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revision 1.519 by heimbach, Thu Jul 28 14:35:47 2005 UTC revision 1.952 by mlosch, Tue Feb 5 13:34:12 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 add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
8  o moved ptracer ctrl index 17 -> 32    usingSphericalGrid, this allows to define the rotated grid coordinates
9      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
10      geographical coordinates according to the inverse of the rotation defined
11      by the Euler angles, so that Coriolis parameter and online-interpolation by
12      exf works with the geographical coordinates on XC/YC/XG/YG.
13      Naturally, this feature does not work with all packages, so some
14      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
15      profiles), because there the coordinates are assumed to be regular
16      spherical grid coordinates.
17    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
18      - introduce isopycnal diffusion coefficient control.
19    o tools/adjoint_options:
20      - additional control vector components.
21    o pkg/mnc: have mnc create marginally meaning full coordinate variables
22      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
23    o pkg/mypackage:
24      - add example of read/write pickup for state-var ;
25      - add entry points to the main code for state-vars diags & write-pickup.
26    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
27      transitions for useExfYearlyFields
28      - add new subroutine that determines the file to read from for
29        use*YearlyFields = .TRUE. and .FALSE.
30      - add a verification experiment to global_with_exf that tests
31        useExfYearlyFields with USE_EXF_INTERPOLATION defined
32    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
33      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
34      subroutines (which could be generated from a template, because they are
35      almost identical), for now they are included in obcs_prescribe_read.F for
36      simplicity
37    o pkg/exf:
38      - add a little more diagnostic to exf_interp_read (in analogy to
39        mds_read_field, can be turned off with debugLevel < debugLevA=1)
40      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
41        ugly but fast by unrolling short inner loops, inserting a unroll=8
42        directive in routine lagran, and splitting a loop and making do while the
43        outermost loop (the latter requires the intoduction of index arrays)
44    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
45    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
46      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
47    o verification/seaice_obcs: updated for restart test and latest options
48    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
49      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
50      for now this is only available for the C-grid code and also within
51      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
52    
53    checkpoint59m
54    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
55      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
56    o gad_som : fix flux output (& diagnostics) to have same units as other  
57      advection scheme fluxes (was previously multiplied by deltaT).  
58    o added verification/seaice_obcs both to test seaice open boundaries
59      and to provide an example matlab scrpt for generating them
60    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
61    o pkg/salt_plume: clean up salt_plume_frac.F to
62      remove redundancy in PlumeMethod 1 and 4
63    o pkg/kpp: added saltplume diagnostics
64    o pkg/obcs and pkg/seaice:
65      - do not set uice and vice to zero when OB*icefile are unspecified
66      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
67      - moved seaice tracer obcs after call to seaice_growth
68    o pkg/salt_plume: added various options for salt plume depth
69      criterion and for vertical distribution of the salt
70    
71    checkpoint59l
72    o pkg/ptracers: new version of ptracers pickup:
73      read meta file and write only fields which are needed to restart.
74      ( same logic as main pickup file ; also using pickupStrictlyMatch )
75    o pkg/seaice:
76      - add timescale for melting due to warm mixed layer as a means of
77        setting SEAICE_availHeatFrac more conveniently
78      - add a CPP-flag/runtime parameter check for flooding algorithm
79      - reformulated availHeat in seaice_growth.F to be independent of AREA
80    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
81      unit changes
82    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
83    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
84      SX vector computer.
85    o pkg/seaice:
86      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
87        seaice forcing fields can now be read only through pkg/exf
88      - removed some unused halos
89    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
90    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
91      or U/VICE from U/VWIND before computing U/VSTRESS
92    
93    checkpoint59k
94    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
95      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
96    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
97      all experiments pass when compile with un-initialised var. checking option.
98    o added pkg/salt_plume
99    o script to test restart (for now, in MITgcm_contrib/jmc_script)
100    o pkg/seaice: new read/write pickup version.
101      read meta file and write only fields which are needed to restart.
102      ( same logic as main pickup file ; also using pickupStrictlyMatch )
103    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
104    o lab_sea.hb87: modify the domain & update output.hb87.txt :
105      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
106      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
107      process. Fixed here by closing the domain at the Northern boundary.
108    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
109    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
110      a set of consecutive levels in/from a 3-D array.
111    o pkg/ptracers:
112      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
113      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
114    
115    checkpoint59j
116    o in pkgs: dic, obcs, offline, rbcs:
117      standard way to compute coeff. for time interpolation between 2 time reccords
118      which retains full precision (& make results less dependent on compiler).
119      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
120    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
121      packages instead of reading ice cover and wind speed separately
122    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
123     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
124      to allow to compile customized code before the update)
125    o cleaning-up:
126      - fix CPP instruction syntax in pkg/obcs
127      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
128        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
129      - fix some threads issue in IO parts.
130    o pkg/dic:
131      - add tons of "_d 0" (--> much better testreports !)
132       and then update outputs of tutorial_global_oce_biogeo
133    o pkg/mom_fluxform:
134      add a special version of momentum advection intended to conserve momentum
135      next to a bathymetry step or a coastline edge. (default = off = #undef)
136    o new read/write pickup version:
137      - for now, only implemented for main (mdsio) pickup file.
138      - write out only what is needed to restart; merge pickup_nh , pickup_ph
139        and main pickup together.
140      - read meta file; read only what is needed to restart; stop if a field
141        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
142        if it make sense (even if the restart is not perfect).
143      - if no meta file, assume that pickup to read corresponds exactly to
144        a pickup that would currently be written.
145      - read pickup written in the old format (until checkpoint59i) if it
146        recognizes an old meta file (no field-list).
147      - add a meta file in exp. which starts from a pickup: 2 cases:
148        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
149         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
150        b) a meta file describing the content of the associated pickup file
151         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
152    o pkg/mdsio & pkg/rw:
153      - new routine to read a meta file ; new set of routine to read
154        Multiple-fields file (with meta file).
155    o added open boundary conditions capability for seaice
156        HSNOW, HSALT, UICE, and VICE
157    
158    checkpoint59i
159    o adjoint:
160      * fix multiDimAdvection adjoint
161        (partial recomputation problem by TAF for fVerT(:,:,kDown)
162        and comlev1 size definition (maxpass vs. max. number of tracers)
163      * verification/global_ocean.90x45x15 adjoint now tests
164        NLFS and multiDimAdvection using DST3 (=30)
165      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
166    o pkg/kpp: add "_d 0" to real constant (if missing);
167      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
168      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
169    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
170      for internal parameters related to restart process (formerly from PARAMS.h)
171      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
172    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
173      as argument. (only atm2d & obcs write_pickup have not yet been updated)
174    o pkg/monitor:
175      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
176      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
177      - account for deep Atmosphere factor and density factor (anelastic)
178    o added open boundary conditions capability for seaice HEFF and AREA
179    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
180      thermodynamics
181      - requires a little reorganization, which affects the testreport results
182        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
183        so that now the conservative form is tested
184      - add a few comments
185    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
186    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
187    o add new diagnostics to seaice: advective, diffusive fluxes (only for
188      multidim-advection, for scheme 2 they are not filled) and transports,
189      thermodynamic growth rates
190    o change units of EmPmR (inside the code, + within coupling interface)
191      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
192      Affects results @ truncation level (cg2d match) and update output of
193       experiments: lab_sea(6), global_ocean.90x40x15(10),
194      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
195      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
196      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
197      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
198    
199    checkpoint59h
200    o pkg/exf:
201      - improve vectorization by moving if-statement out of loops in
202        exf_mapfields, exf_radiation
203      - exf_bulkformulae.F: introduce 2D fields and vectorize code
204    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
205    o testreport:
206      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
207        monitor & update offline_exf_seaice exp. output.
208      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
209    o pkg/seaice:
210      - bug fix in the evp solver: boundary conditions were affected be
211        masking of zMax/zMin (changes results)
212      - minor bug fix in boundary conditions in seaice_calc_strainrates
213        (changes results for no_slip)
214      - seaice_lsr.F: make interpolation of eta dependent on boundaries
215      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
216      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
217        stress formulation and no-slip boundary conditions
218    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
219      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
220    o pkg/seaice: a first HSALT time stepping equation has been checked in
221    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
222      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
223      without requiring DO-IF statements
224    o pkg/thsice:
225      use continuous power-law function for partition of energy between lateral
226      melting/freezing and thinning/thickening ; old code using step function
227      still available with #undef THSICE_FRACEN_POWERLAW
228      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
229    o testreport: change AD testing : check against results/output_adm.txt
230      using same scripts as for forward test.
231    
232    checkpoint59g
233    o adjoint testing: in preparation for changing testreport:
234      - output format: cost and grad written on separated lines
235      - ad output results in directory "results" (instead of "results_ad")
236    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
237    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
238    o pkg/ecco: allow user defined cost function contributions
239    o testreport:
240      Allow to choose (per experiment) the list of tested output variables
241       and the main variable (used to issue a pass/FAIL ) ;
242      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
243      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
244      Also modify printing of summary:
245       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
246       b) echo the list of tested variables in the individual summary.txt of
247          each experiment.
248    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
249      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
250      (but still depend on the tile decompostion of the domain).
251    o pkg/seaice: change a discretization detail to make the B-grid code
252      "more symmetric". This change is likely to remove all "ridges/leads" that
253      where quasi-aligned with the grid in B-grid solutions. It may also be
254      the solution to the stress coupling issues with the B-grid.
255    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
256      remove .cvsignore from input dir. (since testreport no longer run here).
257    o pkg/thsice:
258     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
259     - fix reshaping of sea-ice just after advection:
260       melt all the ice only if ice-volume is too small.
261     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
262       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
263     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
264    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
265      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
266    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
267      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
268      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
269      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
270      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
271      -> update output.txt
272    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
273     this affects truncation error: -> update output.txt of exp:
274      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
275      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
276    
277    checkpoint59f
278    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
279    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
280      a bounded range (in forward mode)
281    o pkg/ecco, ctrl, autodiff and mom_common:
282     internal parameter controls, completements of implementations
283    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
284    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
285      (not seem any difference in testing results).
286    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
287       at face corners.
288    o pkg/generic_advdiff:
289     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
290      loop range indices for computing vertical advection tendency
291      and do the calculation in the interior only (no overlap) ;
292      for now, only implemented for SOM advection (to save CPU time).
293     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
294    o exch2 adjoint
295      First set of changes:
296      - add exch2 hand-written adjoint templates
297      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
298        This will require cleanup in pkg/autodiff/*.F
299        (changed routines currently kept separate in verif. code/)
300      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
301        that used to hide exch2 or cubed-sphere specific code
302        (commented via 'cph-exch2')
303    o pkg/seaice
304      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
305    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
306       output of global_ocean.cs32x15.thsice .
307    
308    checkpoint59e
309    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
310      for B-grid vector (not yet tested) and C-grid vector (<- only used
311      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
312    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
313      (#ifdef ALLOW_SALT_PLUME)
314    o gather_2d/scatter_2d: removed halo regions
315    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
316      scheme and the corresponding test case (under front_relax dir). For now,
317      only available with Skew-flux form and not yet tested in realistic set-up.
318      adjoint: store directives updated, but gradient checks deteriorated,
319      so maybe GM/Redi adjoint is now broken.
320    o seaice adjoint
321      * add AREA, HEFF, HSNOW as control variable
322        (should not change lab_sea results)
323      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
324    o pkg/seaice:
325      * added computation of saltFlux in seaice_growth;
326        For time being, sea ice salinity is assumed constant
327        contribution of snow flooding to freshening of sea ice is neglected.
328        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
329        defaults to 0.0 in order to maintain backward compatibility.
330        Typical values for SEAICE_salinity are 4 to 10 g/kg.
331      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
332      * added SEAICE_availHeatFrac, which specifies fraction of surface level
333        heat content used to melt or grow ice
334      * commented out cap of HICE: it helps keep ice thinner
335      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
336      * applied OBCS T/S mask to HEFFM sea ice mask
337    
338    checkpoint59d
339    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
340     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
341     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
342    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
343     and change default value of parameter "GM_Small_Number";
344     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
345       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
346       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
347    o pkg/ecco: cost function when applying pkg/smooth to controls
348    o pkg/ctrl: add forcingPrecond run time parameter
349    o pkg/seaice:
350     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
351     - fix bug in metric terms of u-equation in LSR solver (implicit part),
352       changes verification/lab_sea
353     - rearrange implicit part of u-equation in LSR solver to make it easier to
354       read, understand, and debug. This causes changes at the truncation level.
355     - fix (serious) bug in the boundary conditions (sign error in the implicit
356       part) of the LSR solver. Changes all LSR results.
357     - fixed problem with HSNOW initialization to avoid thick snow when AREA
358       is initilized with small values - does not change lab_sea results.
359     - added HsnowFile initialization capability
360    o pkg/smooth: addition to model/src and pkg/ctrl so allow
361     initialization of pkg/smooth and application to control vector
362    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
363    o dependencies: pkg/profiles requires pkg/cal
364    o pkg/profiles:
365     - added option ALLOW_PROFILES_GENERICGRID
366         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
367         that interpolation information (grid points and coefficients) is provided
368         within the netcdf input files.
369         -> sample matlab scripts can be found in MITgcm_contrib/gael
370         that allow you to prepare netcdf input files.
371     - also modified: cleaner include statements, cleaner error print statements,
372       cleaner stops when error, and more tests of the netcdf input files consistency.
373    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
374    o pkg/seaice:
375     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
376       requires a new routine: seaice_diagnostics_fill.F
377     - make sure that seaice does not move if not forced (pressure replacement
378       method, Hibler and Ip, 1995), changes results
379     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
380     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
381       It is turned off by default (=-1.), because it changes the results.
382     - make it possible to read AREA from a file, too.
383    
384    checkpoint59c
385    o add S/R and diagnostics for oceanic mixed-layer depth
386    o move GMRedi call after all vertical mixing schemes (including KPP)
387    o pkg/thsice:
388     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
389      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
390    o pkg/obcs:
391     - bug fix for balance code
392    o pkg/seaice:
393      - allow values of SEAICE_elasticParm > 1
394      - add new parameter SEAICE_evpTauRelax as an alternative
395        to SEAICE_elasticParm
396      - make lsr boundary conditions free slip (by default), changes result
397      - add code for no slip boundary conditions for lsr
398      - set minimum of zeta to zero (and not 4e8) (changes results)
399      - add a cap on AREA after advecting AREA if seaice_growth is not called
400    o change calculation of Visbeck K:
401      - no longer depend on tapering scheme; instead, compute slope (limited
402        by GM_maxSlope). this is equivalent to what was comuted before with
403        clipping or linear tappering.
404      - fix vertical averaging (wrong by 1/2 level)
405      - leave the old version (but will not be maintained) within
406        #ifdef OLD_VISBECK_CALC / #endif
407      - update output of exp. ideal_2D_oce
408    o change error catch in calc_r_star to improve vectorization
409    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
410      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
411    o adjoint:
412      Re-organized adjoint checkpointing according to Matt Mazloff
413      (but with modifs/completions/cleanups)
414      Storing is now bundled into large arrays to optimized I/O
415      (and second step in cleanup of the_main_loop)
416    
417    checkpoint59b
418    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
419      - export/import (between ocean & coupler) fields needed for ocean DIC.
420    o pkg/seaice:
421      - get rid of three more exchanges seaice_calc_viscosities (required
422        different loop boundaries in seaice_lsr and seaice_ocean_stress)
423      - bug fix in seaice_ocean_stress (update of lab_sea required)
424      - reduce loop boundaries to necessary minimum also in seaice_evp
425      - go back to the old way of computing deltaC/Z as the adjoint likes that
426        better
427    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
428      passive tracer to an Age Tracer) + update output.txt
429    o pkg/exf:
430      - implement A-grid / C-grid selection for wind-stress input files.
431      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
432      for now, in exf_bulk_largeyeager04.F only :
433      - change implementation for case where windspeed + 2. components wind-stress
434        are read-in. AND use rhoConstFresh to convert evap.
435    o pkg/seaice:
436      - use correct EXCH_UV for wind-forcing (on A-grid).
437      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
438        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
439    o pkg/exf:
440      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
441      EXF_INTERPOLATION:
442      - merge global_with_exf/code version of exf_interp_read.F
443        to the main code ;
444      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
445        reading the file ; Important: This options needs to be defined to recover
446        previous code.
447        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
448      - no longer loose real*8 precision along the way when using exf_iprec=64.
449    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
450      - change discretisation of evp-solver in order to avoid another exchange
451        (changes lab_sea) and clean up a little
452      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
453        help the adjoint (this also changes the results slightly)
454      - add a few "_d 0" where they had been missing in seaice_evp.F
455      - cleaning up: remove unused seaice_calc_rhs.F
456    o pkg/exf: some cleaning-up:
457      - change various "constants" into runtime parameters
458      - cleaned-up Large&Yeager04 routine which should eventually
459        replace exf_bulkformulae.F (changed names of S/R and CPP)
460        and merged various ALLOW_ATM_WIND options
461     only used with thsice pkg (in thsice_get_exf.F):
462      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
463        which are used when useStabilityFct_overIce=TRUE (= the default)
464      - change default values of ice & snow emissivity and scale downward LW
465        by ice & snow emissivity.
466    o pkg/thsice:
467     fix few little problems, in thsice_calc_thickn.F:
468      - growth vertically (and not laterally) if iceFrac == iceMaskMax
469      - melt only laterally if hIce < hThinIce (as the comments say)
470      and in thsice_extend.F:
471      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
472      - start to form ice as soon as the minimum ice-volume is reachable.
473     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
474      and cpl_aim+ocn
475    o pkg/kpp
476     - move computation of surface related input fields to KPP into a new
477       subroutine kpp_forcing_surf.F
478     - remove wrong (within bi,bj loops) EXCH calls.
479     - little cleaning (add argument myThid in last position, cvs header ...)
480     - for now, fix conservation problem by exchanging KPPviscAz (may not
481       be the best fix)
482    o pkg/seaice
483     - check for inconsistent evp parameter/cpp-flag combination
484     - remove leftover errIO flat for obsolete name list error handling
485    o OpenAD
486     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
487    
488    checkpoint59a
489    o pkg/seaice: some parameter clarifications and a little bit of clean up
490    o pkg/thsice: rename run-time parameters:
491       himin       -> hIceMin
492       himin0      -> hThinIce
493       hihig       -> hThickIce
494       i0          -> i0swFrac
495       transCoef   -> bMeltCoef
496       frac_energy -> fracMelting
497      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
498       with default values (for now) that do not change the results.
499      remove old version of thsice vars advection in pkg/seaice.
500    o in FFIELDS.h:
501      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
502      - make pLoad & sIceLoad always available (but still only used if
503         ATMOSPHERIC_LOADING is #define).
504    o pkg/kpp: replaced _KPP_RL with _RL
505    o bug fixes for vertical diffusivity computations when both KPP and
506        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
507        are no longer updating the vertical diffusivity array
508        (passed as argument) but are (re-) setting those arrays.
509    o pkg/seaice: fix bug in evp solver, while doing that
510      - change (improve?) discretization of stress computations for both
511        cgrid-lsr and evp solver
512      - add a new routine to compute strain rates
513      - the above changes lab_sea results
514      - add no slip conditions for evp solver (off by default), lsr-version
515        may follow
516      - fix exchange for shear at Z-points (does not change lab_sea)
517      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
518        (to force the user to pick a time step since there is not "safe" way
519        of choosing it)
520      - add principal stress diagnostics
521      - rearrange fields for evp a little to avoid having to call a: too many
522        exchanges and b: exchanges for stress trensor components which we do
523        not have.
524      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
525        of evp, complete rewrite for lsr case (latter is does not yet work
526        in all cases)
527    o pkg/kpp: add code to have mixing in shelf ice caverns
528      - add myThid to all kpp routines (long overdue)
529    
530    checkpoint59
531    o pkg/exf:
532      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
533        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
534      - move exf header files from lower_case.h to UPPER_CASE.h ;
535        add missing cvs Header & Name
536      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
537      - add namelist param. selectStressGridPosition, exf_monFreq
538      - retire many _CLIM routines, and remove data.exf_clim
539        + params moved to data.exf
540        + climsst, climsss now handled by exf_set_gen, i.e.
541          climss?period=0 refers to constant field,
542          climss?period=-12 to monthly forcing
543      - split up namelists in data.exf
544    o pkg/seaice:
545      - remove seaice_exch and seaice_exch_uv
546      - remove superfluous exchange of theta
547      - add myThid to seaice_budget_ocean/ice
548      - add new interface for atmospheric wind forcing (C-grid only)
549        + new routine
550        + two new field (taux, tauy for stress over ice)
551        + removed one global field (DAIRN) for C-grid case only
552    o pkg/thsise
553      - 2nd set of modifs for thsice adjoint in conjunction with exf
554    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
555    
556    checkpoint58y_post
557    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
558      vertical diffusivity, similar to that in MOM4; turned on using
559      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
560      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
561    o Added capability for 3D specification of background vertical diffusion
562      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
563      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
564      "data" file that contains the 3D vertical diffusivity coefficients.
565    o ice dynamics (pkg/seaice) with thsice thermodynamics:
566      - add code within pkg thsice to advect & diffuse sea-ice fields
567      similar to (and will replace) what has been added in  seaice_advdiff.F,
568      but: - conserving Mass, Heat & Salt.
569           - better when using non-linear advection scheme (not yet fully tested)
570           - can also be used in atmospheric set-up (for now, only the diffusion).
571    
572    checkpoint58x_post
573    o IO option for global-file compact format:
574      - add options when generating topology (utils/exch2/matlab-topology-generator)
575      - add I/O capability (pkg/mdsio).
576      - adapt utils/matlab/rdmds.m to read this format.
577      for now long-line format not yet supported by pkg/mdsio (& exch2).
578    o shelfice: add a few diagnostics
579    
580    checkpoint58w_post
581    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
582      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
583      (and replace horiVertRatio in NH code).
584      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
585                         and tutorial_plume_on_slope (sensitive to truncation)
586    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
587      directly to drive seaice model (C-grid only)
588    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
589     - reintroduce computation of wind from stress,
590     - compute tau (in exf_bulkformulae.F) from windstress averaged to
591       mass points to avoid tau = 0
592     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
593    o rdmnc.m: make it work with "global" files created with gluemnc
594    o rdmnc.m : some improvements in dealing with singleton dimension
595      (tested on all testreport mnc output files).
596    o genmake2: disable pkg/profiles if netcdf test fails.
597    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
598    o move call to cal_readparms up to make calendar parameters/variable available
599      to all packages
600    
601    checkpoint58v_post
602    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
603      useDynP_inEos_Zc tested.
604    o pkg/exf: changes to properly interpolate/mask/scale initial fields
605    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
606      and portions thereof.  See read_cs.txt for description and examples.
607    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
608      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
609      following the great-circle arc between those 2 points.
610    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
611      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
612    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
613     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
614     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
615     - still needs work (not working with some options ; efficiency to improve)
616       and serious testing.
617     - use this scheme for temperature & salinity in 2 advection test exp.:
618       advect_xy & advect_xz, respectively.
619    
620    checkpoint58u_post
621    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
622    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
623    o testreport: add option "-skipdir" to skip some test.
624    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
625      momentum calculation.
626    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
627    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
628      remove checkpoint.F and the_correction_step.F (no longer used);
629      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
630    o add option (linFSConserveTr) to correct for tracer source/sink due to
631      Linear Free surface
632    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
633    o pkg/thsice: fix reading mnc-pickups
634    
635    checkpoint58t_post
636    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
637    o pkg/mdsio:
638     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
639       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
640       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
641     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
642     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
643       either MDS_READ_FIELD or MDS_WRITE_FIELD )
644     - new S/R (to replace MDSWRITEMETA), which allows to write more
645       informations (variable names, time ...) to meta files.
646     - modify rdmds.m to give back the meta file content.
647    o pkg/diagnostics: change vertical interpolation to be safer, and more
648       flexible (define p-levels to interpolate to in data.diagnostics);
649      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
650       diagnostic pointer.
651    o pkg/seaice: more cleaning up of seaice_growth, added many comments
652    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
653    o fix multi-category seaice:
654     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
655       SEAICE_MULTICATEGORY
656     - fix short wave heat flux
657    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
658       and allow to use EVP solver. Change forward lab_sea: test both EVP
659       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
660    o Initial check-in of lab_sea adjoint
661      (very similar to natl_box_adjoint/code_seaice)
662      * used C-grid and EVP solver
663      * used KPP, GM/Redi
664      * uses inAdExact=.TRUE.
665      * gradient checks fail for both ADM and TLM
666        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
667        f.d. gradients actually seem more problematic than ADM, TLM gradients;
668        issue is related to forward mismatch between g77 an ifort
669    o pkg/seaice: overhaul of thermodynamics
670     - growth.F and groatb.F are replaced by new routine seaice_growth.F
671     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
672     - move a few global fields out of SEAICE.h into seaice_growth.F and
673       make them 2D (FICE/QNETO/ ...)
674     - remove FO (it is the same as QNETO)
675     - introduce a few local fields to avoid modifying external fields such
676       as atemp, etc.
677    
678    checkpoint58s_post
679    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
680      changed exf_set_gen.F so that
681        genperiod=0 means input file is one time-constant field and
682        genperiod=-12 means input file contains 12 monthly means
683    o CG2D: use pre-computed solver main-diagonal (stored in common block);
684      this affects truncation error ; generate new output file for exp. which
685      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
686        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
687        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
688        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
689        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
690        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
691    o start implementation of deep-atmosphere and anelastic formulation
692    o verification: remove 2nd copy of input files and use script "prepare_run"
693      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
694    o mom_common/vecinv/fluxform: fix a few initialisation isssues
695    o profiles: fix for multithreaded case
696    
697    o diagnostics: rename few diags:
698      s/'PRESSURE'/'RCENTER '/g
699      s/'TICE    '/'oceFreez'/g
700      s/'TAUX    '/'oceTAUX '/g
701      s/'TAUY    '/'oceTAUY '/g
702      s/'SWFLUX  '/'oceQsw  '/g
703      s/DIFx/DFxE/g
704      s/DIFy/DFyE/g
705      and add few ocean-forcing diagnostics:
706      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
707    o modifications to pkg/seaice/growth.F and budget.F, which change results of
708      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
709      as actual snow thickness.  It now refers everywhere to effective snow
710      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
711    
712    checkpoint58r_post
713    o modifications to pkg/seaice/growth.F, which change results of
714      lab_sea experiment: fixes pertain to melting snow over open water, to
715      masking EVAP under sea ice, and to using the correct AREA variable for
716      computations of EVAP, PRECIP, HSNOW, and GHEFF
717    o add ability to read bathy, salt, and theta using MNC (off by def)
718    o add flooding algorithm and advection of HSNOW for pkg/seaice;
719      both are turned off by default and do no change any results
720    o seaice advection with pkg/thsice: a step toward the use of non-linear
721      advection scheme, but #ifdef or commented out for now (requires more EXCH).
722    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
723      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
724      in natl_box (affects results @ truncation level: update output.txt)
725    o multi-threading and IO:
726      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
727      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
728        (needed to work with SingleCpuIO): tested in all verif. exp.
729    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
730      affects the results (but none of the verification test uses this scheme).
731    o Adding some pkg/diagnostics capability to pkg/seaice
732      (will certainly be subject to changes)
733    o ctrl: adding new control variables:
734      lwflux, lwdown, evap, snowprecip, apressure, runoff
735    
736    checkpoint58q_post
737    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
738      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
739      high_res_cube configuration by 4% on Columbia.
740    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
741      add (in global_with_exf/code) a version of EXF_INTERP_READ without
742      dynamical allocation (seems to work in multi-threaded).
743    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
744      single CPU io) so that TAF does not have to see EESUPPORT.h
745    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
746    
747    checkpoint58p_post
748    o obcs: stop if obcs is used with useCDscheme = .true.
749    o shelfice:
750     - fix a sign error so that no slip at shelfice interface works
751     - remove stop for combination non-hydrostatic code and shelfice. That does
752       not mean, that the results are correct, but at least they are numerically
753       stable
754    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
755    o added adjoint exch routined for all exch*3d* routines
756      and updated flow directives
757    
758    checkpoint58o_post
759    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
760      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
761    o change controling S/R for writing pickup file (new S/R do_write_pickup)
762      and clean-up reading/writing of pickup files.
763    o fix local version of read/write pickup (NH part) in rotating_tank/code
764    o simplify EXCH interface:
765     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
766     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
767    o added the regrid package
768    o shelfice:
769     - add a simple boundary layer scheme to reduce noise
770     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
771    
772    checkpoint58n_post
773    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
774       local variable (not in common block).
775    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
776      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
777      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
778        to work with SingleCpuIO.
779    o add "_d 0" to real constant of pkg/cfc subroutines ;
780       update exp. cfc_exemple & tutorial_cfc_offline output files.
781    o multi-threading and IO:
782      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
783        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
784      - barrier before and after reading.
785      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
786      - avoid using MDS_WRITELOCAL for LAND pkg output.
787      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
788        common-block variables ; Allows multi-threading with master-thread IO.
789    o change default MAX_NO_THREADS from 32 to 4 ;
790      and stop cleanly when MAX_NO_THREADS is too small.
791    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
792    
793    checkpoint58m_post
794    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
795       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
796    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
797       keep global_ocean.90x40x15 (for AD testing) with former secondary test
798       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
799    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
800        add MITgcm_tutorials (= code + all the tutorials)
801    o ecco, option to compute cost for total ssh (mean+anom)
802    o consistent with addition of ptracer and ssh in pkg/profiles
803    o profiles: adding ptracer and ssh
804    o testreport: change multi-test output-file name
805      (from output.txt.{name} to output.{name}.txt)
806    o profiles: now ok for mutli-tiles case
807    o seaice: add 4 parameters for different advection schemes for area,
808      (effective) seaice thickness, enthalphy, and snow height. Their default
809      is the standard parameter SEAICEadvScheme
810    o calc_gw:
811     - add cosFacU in zonal viscous flux (harmonic.visc.).
812     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
813       of tutorial_plume_on_slope.
814    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
815    o calc_gw: true flux-form, account for horizontal grid spacing.
816      update rotating_tank results, but not plume_on_slope (affected at
817      truncation level, 11 digits).
818    
819    checkpoint58l_post
820    o calc_gw:
821     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
822     - remove side-drag for now (need to fix it); update plume_on_slope results.
823     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
824    o commit code to make SST/SSS weights spatially variable
825      (based on either variable in-situ or variable initial T/S weights)
826    o pkg/ecco:
827      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
828        now based on horizontally varying weights wthetaLev, wsaltLev
829      * cost_averagesflags now returns year indices in addition to day, month
830      * sflux balance is performed on annual basis
831        (sflxumm, sfluxmm2, bal_sfluxmm)
832      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
833        including separate counting and multipliers
834    o pkg/rbcs
835      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
836    
837    checkpoint58k_post
838    o testreport:
839     - always build in dir. "build" (if not there, mkdir build instead of building
840       & running in input)
841     - run in dir run (if it exists), in build otherwise.
842     - call prepare_run (if input/prepare_run exists)
843     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
844    o pkg/exf modifications to interpolation and rotation routines for more
845       reasonable treatment of North Pole singularity: for tracers North Pole
846       value is set to northernmost zonal-mean value, for zonal velocity it is
847       set to zero, and for meridional velocity it is set to northernmost value.
848    o pkg/exf/exf_check_range.F
849     - add tile index to diagnostics and move stop statement to the very
850       end of the routine.
851    o pkg/diagnostics: (diagnostics_main_init.F)
852      define title of isomorphic variables according to the current config.
853    o pkg/thsice with pkg/seaice dynamics:
854    - fix domain of computation (interior only, required for exf) and do exchanges
855    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
856    o towards a standard way of dealing with multi-threading in MONITOR
857      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
858    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
859       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
860    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
861    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
862    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
863       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
864    o tracer advection:
865     - clean-up and simplify calc_common_factors.F
866     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
867       advection subroutine (but still not used within DST advection S/R)
868    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
869    
870    checkpoint58j_post
871    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
872      from file (collects calls previously in FORWARD_STEP)
873    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
874    o adjoint store dir. adjusted accordingly
875    o genmake2
876      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
877    
878    checkpoint58i_post
879    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
880      on wind stress (SEAICEstressFactor defaults to 1.)
881    o Total number of Timers is finite (<=40): comment out 2 non-essential one
882      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
883    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
884      on CS-grid: no longer loosing mass.
885    o exf & curvilinear-grid: no longer modify longitude xC & xG.
886    o pkg/ggl90: fix sloppy output and fix a bug
887    o pkg/seaice: added SEAICEuseEVPpickup parameter
888      - Set to false in order to start EVP solver with
889        non-EVP pickup files when using SEAICEuseEVP
890      - fix sign error in diffusion in seaice_calc_rhs
891    
892    checkpoint58h_post
893    * Modifications for bottom topography control
894      o replace hFacC by _hFacC at various places
895      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
896      o add non-self-adjoint cg2d_nsa
897      o update autodiff support routines
898      o re-initialise hfac after ctrl_depth_ini
899      o works for 5x5 box, doesnt work for global_ocean.90x40x15
900    * Adding verification for 5x5 box (4-layer) bottom topography control
901    
902    checkpoint58g_post
903    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
904       used for mean seasonal cycle, mean diurnal cycle); add an example
905       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
906    o pkg/ggl90:
907      - add parameter (minimum surface kinetic energy)
908      - fix bug (avoiding division by zero)
909    o couple pkg/thsice to pkg/seaice:
910      - modify advection in seaice to accomodate new scalar fields to be advected
911      - only muliDimAdection scheme work with seaice/thsice
912      - mapping of thsice-variables to seaice-variables, back and forth
913      - does not break the verification experiments, but does not give the
914        desired results either
915    o pkg/seaice
916      - make (default) second order advection a bit less confusing?
917    
918    checkpoint58f_post
919    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
920      to pkg/seaice):
921      - new routines thsice_map_exf and thsice_get_exf provide the interface
922      - add an additional formal parameter to thsice_solve4temp
923    o pkg/exf:
924      - add new fields wspeed, snowprecip (to be able to couple to thsice)
925      - correct Stefan-Boltzmann constant
926      - new parameter for longwave surface emittance
927      - separate some stuff from exf_bulkformulae into new routines  
928        exf_radiation, exf_wind
929      - add new parameters and constants: longwave emissivity for ocean, ice
930        and snow, evaporation parameters over ice
931      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
932        either wind from stress or stress from wind
933    o pkg/thSIce:
934    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
935    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
936       and THSICE_CALC_THICKN
937    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
938    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
939      to make debugging easier.
940    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
941    o pkg/bulk_force:
942      - clean-up comments and parameters ;
943      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
944    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
945      generate new output for test-experiment: aim.5l_cs.thSI
946    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
947      testreport accordingly
948    
949    checkpoint58e_post
950    o SEAICE_CGRID adjoint done
951    o R_STAR adjoint implemented.
952      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
953      * need to sort out init. of h0facc, etc.
954    o Make pkg/profile fully independent of ecco,cost, etc. stuff
955      to be able to use it in pure forward.
956    
957    checkpoint58d_post
958    o upgrade simple test-experiment to tutorial example:
959     step.1: duplicate the experiment and (step.2) will remove the old copy.
960      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
961      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
962      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
963      tutorial_global_oce_biogeo    <- copy of dic_example
964      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
965      tutorial_plume_on_slope       <- copy of plume_on_slope
966      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
967      tutorial_global_oce_optim     <- empty for now (David ?)
968      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
969     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
970    o correct a sign problem in cost_scat.F
971    o obcs and ptracers: fix boundary conditions for advections schemes
972      with larger stencil
973    o thsice adjoint: start
974    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
975      completeness
976    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
977      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
978    o ptracers adjoint:
979      * avoid extensive recomputatations
980      * fix missing re-init. of gptr (missed by TAF)
981    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
982      me to turn off the excessive output to STDOUT that this package produces
983    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
984      and add those terms in Vector-Invariant formulation.
985    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
986      if the control period (xx_hfluxperiod etc) is 0
987    o in profiles pkg, clean routines and fix details
988    o in ecco pkg, reading ssh data:
989      fix problem in case the model does not start at iter0=0
990    o fix mnc-pickup/restart for ptracers
991    o new package prifiles:
992      code to compute profile-based cost by Gael Forget
993      (modifs in ecco, ctrl, autodiff)
994    o Benign bug fix in initialization (spotted by M. Mazloff) of
995      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
996    
997    checkpoint58c_post
998    o adjoint: finish NLFS adjoint and provide reference output in
999      verification/global_ocean.90x40x15/results_ad_nlfs
1000    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1001      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1002      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1003      with SEAICE_CGRID defined.
1004    o move calendarDumps from "data" to "data.cal" and clean-up the code
1005      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1006    o add useEXF & useCAL flags (for now, set in hard-coded way)
1007    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1008      (were missing in NH mode, and wrong in quasihydrostatic mode).
1009      waiting for Chris updated version of calc_gw to add those CALLs.
1010    o fix bug in quasihydrostatic S/R ;
1011      add a test for this option: global_ocean.90x40x15.qshyd
1012    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1013      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1014    o add on/off flag useOffLine for package OFFLINE
1015    o seaice:
1016      - modify advection so that it works also on the C-grid
1017      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1018        problem in multi-tile runs with C-grid
1019      - add flags for clipping ice velocities and/or masking solver forcing
1020      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1021        C-grid solver
1022      - added a few comments to seaice_diffusion.F
1023      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1024        are now exclusive)
1025      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1026        required re-ordering the code a little:
1027       + make DAIRN global variable (defined in SEAICE)
1028       + move computation of the viscosities eta and zeta into a new separate
1029         routine (because I need to recompute them in seaice_ocean_stress.F)
1030    
1031    checkpoint58b_post
1032    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1033      update output.txt of exp. aim.5l_cs.thSI
1034    o various mnc cleanups and improvements:
1035      + shrink lookup tables by factor of ~4
1036      + better error reporting when running out of lookup space
1037      + able to handle longer path/file names (up to 500 chars)
1038    o adjoint:
1039      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1040      - TBD: "hidden" mom_vecinv recomp. in dynamics
1041    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1042     (allow to differentiate between forcing components using new integer flags:
1043      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1044     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1045    o ecco
1046      - enable trend removal from SSH anomaly obs.
1047    o adjoint
1048      - a fix for PmEpR when #undef EXACT_CONSERV
1049      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1050      - try to fix "hidden" recomp. in forward_step for NLFS
1051        (NLFS seems broken sometimes after I checked it in)
1052    o seaice:
1053     - add c-grid version of the dynamic solver:
1054       + three new routines that are the c-grid substitute lsr, dynsolver
1055         and ostres
1056       + put a few fields that were local to dynsolver into global common
1057         blocks, so that I can move the computation of stresses etc into
1058         seaice_lsr (saves coding but may break the adjoint).
1059     - replace more hardwired parameters by runtime parameters
1060     - add ice masks that mask the rhs of the implicit solvers where there
1061       is no ice (commented out in seaice_dynsolver, because i am not sure
1062       if this works properly), eventually this should replace the clipping
1063       of ice velocities in seaice_dynsolver to +/-40cm/s.
1064    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1065      include it only where its needed
1066    o move balancing of fluxes before the call of external_forcing_surf
1067    o seaice:
1068      - correct units of turning angles (now they are really in degrees)
1069      - move computation of GWATX/Y out of main routine into dynsolver
1070      - initialize GWATX/Y in seaice_init
1071    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1072      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1073    o seaice: add runtime flags for turning angles (default to zero)
1074    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1075      and trend from exf forcing and ctrl control adjustments
1076    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1077      (since checkpoint57x_post)
1078    o change the default rotation period to 86164.s = the Earth rotation
1079    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1080      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1081    o seaice advection: add code for choosing between the default (2nd order
1082      central differences) and multiDim advection schemes provided by
1083      pkg/generic_advdiff
1084    o seaice:
1085      - removed all references to SEAICE_GRID.h fields from
1086        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1087        (cubed-sphere configuration will change a little)
1088      - grid computations in seaice_init are obsolete now.
1089      - cleaned up code a little so that is easier to read (hopefully).
1090      - added new (better?) discretizations of default advection and diffusion
1091        (turn on with SEAICEuseFluxForm)
1092      - replace 1 in 3d global fields by kSurface in growth.F
1093      
1094    checkpoint58a_post
1095    o seaice:
1096      - bug fix in advect.F
1097    o shelfice:
1098      - separate shelfice load anomaly from pload (breaks with time
1099        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1100        Its default is 0., but it may be computed more cleverly from (unknown)
1101        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1102        done offline. A good approximation of the pressure load anomaly is
1103        necessary to avoid large initial adjustment processes underneath
1104        deep-reaching shelfice.
1105      - small fix in ISOMIP shelfice_thermodynamics
1106      - add more sophisticated thermodynamics of Hellmer (1989), this is
1107        now the default
1108      - give a few constants more intuitive names
1109    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1110      if bulk formulae are used in long integration (especially EmPmR). Turn
1111      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1112      if balancePrintMean, the imbalance that is substracted is printed to
1113      STDOUT.
1114    o fix bug (typo) in obcs_apply_eta.F
1115    o add a new package shelfice which enables us to model the circulation
1116      underneath shelf-ice with draughts of hundreds of meters.
1117     - works
1118     - to do: + include improved thermodynamics
1119              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1120                instead of new field kTopC
1121              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1122                instead of new field R_shelfIce and new code in ini_depth.F
1123                and ini_mask_etc.F?
1124              + adjust vertical mixing schemes?
1125    o seaice pkg:
1126     - add a cpp-flag to include a simple formula for a salinity dependent
1127       freezing point of sea water at the surface
1128     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1129       meridional stresses are now different (and hopefully correct)
1130    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1131       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1132       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1133    o pkg/diagnostics: add options and parameters for regional-statistics
1134       diagnostics ; define regions by reading a region-mask from a file
1135       (might add other options later)
1136    o pkg/bulk_force:
1137     - add option and parameters to use AIM surface-flux formulae.
1138     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1139       others forcing fields (defined in PARM05, parameter file "data") are loaded
1140       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1141     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1142     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1143     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1144       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1145     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1146    
1147    checkpoint58
1148    o add "--embed-source" option to genmake2 which, when the supporting
1149      tools can be compiled (as determined by genmake2) will turn on the
1150      embed_files package which then embeds the entire MITgcm source code
1151      (*.[fFhc] + Makefile) used for the build within the executable
1152      - requested by CNH but off by default
1153      - adds a paltry <9MB to the mitgcmuv executable in most cases
1154      - only writes the output when useEMBEDSRC in eedata is true
1155    o clean up 3-dim. relaxation codes:
1156      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1157      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1158      * Thanks to Tom Haine for testing!
1159    
1160    checkpoint57z_post
1161    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1162      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1163    o fix the pickup behavior for obcs in combination with ptracers
1164    o fix a bug in ptracers_external_fields_load
1165    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1166      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1167    o transfered surface NH pressure to eta field (if exactConserv).
1168    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1169         and update lab_sea output.txt file.
1170    o completing 3-dim. relaxation code: additional term
1171         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1172      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1173      * At compile time, in "EXF_OPTIONS.h" set
1174          #define  ALLOW_CLIMTEMP_RELAXATION
1175          #define  ALLOW_CLIMSALT_RELAXATION
1176      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1177          tauThetaClimRelax3Dim = 15552000.0,
1178          tauSaltClimRelax3Dim  = 15552000.0,
1179      * 3 cases:
1180          1) Use a constant-in-time 3-dim. field
1181          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1182          3) Real-time relax. to time-evolving prescribed field
1183    o Adding Laplacian-type smoothness constraint on
1184      initial and boundary (forcing) controls (ic, bc)
1185      * enable at compile-time via
1186        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1187      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1188      * Absolute scale somewhat unclear so far
1189      * no area weighting was included since no other cost term does so far
1190    
1191    checkpoint57y_post
1192    First step for a NLFS adjoint
1193    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1194    o new init. routines for calc_r_star, calc_surf_dr
1195    o still need to deal with ini_masks_etc
1196    o testreport seemed happy
1197    checkpoint57y_pre
1198    
1199    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1200    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1201    o add new offset feature to offline pkg (plus minor cleanup)
1202    o cfc fixes for final year of integration
1203    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1204      be in GCHEM_OPTIONS).
1205    
1206    checkpoint57x_post
1207    o fix testreport Pb in multiple test experiment.
1208    o cleanup our namelist syntax in verification:
1209      - make it more F95 standards compliant (some work still needed)
1210      - allows the vast majority of our tests to work with gfortran
1211    o Non-Hydrostatic:
1212     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1213     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1214    o Allow to apply AB on T,S rather than on AB(gT,gS):
1215     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1216     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1217       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1218     - need a "clever" read_pickup to restart from the other AB formulation
1219    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1220    o remove some unused variables (reduces number of compiler warnings)
1221    o adjoint
1222      * Disable useVariableViscosity for adjoint for time being
1223        (there are a number of extensive recomputations)
1224      * Initialize certain variables needed for adjoint
1225    
1226    checkpoint57w_post
1227    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1228                 fix the singleCpuIO RS version of MDSWRITEFIELD
1229       and add a WARNING if using globalFiles=T with multi-processors.
1230    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1231      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1232    o tracer advection scheme:
1233      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1234       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1235       was not very convenient).
1236      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1237       (further tests needed for the implicit DST & Flux-Limiter schemes).
1238    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1239      and sRef for convenience, handy, when you want to initialize
1240      ptracers in a large domain with a constant non-zero value. Also,
1241      untangle ptracers_init.F a little.
1242    
1243    checkpoint57v_post
1244    o change dome exp. to use variable viscosity in side-drag terms.
1245    o remove all the files from the cfc_offline test since they are now
1246      incorporated into tutorial_cfc_offline which has been producing
1247      identical results for a few days of testing
1248    o add new parameter: sideDragFactor to enable half-slip-side BC
1249      and change side-drag S/R to use viscosity from mom_calc_visc
1250      (can switch back by setting sideDragFactor=0.); affects results at
1251      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1252       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1253    o vorticity & strain are now computed without masking, to account for
1254      no-slip-side BC in variable viscosity calculation ; mask is applied
1255      anyway later on, before computing advection/coriolis terms.
1256    o modify exp4 to test new obcs support for reading from external files
1257      and for passive tracers
1258    o fix behavior of ptracers_monitor when monitor output is written to a
1259      netcdf-file; still not independent of monitor.F (writes in the same
1260      file).
1261    o change default value of tRef (put a uniform, meaningful value for ocean
1262      & atmos) and initialize sRef (was missing, as Martin mentioned).
1263    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1264      to be proportional to enstrophy dissipation length.  Thus,
1265       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1266      This is now consistent with Smagorinsky and with the manual.
1267    
1268    checkpoint57u_post
1269    o OBCS and PTRACERS: add open boundary support for passive tracers
1270      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1271        OB-values from file; this is not different from the way theta and salinity
1272        are treated
1273      - however, Orlanski-radiation conditions are not supported, and the model
1274        will stop if you use pTracers and Orlanski at the same time.
1275      - beefed up the rountine obcs_external_fields_load: now only those open
1276        boundary values are overwritten with values from files for which there
1277        are really files, otherwise the OB-fields remain untouched. This makes
1278        it possible to use different OBs at different ends of the domain (as
1279        with EXF)
1280    o reduce number of exch calls in shap_filt (s2).
1281    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1282      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1283    
1284    checkpoint57t_post
1285    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1286    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1287      same truncation, independent of the face number: affects affects several
1288      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1289    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1290      note that biharmonic viscosity + no-slip was not tested in any experiment.
1291    o fix bug in non-linear free-surf side-drag ; generate new output for
1292      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1293    o make mnc honor the writeBinaryPrec flag for most kinds of output
1294    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1295    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1296      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1297    o add brackets in multi-terms sum to get same truncation, independent of
1298      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1299      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1300    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1301      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1302      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1303      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1304      Suggested values of viscosity parameters found in mom_calc_visc.
1305      Many new viscosity diagnostics available.
1306    
1307    checkpoint57s_post
1308    o Add clearing-house for viscosity calculations, mom_calc_visc and
1309      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1310      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1311      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1312      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1313      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1314      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1315      ViscAhStrain and viscAhTension are now retired.
1316    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1317    o In response to JMC's bug report, genmake2 now ignores any soft-links
1318      that it finds in the *current* directory when searching for files.
1319      Soft-links found in any other source directories will still work as
1320      they did before.
1321    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1322      a C routine to unlimit the stack size
1323    o mnc-ify pkg/aim snapshot vars
1324    o mnc-ify pkg/land as requested by Daniel
1325    o various changes to mnc including:
1326      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1327      - output can now be grouped so that all files within a group
1328          change the ITER portion of their names in lock-step together
1329      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1330          and works with both EXCH1 and EXCH2 (but needs more testing)
1331      - writing works for all verification test cases w/ g77 on Linux
1332    
1333    checkpoint57r_post
1334    o make MNC variable initialization happen earlier
1335    o add diagnostics for (almost) each term of the momentum Eq.
1336    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1337    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1338    o remove MINIMAL_TAVE_OUTPUT option ;
1339      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1340    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1341      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1342    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1343    o add time-dependent SST, SSS control
1344    o cost terms in ecco/ modularized (new cost_generic.F)
1345    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1346    o new infrastructure for seaice model vs. obs misfits in seaice/
1347      * driver from the_main_loop.F is seaice_cost_driver.F
1348      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1349      * gradient check in Exp. 6a of natl_box_adjoint/
1350    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1351      (see README file)
1352    
1353    checkpoint57q_post
1354    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1355    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1356      - bug was reported by Jean-Michel and Ian Fenty
1357    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1358      update exp. cpl_aim+ocn output.
1359    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1360      Needed for high-res. runs with large global files
1361      to be able to limit tapelev size
1362    o Changed some tests for adjoint:
1363      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1364      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1365      * global_ocean.90x40x15/ back to default 3-level checkpointing
1366    o Modifications to enable scripted COMMON to MODULE conversion
1367      * verification/OpenAD/code/ has necessary scripts and description;
1368      * converts, compiles and runs successfully;
1369    
1370    checkpoint57p_post
1371    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1372    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1373      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1374    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1375    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1376      (was already the case for dissipation with mom_vecinv,
1377       and also the case for grad.PhiHyd when staggered-timeStep)
1378      This will allow to put dissipation out-off the AB time-stepping.
1379     Unfortunately, affects truncation error. Update output of exp. that "fails"
1380      (cg2d matching number) and leave the others for later: front_relax(10),
1381      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1382      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1383    
1384    checkpoint57o_post
1385    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1386      (2) its ready to be documented during the 20050801 DocFest
1387    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1388      for ideal_2D_oce and lab_sea on linux_ia32_g77
1389    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1390      in global1x1_tot/code_seaice_adj to access indices 32, 33
1391      (worth another tag)
1392    
1393    checkpoint57n_post
1394    o adding precip control xx_precip 32
1395    o adding swflux control xx_swflux 33
1396    o Replacing 10 forcing penalty cost routines by 1 generic.
1397    o Implementing partitioning in time-mean and variable adjustment
1398      for atmos. state.
1399    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1400  o in natl_box_adjoint:  o in natl_box_adjoint:
1401    * updated: results_bulk/    * updated exp 1 to 10
1402    * not yet updated: results/, results_seaice/      (but does not have time-mean vs. variable split results yet)
1403    o updated global1x1/*_seaice_adj/
1404      to incorporate latest changes
1405    o enable useSingleCpuIO for mdsio vector routines
1406      (applies in particular to tapelev I/O)
1407    o removed inefficient K-loop in all active_file*control*.F
1408    
1409  checkpoint57m_post  checkpoint57m_post
1410  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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