Data useful to operational oceanography are obtained by diverse means including in-situ platforms (ships, drifters, floats, moorings, etc) and satellites. They come in very different forms, from a single variable measured at a single point to multivariate four dimensional collections of data that represent data volumes from a few bytes to gigabytes. In past 10 years, we have seen the emergence of assembly centres that:
- integrate data coming from a wide variety of platforms and providers (scientists, national data centres, satellite data centres and operational agencies),
- get enough information from the originators to be able to know exactly how the data have been acquired and processed (documented and commonly agreed QC procedures, history of the processing),
- distribute data and meta-data in agreed standardized formats (speaking the same language).
Coriolis, one of these Data Assembly Centers, has originally been designed to provide the French ocean forecasting centers, MERCATOR-Océan and French Hydrographic Service (SHOM), with real-time qualified and integrated products, for assimilation and validation purposes. With the advent of re-analysed products, such as CORA , Coriolis is also able to serve the research community.
Coriolis is organised to produce global integrated products. It has developed partnerships with the JCOMM (Joint Commission WMO-IOC) Observations Panel Area (OPA) components in particular with Argo, GOSUD and OceanSites and with the Operational community represented in Europe by the FP7 MyOcean project that sets up and operates the GMES Marine Core Service.
- Coriolis data service provides quality-controlled in-situ data in real-time and delayed modes. Managed data sets are mainly T-S profiles and time series from profiling floats, XBT's, thermo-salinographs, drifting and moored buoys. Corilis is progressivly integrated other parameters such as sea level from European real-time tide gages, and ecosystem data ( oxygen, chlorophyll and nutrients) from ferrybox , mooring and gliders.
- Data transmitted by floats are processed, checked for quality and distributed to the GTS and Internet with minimum delay (24 h).
- Click here for Coriolis data flow.Coriolis data centre is operated by Sismer.
- The service is a gateway to global data centers ( Argo, OceanSites, Gosud) . The centre is the in situ data provider for the Mercator data assimilation project as well as the European Operational Oceanography MyOcean project.
- The data service works in close association with a scientific team to define procedures for data validation, quality control, formats and products.
Caveat from Argo International Steering Team
Argo near real-time data is subject to only coarse fully-automated quality control checks. No QC is done on oxygen measurement at present.
Argo delayed-mode procedures for checking sensor drifts and offsets in salinity rely on a statistical comparison of the float data with reference data. An adjustment is made when the float PI judges that it will improve the quality of the dataset. Users should include the supplied error estimates in their usage of Argo delayed-mode salinity data.
For both near real-time and delayed mode data, proper and appropriate use is the responsibility of the user.