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revision 1.2150 by jmc, Mon May 11 23:39:11 2015 UTC revision 1.2245 by mlosch, Fri Apr 22 09:11:45 2016 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      - add basal stress as parameterisation for grounding ice
9        following Lemieux et al. (2015)
10      - turn on by setting new parameter SEAICEbasalDragK2 to a value
11        larger than 0. Lemieux et al. (2015) recommend 15.
12      - The adjoint complains with extra recomputations so there is also a
13        new cpp-flag SEAICE_ALLOW_BOTTOMDRAG that is undefined by default in
14        order to postpone the problem
15      - compile the new code in lab_sea
16    o verification/halfpipe_streamice:
17      - update both TAF and OpenAD adm output (machine truncation differences)
18    
19    checkpoint65v (2016/04/08)
20    o verification/advect_xz:
21      - increase overlap size from 3 to 4 and add new secondary test for PQM
22        advection scheme (with mono & wino limiter).
23      - change main exp. to test PPM (with weno limiter) adv.scheme on Temp.
24    o model/src:
25      - new parameters "top_Pres" & "seaLev_Z" (replacing Ro_SeaLevel and recently
26        added phi0Ref) to set vertical axis origin and phiRef origin;
27        keep Ro_SeaLevel for backward compatibility (with a warning).
28       According to coordinate and fluid type:
29        OCN in Z: top_Pres(Ref) (=rhoConst*PhiRef(1)), seaLev_Z (=rF(1), @ the top)
30        ATM in Z: top_Pres(Ref) (=rhoConst*PhiRef(1)), seaLev_Z (=rF(Nr+1) @ bottom)
31        OCN in P: top_Pres (=rF(Nr+1)), seaLev_Z (= PhiRef(Nr+1)/g, @ the top)
32        ATM in P: top_Pres (=rF(Nr+1)), seaLev_Z (= PhiRef(1)/g, @ the bottom)
33      - remove Ro_SeaLevel from ATM experiment parameter files;
34      - in tutorial_global_oce_in_p, remove Ro_SeaLevel and set top_Pres to the
35        complement; update output.txt (changes at machine truncation level).
36    o pkg/seaice/seaice_evp.F
37      - simplify computation of deltaZ and zetaZ to simple averaging following
38        Bouillon et al. (2013). This removes a lot of code, but also changes
39        verification experiment lab_sea.hb87 -> updated
40    
41    checkpoint65u (2016/03/14)
42    o pkg/generic_advdiff:
43      - from Darren: add PPM and PQM advection schemes (number 40-42 and 50-52)
44        with 2 types of limiter (see: Engwirda & Kelley, submit. to JCP);
45        Note (from Darren): unlimited PPM/PQM scheme (40 & 50) are just for
46        testing and not for actual use.
47    o model/src:
48      - add parameter "phi0Ref" to specify reference [pressure/geo] potential at
49        origin r = rF(1);
50      - add options (parameter selectP_inEOS_Zc) to select which pressure to use
51        in EOS for height coordinate: enable to include NH Pressure or to use
52        more accurate pressure vertical profile; options not linked to EOS type
53        (as previously, e.g., JMD95P/JMD95Z) but set default according to EOS type;
54      - start to implement variable gravity (along vertical): for now, only with
55        z-coords (not even z*).
56      - add Ideal Gas equation of state for height coordinate.
57      - update OpenAD output (affected at machine truncation level) of exp:
58        global_ocean.90x40x15, OpenAD (std) and tutorial_global_oce_biogeo.
59    o pkg/exf:
60      - add ALLOW_EXF_OUTPUT_INTERP cpp switch to output the result
61        of exf interpolation (before any rescaling, rotation or interpolation
62        to velocity point) for each field that gets loaded from file. This option
63        identically mimics the input file organization (e.g. record numbers in year
64        by year input files) besides the change in horizontal grid.
65      - add rotateStressOnAgrid run-time switch so that wind stress fields
66        can be provided on the A-grid in zonal/meridional direction and
67        rotated on the fly. This only applies to the case when the exf
68        interpolation is off and rotateStressOnAgrid is false by default.
69    o model/src:
70      - rename internal parameter "useDynP_inEos_Zc" to "storePhiHyd4Phys" (since
71        it's also used with pkg/atm_phys) and add few more parameters (but still
72        inactive, src code yet to come)
73    
74    checkpoint65t (2016/02/10)
75    o pkg/atm_phys:
76      - from Ruth Geen: add optical depth dependence on CO2 concentration.
77    o model/src:
78      - fix vertical inter/extra-polation of density factor rhoFacF (for anelastic)
79        for the case setCenterDr=T (delRc set from "data"); add output of rhoFacC&F.
80        Update output of exp. deep_anelastic (changes at truncation level).
81    o tools:
82      - add a hack in "remove_comments_sed" (used only with TAF) for recent
83        version of OpenMPI (shipped with FC.23): comment out the new header
84        file "mpif-sizeof.h" which causes problems to TAF.
85    o pkg/seaice:
86      - change the termination criterion so that maxits (SEAICElinearIterMax)
87        has an effect
88      - unify iteration parameters for implicit solvers (JFNK and Picard)
89        SEAICEnonLinIterMax replaces SEAICEnewtonIterMax/NPSEUDOTIMESTEPS
90        SEAICElinearIterMax replaces SEAICEkrylovIterMax/SOLV_MAX_ITER
91        SEAICEpreLinIterMax replaces SOLV_MAX_ITER in preconditioner
92        SEAICEpreNL_IterMax replaces NPSEUDOTIMESTEPS in preconditioner
93        SEAICEnonLinTol     replaces JFNKgamma_nonlin
94      - remove S/R SEAICE_FGMRES_DRIVER and put content into S/R SEAICE_JFKN
95      - add new Picard-Krylov solver, compile with SEAICE_ALLOW_KRYLOV and
96        use with SEAICEuseKrylov
97    o pkg/seaice/seaice_lsr.F
98        fix small bug: replace zetaZ by zetaZloc in S/R seaice_lsr_rhsu/v; only
99        relevant if SEAICEuseStrImpCpl=T, and even then it does not seem to have
100        an effect.
101    o pkg/seaice: add two new parameters
102      - SEAICEuseLSR to simplify the logic in seaice_dynsolver (this
103        parameter is not in any namelist)
104      - SEAICEusrPicardAsPrecon to allow s/r seaice_lsr to be used as
105        a preconditioner for the non-linear Newton iteration of the JFNK
106        solver
107    o pkg/seaice/seaice_lsr.F: replace 1./SEAICE_deltaTdyn with recip_deltaT,
108      affects some experiments at truncation level:
109      - global_ocean.cs32x15.icedyn (11 digits),
110      - global_ocean.cs32x15.seaice (11 digits),
111      - seaice_itd (12 digits), seaice_itd.lipscomb07 (12 digits) -> update
112      - also update global_ocean.cs32x15 adjoint and tangent-linear results
113    o pkg/salt_plume & pkg/thsice:
114      - for coupled  set-up with pkg/thsice in ATM and pkg/salt_plume in OCN,
115        connect salt_plume flux to ATM-OCN coupling pkgs interface:
116       a) in ATM: also cumulate salt-plume flux in S/R THSICE_SALT_PLUME (for
117         export to coupler interface) even without compiling pkg/salt_plume ;
118       b) in OCN: apply coupler salt-plume flux to pkg/salt_plume field
119         (saltPlumeFlux) just before exch call, in S/R SALT_PLUME_DO_EXCH.
120    o pkg/dic:
121      - use the updated seaice fraction (from seaice pkgs) for DIC forcing
122        instead of the previous time-step value ; done in new S/R DIC_FIELDS_UPDATE
123        called from the top of dic_biotic_forcing.F (instead of in DIC_FIELDS_LOAD);
124      - move also update with values from ATM-OCN Coupler in the same new S/R
125        (previously done in ocn_apply_import.F).
126    o tools/adjoint_options:
127      - specify explicitly "-f77" or "-f90" in default ad-optfile since TAF (default)
128        has been changed on Jan 14, 2016.
129    o pkg/ggl90:
130      - add alternative discretisation of vertical shear (off by default), to
131        compute the mean (@ grid-cell center) of vertical shear compon instead of
132        vertical shear of mean flow (@ grid-cell center).
133      - add correct parenthesis in ALLOW_GGL90_SMOOTH code to get the same truncated
134        results on adjacent faces of cubed-sphere grids; this fix the restart.
135    o pkg/atm_compon_interf:
136      - skip time-ave over cpl_atmSendFrq of Sea-Level Pressure (atmSLPr) and just
137        pass last value, stored directly before export to CPL ;
138        Note: this affects results of Coupled set-up where OCN uses useImportSLP=T
139      - remove atmSLPr from pickup files (no longer needed for restart)
140    
141    checkpoint65s (2016/01/13)
142    o eesupp & genmake2:
143       - first check for Function ETIME and, if it fails, then check for subroutine
144         ETIME and consistent output; use the appropriate version in timers.F
145    o model/src:
146      - to check restart test, add option to apply EXCH to U,V earlier, just before
147        integr_continuity; turned off by default.
148    o pkg/dic:
149      - remove CPP option USE_ATMOSCO2 (not needed)
150    o tools/tst_2+2:
151      - try to ignore difference between +0 and -0 in binary file, causing test
152        to fail for no good reason.
153    o eesupp & genmake2:
154      - put back modif from Jinxuan Zhu - change etime fct call to S/R call -
155        but also check (in genmake2) that test runs and returns meaningful results.
156    o coupler pkgs:
157      Finish implementation of optionally-exchanged variable switches (started on
158       Nov 12) with addition of few more exchanged fields, including 2-way exchange
159       of pkg/thsice vars to allow to use seaice dynamics (from pkg/seaice) & seaice
160       advection in OCN component; this requires sequential coupling.
161      coupler (pkg/atm_ocn_coupler):
162      - add argument msgUnit and iter number to CPL_SEND/RECV_ATM/OCN_FIELDS
163        routines (useful for debug).
164      - only export/import optionally exchanged fields (RunOff, seaice, Salt-Plume
165         flux, DIC fields) if corresponding switch is ON.
166      - add option to export RunOff to OCN (to use for DIC river input)
167      - add 2-way thSIce vars exchange; check for consistent cpl_sequential setting.
168      components (pkg/atm_ & ocn_compon_interf):
169      - to save memory space in ATM & OCN comp: add some #ifdef ALLOW_${PKG} around
170        optionally exchanged fields; add a check & stop in cpl_readparms.F.
171        ATMCPL.h: ALLOW_LAND for RunOff, ALLOW_THSICE for seaice, ALLOW_AIM for CO2;
172        OCNCPL.h: ALLOW_SALT_PLUME, ALLOW_DIC for DIC, ALLOW_THSICE for 2-W thsice.
173      - rename:   fracIce     -> sIceFrac_cpl (<- match coupler var name)
174        + in ATM: fracIceTime -> sIceFracTime ; seaIceTime -> sIceMassTime.
175      - add 2-way thSIce vars exchange ; add Salt-Plume flux ; add RunOff in OCN.
176      - hold in common block coupler optionally-exchanged variable switch
177        and set default "useImportXXX" accordingly; + check & stop if inconsistent.
178      - add diagnostics for all imported fields from coupler (in both OCN & ATM);
179        this is intended to replace the OCN cplFldtave.* output files (not updated
180        to contain new additional exchanged fields).
181    o pkg/dic:
182      - fix an other bug (also from 2014/08/30) in dic_atmos.F, in dic_int1=3 code.
183    o pkg/thsice:
184      - when coupled to ATM (useCoupler) with thSIce_skipThermo=T, skip reading
185        and writing of thsice pickup files.
186    o pkg/atm_compon_interf:
187      - move all field individual export-call out of cpl_export_import_data.F
188        into new S/R ATM_EXPORT_FIELDS
189    o pkg/atm_compon_interf:
190      - store state variables (for now, only thSIce fields) just before beeing
191        exported (in cpl_export_import_data.F, like on ocean side) instead of from
192        atm_store_my_data.F like all exported fluxes.
193      - new version of pickup_cpl: write field names into meta file and read meta
194        file to find field postion in pickup. Also only write/read fields meeded for
195        restart (same logic as main pickup file ; also using pickupStrictlyMatch)
196    o pkg/dic:
197      - fix bug (added on 2014/08/30) in dic_atmos.F for the case dic_int1= 2 or 3.
198    o pkg/seaice: add new parameter SEAICEpressReplFac to choose between
199        pressure replacement method (=1., default) or original Hibler (1979) (=0.)
200        value can be from domain [0,1] to average between the two methods
201    o pkg/atm_phys:
202      - allow to provide 2-d map of albedo and mixed-layer depth from files (but
203        hold fixed in time).
204    
205    checkpoint65r (2015/12/21)
206    o pkg/seaice:
207        fix bug in tridiagonal solvers for SEAICE_OLx/y>0, this affects the JFNK
208        solver (offline.dyn_jfnk) and global_ocean.cs32x15.seaice -> updated
209    o pkg/seaice:
210      - fix a bug in computing areaS in (J-J -> J-1) that affects runs
211        when SEAICEscaleSurfStress=.TRUE.,
212      - apply areaW and areaS in S/R seaice_calc_lhs
213    o pkg/atm_phys:
214      - add diagnostics for 3-D, Nr+1 levels diagnostics of radiative fluxes
215        (shortwave & longwave, net & downward) and diagnostics of temp. tendency
216        for individual contribution (convection, LSC cond, radiation)
217      - add Ruth Geen etal, GRL 2016, radiation optionis (see paper supp.
218        information); activated with: solar_exponent=0. and wv_exponent=-1.
219    o pkg/ggl90:
220      - within IDEMIX add upper limit for horizontal group velocity to
221        avoid instability problems in the explicit horizontal diffusion term for
222        long time steps or high resolution
223    o pkg/diagnostics:
224      - simplify setting of local-array size in diagstats_output.F: uses "numLevels"
225        (from DIAGNOSTICS_SIZE.h) to allow to write out more than Nr levels.
226    o testreport:
227      - remove "-v" (verbose option) in default mpirun command.
228    o pkg/seaice/seaice_growth:
229      - catch potential division by zero in ITD code, does not change
230        verification results
231    o pkg/ecco:
232      - retire old codes to the Attic. The calls to retired functions are
233        left in a commented form in case they ever need to be re-activated.
234      - ecco_check.F: issue warning if any old CPP option is
235        defined that corresponds to retired codes -- then stop.
236    o pkg/atm_compon_interf:
237      - change seaice fraction (use for OCN dic surf.flux) stored and sent to
238        coupler: use last time-step value instead of average over cplSendFrq_iter
239        time-step, similar to what is done for seaIceMass.
240        This will affect results (pkg/dic) of coupled ATM-OCN+dic set-up.
241    o eesupp & genmake2:
242      - from Jinxuan Zhu: change etime fct call to S/R call (fix gfortran ETIME);
243        <= remove until a fix is found for some ifort version on ia32 machine.
244    o pkg/seaice/seaice_evp:
245      - refine residual computation
246    
247    checkpoint65q (2015/11/18)
248    o pkg/seaice/seaice_evp:
249      - fix residual computations so that they no longer affect the actual
250        simulation code
251      - fix seaice_readparams to be able to actually set new parameters
252        SEAICEaEVPcStar and SEAICEaEVPalphaMin, also fix logic a little
253    o model/src:
254      - fix wrong truncation (single prec) from "FLOAT" function in expressions
255        like: deltaT*FLOAT(myIter) when myIter is large:
256         a) replaced by DFLOAT (if not seen by TAF);
257         b) remove "FLOAT" and use implicit type conversion (if seen by TAF).
258    o pkg/aim_v23:
259      - write/read the expected CO2 pickups (from S/R AIM_DO_CO2): fix reading
260        when pickupSuff is set ; do write rolling pickups + at the end of the run.
261    o pkg/atm_ocn_coupler + ocn_compon_interf:
262      - in prep for using pkg/seaice Dyn in coupled set-up, implement sequential
263        coupling option-1: ATM -(cpl)-> OCN and then OCN -(cpl)-> ATM ;
264        add corresponding call in DO_OCEANIC_PHYS.
265    o coupler pkgs:
266      Start a new way to set-up optionally-exchanged variables (previously, only
267       there for exchange_DIC): switch on/off from 1 place, at run-time, in coupler
268       data.cpl (new) instead of at compile time in ATMIDS.h & OCNIDS.h ;
269       send switch to ATM & OCN compon before reading their own "data.cpl" (so that
270       compononent param default can be set accordingly).
271      Note: this new switch (cpl_exchange_[xxx]) is not a per variable switch
272       but rather applies to a group a fields (going both ways like for DIC)
273       and corresponds to an option of coupling config.
274      coupler (pkg/atm_ocn_coupler):
275      - change parameter file from "data" to "data.cpl" (in cpl_read_params.F),
276        and read namelist directly (without eessup S/R calls) instead of
277        in the very un-flexible old way, 1 param per line, in fixed order;
278      - add error-counter to track errors (e.g., missing "data.cpl") and to stop
279        cleanly in CPL_CHECK_CPLCONFIG
280      - add new coupling-exchange selectors (some not yet active) including
281        cpl_exchange_DIC (to set to 3 to replace atmCpl_exchange_DIC=T in ATMIDS.h
282                                             and ocnCpl_exchange_DIC=T in OCNIDS.h);
283      - add 2 new S/R (CPL_SEND_ATM/OCN_CPLPARMS) to send coupler-params to each
284        component ; called directly from coupler.F, after comp. registrations;
285      - rename few variable-ID names (in ATMIDS.h & OCNIDS.h):
286         atm/ocnSeaIceName --> atm/ocnSIceMassName ; atm/ocnFCO2Name ->
287          -> atm/ocnCO2FluxName ; atm/ocnWSpdName --> atm/ocnWindSpdName
288      components (pkg/atm_ & ocn_compon_interf):
289      - add ATM/OCN_CPL_OPTIONS.h in component pkgs and include the corresponding
290        CPP header file in all pkg source files.
291      - move checking of comp. configs out of cpl_exch_configs.F into new S/R
292        ATM/OCN_CHECK_CPLCONFIG;
293      - add error-counter to track errors (e.g., in "data.cpl") and to stop
294        cleanly in ATM/OCN_CHECK_CPLCONFIG;
295      - add new S/R CPL_IMPORT_CPLPARMS to import coupling-exchange selectors
296        from coupler ; called from initialise_fixed.F, after PACKAGES_BOOT and
297        before PACKAGES_READPARMS;
298      verification/cpl_aim+ocn/:
299      - update ATMIDS.h & OCNIDS.h (in shared_code) and use new parameter file
300        "data.cpl" for coupler (in input_cpl).
301    o eesupp/inc:
302      - change the MPI-global-sum default (in CPP_EEOPTIONS.h) to:
303        #define GLOBAL_SUM_ORDER_TILES (only affects MPI built of global_sum_tile.F)
304        to always cumulate tile local-sum in the same order (still uses
305        MPI_Allreduce like standard code).
306      - in verification experiment code, remove local CPP_EEOPTIONS.h_mpi files
307        that are now identical to standard version (in eesupp/inc).
308    o pkg/shelfice:
309      - add SHELFICETransCoeffTFile for initializing spatially varying
310        heat and salt transfer coefficients
311    o pkg/atm_compon_interf & ocn_compon_interf:
312      - combine into 1 (new) S/R CPL_EXPORT_IMPORT_DATA the two previous
313        S/R CPL_EXPORT_MY_DATA & CPL_IMPORT_EXTERNAL_DATA
314      - move bi,bj loops inside S/R OCN_STORE_MY_DATA
315    o pkg/atm_ocn_coupler:
316      - initialise to zero ATMVARS.h & OCNVARS.h arrays.
317    o pkg/rbcs:
318      - select RBCS-mask for Temp & Salt the same way as for pTracer ; this allows
319        to compile with maskLEN=1 when all tracers use the same RBCS-mask.
320      - add a short report (to STDOUT) about RBCS-mask settings.
321    
322    checkpoint65p (2015/10/23)
323    o pkg/seaice/seaice_evp.F: fix store directives and key computations, since
324        there is no adjoint test for EVP, we don't know what it does to the adjoint
325        solution, but at least there are no more recomputation warnings left
326    o pkg/seaice/seaice_evp.F: slight modification of averaging so that EVP stands
327        a chance of giving the same results as a fully converged VP (JFNK) solver
328    o tools/adjoint_options/adjoint_diva:
329      - fix bug (typo) in Tang-Linear FLAGS setting for MPI + DIVA
330    o pkg/streamice:
331      - spotted bug in streamice_driving_stress using dyG where should have been dxG
332    o pkg/exf:
333      - remove STOP statement that prevented to use wind or (wind-)stress
334        interpolation for constant-in-time forcing fields (wind/stress period = 0).
335    o pkg/seaice:
336      - replace SEAICE_EVP_USE_ADAPTATION by run time parameters, requires
337        5 additionals 2D fields and 6 new store directives
338      - change logic in seaice_readparms.F: EVP code can now be turned on in
339        various ways, setting SEAICE_deltaTev is no longer required,
340        alternatively set SEAICE_evpAlpha/Beta, SEAICEuseEVPstar, SEAICEuseEVPrev,
341        or SEAICEaEVPcoeff
342    o pkg/shelfice/shelfice_thermodynamics.F
343      - redefining uLoc/vLoc to u/v, instead of 2u/v
344    o pkg/seaice/seaice_evp.F: introduce "adaptive EVP" by Madlen Kimmritz
345      - this is an intermediate state of a truely converging EVP that has
346        the potential of outperforming implicit VP methods, I do not recommend
347        using it yet.
348      - for now, "adaptive EVP" is turned on by setting SEAICE_EVP_USE_ADAPTATION
349        and all parameters are hardwired
350      - for convergence it still requires very smooth regularisations, that means,
351        if SEAICE_DELTA_SMOOTHREG is defined, deltaCreg=deltaC+deltaMin, which is
352        different from the VP case with deltaCreg=sqrt(deltaC**2+deltaMin**2); also
353        specific averaging appears to be required, still subject to tuning
354      - still needs cleaning and I need to turn parameter into runtime parameters
355      - add code to compute and print residuals of iteration, compile with
356        defining ALLOW_SEAICE_EVP_RESIDUAL to enable it
357    o pkg/seaice/seaice_evp.F: fix a bug (factor of four in front of e12Csq)
358      that entered with r1.54 on Sep04, 2015, -> update results
359    
360    checkpoint65o (2015/09/14)
361    o pkg/mom_vecinv & mom_common:
362      - add deep-atmosphere geometry factor in mom_calc_visc.F + in routines
363        called from there.
364      - add anelastic and deep-atmosphere geometry factor in pkg/mom_vecinv ; this
365        allows to use Vector-Invariant form in deep atmos and anelastic formulation
366    o pkg/seaice: introduce fast ice parameterisation following Itkin et al. (2015)
367      and Koenig-Beatty+Holland (2012)
368      - two new parameters SEAICE_tensilFac and SEAICE_tensilDepth
369      - global 2D field tensileStrength, computed in seaice_calc_ice_strength
370      - requires an extra input argument for S/R seaice_calc_viscosities
371      - tensileStrength's depth dependence is different from Itkin et al. (2015)
372        (to be changed and played with, for now exponential)
373    o pkg/seaice: introduce new parameter SEAICEscaleSurfStress (default = .FALSE.)
374      - if TRUE scale ice-ocean and ice-atmosphere stress acting on sea ice
375        by AREA according to Connelly et al. (2004), JPO.
376      - For EVP and the LSR solver, the implicit part of the drag term is
377        the only non-zero term in the denominator when there is no ice (which
378        prevented running the model with zero ice-ocean drag). If
379        SEAICEscaleSurfStress = .TRUE., this results in a division by zero
380        (or zero main diagonals BU/BV) which need to be caught. A practical
381        consequence is that for open water, the momentum equation reduce
382        to trivially 0 = 0 + 0 (for EVP). For LSR, BU/BV are reset to 1, if
383        they happen to be zero, often leading to a non-zero solution over
384        open water.
385    o pkg/seaice: revise EVP code (seaice_evp.F) in preparation for a more
386        efficient EVP method.
387      - introduce area-weighted averages for e12 (analogously to
388        seaice_calc_viscosities.F); this totally changes lab_sea.hb87 (2 digits
389        remain, but also changing the order of terms in the previous average
390        changed the results as much) -> update experiment
391      - add SEAICE_DELTA_SMOOTHREG code
392      - disentangle computation of zetaC/deltaC and zetaZ/deltaZ, also for
393        TEM-code
394      - adjust loop bounds so that only required fields are computed
395      - add new averaging code for zetaZ/deltaZ (again similar to
396        seaice_calc_viscosities.F), inactive by default for now (will change
397        results again), but will replace old code eventually
398    o eesupp/src:
399      - add an other alternative for multi-proc GLOBAL_SUM (in global_sum_tile.F)
400        to always cumulate tile local-sum in the same order
401        (option #define GLOBAL_SUM_ORDER_TILES in CPP_EEOPTIONS.h).
402        Still uses MPI_Allreduce (like standard code) but on array of tiles
403        and should be faster than GLOBAL_SUM_SEND_RECV code.
404      - switch almost all verification experiments that use GLOBAL_SUM_SEND_RECV
405        (defined in CPP_EEOPTIONS.h_mpi) to GLOBAL_SUM_ORDER_TILES instead.
406      - add CPP_EEOPTIONS.h_mpi with GLOBAL_SUM_ORDER_TILES defined in 14 more exp.:
407         aim.5l_cs, cheapAML_box, deep_anelastic, dome, fizhi-cs-32x32x40,
408         fizhi-cs-aqualev20, fizhi-gridalt-hs, global_ocean_ebm, matrix_example,
409         natl_box, solid-body.cs-32x32x1, tutorial_advection_in_gyre,
410         tutorial_baroclinic_gyre and tutorial_held_suarez_cs.
411    
412    checkpoint65n (2015/07/29)
413    o pkg/thsice:
414      - add a warning when used with pkg/aim but without updating SST
415        (stepFwd_oceMxL=F & useCoupler=F & tauRelax_MxL<>-1 ).
416    o pkg/offline:
417      - change where Offline-Fields are loaded, from load_fields_driver.F to
418        directly within FORWARD_STEP, just after updating iter number and time;
419      - move setting of GM and KPP diffusivity out of OFFLINE_FIELDS_LOAD into new
420        S/R OFFLINE_GET_DIFFUS that is called towards the end of DO_OCEANIC_PHYS;
421       These changes allow:
422        a) to recover exactly on-line results using deltaToffline=deltaTClock,
423        tested (using offlineIter0= nIter0 -1 and offlineTimeOffset= -deltaT/2)
424        both with Lin & Non-Lin Free-Surf, both with staggerTimeStep & synchronous
425        time-step, both with GM & KPP files and with recomputing these fields;
426        b) no needs to switch on staggerTimeStep anymore;
427        c) simplify rescaling of offline horiz. velocity with Non-Lin Free-Surf.
428      - update output of experiment tutorial_dic_adjoffline (only 3 digits left).
429    o pkg/offline:
430      - change (rarely used) offset-iteration parameter to an offset time (in s):
431        can easily recover previous offset-iter effect by setting offset-time
432        (offlineTimeOffset) to offset-iter x deltaToffline;
433      - do not turn-off Temp & Salinity surface relaxation when using KPP (used
434        in KPP as part of surface buoyancy forcing) in offline run.
435      - fix ptracers KPP non-local term in the case where KPP is re-computed.
436    o OpenAD
437      - Adding preliminary ggl90 test to OpenAD verification.
438        Config. with ggl90 currently diverges after 64 time steps
439        so will need more work to become more stable
440      - Adding preliminary kpp test to OpenAD verification.
441        required small tweakes in kpp_routines.F
442      - Merge and update from Krishna Narayanan's contrib area:
443        * Add one variable for preliminary OpenAD DIVA
444        * Add replacement time-stepping for OpenAD DIVA
445        * genmake2 flag -diva (but only for OpenAD; preliminary)
446        * required modifs for OAD_support
447        successful preliminary test for tutorial_global_oce_biogeo/
448    o pkg/seaice:
449      - initialise deltaC in seaice_lsr, cosmetic changes in seaice_lsr
450      - add cpp-flag SEAICE_DELTA_SMOOTHREG for option of regularising
451        delta with a smooth function in s/r seaice_calc_viscosity
452        (no effect on EVP)
453      - rename local suffix "sqr" into "sq" for more consistent variable names
454    o pkg/seaice:
455        add new parameter SEAICE_deltaMin that is used ***only***
456        for regularizing Delta (and nothing else, like the parameter
457        which is also used for all sorts of things SEAICE_EPS).
458        Defaults to SEAICE_EPS for backward compatibility only.
459    o pkg/seaice: replace erroneously storing e12Csqr on the wrong tape with
460        the wrong key by inialising it before use -> fixes a recomputation
461        problem but does not fix the gradient
462    o pkg/layers:
463      - move resetting of flux arrays to outside the iLa loop
464        (this caused layers_diapycnal to not work with more than one layer coord.)
465      - fix bug in calculation of layers_recip_delta in layers_init_fixed.F
466    o pkg/layers:
467      - remove from common block 3D layers fields (used to diagnose transport
468        in tracer coords) and declare them as local arrays in layers_calc.F
469    o pkg/seaice:
470      - Rename SEAICE_VECTORIZE_LSR_ZEBRA to SEAICE_LSR_ZEBRA and define it
471        in lab_sea forward experiment (changes results -> updated)
472      - update adjoint experiment lab_sea after cleaning up seaice_lsr_tridiagu/v
473    o pkg/seaice: modify seaice_lsr.F in order to improve the gradient
474       computations; for SEAICE_VECTORIZE_LSR
475      - move the loops over which the tridiagonal solvers (seaice_lsr_tridiagu/v)
476        sweep to the outside,
477      - remove store directives and add "CADJ loop sequential" directives
478        in analogy to model/src/solve_tridiagonal.F
479      - replace many "#ifdef SEAICE_VECTORIZE_LSR_ZEBRA" by variable loop
480        boundaries to yield more readable code. This has also the charming side
481        effect that your can use SEAICE_VECTORIZE_LSR_ZEBRA without
482        SEAICE_VECTORIZE_LSR (i.e. adjoint without recomputations in
483        seaice_lsr_tridiagu/v now requires either of these flags, vectorization
484        still requires SEAICE_VECTORIZE_LSR with SEAICE_VECTORIZE_LSR_ZEBRA as
485        an additional option)
486       The tridiagonal solvers are now completely analoguous to solve_tridiagonal.F
487       but the adjoint gradients (which are affected by this change) still explode.
488    o coupler (atm & ocn _compon_interf):
489      - avoid using Exch2 IO mapping if not suitable.
490    
491    checkpoint65m (2015/06/15)
492    o pkg/layers:
493      - clean-up old parameters setting (from Sep 2012):
494        + remove old parameters setting from common block (declared locally);
495        + stop if any old parameter is mixed with new parameters;
496        + check for valid or consistent parameter setting (e.g., layers_name)
497      - check that layers_bounds for Pot.Density are in the right range;
498        this is supposed to catch un-updated setting after recently shifting
499        potential density field "prho" by -1000 (now in "sigma" scale).
500    o pkg/layers:
501      - Added missing call to layers_fill for keeping track of tottend in
502        pkg/diagnostics/diagnostics_fill_state.F
503    o pkg/layers:
504      - added CPP flux LAYERS_FINEGRID_DIAPYCNAL to disable fine-grid binning
505        of diapycnal fluxes
506    o pkg/layers:
507      - reverted changes to interpolation to previous treatment; there
508        was never actually a problem
509    o pkg/layers:
510      - fix interpolation of layers tracers in the presence of partial cells
511      - add lots of new functionality to compute water mass transformation
512        (enabled by CPP flag LAYERS_THERMODYNAMICS)
513      - add new calls from main code (diags_oceanic_surf_flux.F,
514        thermodynamics.F, impldiff.F) and gad to save the necessary fields
515        for layers_thermodynamics calculations
516    o pkg/ptracers:
517      - add capability of stepping a passive tracer forward without advection
518        by setting PTRACERS_advScheme to 0.
519    o pkg/diagnostics:
520      - add few (threads) _BARRIER around any update of "diag_pkgStatus".
521    o pkg/layers:
522      - shift potential density field "prho" by -1000 for density layer averaging so
523        that it corresponds to usual "sigma" definition (i.e., rho(p=const)-1000);
524        Note that density bin boundaries (layers_bounds in data.layers) have
525        to be set accordingly (i.e., shifted, in sigma scale).
526  o pkg/layers:  o pkg/layers:
527    - fix snap-shot output of layer thickness @ V.pt and output of pot.density    - fix snap-shot output of layer thickness @ V.pt and output of pot.density
528    - fix calculation of layer non-weighted velocity and layer probability    - fix calculation of layer non-weighted velocity and layer probability

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