Ocean Modelling System at Noumea : status

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Presentation transcript:

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 ...

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)

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, …)

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 1992 - 2005 185 x159x35 1/6 ° MiniPog 2° assimilation 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 2005 Ocean Modelling System at Noumea : Some Runs 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 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