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ICOADS: Plans and Prospects for Improvements

ICOADS: Plans and Prospects for Improvements. Scott D. Woodruff , NOAA/ESRL USA Steven J. Worley, NCAR USA Richard W. Reynolds NOAA/NCDC USA. MARCDAT-II UK Met Office, Exeter 17-20 October 2005. Topics. Make regular updates Digitize & blend new data Resolve data/QC problems

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ICOADS: Plans and Prospects for Improvements

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  1. ICOADS: Plans and Prospects for Improvements Scott D. Woodruff, NOAA/ESRL USA Steven J. Worley, NCAR USA Richard W. Reynolds NOAA/NCDC USA MARCDAT-II UK Met Office, Exeter 17-20 October 2005

  2. Topics • Make regular updates • Digitize & blend new data • Resolve data/QC problems • Integrate data & metadata • Transition to IMMA format • Leverage JCOMM ETMC

  3. Regular updatesRelease 2.2: 1784-2004 • NCEP BUFR + original GTS string • NCDC GTS: still under development • redundancy important • annual updates – eventually monthly DM RT?

  4. % ocean/coastal coverage per variable (fr Worley et al. 2005, IJC)

  5. FM 18-XII BUOY suppl.: GTS: TAO/TRITON & PIRATA: blue = decoded RH temp, salinity, current QC/technical, e.g., anemometer height & type

  6. 2. Digitize & blend new data New initiative: RECovery of Logbooks And International Marine data (RECLAIM) E.g., UK (~5% tapped) CDMP & UK funding?

  7. Blend candidates:red (undigitized), yellow (partly), green (fully) est. resources: >3 person-years translation & blending Auxiliary

  8. CLIWOC + US Maury • Impact of Brussels 1853 • Sub-daily obs: cost benefit issues to key, especially < 1853

  9. USN Sub Devilfish, 1945hourly “water injection” temps

  10. Resolve data problems – QC • Trimming problems (Wolter, 1997) • Undetected duplicates (Ansell, Compo) • US Maury SLP biases (Ansell) 1=gravity, 2=& temp correction (attm T)

  11. 3. Integrate data & metadata • WMO No. 47: ship characteristics • Already blended: 1973-2004 • 1955-72: late 2005? (few call signs <1966) • ODAS (buoys, etc.): JCOMM center • Work proposed to gather historical • E.g., records stored at NDBC (Katrina) • Climate-quality products • adj., e.g., for platform height

  12. Early historical UK ship metadata(mostly from reference books; Clive Wilkinson) • Ship name, tonnage, & dimensions • Type of vessel • No. of guns • Propulsion • Instruments - from logbooks Also proprietary info: Lloyds, etc.

  13. US Maury: obs made Fr: Woodruff et al. (2005): Early ship observational data and ICOADS. Climatic Change, 73, issue 1-2, 169-194 (in special issue for CLIWOC, appearing shortly) • Major improvement possible: translation of wind force text terms into Beaufort numbers: • CLIWOC dictionary – KNMI

  14. 4. Transition to IMMA • Flexibility to store historical & modern • ASCII: software independent • – contrast: netCDF, DBMS, BUFR • Strength: archival (w/ similar contrasts) • Need for international format for historical exchange (JCOMM) • – simple enough for individual countries

  15. IMMA record types core (core + optional attms…) core icoads immt2 meta Key for archival: attm of complete original (suppl.) data: core . . . suppl. • R2.2: suppl. not yet available before 1980 • Conversion: of abbreviated LMRF to IMMA • E.g., sea ice obs from TDF-11, FOSDIC • Plus: e.g., TDF-11 not fully attm to LMR

  16. JCOMM Expert Team on Marine Climatology (ETMC) • Bob Keeley – DM PA • New focus • Among possible tasks: • IMMA format adoption • Knitting surface marine together with: • Oceanographic (e.g., near sfc) • Sea ice

  17. JCOMM Structure(Adopted at JCOMM-II, Halifax, Sep. 2005) incl. TAO/TRITON and PIRATA; issues with DM vs. GTS:

  18. Conclusions Timely availability of data, metadata, & products Early EU archives (esp. UK): many data & metadata But translation, blending, and data quality: resources IMMA format key for permanent archival + suppl. data International contributions vital CLIMAR-III: 3rd JCOMM Workshop on Advances in Marine ClimatologyPlanned for 2007 – Location?

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