Ocean Modelling System at Noumea : status

ROMS AGRIF

MERCATOR Assimilation System 2°

ECMWF 2°

EmbeddingLBC : U,V, T, S, SSHSBC : 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 2005CAIRNS 2005

CAIRNS 2005CAIRNS 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 ModelROMS (Operational) WRF (very soon)MARS3D (Ifremer, in work)

CAIRNS 2005CAIRNS 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 2005CAIRNS 2005 Ocean Modelling System at Noumea : Some RunsOffline Embedded with MERCATOR 2°

Name Years Grid LBC SBC : Wind SBC : Heat Flux Topo

ZEE_RUN2

1992 - 2005 185 x159x351/6 °

MiniPog 2° assimilation

ECMWF 2°weekly

ECMWF 2°weekly

Gtopo30

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 : Some Runs

CAIRNS 2005CAIRNS 2005

High resolution Run : New caledonia EEZ

Name ZOOM_ZEE

Years 1999 - 2004

Grid 208 x209x35 6 km

LBC ROMS : ZEE_RUN 2 with assimilation benefit from Mercator

SBC : Wind ERS / Quickscat 1/4° daily

SBC : Heat Flux

ECMWF 2°weekly

Topo Gtopo30

Objectives Nearshore features and upwelling variability

High resolution model and long-term coastal CTD from IRD network are well fitted.

Ocean Modelling System at Noumea : work to doCAIRNS 2005CAIRNS 2005

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