1. Ocean Modelling System at Noumea : status
CAIRNS 2005
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
ROMS AGRIF
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. Ocean Modelling System at Noumea : Computing environment
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. Ocean Modelling System at Noumea : Model Validation
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. Ocean Modelling System at Noumea : Some Runs
CAIRNS 2005
Ocean Modelling System at Noumea : Some Runs
Offline Embedded with MERCATOR 2°
Name
Years
Grid
LBC
SBC : Wind
SBC : Heat Flux
Topo
ZEE_
RUN2
185 x159x35
1/6 °
MiniPog 2°
assimilation
ECMWF 2°
weekly
Gtopo30
Dynamic Height (cm) : Model Mean (97-05) vs CARS Depth = 150 m
Model
CARS
Some work to adjust LBC settings
good agreement between solution and CARS inside NC EEZ

5. Ocean Modelling System at Noumea : Some Runs
CAIRNS 2005
Ocean Modelling System at Noumea : Some Runs
High resolution Run : New caledonia EEZ
Name
ZOOM_ZEE
Years
Grid
208 x209x 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.

6. Ocean Modelling System at Noumea : work to do
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