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Notes on tags used in MITgcmUV |
Notes on tags used in MITgcmUV |
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============================== |
============================== |
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o pkg/seaice/seaice_evp.F: introduce "adaptive EVP" by Madlen Kimmritz |
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- this is an intermediate state of a truely converging EVP that has |
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the potential of outperforming implicit VP methods, I do not recommend |
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using it yet. |
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- for now, "adaptive EVP" is turned on by setting SEAICE_EVP_USE_ADAPTATION |
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and all parameters are hardwired |
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- for convergence it still requires very smooth regularisations, that means, |
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if SEAICE_DELTA_SMOOTHREG is defined, deltaCreg=deltaC+deltaMin, which is |
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different from the VP case with deltaCreg=sqrt(deltaC**2+deltaMin**2); also |
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specific averaging appears to be required, still subject to tuning |
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- still needs cleaning and I need to turn parameter into runtime parameters |
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- add code to compute and print residuals of iteration, compile with |
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defining ALLOW_SEAICE_EVP_RESIDUAL to enable it |
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o pkg/seaice/seaice_evp.F: fix a bug (factor of four in front of e12Csq) |
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that entered with r1.54 on Sep04, 2015, -> update results |
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checkpoint65o (2015/09/14) |
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o pkg/mom_vecinv & mom_common: |
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- add deep-atmosphere geometry factor in mom_calc_visc.F + in routines |
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called from there. |
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- add anelastic and deep-atmosphere geometry factor in pkg/mom_vecinv ; this |
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allows to use Vector-Invariant form in deep atmos and anelastic formulation |
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o pkg/seaice: introduce fast ice parameterisation following Itkin et al. (2015) |
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and Koenig-Beatty+Holland (2012) |
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- two new parameters SEAICE_tensilFac and SEAICE_tensilDepth |
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- global 2D field tensileStrength, computed in seaice_calc_ice_strength |
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- requires an extra input argument for S/R seaice_calc_viscosities |
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- tensileStrength's depth dependence is different from Itkin et al. (2015) |
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(to be changed and played with, for now exponential) |
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o pkg/seaice: introduce new parameter SEAICEscaleSurfStress (default = .FALSE.) |
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- if TRUE scale ice-ocean and ice-atmosphere stress acting on sea ice |
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by AREA according to Connelly et al. (2004), JPO. |
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- For EVP and the LSR solver, the implicit part of the drag term is |
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the only non-zero term in the denominator when there is no ice (which |
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prevented running the model with zero ice-ocean drag). If |
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SEAICEscaleSurfStress = .TRUE., this results in a division by zero |
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(or zero main diagonals BU/BV) which need to be caught. A practical |
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consequence is that for open water, the momentum equation reduce |
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to trivially 0 = 0 + 0 (for EVP). For LSR, BU/BV are reset to 1, if |
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they happen to be zero, often leading to a non-zero solution over |
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open water. |
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o pkg/seaice: revise EVP code (seaice_evp.F) in preparation for a more |
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efficient EVP method. |
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- introduce area-weighted averages for e12 (analogously to |
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seaice_calc_viscosities.F); this totally changes lab_sea.hb87 (2 digits |
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remain, but also changing the order of terms in the previous average |
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changed the results as much) -> update experiment |
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- add SEAICE_DELTA_SMOOTHREG code |
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- disentangle computation of zetaC/deltaC and zetaZ/deltaZ, also for |
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TEM-code |
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- adjust loop bounds so that only required fields are computed |
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- add new averaging code for zetaZ/deltaZ (again similar to |
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seaice_calc_viscosities.F), inactive by default for now (will change |
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results again), but will replace old code eventually |
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o eesupp/src: |
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- add an other alternative for multi-proc GLOBAL_SUM (in global_sum_tile.F) |
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to always cumulate tile local-sum in the same order |
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(option #define GLOBAL_SUM_ORDER_TILES in CPP_EEOPTIONS.h). |
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Still uses MPI_Allreduce (like standard code) but on array of tiles |
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and should be faster than GLOBAL_SUM_SEND_RECV code. |
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- switch almost all verification experiments that use GLOBAL_SUM_SEND_RECV |
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(defined in CPP_EEOPTIONS.h_mpi) to GLOBAL_SUM_ORDER_TILES instead. |
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- add CPP_EEOPTIONS.h_mpi with GLOBAL_SUM_ORDER_TILES defined in 14 more exp.: |
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aim.5l_cs, cheapAML_box, deep_anelastic, dome, fizhi-cs-32x32x40, |
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fizhi-cs-aqualev20, fizhi-gridalt-hs, global_ocean_ebm, matrix_example, |
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natl_box, solid-body.cs-32x32x1, tutorial_advection_in_gyre, |
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tutorial_baroclinic_gyre and tutorial_held_suarez_cs. |
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checkpoint65n (2015/07/29) |
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o pkg/thsice: |
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- add a warning when used with pkg/aim but without updating SST |
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(stepFwd_oceMxL=F & useCoupler=F & tauRelax_MxL<>-1 ). |
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o pkg/offline: |
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- change where Offline-Fields are loaded, from load_fields_driver.F to |
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directly within FORWARD_STEP, just after updating iter number and time; |
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- move setting of GM and KPP diffusivity out of OFFLINE_FIELDS_LOAD into new |
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S/R OFFLINE_GET_DIFFUS that is called towards the end of DO_OCEANIC_PHYS; |
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These changes allow: |
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a) to recover exactly on-line results using deltaToffline=deltaTClock, |
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tested (using offlineIter0= nIter0 -1 and offlineTimeOffset= -deltaT/2) |
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both with Lin & Non-Lin Free-Surf, both with staggerTimeStep & synchronous |
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time-step, both with GM & KPP files and with recomputing these fields; |
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b) no needs to switch on staggerTimeStep anymore; |
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c) simplify rescaling of offline horiz. velocity with Non-Lin Free-Surf. |
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- update output of experiment tutorial_dic_adjoffline (only 3 digits left). |
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o pkg/offline: |
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- change (rarely used) offset-iteration parameter to an offset time (in s): |
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can easily recover previous offset-iter effect by setting offset-time |
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(offlineTimeOffset) to offset-iter x deltaToffline; |
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- do not turn-off Temp & Salinity surface relaxation when using KPP (used |
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in KPP as part of surface buoyancy forcing) in offline run. |
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- fix ptracers KPP non-local term in the case where KPP is re-computed. |
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o OpenAD |
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- Adding preliminary ggl90 test to OpenAD verification. |
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Config. with ggl90 currently diverges after 64 time steps |
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so will need more work to become more stable |
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- Adding preliminary kpp test to OpenAD verification. |
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required small tweakes in kpp_routines.F |
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- Merge and update from Krishna Narayanan's contrib area: |
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* Add one variable for preliminary OpenAD DIVA |
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* Add replacement time-stepping for OpenAD DIVA |
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* genmake2 flag -diva (but only for OpenAD; preliminary) |
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* required modifs for OAD_support |
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successful preliminary test for tutorial_global_oce_biogeo/ |
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o pkg/seaice: |
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- initialise deltaC in seaice_lsr, cosmetic changes in seaice_lsr |
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- add cpp-flag SEAICE_DELTA_SMOOTHREG for option of regularising |
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delta with a smooth function in s/r seaice_calc_viscosity |
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(no effect on EVP) |
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- rename local suffix "sqr" into "sq" for more consistent variable names |
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o pkg/seaice: |
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add new parameter SEAICE_deltaMin that is used ***only*** |
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for regularizing Delta (and nothing else, like the parameter |
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which is also used for all sorts of things SEAICE_EPS). |
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Defaults to SEAICE_EPS for backward compatibility only. |
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o pkg/seaice: replace erroneously storing e12Csqr on the wrong tape with |
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the wrong key by inialising it before use -> fixes a recomputation |
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problem but does not fix the gradient |
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o pkg/layers: |
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- move resetting of flux arrays to outside the iLa loop |
| 127 |
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(this caused layers_diapycnal to not work with more than one layer coord.) |
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- fix bug in calculation of layers_recip_delta in layers_init_fixed.F |
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o pkg/layers: |
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- remove from common block 3D layers fields (used to diagnose transport |
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in tracer coords) and declare them as local arrays in layers_calc.F |
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o pkg/seaice: |
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- Rename SEAICE_VECTORIZE_LSR_ZEBRA to SEAICE_LSR_ZEBRA and define it |
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in lab_sea forward experiment (changes results -> updated) |
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- update adjoint experiment lab_sea after cleaning up seaice_lsr_tridiagu/v |
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o pkg/seaice: modify seaice_lsr.F in order to improve the gradient |
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computations; for SEAICE_VECTORIZE_LSR |
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- move the loops over which the tridiagonal solvers (seaice_lsr_tridiagu/v) |
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sweep to the outside, |
| 140 |
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- remove store directives and add "CADJ loop sequential" directives |
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in analogy to model/src/solve_tridiagonal.F |
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- replace many "#ifdef SEAICE_VECTORIZE_LSR_ZEBRA" by variable loop |
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boundaries to yield more readable code. This has also the charming side |
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effect that your can use SEAICE_VECTORIZE_LSR_ZEBRA without |
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SEAICE_VECTORIZE_LSR (i.e. adjoint without recomputations in |
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seaice_lsr_tridiagu/v now requires either of these flags, vectorization |
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still requires SEAICE_VECTORIZE_LSR with SEAICE_VECTORIZE_LSR_ZEBRA as |
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an additional option) |
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The tridiagonal solvers are now completely analoguous to solve_tridiagonal.F |
| 150 |
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but the adjoint gradients (which are affected by this change) still explode. |
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o coupler (atm & ocn _compon_interf): |
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- avoid using Exch2 IO mapping if not suitable. |
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|
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checkpoint65m (2015/06/15) |
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o pkg/layers: |
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- clean-up old parameters setting (from Sep 2012): |
| 157 |
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+ remove old parameters setting from common block (declared locally); |
| 158 |
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+ stop if any old parameter is mixed with new parameters; |
| 159 |
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+ check for valid or consistent parameter setting (e.g., layers_name) |
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- check that layers_bounds for Pot.Density are in the right range; |
| 161 |
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this is supposed to catch un-updated setting after recently shifting |
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potential density field "prho" by -1000 (now in "sigma" scale). |
| 163 |
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o pkg/layers: |
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- Added missing call to layers_fill for keeping track of tottend in |
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pkg/diagnostics/diagnostics_fill_state.F |
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o pkg/layers: |
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- added CPP flux LAYERS_FINEGRID_DIAPYCNAL to disable fine-grid binning |
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of diapycnal fluxes |
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o pkg/layers: |
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- reverted changes to interpolation to previous treatment; there |
| 171 |
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was never actually a problem |
| 172 |
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o pkg/layers: |
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- fix interpolation of layers tracers in the presence of partial cells |
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- add lots of new functionality to compute water mass transformation |
| 175 |
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(enabled by CPP flag LAYERS_THERMODYNAMICS) |
| 176 |
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- add new calls from main code (diags_oceanic_surf_flux.F, |
| 177 |
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thermodynamics.F, impldiff.F) and gad to save the necessary fields |
| 178 |
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for layers_thermodynamics calculations |
| 179 |
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o pkg/ptracers: |
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- add capability of stepping a passive tracer forward without advection |
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by setting PTRACERS_advScheme to 0. |
| 182 |
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o pkg/diagnostics: |
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- add few (threads) _BARRIER around any update of "diag_pkgStatus". |
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o pkg/layers: |
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- shift potential density field "prho" by -1000 for density layer averaging so |
| 186 |
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that it corresponds to usual "sigma" definition (i.e., rho(p=const)-1000); |
| 187 |
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Note that density bin boundaries (layers_bounds in data.layers) have |
| 188 |
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to be set accordingly (i.e., shifted, in sigma scale). |
| 189 |
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o pkg/layers: |
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- fix snap-shot output of layer thickness @ V.pt and output of pot.density |
| 191 |
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- fix calculation of layer non-weighted velocity and layer probability |
| 192 |
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- add diagnostics for pot.density used for layer averaging |
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o pkg/seaice: |
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- seaice_calc_viscosity.F: change computation of deltaC**2 to ensure |
| 195 |
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positiveness, modify a few comments and improve variable names, |
| 196 |
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- the changed computation of deltaC affects most seaice-related |
| 197 |
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experiments at the truncation level. |
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seaice_itd.thermo is affected by far the most, with |
| 199 |
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only 7 digits of agreement remaining; update experiments. |
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|
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checkpoint65l (2015/05/04) |
checkpoint65l (2015/05/04) |
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o pkg/shelfice: |
o pkg/shelfice: |
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- in shelfice_thermodynamics.F, if SHELFICEBoundaryLayer=.true., then set |
- in shelfice_thermodynamics.F, if SHELFICEBoundaryLayer=.true., then set |
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