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revision 1.2168 by heimbach, Thu Jul 2 15:59:16 2015 UTC revision 1.2250 by jmc, Sun May 8 19:15:17 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 verification/global_ocean.cs32x15:
8      - change secondary test "viscA4" to also test "selectP_inEOS_Zc=3"
9        with "selectNHfreeSurf=1".
10    o model/src (non-hydrostatic free-surface):
11      - More "natural" expression of NH free-surface term (case selectNHfreeSurf=1):
12        was: tmpSurf/(1+tmpSurf); changed to: 1/(1+Gamma) with Gamma=1/tmpSurf.
13      - Calculate surface vertical velocity after 2-D solver adjustment (accounts
14        for EmPmR if RealFreshWaterFlux); used in RHS (cg3d_b) if exactConserv
15        and used to compute dPhiNH (in post_cg3d.F) if selectNHfreeSurf=1.
16        This fixes EmPmR contribution when selectNHfreeSurf=1 & RealFreshWaterFlux.
17      - Update output (changes at machine truncation level) of verification exp:
18        exp4 (11 digits for cg2d), global_ocean.cs32x15.viscA4 (11.d),
19        short_surf_wave (13.d) and tutorial_deep_convection.smag3d (12.d).
20    o pkg/seaice: ITD code
21      - fix picking up from a single category model by initialising
22        heff/area/hsnowITD = 0. in seaice_itd_pickup.F
23      - split a long warning message in seaice_check_pickup.F into two lines,
24        because NEC SX-ACE cannot deal with the long line.
25    o model/src:
26      - fix missing dPhiNH in pressure_for_eos.F (case: selectP_inEOS_Zc=3)
27    o pkg/seaice:
28      - add missing checks for SEAICE_ALLOW_KRYLOV and SEAICE_ALLOW_BOTTOMDRAG
29    o pkg/seaice:
30      - add basal stress as parameterisation for grounding ice
31        following Lemieux et al. (2015)
32      - turn on by setting new parameter SEAICEbasalDragK2 to a value
33        larger than 0. Lemieux et al. (2015) recommend 15.
34      - The adjoint complains with extra recomputations so there is also a
35        new cpp-flag SEAICE_ALLOW_BOTTOMDRAG that is undefined by default in
36        order to postpone the problem
37      - compile the new code in lab_sea
38    o verification/halfpipe_streamice:
39      - update both TAF and OpenAD adm output (machine truncation differences)
40    
41    checkpoint65v (2016/04/08)
42    o verification/advect_xz:
43      - increase overlap size from 3 to 4 and add new secondary test for PQM
44        advection scheme (with mono & wino limiter).
45      - change main exp. to test PPM (with weno limiter) adv.scheme on Temp.
46    o model/src:
47      - new parameters "top_Pres" & "seaLev_Z" (replacing Ro_SeaLevel and recently
48        added phi0Ref) to set vertical axis origin and phiRef origin;
49        keep Ro_SeaLevel for backward compatibility (with a warning).
50       According to coordinate and fluid type:
51        OCN in Z: top_Pres(Ref) (=rhoConst*PhiRef(1)), seaLev_Z (=rF(1), @ the top)
52        ATM in Z: top_Pres(Ref) (=rhoConst*PhiRef(1)), seaLev_Z (=rF(Nr+1) @ bottom)
53        OCN in P: top_Pres (=rF(Nr+1)), seaLev_Z (= PhiRef(Nr+1)/g, @ the top)
54        ATM in P: top_Pres (=rF(Nr+1)), seaLev_Z (= PhiRef(1)/g, @ the bottom)
55      - remove Ro_SeaLevel from ATM experiment parameter files;
56      - in tutorial_global_oce_in_p, remove Ro_SeaLevel and set top_Pres to the
57        complement; update output.txt (changes at machine truncation level).
58    o pkg/seaice/seaice_evp.F
59      - simplify computation of deltaZ and zetaZ to simple averaging following
60        Bouillon et al. (2013). This removes a lot of code, but also changes
61        verification experiment lab_sea.hb87 -> updated
62    
63    checkpoint65u (2016/03/14)
64    o pkg/generic_advdiff:
65      - from Darren: add PPM and PQM advection schemes (number 40-42 and 50-52)
66        with 2 types of limiter (see: Engwirda & Kelley, submit. to JCP);
67        Note (from Darren): unlimited PPM/PQM scheme (40 & 50) are just for
68        testing and not for actual use.
69    o model/src:
70      - add parameter "phi0Ref" to specify reference [pressure/geo] potential at
71        origin r = rF(1);
72      - add options (parameter selectP_inEOS_Zc) to select which pressure to use
73        in EOS for height coordinate: enable to include NH Pressure or to use
74        more accurate pressure vertical profile; options not linked to EOS type
75        (as previously, e.g., JMD95P/JMD95Z) but set default according to EOS type;
76      - start to implement variable gravity (along vertical): for now, only with
77        z-coords (not even z*).
78      - add Ideal Gas equation of state for height coordinate.
79      - update OpenAD output (affected at machine truncation level) of exp:
80        global_ocean.90x40x15, OpenAD (std) and tutorial_global_oce_biogeo.
81    o pkg/exf:
82      - add ALLOW_EXF_OUTPUT_INTERP cpp switch to output the result
83        of exf interpolation (before any rescaling, rotation or interpolation
84        to velocity point) for each field that gets loaded from file. This option
85        identically mimics the input file organization (e.g. record numbers in year
86        by year input files) besides the change in horizontal grid.
87      - add rotateStressOnAgrid run-time switch so that wind stress fields
88        can be provided on the A-grid in zonal/meridional direction and
89        rotated on the fly. This only applies to the case when the exf
90        interpolation is off and rotateStressOnAgrid is false by default.
91    o model/src:
92      - rename internal parameter "useDynP_inEos_Zc" to "storePhiHyd4Phys" (since
93        it's also used with pkg/atm_phys) and add few more parameters (but still
94        inactive, src code yet to come)
95    
96    checkpoint65t (2016/02/10)
97    o pkg/atm_phys:
98      - from Ruth Geen: add optical depth dependence on CO2 concentration.
99    o model/src:
100      - fix vertical inter/extra-polation of density factor rhoFacF (for anelastic)
101        for the case setCenterDr=T (delRc set from "data"); add output of rhoFacC&F.
102        Update output of exp. deep_anelastic (changes at truncation level).
103    o tools:
104      - add a hack in "remove_comments_sed" (used only with TAF) for recent
105        version of OpenMPI (shipped with FC.23): comment out the new header
106        file "mpif-sizeof.h" which causes problems to TAF.
107    o pkg/seaice:
108      - change the termination criterion so that maxits (SEAICElinearIterMax)
109        has an effect
110      - unify iteration parameters for implicit solvers (JFNK and Picard)
111        SEAICEnonLinIterMax replaces SEAICEnewtonIterMax/NPSEUDOTIMESTEPS
112        SEAICElinearIterMax replaces SEAICEkrylovIterMax/SOLV_MAX_ITER
113        SEAICEpreLinIterMax replaces SOLV_MAX_ITER in preconditioner
114        SEAICEpreNL_IterMax replaces NPSEUDOTIMESTEPS in preconditioner
115        SEAICEnonLinTol     replaces JFNKgamma_nonlin
116      - remove S/R SEAICE_FGMRES_DRIVER and put content into S/R SEAICE_JFKN
117      - add new Picard-Krylov solver, compile with SEAICE_ALLOW_KRYLOV and
118        use with SEAICEuseKrylov
119    o pkg/seaice/seaice_lsr.F
120        fix small bug: replace zetaZ by zetaZloc in S/R seaice_lsr_rhsu/v; only
121        relevant if SEAICEuseStrImpCpl=T, and even then it does not seem to have
122        an effect.
123    o pkg/seaice: add two new parameters
124      - SEAICEuseLSR to simplify the logic in seaice_dynsolver (this
125        parameter is not in any namelist)
126      - SEAICEusrPicardAsPrecon to allow s/r seaice_lsr to be used as
127        a preconditioner for the non-linear Newton iteration of the JFNK
128        solver
129    o pkg/seaice/seaice_lsr.F: replace 1./SEAICE_deltaTdyn with recip_deltaT,
130      affects some experiments at truncation level:
131      - global_ocean.cs32x15.icedyn (11 digits),
132      - global_ocean.cs32x15.seaice (11 digits),
133      - seaice_itd (12 digits), seaice_itd.lipscomb07 (12 digits) -> update
134      - also update global_ocean.cs32x15 adjoint and tangent-linear results
135    o pkg/salt_plume & pkg/thsice:
136      - for coupled  set-up with pkg/thsice in ATM and pkg/salt_plume in OCN,
137        connect salt_plume flux to ATM-OCN coupling pkgs interface:
138       a) in ATM: also cumulate salt-plume flux in S/R THSICE_SALT_PLUME (for
139         export to coupler interface) even without compiling pkg/salt_plume ;
140       b) in OCN: apply coupler salt-plume flux to pkg/salt_plume field
141         (saltPlumeFlux) just before exch call, in S/R SALT_PLUME_DO_EXCH.
142    o pkg/dic:
143      - use the updated seaice fraction (from seaice pkgs) for DIC forcing
144        instead of the previous time-step value ; done in new S/R DIC_FIELDS_UPDATE
145        called from the top of dic_biotic_forcing.F (instead of in DIC_FIELDS_LOAD);
146      - move also update with values from ATM-OCN Coupler in the same new S/R
147        (previously done in ocn_apply_import.F).
148    o tools/adjoint_options:
149      - specify explicitly "-f77" or "-f90" in default ad-optfile since TAF (default)
150        has been changed on Jan 14, 2016.
151    o pkg/ggl90:
152      - add alternative discretisation of vertical shear (off by default), to
153        compute the mean (@ grid-cell center) of vertical shear compon instead of
154        vertical shear of mean flow (@ grid-cell center).
155      - add correct parenthesis in ALLOW_GGL90_SMOOTH code to get the same truncated
156        results on adjacent faces of cubed-sphere grids; this fix the restart.
157    o pkg/atm_compon_interf:
158      - skip time-ave over cpl_atmSendFrq of Sea-Level Pressure (atmSLPr) and just
159        pass last value, stored directly before export to CPL ;
160        Note: this affects results of Coupled set-up where OCN uses useImportSLP=T
161      - remove atmSLPr from pickup files (no longer needed for restart)
162    
163    checkpoint65s (2016/01/13)
164    o eesupp & genmake2:
165       - first check for Function ETIME and, if it fails, then check for subroutine
166         ETIME and consistent output; use the appropriate version in timers.F
167    o model/src:
168      - to check restart test, add option to apply EXCH to U,V earlier, just before
169        integr_continuity; turned off by default.
170    o pkg/dic:
171      - remove CPP option USE_ATMOSCO2 (not needed)
172    o tools/tst_2+2:
173      - try to ignore difference between +0 and -0 in binary file, causing test
174        to fail for no good reason.
175    o eesupp & genmake2:
176      - put back modif from Jinxuan Zhu - change etime fct call to S/R call -
177        but also check (in genmake2) that test runs and returns meaningful results.
178    o coupler pkgs:
179      Finish implementation of optionally-exchanged variable switches (started on
180       Nov 12) with addition of few more exchanged fields, including 2-way exchange
181       of pkg/thsice vars to allow to use seaice dynamics (from pkg/seaice) & seaice
182       advection in OCN component; this requires sequential coupling.
183      coupler (pkg/atm_ocn_coupler):
184      - add argument msgUnit and iter number to CPL_SEND/RECV_ATM/OCN_FIELDS
185        routines (useful for debug).
186      - only export/import optionally exchanged fields (RunOff, seaice, Salt-Plume
187         flux, DIC fields) if corresponding switch is ON.
188      - add option to export RunOff to OCN (to use for DIC river input)
189      - add 2-way thSIce vars exchange; check for consistent cpl_sequential setting.
190      components (pkg/atm_ & ocn_compon_interf):
191      - to save memory space in ATM & OCN comp: add some #ifdef ALLOW_${PKG} around
192        optionally exchanged fields; add a check & stop in cpl_readparms.F.
193        ATMCPL.h: ALLOW_LAND for RunOff, ALLOW_THSICE for seaice, ALLOW_AIM for CO2;
194        OCNCPL.h: ALLOW_SALT_PLUME, ALLOW_DIC for DIC, ALLOW_THSICE for 2-W thsice.
195      - rename:   fracIce     -> sIceFrac_cpl (<- match coupler var name)
196        + in ATM: fracIceTime -> sIceFracTime ; seaIceTime -> sIceMassTime.
197      - add 2-way thSIce vars exchange ; add Salt-Plume flux ; add RunOff in OCN.
198      - hold in common block coupler optionally-exchanged variable switch
199        and set default "useImportXXX" accordingly; + check & stop if inconsistent.
200      - add diagnostics for all imported fields from coupler (in both OCN & ATM);
201        this is intended to replace the OCN cplFldtave.* output files (not updated
202        to contain new additional exchanged fields).
203    o pkg/dic:
204      - fix an other bug (also from 2014/08/30) in dic_atmos.F, in dic_int1=3 code.
205    o pkg/thsice:
206      - when coupled to ATM (useCoupler) with thSIce_skipThermo=T, skip reading
207        and writing of thsice pickup files.
208    o pkg/atm_compon_interf:
209      - move all field individual export-call out of cpl_export_import_data.F
210        into new S/R ATM_EXPORT_FIELDS
211    o pkg/atm_compon_interf:
212      - store state variables (for now, only thSIce fields) just before beeing
213        exported (in cpl_export_import_data.F, like on ocean side) instead of from
214        atm_store_my_data.F like all exported fluxes.
215      - new version of pickup_cpl: write field names into meta file and read meta
216        file to find field postion in pickup. Also only write/read fields meeded for
217        restart (same logic as main pickup file ; also using pickupStrictlyMatch)
218    o pkg/dic:
219      - fix bug (added on 2014/08/30) in dic_atmos.F for the case dic_int1= 2 or 3.
220    o pkg/seaice: add new parameter SEAICEpressReplFac to choose between
221        pressure replacement method (=1., default) or original Hibler (1979) (=0.)
222        value can be from domain [0,1] to average between the two methods
223    o pkg/atm_phys:
224      - allow to provide 2-d map of albedo and mixed-layer depth from files (but
225        hold fixed in time).
226    
227    checkpoint65r (2015/12/21)
228    o pkg/seaice:
229        fix bug in tridiagonal solvers for SEAICE_OLx/y>0, this affects the JFNK
230        solver (offline.dyn_jfnk) and global_ocean.cs32x15.seaice -> updated
231    o pkg/seaice:
232      - fix a bug in computing areaS in (J-J -> J-1) that affects runs
233        when SEAICEscaleSurfStress=.TRUE.,
234      - apply areaW and areaS in S/R seaice_calc_lhs
235    o pkg/atm_phys:
236      - add diagnostics for 3-D, Nr+1 levels diagnostics of radiative fluxes
237        (shortwave & longwave, net & downward) and diagnostics of temp. tendency
238        for individual contribution (convection, LSC cond, radiation)
239      - add Ruth Geen etal, GRL 2016, radiation options (see paper supp.
240        information); activated with: solar_exponent=0. and wv_exponent=-1.
241    o pkg/ggl90:
242      - within IDEMIX add upper limit for horizontal group velocity to
243        avoid instability problems in the explicit horizontal diffusion term for
244        long time steps or high resolution
245    o pkg/diagnostics:
246      - simplify setting of local-array size in diagstats_output.F: uses "numLevels"
247        (from DIAGNOSTICS_SIZE.h) to allow to write out more than Nr levels.
248    o testreport:
249      - remove "-v" (verbose option) in default mpirun command.
250    o pkg/seaice/seaice_growth:
251      - catch potential division by zero in ITD code, does not change
252        verification results
253    o pkg/ecco:
254      - retire old codes to the Attic. The calls to retired functions are
255        left in a commented form in case they ever need to be re-activated.
256      - ecco_check.F: issue warning if any old CPP option is
257        defined that corresponds to retired codes -- then stop.
258    o pkg/atm_compon_interf:
259      - change seaice fraction (use for OCN dic surf.flux) stored and sent to
260        coupler: use last time-step value instead of average over cplSendFrq_iter
261        time-step, similar to what is done for seaIceMass.
262        This will affect results (pkg/dic) of coupled ATM-OCN+dic set-up.
263    o eesupp & genmake2:
264      - from Jinxuan Zhu: change etime fct call to S/R call (fix gfortran ETIME);
265        <= remove until a fix is found for some ifort version on ia32 machine.
266    o pkg/seaice/seaice_evp:
267      - refine residual computation
268    
269    checkpoint65q (2015/11/18)
270    o pkg/seaice/seaice_evp:
271      - fix residual computations so that they no longer affect the actual
272        simulation code
273      - fix seaice_readparams to be able to actually set new parameters
274        SEAICEaEVPcStar and SEAICEaEVPalphaMin, also fix logic a little
275    o model/src:
276      - fix wrong truncation (single prec) from "FLOAT" function in expressions
277        like: deltaT*FLOAT(myIter) when myIter is large:
278         a) replaced by DFLOAT (if not seen by TAF);
279         b) remove "FLOAT" and use implicit type conversion (if seen by TAF).
280    o pkg/aim_v23:
281      - write/read the expected CO2 pickups (from S/R AIM_DO_CO2): fix reading
282        when pickupSuff is set ; do write rolling pickups + at the end of the run.
283    o pkg/atm_ocn_coupler + ocn_compon_interf:
284      - in prep for using pkg/seaice Dyn in coupled set-up, implement sequential
285        coupling option-1: ATM -(cpl)-> OCN and then OCN -(cpl)-> ATM ;
286        add corresponding call in DO_OCEANIC_PHYS.
287    o coupler pkgs:
288      Start a new way to set-up optionally-exchanged variables (previously, only
289       there for exchange_DIC): switch on/off from 1 place, at run-time, in coupler
290       data.cpl (new) instead of at compile time in ATMIDS.h & OCNIDS.h ;
291       send switch to ATM & OCN compon before reading their own "data.cpl" (so that
292       compononent param default can be set accordingly).
293      Note: this new switch (cpl_exchange_[xxx]) is not a per variable switch
294       but rather applies to a group a fields (going both ways like for DIC)
295       and corresponds to an option of coupling config.
296      coupler (pkg/atm_ocn_coupler):
297      - change parameter file from "data" to "data.cpl" (in cpl_read_params.F),
298        and read namelist directly (without eessup S/R calls) instead of
299        in the very un-flexible old way, 1 param per line, in fixed order;
300      - add error-counter to track errors (e.g., missing "data.cpl") and to stop
301        cleanly in CPL_CHECK_CPLCONFIG
302      - add new coupling-exchange selectors (some not yet active) including
303        cpl_exchange_DIC (to set to 3 to replace atmCpl_exchange_DIC=T in ATMIDS.h
304                                             and ocnCpl_exchange_DIC=T in OCNIDS.h);
305      - add 2 new S/R (CPL_SEND_ATM/OCN_CPLPARMS) to send coupler-params to each
306        component ; called directly from coupler.F, after comp. registrations;
307      - rename few variable-ID names (in ATMIDS.h & OCNIDS.h):
308         atm/ocnSeaIceName --> atm/ocnSIceMassName ; atm/ocnFCO2Name ->
309          -> atm/ocnCO2FluxName ; atm/ocnWSpdName --> atm/ocnWindSpdName
310      components (pkg/atm_ & ocn_compon_interf):
311      - add ATM/OCN_CPL_OPTIONS.h in component pkgs and include the corresponding
312        CPP header file in all pkg source files.
313      - move checking of comp. configs out of cpl_exch_configs.F into new S/R
314        ATM/OCN_CHECK_CPLCONFIG;
315      - add error-counter to track errors (e.g., in "data.cpl") and to stop
316        cleanly in ATM/OCN_CHECK_CPLCONFIG;
317      - add new S/R CPL_IMPORT_CPLPARMS to import coupling-exchange selectors
318        from coupler ; called from initialise_fixed.F, after PACKAGES_BOOT and
319        before PACKAGES_READPARMS;
320      verification/cpl_aim+ocn/:
321      - update ATMIDS.h & OCNIDS.h (in shared_code) and use new parameter file
322        "data.cpl" for coupler (in input_cpl).
323    o eesupp/inc:
324      - change the MPI-global-sum default (in CPP_EEOPTIONS.h) to:
325        #define GLOBAL_SUM_ORDER_TILES (only affects MPI built of global_sum_tile.F)
326        to always cumulate tile local-sum in the same order (still uses
327        MPI_Allreduce like standard code).
328      - in verification experiment code, remove local CPP_EEOPTIONS.h_mpi files
329        that are now identical to standard version (in eesupp/inc).
330    o pkg/shelfice:
331      - add SHELFICETransCoeffTFile for initializing spatially varying
332        heat and salt transfer coefficients
333    o pkg/atm_compon_interf & ocn_compon_interf:
334      - combine into 1 (new) S/R CPL_EXPORT_IMPORT_DATA the two previous
335        S/R CPL_EXPORT_MY_DATA & CPL_IMPORT_EXTERNAL_DATA
336      - move bi,bj loops inside S/R OCN_STORE_MY_DATA
337    o pkg/atm_ocn_coupler:
338      - initialise to zero ATMVARS.h & OCNVARS.h arrays.
339    o pkg/rbcs:
340      - select RBCS-mask for Temp & Salt the same way as for pTracer ; this allows
341        to compile with maskLEN=1 when all tracers use the same RBCS-mask.
342      - add a short report (to STDOUT) about RBCS-mask settings.
343    
344    checkpoint65p (2015/10/23)
345    o pkg/seaice/seaice_evp.F: fix store directives and key computations, since
346        there is no adjoint test for EVP, we don't know what it does to the adjoint
347        solution, but at least there are no more recomputation warnings left
348    o pkg/seaice/seaice_evp.F: slight modification of averaging so that EVP stands
349        a chance of giving the same results as a fully converged VP (JFNK) solver
350    o tools/adjoint_options/adjoint_diva:
351      - fix bug (typo) in Tang-Linear FLAGS setting for MPI + DIVA
352    o pkg/streamice:
353      - spotted bug in streamice_driving_stress using dyG where should have been dxG
354    o pkg/exf:
355      - remove STOP statement that prevented to use wind or (wind-)stress
356        interpolation for constant-in-time forcing fields (wind/stress period = 0).
357    o pkg/seaice:
358      - replace SEAICE_EVP_USE_ADAPTATION by run time parameters, requires
359        5 additionals 2D fields and 6 new store directives
360      - change logic in seaice_readparms.F: EVP code can now be turned on in
361        various ways, setting SEAICE_deltaTev is no longer required,
362        alternatively set SEAICE_evpAlpha/Beta, SEAICEuseEVPstar, SEAICEuseEVPrev,
363        or SEAICEaEVPcoeff
364    o pkg/shelfice/shelfice_thermodynamics.F
365      - redefining uLoc/vLoc to u/v, instead of 2u/v
366    o pkg/seaice/seaice_evp.F: introduce "adaptive EVP" by Madlen Kimmritz
367      - this is an intermediate state of a truely converging EVP that has
368        the potential of outperforming implicit VP methods, I do not recommend
369        using it yet.
370      - for now, "adaptive EVP" is turned on by setting SEAICE_EVP_USE_ADAPTATION
371        and all parameters are hardwired
372      - for convergence it still requires very smooth regularisations, that means,
373        if SEAICE_DELTA_SMOOTHREG is defined, deltaCreg=deltaC+deltaMin, which is
374        different from the VP case with deltaCreg=sqrt(deltaC**2+deltaMin**2); also
375        specific averaging appears to be required, still subject to tuning
376      - still needs cleaning and I need to turn parameter into runtime parameters
377      - add code to compute and print residuals of iteration, compile with
378        defining ALLOW_SEAICE_EVP_RESIDUAL to enable it
379    o pkg/seaice/seaice_evp.F: fix a bug (factor of four in front of e12Csq)
380      that entered with r1.54 on Sep04, 2015, -> update results
381    
382    checkpoint65o (2015/09/14)
383    o pkg/mom_vecinv & mom_common:
384      - add deep-atmosphere geometry factor in mom_calc_visc.F + in routines
385        called from there.
386      - add anelastic and deep-atmosphere geometry factor in pkg/mom_vecinv ; this
387        allows to use Vector-Invariant form in deep atmos and anelastic formulation
388    o pkg/seaice: introduce fast ice parameterisation following Itkin et al. (2015)
389      and Koenig-Beatty+Holland (2012)
390      - two new parameters SEAICE_tensilFac and SEAICE_tensilDepth
391      - global 2D field tensileStrength, computed in seaice_calc_ice_strength
392      - requires an extra input argument for S/R seaice_calc_viscosities
393      - tensileStrength's depth dependence is different from Itkin et al. (2015)
394        (to be changed and played with, for now exponential)
395    o pkg/seaice: introduce new parameter SEAICEscaleSurfStress (default = .FALSE.)
396      - if TRUE scale ice-ocean and ice-atmosphere stress acting on sea ice
397        by AREA according to Connelly et al. (2004), JPO.
398      - For EVP and the LSR solver, the implicit part of the drag term is
399        the only non-zero term in the denominator when there is no ice (which
400        prevented running the model with zero ice-ocean drag). If
401        SEAICEscaleSurfStress = .TRUE., this results in a division by zero
402        (or zero main diagonals BU/BV) which need to be caught. A practical
403        consequence is that for open water, the momentum equation reduce
404        to trivially 0 = 0 + 0 (for EVP). For LSR, BU/BV are reset to 1, if
405        they happen to be zero, often leading to a non-zero solution over
406        open water.
407    o pkg/seaice: revise EVP code (seaice_evp.F) in preparation for a more
408        efficient EVP method.
409      - introduce area-weighted averages for e12 (analogously to
410        seaice_calc_viscosities.F); this totally changes lab_sea.hb87 (2 digits
411        remain, but also changing the order of terms in the previous average
412        changed the results as much) -> update experiment
413      - add SEAICE_DELTA_SMOOTHREG code
414      - disentangle computation of zetaC/deltaC and zetaZ/deltaZ, also for
415        TEM-code
416      - adjust loop bounds so that only required fields are computed
417      - add new averaging code for zetaZ/deltaZ (again similar to
418        seaice_calc_viscosities.F), inactive by default for now (will change
419        results again), but will replace old code eventually
420    o eesupp/src:
421      - add an other alternative for multi-proc GLOBAL_SUM (in global_sum_tile.F)
422        to always cumulate tile local-sum in the same order
423        (option #define GLOBAL_SUM_ORDER_TILES in CPP_EEOPTIONS.h).
424        Still uses MPI_Allreduce (like standard code) but on array of tiles
425        and should be faster than GLOBAL_SUM_SEND_RECV code.
426      - switch almost all verification experiments that use GLOBAL_SUM_SEND_RECV
427        (defined in CPP_EEOPTIONS.h_mpi) to GLOBAL_SUM_ORDER_TILES instead.
428      - add CPP_EEOPTIONS.h_mpi with GLOBAL_SUM_ORDER_TILES defined in 14 more exp.:
429         aim.5l_cs, cheapAML_box, deep_anelastic, dome, fizhi-cs-32x32x40,
430         fizhi-cs-aqualev20, fizhi-gridalt-hs, global_ocean_ebm, matrix_example,
431         natl_box, solid-body.cs-32x32x1, tutorial_advection_in_gyre,
432         tutorial_baroclinic_gyre and tutorial_held_suarez_cs.
433    
434    checkpoint65n (2015/07/29)
435    o pkg/thsice:
436      - add a warning when used with pkg/aim but without updating SST
437        (stepFwd_oceMxL=F & useCoupler=F & tauRelax_MxL<>-1 ).
438    o pkg/offline:
439      - change where Offline-Fields are loaded, from load_fields_driver.F to
440        directly within FORWARD_STEP, just after updating iter number and time;
441      - move setting of GM and KPP diffusivity out of OFFLINE_FIELDS_LOAD into new
442        S/R OFFLINE_GET_DIFFUS that is called towards the end of DO_OCEANIC_PHYS;
443       These changes allow:
444        a) to recover exactly on-line results using deltaToffline=deltaTClock,
445        tested (using offlineIter0= nIter0 -1 and offlineTimeOffset= -deltaT/2)
446        both with Lin & Non-Lin Free-Surf, both with staggerTimeStep & synchronous
447        time-step, both with GM & KPP files and with recomputing these fields;
448        b) no needs to switch on staggerTimeStep anymore;
449        c) simplify rescaling of offline horiz. velocity with Non-Lin Free-Surf.
450      - update output of experiment tutorial_dic_adjoffline (only 3 digits left).
451    o pkg/offline:
452      - change (rarely used) offset-iteration parameter to an offset time (in s):
453        can easily recover previous offset-iter effect by setting offset-time
454        (offlineTimeOffset) to offset-iter x deltaToffline;
455      - do not turn-off Temp & Salinity surface relaxation when using KPP (used
456        in KPP as part of surface buoyancy forcing) in offline run.
457      - fix ptracers KPP non-local term in the case where KPP is re-computed.
458  o OpenAD  o OpenAD
459   - Adding preliminary ggl90 test to OpenAD verification.    - Adding preliminary ggl90 test to OpenAD verification.
460     Config. with ggl90 currently diverges after 64 time steps      Config. with ggl90 currently diverges after 64 time steps
461     so will need more work to become more stable      so will need more work to become more stable
462  o pkg/seaice:    - Adding preliminary kpp test to OpenAD verification.
463   - initialise deltaC in seaice_lsr, cosmetic changes in seaice_lsr      required small tweakes in kpp_routines.F
464   - add cpp-flag SEAICE_DELTA_SMOOTHREG for option of regularising    - Merge and update from Krishna Narayanan's contrib area:
465     delta with a smooth function in s/r seaice_calc_viscosity      * Add one variable for preliminary OpenAD DIVA
466     (no effect on EVP)      * Add replacement time-stepping for OpenAD DIVA
467   - rename local suffix "sqr" into "sq" for more consistent variable names      * genmake2 flag -diva (but only for OpenAD; preliminary)
468  o pkg/seaice: add new parameter SEAICE_deltaMin that is used ***only***      * required modifs for OAD_support
469    for regularizing Delta (and nothing else, like the parameter      successful preliminary test for tutorial_global_oce_biogeo/
470    which is also used for all sorts of things SEAICE_EPS). Defaults to  o pkg/seaice:
471    SEAICE_EPS for backward compatibility only.    - initialise deltaC in seaice_lsr, cosmetic changes in seaice_lsr
472      - add cpp-flag SEAICE_DELTA_SMOOTHREG for option of regularising
473        delta with a smooth function in s/r seaice_calc_viscosity
474        (no effect on EVP)
475      - rename local suffix "sqr" into "sq" for more consistent variable names
476    o pkg/seaice:
477        add new parameter SEAICE_deltaMin that is used ***only***
478        for regularizing Delta (and nothing else, like the parameter
479        which is also used for all sorts of things SEAICE_EPS).
480        Defaults to SEAICE_EPS for backward compatibility only.
481  o pkg/seaice: replace erroneously storing e12Csqr on the wrong tape with  o pkg/seaice: replace erroneously storing e12Csqr on the wrong tape with
482    the wrong key by inialising it before use -> fixes a recomputation      the wrong key by inialising it before use -> fixes a recomputation
483    problem but does not fix the gradient      problem but does not fix the gradient
484  o pkg/layers:  o pkg/layers:
485    - move resetting of flux arrays to outside the iLa loop    - move resetting of flux arrays to outside the iLa loop
486      (this caused layers_diapycnal to not work with more than one layer coord.)      (this caused layers_diapycnal to not work with more than one layer coord.)
# Line 32  o pkg/seaice: Line 492  o pkg/seaice:
492    - Rename SEAICE_VECTORIZE_LSR_ZEBRA to SEAICE_LSR_ZEBRA and define it    - Rename SEAICE_VECTORIZE_LSR_ZEBRA to SEAICE_LSR_ZEBRA and define it
493      in lab_sea forward experiment (changes results -> updated)      in lab_sea forward experiment (changes results -> updated)
494    - update adjoint experiment lab_sea after cleaning up seaice_lsr_tridiagu/v    - update adjoint experiment lab_sea after cleaning up seaice_lsr_tridiagu/v
495  o pkg/seaice: modify seaice_lsr.F in order to improve the gradient  o pkg/seaice: modify seaice_lsr.F in order to improve the gradient
496    computations; for SEAICE_VECTORIZE_LSR     computations; for SEAICE_VECTORIZE_LSR
497    - move the loops over which the tridiagonal solvers (seaice_lsr_tridiagu/v)    - move the loops over which the tridiagonal solvers (seaice_lsr_tridiagu/v)
498      sweep to the outside,      sweep to the outside,
499    - remove store directives and add "CADJ loop sequential" directives    - remove store directives and add "CADJ loop sequential" directives

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