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revision 1.38 by heimbach, Tue Apr 10 22:35:24 2001 UTC revision 1.909 by jmc, Tue Nov 13 22:20:29 2007 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o lab_sea.hb87: modify the domain & update output.hb87.txt :
8      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
9      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
10      process. Fixed here by closing the domain at the Northern boundary.
11    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
12    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
13      a set of consecutive levels in/from a 3-D array.
14    o pkg/ptracers:
15      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
16      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
17    
18    checkpoint59j
19    o in pkgs: dic, obcs, offline, rbcs:
20      standard way to compute coeff. for time interpolation between 2 time reccords
21      which retains full precision (& make results less dependent on compiler).
22      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
23    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
24      packages instead of reading ice cover and wind speed separately
25    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
26     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
27      to allow to compile customized code before the update)
28    o cleaning-up:
29      - fix CPP instruction syntax in pkg/obcs
30      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
31        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
32      - fix some threads issue in IO parts.
33    o pkg/dic:
34      - add tons of "_d 0" (--> much better testreports !)
35       and then update outputs of tutorial_global_oce_biogeo
36    o pkg/mom_fluxform:
37      add a special version of momentum advection intended to conserve momentum
38      next to a bathymetry step or a coastline edge. (default = off = #undef)
39    o new read/write pickup version:
40      - for now, only implemented for main (mdsio) pickup file.
41      - write out only what is needed to restart; merge pickup_nh , pickup_ph
42        and main pickup together.
43      - read meta file; read only what is needed to restart; stop if a field
44        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
45        if it make sense (even if the restart is not perfect).
46      - if no meta file, assume that pickup to read corresponds exactly to
47        a pickup that would currently be written.
48      - read pickup written in the old format (until checkpoint59i) if it
49        recognizes an old meta file (no field-list).
50      - add a meta file in exp. which starts from a pickup: 2 cases:
51        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
52         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
53        b) a meta file describing the content of the associated pickup file
54         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
55    o pkg/mdsio & pkg/rw:
56      - new routine to read a meta file ; new set of routine to read
57        Multiple-fields file (with meta file).
58    o added open boundary conditions capability for seaice
59        HSNOW, HSALT, UICE, and VICE
60    
61    checkpoint59i
62    o adjoint:
63      * fix multiDimAdvection adjoint
64        (partial recomputation problem by TAF for fVerT(:,:,kDown)
65        and comlev1 size definition (maxpass vs. max. number of tracers)
66      * verification/global_ocean.90x45x15 adjoint now tests
67        NLFS and multiDimAdvection using DST3 (=30)
68      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
69    o pkg/kpp: add "_d 0" to real constant (if missing);
70      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
71      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
72    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
73      for internal parameters related to restart process (formerly from PARAMS.h)
74      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
75    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
76      as argument. (only atm2d & obcs write_pickup have not yet been updated)
77    o pkg/monitor:
78      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
79      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
80      - account for deep Atmosphere factor and density factor (anelastic)
81    o added open boundary conditions capability for seaice HEFF and AREA
82    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
83      thermodynamics
84      - requires a little reorganization, which affects the testreport results
85        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
86        so that now the conservative form is tested
87      - add a few comments
88    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
89    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
90    o add new diagnostics to seaice: advective, diffusive fluxes (only for
91      multidim-advection, for scheme 2 they are not filled) and transports,
92      thermodynamic growth rates
93    o change units of EmPmR (inside the code, + within coupling interface)
94      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
95      Affects results @ truncation level (cg2d match) and update output of
96       experiments: lab_sea(6), global_ocean.90x40x15(10),
97      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
98      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
99      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
100      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
101    
102    checkpoint59h
103    o pkg/exf:
104      - improve vectorization by moving if-statement out of loops in
105        exf_mapfields, exf_radiation
106      - exf_bulkformulae.F: introduce 2D fields and vectorize code
107    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
108    o testreport:
109      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
110        monitor & update offline_exf_seaice exp. output.
111      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
112    o pkg/seaice:
113      - bug fix in the evp solver: boundary conditions were affected be
114        masking of zMax/zMin (changes results)
115      - minor bug fix in boundary conditions in seaice_calc_strainrates
116        (changes results for no_slip)
117      - seaice_lsr.F: make interpolation of eta dependent on boundaries
118      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
119      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
120        stress formulation and no-slip boundary conditions
121    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
122      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
123    o pkg/seaice: a first HSALT time stepping equation has been checked in
124    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
125      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
126      without requiring DO-IF statements
127    o pkg/thsice:
128      use continuous power-law function for partition of energy between lateral
129      melting/freezing and thinning/thickening ; old code using step function
130      still available with #undef THSICE_FRACEN_POWERLAW
131      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
132    o testreport: change AD testing : check against results/output_adm.txt
133      using same scripts as for forward test.
134    
135    checkpoint59g
136    o adjoint testing: in preparation for changing testreport:
137      - output format: cost and grad written on separated lines
138      - ad output results in directory "results" (instead of "results_ad")
139    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
140    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
141    o pkg/ecco: allow user defined cost function contributions
142    o testreport:
143      Allow to choose (per experiment) the list of tested output variables
144       and the main variable (used to issue a pass/FAIL ) ;
145      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
146      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
147      Also modify printing of summary:
148       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
149       b) echo the list of tested variables in the individual summary.txt of
150          each experiment.
151    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
152      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
153      (but still depend on the tile decompostion of the domain).
154    o pkg/seaice: change a discretization detail to make the B-grid code
155      "more symmetric". This change is likely to remove all "ridges/leads" that
156      where quasi-aligned with the grid in B-grid solutions. It may also be
157      the solution to the stress coupling issues with the B-grid.
158    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
159      remove .cvsignore from input dir. (since testreport no longer run here).
160    o pkg/thsice:
161     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
162     - fix reshaping of sea-ice just after advection:
163       melt all the ice only if ice-volume is too small.
164     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
165       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
166     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
167    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
168      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
169    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
170      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
171      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
172      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
173      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
174      -> update output.txt
175    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
176     this affects truncation error: -> update output.txt of exp:
177      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
178      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
179    
180    checkpoint59f
181    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
182    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
183      a bounded range (in forward mode)
184    o pkg/ecco, ctrl, autodiff and mom_common:
185     internal parameter controls, completements of implementations
186    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
187    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
188      (not seem any difference in testing results).
189    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
190       at face corners.
191    o pkg/generic_advdiff:
192     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
193      loop range indices for computing vertical advection tendency
194      and do the calculation in the interior only (no overlap) ;
195      for now, only implemented for SOM advection (to save CPU time).
196     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
197    o exch2 adjoint
198      First set of changes:
199      - add exch2 hand-written adjoint templates
200      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
201        This will require cleanup in pkg/autodiff/*.F
202        (changed routines currently kept separate in verif. code/)
203      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
204        that used to hide exch2 or cubed-sphere specific code
205        (commented via 'cph-exch2')
206    o pkg/seaice
207      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
208    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
209       output of global_ocean.cs32x15.thsice .
210    
211    checkpoint59e
212    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
213      for B-grid vector (not yet tested) and C-grid vector (<- only used
214      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
215    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
216      (#ifdef ALLOW_SALT_PLUME)
217    o gather_2d/scatter_2d: removed halo regions
218    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
219      scheme and the corresponding test case (under front_relax dir). For now,
220      only available with Skew-flux form and not yet tested in realistic set-up.
221      adjoint: store directives updated, but gradient checks deteriorated,
222      so maybe GM/Redi adjoint is now broken.
223    o seaice adjoint
224      * add AREA, HEFF, HSNOW as control variable
225        (should not change lab_sea results)
226      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
227    o pkg/seaice:
228      * added computation of saltFlux in seaice_growth;
229        For time being, sea ice salinity is assumed constant
230        contribution of snow flooding to freshening of sea ice is neglected.
231        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
232        defaults to 0.0 in order to maintain backward compatibility.
233        Typical values for SEAICE_salinity are 4 to 10 g/kg.
234      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
235      * added SEAICE_availHeatFrac, which specifies fraction of surface level
236        heat content used to melt or grow ice
237      * commented out cap of HICE: it helps keep ice thinner
238      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
239      * applied OBCS T/S mask to HEFFM sea ice mask
240    
241    checkpoint59d
242    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
243     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
244     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
245    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
246     and change default value of parameter "GM_Small_Number";
247     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
248       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
249       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
250    o pkg/ecco: cost function when applying pkg/smooth to controls
251    o pkg/ctrl: add forcingPrecond run time parameter
252    o pkg/seaice:
253     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
254     - fix bug in metric terms of u-equation in LSR solver (implicit part),
255       changes verification/lab_sea
256     - rearrange implicit part of u-equation in LSR solver to make it easier to
257       read, understand, and debug. This causes changes at the truncation level.
258     - fix (serious) bug in the boundary conditions (sign error in the implicit
259       part) of the LSR solver. Changes all LSR results.
260     - fixed problem with HSNOW initialization to avoid thick snow when AREA
261       is initilized with small values - does not change lab_sea results.
262     - added HsnowFile initialization capability
263    o pkg/smooth: addition to model/src and pkg/ctrl so allow
264     initialization of pkg/smooth and application to control vector
265    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
266    o dependencies: pkg/profiles requires pkg/cal
267    o pkg/profiles:
268     - added option ALLOW_PROFILES_GENERICGRID
269         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
270         that interpolation information (grid points and coefficients) is provided
271         within the netcdf input files.
272         -> sample matlab scripts can be found in MITgcm_contrib/gael
273         that allow you to prepare netcdf input files.
274     - also modified: cleaner include statements, cleaner error print statements,
275       cleaner stops when error, and more tests of the netcdf input files consistency.
276    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
277    o pkg/seaice:
278     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
279       requires a new routine: seaice_diagnostics_fill.F
280     - make sure that seaice does not move if not forced (pressure replacement
281       method, Hibler and Ip, 1995), changes results
282     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
283     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
284       It is turned off by default (=-1.), because it changes the results.
285     - make it possible to read AREA from a file, too.
286    
287    checkpoint59c
288    o add S/R and diagnostics for oceanic mixed-layer depth
289    o move GMRedi call after all vertical mixing schemes (including KPP)
290    o pkg/thsice:
291     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
292      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
293    o pkg/obcs:
294     - bug fix for balance code
295    o pkg/seaice:
296      - allow values of SEAICE_elasticParm > 1
297      - add new parameter SEAICE_evpTauRelax as an alternative
298        to SEAICE_elasticParm
299      - make lsr boundary conditions free slip (by default), changes result
300      - add code for no slip boundary conditions for lsr
301      - set minimum of zeta to zero (and not 4e8) (changes results)
302      - add a cap on AREA after advecting AREA if seaice_growth is not called
303    o change calculation of Visbeck K:
304      - no longer depend on tapering scheme; instead, compute slope (limited
305        by GM_maxSlope). this is equivalent to what was comuted before with
306        clipping or linear tappering.
307      - fix vertical averaging (wrong by 1/2 level)
308      - leave the old version (but will not be maintained) within
309        #ifdef OLD_VISBECK_CALC / #endif
310      - update output of exp. ideal_2D_oce
311    o change error catch in calc_r_star to improve vectorization
312    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
313      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
314    o adjoint:
315      Re-organized adjoint checkpointing according to Matt Mazloff
316      (but with modifs/completions/cleanups)
317      Storing is now bundled into large arrays to optimized I/O
318      (and second step in cleanup of the_main_loop)
319    
320    checkpoint59b
321    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
322      - export/import (between ocean & coupler) fields needed for ocean DIC.
323    o pkg/seaice:
324      - get rid of three more exchanges seaice_calc_viscosities (required
325        different loop boundaries in seaice_lsr and seaice_ocean_stress)
326      - bug fix in seaice_ocean_stress (update of lab_sea required)
327      - reduce loop boundaries to necessary minimum also in seaice_evp
328      - go back to the old way of computing deltaC/Z as the adjoint likes that
329        better
330    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
331      passive tracer to an Age Tracer) + update output.txt
332    o pkg/exf:
333      - implement A-grid / C-grid selection for wind-stress input files.
334      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
335      for now, in exf_bulk_largeyeager04.F only :
336      - change implementation for case where windspeed + 2. components wind-stress
337        are read-in. AND use rhoConstFresh to convert evap.
338    o pkg/seaice:
339      - use correct EXCH_UV for wind-forcing (on A-grid).
340      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
341        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
342    o pkg/exf:
343      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
344      EXF_INTERPOLATION:
345      - merge global_with_exf/code version of exf_interp_read.F
346        to the main code ;
347      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
348        reading the file ; Important: This options needs to be defined to recover
349        previous code.
350        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
351      - no longer loose real*8 precision along the way when using exf_iprec=64.
352    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
353      - change discretisation of evp-solver in order to avoid another exchange
354        (changes lab_sea) and clean up a little
355      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
356        help the adjoint (this also changes the results slightly)
357      - add a few "_d 0" where they had been missing in seaice_evp.F
358      - cleaning up: remove unused seaice_calc_rhs.F
359    o pkg/exf: some cleaning-up:
360      - change various "constants" into runtime parameters
361      - cleaned-up Large&Yeager04 routine which should eventually
362        replace exf_bulkformulae.F (changed names of S/R and CPP)
363        and merged various ALLOW_ATM_WIND options
364     only used with thsice pkg (in thsice_get_exf.F):
365      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
366        which are used when useStabilityFct_overIce=TRUE (= the default)
367      - change default values of ice & snow emissivity and scale downward LW
368        by ice & snow emissivity.
369    o pkg/thsice:
370     fix few little problems, in thsice_calc_thickn.F:
371      - growth vertically (and not laterally) if iceFrac == iceMaskMax
372      - melt only laterally if hIce < hThinIce (as the comments say)
373      and in thsice_extend.F:
374      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
375      - start to form ice as soon as the minimum ice-volume is reachable.
376     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
377      and cpl_aim+ocn
378    o pkg/kpp
379     - move computation of surface related input fields to KPP into a new
380       subroutine kpp_forcing_surf.F
381     - remove wrong (within bi,bj loops) EXCH calls.
382     - little cleaning (add argument myThid in last position, cvs header ...)
383     - for now, fix conservation problem by exchanging KPPviscAz (may not
384       be the best fix)
385    o pkg/seaice
386     - check for inconsistent evp parameter/cpp-flag combination
387     - remove leftover errIO flat for obsolete name list error handling
388    o OpenAD
389     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
390    
391    checkpoint59a
392    o pkg/seaice: some parameter clarifications and a little bit of clean up
393    o pkg/thsice: rename run-time parameters:
394       himin       -> hIceMin
395       himin0      -> hThinIce
396       hihig       -> hThickIce
397       i0          -> i0swFrac
398       transCoef   -> bMeltCoef
399       frac_energy -> fracMelting
400      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
401       with default values (for now) that do not change the results.
402      remove old version of thsice vars advection in pkg/seaice.
403    o in FFIELDS.h:
404      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
405      - make pLoad & sIceLoad always available (but still only used if
406         ATMOSPHERIC_LOADING is #define).
407    o pkg/kpp: replaced _KPP_RL with _RL
408    o bug fixes for vertical diffusivity computations when both KPP and
409        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
410        are no longer updating the vertical diffusivity array
411        (passed as argument) but are (re-) setting those arrays.
412    o pkg/seaice: fix bug in evp solver, while doing that
413      - change (improve?) discretization of stress computations for both
414        cgrid-lsr and evp solver
415      - add a new routine to compute strain rates
416      - the above changes lab_sea results
417      - add no slip conditions for evp solver (off by default), lsr-version
418        may follow
419      - fix exchange for shear at Z-points (does not change lab_sea)
420      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
421        (to force the user to pick a time step since there is not "safe" way
422        of choosing it)
423      - add principal stress diagnostics
424      - rearrange fields for evp a little to avoid having to call a: too many
425        exchanges and b: exchanges for stress trensor components which we do
426        not have.
427      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
428        of evp, complete rewrite for lsr case (latter is does not yet work
429        in all cases)
430    o pkg/kpp: add code to have mixing in shelf ice caverns
431      - add myThid to all kpp routines (long overdue)
432    
433    checkpoint59
434    o pkg/exf:
435      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
436        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
437      - move exf header files from lower_case.h to UPPER_CASE.h ;
438        add missing cvs Header & Name
439      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
440      - add namelist param. selectStressGridPosition, exf_monFreq
441      - retire many _CLIM routines, and remove data.exf_clim
442        + params moved to data.exf
443        + climsst, climsss now handled by exf_set_gen, i.e.
444          climss?period=0 refers to constant field,
445          climss?period=-12 to monthly forcing
446      - split up namelists in data.exf
447    o pkg/seaice:
448      - remove seaice_exch and seaice_exch_uv
449      - remove superfluous exchange of theta
450      - add myThid to seaice_budget_ocean/ice
451      - add new interface for atmospheric wind forcing (C-grid only)
452        + new routine
453        + two new field (taux, tauy for stress over ice)
454        + removed one global field (DAIRN) for C-grid case only
455    o pkg/thsise
456      - 2nd set of modifs for thsice adjoint in conjunction with exf
457    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
458    
459    checkpoint58y_post
460    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
461      vertical diffusivity, similar to that in MOM4; turned on using
462      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
463      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
464    o Added capability for 3D specification of background vertical diffusion
465      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
466      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
467      "data" file that contains the 3D vertical diffusivity coefficients.
468    o ice dynamics (pkg/seaice) with thsice thermodynamics:
469      - add code within pkg thsice to advect & diffuse sea-ice fields
470      similar to (and will replace) what has been added in  seaice_advdiff.F,
471      but: - conserving Mass, Heat & Salt.
472           - better when using non-linear advection scheme (not yet fully tested)
473           - can also be used in atmospheric set-up (for now, only the diffusion).
474    
475    checkpoint58x_post
476    o IO option for global-file compact format:
477      - add options when generating topology (utils/exch2/matlab-topology-generator)
478      - add I/O capability (pkg/mdsio).
479      - adapt utils/matlab/rdmds.m to read this format.
480      for now long-line format not yet supported by pkg/mdsio (& exch2).
481    o shelfice: add a few diagnostics
482    
483    checkpoint58w_post
484    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
485      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
486      (and replace horiVertRatio in NH code).
487      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
488                         and tutorial_plume_on_slope (sensitive to truncation)
489    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
490      directly to drive seaice model (C-grid only)
491    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
492     - reintroduce computation of wind from stress,
493     - compute tau (in exf_bulkformulae.F) from windstress averaged to
494       mass points to avoid tau = 0
495     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
496    o rdmnc.m: make it work with "global" files created with gluemnc
497    o rdmnc.m : some improvements in dealing with singleton dimension
498      (tested on all testreport mnc output files).
499    o genmake2: disable pkg/profiles if netcdf test fails.
500    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
501    o move call to cal_readparms up to make calendar parameters/variable available
502      to all packages
503    
504    checkpoint58v_post
505    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
506      useDynP_inEos_Zc tested.
507    o pkg/exf: changes to properly interpolate/mask/scale initial fields
508    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
509      and portions thereof.  See read_cs.txt for description and examples.
510    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
511      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
512      following the great-circle arc between those 2 points.
513    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
514      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
515    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
516     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
517     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
518     - still needs work (not working with some options ; efficiency to improve)
519       and serious testing.
520     - use this scheme for temperature & salinity in 2 advection test exp.:
521       advect_xy & advect_xz, respectively.
522    
523    checkpoint58u_post
524    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
525    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
526    o testreport: add option "-skipdir" to skip some test.
527    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
528      momentum calculation.
529    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
530    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
531      remove checkpoint.F and the_correction_step.F (no longer used);
532      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
533    o add option (linFSConserveTr) to correct for tracer source/sink due to
534      Linear Free surface
535    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
536    o pkg/thsice: fix reading mnc-pickups
537    
538    checkpoint58t_post
539    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
540    o pkg/mdsio:
541     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
542       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
543       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
544     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
545     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
546       either MDS_READ_FIELD or MDS_WRITE_FIELD )
547     - new S/R (to replace MDSWRITEMETA), which allows to write more
548       informations (variable names, time ...) to meta files.
549     - modify rdmds.m to give back the meta file content.
550    o pkg/diagnostics: change vertical interpolation to be safer, and more
551       flexible (define p-levels to interpolate to in data.diagnostics);
552      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
553       diagnostic pointer.
554    o pkg/seaice: more cleaning up of seaice_growth, added many comments
555    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
556    o fix multi-category seaice:
557     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
558       SEAICE_MULTICATEGORY
559     - fix short wave heat flux
560    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
561       and allow to use EVP solver. Change forward lab_sea: test both EVP
562       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
563    o Initial check-in of lab_sea adjoint
564      (very similar to natl_box_adjoint/code_seaice)
565      * used C-grid and EVP solver
566      * used KPP, GM/Redi
567      * uses inAdExact=.TRUE.
568      * gradient checks fail for both ADM and TLM
569        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
570        f.d. gradients actually seem more problematic than ADM, TLM gradients;
571        issue is related to forward mismatch between g77 an ifort
572    o pkg/seaice: overhaul of thermodynamics
573     - growth.F and groatb.F are replaced by new routine seaice_growth.F
574     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
575     - move a few global fields out of SEAICE.h into seaice_growth.F and
576       make them 2D (FICE/QNETO/ ...)
577     - remove FO (it is the same as QNETO)
578     - introduce a few local fields to avoid modifying external fields such
579       as atemp, etc.
580    
581    checkpoint58s_post
582    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
583      changed exf_set_gen.F so that
584        genperiod=0 means input file is one time-constant field and
585        genperiod=-12 means input file contains 12 monthly means
586    o CG2D: use pre-computed solver main-diagonal (stored in common block);
587      this affects truncation error ; generate new output file for exp. which
588      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
589        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
590        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
591        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
592        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
593        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
594    o start implementation of deep-atmosphere and anelastic formulation
595    o verification: remove 2nd copy of input files and use script "prepare_run"
596      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
597    o mom_common/vecinv/fluxform: fix a few initialisation isssues
598    o profiles: fix for multithreaded case
599    
600    o diagnostics: rename few diags:
601      s/'PRESSURE'/'RCENTER '/g
602      s/'TICE    '/'oceFreez'/g
603      s/'TAUX    '/'oceTAUX '/g
604      s/'TAUY    '/'oceTAUY '/g
605      s/'SWFLUX  '/'oceQsw  '/g
606      s/DIFx/DFxE/g
607      s/DIFy/DFyE/g
608      and add few ocean-forcing diagnostics:
609      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
610    o modifications to pkg/seaice/growth.F and budget.F, which change results of
611      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
612      as actual snow thickness.  It now refers everywhere to effective snow
613      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
614    
615    checkpoint58r_post
616    o modifications to pkg/seaice/growth.F, which change results of
617      lab_sea experiment: fixes pertain to melting snow over open water, to
618      masking EVAP under sea ice, and to using the correct AREA variable for
619      computations of EVAP, PRECIP, HSNOW, and GHEFF
620    o add ability to read bathy, salt, and theta using MNC (off by def)
621    o add flooding algorithm and advection of HSNOW for pkg/seaice;
622      both are turned off by default and do no change any results
623    o seaice advection with pkg/thsice: a step toward the use of non-linear
624      advection scheme, but #ifdef or commented out for now (requires more EXCH).
625    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
626      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
627      in natl_box (affects results @ truncation level: update output.txt)
628    o multi-threading and IO:
629      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
630      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
631        (needed to work with SingleCpuIO): tested in all verif. exp.
632    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
633      affects the results (but none of the verification test uses this scheme).
634    o Adding some pkg/diagnostics capability to pkg/seaice
635      (will certainly be subject to changes)
636    o ctrl: adding new control variables:
637      lwflux, lwdown, evap, snowprecip, apressure, runoff
638    
639    checkpoint58q_post
640    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
641      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
642      high_res_cube configuration by 4% on Columbia.
643    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
644      add (in global_with_exf/code) a version of EXF_INTERP_READ without
645      dynamical allocation (seems to work in multi-threaded).
646    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
647      single CPU io) so that TAF does not have to see EESUPPORT.h
648    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
649    
650    checkpoint58p_post
651    o obcs: stop if obcs is used with useCDscheme = .true.
652    o shelfice:
653     - fix a sign error so that no slip at shelfice interface works
654     - remove stop for combination non-hydrostatic code and shelfice. That does
655       not mean, that the results are correct, but at least they are numerically
656       stable
657    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
658    o added adjoint exch routined for all exch*3d* routines
659      and updated flow directives
660    
661    checkpoint58o_post
662    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
663      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
664    o change controling S/R for writing pickup file (new S/R do_write_pickup)
665      and clean-up reading/writing of pickup files.
666    o fix local version of read/write pickup (NH part) in rotating_tank/code
667    o simplify EXCH interface:
668     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
669     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
670    o added the regrid package
671    o shelfice:
672     - add a simple boundary layer scheme to reduce noise
673     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
674    
675    checkpoint58n_post
676    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
677       local variable (not in common block).
678    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
679      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
680      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
681        to work with SingleCpuIO.
682    o add "_d 0" to real constant of pkg/cfc subroutines ;
683       update exp. cfc_exemple & tutorial_cfc_offline output files.
684    o multi-threading and IO:
685      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
686        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
687      - barrier before and after reading.
688      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
689      - avoid using MDS_WRITELOCAL for LAND pkg output.
690      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
691        common-block variables ; Allows multi-threading with master-thread IO.
692    o change default MAX_NO_THREADS from 32 to 4 ;
693      and stop cleanly when MAX_NO_THREADS is too small.
694    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
695    
696    checkpoint58m_post
697    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
698       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
699    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
700       keep global_ocean.90x40x15 (for AD testing) with former secondary test
701       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
702    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
703        add MITgcm_tutorials (= code + all the tutorials)
704    o ecco, option to compute cost for total ssh (mean+anom)
705    o consistent with addition of ptracer and ssh in pkg/profiles
706    o profiles: adding ptracer and ssh
707    o testreport: change multi-test output-file name
708      (from output.txt.{name} to output.{name}.txt)
709    o profiles: now ok for mutli-tiles case
710    o seaice: add 4 parameters for different advection schemes for area,
711      (effective) seaice thickness, enthalphy, and snow height. Their default
712      is the standard parameter SEAICEadvScheme
713    o calc_gw:
714     - add cosFacU in zonal viscous flux (harmonic.visc.).
715     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
716       of tutorial_plume_on_slope.
717    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
718    o calc_gw: true flux-form, account for horizontal grid spacing.
719      update rotating_tank results, but not plume_on_slope (affected at
720      truncation level, 11 digits).
721    
722    checkpoint58l_post
723    o calc_gw:
724     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
725     - remove side-drag for now (need to fix it); update plume_on_slope results.
726     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
727    o commit code to make SST/SSS weights spatially variable
728      (based on either variable in-situ or variable initial T/S weights)
729    o pkg/ecco:
730      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
731        now based on horizontally varying weights wthetaLev, wsaltLev
732      * cost_averagesflags now returns year indices in addition to day, month
733      * sflux balance is performed on annual basis
734        (sflxumm, sfluxmm2, bal_sfluxmm)
735      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
736        including separate counting and multipliers
737    o pkg/rbcs
738      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
739    
740    checkpoint58k_post
741    o testreport:
742     - always build in dir. "build" (if not there, mkdir build instead of building
743       & running in input)
744     - run in dir run (if it exists), in build otherwise.
745     - call prepare_run (if input/prepare_run exists)
746     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
747    o pkg/exf modifications to interpolation and rotation routines for more
748       reasonable treatment of North Pole singularity: for tracers North Pole
749       value is set to northernmost zonal-mean value, for zonal velocity it is
750       set to zero, and for meridional velocity it is set to northernmost value.
751    o pkg/exf/exf_check_range.F
752     - add tile index to diagnostics and move stop statement to the very
753       end of the routine.
754    o pkg/diagnostics: (diagnostics_main_init.F)
755      define title of isomorphic variables according to the current config.
756    o pkg/thsice with pkg/seaice dynamics:
757    - fix domain of computation (interior only, required for exf) and do exchanges
758    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
759    o towards a standard way of dealing with multi-threading in MONITOR
760      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
761    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
762       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
763    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
764    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
765    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
766       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
767    o tracer advection:
768     - clean-up and simplify calc_common_factors.F
769     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
770       advection subroutine (but still not used within DST advection S/R)
771    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
772    
773    checkpoint58j_post
774    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
775      from file (collects calls previously in FORWARD_STEP)
776    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
777    o adjoint store dir. adjusted accordingly
778    o genmake2
779      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
780    
781    checkpoint58i_post
782    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
783      on wind stress (SEAICEstressFactor defaults to 1.)
784    o Total number of Timers is finite (<=40): comment out 2 non-essential one
785      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
786    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
787      on CS-grid: no longer loosing mass.
788    o exf & curvilinear-grid: no longer modify longitude xC & xG.
789    o pkg/ggl90: fix sloppy output and fix a bug
790    o pkg/seaice: added SEAICEuseEVPpickup parameter
791      - Set to false in order to start EVP solver with
792        non-EVP pickup files when using SEAICEuseEVP
793      - fix sign error in diffusion in seaice_calc_rhs
794    
795    checkpoint58h_post
796    * Modifications for bottom topography control
797      o replace hFacC by _hFacC at various places
798      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
799      o add non-self-adjoint cg2d_nsa
800      o update autodiff support routines
801      o re-initialise hfac after ctrl_depth_ini
802      o works for 5x5 box, doesnt work for global_ocean.90x40x15
803    * Adding verification for 5x5 box (4-layer) bottom topography control
804    
805    checkpoint58g_post
806    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
807       used for mean seasonal cycle, mean diurnal cycle); add an example
808       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
809    o pkg/ggl90:
810      - add parameter (minimum surface kinetic energy)
811      - fix bug (avoiding division by zero)
812    o couple pkg/thsice to pkg/seaice:
813      - modify advection in seaice to accomodate new scalar fields to be advected
814      - only muliDimAdection scheme work with seaice/thsice
815      - mapping of thsice-variables to seaice-variables, back and forth
816      - does not break the verification experiments, but does not give the
817        desired results either
818    o pkg/seaice
819      - make (default) second order advection a bit less confusing?
820    
821    checkpoint58f_post
822    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
823      to pkg/seaice):
824      - new routines thsice_map_exf and thsice_get_exf provide the interface
825      - add an additional formal parameter to thsice_solve4temp
826    o pkg/exf:
827      - add new fields wspeed, snowprecip (to be able to couple to thsice)
828      - correct Stefan-Boltzmann constant
829      - new parameter for longwave surface emittance
830      - separate some stuff from exf_bulkformulae into new routines  
831        exf_radiation, exf_wind
832      - add new parameters and constants: longwave emissivity for ocean, ice
833        and snow, evaporation parameters over ice
834      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
835        either wind from stress or stress from wind
836    o pkg/thSIce:
837    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
838    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
839       and THSICE_CALC_THICKN
840    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
841    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
842      to make debugging easier.
843    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
844    o pkg/bulk_force:
845      - clean-up comments and parameters ;
846      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
847    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
848      generate new output for test-experiment: aim.5l_cs.thSI
849    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
850      testreport accordingly
851    
852    checkpoint58e_post
853    o SEAICE_CGRID adjoint done
854    o R_STAR adjoint implemented.
855      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
856      * need to sort out init. of h0facc, etc.
857    o Make pkg/profile fully independent of ecco,cost, etc. stuff
858      to be able to use it in pure forward.
859    
860    checkpoint58d_post
861    o upgrade simple test-experiment to tutorial example:
862     step.1: duplicate the experiment and (step.2) will remove the old copy.
863      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
864      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
865      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
866      tutorial_global_oce_biogeo    <- copy of dic_example
867      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
868      tutorial_plume_on_slope       <- copy of plume_on_slope
869      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
870      tutorial_global_oce_optim     <- empty for now (David ?)
871      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
872     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
873    o correct a sign problem in cost_scat.F
874    o obcs and ptracers: fix boundary conditions for advections schemes
875      with larger stencil
876    o thsice adjoint: start
877    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
878      completeness
879    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
880      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
881    o ptracers adjoint:
882      * avoid extensive recomputatations
883      * fix missing re-init. of gptr (missed by TAF)
884    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
885      me to turn off the excessive output to STDOUT that this package produces
886    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
887      and add those terms in Vector-Invariant formulation.
888    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
889      if the control period (xx_hfluxperiod etc) is 0
890    o in profiles pkg, clean routines and fix details
891    o in ecco pkg, reading ssh data:
892      fix problem in case the model does not start at iter0=0
893    o fix mnc-pickup/restart for ptracers
894    o new package prifiles:
895      code to compute profile-based cost by Gael Forget
896      (modifs in ecco, ctrl, autodiff)
897    o Benign bug fix in initialization (spotted by M. Mazloff) of
898      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
899    
900    checkpoint58c_post
901    o adjoint: finish NLFS adjoint and provide reference output in
902      verification/global_ocean.90x40x15/results_ad_nlfs
903    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
904      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
905      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
906      with SEAICE_CGRID defined.
907    o move calendarDumps from "data" to "data.cal" and clean-up the code
908      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
909    o add useEXF & useCAL flags (for now, set in hard-coded way)
910    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
911      (were missing in NH mode, and wrong in quasihydrostatic mode).
912      waiting for Chris updated version of calc_gw to add those CALLs.
913    o fix bug in quasihydrostatic S/R ;
914      add a test for this option: global_ocean.90x40x15.qshyd
915    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
916      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
917    o add on/off flag useOffLine for package OFFLINE
918    o seaice:
919      - modify advection so that it works also on the C-grid
920      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
921        problem in multi-tile runs with C-grid
922      - add flags for clipping ice velocities and/or masking solver forcing
923      - fix drag (ocean on ice) formulation and a bug that caused noise in the
924        C-grid solver
925      - added a few comments to seaice_diffusion.F
926      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
927        are now exclusive)
928      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
929        required re-ordering the code a little:
930       + make DAIRN global variable (defined in SEAICE)
931       + move computation of the viscosities eta and zeta into a new separate
932         routine (because I need to recompute them in seaice_ocean_stress.F)
933    
934    checkpoint58b_post
935    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
936      update output.txt of exp. aim.5l_cs.thSI
937    o various mnc cleanups and improvements:
938      + shrink lookup tables by factor of ~4
939      + better error reporting when running out of lookup space
940      + able to handle longer path/file names (up to 500 chars)
941    o adjoint:
942      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
943      - TBD: "hidden" mom_vecinv recomp. in dynamics
944    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
945     (allow to differentiate between forcing components using new integer flags:
946      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
947     and add new flag to put Dissipation tendency out of Adams-Bashforth.
948    o ecco
949      - enable trend removal from SSH anomaly obs.
950    o adjoint
951      - a fix for PmEpR when #undef EXACT_CONSERV
952      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
953      - try to fix "hidden" recomp. in forward_step for NLFS
954        (NLFS seems broken sometimes after I checked it in)
955    o seaice:
956     - add c-grid version of the dynamic solver:
957       + three new routines that are the c-grid substitute lsr, dynsolver
958         and ostres
959       + put a few fields that were local to dynsolver into global common
960         blocks, so that I can move the computation of stresses etc into
961         seaice_lsr (saves coding but may break the adjoint).
962     - replace more hardwired parameters by runtime parameters
963     - add ice masks that mask the rhs of the implicit solvers where there
964       is no ice (commented out in seaice_dynsolver, because i am not sure
965       if this works properly), eventually this should replace the clipping
966       of ice velocities in seaice_dynsolver to +/-40cm/s.
967    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
968      include it only where its needed
969    o move balancing of fluxes before the call of external_forcing_surf
970    o seaice:
971      - correct units of turning angles (now they are really in degrees)
972      - move computation of GWATX/Y out of main routine into dynsolver
973      - initialize GWATX/Y in seaice_init
974    o Apply mask on Fresh-Water flux (needed for SSH forcing).
975      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
976    o seaice: add runtime flags for turning angles (default to zero)
977    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
978      and trend from exf forcing and ctrl control adjustments
979    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
980      (since checkpoint57x_post)
981    o change the default rotation period to 86164.s = the Earth rotation
982    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
983      and based on a reference stratification. Tested within hs94.cs-32x32x5.
984    o seaice advection: add code for choosing between the default (2nd order
985      central differences) and multiDim advection schemes provided by
986      pkg/generic_advdiff
987    o seaice:
988      - removed all references to SEAICE_GRID.h fields from
989        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
990        (cubed-sphere configuration will change a little)
991      - grid computations in seaice_init are obsolete now.
992      - cleaned up code a little so that is easier to read (hopefully).
993      - added new (better?) discretizations of default advection and diffusion
994        (turn on with SEAICEuseFluxForm)
995      - replace 1 in 3d global fields by kSurface in growth.F
996      
997    checkpoint58a_post
998    o seaice:
999      - bug fix in advect.F
1000    o shelfice:
1001      - separate shelfice load anomaly from pload (breaks with time
1002        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1003        Its default is 0., but it may be computed more cleverly from (unknown)
1004        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1005        done offline. A good approximation of the pressure load anomaly is
1006        necessary to avoid large initial adjustment processes underneath
1007        deep-reaching shelfice.
1008      - small fix in ISOMIP shelfice_thermodynamics
1009      - add more sophisticated thermodynamics of Hellmer (1989), this is
1010        now the default
1011      - give a few constants more intuitive names
1012    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1013      if bulk formulae are used in long integration (especially EmPmR). Turn
1014      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1015      if balancePrintMean, the imbalance that is substracted is printed to
1016      STDOUT.
1017    o fix bug (typo) in obcs_apply_eta.F
1018    o add a new package shelfice which enables us to model the circulation
1019      underneath shelf-ice with draughts of hundreds of meters.
1020     - works
1021     - to do: + include improved thermodynamics
1022              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1023                instead of new field kTopC
1024              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1025                instead of new field R_shelfIce and new code in ini_depth.F
1026                and ini_mask_etc.F?
1027              + adjust vertical mixing schemes?
1028    o seaice pkg:
1029     - add a cpp-flag to include a simple formula for a salinity dependent
1030       freezing point of sea water at the surface
1031     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1032       meridional stresses are now different (and hopefully correct)
1033    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1034       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1035       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1036    o pkg/diagnostics: add options and parameters for regional-statistics
1037       diagnostics ; define regions by reading a region-mask from a file
1038       (might add other options later)
1039    o pkg/bulk_force:
1040     - add option and parameters to use AIM surface-flux formulae.
1041     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1042       others forcing fields (defined in PARM05, parameter file "data") are loaded
1043       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1044     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1045     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1046     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1047       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1048     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1049    
1050    checkpoint58
1051    o add "--embed-source" option to genmake2 which, when the supporting
1052      tools can be compiled (as determined by genmake2) will turn on the
1053      embed_files package which then embeds the entire MITgcm source code
1054      (*.[fFhc] + Makefile) used for the build within the executable
1055      - requested by CNH but off by default
1056      - adds a paltry <9MB to the mitgcmuv executable in most cases
1057      - only writes the output when useEMBEDSRC in eedata is true
1058    o clean up 3-dim. relaxation codes:
1059      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1060      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1061      * Thanks to Tom Haine for testing!
1062    
1063    checkpoint57z_post
1064    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1065      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1066    o fix the pickup behavior for obcs in combination with ptracers
1067    o fix a bug in ptracers_external_fields_load
1068    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1069      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1070    o transfered surface NH pressure to eta field (if exactConserv).
1071    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1072         and update lab_sea output.txt file.
1073    o completing 3-dim. relaxation code: additional term
1074         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1075      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1076      * At compile time, in "EXF_OPTIONS.h" set
1077          #define  ALLOW_CLIMTEMP_RELAXATION
1078          #define  ALLOW_CLIMSALT_RELAXATION
1079      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1080          tauThetaClimRelax3Dim = 15552000.0,
1081          tauSaltClimRelax3Dim  = 15552000.0,
1082      * 3 cases:
1083          1) Use a constant-in-time 3-dim. field
1084          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1085          3) Real-time relax. to time-evolving prescribed field
1086    o Adding Laplacian-type smoothness constraint on
1087      initial and boundary (forcing) controls (ic, bc)
1088      * enable at compile-time via
1089        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1090      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1091      * Absolute scale somewhat unclear so far
1092      * no area weighting was included since no other cost term does so far
1093    
1094    checkpoint57y_post
1095    First step for a NLFS adjoint
1096    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1097    o new init. routines for calc_r_star, calc_surf_dr
1098    o still need to deal with ini_masks_etc
1099    o testreport seemed happy
1100    checkpoint57y_pre
1101    
1102    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1103    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1104    o add new offset feature to offline pkg (plus minor cleanup)
1105    o cfc fixes for final year of integration
1106    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1107      be in GCHEM_OPTIONS).
1108    
1109    checkpoint57x_post
1110    o fix testreport Pb in multiple test experiment.
1111    o cleanup our namelist syntax in verification:
1112      - make it more F95 standards compliant (some work still needed)
1113      - allows the vast majority of our tests to work with gfortran
1114    o Non-Hydrostatic:
1115     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1116     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1117    o Allow to apply AB on T,S rather than on AB(gT,gS):
1118     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1119     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1120       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1121     - need a "clever" read_pickup to restart from the other AB formulation
1122    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1123    o remove some unused variables (reduces number of compiler warnings)
1124    o adjoint
1125      * Disable useVariableViscosity for adjoint for time being
1126        (there are a number of extensive recomputations)
1127      * Initialize certain variables needed for adjoint
1128    
1129    checkpoint57w_post
1130    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1131                 fix the singleCpuIO RS version of MDSWRITEFIELD
1132       and add a WARNING if using globalFiles=T with multi-processors.
1133    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1134      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1135    o tracer advection scheme:
1136      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1137       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1138       was not very convenient).
1139      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1140       (further tests needed for the implicit DST & Flux-Limiter schemes).
1141    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1142      and sRef for convenience, handy, when you want to initialize
1143      ptracers in a large domain with a constant non-zero value. Also,
1144      untangle ptracers_init.F a little.
1145    
1146    checkpoint57v_post
1147    o change dome exp. to use variable viscosity in side-drag terms.
1148    o remove all the files from the cfc_offline test since they are now
1149      incorporated into tutorial_cfc_offline which has been producing
1150      identical results for a few days of testing
1151    o add new parameter: sideDragFactor to enable half-slip-side BC
1152      and change side-drag S/R to use viscosity from mom_calc_visc
1153      (can switch back by setting sideDragFactor=0.); affects results at
1154      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1155       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1156    o vorticity & strain are now computed without masking, to account for
1157      no-slip-side BC in variable viscosity calculation ; mask is applied
1158      anyway later on, before computing advection/coriolis terms.
1159    o modify exp4 to test new obcs support for reading from external files
1160      and for passive tracers
1161    o fix behavior of ptracers_monitor when monitor output is written to a
1162      netcdf-file; still not independent of monitor.F (writes in the same
1163      file).
1164    o change default value of tRef (put a uniform, meaningful value for ocean
1165      & atmos) and initialize sRef (was missing, as Martin mentioned).
1166    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1167      to be proportional to enstrophy dissipation length.  Thus,
1168       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1169      This is now consistent with Smagorinsky and with the manual.
1170    
1171    checkpoint57u_post
1172    o OBCS and PTRACERS: add open boundary support for passive tracers
1173      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1174        OB-values from file; this is not different from the way theta and salinity
1175        are treated
1176      - however, Orlanski-radiation conditions are not supported, and the model
1177        will stop if you use pTracers and Orlanski at the same time.
1178      - beefed up the rountine obcs_external_fields_load: now only those open
1179        boundary values are overwritten with values from files for which there
1180        are really files, otherwise the OB-fields remain untouched. This makes
1181        it possible to use different OBs at different ends of the domain (as
1182        with EXF)
1183    o reduce number of exch calls in shap_filt (s2).
1184    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1185      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1186    
1187    checkpoint57t_post
1188    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1189    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1190      same truncation, independent of the face number: affects affects several
1191      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1192    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1193      note that biharmonic viscosity + no-slip was not tested in any experiment.
1194    o fix bug in non-linear free-surf side-drag ; generate new output for
1195      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1196    o make mnc honor the writeBinaryPrec flag for most kinds of output
1197    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1198    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1199      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1200    o add brackets in multi-terms sum to get same truncation, independent of
1201      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1202      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1203    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1204      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1205      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1206      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1207      Suggested values of viscosity parameters found in mom_calc_visc.
1208      Many new viscosity diagnostics available.
1209    
1210    checkpoint57s_post
1211    o Add clearing-house for viscosity calculations, mom_calc_visc and
1212      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1213      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1214      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1215      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1216      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1217      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1218      ViscAhStrain and viscAhTension are now retired.
1219    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1220    o In response to JMC's bug report, genmake2 now ignores any soft-links
1221      that it finds in the *current* directory when searching for files.
1222      Soft-links found in any other source directories will still work as
1223      they did before.
1224    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1225      a C routine to unlimit the stack size
1226    o mnc-ify pkg/aim snapshot vars
1227    o mnc-ify pkg/land as requested by Daniel
1228    o various changes to mnc including:
1229      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1230      - output can now be grouped so that all files within a group
1231          change the ITER portion of their names in lock-step together
1232      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1233          and works with both EXCH1 and EXCH2 (but needs more testing)
1234      - writing works for all verification test cases w/ g77 on Linux
1235    
1236    checkpoint57r_post
1237    o make MNC variable initialization happen earlier
1238    o add diagnostics for (almost) each term of the momentum Eq.
1239    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1240    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1241    o remove MINIMAL_TAVE_OUTPUT option ;
1242      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1243    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1244      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1245    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1246    o add time-dependent SST, SSS control
1247    o cost terms in ecco/ modularized (new cost_generic.F)
1248    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1249    o new infrastructure for seaice model vs. obs misfits in seaice/
1250      * driver from the_main_loop.F is seaice_cost_driver.F
1251      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1252      * gradient check in Exp. 6a of natl_box_adjoint/
1253    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1254      (see README file)
1255    
1256    checkpoint57q_post
1257    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1258    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1259      - bug was reported by Jean-Michel and Ian Fenty
1260    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1261      update exp. cpl_aim+ocn output.
1262    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1263      Needed for high-res. runs with large global files
1264      to be able to limit tapelev size
1265    o Changed some tests for adjoint:
1266      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1267      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1268      * global_ocean.90x40x15/ back to default 3-level checkpointing
1269    o Modifications to enable scripted COMMON to MODULE conversion
1270      * verification/OpenAD/code/ has necessary scripts and description;
1271      * converts, compiles and runs successfully;
1272    
1273    checkpoint57p_post
1274    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1275    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1276      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1277    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1278    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1279      (was already the case for dissipation with mom_vecinv,
1280       and also the case for grad.PhiHyd when staggered-timeStep)
1281      This will allow to put dissipation out-off the AB time-stepping.
1282     Unfortunately, affects truncation error. Update output of exp. that "fails"
1283      (cg2d matching number) and leave the others for later: front_relax(10),
1284      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1285      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1286    
1287    checkpoint57o_post
1288    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1289      (2) its ready to be documented during the 20050801 DocFest
1290    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1291      for ideal_2D_oce and lab_sea on linux_ia32_g77
1292    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1293      in global1x1_tot/code_seaice_adj to access indices 32, 33
1294      (worth another tag)
1295    
1296    checkpoint57n_post
1297    o adding precip control xx_precip 32
1298    o adding swflux control xx_swflux 33
1299    o Replacing 10 forcing penalty cost routines by 1 generic.
1300    o Implementing partitioning in time-mean and variable adjustment
1301      for atmos. state.
1302    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1303    o in natl_box_adjoint:
1304      * updated exp 1 to 10
1305        (but does not have time-mean vs. variable split results yet)
1306    o updated global1x1/*_seaice_adj/
1307      to incorporate latest changes
1308    o enable useSingleCpuIO for mdsio vector routines
1309      (applies in particular to tapelev I/O)
1310    o removed inefficient K-loop in all active_file*control*.F
1311    
1312    checkpoint57m_post
1313    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1314      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1315    o pkg/exch2: filling of face-corner halo regions is optional
1316      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1317    
1318    checkpoint57l_post
1319     tag before updating tutorials (pre-release-2)
1320    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1321       for output and interpolation of input fields onto model grid)
1322    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1323       Affects results of exp. rotating_tank ; update output.txt.
1324    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1325          and taking the square quantity and/or using a fraction-weight field.
1326    o fix aim_diagnostics_init.F mate numbers.
1327    o add mnc output capability to diagnostics/diagstat and update
1328      our cvsignore files for the ACSII output generated
1329    
1330    checkpoint57k_post
1331    o lab_sea now uses diagnostics package and provides a suite of
1332      new EXF diagnostics output.
1333    
1334    checkpoint57j_post
1335    o exf
1336      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1337        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1338        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1339      * extended diagnostics output
1340        - now includes all EXF variables
1341        - hs, hl moved to common block
1342        - separate S/R for diagnostics, called after ctrl vector is added
1343        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1344        - EXFqnet contains true Qnet (i.e. includes qsw)
1345      * updated verif. lab_sea, global_with_exf
1346      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1347        to ensure that diagnostics sees a true EXFqnet
1348    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1349    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1350      several times with different frequencies.
1351    o mnc-ify the thsice package as requested by Daniel Enderton
1352      - the monitor--MNC output needs work
1353      - many attributes need to be added (most are currently blank)
1354    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1355      - many attributes need to be added (most are currently blank)
1356    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1357    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1358    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1359      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1360         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1361    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1362     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1363    
1364    checkpoint57i_post
1365    o Diagnostics package was changed: diagnostic allocation is now deactivated
1366      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1367    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1368      add 1rst Order upwind vertical Shear.
1369    o add a quick fix for A/B checkpointing in OFFLINE mode
1370    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1371      end-run around the C/Fortran linking horror in eesup/src/timers.F
1372    o added pkg/runclock: allows user to terminate run based on wall clock
1373    o added non-hydrostatic scaling parameter: nh_am2
1374    o pkg/my82: futile attempt to make results compiler-independent by adding
1375      some "_d 0", etc. no effect.
1376    o for mnc output, fill the 'T' coordinate var with myTime and create a
1377      separate 'iter' variable for iteration count
1378    o pkg/diagnostics:
1379      add new capability: output of Global/Regional & per-level statistics ;
1380      tested against monitor output (including land & thSIce) on various exp.
1381    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1382    
1383    checkpoint57h_done
1384      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1385      data.diagnostics, data.gchem, data.ptracers) is done.
1386    
1387    o pkg/diagnostics: prepare for Global/Regional statistics.
1388      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1389    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1390      and rename it: DIFFERENT_MULTIPLE
1391    
1392    checkpoint57h_post
1393    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1394    o pkg/diagnostics: change output frequency, now in seconds (instead
1395      of Nb of iterations). This requires to change data.diagnostics.
1396    checkpoint57h_pre
1397    
1398    o in mnc, let the user create the output dir if both mnc_outdir_date
1399      and mnc_outdir_num are false
1400    o add fflags() to pkg/diagnostics which allows one to specify, on a
1401      per-file basis, the file precision [default behavior is unchanged]
1402    o added diagnostics to pkg/kpp, including computation of mixed layer
1403      depth based on a temperature/density criterion
1404    o updated verification/natl_box to test the new pkg/kpp diagnostics
1405    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1406    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1407    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1408      not mnc -- this mistake was found by JMC and is now corrected
1409    
1410    checkpoint57g_post
1411    o add Adams-Bashforth 3rd Order time stepping:
1412      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1413      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1414    checkpoint57g_pre
1415    
1416    o make lambda[Theta,Salt]ClimRelax spatially varying
1417      (default remains spatially uniform constant based on tau)
1418    o added new control variables
1419      * init. uVel, vVel, etanN
1420      * lambda[Theta,Salt]ClimRelax
1421    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1422      (suggested by G. Forget)
1423    
1424    checkpoint57f_post
1425    o add parameter "baseTime" = model base time = time at iteration zero
1426      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1427      account for baseTime shift
1428    o move Coriolis arrays from PARAMS.h to GRID.h
1429    checkpoint57f_pre
1430    
1431    o mnc-ifying the seaice package
1432    o introduced an alternative length scale calculation for use in the limiting
1433      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1434    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1435    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1436      as well as grad(vort3).  Made it compatible with both approximate form
1437      for the cubed sphere and full form of these gradients.  Added flag
1438      useFullLeith to select between approximate and full form.  
1439    o add "d0" in getcon.F to reduce differences between compilers/platforms
1440      update output.txt of exp. fizhi-gridalt-hs
1441    o change port_rand funtion to allow to set the seed.
1442    o fix obscure MNC bug involving conversion between reals and integers
1443      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1444        new version is now more standards-compliant
1445    o adjoint-related modifications
1446      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1447      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1448      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1449    
1450    checkpoint57e_post
1451    o Adding eddy stress controls a la Ferreira et al.
1452    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1453    
1454    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1455      update output.txt of exp. fizhi-gridalt-hs
1456    o add more "Z" dimensions and associated coordinate vars to MNC
1457    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1458    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1459      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1460      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1461      months and years.  Requires pkg/cal.
1462    o diagnostics: add pickup functionality
1463      - off by default for backwards compatibility
1464      - current version only uses MDSIO -- MNC will be added
1465    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1466    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1467    
1468    checkpoint57d_post
1469    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1470    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1471      output from the diagnostics package
1472    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1473    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1474      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1475    o add coordinate variables to the MNC output from the diagnostics package
1476    o change MNC-flags default value: true when useMNC=TRUE
1477    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1478      the ability (off by default) to read the grid information using MNC
1479    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1480    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1481    o do snap-shot diagnostics at the middle of the time-interval (instead of
1482      at the end).
1483    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1484      new test for AIM with thSIce + slab-ocean
1485    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1486    o move state variable diagnostics to the beginning of the time step ;
1487      (note: still needs some work specially for snap-shot diagnostics)
1488      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1489    
1490    checkpoint57c_post
1491    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1492    o generate new output.txt files on faulks with g77 & the new -ieee option
1493    checkpoint57c_pre
1494    
1495    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1496      update output.txt of exp. global_ocean.90x40x15
1497    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1498      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1499    o add saltFlux(+File) forcing capability with periodicExternalForcing
1500    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1501    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1502    o improvements for the MNC output from DIAGNOSTICS:
1503      - correct handling of the unlimitied dimension
1504      - all dims now have associated coordinate variables
1505      - variables located at U, V, and Corner ("Z") points are now written
1506        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1507        *all* data points are output
1508    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1509    o added pkg/seaice/seaice_monitor.F
1510    o mdsio_readfield.F can now read files visible only to master MPI process.
1511    o pkg/seaice: some test code for ice-modified ocean stress
1512    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1513      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1514      spurious negative numbers for precipitation and humidity.  Will cause
1515      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1516    o pkg/ctrl/
1517      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1518        May be enabled via doPackDiag
1519      *  introduce z-scaling of
1520         + gradient (doZscalePack) and
1521         + control (doZscaleUnpack)
1522    o pkg/mdsio/
1523      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1524      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1525    
1526    checkpoint57b_post
1527    o simplify options in diagnostics_fill arguments (remove weird combinations)
1528    o fix MNC coordinate variables so that they now contain per-face index
1529      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1530      general, EXCH2 grids are only aligned to a "local" coordinate system
1531    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1532    o Implement instantaneous output within pkg diagnostics:
1533      setting a negative frequency in data.diagnostics produces
1534     "snap-shot" output (as opposed to time-average if freq > 0)
1535    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1536      NOTE: change ptracer diagnostics name: use 2 characters to work with
1537            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1538    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1539      becomes the coordinate variable for the 'T' dimension
1540    o add CF-style coordinate variables to MNC
1541      - just a first cut:  numbers are meaningless on the cubesphere and
1542        missing along the T axis but otherwise it works!
1543    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1544    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1545    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1546      this is based directly on what the model compute, so that the content of
1547      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1548    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1549    o clean up build options files for SunOS, in particular
1550      - remove -traditional from xmakedepend
1551      - change -xarch=v9 to -xarch=native for f77
1552      - restore use of make (not gmake)
1553      - add CC=gcc if using g77
1554    o changes per discussion of AM, JMC, & EH3 today:
1555      - move redundant "grid" variables out of "state" -- in preparation of
1556        creating proper CF-style coordinate variables and in recognition
1557        that any/all grid variables can be easily copied (eg. w/NCO) from
1558        the grid files into any of the other NetCDF files
1559      - *always* output grid variables with MDSIO (this will eventually be
1560        changed)
1561      - output MNC grid file if useMNC is true
1562    o every instance of _END_MASTER() has been found and replaced with
1563      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1564      preprocessors
1565    o re-arrange diagnostics pkg initialisation:
1566     - allow each package to extend the available diagnostics list
1567     - add some checking and fix small problems (multi-threaded, ...)
1568     - new S/R diagnostics_fill (replace fill_diagnostics):
1569       look through the short list of active diag. (instead of the long list)
1570       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1571    
1572    checkpoint57a_post
1573    o this set of changes restores TAMC compatibility
1574      tested for global_ocean.90x40x15 adjoint on trough
1575      (what a pain)
1576    
1577    checkpoint57a_pre
1578    o some modifs in tools/build_options for sunos
1579    o call ctrl_pack for ctrl at end for optimcycle=0
1580    
1581    checkpoint57
1582    o add horizontal bi-harmonic viscosity for vertical velocity
1583      - new parameter viscA4W (defaults to viscA4)
1584      - affects only non-hydrostatic code
1585      - to be done: no-slip lateral boundary conditions
1586    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1587    o implement Implicit Vertical advection for pTracers
1588    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1589      (implemented also for implicit vertical diffusion & advection)
1590    o OBCS: extend application of tracer open boundary conditions
1591      to a strip beyond the boundary of width Olx/Oly
1592    o add call monitor to TAF set of required calls (flow directives)
1593      and include in natl_box_adjoint
1594    o untangle a few ifdefs related to cost, ctrl, autodiff
1595      untangel a few ALLOW_ECCO_OPTIMIZATION
1596    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1597      (theta2, salt2 in ecco_cost_weights)
1598    
1599    checkpoint56c_post
1600    o OBCS as control variables
1601      - update ctrl_ad_diff.list, obcs_ad_diff.list
1602      - remove balance of obcs controls from default
1603      - fix index bug nobcs in ctrl_init
1604      - fix dummy fields filen in ctrl_pack
1605      - add dummy weights for obcs
1606    o lsopt: comment out fort.94 output
1607    o optim:
1608      - remove unnecessary header files
1609      - adjusted namelists
1610      - add xerbla.F to Makefile
1611    o exf:
1612      - multiple modifications of exf_check_range
1613      - unit change in exf_init_runoff from [m/year] to [m/s]
1614    o mdsio:
1615      - i/o-vector change debugLevel from debLevA to debLevB
1616    
1617    checkpoint56b_post
1618    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1619      is called from DO_THE_MODEL_IO
1620      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1621      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1622      - clean up PTRACERS_WRITE_TIMEAVE a little
1623    o add another verification experiment that tests both the cfc-pkg and
1624      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1625      reactive tendencies treated inline with regular timestepping
1626    o testreport previously did a lousy job of comparing small numbers, so
1627      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1628      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1629      testreport.
1630    o ptracers_monitor: bug fix for MPI
1631    
1632    checkpoint56a_post
1633    o GCHEM: finish reorganizating the package
1634      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1635        (introduces another 3D-array for each passive tracer, but only if
1636        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1637        gchemTendency is not needed because the timestep is done separately)
1638      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1639      - GCHEM is now---more or less cleanly---separate from PTRACERS
1640      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1641        so clear to me how that should be done in a general way.
1642    o CFC: improve formatting of output in CFC_ATMOS
1643    o PTRACERS:
1644      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1645        that ALL experiments with ptracers enable can be checked. This makes
1646        GCHEM_MONITOR obsolete.
1647      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1648        monitorFreq
1649      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1650    o add PTRACERS (PTR0[1-5]) to testreport output
1651    o exf_check_range:
1652      * default changed to .TRUE.
1653      * will check values for niter0 if debLevA, every timestep if debLevB
1654      * STOP in exf_check_range if 'out of range'
1655      * range chosen generous to allow for potential extema
1656      TBD: a version with stricter range
1657           permitted range would be runtime parameters
1658    o GMredi:
1659      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1660      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1661      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1662    o GCHEM:
1663      - move call to GCHEM_FORCING_SEP, so that it is now called before
1664        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1665      - introduced a useGCHEM runtime flag and applied it everywhere.
1666      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1667        this flag is now only visible within GCHEM-pkg routines.
1668      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1669        be replaced by a 3D array that is computed before thermodynamics; for
1670        this, the tracer ID iTracer had to be included into the parameter list
1671        of ptracers_forcing
1672      - set up forward_step to call gchem_forcing, that will replace
1673        gchem_forcing_int in ptracers_forcing
1674      - cleaning up
1675    o small cleaning of exch2: remove files that are also in eesupp/src
1676    
1677    checkpoint56
1678    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1679    o mnc: cleanup "full" files--fixes out-of-memory problem
1680    o ECCO-GODAE
1681      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1682      * fully merged and updated from SIO code
1683        windstress sign change affects
1684        - exf_inscal_[u/v]stress
1685        - sign of xx_tau[u/v] adjustments
1686        - signs in cost_scat
1687      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1688      * natl_box_adjoint updated and compressed
1689      * 2-level checkpoint switch added
1690        (tested in EXP. 1 of natl_box_adjoint)
1691      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1692    o SVD
1693      * first complete, non-hacked version for SVD calculations
1694      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1695        performed via direct access files admtlm_vector.it????
1696        (via ctrl_[un]pack)
1697      * optimcycle is used for ARPACK iteration counter
1698        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1699      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1700        and add linear transforms where necessary
1701      * controls are initial/final SST, SSS (can be extended; need to check
1702        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1703    o mdsio: filename info to both stderr, stdout
1704    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1705      from sign change
1706    
1707    checkpoint55j_post
1708    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1709      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1710    o add consistent build directories and .cvsignore files to verification
1711    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
1712    o make all subroutines 30 or less characters in length for certain older
1713      compilers to work (a thorough search only turns up two routines in
1714      pkg/ptracers)
1715    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
1716      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1717    
1718    checkpoint55i_post
1719    o change arrays for total vertical diffusivity (2.D if explicit,
1720      3.D if implicit) ; each ptracer uses its own background value.
1721    o added mnc/NetCDF output capability to ocn_compon_interf
1722      - added bits to verification/cpl_aim+ocn so that it can run on
1723        ITRDA and other clusters without the mpirun "-wd" option
1724    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
1725      configuration
1726    o give MNC the ability to create additional files rather than
1727      exceeding a specified file size limit "MNC_MAX_FILESIZE"
1728      - the default is just less than 2GB which is a practical limit
1729        on many systems
1730    o Compute the non-local term using either KPP vertical diffusivity (=default)
1731       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
1732    
1733    checkpoint55h_post
1734    o add verification test "vermix"
1735    o remove all the *_ioinc flags and replace with the single global
1736      outputTypesInclusive flag
1737    o allow to set a vertical profile of vertical diffusivity for T & S
1738    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
1739    o useMNC moved from data.mnc to data.pkg
1740    
1741    checkpoint55g_post
1742    o Renaming carbon AD experiments to comply with testreport conventions
1743    o Updating adjoint of Held-Suarez hs94.1x64x5
1744    o Fixing directives for non-ECCO forward_step, after ECCO directives
1745      have been fixed to avoid recomp. of do_oceanic_phys
1746      Works well for global_ocean.90x40x15,
1747      but recomp. issue remains for carbon
1748    o Updating adjoint output for natl_box_adjoint after
1749      pkg/ecco has been modified (see taga c55d_post)
1750    
1751    checkpoint55f_post
1752    o rename to timeave_init_fixed
1753    
1754    checkpoint55e_post
1755    o some delicate re-shuffle of store directives to avoid one
1756      extra call of do_oceanic_physics
1757      affects ecco_the_main_loop.F, do_oceanic_physics.F
1758      checkpoint_lev1_directives.h
1759    o NB: this may break global_ocean adjoint temporarily,
1760      but it is clear how to fix it. Will do later, need this now.
1761    
1762    checkpoint55d_post
1763    o ECCO specific cost function terms (up-to-date with 1x1 runs)
1764    o ecco_cost_weights is modified to 1x1 runs
1765    o modifs to allow observations to be read in as
1766      single file or yearly files
1767    o enable to read exf forcing fields as either
1768      single file or yearly files (flag useExfYearlyFields)
1769    checkpoint55d_pre
1770    
1771    o switch between 2-level and 3-level checkpointing
1772    o add ability of MNC to write local and "partial" (eg. 2D slices where
1773      the full 3D field is never actually stored) arrays to NetCDF files
1774      with the correct (that is, the complete multi-dimensional) set of
1775      array indicies
1776      - used in mom_vecinv() to write the diagFreq output
1777      - tested (demonstrated) in verification/aim.5l_cs
1778    o further mnc-ification
1779      - add verification/lab_sea to the list with mnc setups
1780      - fix undefined mnc v-names in cd_code
1781      - add kpp to mnc output (both snapshot and timeave)
1782    o non-hydrostatic code
1783      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
1784        in calc_gw.F
1785      - defaults to viscAh
1786      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
1787        friction or Leith) in non-hydrostatic mode, as long as there is
1788        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
1789    o pkg/cost
1790      extend simple cost functions to treat time mean quantities
1791      (T,U,V) via cost_accumulate_state from cost_tile
1792    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
1793        be 2 times larger than the minimum size the advection scheme requires.
1794        now get a perfect conservation of salt in advect_cs test-exp (updated)
1795    o GGL90 (Gaspar's TKE mixed layer)
1796      - add horizontal diffusion of TKE, requires exchanges in
1797        do_fields_blocking_exchanges, horizontal diffusivity is zero by
1798        default. In OPA there is no horizontal diffusion of TKE but the
1799        mixing coefficients are computed from a horizontal average of TKE of
1800        6 points or so. I think that diffusion has a little more physical
1801        justification.
1802      - clean up ggl90_calc in the hope of reducing memory usage (this hope
1803        was in vain)
1804      - mask tke-variable in ggl90_init
1805    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
1806    o fix biharmonic diffusion on CS-grid.
1807    o more obcs stuff
1808      - added obcs_external_fields_load as an alternative to the EXF-pkg option
1809        for reading boundary values. This routine is called from
1810        obcs_prescribe_read
1811      - updated obcs_check
1812      - changed sponge layer relaxation parameter units for days to seconds
1813      - turned off sponge layer by default
1814      - changed argument list of OBCS_CALC to myTime+deltaTclock
1815      - fixed about 35 bugs in obcs_external_fields_load
1816    
1817    checkpoint55c_post
1818    o obcs stuff
1819      - new runtime flags useOBCSprescribe, useOBCSbalance
1820      - re-arranged obcs_calc
1821      - moved exf_getobcs to obcs_prescibe_read
1822        obcs_prescibe_read is called after ORLANSKI stuff
1823        and independent of it (executable can contain all).
1824      - updated obcs_check
1825      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
1826        These may be necessary only if tangential velocities are
1827        prescribed at OB, not sure, needs testing.
1828    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
1829      which simplifies the calls and passes the ifc check-bounds test
1830    
1831    checkpoint55b_post
1832    o add a 2D scalar, Z location, exchange_2 routine.
1833    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
1834      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
1835      affects advect_cs results (for the wrong reason): update output.txt
1836    o use a more standard discretization for biharmonic viscosity ;
1837     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
1838      affects results of dome set-up: update output.txt
1839    o fix gad_advection.F (CubedSphere part), back to version 1.23
1840    o fix bug in mom_vi_del2uv.F (CubedSphere part).
1841    
1842    checkpoint55a_post
1843    o merged code to
1844      * prescribe/read time-dependent open boundaries
1845        (works in conjunction with exf, cal)
1846      * sponge layer code for open boundaries
1847      * each boundary N/S/E/W now has its own CPP option
1848        (healthy for the adjoint)
1849    
1850    checkpoint55
1851    o up-to-date adjoint of previous breaks
1852      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
1853      - global_ocean_ebm: adjoint still needs fix (TLM ok)
1854      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
1855      - carbon: * remove tr1-related adjoint verification
1856                * add ptracer as control variable
1857    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
1858      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
1859    
1860    checkpoint54f_post
1861    o in verification/carbin/ remove experiment related to
1862      ALLOW_PASSIVE_TRACER (array tr1 etc)
1863      code_ad/ input_ad/ results_ad
1864    
1865    o add two new packages
1866      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
1867        + subject to optimization (memory)
1868      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
1869        + subject to reordering (many GOTOs in the original code)
1870        + so far opps is called for every (i,j) point, and then operates in
1871          the vertical; one may want to reorder the scheme in order operate in
1872          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
1873          fields)
1874    o overhaul of IO so that we now have flags for MDSIO and/or MNC
1875      - all verification tests compile and run with linux_ia32_g77
1876      - defaults are compatible with current input files--nothing
1877        should change if you were not previously using MNC
1878      - MNC output has been added in numerous places (eg. timeave)
1879        but there are still a few writes not yet do-able with MNC
1880        (this is in progress)
1881      - flags now allow for either/or/both use of MDSIO and MNC and
1882        documentation will soon follow
1883      - numerous small formatting cleanups for ProTeX
1884    o add version info (via BUILD_INFO.h) to MNC and stdout
1885    
1886    checkpoint54e_post
1887    o add two new packages
1888      - pp81 (Packanowski and Philander, 1981), Richardson number and
1889        stratification dependent mixing
1890      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
1891      - these scheme operate in a similar manner as KPP (without ghat, of
1892        course), however there is only one diffusivity that is used for both
1893        temperature and salinity (and passive tracers)ç
1894    o add offline package
1895    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
1896      provided by Stephanie Dutkiewicz
1897    o genmake2: add ability to search for C compilers and cleanup test output
1898      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
1899    
1900    checkpoint54d_post
1901    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
1902    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
1903      leading to additional shift by 5 days each year of integration
1904       (i.e. leading to considerable offset over the years)
1905    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
1906    o start with no AB and no initial filtering (staggerTimeStep):
1907      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
1908    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
1909      (external loading & cpl import/export stay in forward_step.F)
1910    o update coupling interface to work with new staggerTimeStep
1911    o change MDSIO ptracers_pickup.
1912    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
1913    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
1914    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
1915    
1916    checkpoint54c_post
1917    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
1918      this affects (truncation error) output.txt of test-exp:
1919       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
1920    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
1921    o change Qnet to always be the net heat flux, (+upward).
1922      affects (truncation error) output of natl_box exp.: updated
1923    o define the max number of passive tracers in PTRACERS_SIZE.h
1924    o start to test mnc routinely in exp0
1925    o add sea-ice loading (sIceLoad) as a new forcing field.
1926    
1927    checkpoint54b_post
1928    o add testreport "-j JOBS" option for parallel builds (tested and pretty
1929       impressive on Altix and Opteron systems)
1930    o diagnostics can now write NetCDF files through the mnc package
1931    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
1932    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
1933    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
1934      affects (truncation error) output of lab_sea & natl_box exp.: updated
1935    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
1936    
1937    checkpoint54a_post
1938    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
1939    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
1940    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
1941    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
1942      + internal_wave (shift in writing cg2d_ini_res)
1943    checkpoint54a_pre
1944    
1945    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
1946      - modified verification/lab_sea and natl_box_adjoint accordingly
1947    
1948    checkpoint54
1949    checkpoint53g_post
1950    o prepare splitting of thermodynamics: store convect.counter in common block
1951    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
1952      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
1953    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
1954    o new parameter "nShapS": allow to treat differently S from T (nShapT)
1955    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
1956    o restore adjointability
1957    
1958    checkpoint53f_post
1959    o modifications that affect AIM experiment results (update output.txt):
1960      - no advection of S at top interface Nr (pkg/generic_advdiff)
1961      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
1962    o AIM pkg:
1963      - include stability function into surf.Flux derivative relative to Tsurf
1964      - calculate clear-sky radiation & surface temp. change (for diagnostics)
1965    
1966    checkpoint53e_post
1967    o merged cylindrical coord configuration
1968    o added rotating_tank experiment
1969    checkpoint53e_pre
1970    
1971    checkpoint53d_post
1972    o faulks upgraded: re-generate output.txt that have changed:
1973       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
1974    o Added Bryan and Lewis, 1979, vertical diffusivity profile
1975    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
1976    o added Sadourny discretization of Coriolis
1977      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
1978      - re-enabled use of omega3 (useAbsVorticity)
1979    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
1980      vector-invariant equations
1981      - note: does *NOT* yet use same variable visc. for no-slip BC's.
1982    o recoded the lateral boundary conditions for non-hydrostatic w, this time
1983      hopefully without new bugs
1984      - still to do: biharmonic friction for non-hydrostatic w
1985    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
1986    o regenerated output for global_ocean_ebm (using -ieee)
1987    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
1988      of mom_common/
1989      - simple re-arrangement of instructions within computing loop
1990    checkpoint53d_pre
1991    
1992    checkpoint53c_post
1993    o new version of coupler for AIM+thSIce and Ocean models
1994     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
1995     - land: change Evaporation of snow
1996     - aim with thSIce: fix bug in snow-precip.
1997    o changes to calc_gw.F
1998     - bug fix for w^2 term near the bottom boundary
1999     - (hopefully) improve the lateral slip boundary condtions for use with
2000        partial/looped cells
2001      - because the bug fix changes two verification experiments anyway (exp5
2002        and plume on slope), change the lateral boundary condition from half slip
2003        to the value of no_slip_sides
2004    o ebm package wasnt quite up to the parallel task. Fixed that.
2005    o Adjoint of EBM package + verification
2006      * TLM OK
2007      * ADM not sufficient accuracy yet (needs further testing)
2008    
2009    checkpoint53b_post
2010    o Commiting new energy balance model to repository
2011      * package is pkg/ebm
2012      * verif. is verification/global_ocean_ebm
2013      * references are in ebm_driver.F
2014    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2015    C        Global thermohaline circulation. Part I:
2016    C        Sensitivity to atmospheric moisture transport.
2017    C        J. Climate 12(1), 71-82
2018    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2019    C        Global thermohaline circulation. Part II:
2020    C        Sensitivity with interactive transport.
2021    C        J. Climate 12(1), 83-91
2022    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
2023    C        Destabilization of the thermohaline circulation
2024    C        by atmospheric eddy transports.
2025    C        J. Climate 7(12), 1870-1882
2026    o Will need long integration testing.
2027    checkpoint53b_pre
2028    
2029    o created pkg/mom_common in preparation for variable viscosity code
2030    o renamed and split ini_mnc_io
2031    o pkg/land: only liquid water can diffuse or run-off
2032    o AIM using land: soil wetness availability account for snow
2033    o added printMapIncludesZeros to EEPARMS namelist
2034    
2035    checkpoint53a_post
2036    o restore TAMC compatiility for exf_constants.h
2037      (no usage of _d in .h)
2038    o Additional storing in KPP in an attempt to fix
2039      TAMC problem with adjoint of KPP code.
2040      (no success...)
2041      Identical code works fine with TAF.
2042    o Fixed verification/natl_box_adjoint experiments.
2043      Initial conditions for Experiments 4 and 5 are now
2044      set to "SEAICE_initialHEFF=0", which is more reasonable,
2045      and hence gives results closer to that of Experiment 2.
2046      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
2047    
2048    checkpoint53
2049    o stable checkpoint with up to date adjoint
2050      TLM tests only run for 1st grdchk at the moment. Its unclear if
2051      this is a code problem or a problem with resetting code for g_
2052      variables that is being autogenerated wrong.
2053      Otherwise:
2054       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
2055       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
2056         are both still in chaos following their security messes.
2057    
2058    checkpoint52n_post
2059    o various build (mostly genmake2) changes including:
2060      - ability to build/run more easily within Cygwin and MacOS X
2061      - more complicated Makefiles with a stronger dependence on Gnu Make
2062    o pkg/seaice modifications
2063      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
2064        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
2065        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
2066      - changed proxy for geostrophic velocity and updated
2067        verification/lab_sea/results/* accordingly
2068      - removed ADI dynamic solver from pkg/seaice
2069      - replaced all occurrences of 1/CSTICE or 1/CSUICE
2070        they caused a segmentation fault under certain circumstances
2071      - removed unused field WATR
2072    o bug fix in exf-package:
2073      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
2074         now reflect that.
2075    o small fixes in the cal-package:
2076      - set reference date to first of January for the 'model'-calendar
2077      - failing of cal_CheckDate in cal_FullDate now actually results in a
2078        warning
2079    o small modifications in exf-package to increase flexibility:
2080      - change climtempfreeze from a constant to a runtime parameter that
2081        is specified in data.exf_clim (default = -1.9)
2082      - introduce runtime parameter windstressmax (default = 2.0) that is
2083        specified in data.exf
2084    o fix in pkg/thsice:
2085      - update Evap (Tsf changes) to be consistent with Latent heat flux
2086      - maintain snow precipitation unchanged (even if Tsf >=0).
2087     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
2088    
2089    checkpoint52m_post
2090    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
2091      this does not change any of the results, because myIter=0 in swfrac always
2092      lead to jwtype=2 (the default anyway), but the call makes little sense
2093      as a default
2094    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
2095    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
2096      atmospheric model (AIM) to use it ; add a "slab ocean" component.
2097    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
2098    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
2099    o extending useSingleCpuIO option to work with new exch2 I/O format
2100      - old-style, missing-tile I/O is still accessible by defining CPP
2101        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
2102    o monitor package can write to NetCDF files and/or STDOUT
2103    o fix re-definition bug in MNC_GRID_INIT_ALL()
2104    o doc/api_reference added
2105      - a framework for building an API Reference Manual using all
2106        the "protex" comments embedded in the code
2107      - see pkg/generic_advdiff, pkg/mnc for examples
2108    o MNC:
2109      - make myThid the last argument for all subroutines
2110      - new default for the grid files: NO halos
2111      - add useMNC and other run-time flags
2112      - separate per-file-group handling of the unlimited dimension
2113      - early initialization of MNC w/ flags read at the eeboot stage
2114        and lookup tables set in initialize_fixed
2115      - write all MNC output to a freshly-created directory
2116    o thermodynamics sea-ice (thsice) is now tested with testreport.
2117    o test exp. advect_cs: use the standard cs32 grid ; update output.
2118    o Added functionality to grdchk:
2119      pick global i,j,k position (or nearest wet) where to perform check.
2120    
2121    checkpoint52l_post
2122    o new land formulation:
2123      a) use ground enthalpy as prognostic variable to ensure exact
2124         energy conservation.
2125      b) account for water temperature and for latent heat of freezing
2126         in all processes (rain, run-off, ground storage)
2127      c) compute surface and ground temperature implicitly.
2128    o aim_v23 modification for new land model:
2129      a) Treat separately land / ocean / sea-ice surface fluxes
2130         to allow implicit computation of land & sea-ice surface temp.
2131      b) add snow precipitation.
2132    checkpoint52l_pre
2133    
2134    o fix problem (when 1 tile is empty) in min/max monitor.
2135    o fix bug in timeAve (u,vZetatave in common block)
2136    o no restoring terms under ice for pkg/seaice
2137    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
2138    o bug fix for pkg/seaice pickups
2139    o change MNC call locations and add coordinate attributes
2140    o mask vorticity at the corner ; affects global_ocean.cs output
2141    o fix ini_curvilinear_grid ; test CS experiments with mpi
2142    o aim.5l_cs: modify sea-ice fraction input file ; update output
2143    o exf: Adding simple range check routine for exf fields after read
2144    
2145    checkpoint52k_post
2146    o removed top-level directory "diags"
2147      - we migrated these functions to pkg/timeave a long time ago
2148    o fixed bug introduced in pkg/monitor
2149    o accuracy ctrlprec = 32 insuffient for gradient checks using
2150      averaged fields (I/O via cost_averages)
2151      -> use ctrl.h in active_file*.F to control I/O precision.
2152    o paramter list of CALL ADTHE_MAIN_LOOP
2153    o added initial do_the_model_io to ecco
2154    o set all ...Freq to zero after cost_final
2155      taveFreq, dumpFreq, pChkptFreq
2156    o MAIN and ECCO differentiability restored
2157    
2158    checkpoint52j_post
2159    o fix nchklev in tamc.h for global_ocean...
2160    o Bringing flow and store directives up-to-date
2161    o Really weird thing!
2162      call do_the_model_io from the_main_loop with parameters
2163      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
2164      TAF places a faulty re-call of initialise_varia
2165      after cost_final call which should not be there!
2166    checkpoint52j_pre
2167    
2168    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
2169      error messages
2170    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
2171    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
2172      debug output
2173    o modfied mdsio_writefield.F to handle non-global files under exch2
2174    o update AIM Cubed-Sphere exp (aim.5l_cs):
2175      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
2176    o update AIM Equatorial Channel exp:
2177      use standard aim_v23 pkg and change the SST fields to be more realistic.
2178    o globalFile now works with exch2
2179    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
2180      mon_vort3.F to make exch2 friendly with >1 tile per cube face
2181    o limit timeave output for hi-res integrations
2182    
2183    checkpoint52i_post
2184    o removed CPP_EEOPTIONS.h from verification/*/code
2185    o updated the tiling for global_ocean_pressure
2186    checkpoint52i_pre
2187    
2188    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
2189      the old pkg/aim).
2190    
2191    checkpoint52h_pre
2192    o shortened offending lines in exch2_send_rx?.template
2193    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
2194    o genmake2: add build & execute test for NetCDF code
2195    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
2196      old grid files, moved CPP_EEMACROS.h to pkg/exch2
2197    o added useSingleCPUIO flag to monitor.F and mon_out.F
2198    o added temporary hack for sea-ice dynamics on the cube:
2199      metric terms are ignored and it is assumed that
2200      there is no sea-ice on cube faces 1, 2, 4, and 5.
2201    
2202    checkpoint52f_post
2203    o added exch2 cube routines to pkg/exch2
2204    o modified hs94.cs-32x32x5 to use it
2205    o added new grid files to hs94.cs-32x32x5
2206    checkpoint52f_pre
2207    
2208    checkpoint52e_post
2209    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
2210      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
2211    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
2212      to work with implicit vertical advection and AB ;
2213    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
2214    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
2215     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
2216    checkpoint52e_pre
2217    
2218    o fix bug in impldiff when Nr=1 or Nr=2.
2219    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
2220    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
2221    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
2222      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
2223    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
2224    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
2225    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
2226    
2227    checkpoint52d_post
2228    o re-tiled many expts to allow comparison in multi-processor mode
2229      - updated output accordingly
2230      - changed hs94.128x64x5 to use intial T from file rather than use the
2231        random number generator
2232    o add infrastructure in model routines for fizhi and gridalt packages
2233    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
2234    o changes to permit hi-res, cubed-sphere, configuration
2235      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
2236      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
2237      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
2238        of surface winds for the cube
2239      (A verification experiment, based on global_ocean.cs32x15, but with
2240       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
2241       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
2242       complete with example surface forcing files and matlab scripts to look
2243       at the output and compare it with that of global_ocean.cs32x15.)
2244    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
2245       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
2246       to conform to the common rule.
2247    o check-in the first version of the coupler + interfaces for multi-components
2248       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
2249       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
2250       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
2251       - ocean and atmos. share the same horizontal grid (no interpolation).
2252       - exchanges between component and coupler is done in forward_step
2253    o new verification experiment, cpl_aim+ocn:
2254       coupled ocean - AIM atmosphere on cs32 grid.
2255    
2256    checkpoint52d_pre
2257    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
2258    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2259    
2260    checkpoint52c_post
2261    o Fixing OPTIONS files for use of exf:
2262      - ALLOW_ECCO not needed
2263      - ECCO_CPPOPTIONS.h should not be included from
2264        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2265        as has been the case in the past
2266      - All cal/exf related options are currently set in
2267        single header file. Should remain so until we
2268        agree on a consistent new policy.
2269    o Removed all CPP options for cal package.
2270      cal has no more CPP options.
2271    o modified STOREs in GAD_ADVECTION
2272    o corrected key comp. for passkey
2273    
2274    checkpoint52b_post
2275    o new version: "thsice" of thermodynamic sea-ice pkg:
2276     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2277     - modify fluxes but do not change theta directly;
2278     - light cleaning of bulk_force pkg (still needed with thsice).
2279     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2280       + output_thsice.txt to test thsice & bulk_force pkgs.
2281    o put back grid & coriolis monitor output.
2282    checkpoint52b_pre
2283    
2284    o call "do_the_model_io" at the beginning (=> dump initial state)
2285    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2286    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2287      (need info on NUMBER_OF_PTRACERS)
2288    o missing PTRACERS headers in some routines
2289    o default tamc.h in pkg/autodiff supposed to crash
2290      to ensure proper customization
2291    
2292    checkpoint52a_post
2293    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2294      - moved surfaceTendencyTice from pkg/seaice to main code
2295      - subroutine FREEZE_SURFACE now limits only surface temperature
2296        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2297        => new output.txt for global_ocean.cs32x15 & global_with_exf
2298      - keep the old version of FREEZE for backward compatibility;
2299        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2300      - corresponding modifs for TAF directives
2301    o added surface flux output variables to TIMEAVE_STATVARS
2302    o time-averaged output for pkg/ptracers
2303    o fix problem with ECCO-related divided adjoint
2304      snapshot file was missing some ad-variables,
2305      but no warning issued by TAF
2306    
2307    checkpoint52a_pre
2308    o some bug fixes for #undef REAL4_IS_SLOW
2309    
2310    checkpoint52 = ecco_c52_e35
2311    o after testing adjoints of checkpoint51u_post
2312    
2313    checkpoint51u_post
2314    o this is the post-merge tag of the ecco-branch
2315      (needs another clean checkout and re-testing)
2316    o various natl_box_adjoint configs and results
2317      but no input fields
2318    o obcs adjoint not yet merged!
2319    o adding ECCO global 1x1 and 2x2 degree configs
2320    o updated/extended some store directives for seaice
2321    o pkg/ecco now containes ecco-specific part of cost function
2322    o top level routines the_main_loop, forward_step
2323      supersede those in model/src/
2324      previous input data.cost now in data.ecco
2325      (new namelist ecco_cost_nml)
2326    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2327    
2328    checkpoint51t_post
2329    o this is the pre-merge tag of the ecco-branch
2330    
2331    checkpoint51s_post
2332    o cleanup: removed various obsolete #define-s
2333    o pkg/grdchk
2334      - renamed 'ph-grd 3' to 'grad-res'
2335      - merged from ecco-branch
2336        (remaining bug fixes for obcs gradient checks)
2337      - additional high-precision output for testreport
2338        (grep for 'precision_grdchk_result')
2339    
2340    checkpoint51r_post
2341    o cleaned up or removed CPP_OPTIONS.h files
2342    o updated results for some of the tests to reflect the new
2343      optfiles (-ieee: -O0 instead of -O3)
2344    
2345    checkpoint51q_post
2346    o cd_code:
2347      - moved cd_scheme.F -> cd_code_scheme.F
2348      - separate read_checkpoint from cd_code_ini_vars.F
2349      - separated cd_code part from write_checkpoint
2350      - updated AD_SOURCE, generated .flow
2351      - added CD_CODE_VARS.h to the_main_loop
2352      - Moving cd_code specific store dir.s to pkg/cd_code
2353    o ctrl package totally restructured
2354      - pack/unpack now optional and decoupled from
2355        xx_/adxx_ I/O
2356      - ctrl_pack/unpack cleaned
2357        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2358      - confined inclusion of AD_CONFIG.h to where necessary.
2359    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2360    
2361    checkpoint51p_post
2362    o create initial cd_code package
2363      - WARNING: the initialization of fields within packages
2364        is broken because INI_FIELDS (where READ_CHECKPOINT is
2365        called) is called *before* PACKAGES_INIT_VARIABLES.
2366        This seems to be backwards since
2367        1) its important to initially zero the entire field including
2368           the "halo" region
2369        2) zeroing needs to be done *before* reading pickup info
2370           and the pickup call might or might not happen in any
2371           particular run
2372      - this needs an overhaul for R2
2373    o cleanup verification/*/code/GMREDI_OPTIONS.h
2374    o cleanup testreport
2375    
2376    checkpoint51o_post
2377    o bringing AD-related verif's up to date with genmake2
2378      - carbon/
2379      - global_ocean.90x40x15/
2380      - hs.94.1x64x5/
2381      - (front_relax/ )
2382    o (more) consistent directory structure for AD-related verif.'s
2383    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2384    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2385    o bug fix in find_alpha.F for MDJWF:
2386      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2387        change rho -> rho-rhoConst
2388      - replace call find_rho to find_rhonum
2389    o initialisation of rFlx extended to full array (required by TAF)
2390      and shifted to thermodynamics
2391    o removed PTRACERS.h in ptracers routine
2392    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2393    o Correcting initialisations for fVerU, fVerV.
2394    o helping TAF to recognize dependency on kUp for
2395      fVerU, fVerV
2396    o Replacing delZ by delR in pkg/ctrl/
2397    checkpoint51o_pre
2398    
2399    o undid all of cp51 pending some cleanups and discussion
2400    o added the [#include "AD_CONFIG.h"] statement to all files that need
2401       it for adjoint/tl #defines
2402     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2403     o removed tools/genmake since it no longer works
2404    
2405    checkpoint51n_post
2406    o modifications to make FREEZE flux visible to pkg/kpp
2407      - moved surfaceTendencyTice from pkg/seaice to main code
2408      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2409      - subroutine FREEZE now limits only surface temperature
2410        (this means new output.txt for global_ocean.90x40x15,
2411         global_ocean.cs32x15, and global_with_exf)
2412    o added surface flux output variables to TIMEAVE_STATVARS
2413    
2414    checkpoint51n_pre
2415    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2416    o added [#include "AD_CONFIG.h"] to all files that use the following
2417      defines:
2418      - ALLOW_ADJOINT_RUN
2419      - ALLOW_TANGENTLINEAR_RUN
2420      - ALLOW_ECCO_OPTIMIZATION
2421    
2422    checkpoint51m_post
2423    o incorporating changes to get TAMC/TAF working in genmake2
2424      - added new TAMC/TAF targets to the Makefile
2425      - various cleanups related to package handling
2426      - these changes should have no impact on the forward model
2427    
2428    checkpoint51l_post
2429    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2430     - faster algorithm for cal_addtime.F
2431     - higher precision arithmetic, where needed
2432     - pkg/exf *startdate variables changed from calendar date to
2433       model integration time
2434    
2435    checkpoint51l_pre
2436    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2437    o enable to apply restoring on S & T only in a latitude band.
2438    o update output (external_forcing_surf modif. change truncation errors)
2439       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2440    
2441    checkpoint51k_post
2442    o change default to: useNHMTerms=.FALSE.
2443     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2444       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2445     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2446        exp1, ideal_2D_oce
2447     - change data file of oceanic exp (leave the results unchanged for now)
2448       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2449    o set gravitySign automatically according to the vertical coordinate used
2450      (and change sign: back to "logical" value: +1 when R increases downward)
2451    o added an include barrier to the default CPP_OPTIONS.h and
2452      removed the #include "PACKAGES_CONFIG.h" from it
2453    o fix a bug in mom_fluxform (from chk51j_post)
2454    
2455    checkpoint51j_post
2456    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2457    o adjusted some flow directives (dynamics, thermodynamics)
2458    o added cubed-sphere case to test cost function
2459    o heckpoint_lev?_directives.h now include
2460      pkg-specific directives, whenever those are enabled.
2461    o Moving pkg-specific flow directives to corresponding pkg
2462      Moving pkg-specific differentiation list to corresponding pkg
2463      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2464      ---> conventions are
2465           - pkg_ad.flow
2466           - pkg_ad_diff.list
2467           - pkg_ad_check_lev?_dir.h
2468    
2469    checkpoint51i_post
2470    o merge of the branch-genmake2
2471      - knowingly breaks the older genmake
2472      - automatic generation of all ALLOW_${PKG_NAME} defines
2473      - new testreport supersedes older testscript
2474    o large number of package inclusion and header cleanups
2475    checkpoint51i_pre
2476    
2477    o new output for adjoin of global ocean vector invariant
2478    o fix for checkpoint of thermodynamic seaice and bulk_force
2479    o Steph gchem various cleanups
2480    
2481    checkpoint 51h_pre
2482    o fixed some single quotes
2483    o modify gchem pkg to be more versatile
2484    o modifications to clean up dic pkg
2485    o add pkg/cfc
2486    
2487    checkpoint51g_post
2488    o provide links for ARPACK and ADM*TLM
2489    o start removing verification/vero/
2490    o update AD-related stuff
2491      (in particular some IF-statements in model/src/ routines)
2492    o adding to verification/global_ocean.90x40x15/ adjoint of
2493      vector invariant setup
2494    
2495    checkpoint51f_post
2496    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2497    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2498      of tracer Green's fucntions for ocean inversion project.
2499    
2500    checkpoint51f_pre
2501    o Added on-the-fly spatial interpolation capability
2502        "USE_EXF_INTERPOLATION" to pkg/exf.
2503      - This is a temporary Cartesian-grid hack until
2504        the super-duper ESMF coupler becomes available.
2505      - See verification/global_with_exf/README for usage example.
2506      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2507        flags and modified pkg/seaice accordingly.
2508    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2509        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2510        non-local transport term.
2511    
2512    checkpoint51e_post
2513    o pkg/mom_vecinv:
2514      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2515      - add time-ave diagnostic of vorticity advection.
2516    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2517    o atmospheric geopotential: - include water vapor effect;
2518                                - use p^kappa in p* scaling.
2519    o land pkg: read initial state from files.
2520    o AIM : add stratospheric drag in the upper level
2521    
2522    checkpoint51d_post
2523    o change function ILNBLNK (=> last non-blank char.) to return zero
2524      (instead of the string length) when the string. char is empty
2525    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2526    o modif's to restore TAMC compatibility
2527      - avoid "_d" constructs in PARAMETER declarations
2528      - avoid interrupting lines by comment lines
2529    o Use cluster local disks for purely local I/O
2530      vs. globally visible disks needed for ctrl stuff
2531      (merged from ecco-branch)
2532      - new active_file_loc... and mdsio_..._loc routines
2533      - affected packages: autodiff, ctrl, grdchk, mdsio
2534    
2535    checkpoint51c_post
2536    o introducing integer flag debugLevel
2537      - debLevZero: suppress all output
2538      - debLevA: standard
2539      - debLevB: equivalent to current debugMode=.TRUE.
2540    o introducing pathname variable mdsioLocalDir for mdsio
2541      that can be specified at runtime
2542      (relevant for cluster I/O to local disk)
2543    `
2544    >>>checkpoint51b_post
2545    adjoint of ptracers
2546    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2547    o extended state in checkpoint_lev?, etc.
2548    o alternative ctrl/cost with tr1 or ptracer
2549    o new comlev1_bibj_ptracers
2550    o new ptracers.flow
2551    o made ptracers_forcing same as external_forcing_s
2552    o added verification for adjoint with ptracers
2553      - adm. grdchk fail so far
2554      - tlm. grdchk OK
2555      - checked tapelev/comlev recomputations: OK
2556    <<<checkpoint51b_pre
2557    
2558    checkpoint51a_post
2559    o added code for biogeochemistry package
2560      - new pkgs: dic, gchem
2561      - new subroutine in ptracers
2562    o modify code for biogeo packages
2563      - in model/src and pkg/ptracers
2564    
2565    checkpoint51
2566    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2567      - autodiff, ctrl, exf, grdchk, seaice
2568      kept separate packages
2569      - cost, ecco, obcs
2570    o updating verification/internal_wave, verification/lab_sea
2571      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2572    
2573    checkpoint50i_post
2574    o Preparing next differentiable checkpoint and sync
2575      of MAIN vs. ecco-branch
2576      - 1st step: this one is differentiable
2577      - 2nd step: next(! not this) checkpoint will have updated packages
2578                  from ecco-branch)
2579    
2580    checkpoint50h_post
2581    o new package "land": provide surface BC for AIM.
2582    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2583    o AIM: use true log-P extrapolation for near surface temp (= as in
2584        F.Molteni paper) ; update aim.5l_cs output.
2585    o New variable in PARM03 for more flexible pickups
2586    o somewhat cleaned package initialisation sequence for
2587      ctrl/ cost/ ecco/ in packages_... routines
2588    
2589    checkpoint50g_post
2590    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2591      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2592      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2593        made the default because of faster convergence than ADI
2594    
2595    checkpoint50f_post
2596    o exf totally restructured
2597      - replaced all exf_set_ routines by one generic exf_set_gen.F
2598        and made sure it's still differentiable
2599      - split exf_getffields.F into new exf_bulkformulae.F
2600      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2601      - updated adjoint/makefile and relevant verif. accordingly
2602    
2603    checkpoint50f_pre
2604     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2605          + change Evap over land. (update aim.5l_cs output)
2606     o added missing .cvsignores and made uniform across expts
2607     o changed configuration of tidal_basin_2d expt
2608     o added pkg/debug functions for tracing code in fatal crashes
2609     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2610     o new fn in pkg/monitor to stop model if solution grows too big
2611     o removed lots of single quotes from comments
2612    
2613    checkpoint50e_post
2614    o make KPP work with PTRACERS
2615     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2616       nearly a copy of kpp_transport_s
2617     - there is no analogue to SurfaceTendencyS, so I have to use
2618       gPtr(of the surface layer) instead
2619    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2620    checkpoint50e_pre
2621    
2622    checkpoint50d_post
2623    o change kpp output from multiple-record state files to single-record state
2624      files analogous to write_state.F
2625    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2626      analogous to the cg2d-related output.
2627    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2628      so that writing to internal file fn (with length 512) fails.
2629    checkpoint50d_pre
2630    
2631    checkpoint50c_post
2632    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2633    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2634    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2635    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2636    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2637    
2638    checkpoint50c_pre
2639    Merging from release1_p13:
2640    o bug fix for pkg/seaice dynamic solver
2641    o Added SEAICE_initialHEFF to pkg/seaice
2642    
2643    checkpoint50b_post
2644    o store u*,v* in gU,V instead of in guNm1,gvNm1
2645    o in order to put the momForcing out of the Adams-Bashforth:
2646      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2647      to timestep.F
2648    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2649    o re-generate output for highly sensitive test-exp:
2650       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2651    
2652    checkpoint50b_pre
2653    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2654    o corrected CPP option mismatch in exf_Bulk... functions for case
2655      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2656    
2657    checkpoint50a_post
2658    o Bug fix for merging between c50 and KPP.
2659      ikey was passed from thermodynamics to kpp_calc via
2660      common block rather than being recomputed in kpp_calc,
2661      in contradiction with new key itdkey.
2662      New key ikppkey created, and tamc.h headers updated.
2663    
2664    checkpoint50
2665    - 2nd step of merge with ecco-branch:
2666      merge changes in ecco-branch back into main trunk
2667    - bug fix in find_alpha
2668    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2669    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2670    - merged some sliced AD support routines
2671    
2672    checkpoint49
2673    merged from ecco-branch:
2674    o exf:
2675      - Enable initialisation of forcing fields to constant
2676        (runtime) values.
2677      - in exf_getffields.F
2678        Reduce i-/j-loop to interior domain, discarding overlaps.
2679        That also fixes wrong TAF-key computations for key_1, key_2
2680        with bulf formulae.
2681      - exf_init.F modify #ifdef for exf_init_evap
2682      - exf_getffieldrec.F, ctrl_getrec.F
2683        The following INT-usages are not safe:
2684          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2685          fldcount = int(fldsecs/fldperiod) + 1
2686        and were modified.
2687    o autodiff: checkpoint_lev...
2688      - updated storing for bulk formulae (some arrays were missing)
2689      - added state for seaice package
2690      - synchronized with main branch
2691    o DIVA:
2692      Modif.s in
2693      - the_main_loop.F
2694      - the_model_main.F
2695      and added cost_final_restore.F cost_final_store.F
2696      o With these changes, it is possible to fully separate
2697        the first forward run to compute the cost function (mdthe_main_loop)
2698        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2699        into separate model executions.
2700        This enables better tuning of DIVA to given queue sizes.
2701      o Loss of cost function value in consecutive DIVA runs is
2702        fixed by storing to 'costfinal' file.
2703      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2704        beginning/end of adjoint integration is accounted for.
2705      The current changes apply to TAF-1.4.26.
2706      TAF has one remaining bug, requiring one manual change
2707      (see MITgcm manual).
2708    o cal: synchronized between MAIN and ecco-branch
2709    
2710    checkpoint48i_post
2711    o Changes to restore differentiability of code w.r.t. previous tag
2712      (mostly adding new routines to make list and replacing
2713      pressure by totPhiHyd).
2714    o Updated and merged grdchk package
2715      - has both ADM and TLM checks
2716      - works for single- and multi-proc.
2717      - output cleaned
2718      - worked successfully for parallel DIVA
2719    o genmake:
2720      - Adding -platform=SP4
2721      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
2722    o Modif. for DIVA:
2723      ctrl_unpack should not be called in intermediate DIVA interval.
2724      (similar thing would apply for active files such as
2725      tbar, sbar, psbar, which should not be reinitialised;
2726      only relevant for ecco-branch)
2727    
2728    checkpoint48h_post
2729    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
2730    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
2731    o Added SEAICE_initialHEFF to pkg/seaice
2732    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
2733    
2734    checkpoint48g_post
2735    --- EOS:
2736    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
2737      store total Potential in totPhyHyd for diagnostics & EOS.
2738    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
2739    --- Pressure/geopotential gradient:
2740    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
2741    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
2742      ( changes results of global_ocean_pressure )
2743    o NLFS + z-coord.: add eta*Rho' contribution.
2744    o accurate phiHyd when using interface-W at the middle between 2 centers
2745     ( changes results of ideal_2D_oce )
2746    o includes r* 2nd term in potential gradient.
2747    
2748    checkpoint48f_post
2749    Merging from release1_p12:
2750    o Modifications for using pkg/exf with pkg/seaice
2751      - improved description of the various forcing configurations
2752      - added basic radiation bulk formulae to pkg/exf
2753      - units/sign fix for evap computation in exf_getffields.F
2754      - updated verification/global_with_exf/results/output.txt
2755    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
2756      (SBO) core products, including oceanic mass, center-of-mass,
2757      angular, and bottom pressure (see pkg/sbo/README.sbo).
2758    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
2759      to avoid negative values in shallow regions.
2760      - updated verification/natl_box/results/output.txt
2761      - updated verification/lab_sea/results/output.txt
2762    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
2763    o Added useSingleCpuIO option (see PARAMS.h).
2764    o Updated useSingleCpuIO option in mdsio_writefield.F to
2765      work with multi-field files, e.g., for single-file pickup.
2766    o pkg/seaice:
2767      - bug fix in growth.F: QNET for no shortwave case
2768      - added HeffFile for specifying initial sea-ice thickness
2769      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
2770    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
2771      kpp_transport_t.F, forward_step.F, and the_main_loop.F
2772    o pkg/seaice:
2773      - adjoint-friendly modifications
2774      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
2775    
2776    checkpoint48e_post
2777    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
2778    o dynamics: change definition of computational domain & adapt mom_fluxform
2779      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
2780    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
2781        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
2782        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
2783        global_ocean.90x40x15 global_with_exf global_ocean_pressure
2784        inverted_barometer solid-body.cs-32x32x1
2785      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
2786    
2787    checkpoint48d_post
2788    o in preparation for r*:
2789     a) use pre-computed gradient of hydrostatic potential:
2790        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
2791     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
2792        => affects results of glob_oce_pressure (different truncation error)  
2793      update output.txt of ideal_2D_oce & global_ocean_pressure
2794    
2795    checkpoint48d_pre
2796    o in preparation for r*:
2797      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
2798      pass the 2 comp. of the grad. as arguments to momentum S/R.
2799      but for the moment, only used if it does not change the results.
2800    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
2801    
2802    checkpoint48c_post
2803    Modifications in treatment of initial flux forcing controls
2804    to avoid extra storing of flux fields.
2805    
2806    checkpoint48c_pre
2807    o Added tidal_basin_2d experiment (currently 1D!)
2808    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
2809    
2810    checkpoint48b_post
2811    o r* coordinate added in #ifdef NONLIN_FRSURF block.
2812     (modification to pressure gradient not yet implemented)
2813    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
2814      (for U & V) that are used for vertical advection of momentum.
2815    
2816    checkpoint48a_post
2817    o In preparation for r*, use temp. array to compute vertical transport
2818       in flux-form momentum pkg. => change results of few test-exp.
2819      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
2820                        lab_sea, natl_box & plume_on_slope
2821    
2822    checkpoint48
2823    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
2824    
2825    checkpoint47j_post
2826    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
2827    o moved adexch from forward_step to addummy_in_stepping
2828    o added exch in ctrl_map_...
2829    o aveFreq.=0. at end of cost_final to avoid overwrite in
2830      reverse checkpointing loop
2831    o Yet more changes in gmredi:
2832      * adgmredi_calc_tensor
2833        avoiding all recomputation of gmredi_slope_limit
2834      * adgmredi_x/y/rtransport
2835        added flag for excessive storing to avoid recomp. of
2836        u/v/rtans, dTdx/y/z
2837        -> this is not really necessary and very memory-consuming
2838      * adgmredi_slope_psi:
2839        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
2840      * gmredi_slope_limit
2841        re-activated full calculation of taperfct for case 'ac02'
2842    o updating verification/ adjoints of carbon, global_ocean.90x40x15
2843    
2844    checkpoint47i_post
2845    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
2846    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
2847      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
2848    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
2849    o gmredi: fix few bugs.
2850    
2851    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
2852    This will be a good checkpoint to plug into the ecco-branch.
2853    o few modif.'s to get latest version adjointed
2854      (mainly kick out code in ini_linear_phisurf)
2855    o modif's to run adjoint with exactConserv
2856    o case GM_BOLUS_ADVEC should be cleaned
2857      S/R gmredi_slope_psi should be cleaned
2858    o verification/carbon now has exactConserv=.TRUE.
2859    
2860    checkpoint47g_post
2861    o time-average AIM output: becomes independent from statvars time-average
2862      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
2863    o After TAF bug fix:
2864      Tested adjoint of gmredi package.
2865      Tests were done with checkpoint47 rather than with latest
2866      checkpoint47f_post since the latter is broken for the adjoint
2867      verification/carbon/ contains both ADM and TLM gradient checks.
2868    Here they are, before they get changed/lost/stolen.
2869    Mostly modif.'s to fix numerical sensitivities.
2870    Gradient checks OK for
2871    - GM_taper_scheme:
2872      * clipping
2873      * ac02
2874      * linear
2875      * glw91
2876      * dm95
2877      * ldd97
2878    - GMREDI_OPTIONS:
2879      * GM_VISBECK_VARIABLE_K
2880      * GM_NON_UNITY_DIAGONAL
2881      * GM_EXTRA_DIAGONAL
2882      * GM_BOLUS_ADVEC
2883    in conjunction with data.gmredi parameters to be checked in
2884    in a few minutes under verification/carbon/code/
2885    
2886    checkpoint47f_post
2887    Merging from release1_p10:
2888    o modifications for using pkg/exf with pkg/seaice
2889      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
2890        and SEAICE_EXTERNAL_FLUXES
2891      - pkg/exf CPP options EXF_READ_EVAP and
2892        EXF_NO_BULK_COMPUTATIONS
2893      - usage examples are Experiments 8 and 9 in
2894        verification/lab_sea/README
2895      - verification/lab_sea default experiment now uses
2896        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
2897    
2898    checkpoint47e_post
2899    o created a tag prior to creating a branch
2900    
2901    checkpoint47d_post
2902    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
2903      at the bottom boundary had an erroneous half slip boundary condition
2904    o added bottom drag and no slip boundary condition capabilities to
2905      oceanic pressure coordinates code
2906    o added new verification experiment global_ocean_pressure, this experiment is
2907      also described in the tutorial section of the manual
2908    checkpoint47d_pre
2909    
2910    checkpoint47c_post
2911    o Added a verification experiment for a global cubed-sphere ocean run
2912      -  verification/global_ocean.cubed32x32x30
2913      -  uses pkg/therm_seaice and pkg/bulk_forcing
2914    
2915    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
2916    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
2917      when using P-coordinate; only implemented for atmospheric config.
2918    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
2919      NOTES: requires option NONLIN_FRSURF to be "#define".
2920    o update advect_xz/results/output.txt (left from checkpoint44g_post)
2921    
2922    checkpoint47b_post
2923    Merging from release1_p9:
2924    o pkg/seaice
2925      - removed GOTO's and added taf directives
2926      - double precision constants to reduce the g77 (Linux)
2927        to F77 (SGI) differences reported in release1_p8
2928    o tools/genmake
2929      - added SGI options
2930    o verification/testscript
2931      - updated to that of checkpoint47a_post
2932    o verification/global_ocean.90x40x15/input/eedata
2933      - modified for SGI f77 compatibility
2934    o verification/lab_sea
2935      - added description of sea-ice model
2936      - added missing matlab routines
2937      - added test of thermodynamics parallelization
2938    
2939    checkpoint47a_post
2940    o new pkg: aim_v23
2941     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
2942       for now, keep the same surface forcing as before.
2943     - Part-Cell implemented into AIM; check that Heat & Water are conserved
2944     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
2945     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
2946    o add diagnostic of surface correction term in monitor output
2947    
2948    o bulk_force and therm_seaice
2949    - Two packages:  bulk_force (Bulk forcing)
2950      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
2951    - Earlier integration from Stephaine Dutkiewicz
2952      and Patrick Heimbach.
2953    - Two ifdef statements for compile time,
2954       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
2955    
2956    checkpoint47
2957    differentiable version of checkpoint46n_post
2958    o bug fix in quasihydrostaticterms
2959    o * "clean" adjoint code (in terms of extensive recomputations)
2960        can now be obtained for all GMREDI options (i.e. for
2961        - GM_VISBECK_VARIABLE_K
2962        - GM_NON_UNITY_DIAGONAL
2963        - GM_EXTRA_DIAGONAL
2964        - GM_BOLUS_ADVEC )
2965      * However, wrong gradient check problem remains unsolved.
2966      * New CPP options have been introduced for different
2967        tapering schemes
2968    o external_fields_load now part of differentiation list
2969    o pressure needs multiple storing;
2970      would be nice to have store_pressure at beginning or
2971      end of forward_step, e.g. by having phiHyd global (5-dim.)
2972      (NB: pressure is needed for certain cases in find_rho,
2973      which is also invoked through convective_adjustment).
2974    o recomputations in find_rho for cases
2975     'JMD95'/'UNESCO' or 'MDJWF' are OK.
2976    o #define ATMOSPHERIC_LOADING should be differentiable
2977    o ini_forcing shifted to begining of initialise_varia
2978    o Incorporating QNVS line search routines into MITgcm
2979      (this is separate code, and therefore not under pkg)
2980      lsopt/, optim/
2981    o Updated verification/carbon/
2982      - #define GM_VISBECK_VARIABLE_K
2983      - GM_taper_scheme    = 'ldd97'    
2984    
2985    checkpoint46n_post
2986    Merging from release1_p8:
2987    o verification/natl_box:
2988      updating new external_fields_load routine
2989    o New package: pkg/seaice
2990      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
2991      The sea-ice code is based on Hibler (1979-1980).
2992      Two sea-ice dynamic solvers, ADI and LSR, are included.
2993      In addition to computing prognostic sea-ice variables and diagnosing
2994      the forcing/external data fields that drive the ocean model,
2995      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
2996      The implied surface heat flux is then stored in variable
2997      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
2998      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
2999      non-local transport term.  Because this call precedes model
3000      thermodynamics, temperature under sea-ice may not be "exactly" at
3001      the freezing point by the time theta is dumped or time-averaged.
3002      N.B.: fairly large differences in accuracy occur across
3003            different platforms/compilers; comparison between
3004            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
3005            generated output gives:
3006       T           S           U           V
3007      C D M    c        m  s        m  s        m  s        m  s
3008      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
3009      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
3010      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
3011    
3012      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
3013    o GAD:
3014      - generated new common blocks to account for call of
3015        same gad routines with differing traceridentities
3016        (needed to modify tracerIdentity indices in GAD.h)
3017      - generated separate common blocks for case useCubedSphereExchange
3018        (Department of Futurology)
3019      - parameter lists to gmredi_?transport: added tracerIdentity
3020      - added new key indices to tamc.h
3021    o external_fields_load:
3022      - added this routine to TAF list
3023      - needed to make some common blocks global and additional storing
3024        along the same lines as exf package (checkpoint_lev?_directives.h)
3025    o exf:
3026      updated external forcing package
3027      - bug fixes carried over from ecco-branch
3028        (missing OBCS_OPTIONS.h in two routines)
3029      - enable easy to use "no forcing".
3030      - added exf I/O for atmospheric loading
3031      - added exf I/O for runoff data
3032      - transfered scaling between exf <-> MITgcm to exf namelist
3033    o Adding new verification experiment global_with_exf.
3034      This verification experiment is almost identical to the
3035      global_ocean.90x40x15 experiment, except that it uses
3036      the exf (and cal) package instead of the
3037      external_fields_load routine (cf README file).
3038    
3039    checkpoint46m_post
3040    o modified testscript to return -- when there are no lines of "%MON" output
3041    o added new flag "quasiHydrostatic" for QH mode
3042      and new routine quasihydrostaticterms()
3043    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
3044      New routine: mom_u_coriolis_nh()
3045    o fixed sign of non-hydrostatic metric terms in u and v equations.
3046      Depend on correct sign of gravitySign.
3047    o added work.pc* to .cvsignore in aim directories using ifc
3048    o introduced flag for controllin non-hydrostatic metric terms
3049    o removed gravitySign from PARM04
3050    o switched to g77/ifc from pgf77 in aim experiments
3051    
3052    checkpoint46l_post
3053    o made convective adjustment work with pressure coordinates:
3054     - changed the direction of k-loop in convective_adjustment.F for the
3055       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
3056     - adjusted the reference pressure k-index in convective_adjustment.F
3057     - adjusted the convection condition in convect.F (in analogy to
3058       calc_ivdc.F)
3059     - convective_adjustment no longer computes anything on the halos
3060     - removed the warnings about negative salinity from find_rho.F and
3061       find_alpha.F; instead the new routine look_for_neg_salinity, called
3062       at the beginning of find_rho, find_alpha, and find_beta, does a
3063       check of the entire slice, if CPP-option
3064       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
3065    checkpoint46l_pre
3066    
3067    checkpoint46k_post
3068    o fixed the verification/global_ocean.90x40x15 experiment:
3069     - new bathymetry (the world according to A., JMC, and M.)
3070     - new initial fields and forcing fields (*.bin files)
3071     - new POLY3.COEFFS (for the next release one should switch to a full
3072       equation of state: JMD95P or MDJWF)
3073     - fixed several errors and redundancies in the data file
3074     - experiment uses looped cells
3075     - added matlab directory with diagnostic scripts for plotting of output
3076    
3077    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
3078     - read AIM physics parameters from a file (data.aimphys)
3079     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
3080    
3081    checkpoint46j_post
3082    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
3083    o move wVel computation at the end of the time step, in S/R integr_continuity
3084    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
3085    o update timeave pkg for wVel diagnostic.
3086    checkpoint46j_pre
3087    
3088    checkpoint46i_post
3089    o Clean up AIM package (and keep the results unchanged):
3090      include CPP_OPTION and use IMPLICT NONE in all routines ;
3091      declare all the variables _RL ; use _d 0 for all numerical constants.
3092      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
3093    
3094    checkpoint46h_post
3095    o cleaned up the use of rhoNil and rhoConst.
3096      - rhoNil should only appear in the LINEAR equation of state, everywhere
3097        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
3098        and the dynamical equations are all divided by rhoConst
3099    o introduced new parameter rhoConstFresh, a reference density of fresh
3100      water, to remove the fresh water flux's dependence on rhoNil. The default
3101      value is 999.8 kg/m^3
3102    o cleanup up external_forcing.F and external_forcing_surf.F
3103      - can now be used by both OCEANIC and OCEANICP
3104    checkpoint46h_pre
3105    
3106     Added code to convert surface volume flux (fresh water) into
3107     a mass flux when using P coordinates in the ocean (OCEANICP).
3108     Note: It assumes you have set rho0=rhoConst=density of fresh water.
3109    
3110    checkpoint46g_post
3111    o Include a new diagnostic variable phiHydLow for the ocean model
3112      - in z-coordinates, it is the bottom pressure anomaly
3113      - in p-coordinates, it is the sea surface elevation
3114      - in both cases, these variable have global drift, reflecting the mass
3115        drift in z-coordinates and the volume drift in p-coordinates
3116      - included time averaging for phiHydLow, be aware of the drift!
3117    o depth-dependent computation of Bo_surf for pressure coordinates
3118      in the ocean (buoyancyRelation='OCEANICP')
3119      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
3120        Theta, Salinity, and Pressure in the parameter list. This routine is
3121        presently contained in find_rho.F. This routine does not give the
3122        correct density for 'POLY3', which would be a z-dependent reference
3123        density.
3124    o cleaned up find_rho
3125      - removed obsolete 'eqn' from the parameter list.
3126    o added two new verification experiments: gop and goz
3127      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
3128    checkpoint46g_pre
3129    
3130    checkpoint46f_post
3131    o Enable tangent linear (forward mode) gradient checks:
3132      - extended active file handling to g_... files
3133      - added TANGENT_SIMULATION to theSimulationMode
3134      - extended grdchk package accordingly
3135    o added tangent linear setup in verification/carbon/code_ftl
3136    o added adjoint setup in verification/front_relax/code_ad
3137    
3138    checkpoint46e_post
3139    o Added new equation of state -> MDJWF
3140      - EOS of McDougall et al., 2002, JAOT, submitted
3141      - caveat: the equation of state is only valid for a smaller (more
3142        realistic?) range of values than JMD95P/Z and UNESCO
3143      - added masks to the calculation of pressure in store_pressure
3144      - added more check values for density in check_eos (ini_eos.F), some of
3145        the old check values are out of the range of the MDJWF-eos, so don't
3146        expect perfect matches for those
3147    checkpoint46e_pre
3148    
3149    checkpoint46d_post
3150    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
3151      'OCEANICP', also initialised field pressure correctly in ini_eos in the
3152      case of pressure coordinates. eosType='JMD95Z' in
3153      combination with buoyancyRelation='OCEANICP' now causes an error.
3154    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3155      in find_alpha/beta.
3156    checkpoint46d_pre
3157    
3158    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3159      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
3160    
3161    checkpoint46c_post
3162    o Changes necessary for ocean in p-coordinates
3163     -  Added new buoyancy relation = 'OCEANICP'
3164     -  Added new parameters = gravitySign (this used to be contained inside
3165        the factor dRdZ which I added when we first switched to R coordinates).
3166     X GM/Redi is not compatible (yet)
3167     X bottom drag and no-slip need to be debugged.
3168    checkpoint46c_pre
3169    
3170    checkpoint46b_post
3171    o Added new equation of state -> JMD95Z and JMD95P
3172      - EOS of Jackett and McDougall, 1995, JAOT
3173      - moved all EOS parameters into EOS.h
3174      - new routines ini_eos.F, store_pressure.F
3175    o Added UNESCO EOS, but not recommended because it requires
3176      in-situ temperature (see JMD95)
3177    o Modified formatting for knudsen2.f in utils/knudsen2 and added
3178      unesco.f to be used with POLY3
3179    checkpoint46b_pre
3180    
3181    checkpoint46a_post
3182    o Added (atmospheric) pressure loading
3183      - new field in FFIELDS.h, etc...
3184      - new cpp flag ATMOSPHERIC_LOADING
3185    o Changed hFacC to _hFacC in calc_phi_hyd.F
3186    o Added SHORTWAVE_HEATING to some files for consistency
3187    checkpoint46a_pre
3188    
3189    checkpoint46
3190    further merges from release1_p5
3191    o new ctrl package
3192      - adopted from ECCO environment to enable optimization
3193      - added Eliassen Palm fluxes to controls
3194    o added Eliassen Palm flux controls to gradient check package
3195    o cost package
3196      - Compatible with new ctrl package
3197      - added Eliassen Palm cost hooks
3198      - modif's of existing cost functions
3199    o Adjoint-related bug fixes in kpp:
3200      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
3201      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
3202    o autodiff package
3203      - flow directives:
3204        + new for S/R do_the_model_io
3205        + enhanced for S/R checkpoint
3206        + new gmredi.flow
3207      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
3208        disable adcommon.h/g_common.h by default.
3209      - fixed problem for adjoint of global_max
3210    o modified verification/carbon/
3211    o New setup for adjoint of global_ocean
3212    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
3213    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
3214    o incorporated hooks for sponge layer code (external_forcing.F)
3215    
3216    checkpoint45d_post
3217    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
3218    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
3219      (affects plume_on_slope "cg2d" output)
3220    o add new parameter deltaTfreesurf for free-surface time stepping
3221    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
3222    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
3223    o change phiMin in exp1 (to agree with documentation)
3224    o add new flags:
3225     - T,S forcing inside/outside Adams-Bashforth
3226     - turn off temp,salt advection and/or forcing
3227     - for each tracer, define internal flag for multiDimAdvection & A-B
3228    o monitor: change definition of KE to check conservation of Energy
3229    
3230    checkpoint45c_post
3231    o Removed f90 comments ("!")
3232    o Modified initialisations to enable exf package for MITgcm
3233      (without invoking ECCO_PACKAGE).
3234    o modifications to gradient check package (Martin Losch)
3235      - enable centered differences
3236      - modified format of standard output
3237    
3238    checkpoint45b_post
3239    o cleaned exchange calls in cg2d
3240    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
3241    o included CPP option SINGLE_LAYER_MODE in thermodynamics
3242      to configure barotropic setup (Martin Losch)
3243    o moved some initialisations within bi,bj loop in dynamics
3244      (TAF flow dependency)
3245    o in initialise_varia, moved call packages_init_variables
3246      before convective_adjustment_init
3247      (corresponding adjustment of TAF tape initialisation).
3248    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
3249    
3250    checkpoint45a_post
3251    o compute Rho over the whole domain (extend iMin,jMin indices)
3252    o specific exchange for X-slice domain (case Ny=1)
3253    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
3254    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
3255    
3256    checkpoint44h_post = checkpoint45
3257    o Fix to restore differentiability:
3258      place at which packages_init_variables is called in
3259      initialise_varia is crucial for reverse control flow.
3260    o modifications in GMRedi to enable stable adjoint
3261      (corresponding modif's in thermodynamics, dynamics)
3262    o added missing hook for sponge layer code in external_forcing
3263    o modified test cost functions
3264    o storing in gad_advection (plus removal of write(0,*)!
3265    o missing headers TR1.h added in convective_adjustment routines
3266    o errorMessageUnit set non-equal zero in eeboot
3267      (conflict on some platforms, e.g. IBM SP3)
3268    o modified carbon verif.
3269    
3270    checkpoint44h_pre
3271    o vertical grid option: allow to put the Interface at the middle between
3272      2 cell-centers ; replace delZ in pkg/kpp by drF.
3273    o GM Advective form: Tracers are advected using the residual transport (=
3274      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3275    
3276    checkpoint44g_post
3277    o fix surface correction term in multiDimAdvection (affects plume_on_slope
3278      results) ; ifdef missing in thermodynamics.F
3279    
3280    checkpoint44f_pre,checkpoint44f_post
3281    o added PTRACERS package
3282      This allows an arbitrary number of passive tracers to be integrated
3283      forward simultaneously with the dynamicaly model.
3284      + Implemented so far:
3285        - basic forward algorithm (time-stepping, advection, diffusion, convection)
3286        - I/O and checkpointing
3287        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
3288      + Not implemented so far:
3289        - KPP
3290        - OBCS
3291      + No specific example supplied (yet) but global_ocean.90x40x15 has the
3292        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
3293        line in data.pkg.
3294      + This package is disabled by default since it increases storage.
3295    
3296    
3297    o testscript: added -cleanup option
3298    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
3299                 b) enable to filter 2D fields.
3300    
3301    checkpoint44e_pre,post
3302    o re-wrote convective adjustment to use pre-calculated weights
3303      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3304      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3305      Original calls to convect() still in place.
3306    
3307    chkpt44d_pre,post
3308    o added missing EXCLUDE_MONITOR flags
3309    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3310      (incompatible typ in MIN/MAX expressions caused problems
3311      on IBM SP3)
3312    o in genmake added variable MAKEDEPEND
3313      plus resetting for case SunOS
3314    o added timer_stats.c routine for IBM SP3
3315    o removed variables in dynamics
3316    !!! I forgot to create tag chkpt44d_pre !!!
3317    !!! But chkpt44d_pre = chkpt44c_post    !!!
3318    
3319    o real fresh water flux implemented with non-linear free-surface.
3320    
3321    chkpt44c_pre,post
3322    o few fix (mask in shap_s2, EmPmR in external_field_load,
3323      USE_NATURAL_BCS in solve_for_P);
3324    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
3325    
3326    checkpoint44b_pre/_post
3327    o merge of relevant stuff from the ecco-branch:
3328      - genmake: removed $S64 overwrite for case SunOS
3329      - pkg/exf: update and corrections for field swapping and obcs
3330      - pkg/ecco: parameter lists for the_model_main, the_main_loop
3331                  harmonized between ECCO and MITgcm
3332      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
3333                      updated checkpointing_lev... lists for obcs
3334      - model/src: minor changes in forward_step, plot_field
3335                   added directive for divided adjoint in the_main_loop
3336      - pkg/mdsio: added mdsio_gl_slice
3337    
3338    o check parameters & config (chkpt44a_pre,post)
3339    o OBC and NonLin_FrSurf.
3340    
3341    checkpoint44
3342    o fix bug in mom_vi_del2uv
3343    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
3344    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
3345    o update AIM experiments (NCEP input files)
3346    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
3347    o added some stuff for AD
3348    
3349    checkpoint43
3350    o added two new advection tests
3351    o added global 4x4 degree ocean test
3352    o added test of H&S94 with free surface on cube
3353    o some final mods for gradient check, adjoint,...
3354    
3355    checkpoint42
3356      Fixed AD-related problems:
3357    o Store directives up-to-date with re-arranged Adams-Bashforth
3358      (mainly thermodynamics.F)
3359    o New store directives for multi-dim. advection schemes
3360      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
3361      * new common block and key passkey
3362      (mainly gad_advection.F)
3363    o Modified store directives for split of dynamics/thermodynamics
3364      for the case ALLOW_KPP
3365    o Cleaned argument list for timestep_tracer.F
3366    
3367    checkpoint41
3368    o re-formatted/added comments in prologues of key subroutines
3369      to work with protex
3370    
3371    checkpoint40
3372    o moved calc_gs, calc_gt and calc_tr1 back to model/src
3373    o added FLT (floats) package from Arne along with demo. experiment
3374    o re-arranged Adams-Bashforth scheme for tracers to allow easier
3375      implementation of forward-in-time forcing terms
3376    o more mods for non-linear free-surface including new variable
3377    o modified multi-dim method to work on cube
3378    o bug fix in KPP (from DM)
3379    
3380    checkpoint40pre9
3381    o added DST advection schemes
3382    o fix MPI bug on SGI's
3383    o modifications for non-linear free-surface
3384    o fixed conditionals for fixed flow/passive tracer only mode
3385    o added tension/strain form of stress tensor
3386    o changes to commenting of arguments for TAF/TAMC
3387    o added/updated many matlab scripts
3388    o added multi-dimensional advection method for tracers
3389      
3390    checkpoint40pre8
3391    o new package rw/
3392      Added method for dumping intermediate local arrays:
3393      mdsio_writetile - same as mdsio_writefield except works from inside
3394                        bi,bj loop
3395      mdsio_writelocal - same as mdsio_writetile except works for local
3396                         arrays
3397      write_local_r? - higher-level wrapper for mdsio_writelocal
3398      Controlled by diagFreq. Defaults to zero (ie. no dumps)
3399      Example given at end of mom_vecinv.F that dumps some local arrays.
3400    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
3401      control flux-form versus vector invariant code.
3402      Switch is runtime flag vectorInvariantMomentum (defaults to false)
3403      or genmake -DISABLE ...
3404    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
3405      (additional storing is now needed for case vecinv;
3406      currently nothing implemented to switch this storing off
3407      in case fluxform is used since no CPP flag available).
3408    
3409    checkpoint40pre7
3410    o bug fix in dynamics.F
3411      calc_viscosity called before k=1,Nr loop.
3412    o added some #ifdef's ALLOW_PASSIVE_TRACER
3413    o cleaned initialisations in ctrl_map_ini
3414      related to TAF
3415    
3416    checkpoint40pre6
3417    o split dynamics into thermodynamics & dynamics
3418    o corresponding split of calc_diffusivity into
3419      calc_diffusivity, calc_viscosity
3420      (kpp_calc_diff, kpp_calc_visc).
3421    o Added diffkr, kapgm to control variables
3422    o bug fix in gmredi_slope_limit for ldd97
3423    
3424    checkpoint40pre5
3425    o proper initialization of Adams-Bashforth time stepping
3426      + uses forward step for very first step of model (iter=0)
3427    o re-generated *all* output since almost all output is modified by this
3428      change (sorry but we've been putting this one off for about 2 years)
3429      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
3430        *not* regenerated since they are already out of date and I don't
3431        want to create the impression that they are suddenly working.
3432    o removed KAP stuff for DEC's
3433    o modified/added many .cvsignore files in */code and */input
3434    o added new expt "solid-body.cs-32x32x1"
3435      + this uses an alternative form of ini_curvilinear_grid.F which
3436        is not necessarily any better than the current one...
3437    
3438    checkpoint40pre4
3439    o added re-initialisations of utrans,vtrans,rtrans in
3440      calc_common_factors which are crucial for TAF.
3441    o extended iMin,jMin range for calc_common_factors,
3442      calc_diffusivity
3443    o added option ALLOW_PASSIVE_TRACER
3444    o a few minor updates and fixes
3445    
3446    checkpoint40pre3
3447    o created calc_gtr1.F for gad package
3448    o split the_main_loop and re-introduced forward_step
3449    o some recomputations of nIter0 for TAMC
3450    
3451    checkpoint40pre2
3452    o Updated to latest branch of AJA, JMC
3453    o Added gradient check package
3454    o Added routines for passive tracer handling
3455    o Added carbon sequestration sensitivity experiment
3456    
3457    checkpoint39
3458     o Modifications and fixes to support TAMC
3459       (mainly missing or wrong directives)
3460     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3461       in addummy_in_stepping
3462     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3463     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3464     o Included following packages:
3465       cal: calendar
3466       exf: external forcing
3467       ecco: essential routines to control use of cal, exf
3468             (NB: this is not the full ECCO environment)
3469     o disabled some packages by default in genmake
3470    
3471  checkpoint38  checkpoint38
3472   o see notes_c37_adj.txt   o see notes_c37_adj.txt
3473   o corrected wrong layer index in external_forcing_t   o corrected wrong layer index in external_forcing_t

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