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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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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 ...


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)


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, …)


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


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.


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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