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Ocean Modelling System at Noumea : status

CAIRNS 2005. ROMS AGRIF. Ocean Modelling System at Noumea : status. MERCATOR Assimilation System 2°. ECMWF 2°. Embedding LBC : U,V, T, S, SSH SBC : Heat & Water Flux Wind Stress. High resolution Regional Model (20km - 6km) with assimilation benefit from large scale

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Ocean Modelling System at Noumea : status

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  1. CAIRNS 2005 ROMS AGRIF Ocean Modelling System at Noumea : status MERCATOR Assimilation System 2° ECMWF 2° Embedding LBC : U,V, T, S, SSH SBC : Heat & Water Flux Wind Stress • High resolution Regional Model • (20km - 6km) with assimilation benefit from large scale • Best estimates for scientific purposes • Operational Forecasting modeling (prototype) with EEZ cover and applications like : • - Ressource survey • Fishing, Aquaculture ...

  2. CAIRNS 2005 Ocean Modelling System at Noumea: Computing environment Beowulf Cluster : dual-Opteron 246 10 processors Gigabit network OS : Fedora and OSCAR 4.0 (cluster deployment and managment) PGI and LAM 7.1 20 k€ 90% Open Source Flexibility and sufficient ressource for regional Modeling ie : 186x160x35 (1/10°) ~ 6hours / year Parallelized Model (MPI) at noumea Ocean Model Atmospheric Model ROMS (Operational) WRF (very soon) MARS3D (Ifremer, in work)

  3. CAIRNS 2005 Ocean Modelling System at Noumea: Model Validation • Data used for our regional model validation • Communauty data bank : • Aviso 1/3° DUACS • SST (TMI, NOAA) • WOCE • Regional and documeted data bank : • CARS 2000 (Many thanks, M. Dunn) • Local Data from our Ocean Analysis System : • XBT ship network • Coastal station around New Caledonia and Vanuatu (since 1999) • Some ADCP & CTD (IRD Cruises) • Argos • Others ? (Australian Ocean Analysis System, BlueLink, …)

  4. CAIRNS 2005 Ocean Modelling System at Noumea: Some Runs Offline Embedded with MERCATOR 2° Dynamic Height (cm) : Model Mean (97-05) vs CARS 2000 Depth = 150 m Model CARS Some work to adjust LBC settings good agreement between solution and CARS inside NC EEZ

  5. CAIRNS 2005 Ocean Modelling System at Noumea: Some Runs High resolution Run : New caledonia EEZ High resolution model and long-term coastal CTD from IRD network are well fitted.

  6. CAIRNS 2005 Ocean Modelling System at Noumea : work to do • Improving and testing the Regional Ocean Modelling System in reanalysis mode with : • - LBC from MERCATOR 1/4 ° (Assimilation benefit from large scale toward short scale without cost !) • SBC from a Regional Atmospheric System (WRF Model or Meteo-France Model) • ROMS tunning : Lateral boundary, initialisation … Testing the prototype of Ocean Forecasting System with feedback from reanalysis mode ROMS – WRF – MARS 3D coupling with objectives to improve estimates near coastal area : Offshore and lagoon ressource survey

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