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Advances in GHRSST and SST Climate Data Understanding (2007)

This document details the advancements and status of the GHRSST (Group for High-Resolution Sea Surface Temperature) initiative and related SST (Sea Surface Temperature) climate data records. It highlights reanalysis efforts, the status of data archives, including significant holdings from multiple sensors, and ongoing improvements in quality tests and intercomparison methodologies. The aim is to enhance the integration of historical and satellite SST data for better understanding and application in climate studies.

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Advances in GHRSST and SST Climate Data Understanding (2007)

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  1. GHRSST/Medspiration and the SST Temperature Climate Data RecordKenneth S. CaseyNOAA National Oceanographic Data Center, USA20-22 November 2007 Oslo, Norway

  2. DMI GOS GODAE High Resolution SST AMSR-E L2P AVHRR-16 L2P AVHRR-17 L2P AVHRR-18 L2P MODIS L2P SEVIRI L2P AATSR L2P TMI L2P MED L4 Dec 2006 Nov 2007 AMSR-E Gridded TMI Gridded GOES L2P MetOp AVHRR OSTIA L4 Two Reynolds L4 Soon: ODYSSEA L4 and GOS MED L4

  3. Archive Status • LTSRF Archive Holdings as of Dec 2006 • 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

  4. Archive Status • LTSRF Archive Holdings as of Nov 2007 • 8.6 TB (172 TB uncompressed) spanning 1985 through 2007 • 33324 accessions (RDAC/Sensor/Level/Date), 487121 files • AMSR-E, AVHRR-16, AVHRR-17, AVHRR-18 (GAC and LAC/HRPT) , MODIS Aqua and Terra, SEVIRI, AATSR, TMI, GOES, MetOpAVHRR, Gridded AMSR-E and TMI, Two Daily Reynolds OI L4, OSTIA L4 • Plus: automated status reporting, RSS feeds • Coming Soon: ODYSSEA L4, DMI N.Sea L4

  5. Dec 2006 Current Status

  6. Dec 2006 Current Status

  7. Dec 2006 Current Status

  8. Archive Access Statistics * Including HTTP users For reference, Pathfinder FTP in 2007 has delivered ~3 TB in 600,000 files to 707 users

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

  10. GHRSST Reanalysis System Map Delayed Mode Data International Reanalysis Community GCOS SST SI RAN Projects Pathinder LTSRF Reanalysis SST CDRs (L4) GDAC NASA & MyOcean NODC GHRSST-PP Near Real-Time Data RDACs

  11. Pathfinder Climate Data Records • Pathfinder Version 5 being used extensively in re-analysis products • Reprocessing capability being transferred to NODC • Version 6 will consist of both L2P and L3 products • Uncertainties to be developed similar to MODIS hypercube approach • Improvements to quality tests being evaluated

  12. GCOS SST and SI Working Group • Intercomparison site being populated now: • AVHRR Pathfinder V5, AVHRR Pathfinder V4 • Operational AVHRR • HadSST2 • Kaplan • ERSST, OISSTv2, New Daily OI • Weekly, one-degree and monthly five-degree • Connecting historical SST reconstructions with the satellite record • First phase (all products in GHRSST L4) by Jan 1

  13. Example L4 Re-Analyses • Reynolds Daily OI - Daily 25 km • Two versions, one available back to 1985 using Pathfinder • Improvements under development New OI Using Pathfinder AVHRR New OI Using Pathfinder AVHRR + AMSR-E Dick Reynolds NOAA NCDC

  14. Example L4 Re-Analyses • Met Office OSTIA Reanalysis • Using AVHRR Pathfinder back to 1985 • Inputs compiled in 2008… John Stark and Craig Donlon Met Office, UK

  15. Status of GHRSST L4 Reanalyses RSS

  16. GHRSST Multi Product Ensemble • Effort underway to inter-compare various GHRSST and related L4 products • Based on an ensemble median approach (http://www.ghrsst-pp.org/Todays-global-SST.html) • Currently includes: Met Office OSTIA SST NCEP RTG_SST_HR SST NAVOCEANO NAVO K10 SST observations JMA MGDSST SST RSS RSS MW Fusion SST RSS RSS MW+IR Fusion SST FNMOC GHRSST-PP SST and sea Ice MERSEA ODYSSEA SST NOAA AVHRR OI (Reynolds Daily OI)

  17. Status of GHRSST L2P Reprocessing Version 2 in Spring 2008, ARC Version 3 in 2009 Andy Harris and Eileen Maturi w/ NCDC, in 2008 Pathfinder RSS NOAA Scientific Data Stewardship - Evans, Kilpatrick, and Casey - commenced July 2007 RSS

  18. SST CDR Priorities for 2008 • Initiate OSTIA Reanalysis back to 1985 • Link historical and satellite analyses through intercomparison (both GCOS and GMPE) • Close out Pathfinder V5 for 1985-2007, and include 1981-1984 • Establish initial AVHRR Pathfinder capability at NODC ==> Version 6 • Find a means of creating retrospective MODIS L2Ps • (A)ATSR Version 2

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

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