Public documentation about CORA dataset for users.
- 1 Data sources of CORA
- 2 Quality Flags meaning
- 3 Distributed products
- 4 Files Format
- 5 User access
- 6 CORA versions
- 7 FAQ
- 8 Acknowledgement
- 9 Contact
- 10 See also
- 11 References
Data sources of CORA
CORA dataset is an extraction of the CORIOLIS database at a given date. CORIOLIS database receive oceanographic (physical and chimical) real-time data from global observatories network and delayed-time data from various institutes/consortiums.
- Argo profilers data come from 
- OceanSites buoys and moorings data (TAO-TRITON-PIRATA-RAMA moored buoys) come from 
- EGO gliders network
- GTSPP surface drifters and thermosalinographs network from 
Delayed time data
Coriolis database also retreives delayed time dataset when they are available:
- US NODC (OCL CTDs)
- CIEM (ICES CTDs)
- SeaSurfaceSalinity labelised observatory system for salinographs data
- MEMO labelised observatory system for sea mamals data
Quality Flags meaning
|0||No Quality Check was performed|
|2||Probably good data|
|3||Bad data that are potentially correctable|
- raw data organized in year subdirectories and files sorted per date and per type of file on observation levels + an index permitting quick browsing (CO_DMQCGL01_19930101_PR_XB.nc) also archived per year in .tar or .tar.gz files
- gridded fields (longitude = 720 ;latitude = 545 ;depth = 152 ) created by analysis at the end of the validation process (ex: ARGLV6.1_19930215_fld_TEMP.nc) also archived per year in .tar.gz files
- standardized data sorted per parameter and per month on standard levels (0-2000m 152 levels) (ex: ARGLV6.1_19920115_dat_PSAL.nc) also archived per year in .tar.gz files
Each year of the CORA dataset is stored in a subdirectory YYYY (ex: 2011).
Files are sorted by date and by data type: CO_DMQCGL01_YYYYMMDD_PR_TT.nc (ex: CO_DMQCGL01_20111011_PR_PF.nc)
||type of data depending of sensor/platform/source||Comments|
|XB||XBT (expendable bathythermograph) high resolution from research vessels||XBT data are also present in TE and BA files|
|BA||data received from the BATHY channel||low resolution data from GTS|
|TE||data received from the TESAC data flow||Low resolution data from GTS|
|OC||US NODC data|| |
|PF||argo profiler data||real-time and delayed-mode (adjusted by Principals Investigators) profiles|
|HF||High Frequency data coming from coastal moored buoys (max 3 levels of immersion, <200m, <0.01° of variation in latitude and longitude, more than one measure per day on at least 10 days in a year)||This category concerns about 300 moorings in CORA.|
|CT||CTD data coming from oceanographic vessels or sea mamals or submarine gliders|| |
|MO||TAO, TRITON, PIRATA moorings data|| |
|Data type||Files type||Temperature accuracy||Salinity accuracy||Pressure/Depth accuracy|
|XBT||XB, BA, TE||0.03-0.01°C||
|CTD||OC, TE ,BA, CT||0.001-0.005°C||0.02-0.003µS cm-1||0.015-0.08%|
|XCTD||BA, TE, OC, XB, CT||0.02°C||0.05-0.08µS cm-1||2%|
|Argo Floats||PF, TE||0.01°C||0.01µS cm-1||2.4db|
|TAO/TRITON/PIRATA/RAMA||TE, MO, BA||*Standard ATLAS: 0.003-0.03°C (SST) 0.003-0.09°C (subsurface) *Next Gen. ATLAS 0.003-0.02°C||0.02µS cm-1||1db|
|Gliders||CT, TE||0.001-0.005°C||0.02-0.003µS cm-1||N/A|
|Sea mammals||TE , CT||0.01°c||0.02µS cm-1||N/A|
|Drifting buoys||TE, BA||0.002-0.01°C||0.003-0.01µS cm-1|| |
|Coastal and other moorings||TE, BA||Nominal 1°C (Achieved 0.08°C)||0.001µS cm-1|
Main contact: firstname.lastname@example.org
access via MyOcean
The dataset is available on request through MyOcean Service Desk ( registration ) You can also view and download gridded fields without request. Redirected to THREDDS
require login and password, ask email@example.com ftp CORA
access via THREDDS
access via OceanDataView website
CORA dataset in OceanDataView format available here: ODV dataset soon
Current CORA dataset version is CORA3.2 released in december 2011.
||Date of release||Time span||Comments|
|CORA1.0||2007||1990-2005||Beta version of the dataset, full years extracted|
|CORA2.2||2009||1990-2008||Add of validation procedures (climatological checks) and gridding of the data|
|CORA3.2||2011||1990-2010||Add of validation procedures (duplicate check, XBT depth correction) integration of sea mammals data, automatisation of the update procedure|
|CORA3.3||beginning of 2012||1990-2011||OceanScience] review, add of year 2011, completion of anomalies feedback from Objective analysis towards CORA dataset and Coriolis database.|
|CORA4.0||april 2013||1990-2012||add ICES CTD since 1970, integration of time-series of moorings in MyOcean] NetCDF format, update of the whole years|
|CORA4.1||end 2013||1990-2012||full MyOcean NetCDF format release integrating historical data from SeaDataNet<ref>http://www.seadatanet.org/</ref> project|
How to know if a profile is an XBT?
Use the WMO_INST_TYPE variable and compare the value to a table like WMO table. Or use the variable PROBE_TYPE in monthly index files.
How to use julian date?
What to do if I spot anomalies in the netCDF files?
Does CORA include data anterior to 1990?
Not yet but it is not excluded in a future release since coriolis databse has data up to 1961.
How to make a reference to CORA dataset?
CORA dataset will have a DOI code soon but if you work with our dataset referre to this article: doi:10.5194/osd-9-1273-2012 C. Cabanes et al. The CORA dataset
CORA dataset is produced by Research and Development cell of CORIOLIS project in cooperation with the French CORIOLIS data-center hosted by Ifremer institute.
- Gilles Reverdin in charge of the scientific prospectives of the team
- Sylvie Pouliquen head of MyOcean<ref>http://www.myocean.eu/</ref> and Coriolis project, manager of the team for operational issues
- Clément de Boyer Montegut doctor in oceanography in charge of the promotion and research part of the project
- Antoine Grouazel engineer in charge of the data processing, collecting new data for Coriolis database and developing algorithm to validate the data.
- Florian Kokosczka doctor
- Cécile Cabanes doctor main author of CORA article and principal investigator for the first release of CORA dataset.