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revision 1.519 by heimbach, Thu Jul 28 14:35:47 2005 UTC revision 1.956 by jmc, Tue Feb 12 23:18:18 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 generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
8  o moved ptracer ctrl index 17 -> 32    - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
9      - modify verification advect_cs test to test SOM-advection on CS-grid.
10    o pkg/ctrl:
11      - Rewrite of ctrl_map_ini_ecco.F,
12        introducing a generic routine (ctrl_map_ini_gen.F).
13      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
14    
15    checkpoint59n
16    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
17      number in dedicate array "hdiag":
18      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
19        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
20      - many small changes (integer format) for large number of diagnostics
21      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
22        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
23    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
24      usingSphericalGrid, this allows to define the rotated grid coordinates
25      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
26      geographical coordinates according to the inverse of the rotation defined
27      by the Euler angles, so that Coriolis parameter and online-interpolation by
28      exf works with the geographical coordinates on XC/YC/XG/YG.
29      Naturally, this feature does not work with all packages, so some
30      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
31      profiles), because there the coordinates are assumed to be regular
32      spherical grid coordinates.
33    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
34      - introduce isopycnal diffusion coefficient control.
35    o tools/adjoint_options:
36      - additional control vector components.
37    o pkg/mnc: have mnc create marginally meaning full coordinate variables
38      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
39    o pkg/mypackage:
40      - add example of read/write pickup for state-var ;
41      - add entry points to the main code for state-vars diags & write-pickup.
42    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
43      transitions for useExfYearlyFields
44      - add new subroutine that determines the file to read from for
45        use*YearlyFields = .TRUE. and .FALSE.
46      - add a verification experiment to global_with_exf that tests
47        useExfYearlyFields with USE_EXF_INTERPOLATION defined
48    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
49      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
50      subroutines (which could be generated from a template, because they are
51      almost identical), for now they are included in obcs_prescribe_read.F for
52      simplicity
53    o pkg/exf:
54      - add a little more diagnostic to exf_interp_read (in analogy to
55        mds_read_field, can be turned off with debugLevel < debugLevA=1)
56      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
57        ugly but fast by unrolling short inner loops, inserting a unroll=8
58        directive in routine lagran, and splitting a loop and making do while the
59        outermost loop (the latter requires the intoduction of index arrays)
60    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
61    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
62      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
63    o verification/seaice_obcs: updated for restart test and latest options
64    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
65      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
66      for now this is only available for the C-grid code and also within
67      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
68    
69    checkpoint59m
70    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
71      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
72    o gad_som : fix flux output (& diagnostics) to have same units as other  
73      advection scheme fluxes (was previously multiplied by deltaT).  
74    o added verification/seaice_obcs both to test seaice open boundaries
75      and to provide an example matlab scrpt for generating them
76    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
77    o pkg/salt_plume: clean up salt_plume_frac.F to
78      remove redundancy in PlumeMethod 1 and 4
79    o pkg/kpp: added saltplume diagnostics
80    o pkg/obcs and pkg/seaice:
81      - do not set uice and vice to zero when OB*icefile are unspecified
82      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
83      - moved seaice tracer obcs after call to seaice_growth
84    o pkg/salt_plume: added various options for salt plume depth
85      criterion and for vertical distribution of the salt
86    
87    checkpoint59l
88    o pkg/ptracers: new version of ptracers pickup:
89      read meta file and write only fields which are needed to restart.
90      ( same logic as main pickup file ; also using pickupStrictlyMatch )
91    o pkg/seaice:
92      - add timescale for melting due to warm mixed layer as a means of
93        setting SEAICE_availHeatFrac more conveniently
94      - add a CPP-flag/runtime parameter check for flooding algorithm
95      - reformulated availHeat in seaice_growth.F to be independent of AREA
96    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
97      unit changes
98    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
99    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
100      SX vector computer.
101    o pkg/seaice:
102      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
103        seaice forcing fields can now be read only through pkg/exf
104      - removed some unused halos
105    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
106    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
107      or U/VICE from U/VWIND before computing U/VSTRESS
108    
109    checkpoint59k
110    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
111      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
112    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
113      all experiments pass when compile with un-initialised var. checking option.
114    o added pkg/salt_plume
115    o script to test restart (for now, in MITgcm_contrib/jmc_script)
116    o pkg/seaice: new read/write pickup version.
117      read meta file and write only fields which are needed to restart.
118      ( same logic as main pickup file ; also using pickupStrictlyMatch )
119    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
120    o lab_sea.hb87: modify the domain & update output.hb87.txt :
121      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
122      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
123      process. Fixed here by closing the domain at the Northern boundary.
124    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
125    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
126      a set of consecutive levels in/from a 3-D array.
127    o pkg/ptracers:
128      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
129      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
130    
131    checkpoint59j
132    o in pkgs: dic, obcs, offline, rbcs:
133      standard way to compute coeff. for time interpolation between 2 time reccords
134      which retains full precision (& make results less dependent on compiler).
135      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
136    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
137      packages instead of reading ice cover and wind speed separately
138    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
139     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
140      to allow to compile customized code before the update)
141    o cleaning-up:
142      - fix CPP instruction syntax in pkg/obcs
143      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
144        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
145      - fix some threads issue in IO parts.
146    o pkg/dic:
147      - add tons of "_d 0" (--> much better testreports !)
148       and then update outputs of tutorial_global_oce_biogeo
149    o pkg/mom_fluxform:
150      add a special version of momentum advection intended to conserve momentum
151      next to a bathymetry step or a coastline edge. (default = off = #undef)
152    o new read/write pickup version:
153      - for now, only implemented for main (mdsio) pickup file.
154      - write out only what is needed to restart; merge pickup_nh , pickup_ph
155        and main pickup together.
156      - read meta file; read only what is needed to restart; stop if a field
157        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
158        if it make sense (even if the restart is not perfect).
159      - if no meta file, assume that pickup to read corresponds exactly to
160        a pickup that would currently be written.
161      - read pickup written in the old format (until checkpoint59i) if it
162        recognizes an old meta file (no field-list).
163      - add a meta file in exp. which starts from a pickup: 2 cases:
164        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
165         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
166        b) a meta file describing the content of the associated pickup file
167         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
168    o pkg/mdsio & pkg/rw:
169      - new routine to read a meta file ; new set of routine to read
170        Multiple-fields file (with meta file).
171    o added open boundary conditions capability for seaice
172        HSNOW, HSALT, UICE, and VICE
173    
174    checkpoint59i
175    o adjoint:
176      * fix multiDimAdvection adjoint
177        (partial recomputation problem by TAF for fVerT(:,:,kDown)
178        and comlev1 size definition (maxpass vs. max. number of tracers)
179      * verification/global_ocean.90x45x15 adjoint now tests
180        NLFS and multiDimAdvection using DST3 (=30)
181      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
182    o pkg/kpp: add "_d 0" to real constant (if missing);
183      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
184      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
185    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
186      for internal parameters related to restart process (formerly from PARAMS.h)
187      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
188    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
189      as argument. (only atm2d & obcs write_pickup have not yet been updated)
190    o pkg/monitor:
191      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
192      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
193      - account for deep Atmosphere factor and density factor (anelastic)
194    o added open boundary conditions capability for seaice HEFF and AREA
195    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
196      thermodynamics
197      - requires a little reorganization, which affects the testreport results
198        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
199        so that now the conservative form is tested
200      - add a few comments
201    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
202    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
203    o add new diagnostics to seaice: advective, diffusive fluxes (only for
204      multidim-advection, for scheme 2 they are not filled) and transports,
205      thermodynamic growth rates
206    o change units of EmPmR (inside the code, + within coupling interface)
207      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
208      Affects results @ truncation level (cg2d match) and update output of
209       experiments: lab_sea(6), global_ocean.90x40x15(10),
210      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
211      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
212      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
213      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
214    
215    checkpoint59h
216    o pkg/exf:
217      - improve vectorization by moving if-statement out of loops in
218        exf_mapfields, exf_radiation
219      - exf_bulkformulae.F: introduce 2D fields and vectorize code
220    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
221    o testreport:
222      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
223        monitor & update offline_exf_seaice exp. output.
224      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
225    o pkg/seaice:
226      - bug fix in the evp solver: boundary conditions were affected be
227        masking of zMax/zMin (changes results)
228      - minor bug fix in boundary conditions in seaice_calc_strainrates
229        (changes results for no_slip)
230      - seaice_lsr.F: make interpolation of eta dependent on boundaries
231      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
232      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
233        stress formulation and no-slip boundary conditions
234    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
235      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
236    o pkg/seaice: a first HSALT time stepping equation has been checked in
237    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
238      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
239      without requiring DO-IF statements
240    o pkg/thsice:
241      use continuous power-law function for partition of energy between lateral
242      melting/freezing and thinning/thickening ; old code using step function
243      still available with #undef THSICE_FRACEN_POWERLAW
244      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
245    o testreport: change AD testing : check against results/output_adm.txt
246      using same scripts as for forward test.
247    
248    checkpoint59g
249    o adjoint testing: in preparation for changing testreport:
250      - output format: cost and grad written on separated lines
251      - ad output results in directory "results" (instead of "results_ad")
252    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
253    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
254    o pkg/ecco: allow user defined cost function contributions
255    o testreport:
256      Allow to choose (per experiment) the list of tested output variables
257       and the main variable (used to issue a pass/FAIL ) ;
258      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
259      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
260      Also modify printing of summary:
261       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
262       b) echo the list of tested variables in the individual summary.txt of
263          each experiment.
264    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
265      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
266      (but still depend on the tile decompostion of the domain).
267    o pkg/seaice: change a discretization detail to make the B-grid code
268      "more symmetric". This change is likely to remove all "ridges/leads" that
269      where quasi-aligned with the grid in B-grid solutions. It may also be
270      the solution to the stress coupling issues with the B-grid.
271    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
272      remove .cvsignore from input dir. (since testreport no longer run here).
273    o pkg/thsice:
274     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
275     - fix reshaping of sea-ice just after advection:
276       melt all the ice only if ice-volume is too small.
277     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
278       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
279     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
280    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
281      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
282    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
283      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
284      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
285      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
286      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
287      -> update output.txt
288    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
289     this affects truncation error: -> update output.txt of exp:
290      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
291      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
292    
293    checkpoint59f
294    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
295    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
296      a bounded range (in forward mode)
297    o pkg/ecco, ctrl, autodiff and mom_common:
298     internal parameter controls, completements of implementations
299    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
300    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
301      (not seem any difference in testing results).
302    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
303       at face corners.
304    o pkg/generic_advdiff:
305     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
306      loop range indices for computing vertical advection tendency
307      and do the calculation in the interior only (no overlap) ;
308      for now, only implemented for SOM advection (to save CPU time).
309     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
310    o exch2 adjoint
311      First set of changes:
312      - add exch2 hand-written adjoint templates
313      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
314        This will require cleanup in pkg/autodiff/*.F
315        (changed routines currently kept separate in verif. code/)
316      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
317        that used to hide exch2 or cubed-sphere specific code
318        (commented via 'cph-exch2')
319    o pkg/seaice
320      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
321    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
322       output of global_ocean.cs32x15.thsice .
323    
324    checkpoint59e
325    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
326      for B-grid vector (not yet tested) and C-grid vector (<- only used
327      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
328    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
329      (#ifdef ALLOW_SALT_PLUME)
330    o gather_2d/scatter_2d: removed halo regions
331    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
332      scheme and the corresponding test case (under front_relax dir). For now,
333      only available with Skew-flux form and not yet tested in realistic set-up.
334      adjoint: store directives updated, but gradient checks deteriorated,
335      so maybe GM/Redi adjoint is now broken.
336    o seaice adjoint
337      * add AREA, HEFF, HSNOW as control variable
338        (should not change lab_sea results)
339      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
340    o pkg/seaice:
341      * added computation of saltFlux in seaice_growth;
342        For time being, sea ice salinity is assumed constant
343        contribution of snow flooding to freshening of sea ice is neglected.
344        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
345        defaults to 0.0 in order to maintain backward compatibility.
346        Typical values for SEAICE_salinity are 4 to 10 g/kg.
347      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
348      * added SEAICE_availHeatFrac, which specifies fraction of surface level
349        heat content used to melt or grow ice
350      * commented out cap of HICE: it helps keep ice thinner
351      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
352      * applied OBCS T/S mask to HEFFM sea ice mask
353    
354    checkpoint59d
355    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
356     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
357     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
358    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
359     and change default value of parameter "GM_Small_Number";
360     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
361       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
362       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
363    o pkg/ecco: cost function when applying pkg/smooth to controls
364    o pkg/ctrl: add forcingPrecond run time parameter
365    o pkg/seaice:
366     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
367     - fix bug in metric terms of u-equation in LSR solver (implicit part),
368       changes verification/lab_sea
369     - rearrange implicit part of u-equation in LSR solver to make it easier to
370       read, understand, and debug. This causes changes at the truncation level.
371     - fix (serious) bug in the boundary conditions (sign error in the implicit
372       part) of the LSR solver. Changes all LSR results.
373     - fixed problem with HSNOW initialization to avoid thick snow when AREA
374       is initilized with small values - does not change lab_sea results.
375     - added HsnowFile initialization capability
376    o pkg/smooth: addition to model/src and pkg/ctrl so allow
377     initialization of pkg/smooth and application to control vector
378    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
379    o dependencies: pkg/profiles requires pkg/cal
380    o pkg/profiles:
381     - added option ALLOW_PROFILES_GENERICGRID
382         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
383         that interpolation information (grid points and coefficients) is provided
384         within the netcdf input files.
385         -> sample matlab scripts can be found in MITgcm_contrib/gael
386         that allow you to prepare netcdf input files.
387     - also modified: cleaner include statements, cleaner error print statements,
388       cleaner stops when error, and more tests of the netcdf input files consistency.
389    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
390    o pkg/seaice:
391     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
392       requires a new routine: seaice_diagnostics_fill.F
393     - make sure that seaice does not move if not forced (pressure replacement
394       method, Hibler and Ip, 1995), changes results
395     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
396     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
397       It is turned off by default (=-1.), because it changes the results.
398     - make it possible to read AREA from a file, too.
399    
400    checkpoint59c
401    o add S/R and diagnostics for oceanic mixed-layer depth
402    o move GMRedi call after all vertical mixing schemes (including KPP)
403    o pkg/thsice:
404     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
405      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
406    o pkg/obcs:
407     - bug fix for balance code
408    o pkg/seaice:
409      - allow values of SEAICE_elasticParm > 1
410      - add new parameter SEAICE_evpTauRelax as an alternative
411        to SEAICE_elasticParm
412      - make lsr boundary conditions free slip (by default), changes result
413      - add code for no slip boundary conditions for lsr
414      - set minimum of zeta to zero (and not 4e8) (changes results)
415      - add a cap on AREA after advecting AREA if seaice_growth is not called
416    o change calculation of Visbeck K:
417      - no longer depend on tapering scheme; instead, compute slope (limited
418        by GM_maxSlope). this is equivalent to what was comuted before with
419        clipping or linear tappering.
420      - fix vertical averaging (wrong by 1/2 level)
421      - leave the old version (but will not be maintained) within
422        #ifdef OLD_VISBECK_CALC / #endif
423      - update output of exp. ideal_2D_oce
424    o change error catch in calc_r_star to improve vectorization
425    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
426      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
427    o adjoint:
428      Re-organized adjoint checkpointing according to Matt Mazloff
429      (but with modifs/completions/cleanups)
430      Storing is now bundled into large arrays to optimized I/O
431      (and second step in cleanup of the_main_loop)
432    
433    checkpoint59b
434    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
435      - export/import (between ocean & coupler) fields needed for ocean DIC.
436    o pkg/seaice:
437      - get rid of three more exchanges seaice_calc_viscosities (required
438        different loop boundaries in seaice_lsr and seaice_ocean_stress)
439      - bug fix in seaice_ocean_stress (update of lab_sea required)
440      - reduce loop boundaries to necessary minimum also in seaice_evp
441      - go back to the old way of computing deltaC/Z as the adjoint likes that
442        better
443    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
444      passive tracer to an Age Tracer) + update output.txt
445    o pkg/exf:
446      - implement A-grid / C-grid selection for wind-stress input files.
447      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
448      for now, in exf_bulk_largeyeager04.F only :
449      - change implementation for case where windspeed + 2. components wind-stress
450        are read-in. AND use rhoConstFresh to convert evap.
451    o pkg/seaice:
452      - use correct EXCH_UV for wind-forcing (on A-grid).
453      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
454        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
455    o pkg/exf:
456      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
457      EXF_INTERPOLATION:
458      - merge global_with_exf/code version of exf_interp_read.F
459        to the main code ;
460      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
461        reading the file ; Important: This options needs to be defined to recover
462        previous code.
463        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
464      - no longer loose real*8 precision along the way when using exf_iprec=64.
465    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
466      - change discretisation of evp-solver in order to avoid another exchange
467        (changes lab_sea) and clean up a little
468      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
469        help the adjoint (this also changes the results slightly)
470      - add a few "_d 0" where they had been missing in seaice_evp.F
471      - cleaning up: remove unused seaice_calc_rhs.F
472    o pkg/exf: some cleaning-up:
473      - change various "constants" into runtime parameters
474      - cleaned-up Large&Yeager04 routine which should eventually
475        replace exf_bulkformulae.F (changed names of S/R and CPP)
476        and merged various ALLOW_ATM_WIND options
477     only used with thsice pkg (in thsice_get_exf.F):
478      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
479        which are used when useStabilityFct_overIce=TRUE (= the default)
480      - change default values of ice & snow emissivity and scale downward LW
481        by ice & snow emissivity.
482    o pkg/thsice:
483     fix few little problems, in thsice_calc_thickn.F:
484      - growth vertically (and not laterally) if iceFrac == iceMaskMax
485      - melt only laterally if hIce < hThinIce (as the comments say)
486      and in thsice_extend.F:
487      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
488      - start to form ice as soon as the minimum ice-volume is reachable.
489     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
490      and cpl_aim+ocn
491    o pkg/kpp
492     - move computation of surface related input fields to KPP into a new
493       subroutine kpp_forcing_surf.F
494     - remove wrong (within bi,bj loops) EXCH calls.
495     - little cleaning (add argument myThid in last position, cvs header ...)
496     - for now, fix conservation problem by exchanging KPPviscAz (may not
497       be the best fix)
498    o pkg/seaice
499     - check for inconsistent evp parameter/cpp-flag combination
500     - remove leftover errIO flat for obsolete name list error handling
501    o OpenAD
502     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
503    
504    checkpoint59a
505    o pkg/seaice: some parameter clarifications and a little bit of clean up
506    o pkg/thsice: rename run-time parameters:
507       himin       -> hIceMin
508       himin0      -> hThinIce
509       hihig       -> hThickIce
510       i0          -> i0swFrac
511       transCoef   -> bMeltCoef
512       frac_energy -> fracMelting
513      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
514       with default values (for now) that do not change the results.
515      remove old version of thsice vars advection in pkg/seaice.
516    o in FFIELDS.h:
517      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
518      - make pLoad & sIceLoad always available (but still only used if
519         ATMOSPHERIC_LOADING is #define).
520    o pkg/kpp: replaced _KPP_RL with _RL
521    o bug fixes for vertical diffusivity computations when both KPP and
522        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
523        are no longer updating the vertical diffusivity array
524        (passed as argument) but are (re-) setting those arrays.
525    o pkg/seaice: fix bug in evp solver, while doing that
526      - change (improve?) discretization of stress computations for both
527        cgrid-lsr and evp solver
528      - add a new routine to compute strain rates
529      - the above changes lab_sea results
530      - add no slip conditions for evp solver (off by default), lsr-version
531        may follow
532      - fix exchange for shear at Z-points (does not change lab_sea)
533      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
534        (to force the user to pick a time step since there is not "safe" way
535        of choosing it)
536      - add principal stress diagnostics
537      - rearrange fields for evp a little to avoid having to call a: too many
538        exchanges and b: exchanges for stress trensor components which we do
539        not have.
540      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
541        of evp, complete rewrite for lsr case (latter is does not yet work
542        in all cases)
543    o pkg/kpp: add code to have mixing in shelf ice caverns
544      - add myThid to all kpp routines (long overdue)
545    
546    checkpoint59
547    o pkg/exf:
548      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
549        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
550      - move exf header files from lower_case.h to UPPER_CASE.h ;
551        add missing cvs Header & Name
552      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
553      - add namelist param. selectStressGridPosition, exf_monFreq
554      - retire many _CLIM routines, and remove data.exf_clim
555        + params moved to data.exf
556        + climsst, climsss now handled by exf_set_gen, i.e.
557          climss?period=0 refers to constant field,
558          climss?period=-12 to monthly forcing
559      - split up namelists in data.exf
560    o pkg/seaice:
561      - remove seaice_exch and seaice_exch_uv
562      - remove superfluous exchange of theta
563      - add myThid to seaice_budget_ocean/ice
564      - add new interface for atmospheric wind forcing (C-grid only)
565        + new routine
566        + two new field (taux, tauy for stress over ice)
567        + removed one global field (DAIRN) for C-grid case only
568    o pkg/thsise
569      - 2nd set of modifs for thsice adjoint in conjunction with exf
570    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
571    
572    checkpoint58y_post
573    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
574      vertical diffusivity, similar to that in MOM4; turned on using
575      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
576      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
577    o Added capability for 3D specification of background vertical diffusion
578      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
579      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
580      "data" file that contains the 3D vertical diffusivity coefficients.
581    o ice dynamics (pkg/seaice) with thsice thermodynamics:
582      - add code within pkg thsice to advect & diffuse sea-ice fields
583      similar to (and will replace) what has been added in  seaice_advdiff.F,
584      but: - conserving Mass, Heat & Salt.
585           - better when using non-linear advection scheme (not yet fully tested)
586           - can also be used in atmospheric set-up (for now, only the diffusion).
587    
588    checkpoint58x_post
589    o IO option for global-file compact format:
590      - add options when generating topology (utils/exch2/matlab-topology-generator)
591      - add I/O capability (pkg/mdsio).
592      - adapt utils/matlab/rdmds.m to read this format.
593      for now long-line format not yet supported by pkg/mdsio (& exch2).
594    o shelfice: add a few diagnostics
595    
596    checkpoint58w_post
597    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
598      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
599      (and replace horiVertRatio in NH code).
600      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
601                         and tutorial_plume_on_slope (sensitive to truncation)
602    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
603      directly to drive seaice model (C-grid only)
604    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
605     - reintroduce computation of wind from stress,
606     - compute tau (in exf_bulkformulae.F) from windstress averaged to
607       mass points to avoid tau = 0
608     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
609    o rdmnc.m: make it work with "global" files created with gluemnc
610    o rdmnc.m : some improvements in dealing with singleton dimension
611      (tested on all testreport mnc output files).
612    o genmake2: disable pkg/profiles if netcdf test fails.
613    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
614    o move call to cal_readparms up to make calendar parameters/variable available
615      to all packages
616    
617    checkpoint58v_post
618    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
619      useDynP_inEos_Zc tested.
620    o pkg/exf: changes to properly interpolate/mask/scale initial fields
621    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
622      and portions thereof.  See read_cs.txt for description and examples.
623    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
624      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
625      following the great-circle arc between those 2 points.
626    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
627      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
628    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
629     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
630     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
631     - still needs work (not working with some options ; efficiency to improve)
632       and serious testing.
633     - use this scheme for temperature & salinity in 2 advection test exp.:
634       advect_xy & advect_xz, respectively.
635    
636    checkpoint58u_post
637    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
638    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
639    o testreport: add option "-skipdir" to skip some test.
640    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
641      momentum calculation.
642    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
643    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
644      remove checkpoint.F and the_correction_step.F (no longer used);
645      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
646    o add option (linFSConserveTr) to correct for tracer source/sink due to
647      Linear Free surface
648    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
649    o pkg/thsice: fix reading mnc-pickups
650    
651    checkpoint58t_post
652    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
653    o pkg/mdsio:
654     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
655       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
656       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
657     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
658     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
659       either MDS_READ_FIELD or MDS_WRITE_FIELD )
660     - new S/R (to replace MDSWRITEMETA), which allows to write more
661       informations (variable names, time ...) to meta files.
662     - modify rdmds.m to give back the meta file content.
663    o pkg/diagnostics: change vertical interpolation to be safer, and more
664       flexible (define p-levels to interpolate to in data.diagnostics);
665      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
666       diagnostic pointer.
667    o pkg/seaice: more cleaning up of seaice_growth, added many comments
668    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
669    o fix multi-category seaice:
670     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
671       SEAICE_MULTICATEGORY
672     - fix short wave heat flux
673    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
674       and allow to use EVP solver. Change forward lab_sea: test both EVP
675       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
676    o Initial check-in of lab_sea adjoint
677      (very similar to natl_box_adjoint/code_seaice)
678      * used C-grid and EVP solver
679      * used KPP, GM/Redi
680      * uses inAdExact=.TRUE.
681      * gradient checks fail for both ADM and TLM
682        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
683        f.d. gradients actually seem more problematic than ADM, TLM gradients;
684        issue is related to forward mismatch between g77 an ifort
685    o pkg/seaice: overhaul of thermodynamics
686     - growth.F and groatb.F are replaced by new routine seaice_growth.F
687     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
688     - move a few global fields out of SEAICE.h into seaice_growth.F and
689       make them 2D (FICE/QNETO/ ...)
690     - remove FO (it is the same as QNETO)
691     - introduce a few local fields to avoid modifying external fields such
692       as atemp, etc.
693    
694    checkpoint58s_post
695    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
696      changed exf_set_gen.F so that
697        genperiod=0 means input file is one time-constant field and
698        genperiod=-12 means input file contains 12 monthly means
699    o CG2D: use pre-computed solver main-diagonal (stored in common block);
700      this affects truncation error ; generate new output file for exp. which
701      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
702        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
703        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
704        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
705        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
706        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
707    o start implementation of deep-atmosphere and anelastic formulation
708    o verification: remove 2nd copy of input files and use script "prepare_run"
709      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
710    o mom_common/vecinv/fluxform: fix a few initialisation isssues
711    o profiles: fix for multithreaded case
712    
713    o diagnostics: rename few diags:
714      s/'PRESSURE'/'RCENTER '/g
715      s/'TICE    '/'oceFreez'/g
716      s/'TAUX    '/'oceTAUX '/g
717      s/'TAUY    '/'oceTAUY '/g
718      s/'SWFLUX  '/'oceQsw  '/g
719      s/DIFx/DFxE/g
720      s/DIFy/DFyE/g
721      and add few ocean-forcing diagnostics:
722      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
723    o modifications to pkg/seaice/growth.F and budget.F, which change results of
724      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
725      as actual snow thickness.  It now refers everywhere to effective snow
726      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
727    
728    checkpoint58r_post
729    o modifications to pkg/seaice/growth.F, which change results of
730      lab_sea experiment: fixes pertain to melting snow over open water, to
731      masking EVAP under sea ice, and to using the correct AREA variable for
732      computations of EVAP, PRECIP, HSNOW, and GHEFF
733    o add ability to read bathy, salt, and theta using MNC (off by def)
734    o add flooding algorithm and advection of HSNOW for pkg/seaice;
735      both are turned off by default and do no change any results
736    o seaice advection with pkg/thsice: a step toward the use of non-linear
737      advection scheme, but #ifdef or commented out for now (requires more EXCH).
738    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
739      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
740      in natl_box (affects results @ truncation level: update output.txt)
741    o multi-threading and IO:
742      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
743      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
744        (needed to work with SingleCpuIO): tested in all verif. exp.
745    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
746      affects the results (but none of the verification test uses this scheme).
747    o Adding some pkg/diagnostics capability to pkg/seaice
748      (will certainly be subject to changes)
749    o ctrl: adding new control variables:
750      lwflux, lwdown, evap, snowprecip, apressure, runoff
751    
752    checkpoint58q_post
753    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
754      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
755      high_res_cube configuration by 4% on Columbia.
756    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
757      add (in global_with_exf/code) a version of EXF_INTERP_READ without
758      dynamical allocation (seems to work in multi-threaded).
759    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
760      single CPU io) so that TAF does not have to see EESUPPORT.h
761    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
762    
763    checkpoint58p_post
764    o obcs: stop if obcs is used with useCDscheme = .true.
765    o shelfice:
766     - fix a sign error so that no slip at shelfice interface works
767     - remove stop for combination non-hydrostatic code and shelfice. That does
768       not mean, that the results are correct, but at least they are numerically
769       stable
770    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
771    o added adjoint exch routined for all exch*3d* routines
772      and updated flow directives
773    
774    checkpoint58o_post
775    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
776      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
777    o change controling S/R for writing pickup file (new S/R do_write_pickup)
778      and clean-up reading/writing of pickup files.
779    o fix local version of read/write pickup (NH part) in rotating_tank/code
780    o simplify EXCH interface:
781     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
782     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
783    o added the regrid package
784    o shelfice:
785     - add a simple boundary layer scheme to reduce noise
786     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
787    
788    checkpoint58n_post
789    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
790       local variable (not in common block).
791    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
792      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
793      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
794        to work with SingleCpuIO.
795    o add "_d 0" to real constant of pkg/cfc subroutines ;
796       update exp. cfc_exemple & tutorial_cfc_offline output files.
797    o multi-threading and IO:
798      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
799        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
800      - barrier before and after reading.
801      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
802      - avoid using MDS_WRITELOCAL for LAND pkg output.
803      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
804        common-block variables ; Allows multi-threading with master-thread IO.
805    o change default MAX_NO_THREADS from 32 to 4 ;
806      and stop cleanly when MAX_NO_THREADS is too small.
807    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
808    
809    checkpoint58m_post
810    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
811       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
812    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
813       keep global_ocean.90x40x15 (for AD testing) with former secondary test
814       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
815    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
816        add MITgcm_tutorials (= code + all the tutorials)
817    o ecco, option to compute cost for total ssh (mean+anom)
818    o consistent with addition of ptracer and ssh in pkg/profiles
819    o profiles: adding ptracer and ssh
820    o testreport: change multi-test output-file name
821      (from output.txt.{name} to output.{name}.txt)
822    o profiles: now ok for mutli-tiles case
823    o seaice: add 4 parameters for different advection schemes for area,
824      (effective) seaice thickness, enthalphy, and snow height. Their default
825      is the standard parameter SEAICEadvScheme
826    o calc_gw:
827     - add cosFacU in zonal viscous flux (harmonic.visc.).
828     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
829       of tutorial_plume_on_slope.
830    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
831    o calc_gw: true flux-form, account for horizontal grid spacing.
832      update rotating_tank results, but not plume_on_slope (affected at
833      truncation level, 11 digits).
834    
835    checkpoint58l_post
836    o calc_gw:
837     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
838     - remove side-drag for now (need to fix it); update plume_on_slope results.
839     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
840    o commit code to make SST/SSS weights spatially variable
841      (based on either variable in-situ or variable initial T/S weights)
842    o pkg/ecco:
843      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
844        now based on horizontally varying weights wthetaLev, wsaltLev
845      * cost_averagesflags now returns year indices in addition to day, month
846      * sflux balance is performed on annual basis
847        (sflxumm, sfluxmm2, bal_sfluxmm)
848      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
849        including separate counting and multipliers
850    o pkg/rbcs
851      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
852    
853    checkpoint58k_post
854    o testreport:
855     - always build in dir. "build" (if not there, mkdir build instead of building
856       & running in input)
857     - run in dir run (if it exists), in build otherwise.
858     - call prepare_run (if input/prepare_run exists)
859     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
860    o pkg/exf modifications to interpolation and rotation routines for more
861       reasonable treatment of North Pole singularity: for tracers North Pole
862       value is set to northernmost zonal-mean value, for zonal velocity it is
863       set to zero, and for meridional velocity it is set to northernmost value.
864    o pkg/exf/exf_check_range.F
865     - add tile index to diagnostics and move stop statement to the very
866       end of the routine.
867    o pkg/diagnostics: (diagnostics_main_init.F)
868      define title of isomorphic variables according to the current config.
869    o pkg/thsice with pkg/seaice dynamics:
870    - fix domain of computation (interior only, required for exf) and do exchanges
871    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
872    o towards a standard way of dealing with multi-threading in MONITOR
873      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
874    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
875       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
876    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
877    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
878    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
879       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
880    o tracer advection:
881     - clean-up and simplify calc_common_factors.F
882     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
883       advection subroutine (but still not used within DST advection S/R)
884    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
885    
886    checkpoint58j_post
887    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
888      from file (collects calls previously in FORWARD_STEP)
889    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
890    o adjoint store dir. adjusted accordingly
891    o genmake2
892      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
893    
894    checkpoint58i_post
895    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
896      on wind stress (SEAICEstressFactor defaults to 1.)
897    o Total number of Timers is finite (<=40): comment out 2 non-essential one
898      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
899    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
900      on CS-grid: no longer loosing mass.
901    o exf & curvilinear-grid: no longer modify longitude xC & xG.
902    o pkg/ggl90: fix sloppy output and fix a bug
903    o pkg/seaice: added SEAICEuseEVPpickup parameter
904      - Set to false in order to start EVP solver with
905        non-EVP pickup files when using SEAICEuseEVP
906      - fix sign error in diffusion in seaice_calc_rhs
907    
908    checkpoint58h_post
909    * Modifications for bottom topography control
910      o replace hFacC by _hFacC at various places
911      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
912      o add non-self-adjoint cg2d_nsa
913      o update autodiff support routines
914      o re-initialise hfac after ctrl_depth_ini
915      o works for 5x5 box, doesnt work for global_ocean.90x40x15
916    * Adding verification for 5x5 box (4-layer) bottom topography control
917    
918    checkpoint58g_post
919    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
920       used for mean seasonal cycle, mean diurnal cycle); add an example
921       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
922    o pkg/ggl90:
923      - add parameter (minimum surface kinetic energy)
924      - fix bug (avoiding division by zero)
925    o couple pkg/thsice to pkg/seaice:
926      - modify advection in seaice to accomodate new scalar fields to be advected
927      - only muliDimAdection scheme work with seaice/thsice
928      - mapping of thsice-variables to seaice-variables, back and forth
929      - does not break the verification experiments, but does not give the
930        desired results either
931    o pkg/seaice
932      - make (default) second order advection a bit less confusing?
933    
934    checkpoint58f_post
935    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
936      to pkg/seaice):
937      - new routines thsice_map_exf and thsice_get_exf provide the interface
938      - add an additional formal parameter to thsice_solve4temp
939    o pkg/exf:
940      - add new fields wspeed, snowprecip (to be able to couple to thsice)
941      - correct Stefan-Boltzmann constant
942      - new parameter for longwave surface emittance
943      - separate some stuff from exf_bulkformulae into new routines  
944        exf_radiation, exf_wind
945      - add new parameters and constants: longwave emissivity for ocean, ice
946        and snow, evaporation parameters over ice
947      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
948        either wind from stress or stress from wind
949    o pkg/thSIce:
950    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
951    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
952       and THSICE_CALC_THICKN
953    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
954    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
955      to make debugging easier.
956    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
957    o pkg/bulk_force:
958      - clean-up comments and parameters ;
959      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
960    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
961      generate new output for test-experiment: aim.5l_cs.thSI
962    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
963      testreport accordingly
964    
965    checkpoint58e_post
966    o SEAICE_CGRID adjoint done
967    o R_STAR adjoint implemented.
968      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
969      * need to sort out init. of h0facc, etc.
970    o Make pkg/profile fully independent of ecco,cost, etc. stuff
971      to be able to use it in pure forward.
972    
973    checkpoint58d_post
974    o upgrade simple test-experiment to tutorial example:
975     step.1: duplicate the experiment and (step.2) will remove the old copy.
976      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
977      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
978      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
979      tutorial_global_oce_biogeo    <- copy of dic_example
980      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
981      tutorial_plume_on_slope       <- copy of plume_on_slope
982      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
983      tutorial_global_oce_optim     <- empty for now (David ?)
984      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
985     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
986    o correct a sign problem in cost_scat.F
987    o obcs and ptracers: fix boundary conditions for advections schemes
988      with larger stencil
989    o thsice adjoint: start
990    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
991      completeness
992    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
993      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
994    o ptracers adjoint:
995      * avoid extensive recomputatations
996      * fix missing re-init. of gptr (missed by TAF)
997    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
998      me to turn off the excessive output to STDOUT that this package produces
999    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1000      and add those terms in Vector-Invariant formulation.
1001    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1002      if the control period (xx_hfluxperiod etc) is 0
1003    o in profiles pkg, clean routines and fix details
1004    o in ecco pkg, reading ssh data:
1005      fix problem in case the model does not start at iter0=0
1006    o fix mnc-pickup/restart for ptracers
1007    o new package prifiles:
1008      code to compute profile-based cost by Gael Forget
1009      (modifs in ecco, ctrl, autodiff)
1010    o Benign bug fix in initialization (spotted by M. Mazloff) of
1011      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1012    
1013    checkpoint58c_post
1014    o adjoint: finish NLFS adjoint and provide reference output in
1015      verification/global_ocean.90x40x15/results_ad_nlfs
1016    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1017      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1018      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1019      with SEAICE_CGRID defined.
1020    o move calendarDumps from "data" to "data.cal" and clean-up the code
1021      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1022    o add useEXF & useCAL flags (for now, set in hard-coded way)
1023    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1024      (were missing in NH mode, and wrong in quasihydrostatic mode).
1025      waiting for Chris updated version of calc_gw to add those CALLs.
1026    o fix bug in quasihydrostatic S/R ;
1027      add a test for this option: global_ocean.90x40x15.qshyd
1028    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1029      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1030    o add on/off flag useOffLine for package OFFLINE
1031    o seaice:
1032      - modify advection so that it works also on the C-grid
1033      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1034        problem in multi-tile runs with C-grid
1035      - add flags for clipping ice velocities and/or masking solver forcing
1036      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1037        C-grid solver
1038      - added a few comments to seaice_diffusion.F
1039      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1040        are now exclusive)
1041      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1042        required re-ordering the code a little:
1043       + make DAIRN global variable (defined in SEAICE)
1044       + move computation of the viscosities eta and zeta into a new separate
1045         routine (because I need to recompute them in seaice_ocean_stress.F)
1046    
1047    checkpoint58b_post
1048    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1049      update output.txt of exp. aim.5l_cs.thSI
1050    o various mnc cleanups and improvements:
1051      + shrink lookup tables by factor of ~4
1052      + better error reporting when running out of lookup space
1053      + able to handle longer path/file names (up to 500 chars)
1054    o adjoint:
1055      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1056      - TBD: "hidden" mom_vecinv recomp. in dynamics
1057    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1058     (allow to differentiate between forcing components using new integer flags:
1059      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1060     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1061    o ecco
1062      - enable trend removal from SSH anomaly obs.
1063    o adjoint
1064      - a fix for PmEpR when #undef EXACT_CONSERV
1065      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1066      - try to fix "hidden" recomp. in forward_step for NLFS
1067        (NLFS seems broken sometimes after I checked it in)
1068    o seaice:
1069     - add c-grid version of the dynamic solver:
1070       + three new routines that are the c-grid substitute lsr, dynsolver
1071         and ostres
1072       + put a few fields that were local to dynsolver into global common
1073         blocks, so that I can move the computation of stresses etc into
1074         seaice_lsr (saves coding but may break the adjoint).
1075     - replace more hardwired parameters by runtime parameters
1076     - add ice masks that mask the rhs of the implicit solvers where there
1077       is no ice (commented out in seaice_dynsolver, because i am not sure
1078       if this works properly), eventually this should replace the clipping
1079       of ice velocities in seaice_dynsolver to +/-40cm/s.
1080    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1081      include it only where its needed
1082    o move balancing of fluxes before the call of external_forcing_surf
1083    o seaice:
1084      - correct units of turning angles (now they are really in degrees)
1085      - move computation of GWATX/Y out of main routine into dynsolver
1086      - initialize GWATX/Y in seaice_init
1087    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1088      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1089    o seaice: add runtime flags for turning angles (default to zero)
1090    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1091      and trend from exf forcing and ctrl control adjustments
1092    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1093      (since checkpoint57x_post)
1094    o change the default rotation period to 86164.s = the Earth rotation
1095    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1096      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1097    o seaice advection: add code for choosing between the default (2nd order
1098      central differences) and multiDim advection schemes provided by
1099      pkg/generic_advdiff
1100    o seaice:
1101      - removed all references to SEAICE_GRID.h fields from
1102        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1103        (cubed-sphere configuration will change a little)
1104      - grid computations in seaice_init are obsolete now.
1105      - cleaned up code a little so that is easier to read (hopefully).
1106      - added new (better?) discretizations of default advection and diffusion
1107        (turn on with SEAICEuseFluxForm)
1108      - replace 1 in 3d global fields by kSurface in growth.F
1109      
1110    checkpoint58a_post
1111    o seaice:
1112      - bug fix in advect.F
1113    o shelfice:
1114      - separate shelfice load anomaly from pload (breaks with time
1115        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1116        Its default is 0., but it may be computed more cleverly from (unknown)
1117        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1118        done offline. A good approximation of the pressure load anomaly is
1119        necessary to avoid large initial adjustment processes underneath
1120        deep-reaching shelfice.
1121      - small fix in ISOMIP shelfice_thermodynamics
1122      - add more sophisticated thermodynamics of Hellmer (1989), this is
1123        now the default
1124      - give a few constants more intuitive names
1125    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1126      if bulk formulae are used in long integration (especially EmPmR). Turn
1127      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1128      if balancePrintMean, the imbalance that is substracted is printed to
1129      STDOUT.
1130    o fix bug (typo) in obcs_apply_eta.F
1131    o add a new package shelfice which enables us to model the circulation
1132      underneath shelf-ice with draughts of hundreds of meters.
1133     - works
1134     - to do: + include improved thermodynamics
1135              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1136                instead of new field kTopC
1137              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1138                instead of new field R_shelfIce and new code in ini_depth.F
1139                and ini_mask_etc.F?
1140              + adjust vertical mixing schemes?
1141    o seaice pkg:
1142     - add a cpp-flag to include a simple formula for a salinity dependent
1143       freezing point of sea water at the surface
1144     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1145       meridional stresses are now different (and hopefully correct)
1146    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1147       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1148       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1149    o pkg/diagnostics: add options and parameters for regional-statistics
1150       diagnostics ; define regions by reading a region-mask from a file
1151       (might add other options later)
1152    o pkg/bulk_force:
1153     - add option and parameters to use AIM surface-flux formulae.
1154     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1155       others forcing fields (defined in PARM05, parameter file "data") are loaded
1156       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1157     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1158     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1159     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1160       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1161     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1162    
1163    checkpoint58
1164    o add "--embed-source" option to genmake2 which, when the supporting
1165      tools can be compiled (as determined by genmake2) will turn on the
1166      embed_files package which then embeds the entire MITgcm source code
1167      (*.[fFhc] + Makefile) used for the build within the executable
1168      - requested by CNH but off by default
1169      - adds a paltry <9MB to the mitgcmuv executable in most cases
1170      - only writes the output when useEMBEDSRC in eedata is true
1171    o clean up 3-dim. relaxation codes:
1172      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1173      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1174      * Thanks to Tom Haine for testing!
1175    
1176    checkpoint57z_post
1177    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1178      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1179    o fix the pickup behavior for obcs in combination with ptracers
1180    o fix a bug in ptracers_external_fields_load
1181    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1182      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1183    o transfered surface NH pressure to eta field (if exactConserv).
1184    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1185         and update lab_sea output.txt file.
1186    o completing 3-dim. relaxation code: additional term
1187         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1188      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1189      * At compile time, in "EXF_OPTIONS.h" set
1190          #define  ALLOW_CLIMTEMP_RELAXATION
1191          #define  ALLOW_CLIMSALT_RELAXATION
1192      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1193          tauThetaClimRelax3Dim = 15552000.0,
1194          tauSaltClimRelax3Dim  = 15552000.0,
1195      * 3 cases:
1196          1) Use a constant-in-time 3-dim. field
1197          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1198          3) Real-time relax. to time-evolving prescribed field
1199    o Adding Laplacian-type smoothness constraint on
1200      initial and boundary (forcing) controls (ic, bc)
1201      * enable at compile-time via
1202        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1203      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1204      * Absolute scale somewhat unclear so far
1205      * no area weighting was included since no other cost term does so far
1206    
1207    checkpoint57y_post
1208    First step for a NLFS adjoint
1209    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1210    o new init. routines for calc_r_star, calc_surf_dr
1211    o still need to deal with ini_masks_etc
1212    o testreport seemed happy
1213    checkpoint57y_pre
1214    
1215    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1216    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1217    o add new offset feature to offline pkg (plus minor cleanup)
1218    o cfc fixes for final year of integration
1219    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1220      be in GCHEM_OPTIONS).
1221    
1222    checkpoint57x_post
1223    o fix testreport Pb in multiple test experiment.
1224    o cleanup our namelist syntax in verification:
1225      - make it more F95 standards compliant (some work still needed)
1226      - allows the vast majority of our tests to work with gfortran
1227    o Non-Hydrostatic:
1228     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1229     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1230    o Allow to apply AB on T,S rather than on AB(gT,gS):
1231     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1232     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1233       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1234     - need a "clever" read_pickup to restart from the other AB formulation
1235    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1236    o remove some unused variables (reduces number of compiler warnings)
1237    o adjoint
1238      * Disable useVariableViscosity for adjoint for time being
1239        (there are a number of extensive recomputations)
1240      * Initialize certain variables needed for adjoint
1241    
1242    checkpoint57w_post
1243    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1244                 fix the singleCpuIO RS version of MDSWRITEFIELD
1245       and add a WARNING if using globalFiles=T with multi-processors.
1246    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1247      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1248    o tracer advection scheme:
1249      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1250       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1251       was not very convenient).
1252      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1253       (further tests needed for the implicit DST & Flux-Limiter schemes).
1254    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1255      and sRef for convenience, handy, when you want to initialize
1256      ptracers in a large domain with a constant non-zero value. Also,
1257      untangle ptracers_init.F a little.
1258    
1259    checkpoint57v_post
1260    o change dome exp. to use variable viscosity in side-drag terms.
1261    o remove all the files from the cfc_offline test since they are now
1262      incorporated into tutorial_cfc_offline which has been producing
1263      identical results for a few days of testing
1264    o add new parameter: sideDragFactor to enable half-slip-side BC
1265      and change side-drag S/R to use viscosity from mom_calc_visc
1266      (can switch back by setting sideDragFactor=0.); affects results at
1267      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1268       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1269    o vorticity & strain are now computed without masking, to account for
1270      no-slip-side BC in variable viscosity calculation ; mask is applied
1271      anyway later on, before computing advection/coriolis terms.
1272    o modify exp4 to test new obcs support for reading from external files
1273      and for passive tracers
1274    o fix behavior of ptracers_monitor when monitor output is written to a
1275      netcdf-file; still not independent of monitor.F (writes in the same
1276      file).
1277    o change default value of tRef (put a uniform, meaningful value for ocean
1278      & atmos) and initialize sRef (was missing, as Martin mentioned).
1279    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1280      to be proportional to enstrophy dissipation length.  Thus,
1281       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1282      This is now consistent with Smagorinsky and with the manual.
1283    
1284    checkpoint57u_post
1285    o OBCS and PTRACERS: add open boundary support for passive tracers
1286      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1287        OB-values from file; this is not different from the way theta and salinity
1288        are treated
1289      - however, Orlanski-radiation conditions are not supported, and the model
1290        will stop if you use pTracers and Orlanski at the same time.
1291      - beefed up the rountine obcs_external_fields_load: now only those open
1292        boundary values are overwritten with values from files for which there
1293        are really files, otherwise the OB-fields remain untouched. This makes
1294        it possible to use different OBs at different ends of the domain (as
1295        with EXF)
1296    o reduce number of exch calls in shap_filt (s2).
1297    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1298      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1299    
1300    checkpoint57t_post
1301    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1302    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1303      same truncation, independent of the face number: affects affects several
1304      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1305    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1306      note that biharmonic viscosity + no-slip was not tested in any experiment.
1307    o fix bug in non-linear free-surf side-drag ; generate new output for
1308      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1309    o make mnc honor the writeBinaryPrec flag for most kinds of output
1310    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1311    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1312      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1313    o add brackets in multi-terms sum to get same truncation, independent of
1314      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1315      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1316    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1317      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1318      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1319      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1320      Suggested values of viscosity parameters found in mom_calc_visc.
1321      Many new viscosity diagnostics available.
1322    
1323    checkpoint57s_post
1324    o Add clearing-house for viscosity calculations, mom_calc_visc and
1325      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1326      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1327      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1328      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1329      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1330      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1331      ViscAhStrain and viscAhTension are now retired.
1332    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1333    o In response to JMC's bug report, genmake2 now ignores any soft-links
1334      that it finds in the *current* directory when searching for files.
1335      Soft-links found in any other source directories will still work as
1336      they did before.
1337    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1338      a C routine to unlimit the stack size
1339    o mnc-ify pkg/aim snapshot vars
1340    o mnc-ify pkg/land as requested by Daniel
1341    o various changes to mnc including:
1342      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1343      - output can now be grouped so that all files within a group
1344          change the ITER portion of their names in lock-step together
1345      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1346          and works with both EXCH1 and EXCH2 (but needs more testing)
1347      - writing works for all verification test cases w/ g77 on Linux
1348    
1349    checkpoint57r_post
1350    o make MNC variable initialization happen earlier
1351    o add diagnostics for (almost) each term of the momentum Eq.
1352    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1353    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1354    o remove MINIMAL_TAVE_OUTPUT option ;
1355      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1356    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1357      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1358    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1359    o add time-dependent SST, SSS control
1360    o cost terms in ecco/ modularized (new cost_generic.F)
1361    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1362    o new infrastructure for seaice model vs. obs misfits in seaice/
1363      * driver from the_main_loop.F is seaice_cost_driver.F
1364      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1365      * gradient check in Exp. 6a of natl_box_adjoint/
1366    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1367      (see README file)
1368    
1369    checkpoint57q_post
1370    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1371    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1372      - bug was reported by Jean-Michel and Ian Fenty
1373    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1374      update exp. cpl_aim+ocn output.
1375    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1376      Needed for high-res. runs with large global files
1377      to be able to limit tapelev size
1378    o Changed some tests for adjoint:
1379      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1380      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1381      * global_ocean.90x40x15/ back to default 3-level checkpointing
1382    o Modifications to enable scripted COMMON to MODULE conversion
1383      * verification/OpenAD/code/ has necessary scripts and description;
1384      * converts, compiles and runs successfully;
1385    
1386    checkpoint57p_post
1387    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1388    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1389      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1390    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1391    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1392      (was already the case for dissipation with mom_vecinv,
1393       and also the case for grad.PhiHyd when staggered-timeStep)
1394      This will allow to put dissipation out-off the AB time-stepping.
1395     Unfortunately, affects truncation error. Update output of exp. that "fails"
1396      (cg2d matching number) and leave the others for later: front_relax(10),
1397      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1398      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1399    
1400    checkpoint57o_post
1401    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1402      (2) its ready to be documented during the 20050801 DocFest
1403    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1404      for ideal_2D_oce and lab_sea on linux_ia32_g77
1405    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1406      in global1x1_tot/code_seaice_adj to access indices 32, 33
1407      (worth another tag)
1408    
1409    checkpoint57n_post
1410    o adding precip control xx_precip 32
1411    o adding swflux control xx_swflux 33
1412    o Replacing 10 forcing penalty cost routines by 1 generic.
1413    o Implementing partitioning in time-mean and variable adjustment
1414      for atmos. state.
1415    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1416  o in natl_box_adjoint:  o in natl_box_adjoint:
1417    * updated: results_bulk/    * updated exp 1 to 10
1418    * not yet updated: results/, results_seaice/      (but does not have time-mean vs. variable split results yet)
1419    o updated global1x1/*_seaice_adj/
1420      to incorporate latest changes
1421    o enable useSingleCpuIO for mdsio vector routines
1422      (applies in particular to tapelev I/O)
1423    o removed inefficient K-loop in all active_file*control*.F
1424    
1425  checkpoint57m_post  checkpoint57m_post
1426  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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