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revision 1.2150 by jmc, Mon May 11 23:39:11 2015 UTC revision 1.2247 by jmc, Wed Apr 27 22:12:20 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 model/src:
8      - fix missing dPhiNH in pressure_for_eos.F (case: selectP_inEOS_Zc=3)
9    o pkg/seaice:
10      - add missing checks for SEAICE_ALLOW_KRYLOV and SEAICE_ALLOW_BOTTOMDRAG
11    o pkg/seaice:
12      - add basal stress as parameterisation for grounding ice
13        following Lemieux et al. (2015)
14      - turn on by setting new parameter SEAICEbasalDragK2 to a value
15        larger than 0. Lemieux et al. (2015) recommend 15.
16      - The adjoint complains with extra recomputations so there is also a
17        new cpp-flag SEAICE_ALLOW_BOTTOMDRAG that is undefined by default in
18        order to postpone the problem
19      - compile the new code in lab_sea
20    o verification/halfpipe_streamice:
21      - update both TAF and OpenAD adm output (machine truncation differences)
22    
23    checkpoint65v (2016/04/08)
24    o verification/advect_xz:
25      - increase overlap size from 3 to 4 and add new secondary test for PQM
26        advection scheme (with mono & wino limiter).
27      - change main exp. to test PPM (with weno limiter) adv.scheme on Temp.
28    o model/src:
29      - new parameters "top_Pres" & "seaLev_Z" (replacing Ro_SeaLevel and recently
30        added phi0Ref) to set vertical axis origin and phiRef origin;
31        keep Ro_SeaLevel for backward compatibility (with a warning).
32       According to coordinate and fluid type:
33        OCN in Z: top_Pres(Ref) (=rhoConst*PhiRef(1)), seaLev_Z (=rF(1), @ the top)
34        ATM in Z: top_Pres(Ref) (=rhoConst*PhiRef(1)), seaLev_Z (=rF(Nr+1) @ bottom)
35        OCN in P: top_Pres (=rF(Nr+1)), seaLev_Z (= PhiRef(Nr+1)/g, @ the top)
36        ATM in P: top_Pres (=rF(Nr+1)), seaLev_Z (= PhiRef(1)/g, @ the bottom)
37      - remove Ro_SeaLevel from ATM experiment parameter files;
38      - in tutorial_global_oce_in_p, remove Ro_SeaLevel and set top_Pres to the
39        complement; update output.txt (changes at machine truncation level).
40    o pkg/seaice/seaice_evp.F
41      - simplify computation of deltaZ and zetaZ to simple averaging following
42        Bouillon et al. (2013). This removes a lot of code, but also changes
43        verification experiment lab_sea.hb87 -> updated
44    
45    checkpoint65u (2016/03/14)
46    o pkg/generic_advdiff:
47      - from Darren: add PPM and PQM advection schemes (number 40-42 and 50-52)
48        with 2 types of limiter (see: Engwirda & Kelley, submit. to JCP);
49        Note (from Darren): unlimited PPM/PQM scheme (40 & 50) are just for
50        testing and not for actual use.
51    o model/src:
52      - add parameter "phi0Ref" to specify reference [pressure/geo] potential at
53        origin r = rF(1);
54      - add options (parameter selectP_inEOS_Zc) to select which pressure to use
55        in EOS for height coordinate: enable to include NH Pressure or to use
56        more accurate pressure vertical profile; options not linked to EOS type
57        (as previously, e.g., JMD95P/JMD95Z) but set default according to EOS type;
58      - start to implement variable gravity (along vertical): for now, only with
59        z-coords (not even z*).
60      - add Ideal Gas equation of state for height coordinate.
61      - update OpenAD output (affected at machine truncation level) of exp:
62        global_ocean.90x40x15, OpenAD (std) and tutorial_global_oce_biogeo.
63    o pkg/exf:
64      - add ALLOW_EXF_OUTPUT_INTERP cpp switch to output the result
65        of exf interpolation (before any rescaling, rotation or interpolation
66        to velocity point) for each field that gets loaded from file. This option
67        identically mimics the input file organization (e.g. record numbers in year
68        by year input files) besides the change in horizontal grid.
69      - add rotateStressOnAgrid run-time switch so that wind stress fields
70        can be provided on the A-grid in zonal/meridional direction and
71        rotated on the fly. This only applies to the case when the exf
72        interpolation is off and rotateStressOnAgrid is false by default.
73    o model/src:
74      - rename internal parameter "useDynP_inEos_Zc" to "storePhiHyd4Phys" (since
75        it's also used with pkg/atm_phys) and add few more parameters (but still
76        inactive, src code yet to come)
77    
78    checkpoint65t (2016/02/10)
79    o pkg/atm_phys:
80      - from Ruth Geen: add optical depth dependence on CO2 concentration.
81    o model/src:
82      - fix vertical inter/extra-polation of density factor rhoFacF (for anelastic)
83        for the case setCenterDr=T (delRc set from "data"); add output of rhoFacC&F.
84        Update output of exp. deep_anelastic (changes at truncation level).
85    o tools:
86      - add a hack in "remove_comments_sed" (used only with TAF) for recent
87        version of OpenMPI (shipped with FC.23): comment out the new header
88        file "mpif-sizeof.h" which causes problems to TAF.
89    o pkg/seaice:
90      - change the termination criterion so that maxits (SEAICElinearIterMax)
91        has an effect
92      - unify iteration parameters for implicit solvers (JFNK and Picard)
93        SEAICEnonLinIterMax replaces SEAICEnewtonIterMax/NPSEUDOTIMESTEPS
94        SEAICElinearIterMax replaces SEAICEkrylovIterMax/SOLV_MAX_ITER
95        SEAICEpreLinIterMax replaces SOLV_MAX_ITER in preconditioner
96        SEAICEpreNL_IterMax replaces NPSEUDOTIMESTEPS in preconditioner
97        SEAICEnonLinTol     replaces JFNKgamma_nonlin
98      - remove S/R SEAICE_FGMRES_DRIVER and put content into S/R SEAICE_JFKN
99      - add new Picard-Krylov solver, compile with SEAICE_ALLOW_KRYLOV and
100        use with SEAICEuseKrylov
101    o pkg/seaice/seaice_lsr.F
102        fix small bug: replace zetaZ by zetaZloc in S/R seaice_lsr_rhsu/v; only
103        relevant if SEAICEuseStrImpCpl=T, and even then it does not seem to have
104        an effect.
105    o pkg/seaice: add two new parameters
106      - SEAICEuseLSR to simplify the logic in seaice_dynsolver (this
107        parameter is not in any namelist)
108      - SEAICEusrPicardAsPrecon to allow s/r seaice_lsr to be used as
109        a preconditioner for the non-linear Newton iteration of the JFNK
110        solver
111    o pkg/seaice/seaice_lsr.F: replace 1./SEAICE_deltaTdyn with recip_deltaT,
112      affects some experiments at truncation level:
113      - global_ocean.cs32x15.icedyn (11 digits),
114      - global_ocean.cs32x15.seaice (11 digits),
115      - seaice_itd (12 digits), seaice_itd.lipscomb07 (12 digits) -> update
116      - also update global_ocean.cs32x15 adjoint and tangent-linear results
117    o pkg/salt_plume & pkg/thsice:
118      - for coupled  set-up with pkg/thsice in ATM and pkg/salt_plume in OCN,
119        connect salt_plume flux to ATM-OCN coupling pkgs interface:
120       a) in ATM: also cumulate salt-plume flux in S/R THSICE_SALT_PLUME (for
121         export to coupler interface) even without compiling pkg/salt_plume ;
122       b) in OCN: apply coupler salt-plume flux to pkg/salt_plume field
123         (saltPlumeFlux) just before exch call, in S/R SALT_PLUME_DO_EXCH.
124    o pkg/dic:
125      - use the updated seaice fraction (from seaice pkgs) for DIC forcing
126        instead of the previous time-step value ; done in new S/R DIC_FIELDS_UPDATE
127        called from the top of dic_biotic_forcing.F (instead of in DIC_FIELDS_LOAD);
128      - move also update with values from ATM-OCN Coupler in the same new S/R
129        (previously done in ocn_apply_import.F).
130    o tools/adjoint_options:
131      - specify explicitly "-f77" or "-f90" in default ad-optfile since TAF (default)
132        has been changed on Jan 14, 2016.
133    o pkg/ggl90:
134      - add alternative discretisation of vertical shear (off by default), to
135        compute the mean (@ grid-cell center) of vertical shear compon instead of
136        vertical shear of mean flow (@ grid-cell center).
137      - add correct parenthesis in ALLOW_GGL90_SMOOTH code to get the same truncated
138        results on adjacent faces of cubed-sphere grids; this fix the restart.
139    o pkg/atm_compon_interf:
140      - skip time-ave over cpl_atmSendFrq of Sea-Level Pressure (atmSLPr) and just
141        pass last value, stored directly before export to CPL ;
142        Note: this affects results of Coupled set-up where OCN uses useImportSLP=T
143      - remove atmSLPr from pickup files (no longer needed for restart)
144    
145    checkpoint65s (2016/01/13)
146    o eesupp & genmake2:
147       - first check for Function ETIME and, if it fails, then check for subroutine
148         ETIME and consistent output; use the appropriate version in timers.F
149    o model/src:
150      - to check restart test, add option to apply EXCH to U,V earlier, just before
151        integr_continuity; turned off by default.
152    o pkg/dic:
153      - remove CPP option USE_ATMOSCO2 (not needed)
154    o tools/tst_2+2:
155      - try to ignore difference between +0 and -0 in binary file, causing test
156        to fail for no good reason.
157    o eesupp & genmake2:
158      - put back modif from Jinxuan Zhu - change etime fct call to S/R call -
159        but also check (in genmake2) that test runs and returns meaningful results.
160    o coupler pkgs:
161      Finish implementation of optionally-exchanged variable switches (started on
162       Nov 12) with addition of few more exchanged fields, including 2-way exchange
163       of pkg/thsice vars to allow to use seaice dynamics (from pkg/seaice) & seaice
164       advection in OCN component; this requires sequential coupling.
165      coupler (pkg/atm_ocn_coupler):
166      - add argument msgUnit and iter number to CPL_SEND/RECV_ATM/OCN_FIELDS
167        routines (useful for debug).
168      - only export/import optionally exchanged fields (RunOff, seaice, Salt-Plume
169         flux, DIC fields) if corresponding switch is ON.
170      - add option to export RunOff to OCN (to use for DIC river input)
171      - add 2-way thSIce vars exchange; check for consistent cpl_sequential setting.
172      components (pkg/atm_ & ocn_compon_interf):
173      - to save memory space in ATM & OCN comp: add some #ifdef ALLOW_${PKG} around
174        optionally exchanged fields; add a check & stop in cpl_readparms.F.
175        ATMCPL.h: ALLOW_LAND for RunOff, ALLOW_THSICE for seaice, ALLOW_AIM for CO2;
176        OCNCPL.h: ALLOW_SALT_PLUME, ALLOW_DIC for DIC, ALLOW_THSICE for 2-W thsice.
177      - rename:   fracIce     -> sIceFrac_cpl (<- match coupler var name)
178        + in ATM: fracIceTime -> sIceFracTime ; seaIceTime -> sIceMassTime.
179      - add 2-way thSIce vars exchange ; add Salt-Plume flux ; add RunOff in OCN.
180      - hold in common block coupler optionally-exchanged variable switch
181        and set default "useImportXXX" accordingly; + check & stop if inconsistent.
182      - add diagnostics for all imported fields from coupler (in both OCN & ATM);
183        this is intended to replace the OCN cplFldtave.* output files (not updated
184        to contain new additional exchanged fields).
185    o pkg/dic:
186      - fix an other bug (also from 2014/08/30) in dic_atmos.F, in dic_int1=3 code.
187    o pkg/thsice:
188      - when coupled to ATM (useCoupler) with thSIce_skipThermo=T, skip reading
189        and writing of thsice pickup files.
190    o pkg/atm_compon_interf:
191      - move all field individual export-call out of cpl_export_import_data.F
192        into new S/R ATM_EXPORT_FIELDS
193    o pkg/atm_compon_interf:
194      - store state variables (for now, only thSIce fields) just before beeing
195        exported (in cpl_export_import_data.F, like on ocean side) instead of from
196        atm_store_my_data.F like all exported fluxes.
197      - new version of pickup_cpl: write field names into meta file and read meta
198        file to find field postion in pickup. Also only write/read fields meeded for
199        restart (same logic as main pickup file ; also using pickupStrictlyMatch)
200    o pkg/dic:
201      - fix bug (added on 2014/08/30) in dic_atmos.F for the case dic_int1= 2 or 3.
202    o pkg/seaice: add new parameter SEAICEpressReplFac to choose between
203        pressure replacement method (=1., default) or original Hibler (1979) (=0.)
204        value can be from domain [0,1] to average between the two methods
205    o pkg/atm_phys:
206      - allow to provide 2-d map of albedo and mixed-layer depth from files (but
207        hold fixed in time).
208    
209    checkpoint65r (2015/12/21)
210    o pkg/seaice:
211        fix bug in tridiagonal solvers for SEAICE_OLx/y>0, this affects the JFNK
212        solver (offline.dyn_jfnk) and global_ocean.cs32x15.seaice -> updated
213    o pkg/seaice:
214      - fix a bug in computing areaS in (J-J -> J-1) that affects runs
215        when SEAICEscaleSurfStress=.TRUE.,
216      - apply areaW and areaS in S/R seaice_calc_lhs
217    o pkg/atm_phys:
218      - add diagnostics for 3-D, Nr+1 levels diagnostics of radiative fluxes
219        (shortwave & longwave, net & downward) and diagnostics of temp. tendency
220        for individual contribution (convection, LSC cond, radiation)
221      - add Ruth Geen etal, GRL 2016, radiation options (see paper supp.
222        information); activated with: solar_exponent=0. and wv_exponent=-1.
223    o pkg/ggl90:
224      - within IDEMIX add upper limit for horizontal group velocity to
225        avoid instability problems in the explicit horizontal diffusion term for
226        long time steps or high resolution
227    o pkg/diagnostics:
228      - simplify setting of local-array size in diagstats_output.F: uses "numLevels"
229        (from DIAGNOSTICS_SIZE.h) to allow to write out more than Nr levels.
230    o testreport:
231      - remove "-v" (verbose option) in default mpirun command.
232    o pkg/seaice/seaice_growth:
233      - catch potential division by zero in ITD code, does not change
234        verification results
235    o pkg/ecco:
236      - retire old codes to the Attic. The calls to retired functions are
237        left in a commented form in case they ever need to be re-activated.
238      - ecco_check.F: issue warning if any old CPP option is
239        defined that corresponds to retired codes -- then stop.
240    o pkg/atm_compon_interf:
241      - change seaice fraction (use for OCN dic surf.flux) stored and sent to
242        coupler: use last time-step value instead of average over cplSendFrq_iter
243        time-step, similar to what is done for seaIceMass.
244        This will affect results (pkg/dic) of coupled ATM-OCN+dic set-up.
245    o eesupp & genmake2:
246      - from Jinxuan Zhu: change etime fct call to S/R call (fix gfortran ETIME);
247        <= remove until a fix is found for some ifort version on ia32 machine.
248    o pkg/seaice/seaice_evp:
249      - refine residual computation
250    
251    checkpoint65q (2015/11/18)
252    o pkg/seaice/seaice_evp:
253      - fix residual computations so that they no longer affect the actual
254        simulation code
255      - fix seaice_readparams to be able to actually set new parameters
256        SEAICEaEVPcStar and SEAICEaEVPalphaMin, also fix logic a little
257    o model/src:
258      - fix wrong truncation (single prec) from "FLOAT" function in expressions
259        like: deltaT*FLOAT(myIter) when myIter is large:
260         a) replaced by DFLOAT (if not seen by TAF);
261         b) remove "FLOAT" and use implicit type conversion (if seen by TAF).
262    o pkg/aim_v23:
263      - write/read the expected CO2 pickups (from S/R AIM_DO_CO2): fix reading
264        when pickupSuff is set ; do write rolling pickups + at the end of the run.
265    o pkg/atm_ocn_coupler + ocn_compon_interf:
266      - in prep for using pkg/seaice Dyn in coupled set-up, implement sequential
267        coupling option-1: ATM -(cpl)-> OCN and then OCN -(cpl)-> ATM ;
268        add corresponding call in DO_OCEANIC_PHYS.
269    o coupler pkgs:
270      Start a new way to set-up optionally-exchanged variables (previously, only
271       there for exchange_DIC): switch on/off from 1 place, at run-time, in coupler
272       data.cpl (new) instead of at compile time in ATMIDS.h & OCNIDS.h ;
273       send switch to ATM & OCN compon before reading their own "data.cpl" (so that
274       compononent param default can be set accordingly).
275      Note: this new switch (cpl_exchange_[xxx]) is not a per variable switch
276       but rather applies to a group a fields (going both ways like for DIC)
277       and corresponds to an option of coupling config.
278      coupler (pkg/atm_ocn_coupler):
279      - change parameter file from "data" to "data.cpl" (in cpl_read_params.F),
280        and read namelist directly (without eessup S/R calls) instead of
281        in the very un-flexible old way, 1 param per line, in fixed order;
282      - add error-counter to track errors (e.g., missing "data.cpl") and to stop
283        cleanly in CPL_CHECK_CPLCONFIG
284      - add new coupling-exchange selectors (some not yet active) including
285        cpl_exchange_DIC (to set to 3 to replace atmCpl_exchange_DIC=T in ATMIDS.h
286                                             and ocnCpl_exchange_DIC=T in OCNIDS.h);
287      - add 2 new S/R (CPL_SEND_ATM/OCN_CPLPARMS) to send coupler-params to each
288        component ; called directly from coupler.F, after comp. registrations;
289      - rename few variable-ID names (in ATMIDS.h & OCNIDS.h):
290         atm/ocnSeaIceName --> atm/ocnSIceMassName ; atm/ocnFCO2Name ->
291          -> atm/ocnCO2FluxName ; atm/ocnWSpdName --> atm/ocnWindSpdName
292      components (pkg/atm_ & ocn_compon_interf):
293      - add ATM/OCN_CPL_OPTIONS.h in component pkgs and include the corresponding
294        CPP header file in all pkg source files.
295      - move checking of comp. configs out of cpl_exch_configs.F into new S/R
296        ATM/OCN_CHECK_CPLCONFIG;
297      - add error-counter to track errors (e.g., in "data.cpl") and to stop
298        cleanly in ATM/OCN_CHECK_CPLCONFIG;
299      - add new S/R CPL_IMPORT_CPLPARMS to import coupling-exchange selectors
300        from coupler ; called from initialise_fixed.F, after PACKAGES_BOOT and
301        before PACKAGES_READPARMS;
302      verification/cpl_aim+ocn/:
303      - update ATMIDS.h & OCNIDS.h (in shared_code) and use new parameter file
304        "data.cpl" for coupler (in input_cpl).
305    o eesupp/inc:
306      - change the MPI-global-sum default (in CPP_EEOPTIONS.h) to:
307        #define GLOBAL_SUM_ORDER_TILES (only affects MPI built of global_sum_tile.F)
308        to always cumulate tile local-sum in the same order (still uses
309        MPI_Allreduce like standard code).
310      - in verification experiment code, remove local CPP_EEOPTIONS.h_mpi files
311        that are now identical to standard version (in eesupp/inc).
312    o pkg/shelfice:
313      - add SHELFICETransCoeffTFile for initializing spatially varying
314        heat and salt transfer coefficients
315    o pkg/atm_compon_interf & ocn_compon_interf:
316      - combine into 1 (new) S/R CPL_EXPORT_IMPORT_DATA the two previous
317        S/R CPL_EXPORT_MY_DATA & CPL_IMPORT_EXTERNAL_DATA
318      - move bi,bj loops inside S/R OCN_STORE_MY_DATA
319    o pkg/atm_ocn_coupler:
320      - initialise to zero ATMVARS.h & OCNVARS.h arrays.
321    o pkg/rbcs:
322      - select RBCS-mask for Temp & Salt the same way as for pTracer ; this allows
323        to compile with maskLEN=1 when all tracers use the same RBCS-mask.
324      - add a short report (to STDOUT) about RBCS-mask settings.
325    
326    checkpoint65p (2015/10/23)
327    o pkg/seaice/seaice_evp.F: fix store directives and key computations, since
328        there is no adjoint test for EVP, we don't know what it does to the adjoint
329        solution, but at least there are no more recomputation warnings left
330    o pkg/seaice/seaice_evp.F: slight modification of averaging so that EVP stands
331        a chance of giving the same results as a fully converged VP (JFNK) solver
332    o tools/adjoint_options/adjoint_diva:
333      - fix bug (typo) in Tang-Linear FLAGS setting for MPI + DIVA
334    o pkg/streamice:
335      - spotted bug in streamice_driving_stress using dyG where should have been dxG
336    o pkg/exf:
337      - remove STOP statement that prevented to use wind or (wind-)stress
338        interpolation for constant-in-time forcing fields (wind/stress period = 0).
339    o pkg/seaice:
340      - replace SEAICE_EVP_USE_ADAPTATION by run time parameters, requires
341        5 additionals 2D fields and 6 new store directives
342      - change logic in seaice_readparms.F: EVP code can now be turned on in
343        various ways, setting SEAICE_deltaTev is no longer required,
344        alternatively set SEAICE_evpAlpha/Beta, SEAICEuseEVPstar, SEAICEuseEVPrev,
345        or SEAICEaEVPcoeff
346    o pkg/shelfice/shelfice_thermodynamics.F
347      - redefining uLoc/vLoc to u/v, instead of 2u/v
348    o pkg/seaice/seaice_evp.F: introduce "adaptive EVP" by Madlen Kimmritz
349      - this is an intermediate state of a truely converging EVP that has
350        the potential of outperforming implicit VP methods, I do not recommend
351        using it yet.
352      - for now, "adaptive EVP" is turned on by setting SEAICE_EVP_USE_ADAPTATION
353        and all parameters are hardwired
354      - for convergence it still requires very smooth regularisations, that means,
355        if SEAICE_DELTA_SMOOTHREG is defined, deltaCreg=deltaC+deltaMin, which is
356        different from the VP case with deltaCreg=sqrt(deltaC**2+deltaMin**2); also
357        specific averaging appears to be required, still subject to tuning
358      - still needs cleaning and I need to turn parameter into runtime parameters
359      - add code to compute and print residuals of iteration, compile with
360        defining ALLOW_SEAICE_EVP_RESIDUAL to enable it
361    o pkg/seaice/seaice_evp.F: fix a bug (factor of four in front of e12Csq)
362      that entered with r1.54 on Sep04, 2015, -> update results
363    
364    checkpoint65o (2015/09/14)
365    o pkg/mom_vecinv & mom_common:
366      - add deep-atmosphere geometry factor in mom_calc_visc.F + in routines
367        called from there.
368      - add anelastic and deep-atmosphere geometry factor in pkg/mom_vecinv ; this
369        allows to use Vector-Invariant form in deep atmos and anelastic formulation
370    o pkg/seaice: introduce fast ice parameterisation following Itkin et al. (2015)
371      and Koenig-Beatty+Holland (2012)
372      - two new parameters SEAICE_tensilFac and SEAICE_tensilDepth
373      - global 2D field tensileStrength, computed in seaice_calc_ice_strength
374      - requires an extra input argument for S/R seaice_calc_viscosities
375      - tensileStrength's depth dependence is different from Itkin et al. (2015)
376        (to be changed and played with, for now exponential)
377    o pkg/seaice: introduce new parameter SEAICEscaleSurfStress (default = .FALSE.)
378      - if TRUE scale ice-ocean and ice-atmosphere stress acting on sea ice
379        by AREA according to Connelly et al. (2004), JPO.
380      - For EVP and the LSR solver, the implicit part of the drag term is
381        the only non-zero term in the denominator when there is no ice (which
382        prevented running the model with zero ice-ocean drag). If
383        SEAICEscaleSurfStress = .TRUE., this results in a division by zero
384        (or zero main diagonals BU/BV) which need to be caught. A practical
385        consequence is that for open water, the momentum equation reduce
386        to trivially 0 = 0 + 0 (for EVP). For LSR, BU/BV are reset to 1, if
387        they happen to be zero, often leading to a non-zero solution over
388        open water.
389    o pkg/seaice: revise EVP code (seaice_evp.F) in preparation for a more
390        efficient EVP method.
391      - introduce area-weighted averages for e12 (analogously to
392        seaice_calc_viscosities.F); this totally changes lab_sea.hb87 (2 digits
393        remain, but also changing the order of terms in the previous average
394        changed the results as much) -> update experiment
395      - add SEAICE_DELTA_SMOOTHREG code
396      - disentangle computation of zetaC/deltaC and zetaZ/deltaZ, also for
397        TEM-code
398      - adjust loop bounds so that only required fields are computed
399      - add new averaging code for zetaZ/deltaZ (again similar to
400        seaice_calc_viscosities.F), inactive by default for now (will change
401        results again), but will replace old code eventually
402    o eesupp/src:
403      - add an other alternative for multi-proc GLOBAL_SUM (in global_sum_tile.F)
404        to always cumulate tile local-sum in the same order
405        (option #define GLOBAL_SUM_ORDER_TILES in CPP_EEOPTIONS.h).
406        Still uses MPI_Allreduce (like standard code) but on array of tiles
407        and should be faster than GLOBAL_SUM_SEND_RECV code.
408      - switch almost all verification experiments that use GLOBAL_SUM_SEND_RECV
409        (defined in CPP_EEOPTIONS.h_mpi) to GLOBAL_SUM_ORDER_TILES instead.
410      - add CPP_EEOPTIONS.h_mpi with GLOBAL_SUM_ORDER_TILES defined in 14 more exp.:
411         aim.5l_cs, cheapAML_box, deep_anelastic, dome, fizhi-cs-32x32x40,
412         fizhi-cs-aqualev20, fizhi-gridalt-hs, global_ocean_ebm, matrix_example,
413         natl_box, solid-body.cs-32x32x1, tutorial_advection_in_gyre,
414         tutorial_baroclinic_gyre and tutorial_held_suarez_cs.
415    
416    checkpoint65n (2015/07/29)
417    o pkg/thsice:
418      - add a warning when used with pkg/aim but without updating SST
419        (stepFwd_oceMxL=F & useCoupler=F & tauRelax_MxL<>-1 ).
420    o pkg/offline:
421      - change where Offline-Fields are loaded, from load_fields_driver.F to
422        directly within FORWARD_STEP, just after updating iter number and time;
423      - move setting of GM and KPP diffusivity out of OFFLINE_FIELDS_LOAD into new
424        S/R OFFLINE_GET_DIFFUS that is called towards the end of DO_OCEANIC_PHYS;
425       These changes allow:
426        a) to recover exactly on-line results using deltaToffline=deltaTClock,
427        tested (using offlineIter0= nIter0 -1 and offlineTimeOffset= -deltaT/2)
428        both with Lin & Non-Lin Free-Surf, both with staggerTimeStep & synchronous
429        time-step, both with GM & KPP files and with recomputing these fields;
430        b) no needs to switch on staggerTimeStep anymore;
431        c) simplify rescaling of offline horiz. velocity with Non-Lin Free-Surf.
432      - update output of experiment tutorial_dic_adjoffline (only 3 digits left).
433    o pkg/offline:
434      - change (rarely used) offset-iteration parameter to an offset time (in s):
435        can easily recover previous offset-iter effect by setting offset-time
436        (offlineTimeOffset) to offset-iter x deltaToffline;
437      - do not turn-off Temp & Salinity surface relaxation when using KPP (used
438        in KPP as part of surface buoyancy forcing) in offline run.
439      - fix ptracers KPP non-local term in the case where KPP is re-computed.
440    o OpenAD
441      - Adding preliminary ggl90 test to OpenAD verification.
442        Config. with ggl90 currently diverges after 64 time steps
443        so will need more work to become more stable
444      - Adding preliminary kpp test to OpenAD verification.
445        required small tweakes in kpp_routines.F
446      - Merge and update from Krishna Narayanan's contrib area:
447        * Add one variable for preliminary OpenAD DIVA
448        * Add replacement time-stepping for OpenAD DIVA
449        * genmake2 flag -diva (but only for OpenAD; preliminary)
450        * required modifs for OAD_support
451        successful preliminary test for tutorial_global_oce_biogeo/
452    o pkg/seaice:
453      - initialise deltaC in seaice_lsr, cosmetic changes in seaice_lsr
454      - add cpp-flag SEAICE_DELTA_SMOOTHREG for option of regularising
455        delta with a smooth function in s/r seaice_calc_viscosity
456        (no effect on EVP)
457      - rename local suffix "sqr" into "sq" for more consistent variable names
458    o pkg/seaice:
459        add new parameter SEAICE_deltaMin that is used ***only***
460        for regularizing Delta (and nothing else, like the parameter
461        which is also used for all sorts of things SEAICE_EPS).
462        Defaults to SEAICE_EPS for backward compatibility only.
463    o pkg/seaice: replace erroneously storing e12Csqr on the wrong tape with
464        the wrong key by inialising it before use -> fixes a recomputation
465        problem but does not fix the gradient
466    o pkg/layers:
467      - move resetting of flux arrays to outside the iLa loop
468        (this caused layers_diapycnal to not work with more than one layer coord.)
469      - fix bug in calculation of layers_recip_delta in layers_init_fixed.F
470    o pkg/layers:
471      - remove from common block 3D layers fields (used to diagnose transport
472        in tracer coords) and declare them as local arrays in layers_calc.F
473    o pkg/seaice:
474      - Rename SEAICE_VECTORIZE_LSR_ZEBRA to SEAICE_LSR_ZEBRA and define it
475        in lab_sea forward experiment (changes results -> updated)
476      - update adjoint experiment lab_sea after cleaning up seaice_lsr_tridiagu/v
477    o pkg/seaice: modify seaice_lsr.F in order to improve the gradient
478       computations; for SEAICE_VECTORIZE_LSR
479      - move the loops over which the tridiagonal solvers (seaice_lsr_tridiagu/v)
480        sweep to the outside,
481      - remove store directives and add "CADJ loop sequential" directives
482        in analogy to model/src/solve_tridiagonal.F
483      - replace many "#ifdef SEAICE_VECTORIZE_LSR_ZEBRA" by variable loop
484        boundaries to yield more readable code. This has also the charming side
485        effect that your can use SEAICE_VECTORIZE_LSR_ZEBRA without
486        SEAICE_VECTORIZE_LSR (i.e. adjoint without recomputations in
487        seaice_lsr_tridiagu/v now requires either of these flags, vectorization
488        still requires SEAICE_VECTORIZE_LSR with SEAICE_VECTORIZE_LSR_ZEBRA as
489        an additional option)
490       The tridiagonal solvers are now completely analoguous to solve_tridiagonal.F
491       but the adjoint gradients (which are affected by this change) still explode.
492    o coupler (atm & ocn _compon_interf):
493      - avoid using Exch2 IO mapping if not suitable.
494    
495    checkpoint65m (2015/06/15)
496    o pkg/layers:
497      - clean-up old parameters setting (from Sep 2012):
498        + remove old parameters setting from common block (declared locally);
499        + stop if any old parameter is mixed with new parameters;
500        + check for valid or consistent parameter setting (e.g., layers_name)
501      - check that layers_bounds for Pot.Density are in the right range;
502        this is supposed to catch un-updated setting after recently shifting
503        potential density field "prho" by -1000 (now in "sigma" scale).
504    o pkg/layers:
505      - Added missing call to layers_fill for keeping track of tottend in
506        pkg/diagnostics/diagnostics_fill_state.F
507    o pkg/layers:
508      - added CPP flux LAYERS_FINEGRID_DIAPYCNAL to disable fine-grid binning
509        of diapycnal fluxes
510    o pkg/layers:
511      - reverted changes to interpolation to previous treatment; there
512        was never actually a problem
513    o pkg/layers:
514      - fix interpolation of layers tracers in the presence of partial cells
515      - add lots of new functionality to compute water mass transformation
516        (enabled by CPP flag LAYERS_THERMODYNAMICS)
517      - add new calls from main code (diags_oceanic_surf_flux.F,
518        thermodynamics.F, impldiff.F) and gad to save the necessary fields
519        for layers_thermodynamics calculations
520    o pkg/ptracers:
521      - add capability of stepping a passive tracer forward without advection
522        by setting PTRACERS_advScheme to 0.
523    o pkg/diagnostics:
524      - add few (threads) _BARRIER around any update of "diag_pkgStatus".
525    o pkg/layers:
526      - shift potential density field "prho" by -1000 for density layer averaging so
527        that it corresponds to usual "sigma" definition (i.e., rho(p=const)-1000);
528        Note that density bin boundaries (layers_bounds in data.layers) have
529        to be set accordingly (i.e., shifted, in sigma scale).
530  o pkg/layers:  o pkg/layers:
531    - 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
532    - fix calculation of layer non-weighted velocity and layer probability    - fix calculation of layer non-weighted velocity and layer probability

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