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Last news !!!

Par ecola — Dernière modification 20/10/2012 21:28
new news and older ones...


  • S2 atmospheric forcing at work, reduces errors by a factor 2
  • PASTIX solver now available, nearly as fast as UMFPACK, much more robust


  • HIPS parallel solver operational for the time-stepping simulation, benchmarks in progress


  • most recent/trusted global tidal atlases now available on a common netcdf format at the project's FTP site


  • altimeter data analysis and data assimilation softwares are now OpenMP optimized !


  • diagnostics of tidal analysis contamination by ocean circulation computed from Mercator SSH re-analysis (GLORYS-v2)


  • improved non-linear spectral tides simulation now available (advection scheme and loading contribution re-visited


  • actual tidal wavelength determination software now available (to provide appropriate inputs to the filtering of  along-track harmonic constants)


  • latitude-dependent gravitational constant implemented (following a C. Perigaud suggestion), 10% accuracy improvement for M2 hydrodynamic solution !!!


  • a new, fast,  global ocean 2D field filtering software has been completed, needed for GLORYS-v2 harmonic  analysis pre-processing and tidale loading/self-atttraction effects investigations
  • K1 improvements obtained in TPN and J1N time series harmonic analysis by correcting  semi-annual ocean circulation signal from GLORYS analysis (Gulf of Tonkin)


  • linear/quadratic bottom friction refurbished, testing in progress


  • GLORYS annual and semi-annual harmonic analysis smoothed (400 km), ready for ERS/Envisat and TPN/J1N tests (see ftp site at LEGOS)


  • internal tide wavelength computation (from vertical normal modes) now available in COMODO-TOOLS



  • SpEnOI (basin-wide) decorrelation software under test and data assimilation computational load assessment in progress
  • Development of a new altimetry data decimation software to extract data for assimilation


  • Exploration of internal wave drag parameters:
    • empirical Brünt-Vaissala frequency from vertical eigen-mode computations (using WOA2005)
    • Tidal excursion tuning experiments (tidal frequency-dependent, internal tide celerity dependent etc...)


  • Hydrodynamic simulation improvements achieved (mesh refinement, bathymetry upgrades, critical latitude shut-off of internal wave drag reworked), solution accuracy below 1.8 cm for M2 tide in deep ocean
  • Loading and self-attraction (potential) software under developments in collaboration with M. Llubes


  • Extended non-linear iteration sequence under developments to improve coastal solutions
  • Altimetry dataset now available, first realistic data assimilation in progress
  • BPR and tide gauge timeseries reprocessed for in situ validation (ROSAME, GLOUPS, ACCLAIM, DARTS, GLOSS, SONEL)


  • Hydrodynamic simulation improvements achieved by minimizing Hudson Bay friction, solution accuracy is now 1.3 cm for M2 tide in deep ocean
  • Hudson Strait and Bay regional model set up to examine friction issue (L. Chevalier, D. Greenberg)


  • Loading and self-attraction (potential) software available, validation in progress
  • Preparation for FES201(3/4) future configuration (mostly mesh refinement and shorelines re-sampling)
  • Hydrodynamic atlas delivered to the "Tidal models inter-comparison project", D. Stammer, Uni. of Hamburg


  • Barotropic/baroclinic energy conversion rate from FES2012 hydrodynamic atlas delivered to the Drakkar project, B. Barnier, LEGI, Grenoble


  • SpEnOI light mode added (full solution reconstruction skipped, direct diagnostic available for validation data ) to ease assimilation parameters/dataset exploration
  • First FES2012 temporary atlas achieved


  • SpEnOI light mode added (full solution reconstruction skipped, direct diagnostic available for validation data ) to ease assimilation parameters/dataset exploration
  • data assimilation tuning in progress:
    • improved prior solutions
    • model error covariance scale factor and de-correlation distance exploration
    • data set extension


  • FES2012 atlas first official release to project consortium


  • FES2012 atlas presented at the 20YPRA symposium in Venice

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