CAIRNS 2005
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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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Ocean Modelling System at Noumea : status

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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

  • Best estimates for scientific purposes

  • Operational Forecasting modeling (prototype) with EEZ cover and applications like :

  • - Ressource survey

  • Fishing, Aquaculture ...


Ocean modelling system at noumea status

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)


Ocean modelling system at noumea status

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, …)


Ocean modelling system at noumea status

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


Ocean modelling system at noumea status

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.


Ocean modelling system at noumea status

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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