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revision 1.519 by heimbach, Thu Jul 28 14:35:47 2005 UTC revision 1.950 by mlosch, Fri Feb 1 11:06:33 2008 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7  o adding precip control xx_precip  o pkg/mnc: have mnc create marginally meaning full coordinate variables
8  o moved ptracer ctrl index 17 -> 32    (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
9    o pkg/mypackage:
10      - add example of read/write pickup for state-var ;
11      - add entry points to the main code for state-vars diags & write-pickup.
12    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
13      transitions for useExfYearlyFields
14      - add new subroutine that determines the file to read from for
15        use*YearlyFields = .TRUE. and .FALSE.
16      - add a verification experiment to global_with_exf that tests
17        useExfYearlyFields with USE_EXF_INTERPOLATION defined
18    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
19      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
20      subroutines (which could be generated from a template, because they are
21      almost identical), for now they are included in obcs_prescribe_read.F for
22      simplicity
23    o pkg/exf:
24      - add a little more diagnostic to exf_interp_read (in analogy to
25        mds_read_field, can be turned off with debugLevel < debugLevA=1)
26      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
27        ugly but fast by unrolling short inner loops, inserting a unroll=8
28        directive in routine lagran, and splitting a loop and making do while the
29        outermost loop (the latter requires the intoduction of index arrays)
30    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
31    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
32      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
33    o verification/seaice_obcs: updated for restart test and latest options
34    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
35      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
36      for now this is only available for the C-grid code and also within
37      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
38    
39    checkpoint59m
40    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
41      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
42    o gad_som : fix flux output (& diagnostics) to have same units as other  
43      advection scheme fluxes (was previously multiplied by deltaT).  
44    o added verification/seaice_obcs both to test seaice open boundaries
45      and to provide an example matlab scrpt for generating them
46    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
47    o pkg/salt_plume: clean up salt_plume_frac.F to
48      remove redundancy in PlumeMethod 1 and 4
49    o pkg/kpp: added saltplume diagnostics
50    o pkg/obcs and pkg/seaice:
51      - do not set uice and vice to zero when OB*icefile are unspecified
52      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
53      - moved seaice tracer obcs after call to seaice_growth
54    o pkg/salt_plume: added various options for salt plume depth
55      criterion and for vertical distribution of the salt
56    
57    checkpoint59l
58    o pkg/ptracers: new version of ptracers pickup:
59      read meta file and write only fields which are needed to restart.
60      ( same logic as main pickup file ; also using pickupStrictlyMatch )
61    o pkg/seaice:
62      - add timescale for melting due to warm mixed layer as a means of
63        setting SEAICE_availHeatFrac more conveniently
64      - add a CPP-flag/runtime parameter check for flooding algorithm
65      - reformulated availHeat in seaice_growth.F to be independent of AREA
66    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
67      unit changes
68    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
69    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
70      SX vector computer.
71    o pkg/seaice:
72      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
73        seaice forcing fields can now be read only through pkg/exf
74      - removed some unused halos
75    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
76    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
77      or U/VICE from U/VWIND before computing U/VSTRESS
78    
79    checkpoint59k
80    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
81      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
82    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
83      all experiments pass when compile with un-initialised var. checking option.
84    o added pkg/salt_plume
85    o script to test restart (for now, in MITgcm_contrib/jmc_script)
86    o pkg/seaice: new read/write pickup version.
87      read meta file and write only fields which are needed to restart.
88      ( same logic as main pickup file ; also using pickupStrictlyMatch )
89    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
90    o lab_sea.hb87: modify the domain & update output.hb87.txt :
91      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
92      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
93      process. Fixed here by closing the domain at the Northern boundary.
94    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
95    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
96      a set of consecutive levels in/from a 3-D array.
97    o pkg/ptracers:
98      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
99      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
100    
101    checkpoint59j
102    o in pkgs: dic, obcs, offline, rbcs:
103      standard way to compute coeff. for time interpolation between 2 time reccords
104      which retains full precision (& make results less dependent on compiler).
105      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
106    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
107      packages instead of reading ice cover and wind speed separately
108    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
109     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
110      to allow to compile customized code before the update)
111    o cleaning-up:
112      - fix CPP instruction syntax in pkg/obcs
113      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
114        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
115      - fix some threads issue in IO parts.
116    o pkg/dic:
117      - add tons of "_d 0" (--> much better testreports !)
118       and then update outputs of tutorial_global_oce_biogeo
119    o pkg/mom_fluxform:
120      add a special version of momentum advection intended to conserve momentum
121      next to a bathymetry step or a coastline edge. (default = off = #undef)
122    o new read/write pickup version:
123      - for now, only implemented for main (mdsio) pickup file.
124      - write out only what is needed to restart; merge pickup_nh , pickup_ph
125        and main pickup together.
126      - read meta file; read only what is needed to restart; stop if a field
127        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
128        if it make sense (even if the restart is not perfect).
129      - if no meta file, assume that pickup to read corresponds exactly to
130        a pickup that would currently be written.
131      - read pickup written in the old format (until checkpoint59i) if it
132        recognizes an old meta file (no field-list).
133      - add a meta file in exp. which starts from a pickup: 2 cases:
134        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
135         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
136        b) a meta file describing the content of the associated pickup file
137         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
138    o pkg/mdsio & pkg/rw:
139      - new routine to read a meta file ; new set of routine to read
140        Multiple-fields file (with meta file).
141    o added open boundary conditions capability for seaice
142        HSNOW, HSALT, UICE, and VICE
143    
144    checkpoint59i
145    o adjoint:
146      * fix multiDimAdvection adjoint
147        (partial recomputation problem by TAF for fVerT(:,:,kDown)
148        and comlev1 size definition (maxpass vs. max. number of tracers)
149      * verification/global_ocean.90x45x15 adjoint now tests
150        NLFS and multiDimAdvection using DST3 (=30)
151      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
152    o pkg/kpp: add "_d 0" to real constant (if missing);
153      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
154      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
155    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
156      for internal parameters related to restart process (formerly from PARAMS.h)
157      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
158    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
159      as argument. (only atm2d & obcs write_pickup have not yet been updated)
160    o pkg/monitor:
161      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
162      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
163      - account for deep Atmosphere factor and density factor (anelastic)
164    o added open boundary conditions capability for seaice HEFF and AREA
165    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
166      thermodynamics
167      - requires a little reorganization, which affects the testreport results
168        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
169        so that now the conservative form is tested
170      - add a few comments
171    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
172    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
173    o add new diagnostics to seaice: advective, diffusive fluxes (only for
174      multidim-advection, for scheme 2 they are not filled) and transports,
175      thermodynamic growth rates
176    o change units of EmPmR (inside the code, + within coupling interface)
177      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
178      Affects results @ truncation level (cg2d match) and update output of
179       experiments: lab_sea(6), global_ocean.90x40x15(10),
180      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
181      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
182      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
183      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
184    
185    checkpoint59h
186    o pkg/exf:
187      - improve vectorization by moving if-statement out of loops in
188        exf_mapfields, exf_radiation
189      - exf_bulkformulae.F: introduce 2D fields and vectorize code
190    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
191    o testreport:
192      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
193        monitor & update offline_exf_seaice exp. output.
194      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
195    o pkg/seaice:
196      - bug fix in the evp solver: boundary conditions were affected be
197        masking of zMax/zMin (changes results)
198      - minor bug fix in boundary conditions in seaice_calc_strainrates
199        (changes results for no_slip)
200      - seaice_lsr.F: make interpolation of eta dependent on boundaries
201      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
202      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
203        stress formulation and no-slip boundary conditions
204    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
205      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
206    o pkg/seaice: a first HSALT time stepping equation has been checked in
207    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
208      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
209      without requiring DO-IF statements
210    o pkg/thsice:
211      use continuous power-law function for partition of energy between lateral
212      melting/freezing and thinning/thickening ; old code using step function
213      still available with #undef THSICE_FRACEN_POWERLAW
214      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
215    o testreport: change AD testing : check against results/output_adm.txt
216      using same scripts as for forward test.
217    
218    checkpoint59g
219    o adjoint testing: in preparation for changing testreport:
220      - output format: cost and grad written on separated lines
221      - ad output results in directory "results" (instead of "results_ad")
222    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
223    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
224    o pkg/ecco: allow user defined cost function contributions
225    o testreport:
226      Allow to choose (per experiment) the list of tested output variables
227       and the main variable (used to issue a pass/FAIL ) ;
228      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
229      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
230      Also modify printing of summary:
231       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
232       b) echo the list of tested variables in the individual summary.txt of
233          each experiment.
234    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
235      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
236      (but still depend on the tile decompostion of the domain).
237    o pkg/seaice: change a discretization detail to make the B-grid code
238      "more symmetric". This change is likely to remove all "ridges/leads" that
239      where quasi-aligned with the grid in B-grid solutions. It may also be
240      the solution to the stress coupling issues with the B-grid.
241    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
242      remove .cvsignore from input dir. (since testreport no longer run here).
243    o pkg/thsice:
244     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
245     - fix reshaping of sea-ice just after advection:
246       melt all the ice only if ice-volume is too small.
247     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
248       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
249     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
250    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
251      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
252    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
253      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
254      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
255      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
256      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
257      -> update output.txt
258    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
259     this affects truncation error: -> update output.txt of exp:
260      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
261      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
262    
263    checkpoint59f
264    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
265    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
266      a bounded range (in forward mode)
267    o pkg/ecco, ctrl, autodiff and mom_common:
268     internal parameter controls, completements of implementations
269    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
270    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
271      (not seem any difference in testing results).
272    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
273       at face corners.
274    o pkg/generic_advdiff:
275     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
276      loop range indices for computing vertical advection tendency
277      and do the calculation in the interior only (no overlap) ;
278      for now, only implemented for SOM advection (to save CPU time).
279     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
280    o exch2 adjoint
281      First set of changes:
282      - add exch2 hand-written adjoint templates
283      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
284        This will require cleanup in pkg/autodiff/*.F
285        (changed routines currently kept separate in verif. code/)
286      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
287        that used to hide exch2 or cubed-sphere specific code
288        (commented via 'cph-exch2')
289    o pkg/seaice
290      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
291    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
292       output of global_ocean.cs32x15.thsice .
293    
294    checkpoint59e
295    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
296      for B-grid vector (not yet tested) and C-grid vector (<- only used
297      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
298    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
299      (#ifdef ALLOW_SALT_PLUME)
300    o gather_2d/scatter_2d: removed halo regions
301    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
302      scheme and the corresponding test case (under front_relax dir). For now,
303      only available with Skew-flux form and not yet tested in realistic set-up.
304      adjoint: store directives updated, but gradient checks deteriorated,
305      so maybe GM/Redi adjoint is now broken.
306    o seaice adjoint
307      * add AREA, HEFF, HSNOW as control variable
308        (should not change lab_sea results)
309      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
310    o pkg/seaice:
311      * added computation of saltFlux in seaice_growth;
312        For time being, sea ice salinity is assumed constant
313        contribution of snow flooding to freshening of sea ice is neglected.
314        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
315        defaults to 0.0 in order to maintain backward compatibility.
316        Typical values for SEAICE_salinity are 4 to 10 g/kg.
317      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
318      * added SEAICE_availHeatFrac, which specifies fraction of surface level
319        heat content used to melt or grow ice
320      * commented out cap of HICE: it helps keep ice thinner
321      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
322      * applied OBCS T/S mask to HEFFM sea ice mask
323    
324    checkpoint59d
325    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
326     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
327     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
328    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
329     and change default value of parameter "GM_Small_Number";
330     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
331       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
332       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
333    o pkg/ecco: cost function when applying pkg/smooth to controls
334    o pkg/ctrl: add forcingPrecond run time parameter
335    o pkg/seaice:
336     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
337     - fix bug in metric terms of u-equation in LSR solver (implicit part),
338       changes verification/lab_sea
339     - rearrange implicit part of u-equation in LSR solver to make it easier to
340       read, understand, and debug. This causes changes at the truncation level.
341     - fix (serious) bug in the boundary conditions (sign error in the implicit
342       part) of the LSR solver. Changes all LSR results.
343     - fixed problem with HSNOW initialization to avoid thick snow when AREA
344       is initilized with small values - does not change lab_sea results.
345     - added HsnowFile initialization capability
346    o pkg/smooth: addition to model/src and pkg/ctrl so allow
347     initialization of pkg/smooth and application to control vector
348    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
349    o dependencies: pkg/profiles requires pkg/cal
350    o pkg/profiles:
351     - added option ALLOW_PROFILES_GENERICGRID
352         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
353         that interpolation information (grid points and coefficients) is provided
354         within the netcdf input files.
355         -> sample matlab scripts can be found in MITgcm_contrib/gael
356         that allow you to prepare netcdf input files.
357     - also modified: cleaner include statements, cleaner error print statements,
358       cleaner stops when error, and more tests of the netcdf input files consistency.
359    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
360    o pkg/seaice:
361     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
362       requires a new routine: seaice_diagnostics_fill.F
363     - make sure that seaice does not move if not forced (pressure replacement
364       method, Hibler and Ip, 1995), changes results
365     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
366     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
367       It is turned off by default (=-1.), because it changes the results.
368     - make it possible to read AREA from a file, too.
369    
370    checkpoint59c
371    o add S/R and diagnostics for oceanic mixed-layer depth
372    o move GMRedi call after all vertical mixing schemes (including KPP)
373    o pkg/thsice:
374     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
375      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
376    o pkg/obcs:
377     - bug fix for balance code
378    o pkg/seaice:
379      - allow values of SEAICE_elasticParm > 1
380      - add new parameter SEAICE_evpTauRelax as an alternative
381        to SEAICE_elasticParm
382      - make lsr boundary conditions free slip (by default), changes result
383      - add code for no slip boundary conditions for lsr
384      - set minimum of zeta to zero (and not 4e8) (changes results)
385      - add a cap on AREA after advecting AREA if seaice_growth is not called
386    o change calculation of Visbeck K:
387      - no longer depend on tapering scheme; instead, compute slope (limited
388        by GM_maxSlope). this is equivalent to what was comuted before with
389        clipping or linear tappering.
390      - fix vertical averaging (wrong by 1/2 level)
391      - leave the old version (but will not be maintained) within
392        #ifdef OLD_VISBECK_CALC / #endif
393      - update output of exp. ideal_2D_oce
394    o change error catch in calc_r_star to improve vectorization
395    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
396      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
397    o adjoint:
398      Re-organized adjoint checkpointing according to Matt Mazloff
399      (but with modifs/completions/cleanups)
400      Storing is now bundled into large arrays to optimized I/O
401      (and second step in cleanup of the_main_loop)
402    
403    checkpoint59b
404    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
405      - export/import (between ocean & coupler) fields needed for ocean DIC.
406    o pkg/seaice:
407      - get rid of three more exchanges seaice_calc_viscosities (required
408        different loop boundaries in seaice_lsr and seaice_ocean_stress)
409      - bug fix in seaice_ocean_stress (update of lab_sea required)
410      - reduce loop boundaries to necessary minimum also in seaice_evp
411      - go back to the old way of computing deltaC/Z as the adjoint likes that
412        better
413    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
414      passive tracer to an Age Tracer) + update output.txt
415    o pkg/exf:
416      - implement A-grid / C-grid selection for wind-stress input files.
417      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
418      for now, in exf_bulk_largeyeager04.F only :
419      - change implementation for case where windspeed + 2. components wind-stress
420        are read-in. AND use rhoConstFresh to convert evap.
421    o pkg/seaice:
422      - use correct EXCH_UV for wind-forcing (on A-grid).
423      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
424        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
425    o pkg/exf:
426      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
427      EXF_INTERPOLATION:
428      - merge global_with_exf/code version of exf_interp_read.F
429        to the main code ;
430      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
431        reading the file ; Important: This options needs to be defined to recover
432        previous code.
433        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
434      - no longer loose real*8 precision along the way when using exf_iprec=64.
435    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
436      - change discretisation of evp-solver in order to avoid another exchange
437        (changes lab_sea) and clean up a little
438      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
439        help the adjoint (this also changes the results slightly)
440      - add a few "_d 0" where they had been missing in seaice_evp.F
441      - cleaning up: remove unused seaice_calc_rhs.F
442    o pkg/exf: some cleaning-up:
443      - change various "constants" into runtime parameters
444      - cleaned-up Large&Yeager04 routine which should eventually
445        replace exf_bulkformulae.F (changed names of S/R and CPP)
446        and merged various ALLOW_ATM_WIND options
447     only used with thsice pkg (in thsice_get_exf.F):
448      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
449        which are used when useStabilityFct_overIce=TRUE (= the default)
450      - change default values of ice & snow emissivity and scale downward LW
451        by ice & snow emissivity.
452    o pkg/thsice:
453     fix few little problems, in thsice_calc_thickn.F:
454      - growth vertically (and not laterally) if iceFrac == iceMaskMax
455      - melt only laterally if hIce < hThinIce (as the comments say)
456      and in thsice_extend.F:
457      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
458      - start to form ice as soon as the minimum ice-volume is reachable.
459     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
460      and cpl_aim+ocn
461    o pkg/kpp
462     - move computation of surface related input fields to KPP into a new
463       subroutine kpp_forcing_surf.F
464     - remove wrong (within bi,bj loops) EXCH calls.
465     - little cleaning (add argument myThid in last position, cvs header ...)
466     - for now, fix conservation problem by exchanging KPPviscAz (may not
467       be the best fix)
468    o pkg/seaice
469     - check for inconsistent evp parameter/cpp-flag combination
470     - remove leftover errIO flat for obsolete name list error handling
471    o OpenAD
472     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
473    
474    checkpoint59a
475    o pkg/seaice: some parameter clarifications and a little bit of clean up
476    o pkg/thsice: rename run-time parameters:
477       himin       -> hIceMin
478       himin0      -> hThinIce
479       hihig       -> hThickIce
480       i0          -> i0swFrac
481       transCoef   -> bMeltCoef
482       frac_energy -> fracMelting
483      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
484       with default values (for now) that do not change the results.
485      remove old version of thsice vars advection in pkg/seaice.
486    o in FFIELDS.h:
487      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
488      - make pLoad & sIceLoad always available (but still only used if
489         ATMOSPHERIC_LOADING is #define).
490    o pkg/kpp: replaced _KPP_RL with _RL
491    o bug fixes for vertical diffusivity computations when both KPP and
492        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
493        are no longer updating the vertical diffusivity array
494        (passed as argument) but are (re-) setting those arrays.
495    o pkg/seaice: fix bug in evp solver, while doing that
496      - change (improve?) discretization of stress computations for both
497        cgrid-lsr and evp solver
498      - add a new routine to compute strain rates
499      - the above changes lab_sea results
500      - add no slip conditions for evp solver (off by default), lsr-version
501        may follow
502      - fix exchange for shear at Z-points (does not change lab_sea)
503      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
504        (to force the user to pick a time step since there is not "safe" way
505        of choosing it)
506      - add principal stress diagnostics
507      - rearrange fields for evp a little to avoid having to call a: too many
508        exchanges and b: exchanges for stress trensor components which we do
509        not have.
510      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
511        of evp, complete rewrite for lsr case (latter is does not yet work
512        in all cases)
513    o pkg/kpp: add code to have mixing in shelf ice caverns
514      - add myThid to all kpp routines (long overdue)
515    
516    checkpoint59
517    o pkg/exf:
518      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
519        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
520      - move exf header files from lower_case.h to UPPER_CASE.h ;
521        add missing cvs Header & Name
522      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
523      - add namelist param. selectStressGridPosition, exf_monFreq
524      - retire many _CLIM routines, and remove data.exf_clim
525        + params moved to data.exf
526        + climsst, climsss now handled by exf_set_gen, i.e.
527          climss?period=0 refers to constant field,
528          climss?period=-12 to monthly forcing
529      - split up namelists in data.exf
530    o pkg/seaice:
531      - remove seaice_exch and seaice_exch_uv
532      - remove superfluous exchange of theta
533      - add myThid to seaice_budget_ocean/ice
534      - add new interface for atmospheric wind forcing (C-grid only)
535        + new routine
536        + two new field (taux, tauy for stress over ice)
537        + removed one global field (DAIRN) for C-grid case only
538    o pkg/thsise
539      - 2nd set of modifs for thsice adjoint in conjunction with exf
540    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
541    
542    checkpoint58y_post
543    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
544      vertical diffusivity, similar to that in MOM4; turned on using
545      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
546      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
547    o Added capability for 3D specification of background vertical diffusion
548      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
549      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
550      "data" file that contains the 3D vertical diffusivity coefficients.
551    o ice dynamics (pkg/seaice) with thsice thermodynamics:
552      - add code within pkg thsice to advect & diffuse sea-ice fields
553      similar to (and will replace) what has been added in  seaice_advdiff.F,
554      but: - conserving Mass, Heat & Salt.
555           - better when using non-linear advection scheme (not yet fully tested)
556           - can also be used in atmospheric set-up (for now, only the diffusion).
557    
558    checkpoint58x_post
559    o IO option for global-file compact format:
560      - add options when generating topology (utils/exch2/matlab-topology-generator)
561      - add I/O capability (pkg/mdsio).
562      - adapt utils/matlab/rdmds.m to read this format.
563      for now long-line format not yet supported by pkg/mdsio (& exch2).
564    o shelfice: add a few diagnostics
565    
566    checkpoint58w_post
567    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
568      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
569      (and replace horiVertRatio in NH code).
570      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
571                         and tutorial_plume_on_slope (sensitive to truncation)
572    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
573      directly to drive seaice model (C-grid only)
574    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
575     - reintroduce computation of wind from stress,
576     - compute tau (in exf_bulkformulae.F) from windstress averaged to
577       mass points to avoid tau = 0
578     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
579    o rdmnc.m: make it work with "global" files created with gluemnc
580    o rdmnc.m : some improvements in dealing with singleton dimension
581      (tested on all testreport mnc output files).
582    o genmake2: disable pkg/profiles if netcdf test fails.
583    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
584    o move call to cal_readparms up to make calendar parameters/variable available
585      to all packages
586    
587    checkpoint58v_post
588    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
589      useDynP_inEos_Zc tested.
590    o pkg/exf: changes to properly interpolate/mask/scale initial fields
591    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
592      and portions thereof.  See read_cs.txt for description and examples.
593    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
594      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
595      following the great-circle arc between those 2 points.
596    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
597      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
598    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
599     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
600     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
601     - still needs work (not working with some options ; efficiency to improve)
602       and serious testing.
603     - use this scheme for temperature & salinity in 2 advection test exp.:
604       advect_xy & advect_xz, respectively.
605    
606    checkpoint58u_post
607    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
608    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
609    o testreport: add option "-skipdir" to skip some test.
610    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
611      momentum calculation.
612    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
613    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
614      remove checkpoint.F and the_correction_step.F (no longer used);
615      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
616    o add option (linFSConserveTr) to correct for tracer source/sink due to
617      Linear Free surface
618    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
619    o pkg/thsice: fix reading mnc-pickups
620    
621    checkpoint58t_post
622    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
623    o pkg/mdsio:
624     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
625       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
626       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
627     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
628     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
629       either MDS_READ_FIELD or MDS_WRITE_FIELD )
630     - new S/R (to replace MDSWRITEMETA), which allows to write more
631       informations (variable names, time ...) to meta files.
632     - modify rdmds.m to give back the meta file content.
633    o pkg/diagnostics: change vertical interpolation to be safer, and more
634       flexible (define p-levels to interpolate to in data.diagnostics);
635      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
636       diagnostic pointer.
637    o pkg/seaice: more cleaning up of seaice_growth, added many comments
638    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
639    o fix multi-category seaice:
640     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
641       SEAICE_MULTICATEGORY
642     - fix short wave heat flux
643    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
644       and allow to use EVP solver. Change forward lab_sea: test both EVP
645       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
646    o Initial check-in of lab_sea adjoint
647      (very similar to natl_box_adjoint/code_seaice)
648      * used C-grid and EVP solver
649      * used KPP, GM/Redi
650      * uses inAdExact=.TRUE.
651      * gradient checks fail for both ADM and TLM
652        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
653        f.d. gradients actually seem more problematic than ADM, TLM gradients;
654        issue is related to forward mismatch between g77 an ifort
655    o pkg/seaice: overhaul of thermodynamics
656     - growth.F and groatb.F are replaced by new routine seaice_growth.F
657     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
658     - move a few global fields out of SEAICE.h into seaice_growth.F and
659       make them 2D (FICE/QNETO/ ...)
660     - remove FO (it is the same as QNETO)
661     - introduce a few local fields to avoid modifying external fields such
662       as atemp, etc.
663    
664    checkpoint58s_post
665    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
666      changed exf_set_gen.F so that
667        genperiod=0 means input file is one time-constant field and
668        genperiod=-12 means input file contains 12 monthly means
669    o CG2D: use pre-computed solver main-diagonal (stored in common block);
670      this affects truncation error ; generate new output file for exp. which
671      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
672        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
673        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
674        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
675        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
676        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
677    o start implementation of deep-atmosphere and anelastic formulation
678    o verification: remove 2nd copy of input files and use script "prepare_run"
679      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
680    o mom_common/vecinv/fluxform: fix a few initialisation isssues
681    o profiles: fix for multithreaded case
682    
683    o diagnostics: rename few diags:
684      s/'PRESSURE'/'RCENTER '/g
685      s/'TICE    '/'oceFreez'/g
686      s/'TAUX    '/'oceTAUX '/g
687      s/'TAUY    '/'oceTAUY '/g
688      s/'SWFLUX  '/'oceQsw  '/g
689      s/DIFx/DFxE/g
690      s/DIFy/DFyE/g
691      and add few ocean-forcing diagnostics:
692      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
693    o modifications to pkg/seaice/growth.F and budget.F, which change results of
694      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
695      as actual snow thickness.  It now refers everywhere to effective snow
696      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
697    
698    checkpoint58r_post
699    o modifications to pkg/seaice/growth.F, which change results of
700      lab_sea experiment: fixes pertain to melting snow over open water, to
701      masking EVAP under sea ice, and to using the correct AREA variable for
702      computations of EVAP, PRECIP, HSNOW, and GHEFF
703    o add ability to read bathy, salt, and theta using MNC (off by def)
704    o add flooding algorithm and advection of HSNOW for pkg/seaice;
705      both are turned off by default and do no change any results
706    o seaice advection with pkg/thsice: a step toward the use of non-linear
707      advection scheme, but #ifdef or commented out for now (requires more EXCH).
708    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
709      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
710      in natl_box (affects results @ truncation level: update output.txt)
711    o multi-threading and IO:
712      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
713      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
714        (needed to work with SingleCpuIO): tested in all verif. exp.
715    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
716      affects the results (but none of the verification test uses this scheme).
717    o Adding some pkg/diagnostics capability to pkg/seaice
718      (will certainly be subject to changes)
719    o ctrl: adding new control variables:
720      lwflux, lwdown, evap, snowprecip, apressure, runoff
721    
722    checkpoint58q_post
723    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
724      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
725      high_res_cube configuration by 4% on Columbia.
726    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
727      add (in global_with_exf/code) a version of EXF_INTERP_READ without
728      dynamical allocation (seems to work in multi-threaded).
729    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
730      single CPU io) so that TAF does not have to see EESUPPORT.h
731    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
732    
733    checkpoint58p_post
734    o obcs: stop if obcs is used with useCDscheme = .true.
735    o shelfice:
736     - fix a sign error so that no slip at shelfice interface works
737     - remove stop for combination non-hydrostatic code and shelfice. That does
738       not mean, that the results are correct, but at least they are numerically
739       stable
740    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
741    o added adjoint exch routined for all exch*3d* routines
742      and updated flow directives
743    
744    checkpoint58o_post
745    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
746      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
747    o change controling S/R for writing pickup file (new S/R do_write_pickup)
748      and clean-up reading/writing of pickup files.
749    o fix local version of read/write pickup (NH part) in rotating_tank/code
750    o simplify EXCH interface:
751     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
752     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
753    o added the regrid package
754    o shelfice:
755     - add a simple boundary layer scheme to reduce noise
756     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
757    
758    checkpoint58n_post
759    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
760       local variable (not in common block).
761    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
762      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
763      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
764        to work with SingleCpuIO.
765    o add "_d 0" to real constant of pkg/cfc subroutines ;
766       update exp. cfc_exemple & tutorial_cfc_offline output files.
767    o multi-threading and IO:
768      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
769        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
770      - barrier before and after reading.
771      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
772      - avoid using MDS_WRITELOCAL for LAND pkg output.
773      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
774        common-block variables ; Allows multi-threading with master-thread IO.
775    o change default MAX_NO_THREADS from 32 to 4 ;
776      and stop cleanly when MAX_NO_THREADS is too small.
777    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
778    
779    checkpoint58m_post
780    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
781       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
782    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
783       keep global_ocean.90x40x15 (for AD testing) with former secondary test
784       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
785    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
786        add MITgcm_tutorials (= code + all the tutorials)
787    o ecco, option to compute cost for total ssh (mean+anom)
788    o consistent with addition of ptracer and ssh in pkg/profiles
789    o profiles: adding ptracer and ssh
790    o testreport: change multi-test output-file name
791      (from output.txt.{name} to output.{name}.txt)
792    o profiles: now ok for mutli-tiles case
793    o seaice: add 4 parameters for different advection schemes for area,
794      (effective) seaice thickness, enthalphy, and snow height. Their default
795      is the standard parameter SEAICEadvScheme
796    o calc_gw:
797     - add cosFacU in zonal viscous flux (harmonic.visc.).
798     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
799       of tutorial_plume_on_slope.
800    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
801    o calc_gw: true flux-form, account for horizontal grid spacing.
802      update rotating_tank results, but not plume_on_slope (affected at
803      truncation level, 11 digits).
804    
805    checkpoint58l_post
806    o calc_gw:
807     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
808     - remove side-drag for now (need to fix it); update plume_on_slope results.
809     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
810    o commit code to make SST/SSS weights spatially variable
811      (based on either variable in-situ or variable initial T/S weights)
812    o pkg/ecco:
813      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
814        now based on horizontally varying weights wthetaLev, wsaltLev
815      * cost_averagesflags now returns year indices in addition to day, month
816      * sflux balance is performed on annual basis
817        (sflxumm, sfluxmm2, bal_sfluxmm)
818      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
819        including separate counting and multipliers
820    o pkg/rbcs
821      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
822    
823    checkpoint58k_post
824    o testreport:
825     - always build in dir. "build" (if not there, mkdir build instead of building
826       & running in input)
827     - run in dir run (if it exists), in build otherwise.
828     - call prepare_run (if input/prepare_run exists)
829     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
830    o pkg/exf modifications to interpolation and rotation routines for more
831       reasonable treatment of North Pole singularity: for tracers North Pole
832       value is set to northernmost zonal-mean value, for zonal velocity it is
833       set to zero, and for meridional velocity it is set to northernmost value.
834    o pkg/exf/exf_check_range.F
835     - add tile index to diagnostics and move stop statement to the very
836       end of the routine.
837    o pkg/diagnostics: (diagnostics_main_init.F)
838      define title of isomorphic variables according to the current config.
839    o pkg/thsice with pkg/seaice dynamics:
840    - fix domain of computation (interior only, required for exf) and do exchanges
841    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
842    o towards a standard way of dealing with multi-threading in MONITOR
843      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
844    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
845       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
846    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
847    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
848    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
849       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
850    o tracer advection:
851     - clean-up and simplify calc_common_factors.F
852     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
853       advection subroutine (but still not used within DST advection S/R)
854    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
855    
856    checkpoint58j_post
857    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
858      from file (collects calls previously in FORWARD_STEP)
859    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
860    o adjoint store dir. adjusted accordingly
861    o genmake2
862      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
863    
864    checkpoint58i_post
865    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
866      on wind stress (SEAICEstressFactor defaults to 1.)
867    o Total number of Timers is finite (<=40): comment out 2 non-essential one
868      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
869    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
870      on CS-grid: no longer loosing mass.
871    o exf & curvilinear-grid: no longer modify longitude xC & xG.
872    o pkg/ggl90: fix sloppy output and fix a bug
873    o pkg/seaice: added SEAICEuseEVPpickup parameter
874      - Set to false in order to start EVP solver with
875        non-EVP pickup files when using SEAICEuseEVP
876      - fix sign error in diffusion in seaice_calc_rhs
877    
878    checkpoint58h_post
879    * Modifications for bottom topography control
880      o replace hFacC by _hFacC at various places
881      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
882      o add non-self-adjoint cg2d_nsa
883      o update autodiff support routines
884      o re-initialise hfac after ctrl_depth_ini
885      o works for 5x5 box, doesnt work for global_ocean.90x40x15
886    * Adding verification for 5x5 box (4-layer) bottom topography control
887    
888    checkpoint58g_post
889    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
890       used for mean seasonal cycle, mean diurnal cycle); add an example
891       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
892    o pkg/ggl90:
893      - add parameter (minimum surface kinetic energy)
894      - fix bug (avoiding division by zero)
895    o couple pkg/thsice to pkg/seaice:
896      - modify advection in seaice to accomodate new scalar fields to be advected
897      - only muliDimAdection scheme work with seaice/thsice
898      - mapping of thsice-variables to seaice-variables, back and forth
899      - does not break the verification experiments, but does not give the
900        desired results either
901    o pkg/seaice
902      - make (default) second order advection a bit less confusing?
903    
904    checkpoint58f_post
905    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
906      to pkg/seaice):
907      - new routines thsice_map_exf and thsice_get_exf provide the interface
908      - add an additional formal parameter to thsice_solve4temp
909    o pkg/exf:
910      - add new fields wspeed, snowprecip (to be able to couple to thsice)
911      - correct Stefan-Boltzmann constant
912      - new parameter for longwave surface emittance
913      - separate some stuff from exf_bulkformulae into new routines  
914        exf_radiation, exf_wind
915      - add new parameters and constants: longwave emissivity for ocean, ice
916        and snow, evaporation parameters over ice
917      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
918        either wind from stress or stress from wind
919    o pkg/thSIce:
920    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
921    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
922       and THSICE_CALC_THICKN
923    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
924    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
925      to make debugging easier.
926    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
927    o pkg/bulk_force:
928      - clean-up comments and parameters ;
929      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
930    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
931      generate new output for test-experiment: aim.5l_cs.thSI
932    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
933      testreport accordingly
934    
935    checkpoint58e_post
936    o SEAICE_CGRID adjoint done
937    o R_STAR adjoint implemented.
938      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
939      * need to sort out init. of h0facc, etc.
940    o Make pkg/profile fully independent of ecco,cost, etc. stuff
941      to be able to use it in pure forward.
942    
943    checkpoint58d_post
944    o upgrade simple test-experiment to tutorial example:
945     step.1: duplicate the experiment and (step.2) will remove the old copy.
946      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
947      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
948      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
949      tutorial_global_oce_biogeo    <- copy of dic_example
950      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
951      tutorial_plume_on_slope       <- copy of plume_on_slope
952      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
953      tutorial_global_oce_optim     <- empty for now (David ?)
954      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
955     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
956    o correct a sign problem in cost_scat.F
957    o obcs and ptracers: fix boundary conditions for advections schemes
958      with larger stencil
959    o thsice adjoint: start
960    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
961      completeness
962    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
963      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
964    o ptracers adjoint:
965      * avoid extensive recomputatations
966      * fix missing re-init. of gptr (missed by TAF)
967    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
968      me to turn off the excessive output to STDOUT that this package produces
969    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
970      and add those terms in Vector-Invariant formulation.
971    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
972      if the control period (xx_hfluxperiod etc) is 0
973    o in profiles pkg, clean routines and fix details
974    o in ecco pkg, reading ssh data:
975      fix problem in case the model does not start at iter0=0
976    o fix mnc-pickup/restart for ptracers
977    o new package prifiles:
978      code to compute profile-based cost by Gael Forget
979      (modifs in ecco, ctrl, autodiff)
980    o Benign bug fix in initialization (spotted by M. Mazloff) of
981      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
982    
983    checkpoint58c_post
984    o adjoint: finish NLFS adjoint and provide reference output in
985      verification/global_ocean.90x40x15/results_ad_nlfs
986    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
987      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
988      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
989      with SEAICE_CGRID defined.
990    o move calendarDumps from "data" to "data.cal" and clean-up the code
991      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
992    o add useEXF & useCAL flags (for now, set in hard-coded way)
993    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
994      (were missing in NH mode, and wrong in quasihydrostatic mode).
995      waiting for Chris updated version of calc_gw to add those CALLs.
996    o fix bug in quasihydrostatic S/R ;
997      add a test for this option: global_ocean.90x40x15.qshyd
998    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
999      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1000    o add on/off flag useOffLine for package OFFLINE
1001    o seaice:
1002      - modify advection so that it works also on the C-grid
1003      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1004        problem in multi-tile runs with C-grid
1005      - add flags for clipping ice velocities and/or masking solver forcing
1006      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1007        C-grid solver
1008      - added a few comments to seaice_diffusion.F
1009      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1010        are now exclusive)
1011      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1012        required re-ordering the code a little:
1013       + make DAIRN global variable (defined in SEAICE)
1014       + move computation of the viscosities eta and zeta into a new separate
1015         routine (because I need to recompute them in seaice_ocean_stress.F)
1016    
1017    checkpoint58b_post
1018    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1019      update output.txt of exp. aim.5l_cs.thSI
1020    o various mnc cleanups and improvements:
1021      + shrink lookup tables by factor of ~4
1022      + better error reporting when running out of lookup space
1023      + able to handle longer path/file names (up to 500 chars)
1024    o adjoint:
1025      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1026      - TBD: "hidden" mom_vecinv recomp. in dynamics
1027    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1028     (allow to differentiate between forcing components using new integer flags:
1029      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1030     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1031    o ecco
1032      - enable trend removal from SSH anomaly obs.
1033    o adjoint
1034      - a fix for PmEpR when #undef EXACT_CONSERV
1035      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1036      - try to fix "hidden" recomp. in forward_step for NLFS
1037        (NLFS seems broken sometimes after I checked it in)
1038    o seaice:
1039     - add c-grid version of the dynamic solver:
1040       + three new routines that are the c-grid substitute lsr, dynsolver
1041         and ostres
1042       + put a few fields that were local to dynsolver into global common
1043         blocks, so that I can move the computation of stresses etc into
1044         seaice_lsr (saves coding but may break the adjoint).
1045     - replace more hardwired parameters by runtime parameters
1046     - add ice masks that mask the rhs of the implicit solvers where there
1047       is no ice (commented out in seaice_dynsolver, because i am not sure
1048       if this works properly), eventually this should replace the clipping
1049       of ice velocities in seaice_dynsolver to +/-40cm/s.
1050    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1051      include it only where its needed
1052    o move balancing of fluxes before the call of external_forcing_surf
1053    o seaice:
1054      - correct units of turning angles (now they are really in degrees)
1055      - move computation of GWATX/Y out of main routine into dynsolver
1056      - initialize GWATX/Y in seaice_init
1057    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1058      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1059    o seaice: add runtime flags for turning angles (default to zero)
1060    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1061      and trend from exf forcing and ctrl control adjustments
1062    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1063      (since checkpoint57x_post)
1064    o change the default rotation period to 86164.s = the Earth rotation
1065    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1066      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1067    o seaice advection: add code for choosing between the default (2nd order
1068      central differences) and multiDim advection schemes provided by
1069      pkg/generic_advdiff
1070    o seaice:
1071      - removed all references to SEAICE_GRID.h fields from
1072        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1073        (cubed-sphere configuration will change a little)
1074      - grid computations in seaice_init are obsolete now.
1075      - cleaned up code a little so that is easier to read (hopefully).
1076      - added new (better?) discretizations of default advection and diffusion
1077        (turn on with SEAICEuseFluxForm)
1078      - replace 1 in 3d global fields by kSurface in growth.F
1079      
1080    checkpoint58a_post
1081    o seaice:
1082      - bug fix in advect.F
1083    o shelfice:
1084      - separate shelfice load anomaly from pload (breaks with time
1085        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1086        Its default is 0., but it may be computed more cleverly from (unknown)
1087        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1088        done offline. A good approximation of the pressure load anomaly is
1089        necessary to avoid large initial adjustment processes underneath
1090        deep-reaching shelfice.
1091      - small fix in ISOMIP shelfice_thermodynamics
1092      - add more sophisticated thermodynamics of Hellmer (1989), this is
1093        now the default
1094      - give a few constants more intuitive names
1095    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1096      if bulk formulae are used in long integration (especially EmPmR). Turn
1097      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1098      if balancePrintMean, the imbalance that is substracted is printed to
1099      STDOUT.
1100    o fix bug (typo) in obcs_apply_eta.F
1101    o add a new package shelfice which enables us to model the circulation
1102      underneath shelf-ice with draughts of hundreds of meters.
1103     - works
1104     - to do: + include improved thermodynamics
1105              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1106                instead of new field kTopC
1107              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1108                instead of new field R_shelfIce and new code in ini_depth.F
1109                and ini_mask_etc.F?
1110              + adjust vertical mixing schemes?
1111    o seaice pkg:
1112     - add a cpp-flag to include a simple formula for a salinity dependent
1113       freezing point of sea water at the surface
1114     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1115       meridional stresses are now different (and hopefully correct)
1116    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1117       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1118       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1119    o pkg/diagnostics: add options and parameters for regional-statistics
1120       diagnostics ; define regions by reading a region-mask from a file
1121       (might add other options later)
1122    o pkg/bulk_force:
1123     - add option and parameters to use AIM surface-flux formulae.
1124     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1125       others forcing fields (defined in PARM05, parameter file "data") are loaded
1126       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1127     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1128     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1129     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1130       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1131     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1132    
1133    checkpoint58
1134    o add "--embed-source" option to genmake2 which, when the supporting
1135      tools can be compiled (as determined by genmake2) will turn on the
1136      embed_files package which then embeds the entire MITgcm source code
1137      (*.[fFhc] + Makefile) used for the build within the executable
1138      - requested by CNH but off by default
1139      - adds a paltry <9MB to the mitgcmuv executable in most cases
1140      - only writes the output when useEMBEDSRC in eedata is true
1141    o clean up 3-dim. relaxation codes:
1142      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1143      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1144      * Thanks to Tom Haine for testing!
1145    
1146    checkpoint57z_post
1147    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1148      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1149    o fix the pickup behavior for obcs in combination with ptracers
1150    o fix a bug in ptracers_external_fields_load
1151    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1152      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1153    o transfered surface NH pressure to eta field (if exactConserv).
1154    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1155         and update lab_sea output.txt file.
1156    o completing 3-dim. relaxation code: additional term
1157         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1158      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1159      * At compile time, in "EXF_OPTIONS.h" set
1160          #define  ALLOW_CLIMTEMP_RELAXATION
1161          #define  ALLOW_CLIMSALT_RELAXATION
1162      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1163          tauThetaClimRelax3Dim = 15552000.0,
1164          tauSaltClimRelax3Dim  = 15552000.0,
1165      * 3 cases:
1166          1) Use a constant-in-time 3-dim. field
1167          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1168          3) Real-time relax. to time-evolving prescribed field
1169    o Adding Laplacian-type smoothness constraint on
1170      initial and boundary (forcing) controls (ic, bc)
1171      * enable at compile-time via
1172        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1173      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1174      * Absolute scale somewhat unclear so far
1175      * no area weighting was included since no other cost term does so far
1176    
1177    checkpoint57y_post
1178    First step for a NLFS adjoint
1179    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1180    o new init. routines for calc_r_star, calc_surf_dr
1181    o still need to deal with ini_masks_etc
1182    o testreport seemed happy
1183    checkpoint57y_pre
1184    
1185    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1186    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1187    o add new offset feature to offline pkg (plus minor cleanup)
1188    o cfc fixes for final year of integration
1189    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1190      be in GCHEM_OPTIONS).
1191    
1192    checkpoint57x_post
1193    o fix testreport Pb in multiple test experiment.
1194    o cleanup our namelist syntax in verification:
1195      - make it more F95 standards compliant (some work still needed)
1196      - allows the vast majority of our tests to work with gfortran
1197    o Non-Hydrostatic:
1198     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1199     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1200    o Allow to apply AB on T,S rather than on AB(gT,gS):
1201     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1202     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1203       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1204     - need a "clever" read_pickup to restart from the other AB formulation
1205    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1206    o remove some unused variables (reduces number of compiler warnings)
1207    o adjoint
1208      * Disable useVariableViscosity for adjoint for time being
1209        (there are a number of extensive recomputations)
1210      * Initialize certain variables needed for adjoint
1211    
1212    checkpoint57w_post
1213    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1214                 fix the singleCpuIO RS version of MDSWRITEFIELD
1215       and add a WARNING if using globalFiles=T with multi-processors.
1216    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1217      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1218    o tracer advection scheme:
1219      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1220       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1221       was not very convenient).
1222      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1223       (further tests needed for the implicit DST & Flux-Limiter schemes).
1224    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1225      and sRef for convenience, handy, when you want to initialize
1226      ptracers in a large domain with a constant non-zero value. Also,
1227      untangle ptracers_init.F a little.
1228    
1229    checkpoint57v_post
1230    o change dome exp. to use variable viscosity in side-drag terms.
1231    o remove all the files from the cfc_offline test since they are now
1232      incorporated into tutorial_cfc_offline which has been producing
1233      identical results for a few days of testing
1234    o add new parameter: sideDragFactor to enable half-slip-side BC
1235      and change side-drag S/R to use viscosity from mom_calc_visc
1236      (can switch back by setting sideDragFactor=0.); affects results at
1237      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1238       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1239    o vorticity & strain are now computed without masking, to account for
1240      no-slip-side BC in variable viscosity calculation ; mask is applied
1241      anyway later on, before computing advection/coriolis terms.
1242    o modify exp4 to test new obcs support for reading from external files
1243      and for passive tracers
1244    o fix behavior of ptracers_monitor when monitor output is written to a
1245      netcdf-file; still not independent of monitor.F (writes in the same
1246      file).
1247    o change default value of tRef (put a uniform, meaningful value for ocean
1248      & atmos) and initialize sRef (was missing, as Martin mentioned).
1249    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1250      to be proportional to enstrophy dissipation length.  Thus,
1251       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1252      This is now consistent with Smagorinsky and with the manual.
1253    
1254    checkpoint57u_post
1255    o OBCS and PTRACERS: add open boundary support for passive tracers
1256      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1257        OB-values from file; this is not different from the way theta and salinity
1258        are treated
1259      - however, Orlanski-radiation conditions are not supported, and the model
1260        will stop if you use pTracers and Orlanski at the same time.
1261      - beefed up the rountine obcs_external_fields_load: now only those open
1262        boundary values are overwritten with values from files for which there
1263        are really files, otherwise the OB-fields remain untouched. This makes
1264        it possible to use different OBs at different ends of the domain (as
1265        with EXF)
1266    o reduce number of exch calls in shap_filt (s2).
1267    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1268      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1269    
1270    checkpoint57t_post
1271    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1272    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1273      same truncation, independent of the face number: affects affects several
1274      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1275    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1276      note that biharmonic viscosity + no-slip was not tested in any experiment.
1277    o fix bug in non-linear free-surf side-drag ; generate new output for
1278      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1279    o make mnc honor the writeBinaryPrec flag for most kinds of output
1280    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1281    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1282      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1283    o add brackets in multi-terms sum to get same truncation, independent of
1284      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1285      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1286    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1287      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1288      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1289      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1290      Suggested values of viscosity parameters found in mom_calc_visc.
1291      Many new viscosity diagnostics available.
1292    
1293    checkpoint57s_post
1294    o Add clearing-house for viscosity calculations, mom_calc_visc and
1295      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1296      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1297      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1298      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1299      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1300      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1301      ViscAhStrain and viscAhTension are now retired.
1302    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1303    o In response to JMC's bug report, genmake2 now ignores any soft-links
1304      that it finds in the *current* directory when searching for files.
1305      Soft-links found in any other source directories will still work as
1306      they did before.
1307    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1308      a C routine to unlimit the stack size
1309    o mnc-ify pkg/aim snapshot vars
1310    o mnc-ify pkg/land as requested by Daniel
1311    o various changes to mnc including:
1312      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1313      - output can now be grouped so that all files within a group
1314          change the ITER portion of their names in lock-step together
1315      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1316          and works with both EXCH1 and EXCH2 (but needs more testing)
1317      - writing works for all verification test cases w/ g77 on Linux
1318    
1319    checkpoint57r_post
1320    o make MNC variable initialization happen earlier
1321    o add diagnostics for (almost) each term of the momentum Eq.
1322    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1323    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1324    o remove MINIMAL_TAVE_OUTPUT option ;
1325      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1326    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1327      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1328    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1329    o add time-dependent SST, SSS control
1330    o cost terms in ecco/ modularized (new cost_generic.F)
1331    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1332    o new infrastructure for seaice model vs. obs misfits in seaice/
1333      * driver from the_main_loop.F is seaice_cost_driver.F
1334      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1335      * gradient check in Exp. 6a of natl_box_adjoint/
1336    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1337      (see README file)
1338    
1339    checkpoint57q_post
1340    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1341    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1342      - bug was reported by Jean-Michel and Ian Fenty
1343    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1344      update exp. cpl_aim+ocn output.
1345    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1346      Needed for high-res. runs with large global files
1347      to be able to limit tapelev size
1348    o Changed some tests for adjoint:
1349      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1350      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1351      * global_ocean.90x40x15/ back to default 3-level checkpointing
1352    o Modifications to enable scripted COMMON to MODULE conversion
1353      * verification/OpenAD/code/ has necessary scripts and description;
1354      * converts, compiles and runs successfully;
1355    
1356    checkpoint57p_post
1357    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1358    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1359      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1360    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1361    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1362      (was already the case for dissipation with mom_vecinv,
1363       and also the case for grad.PhiHyd when staggered-timeStep)
1364      This will allow to put dissipation out-off the AB time-stepping.
1365     Unfortunately, affects truncation error. Update output of exp. that "fails"
1366      (cg2d matching number) and leave the others for later: front_relax(10),
1367      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1368      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1369    
1370    checkpoint57o_post
1371    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1372      (2) its ready to be documented during the 20050801 DocFest
1373    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1374      for ideal_2D_oce and lab_sea on linux_ia32_g77
1375    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1376      in global1x1_tot/code_seaice_adj to access indices 32, 33
1377      (worth another tag)
1378    
1379    checkpoint57n_post
1380    o adding precip control xx_precip 32
1381    o adding swflux control xx_swflux 33
1382    o Replacing 10 forcing penalty cost routines by 1 generic.
1383    o Implementing partitioning in time-mean and variable adjustment
1384      for atmos. state.
1385    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1386  o in natl_box_adjoint:  o in natl_box_adjoint:
1387    * updated: results_bulk/    * updated exp 1 to 10
1388    * not yet updated: results/, results_seaice/      (but does not have time-mean vs. variable split results yet)
1389    o updated global1x1/*_seaice_adj/
1390      to incorporate latest changes
1391    o enable useSingleCpuIO for mdsio vector routines
1392      (applies in particular to tapelev I/O)
1393    o removed inefficient K-loop in all active_file*control*.F
1394    
1395  checkpoint57m_post  checkpoint57m_post
1396  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)

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