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Regional/Global Task Sharing

GHRSST Reanalysis Current Status Reanalysis Requirements Connections to GlobCOLOUR Kenneth S. Casey NOAA National Oceanographic Data Center, USA 4-6 Dec 2006 Villefranche-sur-mer. EUMETSAT. Regional/Global Task Sharing. NOAA NODC. Stewardship and Reanalysis.

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Regional/Global Task Sharing

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  1. GHRSST ReanalysisCurrent StatusReanalysis Requirements Connections to GlobCOLOURKenneth S. CaseyNOAA National Oceanographic Data Center, USA4-6 Dec 2006Villefranche-sur-mer

  2. EUMETSAT Regional/Global Task Sharing NOAA NODC

  3. Stewardship and Reanalysis US NOAA National Oceanographic Data Center

  4. Stewardship and Reanalysis http://ghrsst.nodc.noaa.gov

  5. Current Status • Stewardship capability established at US NODC • Automatic daily acquisition and archive from GDAC • 30-day delay from observation to archive • All available online FTP, HTTP, and OPeNDAP • All data searchable via NODC Ocean Archive System - http://www.nodc.noaa.gov/cgi-bin/search/prod/accessionsView.pl/pref • Extensive metadata • Current Archive Holdings • 1.7 TB (~32 TB uncompressed) spanning 2005 and 2006 • > 8300 accessions (RDAC/Sensor/Level/Date), ~120k files • AMSR-E, AVHRR-16, AVHRR-17, AVHRR-18 (GAC and LAC/HRPT) , MODIS Aqua and Terra, SEVIRI, AATSR, TMI • Coming Soon: GOES, Gridded AMSR-E and TMI

  6. Current Status • Data rates graphic…

  7. Current Status • Data rates graphic…

  8. Current Status • Data rates graphic…

  9. Free and Open Access: http/ftp

  10. Free and Open Access: OPeNDAP

  11. Free and Open Access: OPeNDAP

  12. Free and Open Access: OPeNDAP

  13. Free and Open Access: OAS

  14. Free and Open Access: OAS

  15. GHRSST-PP Near Real-Time Data GHRSST Reanalysis System Map Delayed Mode Data International Reanalysis Community LTSRF at NODC Reanalysis SST CDRs (L4) GDAC

  16. Goals of GHRSST Reanalysis • Create delayed mode climate data records with higher accuracy and consistency • Link to longer term climate data • Enable a sustained reprocessing capability • Adhere to the GCOS Climate Monitoring Principles

  17. Delayed-Mode Improvements Reanalysis can improve over near real time analysis by making use of: • Late-arriving data • Improved matchups, errors statistics, analysis procedures, diurnal models • Techniques which require data from “future” observations • Procedures too demanding for near real time production • Consistent procedures for entire time series • Reprocessed L2P data…

  18. GHRSST Reanalysis Requirements GHRSST Reanalysis depends on: • Reprocessed ATSR-1, ATSR-2, AATSR series - we need the consistency, accuracy, continuity… • Continued AATSR L2P production after end of Medspiration in June 2007 • Ocean color data within the SST data sets for diurnal warming and flagging aerosols - INTEGRATED DATA SETS! • Expanded HR-DDS to include L4 SSTs, model SSTs, ocean color • An expanded Matchup Data Base for GHRSST

  19. SSTfnd Reanalysis Product Specifications • Spatial: Global, 5-10 km • Temporal: Once per day • Type of SST: SSTfoundation • Error Stats: Bias and Standard Deviation • Format: GHRSST L4 netCDF, CF metadata (Modified from A. Stuart-Menteth)

  20. Ensemble Approach Schematic GEO Task DA-06-03

  21. Example L4 Analyses New OI Using Pathfinder AVHRR • New Reynolds Daily OI - Daily 25 km New OI Using Pathfinder AVHRR + AMSR-E Dick Reynolds NOAA NCDC

  22. Example L4 Analyses • Met Office OSTIA John Stark and Craig Donlon Met Office, UK

  23. Example L4 Analyses • Australian Bureau of Meteorology BoM Operational Regional SST1m BoM Test Regional SSTfnd Met Office Global OSTIA SSTfnd CMAR 3 Day AVHRR SST1m Helen Beggs, Australian BoM

  24. If you have an L4 SST analysis… • Get it into GHRSST - use L4, write good metadata, send it to GDAC • Get it into GHRSST - use L4, write good metadata, send it to GDAC • Get it into GHRSST - use L4, write good metadata, send it to GDAC In summary: • Get it into GHRSST - use L4, write good metadata, send it to GDAC

  25. Ongoing and Future Activities • Continual improvements to data access • Now that archive and stewardship functions are in place, focus on reanalysis efforts (the RF in LTSRF) • Clearly identifying (and encouraging) L2P reprocessing efforts • GCOS SST and SI Intercomparisons: collecting data, unified access • 1st GHRSST Reanalysis and ensembles

  26. Possible GlobCOLOUR Connections • Integrated SST - Ocean Color data sets? • GHRSST already delivering both MODIS Aqua and MODIS Terra chl-a and K490 fields • Users often want/need both SST and OC • Lessons for Data Management? • RDACs to GDAC to LTSRF • International and intranational • Uniform file formats and contents • Critically important • Strong metadata • Maximally not minimally compliant • Shared reanalysis systems? • Many common processing steps • Leverage existing resources • Shared intercomparison resources

  27. Thank-you! • Ian Robinson and ESA • Ed Armstrong and the GDAC team • NODC and the LTSRF Team: John Relph, Sheri Phillips, Eric Ogata, Joe Shirley Kenneth.Casey@noaa.gov http://ghrsst.nodc.noaa.gov

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