1 / 25

CERSAT A facility for operational oceanography Jean-François Piollé et al.

CERSAT A facility for operational oceanography Jean-François Piollé et al. http://www.ifremer.fr/cersat Help desk : fpaf@ifremer.fr. CERSAT : background. Satellite data center of IFREMER

delora
Download Presentation

CERSAT A facility for operational oceanography Jean-François Piollé et al.

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CERSAT A facility for operational oceanography Jean-François Piollé et al. http://www.ifremer.fr/cersat Help desk : fpaf@ifremer.fr Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  2. CERSAT : background • Satellite data center of IFREMER • Funded by ESA since 1991 as part of ERS-1/ERS-2 ground segment (archiving/processing of onboard AMI wind/wave mode, altimeter, ATSR/microwave sounder) • Conduct R&D activities • Remote-sensing : defining/improving algorithms to retrieve the geophysical/biochemical parameters (wind, wave, sea-ice, salinity, rain, chlorophyll, suspended matters), sensor calibration/validation and monitoring,… • Value-added products : fluxes, forcing fields with improved spatial/temporal resolution using geostatistical methods, data source merging/combination (satellite/model/in situ) • Quality assessment of the produced data • Tools to easier and promote usage of satellite data (browsers, dissemination tools,…) • Operational activities • Processing/dissemination of delayed-mode to real-time data Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  3. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level CERSAT products : adressing various user needs and communities • Started with level 2 swath data (ERS and other sensors) • Remote-sensing research, cal/val activities,… • Can serve a wide range of needs but not always convenient (data volume, sensor patterns,…) • Developping synoptic products • Gap free, fix grid, small volume, long-time series • Wider range of users, forcing fields • Higher resolution, local sensor calibration • Specific regional products • New derived quantities • New communities : biogeochemical studies • Sensor merging • Improved temporal/spatial resolution and inversion algorithms • Derived quantities by sensor combination : fluxes,… • Toward real-time • Serving operational oceanography • Model assimilation and forcing products • Monitoring of regional areas, boundary conditions for regional models Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  4. Meeting the user needs • Interactions with users • Modelisation community : fluxes, SST, salinity • Coastal users (satellite image browser) • Involvement in various programmes and projects • MERSEA, GODAE, MERCATOR,… • Climate : CARBO-OCEAN, CLIVAR,… • Sea-ice : ICEMON, CONVECTION, GLOBICE, DAMOCLES,… • Environment and security : ROSES, MARCOAST,… • Coastal operational oceanography • Partnerships • To build a portal to ocean satellite data • JPL/PO.DAAC => Mirroring of scatterometer swath data (NSCAT, QuikSCAT, Adeos-2) • EUMETSAT Ocean & Sea-ice SAF => SST and sea solar fluxes • MEDSPIRATION => near real time SST Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  5. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level direct observation products • Swath data or « simple » regridding • Raw observation (ex: backscatter, reflectance,…) and geophysical quantities (wind, chlorophyll concentration,…) • Delayed mode scatterometer data (wind vectors) • ERS-1/ERS-2 : 50 km resolution, 500 km wide swath, 10 years long time series • NSCAT on ADEOS-1 : 50 km, 1996-1997 • SeaWinds on QuikSCAT and ADEOS-2 : 25 km, 1600 km, 1999-today • Web > data > catalog > swath Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  6. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level direct observation products • Swath data or « simple » regridding • Raw observation (ex: backscatter, reflectance,…) and geophysical quantities (wind, chlorophyll concentration,…) • Delayed mode altimeter data (sea level height, significant wave height, wind speed) • ERS-1/ERS-2 : 10 years long time series • Web > data > catalog > swath Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  7. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level direct observation products • Swath data or « simple » regridding • Raw observation (ex: backscatter, reflectance,…) and geophysical quantities (wind, chlorophyll concentration,…) • sea surface temperature • 4 km pathfinder archive • ftp://ftp.ifremer.fr/ifremer/cersat/products Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  8. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level direct observation products • Sea surface temperature • EUMETSAT O&SI SAF products • 1 day delay • ftp://ftp.ifremer.fr/ifremer/cersat/SAFOSI • Swath data or « simple » regridding • Raw observation (ex: backscatter, reflectance,…) and geophysical quantities (wind, chlorophyll concentration,…) Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  9. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level direct observation products • Swath data or « simple » regridding • Raw observation (ex: backscatter, reflectance,…) and geophysical quantities (wind, chlorophyll concentration,…) • Sea surface temperature • Real-time high resolution SST • MEDSPIRATION project Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  10. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level direct observation products • Swath data or « simple » regridding • Raw observation (ex: backscatter, reflectance,…) and geophysical quantities (wind, chlorophyll concentration,…) • Ocean color (SeaWIFS, MODIS) • Chlorophyll-a, suspended matters • 1-2 km resolution • Bay of biscay, channel and north sea • Delay down to 1 day • Image browsing facility : http://www.ifremer.fr/cersat/facilities/browse/del/gascogne/browse.htm Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  11. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level Gridded products • Gridding : averaging, kriging, optimal interpolation • Mean wind fields • Wind and stress • ERS-1, ERS-2, NSCAT, QuikSCAT • 0.5° resolution, daily/weekly/monthly • Widely acknowledge : 1600 users • Delay : 4-5 days • Web > data > catalog > gridded Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  12. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level Gridded products • Gridding : averaging, kriging, optimal interpolation • Sea ice maps • Concentration • Sea-ice type discrimination • ERS-1, ERS-2, NSCAT, QuikSCAT, SSM/I • 25km to 12.5 km , daily toweekly • Delay : 4-5 days • Web > data > catalog > gridded Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  13. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level Merged products • Merging several sources (same parameters) • Gridded products • Feeling gaps • Improved spatial/temporal resolution • Combined with geostatistical methods • Sea ice drift • Correlation over successive backscatter/concentration images • Merging QuikSCAT, SSM/I, AMSRE • 60 km , 6-day to 2-day maps • Delay : 4-5 days • ftp://ftp.ifremer.fr/ifremer/cersat/products/gridded/psi-drift/ Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  14. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level Merged products • Merging several sources (same parameters) • Gridded products • Filling gaps • Improved spatial/temporal resolution • Combined with geostatistical methods • SST maps • METEO-FRANCE/CMS product • Atlantic : merging GOES-E, MSG/SEVIRI, AVHRR • 0.1°, daily map • Delay : 1 day • ftp://ftp.ifremer.fr/ifremer/cersat/products/gridded/ • MEDSPIRATION maps • High resolution map, near real time Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  15. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level Merged products • Merging several sources (same parameters) • Gridded products • Filling gaps • Improved spatial/temporal resolution • Combined with geostatistical methods • Blended products • Combine model outputs and satellite data • Higher temporal/spatial resolution • Wind (2005) • ECMWF with QuikSCAT, SSM/I and altimeters (Jason, Envisat) • 25km, 6-hourly maps • Near real-time Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  16. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level Combined products • Combining several sources (different parameters) to derive new quantities • Gridded products • Combined with geostatistical methods • Turbulent fluxes • Latent and sensible heat • Combining wind, SST, Brightness temperature • 0.5°, weekly maps • ftp://ftp.ifremer.fr/ifremer/cersat/products/gridded/ • To come : blended fluxes (2005-2006) • Near real time Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  17. timeliness real-time delayed mode Scale global regional direct observation griddedproducts combined or merged products Product level Combined products • Combining several sources (different parameters) to derive new quantities • Gridded products • Combined with geostatistical methods • CO2 gas exchange coefficient • Combining wind, SST (Liss&Merlivat, Wanninkhof and Nightingale parameterization) • ERS-1/ERS-2/QuikSCAT • 1° to 0.5°, weekly/monthly maps • ftp://ftp.ifremer.fr/ifremer/cersat/products/gridded/ Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  18. Data access • www.ifremer.fr/cersat • ftp://ftp.ifremer.fr/ifremer/cersat • User help desk : fpaf@ifremer.fr • Data dissemination • Standard formats : HDF, netCDF • CDROM, DVD, DLT on demand • ftp push on demand • OpenDAP • Live access Server : www.ifremer.fr/las • Web subsetting interface (enhanced subsetting system : Fall 2005) • Image browsers for gridded data Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  19. CERSAT : conclusion and plans • Products evolved : • From global to regional scale • From observation to synthesis • higher spatial/temporal resolution • From delayed-mode to real-time products • Improved data dissemination • Capability to set-up products for specific usage (area, resolution, parameters) • Provides sustained data production and tools for operational oceanography • Better synergy to find with model and in situ data • Homogeneize data access, interconnect to other information systems/observation networks http://www.ifremer.fr/cersatHelp desk : fpaf@ifremer.fr Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  20. Medspiration : a near-real time service for SST • The GODAE / GHRSST-PP project • Delivering a new generation of global and multi-sensorhigh resolution SST datasets, as defined by the GHRSST Science Team, reflecting a general consensus opinion (format, content, processing) • Distributed approach for the operational production and dissemination of GHRSST data products : Regional Data Assembly Center • Regional areas • Specific sensors • Same processing model, format, content,… • Medspiration project • European node for the GHRSST-PP system • Funded by ESA • Partnership : • CERSAT, NOC, METEO-FRANCE, CLS • CERSAT tasks : processing, archiving, dissemination • Quality control, flags, ancillary data, confidence • products can be used individually or together with equal confidence Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  21. MSG/SEVIRI ENVISAT/AATSR NOAA16&17/AVHRR AQUA/AMSR-E TRMM/TMI L2P : infra-red products • IR radiometers • Polar orbiting and geostationnary satellites • Skin SST (10-20 µm) • Cloud, aerosol contamination • Affected by diurnal cycle (warming) • High resolution (10km > 1km) • Coverage : atlantic (AATSR global in oct.2005) Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  22. MSG/SEVIRI ENVISAT/AATSR NOAA16&17/AVHRR AQUA/AMSR-E TRMM/TMI L2P : microwave products • MW radiometers • Polar orbiting • Subskin SST (~1 mm) • Rain contamination, no data close to land • Affected by diurnal cycle (warming) • Low resolution (25km) • Poor sampling in some areas • Coverage : Atlantic Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  23. L4 product • Objective : high resolutiongap free maps of SST fundation • Optimal interpolation • Merging all sensors available (high resolution IR and low resolution MW) • Focused area : Mediterranean sea, 2km resolution, daily Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  24. Data access • Real-time, operational and sustained production • Format : netCDF (complying to GHRSST-PP specifications) • Timeliness • L2P : delivery in near-real time, at latest day+1, 7:00 • L4 : run each day at 7:00 UTC : required delivery before 12:00 (current mean processing time : 50 min) • Medspiration web site : http://www.medspiration.org • User help desk : fpaf@ifremer.fr (help@medspiration.org) • Dissemination facilities • FTP push (on demand) • FTP server, last 3 months of data, free access (anonymous login) • ftp://ftp.ifremer.fr/ifremer/medspiration/data • OpenDAP (aka DODS) server • http://www.ifremer.fr/cgi-bin/nph-dods/data/satellite/medspiration • Live Access Server • http://www.ifremer.fr/las(L4 product only) Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

  25. Plans • Extending the service to global ocean (MERSAT) • European GDAC • Mirror archive for L2P products • New gap-free interpolated maps • Atlantic (0.1°, daily) : end 2005 • Global (0.1°, daily) : mid-2006 Forum des Utilisateur des bases de données IFREMER – Brest, 25 Novembre 2005

More Related