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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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slide1
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 ...
slide2
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)

slide3
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, …)
slide4
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

slide5
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.

slide6
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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