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revision 1.8 by adcroft, Wed Jul 1 22:49:29 1998 UTC revision 1.564 by mlosch, Mon Oct 10 05:59:06 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    checkpoint57u_post
8    o OBCS and PTRACERS: add open boundary support for passive tracers
9      - either use homogenous (pseudo) v.Neumann conditions or prescribe
10        OB-values from file; this is not different from the way theta and salinity
11        are treated
12      - however, Orlanski-radiation conditions are not supported, and the model
13        will stop if you use pTracers and Orlanski at the same time.
14      - beefed up the rountine obcs_external_fields_load: now only those open
15        boundary values are overwritten with values from files for which there
16        are really files, otherwise the OB-fields remain untouched. This makes
17        it possible to use different OBs at different ends of the domain (as
18        with EXF)
19    o reduce number of exch calls in shap_filt (s2).
20    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
21      truncation level) 4/5 MLAdjust test results (11&12 digits match).
22    
23    checkpoint57t_post
24    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
25    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
26      same truncation, independent of the face number: affects affects several
27      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
28    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
29      note that biharmonic viscosity + no-slip was not tested in any experiment.
30    o fix bug in non-linear free-surf side-drag ; generate new output for
31      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
32    o make mnc honor the writeBinaryPrec flag for most kinds of output
33    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
34    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
35      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
36    o add brackets in multi-terms sum to get same truncation, independent of
37      the face number (manage to get exactly same value of gU,gV at the cs-edge)
38      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
39    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
40      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
41      a maximum grid-scale Reynolds number.  Also, changes all length calculations
42      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
43      Suggested values of viscosity parameters found in mom_calc_visc.
44      Many new viscosity diagnostics available.
45    
46    checkpoint57s_post
47    o Add clearing-house for viscosity calculations, mom_calc_visc and
48      correct numerous bugs in LeithD and Smagorinsky discretizations.  
49      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
50      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
51      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
52      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
53      The Strain-Tension form is now called with useStrainTensonVisc=.true.
54      ViscAhStrain and viscAhTension are now retired.
55    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
56    o In response to JMC's bug report, genmake2 now ignores any soft-links
57      that it finds in the *current* directory when searching for files.
58      Soft-links found in any other source directories will still work as
59      they did before.
60    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
61      a C routine to unlimit the stack size
62    o mnc-ify pkg/aim snapshot vars
63    o mnc-ify pkg/land as requested by Daniel
64    o various changes to mnc including:
65      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
66      - output can now be grouped so that all files within a group
67          change the ITER portion of their names in lock-step together
68      - can now read ("global") PER-FACE (in addition to PER-TILE) files
69          and works with both EXCH1 and EXCH2 (but needs more testing)
70      - writing works for all verification test cases w/ g77 on Linux
71    
72    checkpoint57r_post
73    o make MNC variable initialization happen earlier
74    o add diagnostics for (almost) each term of the momentum Eq.
75    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
76    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
77    o remove MINIMAL_TAVE_OUTPUT option ;
78      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
79    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
80      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
81    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
82    o add time-dependent SST, SSS control
83    o cost terms in ecco/ modularized (new cost_generic.F)
84    o cost_averages routines are modularized (new cost_averagesgeneric.F)
85    o new infrastructure for seaice model vs. obs misfits in seaice/
86      * driver from the_main_loop.F is seaice_cost_driver.F
87      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
88      * gradient check in Exp. 6a of natl_box_adjoint/
89    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
90      (see README file)
91    
92    checkpoint57q_post
93    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
94    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
95      - bug was reported by Jean-Michel and Ian Fenty
96    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
97      update exp. cpl_aim+ocn output.
98    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
99      Needed for high-res. runs with large global files
100      to be able to limit tapelev size
101    o Changed some tests for adjoint:
102      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
103      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
104      * global_ocean.90x40x15/ back to default 3-level checkpointing
105    o Modifications to enable scripted COMMON to MODULE conversion
106      * verification/OpenAD/code/ has necessary scripts and description;
107      * converts, compiles and runs successfully;
108    
109    checkpoint57p_post
110    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
111    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
112      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
113    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
114    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
115      (was already the case for dissipation with mom_vecinv,
116       and also the case for grad.PhiHyd when staggered-timeStep)
117      This will allow to put dissipation out-off the AB time-stepping.
118     Unfortunately, affects truncation error. Update output of exp. that "fails"
119      (cg2d matching number) and leave the others for later: front_relax(10),
120      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
121      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
122    
123    checkpoint57o_post
124    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
125      (2) its ready to be documented during the 20050801 DocFest
126    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
127      for ideal_2D_oce and lab_sea on linux_ia32_g77
128    o set to #undef CTRL_SET_OLD_MAXCVARS_30
129      in global1x1_tot/code_seaice_adj to access indices 32, 33
130      (worth another tag)
131    
132    checkpoint57n_post
133    o adding precip control xx_precip 32
134    o adding swflux control xx_swflux 33
135    o Replacing 10 forcing penalty cost routines by 1 generic.
136    o Implementing partitioning in time-mean and variable adjustment
137      for atmos. state.
138    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
139    o in natl_box_adjoint:
140      * updated exp 1 to 10
141        (but does not have time-mean vs. variable split results yet)
142    o updated global1x1/*_seaice_adj/
143      to incorporate latest changes
144    o enable useSingleCpuIO for mdsio vector routines
145      (applies in particular to tapelev I/O)
146    o removed inefficient K-loop in all active_file*control*.F
147    
148    checkpoint57m_post
149    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
150      and advect_cs (use EXCH-2 and standard cs-32 grid files).
151    o pkg/exch2: filling of face-corner halo regions is optional
152      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
153    
154    checkpoint57l_post
155     tag before updating tutorials (pre-release-2)
156    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
157       for output and interpolation of input fields onto model grid)
158    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
159       Affects results of exp. rotating_tank ; update output.txt.
160    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
161          and taking the square quantity and/or using a fraction-weight field.
162    o fix aim_diagnostics_init.F mate numbers.
163    o add mnc output capability to diagnostics/diagstat and update
164      our cvsignore files for the ACSII output generated
165    
166    checkpoint57k_post
167    o lab_sea now uses diagnostics package and provides a suite of
168      new EXF diagnostics output.
169    
170    checkpoint57j_post
171    o exf
172      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
173        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
174        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
175      * extended diagnostics output
176        - now includes all EXF variables
177        - hs, hl moved to common block
178        - separate S/R for diagnostics, called after ctrl vector is added
179        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
180        - EXFqnet contains true Qnet (i.e. includes qsw)
181      * updated verif. lab_sea, global_with_exf
182      * Rearranging hflux (exf_mapfields -> exf_getforcing)
183        to ensure that diagnostics sees a true EXFqnet
184    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
185    o diagnostics pkg: change pointers so that 1 diagnostic can be used
186      several times with different frequencies.
187    o mnc-ify the thsice package as requested by Daniel Enderton
188      - the monitor--MNC output needs work
189      - many attributes need to be added (most are currently blank)
190    o mnc-ify theaim_v23 package as requested by Daniel Enderton
191      - many attributes need to be added (most are currently blank)
192    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
193    o add Sadourny like discretization to the 4th.O vorticity advection scheme
194    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
195      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
196         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
197    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
198     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
199    
200    checkpoint57i_post
201    o Diagnostics package was changed: diagnostic allocation is now deactivated
202      by setting an empty file name in the namelist (used to be by setting 0 frequency)
203    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
204      add 1rst Order upwind vertical Shear.
205    o add a quick fix for A/B checkpointing in OFFLINE mode
206    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
207      end-run around the C/Fortran linking horror in eesup/src/timers.F
208    o added pkg/runclock: allows user to terminate run based on wall clock
209    o added non-hydrostatic scaling parameter: nh_am2
210    o pkg/my82: futile attempt to make results compiler-independent by adding
211      some "_d 0", etc. no effect.
212    o for mnc output, fill the 'T' coordinate var with myTime and create a
213      separate 'iter' variable for iteration count
214    o pkg/diagnostics:
215      add new capability: output of Global/Regional & per-level statistics ;
216      tested against monitor output (including land & thSIce) on various exp.
217    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
218    
219    checkpoint57h_done
220      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
221      data.diagnostics, data.gchem, data.ptracers) is done.
222    
223    o pkg/diagnostics: prepare for Global/Regional statistics.
224      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
225    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
226      and rename it: DIFFERENT_MULTIPLE
227    
228    checkpoint57h_post
229    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
230    o pkg/diagnostics: change output frequency, now in seconds (instead
231      of Nb of iterations). This requires to change data.diagnostics.
232    checkpoint57h_pre
233    
234    o in mnc, let the user create the output dir if both mnc_outdir_date
235      and mnc_outdir_num are false
236    o add fflags() to pkg/diagnostics which allows one to specify, on a
237      per-file basis, the file precision [default behavior is unchanged]
238    o added diagnostics to pkg/kpp, including computation of mixed layer
239      depth based on a temperature/density criterion
240    o updated verification/natl_box to test the new pkg/kpp diagnostics
241    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
242    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
243    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
244      not mnc -- this mistake was found by JMC and is now corrected
245    
246    checkpoint57g_post
247    o add Adams-Bashforth 3rd Order time stepping:
248      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
249      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
250    checkpoint57g_pre
251    
252    o make lambda[Theta,Salt]ClimRelax spatially varying
253      (default remains spatially uniform constant based on tau)
254    o added new control variables
255      * init. uVel, vVel, etanN
256      * lambda[Theta,Salt]ClimRelax
257    o separate masks used for ctrl_pack/unpack 'from write_grid' output
258      (suggested by G. Forget)
259    
260    checkpoint57f_post
261    o add parameter "baseTime" = model base time = time at iteration zero
262      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
263      account for baseTime shift
264    o move Coriolis arrays from PARAMS.h to GRID.h
265    checkpoint57f_pre
266    
267    o mnc-ifying the seaice package
268    o introduced an alternative length scale calculation for use in the limiting
269      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
270    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
271    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
272      as well as grad(vort3).  Made it compatible with both approximate form
273      for the cubed sphere and full form of these gradients.  Added flag
274      useFullLeith to select between approximate and full form.  
275    o add "d0" in getcon.F to reduce differences between compilers/platforms
276      update output.txt of exp. fizhi-gridalt-hs
277    o change port_rand funtion to allow to set the seed.
278    o fix obscure MNC bug involving conversion between reals and integers
279      - it caused no problems with certain (eg. gcc, ifc) compilers but the
280        new version is now more standards-compliant
281    o adjoint-related modifications
282      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
283      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
284      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
285    
286    checkpoint57e_post
287    o Adding eddy stress controls a la Ferreira et al.
288    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
289    
290    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
291      update output.txt of exp. fizhi-gridalt-hs
292    o add more "Z" dimensions and associated coordinate vars to MNC
293    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
294    o parameter calendarDumps: when set, approximate months (30-31 days) and years
295      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
296      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
297      months and years.  Requires pkg/cal.
298    o diagnostics: add pickup functionality
299      - off by default for backwards compatibility
300      - current version only uses MDSIO -- MNC will be added
301    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
302    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
303    
304    checkpoint57d_post
305    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
306    o modify verification/ideal_2D_oce so that it tests the creation of mnc
307      output from the diagnostics package
308    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
309    o make genmake2 more portable by using ".$FS" instead of ".f" for more
310      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
311    o add coordinate variables to the MNC output from the diagnostics package
312    o change MNC-flags default value: true when useMNC=TRUE
313    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
314      the ability (off by default) to read the grid information using MNC
315    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
316    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
317    o do snap-shot diagnostics at the middle of the time-interval (instead of
318      at the end).
319    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
320      new test for AIM with thSIce + slab-ocean
321    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
322    o move state variable diagnostics to the beginning of the time step ;
323      (note: still needs some work specially for snap-shot diagnostics)
324      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
325    
326    checkpoint57c_post
327    o Change testing option (-ieee) to get closer agreement between g77 & ifort
328    o generate new output.txt files on faulks with g77 & the new -ieee option
329    checkpoint57c_pre
330    
331    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
332      update output.txt of exp. global_ocean.90x40x15
333    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
334      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
335    o add saltFlux(+File) forcing capability with periodicExternalForcing
336    o allow to use pkg diagnostics for GM-Redi & ThSIce output
337    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
338    o improvements for the MNC output from DIAGNOSTICS:
339      - correct handling of the unlimitied dimension
340      - all dims now have associated coordinate variables
341      - variables located at U, V, and Corner ("Z") points are now written
342        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
343        *all* data points are output
344    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
345    o added pkg/seaice/seaice_monitor.F
346    o mdsio_readfield.F can now read files visible only to master MPI process.
347    o pkg/seaice: some test code for ice-modified ocean stress
348    o exf_getffields interpolation defaults to bilinear for all scalar forcing
349      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
350      spurious negative numbers for precipitation and humidity.  Will cause
351      some small numerical differences for integrations using pkg/exf/exf_interp.F.
352    o pkg/ctrl/
353      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
354        May be enabled via doPackDiag
355      *  introduce z-scaling of
356         + gradient (doZscalePack) and
357         + control (doZscaleUnpack)
358    o pkg/mdsio/
359      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
360      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
361    
362    checkpoint57b_post
363    o simplify options in diagnostics_fill arguments (remove weird combinations)
364    o fix MNC coordinate variables so that they now contain per-face index
365      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
366      general, EXCH2 grids are only aligned to a "local" coordinate system
367    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
368    o Implement instantaneous output within pkg diagnostics:
369      setting a negative frequency in data.diagnostics produces
370     "snap-shot" output (as opposed to time-average if freq > 0)
371    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
372      NOTE: change ptracer diagnostics name: use 2 characters to work with
373            more than 9 tracers. Add also diagnostics of advect & diffus flux.
374    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
375      becomes the coordinate variable for the 'T' dimension
376    o add CF-style coordinate variables to MNC
377      - just a first cut:  numbers are meaningless on the cubesphere and
378        missing along the T axis but otherwise it works!
379    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
380    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
381    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
382      this is based directly on what the model compute, so that the content of
383      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
384    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
385    o clean up build options files for SunOS, in particular
386      - remove -traditional from xmakedepend
387      - change -xarch=v9 to -xarch=native for f77
388      - restore use of make (not gmake)
389      - add CC=gcc if using g77
390    o changes per discussion of AM, JMC, & EH3 today:
391      - move redundant "grid" variables out of "state" -- in preparation of
392        creating proper CF-style coordinate variables and in recognition
393        that any/all grid variables can be easily copied (eg. w/NCO) from
394        the grid files into any of the other NetCDF files
395      - *always* output grid variables with MDSIO (this will eventually be
396        changed)
397      - output MNC grid file if useMNC is true
398    o every instance of _END_MASTER() has been found and replaced with
399      _END_MASTER( myThid ) in order to satisfy certain picky Sun
400      preprocessors
401    o re-arrange diagnostics pkg initialisation:
402     - allow each package to extend the available diagnostics list
403     - add some checking and fix small problems (multi-threaded, ...)
404     - new S/R diagnostics_fill (replace fill_diagnostics):
405       look through the short list of active diag. (instead of the long list)
406       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
407    
408    checkpoint57a_post
409    o this set of changes restores TAMC compatibility
410      tested for global_ocean.90x40x15 adjoint on trough
411      (what a pain)
412    
413    checkpoint57a_pre
414    o some modifs in tools/build_options for sunos
415    o call ctrl_pack for ctrl at end for optimcycle=0
416    
417    checkpoint57
418    o add horizontal bi-harmonic viscosity for vertical velocity
419      - new parameter viscA4W (defaults to viscA4)
420      - affects only non-hydrostatic code
421      - to be done: no-slip lateral boundary conditions
422    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
423    o implement Implicit Vertical advection for pTracers
424    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
425      (implemented also for implicit vertical diffusion & advection)
426    o OBCS: extend application of tracer open boundary conditions
427      to a strip beyond the boundary of width Olx/Oly
428    o add call monitor to TAF set of required calls (flow directives)
429      and include in natl_box_adjoint
430    o untangle a few ifdefs related to cost, ctrl, autodiff
431      untangel a few ALLOW_ECCO_OPTIMIZATION
432    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
433      (theta2, salt2 in ecco_cost_weights)
434    
435    checkpoint56c_post
436    o OBCS as control variables
437      - update ctrl_ad_diff.list, obcs_ad_diff.list
438      - remove balance of obcs controls from default
439      - fix index bug nobcs in ctrl_init
440      - fix dummy fields filen in ctrl_pack
441      - add dummy weights for obcs
442    o lsopt: comment out fort.94 output
443    o optim:
444      - remove unnecessary header files
445      - adjusted namelists
446      - add xerbla.F to Makefile
447    o exf:
448      - multiple modifications of exf_check_range
449      - unit change in exf_init_runoff from [m/year] to [m/s]
450    o mdsio:
451      - i/o-vector change debugLevel from debLevA to debLevB
452    
453    checkpoint56b_post
454    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
455      is called from DO_THE_MODEL_IO
456      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
457      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
458      - clean up PTRACERS_WRITE_TIMEAVE a little
459    o add another verification experiment that tests both the cfc-pkg and
460      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
461      reactive tendencies treated inline with regular timestepping
462    o testreport previously did a lousy job of comparing small numbers, so
463      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
464      implemented in the little c-progam tmp_cmpnum.c which is embedded in
465      testreport.
466    o ptracers_monitor: bug fix for MPI
467    
468    checkpoint56a_post
469    o GCHEM: finish reorganizating the package
470      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
471        (introduces another 3D-array for each passive tracer, but only if
472        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
473        gchemTendency is not needed because the timestep is done separately)
474      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
475      - GCHEM is now---more or less cleanly---separate from PTRACERS
476      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
477        so clear to me how that should be done in a general way.
478    o CFC: improve formatting of output in CFC_ATMOS
479    o PTRACERS:
480      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
481        that ALL experiments with ptracers enable can be checked. This makes
482        GCHEM_MONITOR obsolete.
483      - include a runtime parameter PTRACERS_monitorFreq that defaults to
484        monitorFreq
485      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
486    o add PTRACERS (PTR0[1-5]) to testreport output
487    o exf_check_range:
488      * default changed to .TRUE.
489      * will check values for niter0 if debLevA, every timestep if debLevB
490      * STOP in exf_check_range if 'out of range'
491      * range chosen generous to allow for potential extema
492      TBD: a version with stricter range
493           permitted range would be runtime parameters
494    o GMredi:
495      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
496      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
497      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
498    o GCHEM:
499      - move call to GCHEM_FORCING_SEP, so that it is now called before
500        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
501      - introduced a useGCHEM runtime flag and applied it everywhere.
502      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
503        this flag is now only visible within GCHEM-pkg routines.
504      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
505        be replaced by a 3D array that is computed before thermodynamics; for
506        this, the tracer ID iTracer had to be included into the parameter list
507        of ptracers_forcing
508      - set up forward_step to call gchem_forcing, that will replace
509        gchem_forcing_int in ptracers_forcing
510      - cleaning up
511    o small cleaning of exch2: remove files that are also in eesupp/src
512    
513    checkpoint56
514    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
515    o mnc: cleanup "full" files--fixes out-of-memory problem
516    o ECCO-GODAE
517      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
518      * fully merged and updated from SIO code
519        windstress sign change affects
520        - exf_inscal_[u/v]stress
521        - sign of xx_tau[u/v] adjustments
522        - signs in cost_scat
523      * ctrl_get_gen: avoid update of tau[u/v] for first few days
524      * natl_box_adjoint updated and compressed
525      * 2-level checkpoint switch added
526        (tested in EXP. 1 of natl_box_adjoint)
527      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
528    o SVD
529      * first complete, non-hacked version for SVD calculations
530      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
531        performed via direct access files admtlm_vector.it????
532        (via ctrl_[un]pack)
533      * optimcycle is used for ARPACK iteration counter
534        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
535      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
536        and add linear transforms where necessary
537      * controls are initial/final SST, SSS (can be extended; need to check
538        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
539    o mdsio: filename info to both stderr, stdout
540    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
541      from sign change
542    
543    checkpoint55j_post
544    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
545      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
546    o add consistent build directories and .cvsignore files to verification
547    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
548    o make all subroutines 30 or less characters in length for certain older
549      compilers to work (a thorough search only turns up two routines in
550      pkg/ptracers)
551    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
552      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
553    
554    checkpoint55i_post
555    o change arrays for total vertical diffusivity (2.D if explicit,
556      3.D if implicit) ; each ptracer uses its own background value.
557    o added mnc/NetCDF output capability to ocn_compon_interf
558      - added bits to verification/cpl_aim+ocn so that it can run on
559        ITRDA and other clusters without the mpirun "-wd" option
560    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
561      configuration
562    o give MNC the ability to create additional files rather than
563      exceeding a specified file size limit "MNC_MAX_FILESIZE"
564      - the default is just less than 2GB which is a practical limit
565        on many systems
566    o Compute the non-local term using either KPP vertical diffusivity (=default)
567       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
568    
569    checkpoint55h_post
570    o add verification test "vermix"
571    o remove all the *_ioinc flags and replace with the single global
572      outputTypesInclusive flag
573    o allow to set a vertical profile of vertical diffusivity for T & S
574    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
575    o useMNC moved from data.mnc to data.pkg
576    
577    checkpoint55g_post
578    o Renaming carbon AD experiments to comply with testreport conventions
579    o Updating adjoint of Held-Suarez hs94.1x64x5
580    o Fixing directives for non-ECCO forward_step, after ECCO directives
581      have been fixed to avoid recomp. of do_oceanic_phys
582      Works well for global_ocean.90x40x15,
583      but recomp. issue remains for carbon
584    o Updating adjoint output for natl_box_adjoint after
585      pkg/ecco has been modified (see taga c55d_post)
586    
587    checkpoint55f_post
588    o rename to timeave_init_fixed
589    
590    checkpoint55e_post
591    o some delicate re-shuffle of store directives to avoid one
592      extra call of do_oceanic_physics
593      affects ecco_the_main_loop.F, do_oceanic_physics.F
594      checkpoint_lev1_directives.h
595    o NB: this may break global_ocean adjoint temporarily,
596      but it is clear how to fix it. Will do later, need this now.
597    
598    checkpoint55d_post
599    o ECCO specific cost function terms (up-to-date with 1x1 runs)
600    o ecco_cost_weights is modified to 1x1 runs
601    o modifs to allow observations to be read in as
602      single file or yearly files
603    o enable to read exf forcing fields as either
604      single file or yearly files (flag useExfYearlyFields)
605    checkpoint55d_pre
606    
607    o switch between 2-level and 3-level checkpointing
608    o add ability of MNC to write local and "partial" (eg. 2D slices where
609      the full 3D field is never actually stored) arrays to NetCDF files
610      with the correct (that is, the complete multi-dimensional) set of
611      array indicies
612      - used in mom_vecinv() to write the diagFreq output
613      - tested (demonstrated) in verification/aim.5l_cs
614    o further mnc-ification
615      - add verification/lab_sea to the list with mnc setups
616      - fix undefined mnc v-names in cd_code
617      - add kpp to mnc output (both snapshot and timeave)
618    o non-hydrostatic code
619      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
620        in calc_gw.F
621      - defaults to viscAh
622      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
623        friction or Leith) in non-hydrostatic mode, as long as there is
624        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
625    o pkg/cost
626      extend simple cost functions to treat time mean quantities
627      (T,U,V) via cost_accumulate_state from cost_tile
628    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
629        be 2 times larger than the minimum size the advection scheme requires.
630        now get a perfect conservation of salt in advect_cs test-exp (updated)
631    o GGL90 (Gaspar's TKE mixed layer)
632      - add horizontal diffusion of TKE, requires exchanges in
633        do_fields_blocking_exchanges, horizontal diffusivity is zero by
634        default. In OPA there is no horizontal diffusion of TKE but the
635        mixing coefficients are computed from a horizontal average of TKE of
636        6 points or so. I think that diffusion has a little more physical
637        justification.
638      - clean up ggl90_calc in the hope of reducing memory usage (this hope
639        was in vain)
640      - mask tke-variable in ggl90_init
641    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
642    o fix biharmonic diffusion on CS-grid.
643    o more obcs stuff
644      - added obcs_external_fields_load as an alternative to the EXF-pkg option
645        for reading boundary values. This routine is called from
646        obcs_prescribe_read
647      - updated obcs_check
648      - changed sponge layer relaxation parameter units for days to seconds
649      - turned off sponge layer by default
650      - changed argument list of OBCS_CALC to myTime+deltaTclock
651      - fixed about 35 bugs in obcs_external_fields_load
652    
653    checkpoint55c_post
654    o obcs stuff
655      - new runtime flags useOBCSprescribe, useOBCSbalance
656      - re-arranged obcs_calc
657      - moved exf_getobcs to obcs_prescibe_read
658        obcs_prescibe_read is called after ORLANSKI stuff
659        and independent of it (executable can contain all).
660      - updated obcs_check
661      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
662        These may be necessary only if tangential velocities are
663        prescribed at OB, not sure, needs testing.
664    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
665      which simplifies the calls and passes the ifc check-bounds test
666    
667    checkpoint55b_post
668    o add a 2D scalar, Z location, exchange_2 routine.
669    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
670      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
671      affects advect_cs results (for the wrong reason): update output.txt
672    o use a more standard discretization for biharmonic viscosity ;
673     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
674      affects results of dome set-up: update output.txt
675    o fix gad_advection.F (CubedSphere part), back to version 1.23
676    o fix bug in mom_vi_del2uv.F (CubedSphere part).
677    
678    checkpoint55a_post
679    o merged code to
680      * prescribe/read time-dependent open boundaries
681        (works in conjunction with exf, cal)
682      * sponge layer code for open boundaries
683      * each boundary N/S/E/W now has its own CPP option
684        (healthy for the adjoint)
685    
686    checkpoint55
687    o up-to-date adjoint of previous breaks
688      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
689      - global_ocean_ebm: adjoint still needs fix (TLM ok)
690      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
691      - carbon: * remove tr1-related adjoint verification
692                * add ptracer as control variable
693    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
694      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
695    
696    checkpoint54f_post
697    o in verification/carbin/ remove experiment related to
698      ALLOW_PASSIVE_TRACER (array tr1 etc)
699      code_ad/ input_ad/ results_ad
700    
701    o add two new packages
702      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
703        + subject to optimization (memory)
704      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
705        + subject to reordering (many GOTOs in the original code)
706        + so far opps is called for every (i,j) point, and then operates in
707          the vertical; one may want to reorder the scheme in order operate in
708          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
709          fields)
710    o overhaul of IO so that we now have flags for MDSIO and/or MNC
711      - all verification tests compile and run with linux_ia32_g77
712      - defaults are compatible with current input files--nothing
713        should change if you were not previously using MNC
714      - MNC output has been added in numerous places (eg. timeave)
715        but there are still a few writes not yet do-able with MNC
716        (this is in progress)
717      - flags now allow for either/or/both use of MDSIO and MNC and
718        documentation will soon follow
719      - numerous small formatting cleanups for ProTeX
720    o add version info (via BUILD_INFO.h) to MNC and stdout
721    
722    checkpoint54e_post
723    o add two new packages
724      - pp81 (Packanowski and Philander, 1981), Richardson number and
725        stratification dependent mixing
726      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
727      - these scheme operate in a similar manner as KPP (without ghat, of
728        course), however there is only one diffusivity that is used for both
729        temperature and salinity (and passive tracers)ç
730    o add offline package
731    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
732      provided by Stephanie Dutkiewicz
733    o genmake2: add ability to search for C compilers and cleanup test output
734      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
735    
736    checkpoint54d_post
737    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
738    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
739      leading to additional shift by 5 days each year of integration
740       (i.e. leading to considerable offset over the years)
741    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
742    o start with no AB and no initial filtering (staggerTimeStep):
743      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
744    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
745      (external loading & cpl import/export stay in forward_step.F)
746    o update coupling interface to work with new staggerTimeStep
747    o change MDSIO ptracers_pickup.
748    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
749    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
750    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
751    
752    checkpoint54c_post
753    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
754      this affects (truncation error) output.txt of test-exp:
755       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
756    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
757    o change Qnet to always be the net heat flux, (+upward).
758      affects (truncation error) output of natl_box exp.: updated
759    o define the max number of passive tracers in PTRACERS_SIZE.h
760    o start to test mnc routinely in exp0
761    o add sea-ice loading (sIceLoad) as a new forcing field.
762    
763    checkpoint54b_post
764    o add testreport "-j JOBS" option for parallel builds (tested and pretty
765       impressive on Altix and Opteron systems)
766    o diagnostics can now write NetCDF files through the mnc package
767    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
768    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
769    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
770      affects (truncation error) output of lab_sea & natl_box exp.: updated
771    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
772    
773    checkpoint54a_post
774    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
775    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
776    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
777    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
778      + internal_wave (shift in writing cg2d_ini_res)
779    checkpoint54a_pre
780    
781    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
782      - modified verification/lab_sea and natl_box_adjoint accordingly
783    
784    checkpoint54
785    checkpoint53g_post
786    o prepare splitting of thermodynamics: store convect.counter in common block
787    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
788      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
789    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
790    o new parameter "nShapS": allow to treat differently S from T (nShapT)
791    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
792    o restore adjointability
793    
794    checkpoint53f_post
795    o modifications that affect AIM experiment results (update output.txt):
796      - no advection of S at top interface Nr (pkg/generic_advdiff)
797      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
798    o AIM pkg:
799      - include stability function into surf.Flux derivative relative to Tsurf
800      - calculate clear-sky radiation & surface temp. change (for diagnostics)
801    
802    checkpoint53e_post
803    o merged cylindrical coord configuration
804    o added rotating_tank experiment
805    checkpoint53e_pre
806    
807    checkpoint53d_post
808    o faulks upgraded: re-generate output.txt that have changed:
809       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
810    o Added Bryan and Lewis, 1979, vertical diffusivity profile
811    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
812    o added Sadourny discretization of Coriolis
813      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
814      - re-enabled use of omega3 (useAbsVorticity)
815    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
816      vector-invariant equations
817      - note: does *NOT* yet use same variable visc. for no-slip BC's.
818    o recoded the lateral boundary conditions for non-hydrostatic w, this time
819      hopefully without new bugs
820      - still to do: biharmonic friction for non-hydrostatic w
821    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
822    o regenerated output for global_ocean_ebm (using -ieee)
823    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
824      of mom_common/
825      - simple re-arrangement of instructions within computing loop
826    checkpoint53d_pre
827    
828    checkpoint53c_post
829    o new version of coupler for AIM+thSIce and Ocean models
830     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
831     - land: change Evaporation of snow
832     - aim with thSIce: fix bug in snow-precip.
833    o changes to calc_gw.F
834     - bug fix for w^2 term near the bottom boundary
835     - (hopefully) improve the lateral slip boundary condtions for use with
836        partial/looped cells
837      - because the bug fix changes two verification experiments anyway (exp5
838        and plume on slope), change the lateral boundary condition from half slip
839        to the value of no_slip_sides
840    o ebm package wasnt quite up to the parallel task. Fixed that.
841    o Adjoint of EBM package + verification
842      * TLM OK
843      * ADM not sufficient accuracy yet (needs further testing)
844    
845    checkpoint53b_post
846    o Commiting new energy balance model to repository
847      * package is pkg/ebm
848      * verif. is verification/global_ocean_ebm
849      * references are in ebm_driver.F
850    C      * X. Wang, P. Stone and J. Marotzke, 1999:
851    C        Global thermohaline circulation. Part I:
852    C        Sensitivity to atmospheric moisture transport.
853    C        J. Climate 12(1), 71-82
854    C      * X. Wang, P. Stone and J. Marotzke, 1999:
855    C        Global thermohaline circulation. Part II:
856    C        Sensitivity with interactive transport.
857    C        J. Climate 12(1), 83-91
858    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
859    C        Destabilization of the thermohaline circulation
860    C        by atmospheric eddy transports.
861    C        J. Climate 7(12), 1870-1882
862    o Will need long integration testing.
863    checkpoint53b_pre
864    
865    o created pkg/mom_common in preparation for variable viscosity code
866    o renamed and split ini_mnc_io
867    o pkg/land: only liquid water can diffuse or run-off
868    o AIM using land: soil wetness availability account for snow
869    o added printMapIncludesZeros to EEPARMS namelist
870    
871    checkpoint53a_post
872    o restore TAMC compatiility for exf_constants.h
873      (no usage of _d in .h)
874    o Additional storing in KPP in an attempt to fix
875      TAMC problem with adjoint of KPP code.
876      (no success...)
877      Identical code works fine with TAF.
878    o Fixed verification/natl_box_adjoint experiments.
879      Initial conditions for Experiments 4 and 5 are now
880      set to "SEAICE_initialHEFF=0", which is more reasonable,
881      and hence gives results closer to that of Experiment 2.
882      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
883    
884    checkpoint53
885    o stable checkpoint with up to date adjoint
886      TLM tests only run for 1st grdchk at the moment. Its unclear if
887      this is a code problem or a problem with resetting code for g_
888      variables that is being autogenerated wrong.
889      Otherwise:
890       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
891       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
892         are both still in chaos following their security messes.
893    
894    checkpoint52n_post
895    o various build (mostly genmake2) changes including:
896      - ability to build/run more easily within Cygwin and MacOS X
897      - more complicated Makefiles with a stronger dependence on Gnu Make
898    o pkg/seaice modifications
899      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
900        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
901        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
902      - changed proxy for geostrophic velocity and updated
903        verification/lab_sea/results/* accordingly
904      - removed ADI dynamic solver from pkg/seaice
905      - replaced all occurrences of 1/CSTICE or 1/CSUICE
906        they caused a segmentation fault under certain circumstances
907      - removed unused field WATR
908    o bug fix in exf-package:
909      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
910         now reflect that.
911    o small fixes in the cal-package:
912      - set reference date to first of January for the 'model'-calendar
913      - failing of cal_CheckDate in cal_FullDate now actually results in a
914        warning
915    o small modifications in exf-package to increase flexibility:
916      - change climtempfreeze from a constant to a runtime parameter that
917        is specified in data.exf_clim (default = -1.9)
918      - introduce runtime parameter windstressmax (default = 2.0) that is
919        specified in data.exf
920    o fix in pkg/thsice:
921      - update Evap (Tsf changes) to be consistent with Latent heat flux
922      - maintain snow precipitation unchanged (even if Tsf >=0).
923     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
924    
925    checkpoint52m_post
926    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
927      this does not change any of the results, because myIter=0 in swfrac always
928      lead to jwtype=2 (the default anyway), but the call makes little sense
929      as a default
930    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
931    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
932      atmospheric model (AIM) to use it ; add a "slab ocean" component.
933    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
934    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
935    o extending useSingleCpuIO option to work with new exch2 I/O format
936      - old-style, missing-tile I/O is still accessible by defining CPP
937        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
938    o monitor package can write to NetCDF files and/or STDOUT
939    o fix re-definition bug in MNC_GRID_INIT_ALL()
940    o doc/api_reference added
941      - a framework for building an API Reference Manual using all
942        the "protex" comments embedded in the code
943      - see pkg/generic_advdiff, pkg/mnc for examples
944    o MNC:
945      - make myThid the last argument for all subroutines
946      - new default for the grid files: NO halos
947      - add useMNC and other run-time flags
948      - separate per-file-group handling of the unlimited dimension
949      - early initialization of MNC w/ flags read at the eeboot stage
950        and lookup tables set in initialize_fixed
951      - write all MNC output to a freshly-created directory
952    o thermodynamics sea-ice (thsice) is now tested with testreport.
953    o test exp. advect_cs: use the standard cs32 grid ; update output.
954    o Added functionality to grdchk:
955      pick global i,j,k position (or nearest wet) where to perform check.
956    
957    checkpoint52l_post
958    o new land formulation:
959      a) use ground enthalpy as prognostic variable to ensure exact
960         energy conservation.
961      b) account for water temperature and for latent heat of freezing
962         in all processes (rain, run-off, ground storage)
963      c) compute surface and ground temperature implicitly.
964    o aim_v23 modification for new land model:
965      a) Treat separately land / ocean / sea-ice surface fluxes
966         to allow implicit computation of land & sea-ice surface temp.
967      b) add snow precipitation.
968    checkpoint52l_pre
969    
970    o fix problem (when 1 tile is empty) in min/max monitor.
971    o fix bug in timeAve (u,vZetatave in common block)
972    o no restoring terms under ice for pkg/seaice
973    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
974    o bug fix for pkg/seaice pickups
975    o change MNC call locations and add coordinate attributes
976    o mask vorticity at the corner ; affects global_ocean.cs output
977    o fix ini_curvilinear_grid ; test CS experiments with mpi
978    o aim.5l_cs: modify sea-ice fraction input file ; update output
979    o exf: Adding simple range check routine for exf fields after read
980    
981    checkpoint52k_post
982    o removed top-level directory "diags"
983      - we migrated these functions to pkg/timeave a long time ago
984    o fixed bug introduced in pkg/monitor
985    o accuracy ctrlprec = 32 insuffient for gradient checks using
986      averaged fields (I/O via cost_averages)
987      -> use ctrl.h in active_file*.F to control I/O precision.
988    o paramter list of CALL ADTHE_MAIN_LOOP
989    o added initial do_the_model_io to ecco
990    o set all ...Freq to zero after cost_final
991      taveFreq, dumpFreq, pChkptFreq
992    o MAIN and ECCO differentiability restored
993    
994    checkpoint52j_post
995    o fix nchklev in tamc.h for global_ocean...
996    o Bringing flow and store directives up-to-date
997    o Really weird thing!
998      call do_the_model_io from the_main_loop with parameters
999      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
1000      TAF places a faulty re-call of initialise_varia
1001      after cost_final call which should not be there!
1002    checkpoint52j_pre
1003    
1004    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
1005      error messages
1006    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
1007    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
1008      debug output
1009    o modfied mdsio_writefield.F to handle non-global files under exch2
1010    o update AIM Cubed-Sphere exp (aim.5l_cs):
1011      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
1012    o update AIM Equatorial Channel exp:
1013      use standard aim_v23 pkg and change the SST fields to be more realistic.
1014    o globalFile now works with exch2
1015    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
1016      mon_vort3.F to make exch2 friendly with >1 tile per cube face
1017    o limit timeave output for hi-res integrations
1018    
1019    checkpoint52i_post
1020    o removed CPP_EEOPTIONS.h from verification/*/code
1021    o updated the tiling for global_ocean_pressure
1022    checkpoint52i_pre
1023    
1024    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
1025      the old pkg/aim).
1026    
1027    checkpoint52h_pre
1028    o shortened offending lines in exch2_send_rx?.template
1029    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
1030    o genmake2: add build & execute test for NetCDF code
1031    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
1032      old grid files, moved CPP_EEMACROS.h to pkg/exch2
1033    o added useSingleCPUIO flag to monitor.F and mon_out.F
1034    o added temporary hack for sea-ice dynamics on the cube:
1035      metric terms are ignored and it is assumed that
1036      there is no sea-ice on cube faces 1, 2, 4, and 5.
1037    
1038    checkpoint52f_post
1039    o added exch2 cube routines to pkg/exch2
1040    o modified hs94.cs-32x32x5 to use it
1041    o added new grid files to hs94.cs-32x32x5
1042    checkpoint52f_pre
1043    
1044    checkpoint52e_post
1045    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
1046      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
1047    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
1048      to work with implicit vertical advection and AB ;
1049    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
1050    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
1051     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
1052    checkpoint52e_pre
1053    
1054    o fix bug in impldiff when Nr=1 or Nr=2.
1055    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
1056    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
1057    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
1058      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
1059    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
1060    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
1061    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
1062    
1063    checkpoint52d_post
1064    o re-tiled many expts to allow comparison in multi-processor mode
1065      - updated output accordingly
1066      - changed hs94.128x64x5 to use intial T from file rather than use the
1067        random number generator
1068    o add infrastructure in model routines for fizhi and gridalt packages
1069    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
1070    o changes to permit hi-res, cubed-sphere, configuration
1071      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
1072      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
1073      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
1074        of surface winds for the cube
1075      (A verification experiment, based on global_ocean.cs32x15, but with
1076       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
1077       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
1078       complete with example surface forcing files and matlab scripts to look
1079       at the output and compare it with that of global_ocean.cs32x15.)
1080    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
1081       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
1082       to conform to the common rule.
1083    o check-in the first version of the coupler + interfaces for multi-components
1084       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
1085       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
1086       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
1087       - ocean and atmos. share the same horizontal grid (no interpolation).
1088       - exchanges between component and coupler is done in forward_step
1089    o new verification experiment, cpl_aim+ocn:
1090       coupled ocean - AIM atmosphere on cs32 grid.
1091    
1092    checkpoint52d_pre
1093    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
1094    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
1095    
1096    checkpoint52c_post
1097    o Fixing OPTIONS files for use of exf:
1098      - ALLOW_ECCO not needed
1099      - ECCO_CPPOPTIONS.h should not be included from
1100        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
1101        as has been the case in the past
1102      - All cal/exf related options are currently set in
1103        single header file. Should remain so until we
1104        agree on a consistent new policy.
1105    o Removed all CPP options for cal package.
1106      cal has no more CPP options.
1107    o modified STOREs in GAD_ADVECTION
1108    o corrected key comp. for passkey
1109    
1110    checkpoint52b_post
1111    o new version: "thsice" of thermodynamic sea-ice pkg:
1112     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
1113     - modify fluxes but do not change theta directly;
1114     - light cleaning of bulk_force pkg (still needed with thsice).
1115     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
1116       + output_thsice.txt to test thsice & bulk_force pkgs.
1117    o put back grid & coriolis monitor output.
1118    checkpoint52b_pre
1119    
1120    o call "do_the_model_io" at the beginning (=> dump initial state)
1121    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
1122    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
1123      (need info on NUMBER_OF_PTRACERS)
1124    o missing PTRACERS headers in some routines
1125    o default tamc.h in pkg/autodiff supposed to crash
1126      to ensure proper customization
1127    
1128    checkpoint52a_post
1129    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
1130      - moved surfaceTendencyTice from pkg/seaice to main code
1131      - subroutine FREEZE_SURFACE now limits only surface temperature
1132        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
1133        => new output.txt for global_ocean.cs32x15 & global_with_exf
1134      - keep the old version of FREEZE for backward compatibility;
1135        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
1136      - corresponding modifs for TAF directives
1137    o added surface flux output variables to TIMEAVE_STATVARS
1138    o time-averaged output for pkg/ptracers
1139    o fix problem with ECCO-related divided adjoint
1140      snapshot file was missing some ad-variables,
1141      but no warning issued by TAF
1142    
1143    checkpoint52a_pre
1144    o some bug fixes for #undef REAL4_IS_SLOW
1145    
1146    checkpoint52 = ecco_c52_e35
1147    o after testing adjoints of checkpoint51u_post
1148    
1149    checkpoint51u_post
1150    o this is the post-merge tag of the ecco-branch
1151      (needs another clean checkout and re-testing)
1152    o various natl_box_adjoint configs and results
1153      but no input fields
1154    o obcs adjoint not yet merged!
1155    o adding ECCO global 1x1 and 2x2 degree configs
1156    o updated/extended some store directives for seaice
1157    o pkg/ecco now containes ecco-specific part of cost function
1158    o top level routines the_main_loop, forward_step
1159      supersede those in model/src/
1160      previous input data.cost now in data.ecco
1161      (new namelist ecco_cost_nml)
1162    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1163    
1164    checkpoint51t_post
1165    o this is the pre-merge tag of the ecco-branch
1166    
1167    checkpoint51s_post
1168    o cleanup: removed various obsolete #define-s
1169    o pkg/grdchk
1170      - renamed 'ph-grd 3' to 'grad-res'
1171      - merged from ecco-branch
1172        (remaining bug fixes for obcs gradient checks)
1173      - additional high-precision output for testreport
1174        (grep for 'precision_grdchk_result')
1175    
1176    checkpoint51r_post
1177    o cleaned up or removed CPP_OPTIONS.h files
1178    o updated results for some of the tests to reflect the new
1179      optfiles (-ieee: -O0 instead of -O3)
1180    
1181    checkpoint51q_post
1182    o cd_code:
1183      - moved cd_scheme.F -> cd_code_scheme.F
1184      - separate read_checkpoint from cd_code_ini_vars.F
1185      - separated cd_code part from write_checkpoint
1186      - updated AD_SOURCE, generated .flow
1187      - added CD_CODE_VARS.h to the_main_loop
1188      - Moving cd_code specific store dir.s to pkg/cd_code
1189    o ctrl package totally restructured
1190      - pack/unpack now optional and decoupled from
1191        xx_/adxx_ I/O
1192      - ctrl_pack/unpack cleaned
1193        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1194      - confined inclusion of AD_CONFIG.h to where necessary.
1195    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1196    
1197    checkpoint51p_post
1198    o create initial cd_code package
1199      - WARNING: the initialization of fields within packages
1200        is broken because INI_FIELDS (where READ_CHECKPOINT is
1201        called) is called *before* PACKAGES_INIT_VARIABLES.
1202        This seems to be backwards since
1203        1) its important to initially zero the entire field including
1204           the "halo" region
1205        2) zeroing needs to be done *before* reading pickup info
1206           and the pickup call might or might not happen in any
1207           particular run
1208      - this needs an overhaul for R2
1209    o cleanup verification/*/code/GMREDI_OPTIONS.h
1210    o cleanup testreport
1211    
1212    checkpoint51o_post
1213    o bringing AD-related verif's up to date with genmake2
1214      - carbon/
1215      - global_ocean.90x40x15/
1216      - hs.94.1x64x5/
1217      - (front_relax/ )
1218    o (more) consistent directory structure for AD-related verif.'s
1219    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1220    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1221    o bug fix in find_alpha.F for MDJWF:
1222      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1223        change rho -> rho-rhoConst
1224      - replace call find_rho to find_rhonum
1225    o initialisation of rFlx extended to full array (required by TAF)
1226      and shifted to thermodynamics
1227    o removed PTRACERS.h in ptracers routine
1228    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1229    o Correcting initialisations for fVerU, fVerV.
1230    o helping TAF to recognize dependency on kUp for
1231      fVerU, fVerV
1232    o Replacing delZ by delR in pkg/ctrl/
1233    checkpoint51o_pre
1234    
1235    o undid all of cp51 pending some cleanups and discussion
1236    o added the [#include "AD_CONFIG.h"] statement to all files that need
1237       it for adjoint/tl #defines
1238     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1239     o removed tools/genmake since it no longer works
1240    
1241    checkpoint51n_post
1242    o modifications to make FREEZE flux visible to pkg/kpp
1243      - moved surfaceTendencyTice from pkg/seaice to main code
1244      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1245      - subroutine FREEZE now limits only surface temperature
1246        (this means new output.txt for global_ocean.90x40x15,
1247         global_ocean.cs32x15, and global_with_exf)
1248    o added surface flux output variables to TIMEAVE_STATVARS
1249    
1250    checkpoint51n_pre
1251    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1252    o added [#include "AD_CONFIG.h"] to all files that use the following
1253      defines:
1254      - ALLOW_ADJOINT_RUN
1255      - ALLOW_TANGENTLINEAR_RUN
1256      - ALLOW_ECCO_OPTIMIZATION
1257    
1258    checkpoint51m_post
1259    o incorporating changes to get TAMC/TAF working in genmake2
1260      - added new TAMC/TAF targets to the Makefile
1261      - various cleanups related to package handling
1262      - these changes should have no impact on the forward model
1263    
1264    checkpoint51l_post
1265    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1266     - faster algorithm for cal_addtime.F
1267     - higher precision arithmetic, where needed
1268     - pkg/exf *startdate variables changed from calendar date to
1269       model integration time
1270    
1271    checkpoint51l_pre
1272    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1273    o enable to apply restoring on S & T only in a latitude band.
1274    o update output (external_forcing_surf modif. change truncation errors)
1275       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1276    
1277    checkpoint51k_post
1278    o change default to: useNHMTerms=.FALSE.
1279     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1280       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1281     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1282        exp1, ideal_2D_oce
1283     - change data file of oceanic exp (leave the results unchanged for now)
1284       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1285    o set gravitySign automatically according to the vertical coordinate used
1286      (and change sign: back to "logical" value: +1 when R increases downward)
1287    o added an include barrier to the default CPP_OPTIONS.h and
1288      removed the #include "PACKAGES_CONFIG.h" from it
1289    o fix a bug in mom_fluxform (from chk51j_post)
1290    
1291    checkpoint51j_post
1292    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1293    o adjusted some flow directives (dynamics, thermodynamics)
1294    o added cubed-sphere case to test cost function
1295    o heckpoint_lev?_directives.h now include
1296      pkg-specific directives, whenever those are enabled.
1297    o Moving pkg-specific flow directives to corresponding pkg
1298      Moving pkg-specific differentiation list to corresponding pkg
1299      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1300      ---> conventions are
1301           - pkg_ad.flow
1302           - pkg_ad_diff.list
1303           - pkg_ad_check_lev?_dir.h
1304    
1305    checkpoint51i_post
1306    o merge of the branch-genmake2
1307      - knowingly breaks the older genmake
1308      - automatic generation of all ALLOW_${PKG_NAME} defines
1309      - new testreport supersedes older testscript
1310    o large number of package inclusion and header cleanups
1311    checkpoint51i_pre
1312    
1313    o new output for adjoin of global ocean vector invariant
1314    o fix for checkpoint of thermodynamic seaice and bulk_force
1315    o Steph gchem various cleanups
1316    
1317    checkpoint 51h_pre
1318    o fixed some single quotes
1319    o modify gchem pkg to be more versatile
1320    o modifications to clean up dic pkg
1321    o add pkg/cfc
1322    
1323    checkpoint51g_post
1324    o provide links for ARPACK and ADM*TLM
1325    o start removing verification/vero/
1326    o update AD-related stuff
1327      (in particular some IF-statements in model/src/ routines)
1328    o adding to verification/global_ocean.90x40x15/ adjoint of
1329      vector invariant setup
1330    
1331    checkpoint51f_post
1332    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1333    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1334      of tracer Green's fucntions for ocean inversion project.
1335    
1336    checkpoint51f_pre
1337    o Added on-the-fly spatial interpolation capability
1338        "USE_EXF_INTERPOLATION" to pkg/exf.
1339      - This is a temporary Cartesian-grid hack until
1340        the super-duper ESMF coupler becomes available.
1341      - See verification/global_with_exf/README for usage example.
1342      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1343        flags and modified pkg/seaice accordingly.
1344    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1345        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1346        non-local transport term.
1347    
1348    checkpoint51e_post
1349    o pkg/mom_vecinv:
1350      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1351      - add time-ave diagnostic of vorticity advection.
1352    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1353    o atmospheric geopotential: - include water vapor effect;
1354                                - use p^kappa in p* scaling.
1355    o land pkg: read initial state from files.
1356    o AIM : add stratospheric drag in the upper level
1357    
1358    checkpoint51d_post
1359    o change function ILNBLNK (=> last non-blank char.) to return zero
1360      (instead of the string length) when the string. char is empty
1361    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1362    o modif's to restore TAMC compatibility
1363      - avoid "_d" constructs in PARAMETER declarations
1364      - avoid interrupting lines by comment lines
1365    o Use cluster local disks for purely local I/O
1366      vs. globally visible disks needed for ctrl stuff
1367      (merged from ecco-branch)
1368      - new active_file_loc... and mdsio_..._loc routines
1369      - affected packages: autodiff, ctrl, grdchk, mdsio
1370    
1371    checkpoint51c_post
1372    o introducing integer flag debugLevel
1373      - debLevZero: suppress all output
1374      - debLevA: standard
1375      - debLevB: equivalent to current debugMode=.TRUE.
1376    o introducing pathname variable mdsioLocalDir for mdsio
1377      that can be specified at runtime
1378      (relevant for cluster I/O to local disk)
1379    `
1380    >>>checkpoint51b_post
1381    adjoint of ptracers
1382    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1383    o extended state in checkpoint_lev?, etc.
1384    o alternative ctrl/cost with tr1 or ptracer
1385    o new comlev1_bibj_ptracers
1386    o new ptracers.flow
1387    o made ptracers_forcing same as external_forcing_s
1388    o added verification for adjoint with ptracers
1389      - adm. grdchk fail so far
1390      - tlm. grdchk OK
1391      - checked tapelev/comlev recomputations: OK
1392    <<<checkpoint51b_pre
1393    
1394    checkpoint51a_post
1395    o added code for biogeochemistry package
1396      - new pkgs: dic, gchem
1397      - new subroutine in ptracers
1398    o modify code for biogeo packages
1399      - in model/src and pkg/ptracers
1400    
1401    checkpoint51
1402    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1403      - autodiff, ctrl, exf, grdchk, seaice
1404      kept separate packages
1405      - cost, ecco, obcs
1406    o updating verification/internal_wave, verification/lab_sea
1407      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1408    
1409    checkpoint50i_post
1410    o Preparing next differentiable checkpoint and sync
1411      of MAIN vs. ecco-branch
1412      - 1st step: this one is differentiable
1413      - 2nd step: next(! not this) checkpoint will have updated packages
1414                  from ecco-branch)
1415    
1416    checkpoint50h_post
1417    o new package "land": provide surface BC for AIM.
1418    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1419    o AIM: use true log-P extrapolation for near surface temp (= as in
1420        F.Molteni paper) ; update aim.5l_cs output.
1421    o New variable in PARM03 for more flexible pickups
1422    o somewhat cleaned package initialisation sequence for
1423      ctrl/ cost/ ecco/ in packages_... routines
1424    
1425    checkpoint50g_post
1426    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1427      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1428      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1429        made the default because of faster convergence than ADI
1430    
1431    checkpoint50f_post
1432    o exf totally restructured
1433      - replaced all exf_set_ routines by one generic exf_set_gen.F
1434        and made sure it's still differentiable
1435      - split exf_getffields.F into new exf_bulkformulae.F
1436      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1437      - updated adjoint/makefile and relevant verif. accordingly
1438    
1439    checkpoint50f_pre
1440     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1441          + change Evap over land. (update aim.5l_cs output)
1442     o added missing .cvsignores and made uniform across expts
1443     o changed configuration of tidal_basin_2d expt
1444     o added pkg/debug functions for tracing code in fatal crashes
1445     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1446     o new fn in pkg/monitor to stop model if solution grows too big
1447     o removed lots of single quotes from comments
1448    
1449    checkpoint50e_post
1450    o make KPP work with PTRACERS
1451     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1452       nearly a copy of kpp_transport_s
1453     - there is no analogue to SurfaceTendencyS, so I have to use
1454       gPtr(of the surface layer) instead
1455    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1456    checkpoint50e_pre
1457    
1458    checkpoint50d_post
1459    o change kpp output from multiple-record state files to single-record state
1460      files analogous to write_state.F
1461    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1462      analogous to the cg2d-related output.
1463    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1464      so that writing to internal file fn (with length 512) fails.
1465    checkpoint50d_pre
1466    
1467    checkpoint50c_post
1468    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1469    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1470    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1471    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1472    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1473    
1474    checkpoint50c_pre
1475    Merging from release1_p13:
1476    o bug fix for pkg/seaice dynamic solver
1477    o Added SEAICE_initialHEFF to pkg/seaice
1478    
1479    checkpoint50b_post
1480    o store u*,v* in gU,V instead of in guNm1,gvNm1
1481    o in order to put the momForcing out of the Adams-Bashforth:
1482      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1483      to timestep.F
1484    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1485    o re-generate output for highly sensitive test-exp:
1486       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1487    
1488    checkpoint50b_pre
1489    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1490    o corrected CPP option mismatch in exf_Bulk... functions for case
1491      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1492    
1493    checkpoint50a_post
1494    o Bug fix for merging between c50 and KPP.
1495      ikey was passed from thermodynamics to kpp_calc via
1496      common block rather than being recomputed in kpp_calc,
1497      in contradiction with new key itdkey.
1498      New key ikppkey created, and tamc.h headers updated.
1499    
1500    checkpoint50
1501    - 2nd step of merge with ecco-branch:
1502      merge changes in ecco-branch back into main trunk
1503    - bug fix in find_alpha
1504    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1505    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1506    - merged some sliced AD support routines
1507    
1508    checkpoint49
1509    merged from ecco-branch:
1510    o exf:
1511      - Enable initialisation of forcing fields to constant
1512        (runtime) values.
1513      - in exf_getffields.F
1514        Reduce i-/j-loop to interior domain, discarding overlaps.
1515        That also fixes wrong TAF-key computations for key_1, key_2
1516        with bulf formulae.
1517      - exf_init.F modify #ifdef for exf_init_evap
1518      - exf_getffieldrec.F, ctrl_getrec.F
1519        The following INT-usages are not safe:
1520          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1521          fldcount = int(fldsecs/fldperiod) + 1
1522        and were modified.
1523    o autodiff: checkpoint_lev...
1524      - updated storing for bulk formulae (some arrays were missing)
1525      - added state for seaice package
1526      - synchronized with main branch
1527    o DIVA:
1528      Modif.s in
1529      - the_main_loop.F
1530      - the_model_main.F
1531      and added cost_final_restore.F cost_final_store.F
1532      o With these changes, it is possible to fully separate
1533        the first forward run to compute the cost function (mdthe_main_loop)
1534        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1535        into separate model executions.
1536        This enables better tuning of DIVA to given queue sizes.
1537      o Loss of cost function value in consecutive DIVA runs is
1538        fixed by storing to 'costfinal' file.
1539      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1540        beginning/end of adjoint integration is accounted for.
1541      The current changes apply to TAF-1.4.26.
1542      TAF has one remaining bug, requiring one manual change
1543      (see MITgcm manual).
1544    o cal: synchronized between MAIN and ecco-branch
1545    
1546    checkpoint48i_post
1547    o Changes to restore differentiability of code w.r.t. previous tag
1548      (mostly adding new routines to make list and replacing
1549      pressure by totPhiHyd).
1550    o Updated and merged grdchk package
1551      - has both ADM and TLM checks
1552      - works for single- and multi-proc.
1553      - output cleaned
1554      - worked successfully for parallel DIVA
1555    o genmake:
1556      - Adding -platform=SP4
1557      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1558    o Modif. for DIVA:
1559      ctrl_unpack should not be called in intermediate DIVA interval.
1560      (similar thing would apply for active files such as
1561      tbar, sbar, psbar, which should not be reinitialised;
1562      only relevant for ecco-branch)
1563    
1564    checkpoint48h_post
1565    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1566    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1567    o Added SEAICE_initialHEFF to pkg/seaice
1568    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1569    
1570    checkpoint48g_post
1571    --- EOS:
1572    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1573      store total Potential in totPhyHyd for diagnostics & EOS.
1574    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1575    --- Pressure/geopotential gradient:
1576    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1577    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1578      ( changes results of global_ocean_pressure )
1579    o NLFS + z-coord.: add eta*Rho' contribution.
1580    o accurate phiHyd when using interface-W at the middle between 2 centers
1581     ( changes results of ideal_2D_oce )
1582    o includes r* 2nd term in potential gradient.
1583    
1584    checkpoint48f_post
1585    Merging from release1_p12:
1586    o Modifications for using pkg/exf with pkg/seaice
1587      - improved description of the various forcing configurations
1588      - added basic radiation bulk formulae to pkg/exf
1589      - units/sign fix for evap computation in exf_getffields.F
1590      - updated verification/global_with_exf/results/output.txt
1591    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1592      (SBO) core products, including oceanic mass, center-of-mass,
1593      angular, and bottom pressure (see pkg/sbo/README.sbo).
1594    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1595      to avoid negative values in shallow regions.
1596      - updated verification/natl_box/results/output.txt
1597      - updated verification/lab_sea/results/output.txt
1598    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1599    o Added useSingleCpuIO option (see PARAMS.h).
1600    o Updated useSingleCpuIO option in mdsio_writefield.F to
1601      work with multi-field files, e.g., for single-file pickup.
1602    o pkg/seaice:
1603      - bug fix in growth.F: QNET for no shortwave case
1604      - added HeffFile for specifying initial sea-ice thickness
1605      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1606    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1607      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1608    o pkg/seaice:
1609      - adjoint-friendly modifications
1610      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1611    
1612    checkpoint48e_post
1613    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1614    o dynamics: change definition of computational domain & adapt mom_fluxform
1615      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1616    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1617        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1618        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1619        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1620        inverted_barometer solid-body.cs-32x32x1
1621      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1622    
1623    checkpoint48d_post
1624    o in preparation for r*:
1625     a) use pre-computed gradient of hydrostatic potential:
1626        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1627     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1628        => affects results of glob_oce_pressure (different truncation error)  
1629      update output.txt of ideal_2D_oce & global_ocean_pressure
1630    
1631    checkpoint48d_pre
1632    o in preparation for r*:
1633      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1634      pass the 2 comp. of the grad. as arguments to momentum S/R.
1635      but for the moment, only used if it does not change the results.
1636    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1637    
1638    checkpoint48c_post
1639    Modifications in treatment of initial flux forcing controls
1640    to avoid extra storing of flux fields.
1641    
1642    checkpoint48c_pre
1643    o Added tidal_basin_2d experiment (currently 1D!)
1644    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1645    
1646    checkpoint48b_post
1647    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1648     (modification to pressure gradient not yet implemented)
1649    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1650      (for U & V) that are used for vertical advection of momentum.
1651    
1652    checkpoint48a_post
1653    o In preparation for r*, use temp. array to compute vertical transport
1654       in flux-form momentum pkg. => change results of few test-exp.
1655      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1656                        lab_sea, natl_box & plume_on_slope
1657    
1658    checkpoint48
1659    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1660    
1661    checkpoint47j_post
1662    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1663    o moved adexch from forward_step to addummy_in_stepping
1664    o added exch in ctrl_map_...
1665    o aveFreq.=0. at end of cost_final to avoid overwrite in
1666      reverse checkpointing loop
1667    o Yet more changes in gmredi:
1668      * adgmredi_calc_tensor
1669        avoiding all recomputation of gmredi_slope_limit
1670      * adgmredi_x/y/rtransport
1671        added flag for excessive storing to avoid recomp. of
1672        u/v/rtans, dTdx/y/z
1673        -> this is not really necessary and very memory-consuming
1674      * adgmredi_slope_psi:
1675        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1676      * gmredi_slope_limit
1677        re-activated full calculation of taperfct for case 'ac02'
1678    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1679    
1680    checkpoint47i_post
1681    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1682    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1683      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1684    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1685    o gmredi: fix few bugs.
1686    
1687    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1688    This will be a good checkpoint to plug into the ecco-branch.
1689    o few modif.'s to get latest version adjointed
1690      (mainly kick out code in ini_linear_phisurf)
1691    o modif's to run adjoint with exactConserv
1692    o case GM_BOLUS_ADVEC should be cleaned
1693      S/R gmredi_slope_psi should be cleaned
1694    o verification/carbon now has exactConserv=.TRUE.
1695    
1696    checkpoint47g_post
1697    o time-average AIM output: becomes independent from statvars time-average
1698      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1699    o After TAF bug fix:
1700      Tested adjoint of gmredi package.
1701      Tests were done with checkpoint47 rather than with latest
1702      checkpoint47f_post since the latter is broken for the adjoint
1703      verification/carbon/ contains both ADM and TLM gradient checks.
1704    Here they are, before they get changed/lost/stolen.
1705    Mostly modif.'s to fix numerical sensitivities.
1706    Gradient checks OK for
1707    - GM_taper_scheme:
1708      * clipping
1709      * ac02
1710      * linear
1711      * glw91
1712      * dm95
1713      * ldd97
1714    - GMREDI_OPTIONS:
1715      * GM_VISBECK_VARIABLE_K
1716      * GM_NON_UNITY_DIAGONAL
1717      * GM_EXTRA_DIAGONAL
1718      * GM_BOLUS_ADVEC
1719    in conjunction with data.gmredi parameters to be checked in
1720    in a few minutes under verification/carbon/code/
1721    
1722    checkpoint47f_post
1723    Merging from release1_p10:
1724    o modifications for using pkg/exf with pkg/seaice
1725      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1726        and SEAICE_EXTERNAL_FLUXES
1727      - pkg/exf CPP options EXF_READ_EVAP and
1728        EXF_NO_BULK_COMPUTATIONS
1729      - usage examples are Experiments 8 and 9 in
1730        verification/lab_sea/README
1731      - verification/lab_sea default experiment now uses
1732        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1733    
1734    checkpoint47e_post
1735    o created a tag prior to creating a branch
1736    
1737    checkpoint47d_post
1738    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1739      at the bottom boundary had an erroneous half slip boundary condition
1740    o added bottom drag and no slip boundary condition capabilities to
1741      oceanic pressure coordinates code
1742    o added new verification experiment global_ocean_pressure, this experiment is
1743      also described in the tutorial section of the manual
1744    checkpoint47d_pre
1745    
1746    checkpoint47c_post
1747    o Added a verification experiment for a global cubed-sphere ocean run
1748      -  verification/global_ocean.cubed32x32x30
1749      -  uses pkg/therm_seaice and pkg/bulk_forcing
1750    
1751    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1752    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1753      when using P-coordinate; only implemented for atmospheric config.
1754    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1755      NOTES: requires option NONLIN_FRSURF to be "#define".
1756    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1757    
1758    checkpoint47b_post
1759    Merging from release1_p9:
1760    o pkg/seaice
1761      - removed GOTO's and added taf directives
1762      - double precision constants to reduce the g77 (Linux)
1763        to F77 (SGI) differences reported in release1_p8
1764    o tools/genmake
1765      - added SGI options
1766    o verification/testscript
1767      - updated to that of checkpoint47a_post
1768    o verification/global_ocean.90x40x15/input/eedata
1769      - modified for SGI f77 compatibility
1770    o verification/lab_sea
1771      - added description of sea-ice model
1772      - added missing matlab routines
1773      - added test of thermodynamics parallelization
1774    
1775    checkpoint47a_post
1776    o new pkg: aim_v23
1777     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1778       for now, keep the same surface forcing as before.
1779     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1780     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1781     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1782    o add diagnostic of surface correction term in monitor output
1783    
1784    o bulk_force and therm_seaice
1785    - Two packages:  bulk_force (Bulk forcing)
1786      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1787    - Earlier integration from Stephaine Dutkiewicz
1788      and Patrick Heimbach.
1789    - Two ifdef statements for compile time,
1790       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1791    
1792    checkpoint47
1793    differentiable version of checkpoint46n_post
1794    o bug fix in quasihydrostaticterms
1795    o * "clean" adjoint code (in terms of extensive recomputations)
1796        can now be obtained for all GMREDI options (i.e. for
1797        - GM_VISBECK_VARIABLE_K
1798        - GM_NON_UNITY_DIAGONAL
1799        - GM_EXTRA_DIAGONAL
1800        - GM_BOLUS_ADVEC )
1801      * However, wrong gradient check problem remains unsolved.
1802      * New CPP options have been introduced for different
1803        tapering schemes
1804    o external_fields_load now part of differentiation list
1805    o pressure needs multiple storing;
1806      would be nice to have store_pressure at beginning or
1807      end of forward_step, e.g. by having phiHyd global (5-dim.)
1808      (NB: pressure is needed for certain cases in find_rho,
1809      which is also invoked through convective_adjustment).
1810    o recomputations in find_rho for cases
1811     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1812    o #define ATMOSPHERIC_LOADING should be differentiable
1813    o ini_forcing shifted to begining of initialise_varia
1814    o Incorporating QNVS line search routines into MITgcm
1815      (this is separate code, and therefore not under pkg)
1816      lsopt/, optim/
1817    o Updated verification/carbon/
1818      - #define GM_VISBECK_VARIABLE_K
1819      - GM_taper_scheme    = 'ldd97'    
1820    
1821    checkpoint46n_post
1822    Merging from release1_p8:
1823    o verification/natl_box:
1824      updating new external_fields_load routine
1825    o New package: pkg/seaice
1826      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1827      The sea-ice code is based on Hibler (1979-1980).
1828      Two sea-ice dynamic solvers, ADI and LSR, are included.
1829      In addition to computing prognostic sea-ice variables and diagnosing
1830      the forcing/external data fields that drive the ocean model,
1831      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1832      The implied surface heat flux is then stored in variable
1833      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1834      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1835      non-local transport term.  Because this call precedes model
1836      thermodynamics, temperature under sea-ice may not be "exactly" at
1837      the freezing point by the time theta is dumped or time-averaged.
1838      N.B.: fairly large differences in accuracy occur across
1839            different platforms/compilers; comparison between
1840            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1841            generated output gives:
1842       T           S           U           V
1843      C D M    c        m  s        m  s        m  s        m  s
1844      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1845      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1846      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1847    
1848      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1849    o GAD:
1850      - generated new common blocks to account for call of
1851        same gad routines with differing traceridentities
1852        (needed to modify tracerIdentity indices in GAD.h)
1853      - generated separate common blocks for case useCubedSphereExchange
1854        (Department of Futurology)
1855      - parameter lists to gmredi_?transport: added tracerIdentity
1856      - added new key indices to tamc.h
1857    o external_fields_load:
1858      - added this routine to TAF list
1859      - needed to make some common blocks global and additional storing
1860        along the same lines as exf package (checkpoint_lev?_directives.h)
1861    o exf:
1862      updated external forcing package
1863      - bug fixes carried over from ecco-branch
1864        (missing OBCS_OPTIONS.h in two routines)
1865      - enable easy to use "no forcing".
1866      - added exf I/O for atmospheric loading
1867      - added exf I/O for runoff data
1868      - transfered scaling between exf <-> MITgcm to exf namelist
1869    o Adding new verification experiment global_with_exf.
1870      This verification experiment is almost identical to the
1871      global_ocean.90x40x15 experiment, except that it uses
1872      the exf (and cal) package instead of the
1873      external_fields_load routine (cf README file).
1874    
1875    checkpoint46m_post
1876    o modified testscript to return -- when there are no lines of "%MON" output
1877    o added new flag "quasiHydrostatic" for QH mode
1878      and new routine quasihydrostaticterms()
1879    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1880      New routine: mom_u_coriolis_nh()
1881    o fixed sign of non-hydrostatic metric terms in u and v equations.
1882      Depend on correct sign of gravitySign.
1883    o added work.pc* to .cvsignore in aim directories using ifc
1884    o introduced flag for controllin non-hydrostatic metric terms
1885    o removed gravitySign from PARM04
1886    o switched to g77/ifc from pgf77 in aim experiments
1887    
1888    checkpoint46l_post
1889    o made convective adjustment work with pressure coordinates:
1890     - changed the direction of k-loop in convective_adjustment.F for the
1891       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1892     - adjusted the reference pressure k-index in convective_adjustment.F
1893     - adjusted the convection condition in convect.F (in analogy to
1894       calc_ivdc.F)
1895     - convective_adjustment no longer computes anything on the halos
1896     - removed the warnings about negative salinity from find_rho.F and
1897       find_alpha.F; instead the new routine look_for_neg_salinity, called
1898       at the beginning of find_rho, find_alpha, and find_beta, does a
1899       check of the entire slice, if CPP-option
1900       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1901    checkpoint46l_pre
1902    
1903    checkpoint46k_post
1904    o fixed the verification/global_ocean.90x40x15 experiment:
1905     - new bathymetry (the world according to A., JMC, and M.)
1906     - new initial fields and forcing fields (*.bin files)
1907     - new POLY3.COEFFS (for the next release one should switch to a full
1908       equation of state: JMD95P or MDJWF)
1909     - fixed several errors and redundancies in the data file
1910     - experiment uses looped cells
1911     - added matlab directory with diagnostic scripts for plotting of output
1912    
1913    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1914     - read AIM physics parameters from a file (data.aimphys)
1915     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1916    
1917    checkpoint46j_post
1918    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1919    o move wVel computation at the end of the time step, in S/R integr_continuity
1920    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1921    o update timeave pkg for wVel diagnostic.
1922    checkpoint46j_pre
1923    
1924    checkpoint46i_post
1925    o Clean up AIM package (and keep the results unchanged):
1926      include CPP_OPTION and use IMPLICT NONE in all routines ;
1927      declare all the variables _RL ; use _d 0 for all numerical constants.
1928      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1929    
1930    checkpoint46h_post
1931    o cleaned up the use of rhoNil and rhoConst.
1932      - rhoNil should only appear in the LINEAR equation of state, everywhere
1933        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1934        and the dynamical equations are all divided by rhoConst
1935    o introduced new parameter rhoConstFresh, a reference density of fresh
1936      water, to remove the fresh water flux's dependence on rhoNil. The default
1937      value is 999.8 kg/m^3
1938    o cleanup up external_forcing.F and external_forcing_surf.F
1939      - can now be used by both OCEANIC and OCEANICP
1940    checkpoint46h_pre
1941    
1942     Added code to convert surface volume flux (fresh water) into
1943     a mass flux when using P coordinates in the ocean (OCEANICP).
1944     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1945    
1946    checkpoint46g_post
1947    o Include a new diagnostic variable phiHydLow for the ocean model
1948      - in z-coordinates, it is the bottom pressure anomaly
1949      - in p-coordinates, it is the sea surface elevation
1950      - in both cases, these variable have global drift, reflecting the mass
1951        drift in z-coordinates and the volume drift in p-coordinates
1952      - included time averaging for phiHydLow, be aware of the drift!
1953    o depth-dependent computation of Bo_surf for pressure coordinates
1954      in the ocean (buoyancyRelation='OCEANICP')
1955      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1956        Theta, Salinity, and Pressure in the parameter list. This routine is
1957        presently contained in find_rho.F. This routine does not give the
1958        correct density for 'POLY3', which would be a z-dependent reference
1959        density.
1960    o cleaned up find_rho
1961      - removed obsolete 'eqn' from the parameter list.
1962    o added two new verification experiments: gop and goz
1963      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1964    checkpoint46g_pre
1965    
1966    checkpoint46f_post
1967    o Enable tangent linear (forward mode) gradient checks:
1968      - extended active file handling to g_... files
1969      - added TANGENT_SIMULATION to theSimulationMode
1970      - extended grdchk package accordingly
1971    o added tangent linear setup in verification/carbon/code_ftl
1972    o added adjoint setup in verification/front_relax/code_ad
1973    
1974    checkpoint46e_post
1975    o Added new equation of state -> MDJWF
1976      - EOS of McDougall et al., 2002, JAOT, submitted
1977      - caveat: the equation of state is only valid for a smaller (more
1978        realistic?) range of values than JMD95P/Z and UNESCO
1979      - added masks to the calculation of pressure in store_pressure
1980      - added more check values for density in check_eos (ini_eos.F), some of
1981        the old check values are out of the range of the MDJWF-eos, so don't
1982        expect perfect matches for those
1983    checkpoint46e_pre
1984    
1985    checkpoint46d_post
1986    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1987      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1988      case of pressure coordinates. eosType='JMD95Z' in
1989      combination with buoyancyRelation='OCEANICP' now causes an error.
1990    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1991      in find_alpha/beta.
1992    checkpoint46d_pre
1993    
1994    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1995      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1996    
1997    checkpoint46c_post
1998    o Changes necessary for ocean in p-coordinates
1999     -  Added new buoyancy relation = 'OCEANICP'
2000     -  Added new parameters = gravitySign (this used to be contained inside
2001        the factor dRdZ which I added when we first switched to R coordinates).
2002     X GM/Redi is not compatible (yet)
2003     X bottom drag and no-slip need to be debugged.
2004    checkpoint46c_pre
2005    
2006    checkpoint46b_post
2007    o Added new equation of state -> JMD95Z and JMD95P
2008      - EOS of Jackett and McDougall, 1995, JAOT
2009      - moved all EOS parameters into EOS.h
2010      - new routines ini_eos.F, store_pressure.F
2011    o Added UNESCO EOS, but not recommended because it requires
2012      in-situ temperature (see JMD95)
2013    o Modified formatting for knudsen2.f in utils/knudsen2 and added
2014      unesco.f to be used with POLY3
2015    checkpoint46b_pre
2016    
2017    checkpoint46a_post
2018    o Added (atmospheric) pressure loading
2019      - new field in FFIELDS.h, etc...
2020      - new cpp flag ATMOSPHERIC_LOADING
2021    o Changed hFacC to _hFacC in calc_phi_hyd.F
2022    o Added SHORTWAVE_HEATING to some files for consistency
2023    checkpoint46a_pre
2024    
2025    checkpoint46
2026    further merges from release1_p5
2027    o new ctrl package
2028      - adopted from ECCO environment to enable optimization
2029      - added Eliassen Palm fluxes to controls
2030    o added Eliassen Palm flux controls to gradient check package
2031    o cost package
2032      - Compatible with new ctrl package
2033      - added Eliassen Palm cost hooks
2034      - modif's of existing cost functions
2035    o Adjoint-related bug fixes in kpp:
2036      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
2037      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
2038    o autodiff package
2039      - flow directives:
2040        + new for S/R do_the_model_io
2041        + enhanced for S/R checkpoint
2042        + new gmredi.flow
2043      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
2044        disable adcommon.h/g_common.h by default.
2045      - fixed problem for adjoint of global_max
2046    o modified verification/carbon/
2047    o New setup for adjoint of global_ocean
2048    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
2049    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
2050    o incorporated hooks for sponge layer code (external_forcing.F)
2051    
2052    checkpoint45d_post
2053    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
2054    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
2055      (affects plume_on_slope "cg2d" output)
2056    o add new parameter deltaTfreesurf for free-surface time stepping
2057    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
2058    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
2059    o change phiMin in exp1 (to agree with documentation)
2060    o add new flags:
2061     - T,S forcing inside/outside Adams-Bashforth
2062     - turn off temp,salt advection and/or forcing
2063     - for each tracer, define internal flag for multiDimAdvection & A-B
2064    o monitor: change definition of KE to check conservation of Energy
2065    
2066    checkpoint45c_post
2067    o Removed f90 comments ("!")
2068    o Modified initialisations to enable exf package for MITgcm
2069      (without invoking ECCO_PACKAGE).
2070    o modifications to gradient check package (Martin Losch)
2071      - enable centered differences
2072      - modified format of standard output
2073    
2074    checkpoint45b_post
2075    o cleaned exchange calls in cg2d
2076    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
2077    o included CPP option SINGLE_LAYER_MODE in thermodynamics
2078      to configure barotropic setup (Martin Losch)
2079    o moved some initialisations within bi,bj loop in dynamics
2080      (TAF flow dependency)
2081    o in initialise_varia, moved call packages_init_variables
2082      before convective_adjustment_init
2083      (corresponding adjustment of TAF tape initialisation).
2084    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
2085    
2086    checkpoint45a_post
2087    o compute Rho over the whole domain (extend iMin,jMin indices)
2088    o specific exchange for X-slice domain (case Ny=1)
2089    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
2090    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
2091    
2092    checkpoint44h_post = checkpoint45
2093    o Fix to restore differentiability:
2094      place at which packages_init_variables is called in
2095      initialise_varia is crucial for reverse control flow.
2096    o modifications in GMRedi to enable stable adjoint
2097      (corresponding modif's in thermodynamics, dynamics)
2098    o added missing hook for sponge layer code in external_forcing
2099    o modified test cost functions
2100    o storing in gad_advection (plus removal of write(0,*)!
2101    o missing headers TR1.h added in convective_adjustment routines
2102    o errorMessageUnit set non-equal zero in eeboot
2103      (conflict on some platforms, e.g. IBM SP3)
2104    o modified carbon verif.
2105    
2106    checkpoint44h_pre
2107    o vertical grid option: allow to put the Interface at the middle between
2108      2 cell-centers ; replace delZ in pkg/kpp by drF.
2109    o GM Advective form: Tracers are advected using the residual transport (=
2110      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
2111    
2112    checkpoint44g_post
2113    o fix surface correction term in multiDimAdvection (affects plume_on_slope
2114      results) ; ifdef missing in thermodynamics.F
2115    
2116    checkpoint44f_pre,checkpoint44f_post
2117    o added PTRACERS package
2118      This allows an arbitrary number of passive tracers to be integrated
2119      forward simultaneously with the dynamicaly model.
2120      + Implemented so far:
2121        - basic forward algorithm (time-stepping, advection, diffusion, convection)
2122        - I/O and checkpointing
2123        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
2124      + Not implemented so far:
2125        - KPP
2126        - OBCS
2127      + No specific example supplied (yet) but global_ocean.90x40x15 has the
2128        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
2129        line in data.pkg.
2130      + This package is disabled by default since it increases storage.
2131    
2132    
2133    o testscript: added -cleanup option
2134    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
2135                 b) enable to filter 2D fields.
2136    
2137    checkpoint44e_pre,post
2138    o re-wrote convective adjustment to use pre-calculated weights
2139      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
2140      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
2141      Original calls to convect() still in place.
2142    
2143    chkpt44d_pre,post
2144    o added missing EXCLUDE_MONITOR flags
2145    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
2146      (incompatible typ in MIN/MAX expressions caused problems
2147      on IBM SP3)
2148    o in genmake added variable MAKEDEPEND
2149      plus resetting for case SunOS
2150    o added timer_stats.c routine for IBM SP3
2151    o removed variables in dynamics
2152    !!! I forgot to create tag chkpt44d_pre !!!
2153    !!! But chkpt44d_pre = chkpt44c_post    !!!
2154    
2155    o real fresh water flux implemented with non-linear free-surface.
2156    
2157    chkpt44c_pre,post
2158    o few fix (mask in shap_s2, EmPmR in external_field_load,
2159      USE_NATURAL_BCS in solve_for_P);
2160    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
2161    
2162    checkpoint44b_pre/_post
2163    o merge of relevant stuff from the ecco-branch:
2164      - genmake: removed $S64 overwrite for case SunOS
2165      - pkg/exf: update and corrections for field swapping and obcs
2166      - pkg/ecco: parameter lists for the_model_main, the_main_loop
2167                  harmonized between ECCO and MITgcm
2168      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
2169                      updated checkpointing_lev... lists for obcs
2170      - model/src: minor changes in forward_step, plot_field
2171                   added directive for divided adjoint in the_main_loop
2172      - pkg/mdsio: added mdsio_gl_slice
2173    
2174    o check parameters & config (chkpt44a_pre,post)
2175    o OBC and NonLin_FrSurf.
2176    
2177    checkpoint44
2178    o fix bug in mom_vi_del2uv
2179    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
2180    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
2181    o update AIM experiments (NCEP input files)
2182    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
2183    o added some stuff for AD
2184    
2185    checkpoint43
2186    o added two new advection tests
2187    o added global 4x4 degree ocean test
2188    o added test of H&S94 with free surface on cube
2189    o some final mods for gradient check, adjoint,...
2190    
2191    checkpoint42
2192      Fixed AD-related problems:
2193    o Store directives up-to-date with re-arranged Adams-Bashforth
2194      (mainly thermodynamics.F)
2195    o New store directives for multi-dim. advection schemes
2196      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
2197      * new common block and key passkey
2198      (mainly gad_advection.F)
2199    o Modified store directives for split of dynamics/thermodynamics
2200      for the case ALLOW_KPP
2201    o Cleaned argument list for timestep_tracer.F
2202    
2203    checkpoint41
2204    o re-formatted/added comments in prologues of key subroutines
2205      to work with protex
2206    
2207    checkpoint40
2208    o moved calc_gs, calc_gt and calc_tr1 back to model/src
2209    o added FLT (floats) package from Arne along with demo. experiment
2210    o re-arranged Adams-Bashforth scheme for tracers to allow easier
2211      implementation of forward-in-time forcing terms
2212    o more mods for non-linear free-surface including new variable
2213    o modified multi-dim method to work on cube
2214    o bug fix in KPP (from DM)
2215    
2216    checkpoint40pre9
2217    o added DST advection schemes
2218    o fix MPI bug on SGI's
2219    o modifications for non-linear free-surface
2220    o fixed conditionals for fixed flow/passive tracer only mode
2221    o added tension/strain form of stress tensor
2222    o changes to commenting of arguments for TAF/TAMC
2223    o added/updated many matlab scripts
2224    o added multi-dimensional advection method for tracers
2225      
2226    checkpoint40pre8
2227    o new package rw/
2228      Added method for dumping intermediate local arrays:
2229      mdsio_writetile - same as mdsio_writefield except works from inside
2230                        bi,bj loop
2231      mdsio_writelocal - same as mdsio_writetile except works for local
2232                         arrays
2233      write_local_r? - higher-level wrapper for mdsio_writelocal
2234      Controlled by diagFreq. Defaults to zero (ie. no dumps)
2235      Example given at end of mom_vecinv.F that dumps some local arrays.
2236    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
2237      control flux-form versus vector invariant code.
2238      Switch is runtime flag vectorInvariantMomentum (defaults to false)
2239      or genmake -DISABLE ...
2240    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
2241      (additional storing is now needed for case vecinv;
2242      currently nothing implemented to switch this storing off
2243      in case fluxform is used since no CPP flag available).
2244    
2245    checkpoint40pre7
2246    o bug fix in dynamics.F
2247      calc_viscosity called before k=1,Nr loop.
2248    o added some #ifdef's ALLOW_PASSIVE_TRACER
2249    o cleaned initialisations in ctrl_map_ini
2250      related to TAF
2251    
2252    checkpoint40pre6
2253    o split dynamics into thermodynamics & dynamics
2254    o corresponding split of calc_diffusivity into
2255      calc_diffusivity, calc_viscosity
2256      (kpp_calc_diff, kpp_calc_visc).
2257    o Added diffkr, kapgm to control variables
2258    o bug fix in gmredi_slope_limit for ldd97
2259    
2260    checkpoint40pre5
2261    o proper initialization of Adams-Bashforth time stepping
2262      + uses forward step for very first step of model (iter=0)
2263    o re-generated *all* output since almost all output is modified by this
2264      change (sorry but we've been putting this one off for about 2 years)
2265      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
2266        *not* regenerated since they are already out of date and I don't
2267        want to create the impression that they are suddenly working.
2268    o removed KAP stuff for DEC's
2269    o modified/added many .cvsignore files in */code and */input
2270    o added new expt "solid-body.cs-32x32x1"
2271      + this uses an alternative form of ini_curvilinear_grid.F which
2272        is not necessarily any better than the current one...
2273    
2274    checkpoint40pre4
2275    o added re-initialisations of utrans,vtrans,rtrans in
2276      calc_common_factors which are crucial for TAF.
2277    o extended iMin,jMin range for calc_common_factors,
2278      calc_diffusivity
2279    o added option ALLOW_PASSIVE_TRACER
2280    o a few minor updates and fixes
2281    
2282    checkpoint40pre3
2283    o created calc_gtr1.F for gad package
2284    o split the_main_loop and re-introduced forward_step
2285    o some recomputations of nIter0 for TAMC
2286    
2287    checkpoint40pre2
2288    o Updated to latest branch of AJA, JMC
2289    o Added gradient check package
2290    o Added routines for passive tracer handling
2291    o Added carbon sequestration sensitivity experiment
2292    
2293    checkpoint39
2294     o Modifications and fixes to support TAMC
2295       (mainly missing or wrong directives)
2296     o Corrected common blocks when fooling TAMC to produce adjoint I/O
2297       in addummy_in_stepping
2298     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
2299     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
2300     o Included following packages:
2301       cal: calendar
2302       exf: external forcing
2303       ecco: essential routines to control use of cal, exf
2304             (NB: this is not the full ECCO environment)
2305     o disabled some packages by default in genmake
2306    
2307    checkpoint38
2308     o see notes_c37_adj.txt
2309     o corrected wrong layer index in external_forcing_t
2310     o replaced the_main_loop/forward_step by the_main_loop
2311     o removed forceoutput from write_state
2312       (replaced criteria for initial/final state)
2313     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
2314    
2315    checkpoint37
2316     o mdsio.F routine split and packaged in pkg/mdsio
2317       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
2318        used unless genmake -disable=mdsio)
2319     o allow a more precise surface-geopotential gradient for the atmosphere
2320       taking into account the change in space of Alpha (=1/rho) at the surface.
2321     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
2322       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
2323     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
2324       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
2325       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
2326     o Time-Average diagnostics defined as a pseudo package "timeave".
2327     o pickup files : old pickup (before c35) did not work with new code (c35
2328       and after) unless activating 2 commented lines in initialise-varia.
2329     o Non-Hydrostatic pickup file Pb fixed.
2330     o bug with Rigid-lid version (since c35) fixed.  
2331    
2332    checkpoint36
2333     o implement Crank-Nickelson barotropic time-stepping
2334     o recover Time-Average diagnostics
2335     o fix Pb in checkpoint (PR#19)
2336     o AIM become a standard package ; clean unused CPP_kees
2337    
2338    checkpoint35
2339     o subtantial rewrite of dynamics.f
2340     o allows staggered time-stepping
2341     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
2342     o added bottom drag (linear + quadratic)
2343    
2344    checkpoint34
2345     o Modified exchange routines for correct reverse simulation.
2346     o Added verification output to comply with bug fix in impldiff.F
2347       as of c33 (exp2, natl_box).
2348     o Corrected store directives in dynamics.F
2349     o Corrected array boundaries in impldiff.F
2350     o Corrected array dimensions in gmredi.
2351       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
2352     o Added routine GLOBAL_SUM_INT to global_sum.F
2353     o Added mdsio_gl.F for ECCO purposes.
2354    
2355    checkpoint33
2356     o Fixed bug in lower BC in impldiff.F
2357     o Fixed confusion about units of forcing arrays in FFIELDS.h
2358       namely Fu,Fv,Qnet,Qsw,EmPmR:
2359       - Removed verification/natl_box/code/external_fields_scale.F
2360         (did not differ from that in model/src)
2361       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
2362         (see FFIELDS.h for description)
2363       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
2364         kpp_calc.F and kpp_transport_t.F
2365       - Removed model/src/external_fields_scale.F and calls to it
2366       - verification/natl_box uses flux data with "atmospheric" sign so
2367         a special version of external_fields_load.F is used to
2368         change the data as it's read in. This way, the arrays
2369         have the right units and signs at all times tha a user could
2370         possibly use them.
2371     o Corrected genmake to delete a temporary file during configuration
2372    
2373    checkpoint32
2374     o Scaling of forcing fields moved from external_forcing.F to
2375       external_fields_scale.F, called directly after loading fields.
2376     o Surface relaxation terms added to surface tendency fields in
2377       extra subroutine.
2378     o impldiff.F changed to avoid storing by TAMC of huge intermediate
2379       fields.
2380     o Changes in GMRedi to comply with packaging structure.
2381     o Modifications and bug fixes in KPP package.
2382     o Verification experiment for KPP added (verification/nat_box/)
2383    
2384    checkpoint31
2385     o Packages interface brought in line with defined standard
2386       -> new routines packages_...F
2387       -> changes in initialise_fixed.F, initialise_varia.F
2388       -> enables initialisation interface for ECCO package
2389     o Rescaling of external forcing fields immediately after read
2390       (removed from external_forcing.F)
2391       -> new: surface_fields_scale.F
2392       -> affects ini_foorcing.F, external_fields_load.F
2393     o Computation of surface tendencies before tendency updates.
2394       -> new: external_forcing_surf.F
2395     o Change of variable names useGMRedi, useKPP, useECCO
2396     o Further changes in dynamics.F, impldiff.F for TAMC
2397     o Tested for experiments 0, 2, 4.
2398       - not yet tested for GMRedi.
2399       - not yet tested for KPP.
2400    
2401    checkpoint30
2402     o Updates for OBCs
2403     o New experiment for test OBCs (internal_wave)
2404     o New output.txt in verification/exp4/results/
2405     o Updates for KPP: calculation of viscosity corrected, new variables
2406       kpp_dumpFreq and kpp_taveFreq
2407     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
2408       and entry for T90 in genmake
2409    
2410    checkpoint29
2411     o packaged KPP and GM/Redi
2412    
2413    checkpoint28
2414     o Corrected initialization of hFacMin for difference vertical coordinates
2415     o Modified calculation of partial cell thickness to more robust algorithm
2416     o config_summary.F: replaced write_1D_... by write_0D_...
2417       read_write.F: added subroutines write_0D_...
2418     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
2419       included some initialisations required for TAMC.
2420     o routine calc_isoslopes: modified sqrt computation to make it
2421       differentiable for zero argument.
2422     o routines dynamics, impldiff:
2423       included store directives and tape key computations required for TAMC.
2424     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
2425    
2426    checkpoint27
2427     o fixed calc_isoslopes() to so that cancellation of terms in tensor
2428       formulation works properly with variable resolution.
2429     o restructured the calling tree between the_model_main() and dynamics()
2430     o split initialise() into initialise_fixed() and initialise_varia()
2431     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
2432       in new routine ini_psurf()
2433    
2434    checkpoint26
2435     o moved some #ifdef in optional routines to encompass everything
2436       except the argument declarations. This was using up some memory.
2437     o fixed macros like _ADT to work with both versions of Linux cpp
2438     o cleaned up some unused and uninitialized variables
2439       (helps when debugging with strict compile options)
2440     o split up CPP_EEOPTIONS.h into options and macros
2441       (macros are now in eesupp/inc/CPP_EEMACROS.h)
2442     o patch for 2 processor JAM mode
2443    
2444    checkpoint25
2445     o updates for OBCs and NH
2446     o dramatically reduced memory usage
2447     o added "JAM" routines for use on Artic network
2448     o parameterization of convection by implicit vertical diffusion
2449     o added a diagnostic of convective index
2450     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
2451       (this is was partly for OBCs and NH but also in anticipation of
2452        an explicit free-surface option)
2453     o initial state input files for U and V
2454    
2455    checkpoint24
2456     o Removed some spurious "REAL"s
2457     o Updated KPP to latest version from JPL
2458     o Added a COS(latitude) in horizontal viscosity
2459    
2460    checkpoint23
2461     o Added del^4 diffusion for salt and temperature
2462     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
2463    
2464    checkpoint22
2465     o Made many small changes: implicit none, format(i5), etc...
2466     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
2467    
2468    checkpoint21
2469     o Introduced new I/O package that supports direct-access records (mdsio.F)
2470     o Split-up mid-level I/O routines
2471     o Updated input data for experiments 0,1,2,4 and 5
2472     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
2473    
2474    checkpoint20
2475     o Tidied up open-boundaries some more
2476     o Added non-hydrostatic code
2477     o Fixed some input data
2478     o Modified MPI start-up to work in "coupled" context.
2479    
2480    checkpoint19
2481     o Tidied up directory structure for verification experiments.
2482     o Added new code for open boundaries.
2483     o Corrected advective terms near boundaries.
2484     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
2485     o Implemented free-slip/no-slip BCs and del^4 dissipation.
2486     o Split default parameters out of ini_parms.F into set_defaults.F.
2487    
2488    checkpoint18
2489     o Further changes for optional code generation with
2490       CPP - ugh!
2491    
2492    checkpoint17
2493     o Beginning to incorporating modularity
2494       for supporting atmos. and ocean configs.
2495     o Small changes for TAMC complinace
2496     o New ultra simple test case. Barotropic box
2497       configuration "exp0".
2498    
2499    checkpoint16
2500     o Minor changes to exchange routines to support
2501       accumulation in reverse mode. Adjoint of an
2502       assignment is an addition.
2503     o Changes to support compilation by TAMC (LR(1)
2504       syntax) and by g77 under Linux ( 72 character
2505       limit ).
2506    
2507    checkpoint15
2508     Rewrote exchange routines to allow
2509     o General tile <-> tile connectivity.
2510     o TAMC reverse mode flag ( is this really needed? )
2511     o Variable width overlap and exchange region widths.
2512     o Hooks for sharing data via DMA, Arctic, Memory Channel,
2513       shmput/shmget, VIA, SYSV shmem and every other cool
2514       communication method.
2515    
2516    checkpoint14
2517     Consistent isomorphism chages made. These allow dynamical core
2518     to support both pressure and meters as a vertical coordinate.
2519    
2520    checkpoint13
2521     Release which corrects global_max problem and a couple
2522     of KGM time-averaging diagnostic errors. Also contains
2523     a double-gyre experiment setup as well as the baseline
2524     4 degree global template. The double gyre template is
2525     organised to allow it to be applied automatically to
2526     the baseline configuration.
2527    
2528    branch-point-rdot
2529     A few tidy-ups have been made bt the real point of this
2530     check-point (excuse the pun) is to allow a branch to be
2531     made for the purposes of adding the rDot alterations.
2532     I don't want to commit the rDot to the main-trunk until
2533     we've actually tested it...
2534    
2535    checkpoint12
2536     Tidy up and added generic genmake script (formerly
2537     configure script).
2538     Released to testers.
2539    
2540    checkpoint11
2541     Re-arranged initialise() and introduced ini_vertical_grid()
2542     and ini_masks_etc().
2543    
2544  checkpoint10  checkpoint10
2545   Introduced the configure script.   Introduced the configure script.
2546   Separated out the diags package.   Separated out the diags package.

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