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revision 1.1508 by jmc, Thu Sep 29 17:31:02 2011 UTC revision 1.1605 by dimitri, Sat Mar 3 16:04:38 2012 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/seaice :
8      - final version of turbulent flux params, as agreed at MIT ice meet:
9           SEAICE_mcPheePiston (default is ~ 0.000875)
10           SEAICE_mcPheeTaper (default is 0.)
11           SEAICE_frazilFrac (defualt is 1.)
12           SEAICE_mcPheeStepFunc (default is false)
13      - changes results at trunction error level
14      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
15    o added pkg/frazil - see frazil_description.tex for details
16    o pkg/shelfice/shelfice_thermodynamics.F
17      - fix exponents for velocity dependent exchange coefficients: change
18        from 2/3(=0) to 0.66666666666666667
19      - move computation of velocity dependent exchange coefficients into
20        separate loop, so that it applies to both thermodynamics
21      - move some divisions by constants out of loops
22    
23    checkpoint63j (2012/02/16)
24    o pkg/seaice:
25      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
26      - SItracer:  added run time params, and allow coupling to ocn salinity.
27    o pkg/seaice: remove (almost) all divisions by constants within loops
28      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
29      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
30      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
31      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
32    o pkg/seaice :
33      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
34        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
35      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
36      - add permanent SItflux diag that corresponds to TFLUX but includes
37        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
38      - allow activation/testing of a fix for suspected missing term in
39        ocn-ice heat budget (to be confirmed). To test this, you want to
40        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
41        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
42      - no change in results, fwd or ad.
43    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
44      - switch to variable freezing point.
45           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
46      - bug fix : the sublimation term that was missing is now activated.
47           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
48      - bug fix : flooding sign term for SIsal0.NE.0.
49           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
50    o pkg/seaice:
51      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
52        is now the default, and the old default constant freezing point is recovered
53        with SEAICE_tempFrz0    = -1.96,
54             SEAICE_dTempFrz_dS = 0.,
55      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
56      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
57      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
58        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
59      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
60        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
61      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
62        seaice_growth r149 for legacy branch (no results change).
63      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
64        from I. Fenty).
65      - results did not change except for global_ocean.cs32x15, mostly due to the
66        switch to variable freezing point (see above item for detail).
67    o pkg/thsice:
68      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
69        seawater freezing in thsice_calc_thickn (not used).
70    o pkg/seaice: turbulent flux term specification via run time params.
71      - replace CPP switches with run time switches to facilitate testing
72      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
73                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
74      - added runtime parameter : SEAICEturbFluxFormula
75      - move Mcphee constants to SEAICE_PARAMS.h
76      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
77                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
78                 remove seaice_summary call (moved to seaice_init_fixed)
79      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
80        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
81      - seaice_summary.F : add missing report of read turbulent flux term set up
82                           and SITRACER.
83      - seaice_check.F : check range; inform and stop if retired CPPs are used
84                         (incl. SEAICE_AGE).
85      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
86             CPP switch, same computation as before for the different options.
87      - change results at the truncation level.
88    o pkg/seaice:
89      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
90        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
91        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
92      - update verification/*/input*/data.seaice:
93        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
94        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
95        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
96        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
97    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
98      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
99        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
100        difference in results only due to machine truncation.
101      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
102        MaykutPolySatVap; keep MIN_LWDOWN.
103      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
104      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
105        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
106    o pkg/salt_plume:
107      - isolate saltPlumeFlux array exch into a specific S/R called from
108        do_oceanic_phys.F
109      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
110    o verification:
111      - move untested set-up to MITgcm_contrib/verification_other.
112    o pkg/seaice:
113      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
114    o pkg/seaice:
115      - seaice_solve4temp.F (keeping results unchanged):
116        * add 2 future run-time params to select which saturation vapor pressure
117          formula is used and how post-iteration fluxes are set.
118          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
119        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
120          the linearized expression to stay consistent with tsurf finding.
121      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
122        can be < 0.
123    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
124      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
125        conductive heat flux F_c , and add it explicitly when updating tsurf as
126        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
127        so that now F_ia has a consistent meaning through the entire routine.
128        This causes differences at truncation level: update output of fwd exp.
129        global_ocean.cs32x15.seaice.
130    o pkg/seaice:
131      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
132        of arrays, sign/direction of fluxes; no effect on results.
133      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
134        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
135        note: this should have been done before changing celsius2K default.
136      - to keep results unchanged, add back old value of celsius2K in verification
137        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
138      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
139        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
140        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
141        freezing temp is consistent with value in seaice_growth.F ; this causes
142        differences at machine truncation level: update lab_sea AD output (3/4).
143    o pkg/seaice:
144      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
145        and climsst/sss even when using seaice (to prevent calculation that might
146        use SST on land); does not affect any verification exp.
147      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
148        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
149    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
150      over land (non-legacy code)
151    o vectorize salt_plume package:
152      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
153      - this code computes plumebk everywhere (also over land), thus requires
154        code to avoid divisions by zero and catch the case of kLev=Nr.
155      - efficiency of salt_plume_frac is still sub-optimal
156    o tools (genmake2):
157      - fix makefile NAME specification (option: -makefile NAME) by adding
158        "-f $MAKEFILE" in few places where it was missing including makedepend
159        command (contribution from Paul).
160    
161    checkpoint63i (2012/01/24)
162    o model/src:
163      - add factorized versions of some EOS code to find_rho.F,
164        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
165    o model/src:
166      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
167      - change default celsius2K from 273.16 to 273.15
168      - to keep results unchanged, add back old value of celsius2K in verification
169        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
170         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
171    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
172      to make TAF generate vectorizable code
173    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
174       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
175       have flags that do this more efficiently.
176    o pkg/diagnostics/diagstats_calc.F
177      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
178    o pkg/obcs (with exch2):
179      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
180        and remove code (in obcs_readparms.F) which was based on EXCH of indices
181        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
182    o pkg/exf and seaice exp:
183      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
184        so that switching off area & heff advection flags does not affect results.
185      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
186      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
187        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
188        results of verification experiments: 1D_ocean_ice_column(fwd),
189        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
190        and offline_exf_seaice (all 4).
191    o pkg/seaice:
192      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
193        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
194      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
195        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
196        not multi-dim advection;
197      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
198        SHORTWAVE_HEATING #undef.
199    o optim: make Makefile more robust (?)
200    o pkg/obcs:
201      * fix treatment of obcs_read_pickup for TAF
202    o pkg/shelfice:
203      * add missing initialisation of num_shifwflx
204      * new adjoint verification exp. for isomip
205      * change Prandtl and Schmidt numbers from generic formulations
206        (in terms of model diffus. and visc.) to separate runtime
207        parameters, with Holland and Jenkins (1999) default values.
208    o pkg/exf (interpolation):
209      - extended input field (2 rows) near the N & S poles:
210        * fill in with the symetric value (when even Nb of data in longitude)
211        * add average value at the poles only for scalar quantities ; for vector
212          component interpolation, skip the averaging and keep duplicated values,
213          unless the 2 components have same location (uvInterp=T) in which case
214          interpolate the 2 components together using S/R EXF_INTERP_UV.
215      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
216        together: this allows to account properly for local orientation when
217        averaging at N & S pole.
218      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
219        exf-interpolation near N & S poles. Undef by default.
220      - add debug check/print on 1rst iter if debugLevel >=2.
221    o pkg/exf:
222      - change masking flags definition (no longer "parameter"), put them in
223        common block and set them in S/R EXF_INIT_FIXED.
224      - change recognized masking flag from s,u,v to c,w,s since the mask
225        to use (maskC,W,S) depends on position on model grid and has little to
226        do with scalar/vector difference; fix masking if using P-coordinates.
227      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
228        and update results of exp. global_with_exf (x2).
229      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
230    o pkg/obcs
231      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
232    o pkg/exf (interpolation):
233      - assume periodicity in X only if input field cover full longitude range.
234      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
235        and should vectorise).
236      - fix input lat of the 2 added row (in case we provide N.pole data).
237    
238    checkpoint63h (2011/12/30)
239    o pkg/seaice:
240      - change declaration of UVM from _RL to _RS in order to get B-grid
241        uIce,vIce monitor when _RS = real*4
242    o pkg/offline:
243      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
244      - compute vertical velocity if not read from file (switch on exactConserv
245        & staggerTimeStep);
246      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
247    o verification:
248      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
249        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
250        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
251      - update output of exp. global_ocean.cs32x15.viscA4 after changing
252        grid-file angles (used here for coriolis-3d);
253      - remove (or gzip) few files not needed to run fizhi-cs experiments.
254    o pkg/exf (vector interpolation):
255      - rotate vector component toward local grid-axis orientation using grid-angles
256        (stored in GRID.h) instead of locally computed rotation angle; keep old code
257        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
258    o pkg/seaice:
259      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
260        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
261    o pkg/PKG_OPTIONS.h files:
262      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
263        outside of the #ifdef ALLOW_THISPKG / #endif block.
264      - update verification/*/code/PKG_OPTIONS.h files.
265    o add a verification experiment (offline_exf_seaice/input.seaice) that test
266      the B-grid LSOR solver
267    o pkg/seaice: sort out emissivity and long wave radiation step 2:
268      - add emissivity for snow and ice as new run-time parameters
269        (unfortunately) that default to the corresponding exf values; this
270        changes results in most verification experiments so that for backward
271        compatibility these parameter have to be set explicitly to inconsistent
272        values (ugly);
273      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
274        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
275        until we agree how to handle this bug properly
276    o pkg/exf (interpolation):
277      - add a set of run-time param ({inputfield}_interpMethod), one for
278        each interpolated input field, to select the interpolation method
279        with a value of zero switching off the interpolation;
280      - print interpolation parameters to standard output;
281      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
282        (to use instead runoff_interpMethod=0 in data.exf).
283      - simplify default setting of interpolation parameters (for all fields,
284        set position to match model grid cell-center position, leading to trivial
285        interpolation in case of regular Lat-Lon grid) and fix for the case of
286        non-uniform delY.
287    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
288       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
289       this factor is absolutely required, because the lw exitance (= out-going
290       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
291       where the reflectivity rho = 1-emissivity for conservation reasons. Once
292       this is established, we can remove the CPP-Flag (if we want to).
293    o pkg/seaice:
294      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
295        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
296      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
297        what the name implies (and not emissivity*BoltzmannConstant), this means
298        the old default value of 5.5e-8 now means
299        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
300        S/R exf_readparms
301      - FV-discretization of the B-grid LSOR solver, turn on with
302        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
303        of the calling routine dynsolver, so that B and C-grid code look a
304        little more alike.
305      - fix index bugs in ostres.F (B-grid code)
306    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
307    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
308      default for SEAICE_emissivity, if useEXF; requires setting a wrong
309      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
310      backward compatiblity
311    o model/src: use sigmaR in calc_ivdc
312    
313    checkpoint63g (2011/12/16)
314    o pkg/seaice/seaice_growth.F:
315      fix heat conservation of the coupled ocean-seaice system.
316      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
317      solid vs liquid water treatment is resolved via QNET.
318    o pkg/seaice/seaice_growth.F:
319      add missing term for sublimation in saltFlux, which was breaking conservation.
320    o pkg/seaice/seaice_model.F:
321      Remove this patholigical case treatment in evolution branch,
322      where it is un-necessary and breaks conservation.
323      Update global_ocean.cs32x15/results accordingly for
324      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
325    o model/src:
326      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
327      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
328    o pkg/obcs:
329      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
330      tendency for temperature and salinity that is then applied to update
331      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
332      horizontal advection and diffusion contributions on the boundary (in
333      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
334      removing the mask in S/R timestep_tracer. The advantage of this approach is
335      that the updated tracer values include contributions from the surface
336      forcing and vertical diffusion.
337      This modification changes exp4.stevens because of vertical diffusion.
338    o model/src:
339      change non-curvilinear grid setting to also work with exch2 + blank tiles:
340      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
341        face dimensions.
342      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
343        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
344        and INI_SPHERICAL_POLAR_GRID.
345      change test-experiment global_ocean.90x40x15:
346      - split the domain in many more tiles (9x4 tiles of 10x10 each);
347      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
348      - update results of both test (std & dwnslp).
349    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
350       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
351    o model/src:
352      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
353        and fix initialisation when using sigma-coords.
354    o model/src:
355     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
356       to their current value at the beginning of forward_step.F": add a new run-time
357       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
358     - set doResetHFactors=T in the following test exp:
359        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
360        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
361        and tutorial_global_oce_in_p (nonLinFS in p)
362    o pkg/ecco
363      - added IES cost term
364    o verification/advect_xz
365      - scale down the depth by 1/100 (from 200 km to just 2.km)
366      - add secondary test using divergent flow, r-star and implicit vertical advection.
367      - add note (check_conserve_TS.txt) and matlab script to check global
368        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
369    o pkg/rbcs:
370      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
371    o pkg/obcs (Stevens BCs):
372      - fix various problems in the phase speed computations of the Stevens
373        boundary conditions:
374        - sign error for western and southern boundaries,
375        - time tendencies were underestimated by factor of dTracerLev and some just
376          zero (for multidim advection schemes) -> now estimate time tendencies
377          from difference between previous (n) time level and the one before (n-1);
378          this requires storing a field per tracer per boundary, also in the pickup
379          files.
380        - replace deltaTmom in cflMer/Zon computation with dTracerLev
381        - set default phase velocity to cflMer/Zon
382      - update verification experiment exp4.stevens
383    o pkg/generic_advdiff (implicit_r):
384      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
385        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
386      - fix implicit vertical diffusion or advection with NonLin FreeSurf
387        (was using current recip_hFacC instead of future recip_hFacC): set future
388        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
389        solver S/R ;
390      - fill diagnostics of vertical advective fluxes (computed from tendency)
391        when using implicit vert. advection;
392      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
393         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
394         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
395         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
396    o pkg/diagnostics:
397      - add diags for T & S tendency which goes through Adams-Bashforth.
398    
399    checkpoint63f (2011/11/30)
400    o pkg/obcs/obcs_calc_stevens.F:
401      - join some loops to reduce number of if-statements
402      - fix a bug in code for northern and southern boundaries.
403    o pkg/seaice/seaice_init_varia.F
404      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
405        caused zero ice-velocities for the B-grid code
406    o pkg/seaice/seaice_init_fixed.F
407      - fix a bug in the initialisation of the second metric terms
408        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
409      - this affects all seaice configurations with useCurviLinearGrid = .true.
410        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
411        = .true. (default)
412      - the only verification experiment affected is global_ocean.cs32x15:
413        icedyn, seaice, and seaice_dynmix (AD)
414    o pkg/thsice/thsice_diagnostics_state.F
415      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
416        not contain garbage that can lead to surprises in diagstats_calc.F
417    o model/src:
418      - move bi,bj loops inside INTEGR_CONTINUITY ;
419      - call INTEGR_CONTINUITY directly from forward_step.F
420        (previously called from momentum_correction_step.F)
421      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
422        forward_step.F and pkg/ecco/the_main_loop.F
423    o model/src/do_oceanic_phys.F:
424      - reset addMass to zero only if useICEFRONT ;
425      - separated k-loop for rhoInSitu calculation ;
426      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
427        and at constant T,S (= WdRHOdP);
428      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
429        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
430        transport of locally-referenced potential density);
431        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
432    o gluemnc:
433      - replace ncrcat with ncks when adding variables to *.glob.nc
434      - change the way variables without record dimensions are handled so that
435        files that have variables with and without record variables can be glued:
436        add a record dimension with a new unique name to be able to differentiate
437        between variable with and without a-prior record dimensions. Remove
438        this record dimension before adding the variable to the *.glob.nc file.
439        This procedure automatically works also for grid.*.nc files that do not
440        have any record dimension.
441    o verification/cpl_aim+ocn:
442      - generate new reference output on baudelaire (gfortran, mpich2) (previously
443        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
444    o pkg/obcs/obcs_calc_stevens.F:
445      - add code for northern and southern boundaries.
446      - reorder some loops to save some operations and so that drFBar can be scalar
447    o model/src:
448      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
449        truncation) and add diagnostics for Adams-Bashforth tendency increment.
450      - update test-exp. AD output:
451        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
452      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
453        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
454        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
455        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
456        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
457        tutorial_plume_on_slope.
458    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
459      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
460      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
461      does not even come with an F77 compiler anymore, this should not be
462      a limitation
463    
464    checkpoint63e (2011/11/06)
465    o pkg/seaice adjoint of LSR:
466      - substantially rework STORE dirs.
467      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
468        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
469        and only perform SOLV_MAX_FIXED adjoint iters.
470        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
471        always goes to same record, meaning that the last forward field will be
472        the one used in the adjoint - an approximation.
473      - now produces non-zero LSR-related gradients, and acceptable gradients for
474        An's zonal (x-z) test case (to be checked in)
475      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
476        (but these are screwed up by the thermodynamics in the first place);
477        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
478        output_adm.txt also reflects changes to seaice_lsr
479      - global_ocean.cs32x15:
480        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
481          (output_adm.seaice.txt was updated)
482        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
483          (output_adm.seaice_dynmix.txt)
484    o test-exp. exp4+stevens:
485      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
486    o pkg/seaice (lsr solver):
487      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
488        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
489      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
490      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
491        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
492      - compute (with new S/R) and print initial (+ free-driff sol. if available)
493        and final residual of linearised system.
494    o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
495      (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
496    o pkg/obcs: Stevens BCs (still only for east and west)
497      - fix Stevens BCs by using intermediate velocities of previous
498        time step as "baroclinic" contribution rather velocity of one grid cell
499        inside the boundaries; more consistent but makes the entire treatment
500        more complicated, requires new pickup files and two new S/Rs:
501        obcs_copy_uv_n and obcs_save_uv_n
502        keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
503        (undefined by default)
504      - silently move computation of some grid factors into separate loops to
505        save some recomputations
506      - add a hack for non-linear free surface
507      - add a verification experiment to exp4 that tests this code
508    o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
509    
510    checkpoint63d (2011/10/25)
511    o pkg/obcs + seaice-dynamics:
512      - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
513        solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
514        values (consistent with an implicit method).
515      - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
516        return to older implementation (same results as before); note that none of
517        the "experimental" OBCS_SEAICE options are implemented in the new version.
518      - switch test exp. seaice_obcs to use new version (update output).
519    o pkg/seaice:
520      - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
521      - add parenthesis in Water-Ice drag calculations (evp & lsr);
522      - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
523        and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
524      - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
525        and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
526    o pkg/layers:
527      - Include potential density as new coordinate (Thanks to David Munday)
528    o pkg/dic:
529      - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
530        carbonate computation/output to CALC_PCO2_APPROX
531    o pkg/generic_advdiff
532      - make TAF generate code that vectorizes:
533        gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
534    o model/src:
535      - improve vectorization also for adjoint code of
536        solve_tridiagonal and solve_pentadiagonal. As this requires up to
537        5 new 3D-fields, this code is only turned on for the combination of
538        ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
539        for singular matrix check (only for TARGET_NEC_SX).
540      - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
541        ALLOW_AUTODIFF. This flag now needs to be set outside of
542        solve_tri/pentadiagonal.F
543    o pkg/exf:
544      - fix previous modif in exf_readparms.F (revision 1.66: treatment of
545        optional namelist EXF_NML_OBCS).
546      - add many debug-print (to trace down where pkg/cal error msg comes from)
547    o pkg/mom_vecinv/mom_vi_hdissip.F
548      - rearrange loops so that vectorization is improved and in particular
549        the adjoint routine vectorizes. The code is a little longer now, but I
550        think easier to read.
551        Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
552    o pkg/seaice:
553      - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
554    o pkg/exch2:
555      - alternative code (without tile x tile matrix) for cumulated (global) sum;
556        used as default; keep using matrix version in adjustment.cs-32x32x1.
557  o tools/build_options:  o tools/build_options:
558    - after merging some MPI and/or multi-threads specific optfiles so that    - after merging some MPI and/or multi-threads specific optfiles so that
559      the modified default optfile support both built (using genmake2 -mpi      the modified default optfile support both built (using genmake2 -mpi

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