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revision 1.758 by jmc, Wed Dec 20 20:47:30 2006 UTC revision 1.946 by dimitri, Fri Jan 25 11:23:06 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 pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
8      transitions for useExfYearlyFields
9    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
10      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
11      subroutines (which could be generated from a template, because they are
12      almost identical), for now they are included in obcs_prescribe_read.F for
13      simplicity
14    o pkg/exf:
15      - add a little more diagnostic to exf_interp_read (in analogy to
16        mds_read_field, can be turned off with debugLevel < debugLevA=1)
17      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
18        ugly but fast by unrolling short inner loops, inserting a unroll=8
19        directive in routine lagran, and splitting a loop and making do while the
20        outermost loop (the latter requires the intoduction of index arrays)
21    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
22    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
23      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
24    o verification/seaice_obcs: updated for restart test and latest options
25    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
26      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
27      for now this is only available for the C-grid code and also within
28      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
29    
30    checkpoint59m
31    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
32      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
33    o gad_som : fix flux output (& diagnostics) to have same units as other  
34      advection scheme fluxes (was previously multiplied by deltaT).  
35    o added verification/seaice_obcs both to test seaice open boundaries
36      and to provide an example matlab scrpt for generating them
37    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
38    o pkg/salt_plume: clean up salt_plume_frac.F to
39      remove redundancy in PlumeMethod 1 and 4
40    o pkg/kpp: added saltplume diagnostics
41    o pkg/obcs and pkg/seaice:
42      - do not set uice and vice to zero when OB*icefile are unspecified
43      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
44      - moved seaice tracer obcs after call to seaice_growth
45    o pkg/salt_plume: added various options for salt plume depth
46      criterion and for vertical distribution of the salt
47    
48    checkpoint59l
49    o pkg/ptracers: new version of ptracers pickup:
50      read meta file and write only fields which are needed to restart.
51      ( same logic as main pickup file ; also using pickupStrictlyMatch )
52    o pkg/seaice:
53      - add timescale for melting due to warm mixed layer as a means of
54        setting SEAICE_availHeatFrac more conveniently
55      - add a CPP-flag/runtime parameter check for flooding algorithm
56      - reformulated availHeat in seaice_growth.F to be independent of AREA
57    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
58      unit changes
59    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
60    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
61      SX vector computer.
62    o pkg/seaice:
63      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
64        seaice forcing fields can now be read only through pkg/exf
65      - removed some unused halos
66    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
67    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
68      or U/VICE from U/VWIND before computing U/VSTRESS
69    
70    checkpoint59k
71    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
72      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
73    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
74      all experiments pass when compile with un-initialised var. checking option.
75    o added pkg/salt_plume
76    o script to test restart (for now, in MITgcm_contrib/jmc_script)
77    o pkg/seaice: new read/write pickup version.
78      read meta file and write only fields which are needed to restart.
79      ( same logic as main pickup file ; also using pickupStrictlyMatch )
80    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
81    o lab_sea.hb87: modify the domain & update output.hb87.txt :
82      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
83      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
84      process. Fixed here by closing the domain at the Northern boundary.
85    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
86    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
87      a set of consecutive levels in/from a 3-D array.
88    o pkg/ptracers:
89      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
90      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
91    
92    checkpoint59j
93    o in pkgs: dic, obcs, offline, rbcs:
94      standard way to compute coeff. for time interpolation between 2 time reccords
95      which retains full precision (& make results less dependent on compiler).
96      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
97    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
98      packages instead of reading ice cover and wind speed separately
99    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
100     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
101      to allow to compile customized code before the update)
102    o cleaning-up:
103      - fix CPP instruction syntax in pkg/obcs
104      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
105        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
106      - fix some threads issue in IO parts.
107    o pkg/dic:
108      - add tons of "_d 0" (--> much better testreports !)
109       and then update outputs of tutorial_global_oce_biogeo
110    o pkg/mom_fluxform:
111      add a special version of momentum advection intended to conserve momentum
112      next to a bathymetry step or a coastline edge. (default = off = #undef)
113    o new read/write pickup version:
114      - for now, only implemented for main (mdsio) pickup file.
115      - write out only what is needed to restart; merge pickup_nh , pickup_ph
116        and main pickup together.
117      - read meta file; read only what is needed to restart; stop if a field
118        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
119        if it make sense (even if the restart is not perfect).
120      - if no meta file, assume that pickup to read corresponds exactly to
121        a pickup that would currently be written.
122      - read pickup written in the old format (until checkpoint59i) if it
123        recognizes an old meta file (no field-list).
124      - add a meta file in exp. which starts from a pickup: 2 cases:
125        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
126         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
127        b) a meta file describing the content of the associated pickup file
128         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
129    o pkg/mdsio & pkg/rw:
130      - new routine to read a meta file ; new set of routine to read
131        Multiple-fields file (with meta file).
132    o added open boundary conditions capability for seaice
133        HSNOW, HSALT, UICE, and VICE
134    
135    checkpoint59i
136    o adjoint:
137      * fix multiDimAdvection adjoint
138        (partial recomputation problem by TAF for fVerT(:,:,kDown)
139        and comlev1 size definition (maxpass vs. max. number of tracers)
140      * verification/global_ocean.90x45x15 adjoint now tests
141        NLFS and multiDimAdvection using DST3 (=30)
142      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
143    o pkg/kpp: add "_d 0" to real constant (if missing);
144      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
145      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
146    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
147      for internal parameters related to restart process (formerly from PARAMS.h)
148      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
149    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
150      as argument. (only atm2d & obcs write_pickup have not yet been updated)
151    o pkg/monitor:
152      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
153      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
154      - account for deep Atmosphere factor and density factor (anelastic)
155    o added open boundary conditions capability for seaice HEFF and AREA
156    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
157      thermodynamics
158      - requires a little reorganization, which affects the testreport results
159        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
160        so that now the conservative form is tested
161      - add a few comments
162    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
163    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
164    o add new diagnostics to seaice: advective, diffusive fluxes (only for
165      multidim-advection, for scheme 2 they are not filled) and transports,
166      thermodynamic growth rates
167    o change units of EmPmR (inside the code, + within coupling interface)
168      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
169      Affects results @ truncation level (cg2d match) and update output of
170       experiments: lab_sea(6), global_ocean.90x40x15(10),
171      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
172      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
173      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
174      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
175    
176    checkpoint59h
177    o pkg/exf:
178      - improve vectorization by moving if-statement out of loops in
179        exf_mapfields, exf_radiation
180      - exf_bulkformulae.F: introduce 2D fields and vectorize code
181    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
182    o testreport:
183      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
184        monitor & update offline_exf_seaice exp. output.
185      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
186    o pkg/seaice:
187      - bug fix in the evp solver: boundary conditions were affected be
188        masking of zMax/zMin (changes results)
189      - minor bug fix in boundary conditions in seaice_calc_strainrates
190        (changes results for no_slip)
191      - seaice_lsr.F: make interpolation of eta dependent on boundaries
192      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
193      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
194        stress formulation and no-slip boundary conditions
195    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
196      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
197    o pkg/seaice: a first HSALT time stepping equation has been checked in
198    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
199      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
200      without requiring DO-IF statements
201    o pkg/thsice:
202      use continuous power-law function for partition of energy between lateral
203      melting/freezing and thinning/thickening ; old code using step function
204      still available with #undef THSICE_FRACEN_POWERLAW
205      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
206    o testreport: change AD testing : check against results/output_adm.txt
207      using same scripts as for forward test.
208    
209    checkpoint59g
210    o adjoint testing: in preparation for changing testreport:
211      - output format: cost and grad written on separated lines
212      - ad output results in directory "results" (instead of "results_ad")
213    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
214    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
215    o pkg/ecco: allow user defined cost function contributions
216    o testreport:
217      Allow to choose (per experiment) the list of tested output variables
218       and the main variable (used to issue a pass/FAIL ) ;
219      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
220      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
221      Also modify printing of summary:
222       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
223       b) echo the list of tested variables in the individual summary.txt of
224          each experiment.
225    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
226      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
227      (but still depend on the tile decompostion of the domain).
228    o pkg/seaice: change a discretization detail to make the B-grid code
229      "more symmetric". This change is likely to remove all "ridges/leads" that
230      where quasi-aligned with the grid in B-grid solutions. It may also be
231      the solution to the stress coupling issues with the B-grid.
232    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
233      remove .cvsignore from input dir. (since testreport no longer run here).
234    o pkg/thsice:
235     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
236     - fix reshaping of sea-ice just after advection:
237       melt all the ice only if ice-volume is too small.
238     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
239       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
240     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
241    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
242      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
243    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
244      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
245      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
246      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
247      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
248      -> update output.txt
249    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
250     this affects truncation error: -> update output.txt of exp:
251      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
252      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
253    
254    checkpoint59f
255    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
256    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
257      a bounded range (in forward mode)
258    o pkg/ecco, ctrl, autodiff and mom_common:
259     internal parameter controls, completements of implementations
260    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
261    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
262      (not seem any difference in testing results).
263    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
264       at face corners.
265    o pkg/generic_advdiff:
266     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
267      loop range indices for computing vertical advection tendency
268      and do the calculation in the interior only (no overlap) ;
269      for now, only implemented for SOM advection (to save CPU time).
270     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
271    o exch2 adjoint
272      First set of changes:
273      - add exch2 hand-written adjoint templates
274      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
275        This will require cleanup in pkg/autodiff/*.F
276        (changed routines currently kept separate in verif. code/)
277      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
278        that used to hide exch2 or cubed-sphere specific code
279        (commented via 'cph-exch2')
280    o pkg/seaice
281      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
282    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
283       output of global_ocean.cs32x15.thsice .
284    
285    checkpoint59e
286    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
287      for B-grid vector (not yet tested) and C-grid vector (<- only used
288      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
289    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
290      (#ifdef ALLOW_SALT_PLUME)
291    o gather_2d/scatter_2d: removed halo regions
292    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
293      scheme and the corresponding test case (under front_relax dir). For now,
294      only available with Skew-flux form and not yet tested in realistic set-up.
295      adjoint: store directives updated, but gradient checks deteriorated,
296      so maybe GM/Redi adjoint is now broken.
297    o seaice adjoint
298      * add AREA, HEFF, HSNOW as control variable
299        (should not change lab_sea results)
300      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
301    o pkg/seaice:
302      * added computation of saltFlux in seaice_growth;
303        For time being, sea ice salinity is assumed constant
304        contribution of snow flooding to freshening of sea ice is neglected.
305        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
306        defaults to 0.0 in order to maintain backward compatibility.
307        Typical values for SEAICE_salinity are 4 to 10 g/kg.
308      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
309      * added SEAICE_availHeatFrac, which specifies fraction of surface level
310        heat content used to melt or grow ice
311      * commented out cap of HICE: it helps keep ice thinner
312      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
313      * applied OBCS T/S mask to HEFFM sea ice mask
314    
315    checkpoint59d
316    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
317     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
318     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
319    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
320     and change default value of parameter "GM_Small_Number";
321     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
322       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
323       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
324    o pkg/ecco: cost function when applying pkg/smooth to controls
325    o pkg/ctrl: add forcingPrecond run time parameter
326    o pkg/seaice:
327     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
328     - fix bug in metric terms of u-equation in LSR solver (implicit part),
329       changes verification/lab_sea
330     - rearrange implicit part of u-equation in LSR solver to make it easier to
331       read, understand, and debug. This causes changes at the truncation level.
332     - fix (serious) bug in the boundary conditions (sign error in the implicit
333       part) of the LSR solver. Changes all LSR results.
334     - fixed problem with HSNOW initialization to avoid thick snow when AREA
335       is initilized with small values - does not change lab_sea results.
336     - added HsnowFile initialization capability
337    o pkg/smooth: addition to model/src and pkg/ctrl so allow
338     initialization of pkg/smooth and application to control vector
339    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
340    o dependencies: pkg/profiles requires pkg/cal
341    o pkg/profiles:
342     - added option ALLOW_PROFILES_GENERICGRID
343         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
344         that interpolation information (grid points and coefficients) is provided
345         within the netcdf input files.
346         -> sample matlab scripts can be found in MITgcm_contrib/gael
347         that allow you to prepare netcdf input files.
348     - also modified: cleaner include statements, cleaner error print statements,
349       cleaner stops when error, and more tests of the netcdf input files consistency.
350    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
351    o pkg/seaice:
352     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
353       requires a new routine: seaice_diagnostics_fill.F
354     - make sure that seaice does not move if not forced (pressure replacement
355       method, Hibler and Ip, 1995), changes results
356     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
357     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
358       It is turned off by default (=-1.), because it changes the results.
359     - make it possible to read AREA from a file, too.
360    
361    checkpoint59c
362    o add S/R and diagnostics for oceanic mixed-layer depth
363    o move GMRedi call after all vertical mixing schemes (including KPP)
364    o pkg/thsice:
365     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
366      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
367    o pkg/obcs:
368     - bug fix for balance code
369    o pkg/seaice:
370      - allow values of SEAICE_elasticParm > 1
371      - add new parameter SEAICE_evpTauRelax as an alternative
372        to SEAICE_elasticParm
373      - make lsr boundary conditions free slip (by default), changes result
374      - add code for no slip boundary conditions for lsr
375      - set minimum of zeta to zero (and not 4e8) (changes results)
376      - add a cap on AREA after advecting AREA if seaice_growth is not called
377    o change calculation of Visbeck K:
378      - no longer depend on tapering scheme; instead, compute slope (limited
379        by GM_maxSlope). this is equivalent to what was comuted before with
380        clipping or linear tappering.
381      - fix vertical averaging (wrong by 1/2 level)
382      - leave the old version (but will not be maintained) within
383        #ifdef OLD_VISBECK_CALC / #endif
384      - update output of exp. ideal_2D_oce
385    o change error catch in calc_r_star to improve vectorization
386    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
387      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
388    o adjoint:
389      Re-organized adjoint checkpointing according to Matt Mazloff
390      (but with modifs/completions/cleanups)
391      Storing is now bundled into large arrays to optimized I/O
392      (and second step in cleanup of the_main_loop)
393    
394    checkpoint59b
395    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
396      - export/import (between ocean & coupler) fields needed for ocean DIC.
397    o pkg/seaice:
398      - get rid of three more exchanges seaice_calc_viscosities (required
399        different loop boundaries in seaice_lsr and seaice_ocean_stress)
400      - bug fix in seaice_ocean_stress (update of lab_sea required)
401      - reduce loop boundaries to necessary minimum also in seaice_evp
402      - go back to the old way of computing deltaC/Z as the adjoint likes that
403        better
404    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
405      passive tracer to an Age Tracer) + update output.txt
406    o pkg/exf:
407      - implement A-grid / C-grid selection for wind-stress input files.
408      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
409      for now, in exf_bulk_largeyeager04.F only :
410      - change implementation for case where windspeed + 2. components wind-stress
411        are read-in. AND use rhoConstFresh to convert evap.
412    o pkg/seaice:
413      - use correct EXCH_UV for wind-forcing (on A-grid).
414      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
415        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
416    o pkg/exf:
417      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
418      EXF_INTERPOLATION:
419      - merge global_with_exf/code version of exf_interp_read.F
420        to the main code ;
421      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
422        reading the file ; Important: This options needs to be defined to recover
423        previous code.
424        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
425      - no longer loose real*8 precision along the way when using exf_iprec=64.
426    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
427      - change discretisation of evp-solver in order to avoid another exchange
428        (changes lab_sea) and clean up a little
429      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
430        help the adjoint (this also changes the results slightly)
431      - add a few "_d 0" where they had been missing in seaice_evp.F
432      - cleaning up: remove unused seaice_calc_rhs.F
433    o pkg/exf: some cleaning-up:
434      - change various "constants" into runtime parameters
435      - cleaned-up Large&Yeager04 routine which should eventually
436        replace exf_bulkformulae.F (changed names of S/R and CPP)
437        and merged various ALLOW_ATM_WIND options
438     only used with thsice pkg (in thsice_get_exf.F):
439      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
440        which are used when useStabilityFct_overIce=TRUE (= the default)
441      - change default values of ice & snow emissivity and scale downward LW
442        by ice & snow emissivity.
443    o pkg/thsice:
444     fix few little problems, in thsice_calc_thickn.F:
445      - growth vertically (and not laterally) if iceFrac == iceMaskMax
446      - melt only laterally if hIce < hThinIce (as the comments say)
447      and in thsice_extend.F:
448      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
449      - start to form ice as soon as the minimum ice-volume is reachable.
450     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
451      and cpl_aim+ocn
452    o pkg/kpp
453     - move computation of surface related input fields to KPP into a new
454       subroutine kpp_forcing_surf.F
455     - remove wrong (within bi,bj loops) EXCH calls.
456     - little cleaning (add argument myThid in last position, cvs header ...)
457     - for now, fix conservation problem by exchanging KPPviscAz (may not
458       be the best fix)
459    o pkg/seaice
460     - check for inconsistent evp parameter/cpp-flag combination
461     - remove leftover errIO flat for obsolete name list error handling
462    o OpenAD
463     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
464    
465    checkpoint59a
466    o pkg/seaice: some parameter clarifications and a little bit of clean up
467    o pkg/thsice: rename run-time parameters:
468       himin       -> hIceMin
469       himin0      -> hThinIce
470       hihig       -> hThickIce
471       i0          -> i0swFrac
472       transCoef   -> bMeltCoef
473       frac_energy -> fracMelting
474      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
475       with default values (for now) that do not change the results.
476      remove old version of thsice vars advection in pkg/seaice.
477    o in FFIELDS.h:
478      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
479      - make pLoad & sIceLoad always available (but still only used if
480         ATMOSPHERIC_LOADING is #define).
481    o pkg/kpp: replaced _KPP_RL with _RL
482    o bug fixes for vertical diffusivity computations when both KPP and
483        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
484        are no longer updating the vertical diffusivity array
485        (passed as argument) but are (re-) setting those arrays.
486    o pkg/seaice: fix bug in evp solver, while doing that
487      - change (improve?) discretization of stress computations for both
488        cgrid-lsr and evp solver
489      - add a new routine to compute strain rates
490      - the above changes lab_sea results
491      - add no slip conditions for evp solver (off by default), lsr-version
492        may follow
493      - fix exchange for shear at Z-points (does not change lab_sea)
494      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
495        (to force the user to pick a time step since there is not "safe" way
496        of choosing it)
497      - add principal stress diagnostics
498      - rearrange fields for evp a little to avoid having to call a: too many
499        exchanges and b: exchanges for stress trensor components which we do
500        not have.
501      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
502        of evp, complete rewrite for lsr case (latter is does not yet work
503        in all cases)
504    o pkg/kpp: add code to have mixing in shelf ice caverns
505      - add myThid to all kpp routines (long overdue)
506    
507    checkpoint59
508    o pkg/exf:
509      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
510        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
511      - move exf header files from lower_case.h to UPPER_CASE.h ;
512        add missing cvs Header & Name
513      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
514      - add namelist param. selectStressGridPosition, exf_monFreq
515      - retire many _CLIM routines, and remove data.exf_clim
516        + params moved to data.exf
517        + climsst, climsss now handled by exf_set_gen, i.e.
518          climss?period=0 refers to constant field,
519          climss?period=-12 to monthly forcing
520      - split up namelists in data.exf
521    o pkg/seaice:
522      - remove seaice_exch and seaice_exch_uv
523      - remove superfluous exchange of theta
524      - add myThid to seaice_budget_ocean/ice
525      - add new interface for atmospheric wind forcing (C-grid only)
526        + new routine
527        + two new field (taux, tauy for stress over ice)
528        + removed one global field (DAIRN) for C-grid case only
529    o pkg/thsise
530      - 2nd set of modifs for thsice adjoint in conjunction with exf
531    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
532    
533    checkpoint58y_post
534    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
535      vertical diffusivity, similar to that in MOM4; turned on using
536      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
537      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
538    o Added capability for 3D specification of background vertical diffusion
539      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
540      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
541      "data" file that contains the 3D vertical diffusivity coefficients.
542    o ice dynamics (pkg/seaice) with thsice thermodynamics:
543      - add code within pkg thsice to advect & diffuse sea-ice fields
544      similar to (and will replace) what has been added in  seaice_advdiff.F,
545      but: - conserving Mass, Heat & Salt.
546           - better when using non-linear advection scheme (not yet fully tested)
547           - can also be used in atmospheric set-up (for now, only the diffusion).
548    
549    checkpoint58x_post
550    o IO option for global-file compact format:
551      - add options when generating topology (utils/exch2/matlab-topology-generator)
552      - add I/O capability (pkg/mdsio).
553      - adapt utils/matlab/rdmds.m to read this format.
554      for now long-line format not yet supported by pkg/mdsio (& exch2).
555    o shelfice: add a few diagnostics
556    
557    checkpoint58w_post
558    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
559      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
560      (and replace horiVertRatio in NH code).
561      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
562                         and tutorial_plume_on_slope (sensitive to truncation)
563    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
564      directly to drive seaice model (C-grid only)
565    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
566     - reintroduce computation of wind from stress,
567     - compute tau (in exf_bulkformulae.F) from windstress averaged to
568       mass points to avoid tau = 0
569     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
570    o rdmnc.m: make it work with "global" files created with gluemnc
571    o rdmnc.m : some improvements in dealing with singleton dimension
572      (tested on all testreport mnc output files).
573    o genmake2: disable pkg/profiles if netcdf test fails.
574    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
575    o move call to cal_readparms up to make calendar parameters/variable available
576      to all packages
577    
578    checkpoint58v_post
579    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
580      useDynP_inEos_Zc tested.
581    o pkg/exf: changes to properly interpolate/mask/scale initial fields
582    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
583      and portions thereof.  See read_cs.txt for description and examples.
584    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
585      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
586      following the great-circle arc between those 2 points.
587    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
588      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
589    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
590     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
591     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
592     - still needs work (not working with some options ; efficiency to improve)
593       and serious testing.
594     - use this scheme for temperature & salinity in 2 advection test exp.:
595       advect_xy & advect_xz, respectively.
596    
597    checkpoint58u_post
598    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
599    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
600    o testreport: add option "-skipdir" to skip some test.
601    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
602      momentum calculation.
603    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
604    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
605      remove checkpoint.F and the_correction_step.F (no longer used);
606      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
607    o add option (linFSConserveTr) to correct for tracer source/sink due to
608      Linear Free surface
609    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
610    o pkg/thsice: fix reading mnc-pickups
611    
612    checkpoint58t_post
613    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
614    o pkg/mdsio:
615     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
616       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
617       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
618     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
619     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
620       either MDS_READ_FIELD or MDS_WRITE_FIELD )
621     - new S/R (to replace MDSWRITEMETA), which allows to write more
622       informations (variable names, time ...) to meta files.
623     - modify rdmds.m to give back the meta file content.
624    o pkg/diagnostics: change vertical interpolation to be safer, and more
625       flexible (define p-levels to interpolate to in data.diagnostics);
626      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
627       diagnostic pointer.
628    o pkg/seaice: more cleaning up of seaice_growth, added many comments
629    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
630  o fix multi-category seaice:  o fix multi-category seaice:
631   - change cpp flag SEAICE_MULTILEVEL to more meaningful name:   - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
632     SEAICE_MULTICATEGORY     SEAICE_MULTICATEGORY

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