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revision 1.1542 by jmc, Tue Dec 6 00:42:26 2011 UTC revision 1.1597 by mlosch, Tue Feb 14 14:53:17 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: remove (almost) all divisions by constants within loops
8      in seaice_growth.F and seaice_solve4temp.F
9    o pkg/seaice :
10      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula.EQ.
11      1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
12      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
13      - add permanent SItflux diag that corresponds to TFLUX but includes
14      ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
15      - allow activation/testing of a fix for suspected missing term in
16      ocn-ice heat budget (to be confirmed). To test this, you want to
17      undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
18      SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
19      - no change in results, fwd or ad.
20    o global_ocean.cs32x15/results: three changes following from the pkg/seaice commit below.
21      - switch to variable freezing point.
22           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
23      - bug fix : the sublimation term that was missing is now activated.
24           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
25      - bug fix : flooding sign term for SIsal0.NE.0.
26           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
27    o pkg/seaice:
28      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
29     is now the default, and the old default constant freezing point is recovered with
30     SEAICE_tempFrz0    = -1.96,
31     SEAICE_dTempFrz_dS = 0.,
32      - retire SEAICE_freeze that was the old way of specifycing the constant freezing point.
33      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
34      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
35     activated. To reproduce old results that had this bug define SEAICE_DISABLE_SUBLIM.
36      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
37     was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
38      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
39     seaice_growth r149 for legacy branch (no results change).
40      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code from I. Fenty).
41      - results did not change except for global_ocean.cs32x15, mostly due to the switch
42      to variable freezing point (see above item for detail).
43    o pkg/thsice:
44      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
45        seawater freezing in thsice_calc_thickn (not used).
46    o pkg/seaice: turbulent flux term specification via run time params.
47      - replace CPP switches with run time switches to facilitate testing
48      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX, GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
49      - added runtime parameter : SEAICEturbFluxFormula
50      - move Mcphee constants to SEAICE_PARAMS.h
51      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
52        SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply); remove
53        seaice_summary call (moved to seaice_init_fixed)
54      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
55        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
56      - seaice_summary.F : add missing report of read turbulent flux term set up (and SITRACER).
57      - seaice_check.F : check range; inform and stop if retired CPPs are used (incl. SEAICE_AGE).
58      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
59            CPP switch, same computation as before for the different options.
60      - change results at the truncation level.
61    o pkg/seaice:
62      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
63        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
64        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
65      - update verification/*/input*/data.seaice:
66        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
67        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
68        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
69        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
70    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
71      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
72        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
73        difference in results only due to machine truncation.
74      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
75        MaykutPolySatVap; keep MIN_LWDOWN.
76      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
77      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
78        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
79    o pkg/salt_plume:
80      - isolate saltPlumeFlux array exch into a specific S/R called from
81        do_oceanic_phys.F
82      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
83    o verification:
84      - move untested set-up to MITgcm_contrib/verification_other.
85    o pkg/seaice:
86      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
87    o pkg/seaice:
88      - seaice_solve4temp.F (keeping results unchanged):
89        * add 2 future run-time params to select which saturation vapor pressure
90          formula is used and how post-iteration fluxes are set.
91          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
92        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
93          the linearized expression to stay consistent with tsurf finding.
94      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
95        can be < 0.
96    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
97      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
98        conductive heat flux F_c , and add it explicitly when updating tsurf as
99        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
100        so that now F_ia has a consistent meaning through the entire routine.
101        This causes differences at truncation level: update output of fwd exp.
102        global_ocean.cs32x15.seaice.
103    o pkg/seaice:
104      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
105        of arrays, sign/direction of fluxes; no effect on results.
106      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
107        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
108        note: this should have been done before changing celsius2K default.
109      - to keep results unchanged, add back old value of celsius2K in verification
110        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
111      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
112        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
113        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
114        freezing temp is consistent with value in seaice_growth.F ; this causes
115        differences at machine truncation level: update lab_sea AD output (3/4).
116    o pkg/seaice:
117      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
118        and climsst/sss even when using seaice (to prevent calculation that might
119        use SST on land); does not affect any verification exp.
120      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
121        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
122    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
123      over land (non-legacy code)
124    o vectorize salt_plume package:
125      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
126      - this code computes plumebk everywhere (also over land), thus requires
127        code to avoid divisions by zero and catch the case of kLev=Nr.
128      - efficiency of salt_plume_frac is still sub-optimal
129    o tools (genmake2):
130      - fix makefile NAME specification (option: -makefile NAME) by adding
131        "-f $MAKEFILE" in few places where it was missing including makedepend
132        command (contribution from Paul).
133    
134    checkpoint63i (2012/01/24)
135    o model/src:
136      - add factorized versions of some EOS code to find_rho.F,
137        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
138    o model/src:
139      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
140      - change default celsius2K from 273.16 to 273.15
141      - to keep results unchanged, add back old value of celsius2K in verification
142        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
143         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
144    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
145      to make TAF generate vectorizable code
146    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
147       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
148       have flags that do this more efficiently.
149    o pkg/diagnostics/diagstats_calc.F
150      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
151    o pkg/obcs (with exch2):
152      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
153        and remove code (in obcs_readparms.F) which was based on EXCH of indices
154        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
155    o pkg/exf and seaice exp:
156      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
157        so that switching off area & heff advection flags does not affect results.
158      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
159      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
160        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
161        results of verification experiments: 1D_ocean_ice_column(fwd),
162        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
163        and offline_exf_seaice (all 4).
164    o pkg/seaice:
165      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
166        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
167      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
168        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
169        not multi-dim advection;
170      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
171        SHORTWAVE_HEATING #undef.
172    o optim: make Makefile more robust (?)
173    o pkg/obcs:
174      * fix treatment of obcs_read_pickup for TAF
175    o pkg/shelfice:
176      * add missing initialisation of num_shifwflx
177      * new adjoint verification exp. for isomip
178      * change Prandtl and Schmidt numbers from generic formulations
179        (in terms of model diffus. and visc.) to separate runtime
180        parameters, with Holland and Jenkins (1999) default values.
181    o pkg/exf (interpolation):
182      - extended input field (2 rows) near the N & S poles:
183        * fill in with the symetric value (when even Nb of data in longitude)
184        * add average value at the poles only for scalar quantities ; for vector
185          component interpolation, skip the averaging and keep duplicated values,
186          unless the 2 components have same location (uvInterp=T) in which case
187          interpolate the 2 components together using S/R EXF_INTERP_UV.
188      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
189        together: this allows to account properly for local orientation when
190        averaging at N & S pole.
191      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
192        exf-interpolation near N & S poles. Undef by default.
193      - add debug check/print on 1rst iter if debugLevel >=2.
194    o pkg/exf:
195      - change masking flags definition (no longer "parameter"), put them in
196        common block and set them in S/R EXF_INIT_FIXED.
197      - change recognized masking flag from s,u,v to c,w,s since the mask
198        to use (maskC,W,S) depends on position on model grid and has little to
199        do with scalar/vector difference; fix masking if using P-coordinates.
200      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
201        and update results of exp. global_with_exf (x2).
202      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
203    o pkg/obcs
204      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
205    o pkg/exf (interpolation):
206      - assume periodicity in X only if input field cover full longitude range.
207      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
208        and should vectorise).
209      - fix input lat of the 2 added row (in case we provide N.pole data).
210    
211    checkpoint63h (2011/12/30)
212    o pkg/seaice:
213      - change declaration of UVM from _RL to _RS in order to get B-grid
214        uIce,vIce monitor when _RS = real*4
215    o pkg/offline:
216      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
217      - compute vertical velocity if not read from file (switch on exactConserv
218        & staggerTimeStep);
219      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
220    o verification:
221      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
222        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
223        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
224      - update output of exp. global_ocean.cs32x15.viscA4 after changing
225        grid-file angles (used here for coriolis-3d);
226      - remove (or gzip) few files not needed to run fizhi-cs experiments.
227    o pkg/exf (vector interpolation):
228      - rotate vector component toward local grid-axis orientation using grid-angles
229        (stored in GRID.h) instead of locally computed rotation angle; keep old code
230        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
231    o pkg/seaice:
232      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
233        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
234    o pkg/PKG_OPTIONS.h files:
235      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
236        outside of the #ifdef ALLOW_THISPKG / #endif block.
237      - update verification/*/code/PKG_OPTIONS.h files.
238    o add a verification experiment (offline_exf_seaice/input.seaice) that test
239      the B-grid LSOR solver
240    o pkg/seaice: sort out emissivity and long wave radiation step 2:
241      - add emissivity for snow and ice as new run-time parameters
242        (unfortunately) that default to the corresponding exf values; this
243        changes results in most verification experiments so that for backward
244        compatibility these parameter have to be set explicitly to inconsistent
245        values (ugly);
246      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
247        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
248        until we agree how to handle this bug properly
249    o pkg/exf (interpolation):
250      - add a set of run-time param ({inputfield}_interpMethod), one for
251        each interpolated input field, to select the interpolation method
252        with a value of zero switching off the interpolation;
253      - print interpolation parameters to standard output;
254      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
255        (to use instead runoff_interpMethod=0 in data.exf).
256      - simplify default setting of interpolation parameters (for all fields,
257        set position to match model grid cell-center position, leading to trivial
258        interpolation in case of regular Lat-Lon grid) and fix for the case of
259        non-uniform delY.
260    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
261       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
262       this factor is absolutely required, because the lw exitance (= out-going
263       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
264       where the reflectivity rho = 1-emissivity for conservation reasons. Once
265       this is established, we can remove the CPP-Flag (if we want to).
266    o pkg/seaice:
267      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
268        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
269      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
270        what the name implies (and not emissivity*BoltzmannConstant), this means
271        the old default value of 5.5e-8 now means
272        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
273        S/R exf_readparms
274      - FV-discretization of the B-grid LSOR solver, turn on with
275        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
276        of the calling routine dynsolver, so that B and C-grid code look a
277        little more alike.
278      - fix index bugs in ostres.F (B-grid code)
279    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
280    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
281      default for SEAICE_emissivity, if useEXF; requires setting a wrong
282      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
283      backward compatiblity
284    o model/src: use sigmaR in calc_ivdc
285    
286    checkpoint63g (2011/12/16)
287    o pkg/seaice/seaice_growth.F:
288      fix heat conservation of the coupled ocean-seaice system.
289      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
290      solid vs liquid water treatment is resolved via QNET.
291    o pkg/seaice/seaice_growth.F:
292      add missing term for sublimation in saltFlux, which was breaking conservation.
293    o pkg/seaice/seaice_model.F:
294      Remove this patholigical case treatment in evolution branch,
295      where it is un-necessary and breaks conservation.
296      Update global_ocean.cs32x15/results accordingly for
297      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
298    o model/src:
299      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
300      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
301    o pkg/obcs:
302      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
303      tendency for temperature and salinity that is then applied to update
304      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
305      horizontal advection and diffusion contributions on the boundary (in
306      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
307      removing the mask in S/R timestep_tracer. The advantage of this approach is
308      that the updated tracer values include contributions from the surface
309      forcing and vertical diffusion.
310      This modification changes exp4.stevens because of vertical diffusion.
311    o model/src:
312      change non-curvilinear grid setting to also work with exch2 + blank tiles:
313      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
314        face dimensions.
315      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
316        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
317        and INI_SPHERICAL_POLAR_GRID.
318      change test-experiment global_ocean.90x40x15:
319      - split the domain in many more tiles (9x4 tiles of 10x10 each);
320      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
321      - update results of both test (std & dwnslp).
322    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
323       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
324    o model/src:
325      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
326        and fix initialisation when using sigma-coords.
327    o model/src:
328     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
329       to their current value at the beginning of forward_step.F": add a new run-time
330       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
331     - set doResetHFactors=T in the following test exp:
332        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
333        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
334        and tutorial_global_oce_in_p (nonLinFS in p)
335    o pkg/ecco
336      - added IES cost term
337  o verification/advect_xz  o verification/advect_xz
338    - scale down the depth by 1/100 (from 200 km to just 2.km)    - scale down the depth by 1/100 (from 200 km to just 2.km)
339    - add secondary test using divergent flow, r-star and implicit vertical advection.    - add secondary test using divergent flow, r-star and implicit vertical advection.
340      - add note (check_conserve_TS.txt) and matlab script to check global
341        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
342  o pkg/rbcs:  o pkg/rbcs:
343    - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).    - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
344  o pkg/obcs (Stevens BCs):  o pkg/obcs (Stevens BCs):

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