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revision 1.1469 by ifenty, Wed Jun 29 21:44:26 2011 UTC revision 1.1607 by dimitri, Sun Mar 4 23:32:55 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      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
17    o pkg/shelfice/shelfice_thermodynamics.F
18      - fix exponents for velocity dependent exchange coefficients: change
19        from 2/3(=0) to 0.66666666666666667
20      - move computation of velocity dependent exchange coefficients into
21        separate loop, so that it applies to both thermodynamics
22      - move some divisions by constants out of loops
23    
24    checkpoint63j (2012/02/16)
25    o pkg/seaice:
26      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
27      - SItracer:  added run time params, and allow coupling to ocn salinity.
28    o pkg/seaice: remove (almost) all divisions by constants within loops
29      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
30      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
31      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
32      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
33    o pkg/seaice :
34      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
35        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
36      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
37      - add permanent SItflux diag that corresponds to TFLUX but includes
38        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
39      - allow activation/testing of a fix for suspected missing term in
40        ocn-ice heat budget (to be confirmed). To test this, you want to
41        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
42        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
43      - no change in results, fwd or ad.
44    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
45      - switch to variable freezing point.
46           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
47      - bug fix : the sublimation term that was missing is now activated.
48           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
49      - bug fix : flooding sign term for SIsal0.NE.0.
50           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
51    o pkg/seaice:
52      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
53        is now the default, and the old default constant freezing point is recovered
54        with SEAICE_tempFrz0    = -1.96,
55             SEAICE_dTempFrz_dS = 0.,
56      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
57      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
58      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
59        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
60      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
61        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
62      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
63        seaice_growth r149 for legacy branch (no results change).
64      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
65        from I. Fenty).
66      - results did not change except for global_ocean.cs32x15, mostly due to the
67        switch to variable freezing point (see above item for detail).
68    o pkg/thsice:
69      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
70        seawater freezing in thsice_calc_thickn (not used).
71    o pkg/seaice: turbulent flux term specification via run time params.
72      - replace CPP switches with run time switches to facilitate testing
73      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
74                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
75      - added runtime parameter : SEAICEturbFluxFormula
76      - move Mcphee constants to SEAICE_PARAMS.h
77      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
78                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
79                 remove seaice_summary call (moved to seaice_init_fixed)
80      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
81        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
82      - seaice_summary.F : add missing report of read turbulent flux term set up
83                           and SITRACER.
84      - seaice_check.F : check range; inform and stop if retired CPPs are used
85                         (incl. SEAICE_AGE).
86      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
87             CPP switch, same computation as before for the different options.
88      - change results at the truncation level.
89    o pkg/seaice:
90      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
91        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
92        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
93      - update verification/*/input*/data.seaice:
94        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
95        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
96        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
97        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
98    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
99      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
100        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
101        difference in results only due to machine truncation.
102      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
103        MaykutPolySatVap; keep MIN_LWDOWN.
104      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
105      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
106        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
107    o pkg/salt_plume:
108      - isolate saltPlumeFlux array exch into a specific S/R called from
109        do_oceanic_phys.F
110      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
111    o verification:
112      - move untested set-up to MITgcm_contrib/verification_other.
113    o pkg/seaice:
114      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
115    o pkg/seaice:
116      - seaice_solve4temp.F (keeping results unchanged):
117        * add 2 future run-time params to select which saturation vapor pressure
118          formula is used and how post-iteration fluxes are set.
119          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
120        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
121          the linearized expression to stay consistent with tsurf finding.
122      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
123        can be < 0.
124    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
125      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
126        conductive heat flux F_c , and add it explicitly when updating tsurf as
127        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
128        so that now F_ia has a consistent meaning through the entire routine.
129        This causes differences at truncation level: update output of fwd exp.
130        global_ocean.cs32x15.seaice.
131    o pkg/seaice:
132      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
133        of arrays, sign/direction of fluxes; no effect on results.
134      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
135        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
136        note: this should have been done before changing celsius2K default.
137      - to keep results unchanged, add back old value of celsius2K in verification
138        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
139      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
140        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
141        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
142        freezing temp is consistent with value in seaice_growth.F ; this causes
143        differences at machine truncation level: update lab_sea AD output (3/4).
144    o pkg/seaice:
145      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
146        and climsst/sss even when using seaice (to prevent calculation that might
147        use SST on land); does not affect any verification exp.
148      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
149        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
150    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
151      over land (non-legacy code)
152    o vectorize salt_plume package:
153      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
154      - this code computes plumebk everywhere (also over land), thus requires
155        code to avoid divisions by zero and catch the case of kLev=Nr.
156      - efficiency of salt_plume_frac is still sub-optimal
157    o tools (genmake2):
158      - fix makefile NAME specification (option: -makefile NAME) by adding
159        "-f $MAKEFILE" in few places where it was missing including makedepend
160        command (contribution from Paul).
161    
162    checkpoint63i (2012/01/24)
163    o model/src:
164      - add factorized versions of some EOS code to find_rho.F,
165        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
166    o model/src:
167      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
168      - change default celsius2K from 273.16 to 273.15
169      - to keep results unchanged, add back old value of celsius2K in verification
170        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
171         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
172    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
173      to make TAF generate vectorizable code
174    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
175       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
176       have flags that do this more efficiently.
177    o pkg/diagnostics/diagstats_calc.F
178      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
179    o pkg/obcs (with exch2):
180      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
181        and remove code (in obcs_readparms.F) which was based on EXCH of indices
182        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
183    o pkg/exf and seaice exp:
184      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
185        so that switching off area & heff advection flags does not affect results.
186      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
187      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
188        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
189        results of verification experiments: 1D_ocean_ice_column(fwd),
190        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
191        and offline_exf_seaice (all 4).
192    o pkg/seaice:
193      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
194        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
195      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
196        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
197        not multi-dim advection;
198      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
199        SHORTWAVE_HEATING #undef.
200    o optim: make Makefile more robust (?)
201    o pkg/obcs:
202      * fix treatment of obcs_read_pickup for TAF
203    o pkg/shelfice:
204      * add missing initialisation of num_shifwflx
205      * new adjoint verification exp. for isomip
206      * change Prandtl and Schmidt numbers from generic formulations
207        (in terms of model diffus. and visc.) to separate runtime
208        parameters, with Holland and Jenkins (1999) default values.
209    o pkg/exf (interpolation):
210      - extended input field (2 rows) near the N & S poles:
211        * fill in with the symetric value (when even Nb of data in longitude)
212        * add average value at the poles only for scalar quantities ; for vector
213          component interpolation, skip the averaging and keep duplicated values,
214          unless the 2 components have same location (uvInterp=T) in which case
215          interpolate the 2 components together using S/R EXF_INTERP_UV.
216      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
217        together: this allows to account properly for local orientation when
218        averaging at N & S pole.
219      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
220        exf-interpolation near N & S poles. Undef by default.
221      - add debug check/print on 1rst iter if debugLevel >=2.
222    o pkg/exf:
223      - change masking flags definition (no longer "parameter"), put them in
224        common block and set them in S/R EXF_INIT_FIXED.
225      - change recognized masking flag from s,u,v to c,w,s since the mask
226        to use (maskC,W,S) depends on position on model grid and has little to
227        do with scalar/vector difference; fix masking if using P-coordinates.
228      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
229        and update results of exp. global_with_exf (x2).
230      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
231    o pkg/obcs
232      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
233    o pkg/exf (interpolation):
234      - assume periodicity in X only if input field cover full longitude range.
235      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
236        and should vectorise).
237      - fix input lat of the 2 added row (in case we provide N.pole data).
238    
239    checkpoint63h (2011/12/30)
240    o pkg/seaice:
241      - change declaration of UVM from _RL to _RS in order to get B-grid
242        uIce,vIce monitor when _RS = real*4
243    o pkg/offline:
244      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
245      - compute vertical velocity if not read from file (switch on exactConserv
246        & staggerTimeStep);
247      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
248    o verification:
249      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
250        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
251        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
252      - update output of exp. global_ocean.cs32x15.viscA4 after changing
253        grid-file angles (used here for coriolis-3d);
254      - remove (or gzip) few files not needed to run fizhi-cs experiments.
255    o pkg/exf (vector interpolation):
256      - rotate vector component toward local grid-axis orientation using grid-angles
257        (stored in GRID.h) instead of locally computed rotation angle; keep old code
258        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
259    o pkg/seaice:
260      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
261        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
262    o pkg/PKG_OPTIONS.h files:
263      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
264        outside of the #ifdef ALLOW_THISPKG / #endif block.
265      - update verification/*/code/PKG_OPTIONS.h files.
266    o add a verification experiment (offline_exf_seaice/input.seaice) that test
267      the B-grid LSOR solver
268    o pkg/seaice: sort out emissivity and long wave radiation step 2:
269      - add emissivity for snow and ice as new run-time parameters
270        (unfortunately) that default to the corresponding exf values; this
271        changes results in most verification experiments so that for backward
272        compatibility these parameter have to be set explicitly to inconsistent
273        values (ugly);
274      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
275        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
276        until we agree how to handle this bug properly
277    o pkg/exf (interpolation):
278      - add a set of run-time param ({inputfield}_interpMethod), one for
279        each interpolated input field, to select the interpolation method
280        with a value of zero switching off the interpolation;
281      - print interpolation parameters to standard output;
282      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
283        (to use instead runoff_interpMethod=0 in data.exf).
284      - simplify default setting of interpolation parameters (for all fields,
285        set position to match model grid cell-center position, leading to trivial
286        interpolation in case of regular Lat-Lon grid) and fix for the case of
287        non-uniform delY.
288    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
289       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
290       this factor is absolutely required, because the lw exitance (= out-going
291       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
292       where the reflectivity rho = 1-emissivity for conservation reasons. Once
293       this is established, we can remove the CPP-Flag (if we want to).
294    o pkg/seaice:
295      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
296        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
297      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
298        what the name implies (and not emissivity*BoltzmannConstant), this means
299        the old default value of 5.5e-8 now means
300        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
301        S/R exf_readparms
302      - FV-discretization of the B-grid LSOR solver, turn on with
303        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
304        of the calling routine dynsolver, so that B and C-grid code look a
305        little more alike.
306      - fix index bugs in ostres.F (B-grid code)
307    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
308    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
309      default for SEAICE_emissivity, if useEXF; requires setting a wrong
310      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
311      backward compatiblity
312    o model/src: use sigmaR in calc_ivdc
313    
314    checkpoint63g (2011/12/16)
315    o pkg/seaice/seaice_growth.F:
316      fix heat conservation of the coupled ocean-seaice system.
317      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
318      solid vs liquid water treatment is resolved via QNET.
319    o pkg/seaice/seaice_growth.F:
320      add missing term for sublimation in saltFlux, which was breaking conservation.
321    o pkg/seaice/seaice_model.F:
322      Remove this patholigical case treatment in evolution branch,
323      where it is un-necessary and breaks conservation.
324      Update global_ocean.cs32x15/results accordingly for
325      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
326    o model/src:
327      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
328      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
329    o pkg/obcs:
330      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
331      tendency for temperature and salinity that is then applied to update
332      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
333      horizontal advection and diffusion contributions on the boundary (in
334      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
335      removing the mask in S/R timestep_tracer. The advantage of this approach is
336      that the updated tracer values include contributions from the surface
337      forcing and vertical diffusion.
338      This modification changes exp4.stevens because of vertical diffusion.
339    o model/src:
340      change non-curvilinear grid setting to also work with exch2 + blank tiles:
341      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
342        face dimensions.
343      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
344        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
345        and INI_SPHERICAL_POLAR_GRID.
346      change test-experiment global_ocean.90x40x15:
347      - split the domain in many more tiles (9x4 tiles of 10x10 each);
348      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
349      - update results of both test (std & dwnslp).
350    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
351       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
352    o model/src:
353      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
354        and fix initialisation when using sigma-coords.
355    o model/src:
356     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
357       to their current value at the beginning of forward_step.F": add a new run-time
358       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
359     - set doResetHFactors=T in the following test exp:
360        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
361        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
362        and tutorial_global_oce_in_p (nonLinFS in p)
363    o pkg/ecco
364      - added IES cost term
365    o verification/advect_xz
366      - scale down the depth by 1/100 (from 200 km to just 2.km)
367      - add secondary test using divergent flow, r-star and implicit vertical advection.
368      - add note (check_conserve_TS.txt) and matlab script to check global
369        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
370    o pkg/rbcs:
371      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
372    o pkg/obcs (Stevens BCs):
373      - fix various problems in the phase speed computations of the Stevens
374        boundary conditions:
375        - sign error for western and southern boundaries,
376        - time tendencies were underestimated by factor of dTracerLev and some just
377          zero (for multidim advection schemes) -> now estimate time tendencies
378          from difference between previous (n) time level and the one before (n-1);
379          this requires storing a field per tracer per boundary, also in the pickup
380          files.
381        - replace deltaTmom in cflMer/Zon computation with dTracerLev
382        - set default phase velocity to cflMer/Zon
383      - update verification experiment exp4.stevens
384    o pkg/generic_advdiff (implicit_r):
385      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
386        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
387      - fix implicit vertical diffusion or advection with NonLin FreeSurf
388        (was using current recip_hFacC instead of future recip_hFacC): set future
389        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
390        solver S/R ;
391      - fill diagnostics of vertical advective fluxes (computed from tendency)
392        when using implicit vert. advection;
393      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
394         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
395         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
396         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
397    o pkg/diagnostics:
398      - add diags for T & S tendency which goes through Adams-Bashforth.
399    
400    checkpoint63f (2011/11/30)
401    o pkg/obcs/obcs_calc_stevens.F:
402      - join some loops to reduce number of if-statements
403      - fix a bug in code for northern and southern boundaries.
404    o pkg/seaice/seaice_init_varia.F
405      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
406        caused zero ice-velocities for the B-grid code
407    o pkg/seaice/seaice_init_fixed.F
408      - fix a bug in the initialisation of the second metric terms
409        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
410      - this affects all seaice configurations with useCurviLinearGrid = .true.
411        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
412        = .true. (default)
413      - the only verification experiment affected is global_ocean.cs32x15:
414        icedyn, seaice, and seaice_dynmix (AD)
415    o pkg/thsice/thsice_diagnostics_state.F
416      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
417        not contain garbage that can lead to surprises in diagstats_calc.F
418    o model/src:
419      - move bi,bj loops inside INTEGR_CONTINUITY ;
420      - call INTEGR_CONTINUITY directly from forward_step.F
421        (previously called from momentum_correction_step.F)
422      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
423        forward_step.F and pkg/ecco/the_main_loop.F
424    o model/src/do_oceanic_phys.F:
425      - reset addMass to zero only if useICEFRONT ;
426      - separated k-loop for rhoInSitu calculation ;
427      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
428        and at constant T,S (= WdRHOdP);
429      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
430        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
431        transport of locally-referenced potential density);
432        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
433    o gluemnc:
434      - replace ncrcat with ncks when adding variables to *.glob.nc
435      - change the way variables without record dimensions are handled so that
436        files that have variables with and without record variables can be glued:
437        add a record dimension with a new unique name to be able to differentiate
438        between variable with and without a-prior record dimensions. Remove
439        this record dimension before adding the variable to the *.glob.nc file.
440        This procedure automatically works also for grid.*.nc files that do not
441        have any record dimension.
442    o verification/cpl_aim+ocn:
443      - generate new reference output on baudelaire (gfortran, mpich2) (previously
444        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
445    o pkg/obcs/obcs_calc_stevens.F:
446      - add code for northern and southern boundaries.
447      - reorder some loops to save some operations and so that drFBar can be scalar
448    o model/src:
449      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
450        truncation) and add diagnostics for Adams-Bashforth tendency increment.
451      - update test-exp. AD output:
452        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
453      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
454        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
455        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
456        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
457        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
458        tutorial_plume_on_slope.
459    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
460      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
461      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
462      does not even come with an F77 compiler anymore, this should not be
463      a limitation
464    
465    checkpoint63e (2011/11/06)
466    o pkg/seaice adjoint of LSR:
467      - substantially rework STORE dirs.
468      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
469        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
470        and only perform SOLV_MAX_FIXED adjoint iters.
471        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
472        always goes to same record, meaning that the last forward field will be
473        the one used in the adjoint - an approximation.
474      - now produces non-zero LSR-related gradients, and acceptable gradients for
475        An's zonal (x-z) test case (to be checked in)
476      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
477        (but these are screwed up by the thermodynamics in the first place);
478        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
479        output_adm.txt also reflects changes to seaice_lsr
480      - global_ocean.cs32x15:
481        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
482          (output_adm.seaice.txt was updated)
483        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
484          (output_adm.seaice_dynmix.txt)
485    o test-exp. exp4+stevens:
486      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
487    o pkg/seaice (lsr solver):
488      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
489        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
490      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
491      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
492        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
493      - compute (with new S/R) and print initial (+ free-driff sol. if available)
494        and final residual of linearised system.
495    o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
496      (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
497    o pkg/obcs: Stevens BCs (still only for east and west)
498      - fix Stevens BCs by using intermediate velocities of previous
499        time step as "baroclinic" contribution rather velocity of one grid cell
500        inside the boundaries; more consistent but makes the entire treatment
501        more complicated, requires new pickup files and two new S/Rs:
502        obcs_copy_uv_n and obcs_save_uv_n
503        keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
504        (undefined by default)
505      - silently move computation of some grid factors into separate loops to
506        save some recomputations
507      - add a hack for non-linear free surface
508      - add a verification experiment to exp4 that tests this code
509    o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
510    
511    checkpoint63d (2011/10/25)
512    o pkg/obcs + seaice-dynamics:
513      - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
514        solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
515        values (consistent with an implicit method).
516      - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
517        return to older implementation (same results as before); note that none of
518        the "experimental" OBCS_SEAICE options are implemented in the new version.
519      - switch test exp. seaice_obcs to use new version (update output).
520    o pkg/seaice:
521      - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
522      - add parenthesis in Water-Ice drag calculations (evp & lsr);
523      - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
524        and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
525      - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
526        and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
527    o pkg/layers:
528      - Include potential density as new coordinate (Thanks to David Munday)
529    o pkg/dic:
530      - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
531        carbonate computation/output to CALC_PCO2_APPROX
532    o pkg/generic_advdiff
533      - make TAF generate code that vectorizes:
534        gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
535    o model/src:
536      - improve vectorization also for adjoint code of
537        solve_tridiagonal and solve_pentadiagonal. As this requires up to
538        5 new 3D-fields, this code is only turned on for the combination of
539        ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
540        for singular matrix check (only for TARGET_NEC_SX).
541      - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
542        ALLOW_AUTODIFF. This flag now needs to be set outside of
543        solve_tri/pentadiagonal.F
544    o pkg/exf:
545      - fix previous modif in exf_readparms.F (revision 1.66: treatment of
546        optional namelist EXF_NML_OBCS).
547      - add many debug-print (to trace down where pkg/cal error msg comes from)
548    o pkg/mom_vecinv/mom_vi_hdissip.F
549      - rearrange loops so that vectorization is improved and in particular
550        the adjoint routine vectorizes. The code is a little longer now, but I
551        think easier to read.
552        Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
553    o pkg/seaice:
554      - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
555    o pkg/exch2:
556      - alternative code (without tile x tile matrix) for cumulated (global) sum;
557        used as default; keep using matrix version in adjustment.cs-32x32x1.
558    o tools/build_options:
559      - after merging some MPI and/or multi-threads specific optfiles so that
560        the modified default optfile support both built (using genmake2 -mpi
561        for the MPI built, using genmake2 -omp for OpenMP built),
562        move now obsolete optfiles to tools/build_options/unsupported/
563       (add copy of email sent to support list in doc/optfiles_changes.txt)
564    
565    checkpoint63c (2011/09/28)
566    o pkg/ebm:
567      - fix ebm_zonalmean.F for several procs in Ydir (nPy > 1); update output of
568        test exp. global_ocean_ebm (affects machine truncation, 12 digits for cg2d)
569    o pkg/seaice (SItracer pickup)
570    * Simple code for pickup of SItracer fields (#define ALLOW_SITRACER)
571      To be done:
572      - thorough testing of missing fields in S/R seaice_read_pickup
573      - thorough matching between generic tracers and specific fields used
574        (e.g. volume-weighted age, area-weighted age, salinity, ...)
575    o pkg/grdchk:
576      - all procs calculate and print finite-difference gradient (for testreport)
577      - change description output used by testreport;
578      - AD testing: also compare and report Finite-difference gradient;
579        => update all output_adm*.txt
580    o test exp. global_ocean_ebm:
581      - switch back useRealFreshWaterFlux (no problem anymore with run-off);
582        and turn on exactConserve; update (fwd) output.
583    o pkg/seaice (LSR):
584      - print to STDOUT number of solver iterations at SEAICE_monFreq interval.
585      - modify solver to deal cleanly with u/v switch at face edges (CS-grid):
586        * identical results with non-CS topology (but save up to half of EXCH calls)
587        * no much changes in cs-32 verification tests since no ice at face edges
588         (differences due to convergence criteria, since nb of iterations changed)
589        * expect some differences on lat-lon-cap grid.
590        update FWD results of global_ocean.cs32x15 test exp. (icedyn & seaice)
591    o pkg/exch2:
592      - add new CPP option to disable Cumul-Sum matrix (to save storage when using
593        many tiles); until alternative coding is added, just add a stop.
594    o pkg/kpp:
595      - move ptracer/salt correction to KPP diffusivity from calc_3d_diffusivity.F
596        to S/R KPP_CALC_DIFF_PTR (+ add tracer-index to argument list).
597    o optfiles:
598      - merged few MPI specific (*+mpi*) and multi-threads specific (*+mth) optfiles
599        into corresponding standard one, which now support different build:
600        (when using "genmake2 -mpi" for MPI built, "genmake2 -omp" for OpenMP built)
601      - add "darwin_amd64_gfortran" optfile (initially from Constantinos, tested by Gael)
602    o pkg/obcs (seaice):
603      - add missing EXCH for uIce,vIce after applying OBCS;
604      - remove S/R EXF_SWAPFFIELDS_X/Y , disable S/R EXF_SET_OBCS_X/Y by adding
605        argument = number of levels to S/R EXF_SWAPFFIELDS_XZ/YZ and S/R
606        EXF_SET_OBCS_XZ/YZ ; update obcs_exf_load.F;
607      - fix EXF_SET_OBCS_XZ/YZ for multi-threaded (assuming loaded arrays are shared)
608      - verification exp. seaice_obcs: split domain in 2 tiles ; add SIZE.h_mpi
609        and eedata.mth for MPI and mutlti-threaded testing.
610    o pkg/flt:
611      - make FLT EXCH working with multi-threads (and MPI + multi-threads);
612      - use buffer for floats IO (trajectories & profiles); size set in FLT_SIZE.h;
613      - fix pickup and trajectories + profiles output with multi-threads;
614      - add parameter to select group of fields to write along trajectory and
615        profile (default unchanged);
616      - only call PORT_RAND* function when flt_noise <> 0;
617      - add multi-threaded test for verification exp. flt_example.
618    o eesupp/src:
619      - fix S/R ALL_PROC_DIE for MPI+multi-threads.
620      - USE_OMP_THREADING: check that number of threads (from eedata) matches
621        actual number (from env.var. setting).
622    o pkg/ebm:
623      - fix multi-threading in ebm_area_t.F ; clean-up EBM.h header file.
624      - add multi-threaded test for verification exp. global_ocean_ebm
625    
626    checkpoint63b (2011/08/29)
627    o pkg/ebm:
628      - fix sign of runoff;
629      - update directly forcing fields (Qnet,EmPmR) to use standard
630        external_forcing_surf.F (remove ebm_forcing_surf.F);
631      - avoid loading forcing fields a 2nd time (1rst time from ini_forcing.F);
632      - set either tauThetaClimRelax (in data) or tauThetaZonRelax (in data.ebm)
633        and apply relaxation towards corresponding SST field (2-D map or ZonAver).
634      - update global_ocean_ebm parameters file data and update output (fwd+ad).
635    o verification/matrix_example:
636      - split domain in 8 tiles (2x4); add SIZE.h_mpi and eedata.mth for
637        MPI and mutlti-threaded testing.
638    o pkg/matrix:
639      - change name of S/R MATRIX_INIT to S/R MATRIX_INIT_VARIA ;
640      - fix for multi-tiles (add bi,bj indices to exp/impMatrixCounter);
641      - fix for multi-threaded (remove DATA statement);
642      - use standard DIFFERENT_MULTIPLE function;
643      - add MATRIX_OPTIONS.h
644    o verification/matrix_example:
645       To allow to split the domain in several tiles, change the domain size
646        from 31x31 to 32x32 by adding 1 row (on Southern side) + 1 column (on
647        Western side) of land points.
648    o (*_)write_pickup:
649      - fix few bugs in mypackage_read/write_pickup.F
650      - in MDS_WR_METAFILES calls, replace "myTime" by a local copy into
651        array of length 1 (was caught by compiler syntax-check).
652    o pkg/diagnostics (velocity potential solver):
653      - fix initialisation of main diagonal matrix (for overlap values)
654    o tools/build_options:
655      - towards single optfile for MPI and non-MPI built: merge few +mpi optfile
656        into previously non MPI one (linux_am64 pgf77,open64,pathf90,ifort11)
657      - linux_amd64_gfortran: merge +mpi_generic version into standard optfile:
658        * move IEEE flags to DEVEL section; take IEEE flags from +mpi_generic ;
659        * FAST case: for now, keep -O3 with ini_masks_etc.F in NOOPTFILES list;
660        and use "-devel" testreport option for standard testing on baudelaire.
661    o pkg/grdchk:
662      - Assume that all gradient-check position are within the same tile
663        corresponding to global indices (iGloTile,jGloTile) and that
664        positions (i,j indices or nbeg) are local to this tile;
665      - set tile local-indices and proc. number according to tile global-indices;
666      - remove grdchkwhichproc from namelist (retired param);
667      - send adjoint gradient to all procs so that all procs print it to STDOUT;
668      - switch on MPI test for global_ocean.90x40x15 AD test experiment.
669    o adding package bbl (Bottom Boundary Layer)
670      description in MITgcm/pkg/bbl/bbl_description.tex
671      example/test experiment in MITgcm_contrib/bbl
672    o adjoint verifications
673      - changed 5 experiments to multi-tiles
674        * global_ocean.90x40x15
675        * obcs_ctrl
676        * offline_exf_seaice
677        * tutorial_dic_adjoffline
678        * tutorial_tracer_adjsens
679        changed reference output for those that crossed tile boundaries
680        (changed choices of gradient check positions)
681      - with same tiling, switch on MPI test for the last 4 (add SIZE.h_mpi)
682      - temporary bug fix in grdchk_loc.F for obcs
683    o genmake2 & testreport
684      - add target "obj" (just for OBJFILES files) to Makefile;
685      - add option to specify FEXTRAFLAGS on command line.
686    o pkg/mypackage:
687      - remove bi,bj arguments from argument list of S/R MYPACKAGE_CALC_RHS
688    
689    checkpoint63a (2011/08/02)
690    o pkg/diagnostics (velocity potential):
691      - fix velocity-potential calculation when using OBCS: balance net inflow
692        at each level (new S/R OBCS_DIAG_BALANCE).
693      - fix some of the problems with OBCS in stream-function calculation.
694    o pkg/exf/exf_readparms.F
695      - make treatment of optional namelists (EXF_NML_04, EXF_NML_SGRUNOFF,
696        EXF_NML_OBCS) more consistent, so that you need not have these lists
697        in data.exf when they are not used.
698    o optim/optim_readdata.F:
699      - add some output about obcs variables that might help debugging
700      - add a check about nvarlength
701    o pkg/ctrl: once again, fix computation of endrec in s/r ctrl_init_rec
702    o pkg/diagnostics (velocity potential):
703      - fix mask for OBCS (still problems in stream-function with OBCS);
704      - add specific parameter (default = main code CG2D params) for solver;
705      - in case of poor convergence, use solution corresponding to lowest residual.
706    o pkg/seaice/seaice_growth.F: small changes that permit vectorizable
707      adjoint code. In general statements like tmpscal=fld(i,j) are problematic
708      and should be avoided where possible.
709    o model/src (rStar):
710      - include r* effect on reference-state (PhiRef) in totPhiHyd
711        (so that it's really the potential anomaly at the cell center);
712        affect solution only if z* with full pressure in EOS.
713      - test-exp global_ocean.90x40x15: reduce viscA4 (was not stable) and
714        update output (because of z* in totPhiHyd and viscA4 changes);
715      - keep the previous diagnostics as "PHIHYDcR" (closer to potential anomaly
716        @ constant r) until interpolation at constant r is implemented.
717    o pkg/diagnostics
718      - fix RCENTER diagnostics in case cell center is not at interface middle
719    o add code for TEOS-10 (www.teos-10.org, McDougall et al. 2011). Use
720      this eos with eosType = 'TEOS10', in data (PARM01). This eos implies
721      that THETA and SALT are "conservative temperature" and "absolute
722      salinity"
723    o pkg/ctrl
724      - fix computation of endrec in s/r ctrl_init_rec
725      - ctrl_pack/unpack_*: remove unused variables and some obsolete code
726    o pkg/seaice/seaice_growth.F
727      - fix recomputation with FENTY_AREA_EXPANSION_CONTRACTION code,
728        remove then obsolete STORE directives
729      - fix STORE directives for tice and tices, so that only the
730        appropriate part of the fields are stored (and not the entire
731        field); update global_ocean.cs32x15.seaice AD output.
732      - cosmetic changes: adjust CPP flags and indentation for better
733        legibilty
734    o pkg/autodiff: add mnc-output of adBottomDragFld (code contributed by
735      Chris Wilson)
736    o pkg/gmredi:
737       Add Sub-Meso Eddies parameterisation from Baylor (for now, disabled with TAF),
738       and test it in verification exp. "front_relax.bvp" (update output.bvp.txt)
739    
740    checkpoint63  (2011/07/11)
741    o pkg/exch2:
742     - rename+move: nTiles in W2_EXCH2_PARAMS.h --> exch2_nTiles in W2_EXCH2_TOPOLOGY.h
743     - exch2 version of Cumul-Sum routine: S/R W2_SET_MAP_CUMSUM set up the
744       (2*nTiles)x(nTiles) Cumul-Sum matrix and Master Proc collects all tiles X,Y
745       increments, calculates Cumul-Sum @ tile origin and sends results to each tile.
746    o pkg/diagnostics:
747     - deal with pairs of post-processed diags which are computed together; in
748       particular, re-order list of diags within 1 file to save 2nd computation.
749     - add S/R to compute velocity stream-function (called after velocity-potential
750       calculation) from divergence free transport -> new diagnostics "PsiVEL".
751     - add parameter to select grid-point location where PsiVEL == 0.
752    o eesupp/src:
753       new S/R to calculate cumulated sum on tiled array, corner grid-cell location
754       (specific S/R needed with exch2 topology - for now, just print an error msg)
755  o pkg/shelfice  o pkg/shelfice
756   - Implement friction velocity-dependent transfer coefficients following   - Implement friction velocity-dependent transfer coefficients following
757     Holland and Jenkins, JPO, 1999     Holland and Jenkins, JPO, 1999
# Line 27  o pkg/seaice/seaice_growth.F: Line 775  o pkg/seaice/seaice_growth.F:
775      when SEAICE_ADD_SUBLIMATION_TO_FWBUDGET is used in conjunction with the      when SEAICE_ADD_SUBLIMATION_TO_FWBUDGET is used in conjunction with the
776      non-legacy seaice_solve4temp.      non-legacy seaice_solve4temp.
777    - add diagnostic of the residual sublimation freshwater flux (the freshwater    - add diagnostic of the residual sublimation freshwater flux (the freshwater
778      flux taken from the ocean if the total actual latent heat fluxes exceed      flux taken from the ocean if the total actual latent heat fluxes exceed
779      the maximum)      the maximum)
780    - remove the CPP switch around the *_FWbySublim unit change and move diagnostic    - remove the CPP switch around the *_FWbySublim unit change and move diagnostic
781     fill for SIatmQnt, SIfwSubl, SIatmFW to the end of seaice_growth.F.     fill for SIatmQnt, SIfwSubl, SIatmFW to the end of seaice_growth.F.

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