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An Introduction to the Argo Data Sytem

An Introduction to the Argo Data Sytem. South Pacific Workshop 11 – 14 October 2005 Mark Ignaszewski FNMOC. Outline. Data system features Data system overview Available data Data access. Argo: A global collaboration. Participating countries: 20 Principle investigators: over 30

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An Introduction to the Argo Data Sytem

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  1. An Introduction to the Argo Data Sytem South Pacific Workshop 11 – 14 October 2005 Mark Ignaszewski FNMOC

  2. Outline • Data system features • Data system overview • Available data • Data access South Pacific Workshop 11-14 October 2005

  3. Argo: A global collaboration • Participating countries: 20 • Principle investigators: over 30 • National data centers: 9 • Float manufacturers: 6 Goal of the data system • Provide a globally consistent data set • Freely and easily available • Meet the needs of the operational (real-time) and research communities South Pacific Workshop 11-14 October 2005

  4. Data Consistency • Data are distributed in controlled formats • GTS data are in the TESAC code form • Server data are in standardized netCDF files • File format and data consistency are checked for every file before distribution • Standardized quality control procedures are used by all data providers • Meta-data for each float must be available before data for the float can be distributed South Pacific Workshop 11-14 October 2005

  5. Data Availability • Data is distributed on the GTS for operational centers • Two global data servers • One in France, the other in the US • Both servers offer open access to all data via • FTP • Web interfaces South Pacific Workshop 11-14 October 2005

  6. Communities Served Operational (real-time) community • Standard automated QC checks detect and flag bad data • Data available on GTS and on the global servers • Data are distributed within 24 hours of observation Research community • Standardized delayed-mode QC techniques have been developed to calibrate Argo data (primarily salinity) • data are available 6 months to 1 year after observation South Pacific Workshop 11-14 October 2005

  7. Within hours Data Assembly Centers GTS < 24 hrs 6 months -1 year < 24 hrs Principle Investigators < 24 hrs Global Data Assembly Centers > 1 year Regional Data Assembly Centers Data System Schematic Users • AIC • Notify coastal states of floats that might enter their EEZ • Clearinghouse for Argo information • www.argo.net • Encourage participation by new countries • Provide international coordination • DACs • Receive data from floats • Apply standardized automated QC checks • Insert data on the GTS • Submit data to the GDACs • Within 24 hours of observation • 9 DACs (currently) • Archive raw data • RDACs • Build high-quality reference datasets for their regions from all available data • for use in delayed-mode QC process • Perform basin-scale delayed-mode QC • Produce regional products based on Argo data • GADR • Permanently archive Argo data • “Register” data with data inventories • Provide data on hardcopy media for distribution • Provide data transformation and integration tools • NODC Argo Information Argo Information Center • PIs • Retrieve data from DACs • Perform standardized delayed-mode QC • Send delayed-mode data to the DACs • GDACs • Validate data format and consistency • Provide ftp and Web access to ALL users • 2 Global data centers (synchronized) • Official source of Argo data Global Argo Data Repository South Pacific Workshop 11-14 October 2005

  8. Argo Data Coverage 1 – 30 September 2005: 5981 Argo observations 2031 Active floats South Pacific Workshop 11-14 October 2005

  9. Combined Data Coverage South Pacific Workshop 11-14 October 2005

  10. Data: By Year Total Observations: 181,345 Delayed-mode QC: 24,769 South Pacific Workshop 11-14 October 2005

  11. Data Access: FTP • US GDAC: ftp://usgodae1.fnmoc.navy.mil/pub/outgoing/argo • French GDAC: ftp://ftp.ifremer.fr/ifremer/argo • Index files: “Index” of all files on the GDAC – text files • Includes additional information for easy searching (positions, times, etc) • 3 “views” • DAC view: float files as provided by the DACs (“dac” directory) • Geographic view: files arranged by basin (Atlantic, Pacific, Indian) and day of observation (“geo” directory) • Latest-data view: files arranged by day of receipt at the GDAC (“latest_data” directory) South Pacific Workshop 11-14 October 2005

  12. French GDAC www.coriolis.eu.org//cdc/argo.htm South Pacific Workshop 11-14 October 2005

  13. French GDAC www.coriolis.eu.org//cdc/argo.htm South Pacific Workshop 11-14 October 2005

  14. French GDAC: Data Selection Tool South Pacific Workshop 11-14 October 2005

  15. French GDAC www.coriolis.eu.org//cdc/argo.htm South Pacific Workshop 11-14 October 2005

  16. US GDAC: Web interface www.usgodae.org/argo/argo.html South Pacific Workshop 11-14 October 2005

  17. US GDAC: Argo Data Browser www.usgodae.org/argo/argo.html South Pacific Workshop 11-14 October 2005

  18. US GDAC: Argo Data Browser www.usgodae.org/argo/argo.html South Pacific Workshop 11-14 October 2005

  19. US GDAC: OPeNDAP www.usgodae.org/argo/argo.html OPeNDAP Functionality • Export to binary or ASCII • Subset • Subsample • Browse South Pacific Workshop 11-14 October 2005

  20. US GDAC: LAS www.usgodae.org/argo/argo.html • Select profile data by: • Time Period • Region • Depth Range • Additionally constrain by • Float ID • DAC • Real-Time/Delayed Mode • QC Values South Pacific Workshop 11-14 October 2005

  21. US GDAC: LAS LAS Gaussian Pie Comma Separated Metadata HTML Text Waterfall South Pacific Workshop 11-14 October 2005

  22. Important Addresses • AIC Entry Page: www.argo.net • Argo Project Office: www.argo.ucsd.edu • Argo Information Center: argo.jcommops.org • French GDAC: www.coriolis.eu.org/cdc/argo.htm • US GDAC: www.usgodae.org/argo/argo.html • Data Guide: www.coriolis.eu.org/cdc/argo/example/Argo_data_guide.pdf Please Provide Feedback! • Argo mailing list service: listes.cls.fr/wws/info/argo South Pacific Workshop 11-14 October 2005

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