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Published byJoseph Stokes Modified over 9 years ago
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FES 2012 4th PROJECT MEETING… F. Lyard, L. Roblou, D. Allain
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Status and actions : T-UGOm Developments Latitude-dependent g Full non-linear solver tests Linear/quadratic friction NCP1xLGP2 & NCP1xLGP2 time stepping optimisation Loading/self-attraction software Computing performances 10 Go O(2h) 2 simulations/blade (2 cores, 8 in OpenMP sections)
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Status : EnOI Developments Code refurbished Netcdf formats IO, DNP1xLGP2 discretisation OpenMP optimized Members decorrelation implementation Quick diagnostic mode Computing performances 30 Go (elevation only) O(20h) Additional LEGOS computing facilities needed
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Actions T-UGOm developments continue Assimilation Data selection/decimation Validation database (tide gauge): time series re-analysis outliers removal redundancy removal split in 4 specific databases: open ocean shelf seas coastal seas ultra-coastal zones (estuarines, etc…)
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Tide gauge validation database Linked with Stammer inter- comparison project Retreated data: Deep ocean: DARTS, ACCALAIM, GLOUPS Shelf Seas: ROSAME, GLOUPS Coastal Seas: GLOSS, SONEL, BODC shelf gaugesdeep gauges coastal gauges
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FES2012 accuracy limiting factors Bathymetry ETOPO-1 was a bad choice Updated from Smith&Sandwell-v14 Lack of resolution ? limited by project computational facilities not sufficient in some places Linear/non-linear friction ? Spectral solver limitations Loading/self-attraction precision/accuracy
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Bathymetry Patching still underway (version 25) Atlantic anomaly too much energy dissipated in Hudson Strait and Bay Ungava Bay bathymetry issue: local M2 resonance spectral solver limitation ? regional model study underway
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Resolution reworking faulty mesh correction resolution increase FES2012
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Loading self-attraction Muriel Lubes, Damien Allain
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Latest experiments State of the art FES2012FES2013 M224 / 9313 / 53 S210 / 289 / 22 K111 / 3010 / 23 O112 / 307 / 19 FES2012 referenceJune 2012 comparisons against TP/J1/J2 (deep / shelf)
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FES2013 ? Many new softwares and approaches have been developped but not fully deployed in FES2012… Accuracy in shelf/high latitude seas is the true challenge Much better prior solutions bathymetry T-UGOm improvements increased resolution on shelf breaks and ridges … Enhanced ensemble members capitalize on FES2012 experience improved de-correlation techniques (singular values threshold) Improved data: CTOH coastal data assimilation GLORYS correction extension
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