlab directory with diagnostic scripts for plotting of output
1917    
1918    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1919     - read AIM physics parameters from a file (data.aimphys)
1920     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1921    
1922    checkpoint46j_post
1923    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1924    o move wVel computation at the end of the time step, in S/R integr_continuity
1925    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1926    o update timeave pkg for wVel diagnostic.
1927    checkpoint46j_pre
1928    
1929    checkpoint46i_post
1930    o Clean up AIM package (and keep the results unchanged):
1931      include CPP_OPTION and use IMPLICT NONE in all routines ;
1932      declare all the variables _RL ; use _d 0 for all numerical constants.
1933      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1934    
1935    checkpoint46h_post
1936    o cleaned up the use of rhoNil and rhoConst.
1937      - rhoNil should only appear in the LINEAR equation of state, everywhere
1938        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1939        and the dynamical equations are all divided by rhoConst
1940    o introduced new parameter rhoConstFresh, a reference density of fresh
1941      water, to remove the fresh water flux's dependence on rhoNil. The default
1942      value is 999.8 kg/m^3
1943    o cleanup up external_forcing.F and external_forcing_surf.F
1944      - can now be used by both OCEANIC and OCEANICP
1945    checkpoint46h_pre
1946    
1947     Added code to convert surface volume flux (fresh water) into
1948     a mass flux when using P coordinates in the ocean (OCEANICP).
1949     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1950    
1951    checkpoint46g_post
1952    o Include a new diagnostic variable phiHydLow for the ocean model
1953      - in z-coordinates, it is the bottom pressure anomaly
1954      - in p-coordinates, it is the sea surface elevation
1955      - in both cases, these variable have global drift, reflecting the mass
1956        drift in z-coordinates and the volume drift in p-coordinates
1957      - included time averaging for phiHydLow, be aware of the drift!
1958    o depth-dependent computation of Bo_surf for pressure coordinates
1959      in the ocean (buoyancyRelation='OCEANICP')
1960      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1961        Theta, Salinity, and Pressure in the parameter list. This routine is
1962        presently contained in find_rho.F. This routine does not give the
1963        correct density for 'POLY3', which would be a z-dependent reference
1964        density.
1965    o cleaned up find_rho
1966      - removed obsolete 'eqn' from the parameter list.
1967    o added two new verification experiments: gop and goz
1968      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1969    checkpoint46g_pre
1970    
1971    checkpoint46f_post
1972    o Enable tangent linear (forward mode) gradient checks:
1973      - extended active file handling to g_... files
1974      - added TANGENT_SIMULATION to theSimulationMode
1975      - extended grdchk package accordingly
1976    o added tangent linear setup in verification/carbon/code_ftl
1977    o added adjoint setup in verification/front_relax/code_ad
1978    
1979    checkpoint46e_post
1980    o Added new equation of state -> MDJWF
1981      - EOS of McDougall et al., 2002, JAOT, submitted
1982      - caveat: the equation of state is only valid for a smaller (more
1983        realistic?) range of values than JMD95P/Z and UNESCO
1984      - added masks to the calculation of pressure in store_pressure
1985      - added more check values for density in check_eos (ini_eos.F), some of
1986        the old check values are out of the range of the MDJWF-eos, so don't
1987        expect perfect matches for those
1988    checkpoint46e_pre
1989    
1990    checkpoint46d_post
1991    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1992      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1993      case of pressure coordinates. eosType='JMD95Z' in
1994      combination with buoyancyRelation='OCEANICP' now causes an error.
1995    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1996      in find_alpha/beta.
1997    checkpoint46d_pre
1998    
1999    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
2000      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
2001    
2002    checkpoint46c_post
2003    o Changes necessary for ocean in p-coordinates
2004     -  Added new buoyancy relation = 'OCEANICP'
2005     -  Added new parameters = gravitySign (this used to be contained inside
2006        the factor dRdZ which I added when we first switched to R coordinates).
2007     X GM/Redi is not compatible (yet)
2008     X bottom drag and no-slip need to be debugged.
2009    checkpoint46c_pre
2010    
2011    checkpoint46b_post
2012    o Added new equation of state -> JMD95Z and JMD95P
2013      - EOS of Jackett and McDougall, 1995, JAOT
2014      - moved all EOS parameters into EOS.h
2015      - new routines ini_eos.F, store_pressure.F
2016    o Added UNESCO EOS, but not recommended because it requires
2017      in-situ temperature (see JMD95)
2018    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2019      unesco.f to be used with POLY3
2020    checkpoint46b_pre
2021    
2022    checkpoint46a_post
2023    o Added (atmospheric) pressure loading
2024      - new field in FFIELDS.h, etc...
2025      - new cpp flag ATMOSPHERIC_LOADING
2026    o Changed hFacC to _hFacC in calc_phi_hyd.F
2027    o Added SHORTWAVE_HEATING to some files for consistency
2028    checkpoint46a_pre
2029    
2030    checkpoint46
2031    further merges from release1_p5
2032    o new ctrl package
2033      - adopted from ECCO environment to enable optimization
2034      - added Eliassen Palm fluxes to controls
2035    o added Eliassen Palm flux controls to gradient check package
2036    o cost package
2037      - Compatible with new ctrl package
2038      - added Eliassen Palm cost hooks
2039      - modif's of existing cost functions
2040    o Adjoint-related bug fixes in kpp:
2041      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2042      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2043    o autodiff package
2044      - flow directives:
2045        + new for S/R do_the_model_io
2046        + enhanced for S/R checkpoint
2047        + new gmredi.flow
2048      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2049        disable adcommon.h/g_common.h by default.
2050      - fixed problem for adjoint of global_max
2051    o modified verification/carbon/
2052    o New setup for adjoint of global_ocean
2053    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2054    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2055    o incorporated hooks for sponge layer code (external_forcing.F)
2056    
2057    checkpoint45d_post
2058    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2059    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2060      (affects plume_on_slope "cg2d" output)
2061    o add new parameter deltaTfreesurf for free-surface time stepping
2062    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2063    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2064    o change phiMin in exp1 (to agree with documentation)
2065    o add new flags:
2066     - T,S forcing inside/outside Adams-Bashforth
2067     - turn off temp,salt advection and/or forcing
2068     - for each tracer, define internal flag for multiDimAdvection & A-B
2069    o monitor: change definition of KE to check conservation of Energy
2070    
2071    checkpoint45c_post
2072    o Removed f90 comments ("!")
2073    o Modified initialisations to enable exf package for MITgcm
2074      (without invoking ECCO_PACKAGE).
2075    o modifications to gradient check package (Martin Losch)
2076      - enable centered differences
2077      - modified format of standard output
2078    
2079    checkpoint45b_post
2080    o cleaned exchange calls in cg2d
2081    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2082    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2083      to configure barotropic setup (Martin Losch)
2084    o moved some initialisations within bi,bj loop in dynamics
2085      (TAF flow dependency)
2086    o in initialise_varia, moved call packages_init_variables
2087      before convective_adjustment_init
2088      (corresponding adjustment of TAF tape initialisation).
2089    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2090    
2091    checkpoint45a_post
2092    o compute Rho over the whole domain (extend iMin,jMin indices)
2093    o specific exchange for X-slice domain (case Ny=1)
2094    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2095    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2096    
2097    checkpoint44h_post = checkpoint45
2098    o Fix to restore differentiability:
2099      place at which packages_init_variables is called in
2100      initialise_varia is crucial for reverse control flow.
2101    o modifications in GMRedi to enable stable adjoint
2102      (corresponding modif's in thermodynamics, dynamics)
2103    o added missing hook for sponge layer code in external_forcing
2104    o modified test cost functions
2105    o storing in gad_advection (plus removal of write(0,*)!
2106    o missing headers TR1.h added in convective_adjustment routines
2107    o errorMessageUnit set non-equal zero in eeboot
2108      (conflict on some platforms, e.g. IBM SP3)
2109    o modified carbon verif.
2110    
2111    checkpoint44h_pre
2112    o vertical grid option: allow to put the Interface at the middle between
2113      2 cell-centers ; replace delZ in pkg/kpp by drF.
2114    o GM Advective form: Tracers are advected using the residual transport (=
2115      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2116    
2117    checkpoint44g_post
2118    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2119      results) ; ifdef missing in thermodynamics.F
2120    
2121    checkpoint44f_pre,checkpoint44f_post
2122    o added PTRACERS package
2123      This allows an arbitrary number of passive tracers to be integrated
2124      forward simultaneously with the dynamicaly model.
2125      + Implemented so far:
2126        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2127        - I/O and checkpointing
2128        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2129      + Not implemented so far:
2130        - KPP
2131        - OBCS
2132      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2133        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2134        line in data.pkg.
2135      + This package is disabled by default since it increases storage.
2136    
2137    
2138    o testscript: added -cleanup option
2139    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2140                 b) enable to filter 2D fields.
2141    
2142    checkpoint44e_pre,post
2143    o re-wrote convective adjustment to use pre-calculated weights
2144      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2145      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2146      Original calls to convect() still in place.
2147    
2148    chkpt44d_pre,post
2149    o added missing EXCLUDE_MONITOR flags
2150    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2151      (incompatible typ in MIN/MAX expressions caused problems
2152      on IBM SP3)
2153    o in genmake added variable MAKEDEPEND
2154      plus resetting for case SunOS
2155    o added timer_stats.c routine for IBM SP3
2156    o removed variables in dynamics
2157    !!! I forgot to create tag chkpt44d_pre !!!
2158    !!! But chkpt44d_pre = chkpt44c_post    !!!
2159    
2160    o real fresh water flux implemented with non-linear free-surface.
2161    
2162    chkpt44c_pre,post
2163    o few fix (mask in shap_s2, EmPmR in external_field_load,
2164      USE_NATURAL_BCS in solve_for_P);
2165    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2166    
2167    checkpoint44b_pre/_post
2168    o merge of relevant stuff from the ecco-branch:
2169      - genmake: removed $S64 overwrite for case SunOS
2170      - pkg/exf: update and corrections for field swapping and obcs
2171      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2172                  harmonized between ECCO and MITgcm
2173      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2174                      updated checkpointing_lev... lists for obcs
2175      - model/src: minor changes in forward_step, plot_field
2176                   added directive for divided adjoint in the_main_loop
2177      - pkg/mdsio: added mdsio_gl_slice
2178    
2179    o check parameters & config (chkpt44a_pre,post)
2180    o OBC and NonLin_FrSurf.
2181    
2182    checkpoint44
2183    o fix bug in mom_vi_del2uv
2184    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2185    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2186    o update AIM experiments (NCEP input files)
2187    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2188    o added some stuff for AD
2189    
2190    checkpoint43
2191    o added two new advection tests
2192    o added global 4x4 degree ocean test
2193    o added test of H&S94 with free surface on cube
2194    o some final mods for gradient check, adjoint,...
2195    
2196    checkpoint42
2197      Fixed AD-related problems:
2198    o Store directives up-to-date with re-arranged Adams-Bashforth
2199      (mainly thermodynamics.F)
2200    o New store directives for multi-dim. advection schemes
2201      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2202      * new common block and key passkey
2203      (mainly gad_advection.F)
2204    o Modified store directives for split of dynamics/thermodynamics
2205      for the case ALLOW_KPP
2206    o Cleaned argument list for timestep_tracer.F
2207    
2208    checkpoint41
2209    o re-formatted/added comments in prologues of key subroutines
2210      to work with protex
2211    
2212    checkpoint40
2213    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2214    o added FLT (floats) package from Arne along with demo. experiment
2215    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2216      implementation of forward-in-time forcing terms
2217    o more mods for non-linear free-surface including new variable
2218    o modified multi-dim method to work on cube
2219    o bug fix in KPP (from DM)
2220    
2221    checkpoint40pre9
2222    o added DST advection schemes
2223    o fix MPI bug on SGI's
2224    o modifications for non-linear free-surface
2225    o fixed conditionals for fixed flow/passive tracer only mode
2226    o added tension/strain form of stress tensor
2227    o changes to commenting of arguments for TAF/TAMC
2228    o added/updated many matlab scripts
2229    o added multi-dimensional advection method for tracers
2230      
2231    checkpoint40pre8
2232    o new package rw/
2233      Added method for dumping intermediate local arrays:
2234      mdsio_writetile - same as mdsio_writefield except works from inside
2235                        bi,bj loop
2236      mdsio_writelocal - same as mdsio_writetile except works for local
2237                         arrays
2238      write_local_r? - higher-level wrapper for mdsio_writelocal
2239      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2240      Example given at end of mom_vecinv.F that dumps some local arrays.
2241    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2242      control flux-form versus vector invariant code.
2243      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2244      or genmake -DISABLE ...
2245    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2246      (additional storing is now needed for case vecinv;
2247      currently nothing implemented to switch this storing off
2248      in case fluxform is used since no CPP flag available).
2249    
2250    checkpoint40pre7
2251    o bug fix in dynamics.F
2252      calc_viscosity called before k=1,Nr loop.
2253    o added some #ifdef's ALLOW_PASSIVE_TRACER
2254    o cleaned initialisations in ctrl_map_ini
2255      related to TAF
2256    
2257    checkpoint40pre6
2258    o split dynamics into thermodynamics & dynamics
2259    o corresponding split of calc_diffusivity into
2260      calc_diffusivity, calc_viscosity
2261      (kpp_calc_diff, kpp_calc_visc).
2262    o Added diffkr, kapgm to control variables
2263    o bug fix in gmredi_slope_limit for ldd97
2264    
2265    checkpoint40pre5
2266    o proper initialization of Adams-Bashforth time stepping
2267      + uses forward step for very first step of model (iter=0)
2268    o re-generated *all* output since almost all output is modified by this
2269      change (sorry but we've been putting this one off for about 2 years)
2270      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2271        *not* regenerated since they are already out of date and I don't
2272        want to create the impression that they are suddenly working.
2273    o removed KAP stuff for DEC's
2274    o modified/added many .cvsignore files in */code and */input
2275    o added new expt "solid-body.cs-32x32x1"
2276      + this uses an alternative form of ini_curvilinear_grid.F which
2277        is not necessarily any better than the current one...
2278    
2279    checkpoint40pre4
2280    o added re-initialisations of utrans,vtrans,rtrans in
2281      calc_common_factors which are crucial for TAF.
2282    o extended iMin,jMin range for calc_common_factors,
2283      calc_diffusivity
2284    o added option ALLOW_PASSIVE_TRACER
2285    o a few minor updates and fixes
2286    
2287    checkpoint40pre3
2288    o created calc_gtr1.F for gad package
2289    o split the_main_loop and re-introduced forward_step
2290    o some recomputations of nIter0 for TAMC
2291    
2292  checkpoint40pre2  checkpoint40pre2
2293  o Updated to latest branch of AJA, JMC  o Updated to latest branch of AJA, JMC
2294  o Added gradient check package  o Added gradient check package

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