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Sea Surface Temperature Operational Products Used by the CoastWatch West Coast Regional Node

Dave Foley Joint Institute for Marine and Atmospheric Research University of Hawai’i at Manoa and Environmental Research Division Southwest Fisheries Science Center National Marine Fisheries Service dave.foley@noaa.gov OPOP telecon March 18, 2009. Sea Surface Temperature

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Sea Surface Temperature Operational Products Used by the CoastWatch West Coast Regional Node

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  1. Dave Foley Joint Institute for Marine and Atmospheric Research University of Hawai’i at Manoa and Environmental Research Division Southwest Fisheries Science Center National Marine Fisheries Service dave.foley@noaa.gov OPOP telecon March 18, 2009 Sea Surface Temperature Operational Products Used by the CoastWatch West Coast Regional Node

  2. CoastWatch West Coast Regional Node Operational SST Products Color Key

  3. Operational SST Access - West Coast • THREDDS • Data aggregator, allows access via OPENDAP and WCS to any data set (4-Dimensions or less). • CWBrowsers (accesses data via THREDDS) • Extensive manipulation and overlay of various satellite, in situ and other marine products • ERDDAP (accesses data via THREDSS) • Allows extensive data access, display and query for satellite and in situ data, and model output. • All of these allow the following • Arbitrary sub-setting in time and space • Download to variety of formats including netCDF, HDF-4, matlab, ArcGIS, ascii, csv etc… • Direct import of data via simple URL

  4. CoastWatch AVHRR Mapped • Maintained as a legacy service from the West Coast Node prior to 2003. • Interface allows manipulation of images • Downloads of data in a couple of formats • No spatial subsampling, no interoperability • Comes in an entirely self-contained module developed by Peter Hollemans. Will probably run forever. • Accounts for less than 2% of Node data flow, mainly recreational fishers.

  5. CoastWatch AVHRR Mapped II • Issues • Mercator projection • Cloud mask should be applied prior to projection unless 1:1 projection from swath is applied (i.e., nearest neighbor) • Recommendations • Correct issues above, OR • Terminate data stream to free resources for other data. This sort of mapping can and should be done at the node level. • Future • No changes planned

  6. CoastWatch AVHRR Swath • Mapped to geographic projection and formed to 1, 3, 8, 14-day and monthly composites. • Served via THREDDS, CWBrowsers, ERDDAP • Used to support NMFS cruises • CalCOFI (with Scripps Inst. Oceanog.) • Cetacean surveys • Groundfish Stock Assessment • Turtle surveys (e.g., LUTH cruise) • Used for MPA monitoring in Monterey Bay National Marine Sanctuary in conjunction with Pathfinder v5.0 • Being integrated into version 2 of new 1km Blended product from NASA JPL (Y. Chao et al.)

  7. CoastWatch AVHRR Swath II • Issues • Night time cloud mask for METOP - lots of fringing at cloud edges, misses a lot of low stratus. • Cloud masking is not so good in general - even CLAVR-1 and CLAVR-X leave much to be desired, especially in the coastal regions • Recommendations • Great data stream, very timely, convenient format. • Not sure if a good cloud mask is even possible for NRT data streams. But if it is, let’s find it. • Future • If we can get a decent cloud mask, I will start recommending this for Scientific Applications.

  8. AVHRR MUT • My very first NRT Global data set (1996) • Excellent cloud clearing • Easy Access • Mapped to geographic projection and formed to 1, 3, 5, 8, 14-day and monthly composites. • Served via THREDDS, CWBrowsers and ERDDAP • Uses include • Substitution for Pathfinder in Research work when Pathfinder is not available • El Nino Watch (May 2003 - February 2009) • Included in NRT Blend-o-matic product. • Featured on TOPP real time page (Tagging of Pacific Pelagics - Census of Marine Life)

  9. AVHRR MUT II • Issues • Can we keep 48 hours worth on the DDS server? If there is a glitch in communications, I lose data. • No apparent archive support. I once asked NCDC for six months of data and they asked for $36,864 (with the “NOAA discount”)… • Recommendations • Just keep it coming - this is a model NRT data stream. • Future • This data set has been replaced in most applications by my blended SST product. That in turn will be replaced April 1, 2009 by a new GHRSST blended SST develped by Remote Sensing Systems, Inc, (Santa Rosa, CA). But this will serve as an invaluable reference to ensure the new ones stay on track.

  10. GOES E/W Hourly • Unique coverage aspects provided by high-frequency data • Mapped to geographic projection and formed to 1, 3, 8, 14-day and monthly composites. • Served via THREDDS, CWBrowsers and ERDDAP • Uses • Salmon Habitat Index • Included in Blend-o-matic

  11. GOES E/W Hourly II • Issues • SST accuracy a bit low, lots of noise in daytime data • Seems to be some striping in new Bayesian version • Allows the resolution of open ocean mesoscale features, but a bit coarse for coastal features. • Recommendations: • Have a peek at the striping issue • The GOES-R data (~2 km footprint) should handle the resolution issue • Future • Would like to see more historical coverage, if possible.

  12. GOES Frontal Probability Index • Tim Mavor’s index indicates presence/absence of fronts using a combination of gradient thresholds and feature identification • Mapped to geographic projection and formed to 1, 5, 10, 14-day and monthly composites. • Served via THREDDS, CWBrowsers and ERDDAP • Uses • Determining top predator habitat and foraging preferences • Determining likely zones of accumulation for debris and icthyoplankton

  13. GOES Frontal Probability Index II • Issues • Too coarse for coastal work • Might be nice to have the actual gradient as well as the presence/absence of a front • Recommendations • Run it through the new O’Reilly/Belkin chlorophyll frontal detector (see OCPOP for details). I’ve tried it - works pretty well. • Future • No changes planned.

  14. In Process • ACSPO • Generally nice data stream • Needs a better cloud mask for nighttime • Will probably just use a pared-down version of the 1km data stream instead • Blended POES/GOES • Like the adaptation of GHRSST standards and error characterization • Please use microwave !!! • MSG Hourly + MTSAT • Didn’t know it existed until I saw the table in slide 2

  15. Links to West Coast Data • THREDDS Server • http://oceanwatch.pfel.noaa.gov/thredds • ERDDAP • http://coastwatch.pfel.noaa.gov/erddap • CoastWatch Browsers • http://coastwatch.pfel.noaa.gov/coastwatch/CWBrowser.jsp • http://coastwatch.pfel.noaa.gov/coastwatch/CWBrowserWW180.jsp

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