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Toward the SST Climate Data Record from Space

Toward the SST Climate Data Record from Space. Kenneth S. Casey - NOAA National Oceanographic Data Center Richard W. Reynolds - NOAA National Climatic Data Center Edward J. Kearns - University of Miami Andrew D. Barton - NOAA National Oceanographic Data Center. The AVHRR Pathfinder Program.

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Toward the SST Climate Data Record from Space

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  1. Toward the SST Climate Data Record from Space Kenneth S. Casey - NOAA National Oceanographic Data Center Richard W. Reynolds - NOAA National Climatic Data Center Edward J. Kearns - University of Miami Andrew D. Barton - NOAA National Oceanographic Data Center

  2. The AVHRR Pathfinder Program • Advanced Very High Resolution Radiometer (AVHRR) on NOAA Polar Orbiters • Heritage: NOAA/NASA AVHRR Oceans Pathfinder Program of the 1990’s (V4) • Collaboration: NODC, NCDC, RSMAS, NASA PO.DAAC To develop the SST climate data record for AVHRR in a sustained environment

  3. AVHRR Pathfinder Version 5 • Coverage: Global, 1985-near present • Spatial resolution: ~ 4 km • Averaging periods: Daily, 5-day, 7-day, 8-day, Monthly, and Yearly (day and night) • Corresponding climatologies • FGDC and Rich Inventory Metadata • Satisfies most IOOS DMAC requirements http://pathfinder.nodc.noaa.gov

  4. Improvements over Pathfinder V4 • Finer global resolution - now 4 km was 9 km • Significantly improved land mask • Inland waters and lake observations • More ancillary and statistical data • Longer time series… now in our 21st year! Climate, coastal,and ecosystemapplications now possible!

  5. Improved Coastal Coverage • ReefBase reef location database ~ 8000 sites • 9 km Pathfinder coverage only 61% • 4 km Pathfinder coverage: > 98%

  6. Operational NESDIS 50 km Latitude Longitude

  7. AVHRR Pathfinder 9 km Latitude Longitude

  8. AVHRR Pathfinder 4 km Latitude Longitude

  9. Includes Lakes and Inland Waters

  10. Nighttime Pathfinder - HadSST2 NOAA9 NOAA11 NOAA14 NOAA16 Operational - HadSST2 NOAA7 NOAA9 NOAA11 NOAA14 NOAA16

  11. Daytime Pathfinder - HadSST2 NOAA9 NOAA11 NOAA14 NOAA16 Operational - HadSST2 NOAA7 NOAA9 NOAA11 NOAA14 NOAA16

  12. Nighttime Pathfinder - OISSTv2 NOAA9 NOAA11 NOAA14 NOAA16 Operational - OISSTv2 NOAA7 NOAA9 NOAA11 NOAA14 NOAA16

  13. Daytime Pathfinder - OISSTv2 NOAA9 NOAA11 NOAA14 NOAA16 Operational - OISSTv2 NOAA7 NOAA9 NOAA11 NOAA14 NOAA16

  14. Satellite Biases Nighttime Operational Pathfinder +/- 1 C 1982 2004 Daytime +/- 1 C Weekly Satellite-OISSTv2

  15. Maximum Satellite - OISSTv2 Operational Pathfinder Weekly Nighttime 1982 2004 Weekly Daytime

  16. Minimum Satellite - OISSTv2 Operational Pathfinder Weekly Nighttime 1982 2004 Weekly Daytime

  17. Average Differences Over Time

  18. Improvements Coming in PFV 6 • Wind and aerosol ancillary data • Improved QC including aerosol flagging and better use of sea ice • Improved data management (HDF5 with CF and ACDD metadata?) • 1985-2005 (maybe back to 1981?) • Implement “18-line problem” correction with new global gridding scheme

  19. Connections to GHRSST • GODAE High Resolution SST (GHRSST) • GHRSST is both real time and retrospective • Optimizing the retrospective connection… • Level 2 • Times of Observation • All AVHRRs? • Error estimates

  20. Acknowledgements Thanks to John Kennedy and Nick Rayner, Hadley Centre, UK Met Office, for providing the HadSST2 data set !!

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