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revision 1.1980 by mlosch, Wed Apr 23 12:42:19 2014 UTC revision 1.2055 by jmc, Sat Aug 30 01:04:15 2014 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/dic:
8      - take out of dic_atmos.F the initialisation part (corresponding to istate=0)
9        and move it to new S/R DIC_INI_ATMOS ; also simplify the dependencies for
10        AD compilers (but still a Pb with multi-threading and Ajoint dependencies).
11    o verification:
12      - new experiment testing OBCS and DIC pkgs, using params & output from
13        tutorial_global_oce_biogeo but limited to a sub-domain around Drake
14        passage: take OBCS from the last year of a 2 yrs simulation and initial
15        conditions from t=1.yr while keeping the same forcing.
16    o model/src:
17      - when allowFreezing=T, only reset below freezing initial Temp to Tfreezing
18        (at any k) if checkIniTemp is not set to FALSE (default checkIniTemp=T).
19    o pkg/diagnostics (Stats-Diags):
20      - re-write S/R DIAGSTATS_CALC (more similar to TARGET_NEC_SX part) to:
21        a) refine region where stats are computed, excluding where arrhFac=0 ;
22        b) fix missing interior mask (use with OBCS) in 3-D fields statistics;
23        c) extend regional stats over the region edges (for U or V pt location).
24    o pkg/gchem:
25      - add a (2nd) call to OBCS_APPLY_PTRACER in gchem_forcing_sep.F (needed since
26        pkg/dic is currently changing/updating ptracers values beyond the OB).
27    o verification (hs94):
28      - convert Held & Suarez external_forcing.F (from hs94.cs, with Sigma-coords
29        bits) to apply_forcing.F and undef USE_OLD_EXTERNAL_FORCING in experiments
30        hs94.cs-32x32x5 and tutorial_held_suarez_cs ; also use the same version of
31        apply_forcing.F in 2D hs94 (fwd, ad & oad) but keep LatLon hs94 unchanged.
32    o pkg/ptracers:
33      - implement Adams-Bashforth on pTracers (instead of on tracer tendency),
34        switched on by setting PTRACERS_doAB_onGpTr=F (default set to doAB_onGtGs)
35      - change exp4 secondary test (input.nlfs) to test AB on T & S & pTracer
36        with AB-2 code (so that it get tested).
37    o model/src:
38      - allow to apply Adams-Bashforth on Temp & Salt (instead of on gT,gS)
39        with AB-2 code (previously only available with AB-3 code).
40        Also move the code (call to ADAMS_BASHFORTH S/R) form thermodynamics.F
41        to temp/salt_integrate.F (since the 2nd part of gt/sNm1 update is done
42        there, by calling CYCLE_AB_TRACER).
43    o pkg/generic_advdiff:
44      - change Tracer argument (drop bi,bj indices) in S/R GAD_CALC_RHS,
45        GAD_C2_ADV_R, GAD_U3_ADV_R, GAD_C4_ADV_R, GAD_DIFF_R, GAD_BIHARM_R
46        + also in GMREDI_X/Y/RTRANSPORT ; and update corresponding calls in
47        S/R temp/salt/ptracers_integrate.F
48    o model/src & pkg/ptracers:
49      - remove common block variables gT,gS (in DYNVARS.h), except when
50         USE_OLD_EXTERNAL_FORCING is defined; update TAF storage accordingly.
51      - remove common block variable gPtr.
52    o model/src & pkgs:
53      - change gTracer (and/or tracer) argument (drop bi,bj indices) in S/R
54         ADAMS_BASHFORTH(2&3), CYCLE_(AB_)TRACER, FREESURF_RESCALE_G,
55         IMPLDIFF, SOLVE_TRIDIAGONAL & _PENTADIAGONAL, GAD_SOM_ADVECT,
56         GAD_ADVECTION, GAD_CALC_RHS, GAD_IMPLICIT_R, TIMEAVE_CUMUL_DIF_1T
57      + change accordingly all calling S/R.
58      - use local temperature/salinity/ptracer tendency array (without bi,bj)
59        in S/R temp/salt/ptracers_integrate.F
60    o pkg/seaice:
61      - move computation of stress contributions to rhsU/V in s/r seaice_lsr
62        to separate s/r seaice_lsr_rhsu/v in order to be able to re-use code
63      - make u/vIceC local variables if SEAICE_CGRID is defined only to be used
64        in seaice_lsr
65      - seaice_lsr.F: make local 4D arrays UXX, VYY, etc 2D
66        in s/r seaice_lsr_calc_coeffs
67    o pkg/mdsio:
68      - in MDS_READ/WRITE_FIELD, stop if file-name (+prefix) is too long
69        (e.g., > MAX_LEN_MBUF -90 ) or, in INI_MODEL_IO, if mdsioLocalDir is
70        too long (e.g., > MAX_LEN_FNAM/2 )
71    
72    checkpoint65b (2014/08/12)
73    o pkg/matrix:
74      - pass, as argument, updated tracer field to S/R MATRIX_STORE_TENDENCY_EXP
75    o model/src:
76      - fix initialisation of geothermalFile; compile geothermal-flux code in
77        natl_box verification experiment.
78    o model/src & pkg/down_slope:
79      - push the k loop inside S/R TIMESTEP_TRACER (now called outside the k loop).
80      - in dwnslp_apply.F, update tracer tendency instead of the future tracer
81        field and call S/R DWNSLP_APPLY before TIMESTEP_TRACER; this affects
82        results at machine truncation level: update output of experiments
83        global_ocean.90x40x15.dwnslp (FWD) and lab_sea.noseaicedyn (AD).
84    o pkg/diagnostics (Stats-Diags):
85      - do not cumulate the full volume when DIAGNOSTICS_FILL is
86        called with bibjFlg < 0 (no increment of the counter for 2D/3D diag);
87        This fix the mean statistics when DIAGNOSTICS_FILL is called multiple
88        times (but Min,Max and StD are still wrong).
89    o model/src:
90      - add geothermal flux forcing: read in ini_forcing.F as time-constant
91        field "geothermalFlux" applied in S/R APPLY_FORCING_T (apply_forcing.F)
92    o model/src:
93      - move CYCLE_TRACER calls from tracers_correction_step.F to temp/salt/ptracer
94        _integrate.F so that, when leaving S/R THERMODYANMICS, theta,salt and pTrac
95        arrays are already updated while adjustments (filters, conv.adjustment) are
96        still applied later, in S/R TRACERS_CORRECTION_STEP.
97    o model/src:
98      - store in common bloc array "rhoInSitu" the virtual potential temperature
99        anomaly that is used to compute geopotential: this make the atmos code
100        more similar to ocean code which already uses rhoInSitu in calc_phi_hyd.F
101    o pkg/seaice/seaice_lsr.F
102      - rename integer variable ilcall to ipass (that's what it is called
103        in the residual diagnostics
104      - change time stepping for NPSEUDOTIMESTEP > 2 (does not change the
105        default) for improved non-linear convergence of the first few steps
106      - adjust a few comments and add new ones to explain some of the store
107        directives
108    o pkg/generic_advdiff (& ptracers):
109      - re-work the code to check for valid advection scheme and for minimum
110        size of overlap (now stored in local common bloc in gad_advscheme.F)
111    o pkg/seaice: another attempt to make the adjoint work for sea ice dynamics
112      - re-initialize more variables in seaice_lsr: u/vIceC, u/vIceNm1
113      - add an auxilliary variable "bet" and fix store directives and keys in
114        seaice_lsr_tridiagu/v, this seems to do the trick (i.e. more or
115        less exact gradients in my tests); but there are still
116        recomputation warning (although gradients are sort of OK), when
117        SEAICE_LSR_VECTORIZE is not defined, so this flag and
118        SEAICE_LSR_VECTORIZE_ZEBRA are recommended for efficiency.
119      - update verification experiments lab_sea.
120      - change some comments in S/R seaice_calc_viscosities
121    o model/src:
122      - if staggerTimeStep=T, always apply exchange to velocity field in
123        do_stagger_fields_exchanges.F instead of in do_fields_blocking_exchanges.F
124        (independent of using multi-dim advection or not); no effect on FWD run
125        but affects AD results (at machine truncation level): update output of
126        experiment 1D_ocean_ice_column (ad: 12 digits), hs94.1x64x5 (ad,oad: 13.d)
127        and isomip (oad: 12.d).
128    o pkg/generic_advdiff:
129      - stop if doAB_onGtGs is set to FALSE but ignored
130      - refine warning related to stability of tracer time-stepping
131        regarding internal wave dynamics.
132      - setting of AdamsBashforth_T,S when doAB_onGtGs=F: remove condition
133        on staggerTimeStep & implicitIntGravWave (will now get a warning
134        if potentially unstable).
135    o pkg/kl10:
136      - add new pkg "kl10" for mixing due to internal wave breaking, from
137        http://www.sciencedirect.com/science/article/pii/S1463500310000144
138        (contribution from Jody Klymak), tested in verification experiment
139        verification/internal_wave/input.kl10/
140    o isomip experiment:
141      - test pkg/shelfice with Non-Lin Free-Surf in one of the FWD set-up
142        (input.htd) and update the output.
143    o cd_code experiments:
144      - use default cd_code options (#undef CD_CODE_NO_AB_MOMENTUM &
145        #undef CD_CODE_NO_AB_CORIOLIS) in experiments: cfc_example (fwd)
146        global_ocean.90x40x15 (ad & oad) and OpenAD (ad & oad) and
147        update the corresponding output.
148    o pkg/seaice:
149      - reduce the number of include files and store directives in
150        S/R seaice_lsr_tridiagu/v
151      - change the order of loops in one case in S/R seaice_lsr_tridiagv
152        (only for SEAICE_VECTORIZE_LSR_ZEBRA defined), which allows me to
153        get rid off one store directive (a TAF bug?)
154      - add one more instance of ifdef SEAICE_VECTORIZE_LSR_ZEBRA in
155        S/R seaice_lsr_tridiagv to change the loop range for consistency
156      - remove ilcall, m from parameter list of S/R seaice_lsr_tridiagu/v
157      - fix a bug that affects the JFNK solver: replace sNx/y by i/jMax in
158        S/R seaice_lsr_tridiagu/v (requires update of
159        offline_exf_seaice/input.dyn_jfnk)
160    
161    checkpoint65a (2014/07/27)
162    o model/src:
163      - Non-Lin Free-Surf in p/z coords: allows hFacW,S to be larger than
164        surrounding hFacC=1 @ edge of a step with different kSurfC on either side
165        (topo in p-coords, ice-shelf in z-coords); update output of experiments
166        tutorial_global_oce_in_p and isomip (both AD and OpenAD output).
167    o model/src:
168      - collect momentum forcing tendency into local 2-D array (passed as argument
169        to apply_forcing S/R); this simplifies mom. Forcing diagnostics and CD_CODE
170        parts in timestep.F (without CD_CODE_NO_AB_MOMENTUM defined = the default);
171        affects results at machine truncation level (e.g., if using OBCS_SPONGE).
172      - collect T & S forcing tendency into local 2-D array (passed as argument to
173        apply_forcing S/R); add 3-D diagnostics for temp & salt forcing tendency.
174        affects results at machine truncation level (e.g., ocean: if using
175        SHORTWAVE_HEATING and atmos:, if using FrictionHeating or (atm_Rq<>0)
176        moist correction due to vertical advection).
177      - update output of experiments: fizhi-cs-32x32x40 (13 digits),
178        global_ocean.cs32x15 (fwd: icedyn, seaice, thsice, all 3 @ 11d; adm & tml:
179        seaice_dynmix & thsice, fwd grd @ 3 & 8), hs94.1x64x5 (ad grd @ 13),
180        obcs_ctrl (ad & fwd grd @ 12 & 7).
181    o pkg/ptracers & diagnostics:
182      - use ptracers (short) name (instead of long one) to make ptracers diagnostics
183        title (to avoid some unexpected truncation); sort out ptracers diags units.
184      - collect ptracer forcing tendency into local 2-D array (passed as argument
185        to apply_forcing S/R); add 3-D diagnostics for ptracers forcing tendency.
186    
187    checkpoint65 (2014/07/18)
188    o pkg/fizhi:
189      - add parenthesis around fizhi tendencies in fizhi_tendency_apply.F: this
190        affects results at machine truncation level. Update output of experiments
191        fizhi-cs-32x32x40 (12 digits for cg2d) & fizhi-cs-aqualev20 (13 digits).
192    o pkg/seaice: more clean up
193      - rename TAF common block tapes to be more consistent and remove
194        unnecessary duplicates
195      - add store directives to remove more recomputations, but use smaller
196        tapes (and adjust keys) when SEAICE_LSR_ADJOINT_ITER is undefined.
197        The idea behind this flag is to reduce the memory footprint when the
198        adjoint of the LSR is not required. As of now, defining the flag
199        SEAICE_LSR_ADJOINT_ITER increases 4 common block tapes for 2D field by
200        a factor of SOLV_MAX_FIXED (=500 by default in SEAICE_SIZE.h).
201        For experiment offline_exf_seaice, this means on a linux box with gfortran
202        nearly a factor of 10 (but keep in mind there is mostly seaice code in
203        this experiment):
204        > size mitgcmuv_ad
205        text    data        bss     dec        hex  
206        5100659 1216  220458952  225560827  d71c8fb
207        5339425 1200 1868783272 1874123897 6fb4dc79 (SEAICE_LSR_ADJOINT_ITER)
208        but only a moderate increase of 36% for global_ocean.cs32x15:
209        text    data        bss     dec        hex
210        6695027 1648 1014578664 1021275339 3cdf6ccb
211        6695203 1648 1382505320 1389202171 52cd8afb (SEAICE_LSR_ADJOINT_ITER)
212      - note: there are still recomputations in global_ocean.cs32x15 and
213        offline_exf_seaice and the gradient agreement changes (gets a
214        little worse) for global_ocean.cs32x15 (-> update output_adm.seaice.txt)
215      - in general, the AD gradients still are wrong
216    o OpenAD
217      - clean up code_oad/ directories somewhat by moving files
218        dontCompile, dontTransform, keepOriginal to OAD_support/
219    o model/src:
220      - using MOM fluxform and Non-Lin Free-Surf with momDissip_In_AB=F
221        (not currently tested): add dissipation terms before NLFS rescaling of
222        tendencies (previously done after).
223    o pkg/diagnostics:
224      - write stats-diags in ascii file with more digits (same as in monitor).
225    o pkg/down_slope:
226      - drop the bi,bj dimension of argument recip_hFac in S/R DWNSLP_APPLY; with
227        NLFS (not tested), use new recip_hFac value in order to conserve tracer.
228    o model/src:
229      - new file "apply_forcing.F" containing all the code previously in
230        external_forcing.F, but with new argument list: pass, as new argument,
231        the current level tendency array to update (instead of a direct update
232        of the common bloc array). Change the corresponding calls.
233      - add CPP option USE_OLD_EXTERNAL_FORCING (default is undef) to use
234        EXTERNAL_FORCING_U,V,T,S subroutines (for backward compatibility).
235    o pkg/seaice/seaice_lsr, a little bit of clean up
236      - rearrange some code blocks, so that now all calculations for
237        setting up the right-hand-sides done within one single block
238        (I find that easier to read and understand)
239      - rearrange freedrift-code to reduce the number of ifdefs
240      - adjust some indentations and comments
241    
242    checkpoint64z (2014/07/10)
243    o model/src and several pkgs:
244      - change argument list of all S/R called from external_forcing.F and
245        called from ptracers_forcing.F (renamed to ptracers_apply_forcing.F)
246        to pass, as argument, the current level tendency array to update
247        (instead of a direct update of the common bloc array).
248      - change also (in the same way) argument list of PTRACERS_APPLY_FORCING;
249      - rename taueddy_external_forcing.f to taueddy_tendency_apply.F
250    o pkg/seaice/seaice_lsr.F
251      - always initialize local arrays in seaice_lsr_tridiagu/v
252      - add more local tapes to seaice_lsr_tridiagu/v
253      - move storing u/vice(:,:,bi,bj) out of seaice_lsr_tridiagu/v, but
254        keep it in bi/bj loop; this seems to be essential
255      - gradients are still wrong but only by 4-7 orders of magnitude
256        instead of 15 orders of magnitude, lab_sea improves a little
257    o pkg/seaice
258      - (pkg/autodiff) remove storing/restoring of seaiceMaskU/V that
259        generates unnecessary code in seaice_lsr_ad
260      - add more store directives in seaice_lsr to avoid unnecessary code
261        in seaice_lsr_ad
262      - exclude some residual computations in seaice_lsr when
263        ALLOW_AUTODIFF_TAMC is defined in order to avoid unnecessary code
264        in seaice_lsr_ad
265      - add more storing, a new tape (model/src/the_main_loop.F) and
266        another key for SEAICE_LSR_VECTORIZE_ZEBRA (the local keys ilockey
267        and klockey should be checked by a specialist)
268      - modify ( define SEAICE_VECTORIZE_LSR and SEAICE_LSR_ADJOINT_ITER )
269        and update lab_sea after previous changes in pkg/seaice below
270    o pkg/autodiff:
271      - introduce useSmoothCorrel2DinAdMode, SEAICEapproxLevInAd, and
272        viscFacInAd : run time parameters allowing for adjoint switches
273        note : logic for useSmoothCorrel2DinAdMode is in ctrl_readparms.F
274    o pkg/ecco:
275      - introduce cost_gencost_boxmean.F that computes a box mean
276        temperature (for use in adjoint sensitivity studies).
277    o model/src/set_defaults.F : initialize viscFacAdj to 1.
278    o pkg/mom_common/mom_calc_visc.F:
279      - ifdef ALLOW_AUTODIFF then include viscFacAdj factor.
280    o pkg/seaice/seaice_summary.F:
281      - statement for SEAICEadjMODE now in autodiff_readparms.F
282    o pkg/seaice:
283      - remove some store directives and add new ones in an effort to get
284        finally rid off the recomputation warnings. This is successful
285        when SEAICE_VECTORIZE_LSR ***and*** SEAICE_LSR_ADJOINT_ITER are
286        defined (i.e. no extensive recomputation warnings left), but there
287        are still too many recomputations on the solver iteration level
288      - define SEAICE_VECTORISZE_LSR in offline_exf_seaice/code_ad/SEAICE_OPTIONS.h
289      - move definition of MPSEUDOTIMESTEPS into TAMC-block in
290        SEAICE_SIZE.h
291      - add a store directive in S/R seaice_calc_viscosities
292    o pkg/seaice (ITD code):
293      - fix definition of Hlimit for multi-threaded case
294      - use double precision arithmetic to compute Hlimit: this affects results;
295        update output of experiment seaice_itd.
296    o replace content of verification/seaice_itd
297      - instead of a 1D column use the configuration of offline_exf_seaice
298        to test the ice thickness distribution code with ridging
299      - this is a first shot at this experiment
300      - change of some defaults of ridging parameters SEAICEhStar (from
301        100 to 25) and SEAICEmuRidging (from 5 to 3) in seaice_readparms.F
302        and lot of new comments.
303    
304    checkpoint64y (2014/06/20)
305    o pkg/seaice/seaice_reg_ridge.F:
306      - modify the regularization of very small volumes of ice; only check
307        total volume HEFF, and do not apply correction to individual ice
308        classes because that leads to funny patterns in the heat and fw-fluxes
309        into the ocean. Adjust seaice_itd/results/output.txt
310      - replace nITD by SEAICE_multDim in loop-ranges
311    o pkg/exf:
312      - add code to process the case field period = -12. with UV interpolation.
313      - move debug print (formerly active when exf_verbose=T) from EXF_getFFieldRec
314        into S/R that calls it (i.e., exf_set_gen.F, exf_set_uv.F & obcs_exf_load.F)
315    o verification/global_with_exf:
316      - switch all fields period to -12. (was previously untested) in input/data.exf
317        (but keep secondary test ".yearly" unchanged); update the reference output.
318    o pkg/cal:
319      - new calendar type "noLeapYear" for 365 days calendar without any leap year.
320    o pkg/exf:
321      - new integer parameter "exf_debugLev" (default set to main model debugLevel)
322        to replace logical switch "exf_verbose"
323      - report in STDOUT when loading a new record (if exf_debugLev >= 3)
324    o pkg/sbo:
325      - update from Katherine Quinn: evaluate mass directly from density and SSH
326        (budget using Finite Volume method) instead of from bottom pressure.
327      - allow testreport to collect few selected SBO output ; tested in exp.
328        global_ocean.90x40x15 (after updating the results, to include SBO output).
329      - fix some multi-threading issues (in output part).
330    o model/src & most packages:
331      - always call {PKG}_READPARMS even if corresponding use{PKG}=F;
332      - in {PKG}_READPARMS, in case use{PKG}=F: add a call to new S/R
333        PACKAGES_UNUSED_MSG to print a weak warning when parameter file
334        "data.{pkg}" exist ; and leave the S/R (return) just after.
335      - more standard LAND pkg interface (land_init_fixed.F, land_check.F).
336        + call LAND_READPARMS from packages_readparms.F
337    o pkg/seaice:
338      - remove code that resets useThSice in S/R seaice_readparms and
339        replace it by a warning in S/R seaice_check
340      - remove parameter MULTDIM, replace with nITD and runtime
341        parameter SEAICE_multDim (still hard-wired to nITD if
342        SEAICE_ITD is defined)
343    
344    checkpoint64x (2014/05/24)
345    o verification/lab_sea:
346      - update adjoint and TLM output following changes to pkg/salt_plume
347      - un-do the update after putting back local recip_Cp in few places.
348    o pkg/salt_plume: modifications by An Nguyen:
349      - add capability to do brine rejection (salt-plume) as function of
350        volume+tracers (instead of only salinity tracer).
351      - conserve volume by exchanging volume from each kLev to above to
352        accommodate in-coming brine volume
353      - store surface and klev exchanged fraction + volume in 4 new 3-d arrays
354      - switch KPP surf buoyancy due to brine forcing to 3-d
355        (3 more 3-d arrays, 2 for SPforcing[T,S], 1 for boplume)
356      - add salt_plume_volfrac, salt_plume_apply, salt_plume_tendency_apply_t
357      - unrelatedly, also add ad-hoc capability to vary salt_plume scheme
358        in East/West Arctic.
359    o pkg/sbo:
360      - incorporate modifications from Katherine Quinn to enable the use of sbo
361        pkg in ECCO-v4 set-up ; remove SBO-TimeAve output ; add monitor-like
362        output for future testreport verification (unfinished).
363    o pkg/atm_phys:
364      - change diagnostics (AtPh_Trf & AtPh_Qrf) of DARGAN_BETTSMILLER S/R:
365        skip the reseting of t_ref & q_ref to initial t & q ; this preserve the
366        output of S/R CAPECALCNEW (Parcel temp & q) for diagnostics.
367    o pkg/seaice
368      seaice_calc_ice_strength.F: modify expression to avoid divisions
369        (affects truncation)
370      seaice_do_ridging.F: clean up the insectarium
371      - fix a bug that was compensated by areaScaling (-> remove areaScaling code)
372      - added SEAICEsnowFracRidge to redistributed snow (2nd bug)
373      - set closing/openingRate to zero where no extra iteration is need (3rd bug)
374      - add some debugging information and error messages (warnings)
375    o model/src: modifications relatd to atmosphere p*:
376      - Switch to more accurate p* coordinate slope term (calc_grad_phi_hyd.F)
377      - With p* or Sigma-P, use constant reference Pot.Temp (thetaConst) instead
378        of vertical profile tRef in geopotential background and anomaly.
379      - Acount for true p* correction in theta <-> T conversion in pkg/aim_v23
380        and pkg/atm_phys.
381      - Update FWD output of experiments: aim.5l_cs (x2), fizhi-cs-32x32x40,
382        fizhi-cs-aqualev20, fizhi-gridalt-hs, tutorial_held_suarez_cs, cpl_aim+ocn.
383    o pkg/seaice: fix a bug in seaice_prepare_ridging.F, forgot a sqrt
384    o pkg/ptracers: compute ptracer source/sink due to linear free surface.
385        not used right now, but can be used in BGC packages to fix conservation.
386    o pkg/dic, pkg/gchem: move tracer_meanarea to gchem, so it can be used by
387        other packages too.
388    o pkg/seaice/seaice_calc_ice_strength.F: replace SEAICE_rhoSnow by
389        SEAICE_rhoIce in the Rothrock (1975)-type strength calculations (bug fix)
390    o model/src:
391      - since we have several heat capacity (even in model/src), define "recip_Cp"
392        as local variable (no longer in common block) to avoid any confusion.
393      - add thetaConst in PARAMS.h (to be used with pStar or sigma-P coords).
394    o pkg/exf:
395      - from Jeff Scott: add option (#define EXF_CALC_ATMRHO) to calculate local
396        air density as function of air Temp, Humidity and atm pressure.
397    
398    checkpoint64w (2014/05/02)
399    o verification:
400      - update output_adm.txt files for experiment global_ocean.cs32x15 (seaice &
401        seaice_dynmix) and lab_sea (primary test & noseaicedyn): moving/changing
402        code from seaice_growth.F & seaice_advdiff.F to new ridging routines
403        seaice_reg_ridge.F seaice_do_ridging.F affects AD gradient
404        (down to 8-7 matching digits for global_ocean and 5-6 for lab_sea).
405    o model/src: for atmosphere in p* coords:
406      - store factor rStarFacC**atm_kappa (= pStarFacK) in common block
407      - implement more accurate p* coordinate slope term (in calc_grad_phi_hyd.F),
408        but not yet activated.
409    o pkg/seaice: fix restart problem for ITD with new ice strength parameterisation:
410      - move computation of opnWtrFrac = 1-AREA to before computing ice strength
411      - this changes the results (but not for any verification experiment, because
412        none tests this), but avoids having an extra field in the restart files
413    o pkg/seaice: remove global variable TICE (not needed)
414      - replace by TICES or local variable where necessary (cost_seaice_test,
415        seaice_diagnostics_state)
416      - move copying TICE to TICES from seaice_check_pickup to seaice_read_pickup
417      - use specific read/write routines for reading and writing individual leves
418        of a multilevel field
419    o pkg/ctrl & model/inc:
420      - move additional anomaly fields of control vars (related to options:
421         ALLOW_KAPGM_CONTROL, ALLOW_KAPREDI_CONTROL and ALLOW_BOTTOMDRAG_CONTROL)
422        from DYNVARS.h into new header file: CTRL_FIELDS.h
423    o pkg/seaice: some small modifications to the ridging code
424      - make fw2ObyRidge a global variable and add the freshwater flux to
425        seaice_growth
426      - pass actual thickness from seaice_prepare_ridging, so that it is
427        computed only in one place and compute it in the same way as in
428        seaice_growth
429      - initialise more fields in seaice_do_ridging that where cause floating
430        point exceptions over land
431  o pkg/seaice: preparations for ridging code and first real ridging code  o pkg/seaice: preparations for ridging code and first real ridging code
432    - move most of "PART 1" of S/R seaice_growth into a new and separate    - move most of "PART 1" of S/R seaice_growth into a new and separate
433      S/R seaice_reg_ridge that will both regularize the state variable after      S/R seaice_reg_ridge that will both regularize the state variable after
434      advection call the actual ridging routine;      advection call the actual ridging routine;
435    - requires to make 5 fields global fields: d_HEFFbyNEG,d_HSNWbyNEG,    - requires to make 5 fields global fields: d_HEFFbyNEG,d_HSNWbyNEG,
436      d_AREAbyRLX,d_HEFFbyRLX,saltFluxAdjust;      d_AREAbyRLX,d_HEFFbyRLX,saltFluxAdjust;
437    - remove ridging code from seaice_advdiff    - remove ridging code from seaice_advdiff
438    - clean up remaining part 1 of seaice_growth in an attempt to make it    - clean up remaining part 1 of seaice_growth in an attempt to make it
439      more readable (this is probably subjective)      more readable (this is probably subjective)
440    - call seaice_itd_redist once in the initialisation phase to have the initial    - call seaice_itd_redist once in the initialisation phase to have the initial
441      conditions in the correct category      conditions in the correct category
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