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ICOADS: Plans and Prospects for Improvements

This document outlines the plans and prospects for enhancing the International Comprehensive Ocean-Atmosphere Data Set (ICOADS) through regular updates, digitization, integration of data and metadata, and the transition to the IMMA format. Key topics include resolving data quality issues, leveraging existing meteorological and oceanographic data sources, and improving historical data recovery through initiatives like RECLAIM. The importance of international collaboration is highlighted to ensure the long-term archival and accessibility of marine climate data for future research and climate monitoring.

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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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