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revision 1.2281 by mlosch, Mon Nov 28 15:53:11 2016 UTC revision 1.2366 by jmc, Fri Dec 15 19:45:22 2017 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/shelfice:
8      - Replace CPP option: SHI_USTAR_WETPOINT with run-time parameter:
9         SHELFICE_oldCalcUStar (default=F <--> #define SHI_USTAR_WETPOINT)
10        but keep only original (old) formula in SHELFICEboundaryLayer code.
11    
12    checkpoint66m (2017/12/12)
13    o add another hook (S/R PDF_FINALIZE) for the Parallel Data Assimilation
14        Framework PDAF (http://pdaf.awi.de/) in the_main_loop.F
15    o pkg/autodiff:
16      - fix pkg/exf AD variable output (mainly ADJprecip), left from pkg/exf modif
17        on Jan 27, 2017. Try also to fix ADJrunoff and TLM output (but less clear).
18    o pkg/obcs:
19      - add simpler setting (single value) of OB indices for the case where
20        indices are uniform over the full section (Bruno Deremble contribution).
21    o pkg/rbcs:
22      - increase size of "relaxMaskFile" to read-in from namelist and save it
23        (+check) into new (renamed) "relaxMaskTrFile" array.
24    o model/src:
25      - option (interViscAr_pCell, interDiffKr_pCell) to account for true vertical
26        distance (including hFac) in vertical viscous flux and diffusive flux ;
27      - add option to increase vertical mixing (for both momentum and tracers)
28        near surface and/or bottom where partial cell is too thin ;
29      - for now, both additions above are within: #ifndef EXCLUDE_PCELL_MIX_CODE ;
30    
31    checkpoint66l (2017/10/24)
32    o pkg/kpp, ggl90 & ebm:
33      - read namelist without IOSTAT=errIO to force to stop if there is an error
34        in the parameter file namelist.
35    o pkg/cheapaml: major changes to relaxation coefficient setting:
36      - rename parameters cheapaml_taurelax & cheapaml_taurelaxocean (in days)
37        to cheap_tauRelax & cheap_tauRelaxOce (now in seconds);
38      - if using cheapMaskFile, set relaxation coeff to: cheapMask/tauRelax
39        (instead of 1/cheapMask over ocean and 1/tauRelax over land);
40      - with cheapMaskFile unset: set relaxation coeff according to land/ocean mask
41        (unchanged) but skip increase near domain edges for periodic domain (in X
42        or Y dir) when cheapamlX/Yperiodic=T ; also fix linear increase (over
43        Cheapaml_mask_width grid points) of coeff towards domain edges (previously
44        was increasing away from edges). Update output of experiment "cheapAML_box".
45    o pkg/cheapaml:
46      - move setting of (fixed in time) relaxation coefficient
47        from cheapaml_init_varia.F to cheapaml_init_fixed.F
48    o pkg/exf:
49      - add specific forcing field for tides to feed model new geopotential anomaly
50        forcing, for now within #ifdef EXF_ALLOW_TIDES.
51      - remove from common block unused params: exf_inscal_sst & exf_inscal_sss.
52    o model:
53      - add new 2-d forcing field for time-dependent geopotential anomaly (e.g.,
54        tidal forcing), in m^2/s^2 ; add run-time param to allow to turn it off.
55    o eesupp/src:
56      - shift standardMessageUnit in eeboot.F and I/O units in mdsfindunit.F
57        for coupling to GEOS AGCM: HACK_FOR_GMAO_CPL option in CPP_EEOPTIONS.h
58    
59    checkpoint66k (2017/09/20)
60    o model/src:
61      - add missing CPP brackets (ALLOW_COST, ALLOW_CTRL in load_fields_driver.F
62        and the_model_main.F)
63    o ctrl:
64      - use zeroRL in place of fc when ALLOW_COST is not compiled (in ctrl_pack.F)
65      - call MDS_READ_FIELD / MDS_WRITE_FIELD instead of deprecated
66        mdsreadfield / mdswritefield (in ctrl_get_gen.F, ctrl_map_ini_gen.F,
67        ctrl_map_ini_genarr.F, and ctrl_map_ini_gentim2d.F )
68    o eesupp:
69      - add CPP option to activate some pieces of code for coupling to GEOS AGCM;
70      - shift commonly used IO unit (in eeboot.F) for coupling to GEOS AGCM.
71    o pkg/bling:
72      - bling_production: Fix typo in calcium carbonate uptake. Also rearranging
73        and cleaning
74    o model/src:
75      - move k loop inside correction_step.F (+ update calling S/R)
76      - collect implicit pressure gradient tendencies in local 2-D array;
77        affect results (at machine truncation level) when using 3-D solver; update
78        output of exp.: exp4 (x1), global_ocean.cs32x15 (x2),hs94.cs-32x32x5.impIGW,
79                        rotating_tank, short_surf_wave,tutorial_deep_convection (x2)
80                        & tutorial_plume_on_slope.
81    
82    checkpoint66j (2017/08/15)
83    o pkg/ptracers:
84      - fix surface forcing under ice-shelf (useShelfIce=T).
85    o pkg/atm_phys:
86      - use hFac weighted average when applying A-grid atm-phys momentum tendency
87        to C-grid dynamics; this ensures wind-stress match mom tendency.
88    o eesupp/src:
89      - change default for opening scratch files to avoid STATUS='SCRATCH'
90      - close scratch files with STATUS='DELETE'
91      - changes affect eeset_parms.F and open_copy_data_file.F and many routines
92        that read namelists (because they close the scratch files)
93      - you can revert to old default by setting USE_FORTRAN_SCRATCH_FILES
94        in CPP_EEOPTIONS.h (tested in ideal_2D_oce/code & lab_sea/code_ad)
95    o pkg/atm_phys:
96      - fix unset arguments in (unused) S/R surface_flux_0d.
97    o eesupp/src:
98      - add argument "procId" to S/R EESET_PARMS to fix  scratchFile1 & 2 setting
99        (case TARGET_BGL or TARGET_CRAYXT) for early call (from eeboot_minimal.F):
100        called with myProcId in eeboot.F and with mpiMyWId in eeboot_minimal.F
101    o pkg/streamice:
102      - remove blank between _EXCH_XY_RL and "()", which my Apple Xcode
103        preprocessor /usr/bin/cpp cannot interpret; 3 instances in total in
104        streamice_driving_stress_fd.F and streamice_advect_2dtracer.F
105    o pkg/diagnostics:
106      - new option to allow to cumulate thickness-factor (hFac) weighted field
107        (if field permitted); implemented by changing sign of "jdiag" pointer
108        (> 0: cumlulate field, < 0: cumulate hFac weighted field).
109        a) restricted to 3-d (Nr levels), level centered diagnostics at U,V or Cell
110           center position (gcode(2)='U','V','M' & gcode(3,5,9:10)='R',' ','MR')
111        b) for now, activated by setting fileFlags 3rd character to 'h'.
112    
113    checkpoint66i (2017/07/18)
114    o pkg/cheapaml:
115      - add parameter "useRelativeWind", default set to False; this change the
116        previous setting which was always using relative wind.
117    o add hooks for the Parallel Data Assimilation Framework PDAF
118        (http://pdaf.awi.de/) in eeboot_minimal.F and the_main_loop.F;
119        to use set CPP-flag USE_PDAF in CPP_EEOPTIONS.h
120    o pkg/exf:
121      - interpolation of vector fields (exf_interp_uv.F): fix bug in calculation
122        of South-Pole mean value.  
123      - interpolation near the poles, case where second additional row is at the
124        pole (or beyond the pole and moved to the pole): change first addition row
125        value to a linear interpolation between pole and 1rst (S.pole)/last (N.pole)
126        row (instead of just a copy of it).
127    o pkg/seaice:
128      - prevent JFNK and KRYLOV solvers from trying to reduce a residual of 0
129      - add the option to compute no-slip du/dy, dv/dx (i.e.
130        the offdiagonal strain rate e12) by a second order approximation
131        on the boundary; works only with JFNK, KRYLOV, or EVP solvers, because
132        it is too messy to implement for the implicit LSR matrix.
133        SEAICE_2ndOrderBC = .FALSE. by default
134    
135    checkpoint66h (2017/06/02)
136    o pkg/seaice:
137      - add new routines to compute stress tensor components and stress tensor
138        divergence to be reused in s/r seaice_lsr and s/r seaice_calc_lhs
139      - change names of diagnostics SIsigI/II (commonly used for invariants)
140        to SIsig1/sig2 (more common for principal components) to avoid confusion
141    o pkf/exf:
142      - add a stop if useRelativeWind with un-updated uwind/vwind (e.g., constant);
143        similarly, stop if rotateStressOnAgrid with constant wind-stress.
144    o pkg/seaice:
145      - remove (comment out) diagnostics SIuwind,SIvwind,SIfu,SIfv (duplicate of
146        EXFuwind,EXFvwind,oceTAUX,oceTAUY) and point them to their equivalent.
147      - add diagnostics of wind-stress over seaice (SItaux,SItauy) and seaice
148        fraction weighted wind stress over ocean+seaice (SIatmTx,SIatmTy).
149    o pkg/diagnostics:
150      - small piece of code to rename (old) diagnostics, when namelist is processed.
151    o model/src:
152      - new run-time param (useMin4hFacEdges) to select method for setting hFacW,S:
153        originally, set as minimum of adjacent hFacC factor ; now (new default)
154        computed from rSurfW,S and rLowW,S by applying same rules as for hFacC.
155        Only matters when useShelfIce=T with particular ice-shelf cavity geometry.
156    o pkg/seaice:
157      - add momemtum advection, off by default, still in test phase
158        most of the momentum advection code is adapted and reused from mom_vecinv
159    o pkg/mom_vecinv:
160      - pass these runtime flags:
161        selectVortScheme, highOrderVorticity, upwindVorticity, useJamartMomAdv
162        as formal parameters to s/r mom_vi_u/v_coriolis, mom_vi_u/v_coriolis_c4,
163        so that these routines can also be used in pkg/seaice.
164    
165    checkpoint66g (2017/04/24)
166    o model/src:
167      - more robust ordering of column thickness integral (=Sum_k(drF*hFac) )
168        to get same expression (regarding machine truncation) in different places
169        in ini_masks_etc.F (e.g., rSurfC,W,S is now exactly zero when it should).
170        Update forward output of experiments: global_ocean.cs32x15 (all 5 except
171        viscA4), isomip (x3), tutorial_global_oce_in_p & tutorial_plume_on_slope.
172    o pkg/shelfice:
173      - ALLOW_SHIFWFLX_CONTROL: move setting of maskSHI from shelfice_update_masks.F
174        to shelfice_init_fixed.F
175      - change S/R SHELFICE_UPDATE_MASKS to SHELFICE_INIT_DEPTHS (still called from
176        ini_masks_etc.F for now) to update ocean upper boundary position according
177        to ice-shelf topography (instead of directly updating hFacC).
178    o model/src:
179      - move call to CTRL_INIT & CTRL_ADMTLM from the middle to the bottom of
180        packages_init_fixed.F to allow other pkgs to set mask and weight fields.
181    
182    checkpoint66f (2017/04/06)
183    o model/src:
184      - add specific run-time param to select level of printed plot-field-maps,
185        set by default to debugLevel. Remove internal param "printDomain".
186    o pkg/seaice:
187      - add flag to add snow mass to seaiceMassC/U/V, the default is
188        SEAICEaddSnowMass=.FALSE., not to change previous results
189    o pkg/bling
190      - Bug fix in bling_production regarding unit conversion for diagnostics
191        being put in the wrong place
192    o model/src:
193      - add back recomputation of rSurfW & S to ensure consistent column thickness
194        (needed for rStar) between Sum_k(hFac*drF) and rSurf-rLow, for now only
195        when using pkg/shelfice; was initially added on 2012/06/01 (ini_masks_etc.F
196        revision 1.51) but was removed accidentally on 2014/02/08 (v1.53).
197    o pkg/autodiff:
198      - clean-up "checkpoint.flow"
199    o pkg/rw (Contribution from Jody Klymak):
200        option to set mds file suffix as function of time in simulation:
201        *) new input parameter "rwSuffixType" (read from PARM03 namelist)
202           to select file suffix format; by default (=0), use iteration number;
203        *) add simple routine to return file suffix according to rwSuffixType;
204        *) in model/src and in most pkgs (except: atm2d, fizhi, regrid & streamice),
205           use new S/R to get file suffix, except for debug output file (diagFreq)
206           and pkgs offline & rbcs input files.
207    o pkg/rw:
208      - uniform processing of "I10" suffix across writing fld routines; used to
209        simplify debug writing of cg2/3d_b/x in solve_for_pressure.F & post_cg3d.F
210        (similar to cg3d.F, cg3d_ex0.F)
211    o pkg/mom_vecinv:
212      - highOrderVorticity in selectVortScheme=2 case: fix c4 coeff in splitted
213        vorticity flux (keep same sum in case vBarXm=vBaXp, uBarYm=uBarYp).
214    o pkg/bling:
215      - Many small changes intended to clean the code.
216        Unnecessary ADJOINT_SAFEs removed ;
217        removed BLING_COST.h BLING_CTRL.h bling_cost.F ;
218        diagnostics added.
219    
220    checkpoint66e (2017/03/14)
221    o pkg/exf:
222      - interpolation with #undef EXF_INTERP_USE_DYNALLOC: move buffer size
223        definition outside EXF_PARAM.h in new header file: EXF_INTERP_SIZE.h;
224        use fixed size buffer (passed to S/R EXF_INTERP & EXF_INTERP_UV) to
225        avoid any dynamic allocation ;
226      - S/R EXF_CHECK: add new check & stop when file-name is defined but not
227        read-in ; add warning when file is read-in but not used within pkg/exf ;
228        + check for buffer-size (if #undef EXF_INTERP_USE_DYNALLOC).
229      - update exf_summary.F (print {FLD}RepCycle).
230    o verification/global_with_exf:
231      - switch on exf interpolation in AD test (just like the forward test)
232    o pkg/mom_vecinv:
233      - add storage directives to avoid recomputations within mom_vecinv.F
234        which were generating seg. fault with gfortran -devel
235    o pkg/ctrl, pkg/smooth:
236      - initialize array halos which were generating seg. fault with
237        gfortran -devel in adjoint mode
238    o pkg/exf:
239      - for each input field, enable to specify a field specific repeat-cycle
240        ({FLD}RepCycle) which defaults to pkg/exf main "repeatPeriod".
241    o verification/lab_sea:
242      - update AD results of primary test and noseaicedyn test after switching
243        to new version of TAF (5.3.13 vs 5.3.2 before); agreement with gradient
244        check stays about the same.
245    o pkg/exf:
246      - fix bug in exf_zenithangle.F for cases select_ZenAlbedo > 0 with useCAL=T.
247      - exf_check: MAX_LAT_INC need only be "loc_nlat-1", not equal to loc_nlat
248    o pkg/bling, USE_EXFCO2 code:
249      - add parameter "apco2RepCycle" (set to pkg/exf "repeatPeriod" by default);
250      - update calls to EXF S/R (use new version: EXF_INIT_FLD & EXF_SET_FLD).
251    o pkg/exf:
252      - rename S/R EXF_INIT to EXF_INIT_VARIA ;
253      - add arguments: fldName (for debug msg) and fldRepeatCycle (set to
254        repeatPeriod) to S/R EXF_SET_UV and to S/R EXF_SET_GEN (renamed EXF_SET_FLD)
255        and update calls in pkg/exf calling S/R (exf_getffields.F & exf_getclim.F) ;
256      - add argument: fldName (for debug msg) to S/R EXF_INIT_GEN (renamed
257        EXF_INIT_FLD) and update calls in exf_init_varia.F
258      - For now, for backward compatibility, keep a simplified version of S/Rs
259        EXF_SET_GEN & EXF_INIT_GEN in file exf_set_gen.F
260      - add and pass new arguments: fldName (for debug msg) and fldRepeatCycle
261        to S/R EXF_GetFFieldRec ; update calls in pkg/obcs/obcs_exf_load.F
262    o tools/genmake2:
263      - replace "bc -l" (only used once) by "expr" (already used).
264    o verification/global_ocean.cs32x15:
265      - turn off pkg/cal (useCAL=F) in secondary FWD exp. "icedyn".
266        Note: exf setting (data.exf) can be compared to other exf secondary exp
267        "seaice" (kept with useCAL=T) which has same time dependent forcing.
268    
269    checkpoint66d (2017/02/13)
270    o pkg/exf:
271      - remove setting of useCAL=T when using pkg/exf (useEXF=T); add warning
272        early on (in packages_boot.F) to stress this change in pkg setting.
273      - In (most) verification exp. that use pkg/exf, add useCAL=.TRUE. to data.pkg
274    o model/src:
275      - move call to ecco_phys to end of time step; this may induce minor
276        cost function changes by shifting time averages by one time step
277        for some variables; this revision resulted in changed adjoint results
278        in MITgcm_contrib/verification_other/global_oce_cs32
279    o pkg/exf:
280      - Change EXF_READ_EVAP to only activate code within #ifdef ALLOW_ATM_TEMP ;
281        this prevents to read evap when ALLOW_ATM_TEMP is undef and other fields,
282        e.g. precip, are not available.
283    o pkg/flt:
284      - flt_init_varia.F: use pickupSuff if specified
285      - add code (within #ifdef DEVEL_FLT_EXCH2) and test case as a first,
286        intermediate, step towards completing pkg/exch2 support within pkg/flt;
287        ifdef DEVEL_FLT_EXCH2 then:
288        - flt_init_fixed.F: comment out stop
289        - flt_exch2.F: conserve ipart, jpart (grid coordinates)
290        - exch2_recv_get_vec.F: transform ipart, jpart (grid coordinates)
291        - flt_mapping.F: attempt to fix longitude diagnostic near date-line
292        - flt_init_varia.F: hack initialization (for testing purposes w. LLC90)
293    o tools/genmake2 & pkg/pkg_depend:
294      - define new type of pkg dependency rule ("=pkg_x"), less strict than
295        the "+" rule, that add the dependent pkg (pkg_x) unless it's disabled
296        (-pkg_x in packages.conf).
297      - change pkg/exf dependency rule from "exf +cal" to "exf =cal";
298      - add "+cal" to dependency list of pkg/ecco (needed to compile).
299      - simplify FWD experiment "offline_exf_seaice" by removing pkg/cal.
300    o utils/matlab:
301      - adding ocean_basin routines for defining basin masks.
302    o pkg/exf:
303      - new S/R EXF_GETFFIELD_START replacing EXF_GETFIELD_START, but with more
304        arguments, allowing to check (and stop) if parameter setting of
305         {FLD}startdate1 & date2 and of {FLD}StartTime are consistent with
306        useCAL= T or F. For now, kept a simplified version of EXF_GETFIELD_START
307        for backward compatibility.
308      - change accordingly calls in exf_init_fixed.F + default {FLD}StartTime in
309        exf_readparms.F ; apply same changes to pkg/icefront (for SGRunOff field).
310    o pkg/bling (USE_EXFCO2 code):
311      - fix missing setting of apco2StartTime according to apco2startdate1 & date2
312        by adding a call to S/R EXF_GETFFIELD_START.
313    o pkg/exf:
314      - allows to compile without pkg/cal (but disabled by current dependency
315        rules, i.e., default "pkg/pkg_depend"). Minimal changes to enable to
316        run with useCAL=F ; this involves setting directly {FLD}StartTime instead
317        of {FLD}startdate1 & date2 ; consistency check not yet coded.
318    o verification/global_ocean.cs32x15:
319      - fix all data.exf for a shift of 1 day in all field startdate1 so that it now
320        corresponds to middle of 1rst month; update outputs (2 fwd + 3 adm + 3 tlm).
321    o pkg/exf:
322      - allow to use EXF_ZENITHANGLE without pkg/cal + simplify (saving some
323        calculations); change FWD experiment global_ocean.cs32x15
324        (#define ALLOW_ZENITHANGLE) to test/check that this code compiles.
325    o pkg/exf:
326      - In preparation for addition to NAMELIST, rename internal (_RL) parameter
327         {FIELD}startdate to {FIELD}StartTime
328        Note: new name also fit better the content, i.e, a start time in second.
329    o eesupp/src:
330      - add 1 argument to S/R EEBOOT & EEBOOT_MINIMAL for interface with ESMF
331    o pkg/exf:
332      - add option ALLOW_READ_TURBFLUXES (and corresponding set of parameters)
333        to allow to read-in Sensible & Latent Heat flux ;
334      - simplify pkg/exf main options:
335        1) move small piece of code (case ALLOW_ATM_TEMP undef) out of
336           exf_bulkformulae.F into exf_wind.F so that exf_bulkformulae.F is
337           compiled only when both ALLOW_ATM_TEMP & ALLOW_BULKFORMULAE are defined;
338        2) make call to EXF_RADIATION and to EXF_WIND independent of CPP option
339           ALLOW_BULKFORMULAE which now only applies to S/R EXF_BULKFORMULAE ;
340        3) improve options documentation in EXF_OPTIONS.h.
341    o pkg/ecco:
342      - cost_gencost_customize.F,ecco.h,ecco_phys.F,ecco_readparms.F, and
343        ecco_summary.F: add passive tracer cost functions to gencost;
344        m_ptracer and m_boxmean_ptracer
345    o pkg/ctrl:
346      - ctrl_map_forcing.F: pass myIter and myTime to ctrl_map_forcing as input
347        parameters; move myIter .EQ. nIter0 inside ctrl_map_forcing; add to list
348        of implemented gentim2d contol parameters: xx_qnet, xx_empmr, xx_qsw,
349        xx_sst, xx_sss, xx_pload, xx_saltflux, xx_fu, xx_fv, xx_fe, xx_fn
350    o model/src:
351      - forward_step.F: pass myIter and myTime to ctrl_map_forcing as input
352        parameters; move myIter .EQ. nIter0 inside ctrl_map_forcing
353    o pkg/exf:
354      - exf_getffields.F: add to list of implemented gentim2d contol parameters:
355        xx_lwflux, xx_swflux, xx_evap, xx_apressure, xx_areamask
356    
357    checkpoint66c (2017/01/19)
358    o verification:
359      - add new option "-src" to testreport to only produce source code (*.f),
360        including taf output src code (if using '-adm'/'-tlm' option).
361    o pkg/exf:
362      - add saltflx :: Net upward salt flux in psu.kg/m^2/s
363    o pkg/diagnostics:
364      - add run-time variable diagMdsDir to specify a subdirectory for
365        diagnostic output when mds is being used and mdsioLocalDir is not.
366    o pkg/mnc:
367      - mnc_utils.F: edit stop message
368    o pkg/autodiff:
369      - autodiff_ini_model_io.F: PRINT_MESSAGE, clean-up comments, add _*_MASTER,
370        add HAVE_SYSTEM bracket around system call to mkdir
371    o pkg/profiles:
372      - profiles_findunit.F, profiles_init_fixed.F, profiles_interp.F,
373        profiles_readparms.F: call ALL_PROC_DIE before 'stop'
374      - profiles_ini_io.F: use PRINT_MESSAGE, clean-up comments, add _*_MASTER,
375        add HAVE_SYSTEM bracket around system call to mkdir
376    o pkg/smooth:
377      - smooth_filtervar2d.F, smooth_filtervar3d.F: call ALL_PROC_DIE before 'stop'
378      - smooth_init2d.F, smooth_init3d.F: move print statements to readparms
379      - smooth_readparms.F: add cleaner print statements from smooth_init?d.F
380    o pkg/exf:
381      - check: count errors and stop cleanly at the end (call to ALL_PROC_DIE);
382        issue error message when climsst_interpMethod.GT.0 and climsst_lon_inc > 500
383        generalize tests on interpMethod, nlat, and lon_inc to all exf variables.
384      - summary: skip detailed field report if not used (empty file-name).
385    o tools/xmakedepend:
386      - In case line editor "ed" is missing, switch to "sed" command to clean-up
387        Makefile from previous dependencies (anything after "# DO NOT DELETE" line).
388    o pkg/exf:
389      - change definition of "hflux" input file to always include Short-Wave;
390        this is now consistent with hflux computation (if using bulk-formulae)
391        and hflux diagnostic & documentation (in EXF_FIELDS.h).
392    
393    checkpoint66b (2016/12/01)
394    o model & momentum pkgs:
395      - implement fully implicit bottom friction combined with implicit surf.
396        pressure, for now, only in hydrostic formulation:
397        + to use: compile with #define ALLOW_SOLVE4_PS_AND_DRAG in CPP_OPTIONS.h
398          and run with selectImplicitDrag=2 ;
399        + currently missing diagnostics of bottom drag and vert. viscosity tendency;
400      - partial implicit time-stepping (bot. friction + vert. visc first, then
401        surf. press) corresponding to selectImplicitDrag=1 should be applicable
402        to NH formulation but not available until we solve for surf. pressure
403        increment (instead of full etaN).
404      - change exp. global_ocean.cs32x15.thsice to test implicit bottom drag
405        with implicit vertical viscosity.
406  o pkg/seaice: add linear remapping scheme (Lipscomb 2001) to ITD model  o pkg/seaice: add linear remapping scheme (Lipscomb 2001) to ITD model
407    - this is a first version that includes many regularisations that may    - this is a first version that includes many regularisations that may
408      not all be necessary, to be sorted out,      not all be necessary, to be sorted out,
409    - turned on by runtime parameter SEAICEuseLinRemapITD (true by default)    - turned on by runtime parameter SEAICEuseLinRemapITD (true by default)
410    - change one verification experiment in seaice_itd to use and test new code    - change one verification experiment in seaice_itd to use and test new code
411    - seaice_growth: catch a case where the argument of log can be zero    - seaice_growth: catch a case where the argument of log can be zero
412      or smaller (important for code stability)      or smaller (important for code stability)
413  o model/src:  o model/src:
414    - modify SOLVE_DIAGONAL_LOWMEMORY version of solve_tridiagonal.F    - modify SOLVE_DIAGONAL_LOWMEMORY version of solve_tridiagonal.F

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