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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: |
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modify lsr-algorithm so that it vectorizes AND converges by using a |
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"zebra" method: split vector loop into two with step size 2; this |
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solves a general convergence problem for the JFNK solver on a vector |
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computer. It has the potential to even improve convergence for |
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non-vector machines, but it does change the results so it is turned |
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off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and |
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SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h |
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checkpoint64e (2013/03/05) |
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o pkg/ecco and several verification experiments: |
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Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F |
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from ecco package, and revert to unified routine in model/src/ |
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Adjust verification experiments accordingly, especially gloal_oce_llc90 |
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Should conclude long-standing work by Gael to reconsile the_main_loop with |
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ECCO and will enable OpenAD's revolve loop in ECCO setup. |
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o pkg/generic_advdiff: |
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- implement compressible flow method for multi-dim advection (similar to |
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gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since |
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TAF generates many recomputations) to use it; no yet coded with implicit |
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vertical advection. |
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- change experiment advect_cs (new output) and advect_xy (same output) |
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to test compressible flow multi-dim advection. |
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o pkg/generic_advdiff: |
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- fix SOM advection for unusual cases (linear Free-Surf in r*, other |
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cases where linear Free-Surf is not @ k=1, e.g., useShelfIce) |
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o pkg/seaice: |
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- fix bug in the no-slip implementation in seaice_calc_strainrates.F, this |
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bug affects two verification experiments (lab_sea and lab_sea.hb87), |
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recover old (wrong) results by setting noSlipFac = 2. in |
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seaice_calc_strainrates.F; |
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- add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0 |
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- add runtime parameter SEAICE_JFNKepsilon for that finite difference |
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gradient in the Jacobian times vector operation (s/r seaice_jacvec) |
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- fix line search in seaice_jfnk.F (s/r seaice_jfnk_update) |
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o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code: |
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- new subroutines seaice_lsr_tridiagu/v |
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- introduce loop bounds i/jmin/max to be able to use a restricted |
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additive Schwarz method, but not used for now. |
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- rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS |
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- use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner |
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o OpenAD support |
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Reorganize S/R call for overall time-stepping loop to facilitate |
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OpenAD revolve loop replacement |
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(new S/R main_do_loop.F) |
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o model/src: |
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- add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3; |
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- pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R |
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ADAMS_BASHFORTH2. |
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o pkg/cheapaml: |
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- add new parameter (default=F, same as before) to disable full domain |
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(including land) periodicity in X & Y dir. |
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- new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of |
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prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer |
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into single S/R CHEAPAML_TIMESTEP. |
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checkpoint64d (2013/02/17) |
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o pkg/monitor (angular momentum): |
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- do not add Eta contribution to the total AM if using rigid-lid; |
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- correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta). |
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- horizontal discretisation: compute Zonal wind contribution separately for |
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each component (instead of from cell centered averaged) and use the 4 |
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grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part. |
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- Check that AM is conserved with linear dynamics (momAdvection=F and linear |
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FreeSurf) if using vectorInvariant momentum. |
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o model/src (horizontal grid): |
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- move initialisation of all horizontal grid arrays to null value |
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from specific horizontal grid S/R to main S/R INI_GRID; |
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- add 2 new arrays to project model C-grid velocity on to zonal direction |
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(similar to AngleCosC & -AngleSinC but at U and V point location) and |
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compute them in S/R CALC_GRID_ANGLES. |
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o pkg/seaice: replace a hard coded parameter by a runtime parameter |
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SEAICE_JFNK_tolIter |
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o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in |
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preconditioner for JFNK (run LSR into the overlaps as far as possible, |
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i.e OLx/y-2, but overwrite the solution in the overlaps) |
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- extend loop range in seaice_calc_viscosity |
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- add new parameters SEAICE_OLx/y (default = OLx/y-2) |
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- add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs |
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- slightly modify loops in tridiagonal solver lsr-preconditioner |
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- by default remove the extra exchange in seaice_preconditioner with a |
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replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE |
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- modify offline_exf_seaice so that old results without RAS are reproduced |
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for output.dyn_jfnk.txt |
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in seaice_fgmres.F (unrelated to RAS) |
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- add a cpp-flag option for a re-ordered mapping (potentially more |
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efficient), but because this changes the results, turn it off by |
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default |
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- replace the save statement by local common blocks |
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o utils/matlab: |
o utils/matlab: |
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- fix tile-offset in rdmnc.m when output was produced using EXCH2. |
- fix tile-offset in rdmnc.m when output was produced using EXCH2. |
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- update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab) |
- update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab) |
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