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Data Support for Climate Research from NCAR

Data Support for Climate Research from NCAR. Steven Worley Doug Schuster Joey Comeaux 4 th ACRE Workshop, EC FP7 EURO4M, ERA-CLIM, AHRC Historic Weather KNMI, De Bilt , The Netherlands, 21-23 September 2011. Topics. Research Data Archive at NCAR Data Service Communities Data Content

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Data Support for Climate Research from NCAR

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  1. Data Support for Climate Research from NCAR Steven Worley Doug Schuster Joey Comeaux 4th ACRE Workshop, EC FP7 EURO4M, ERA-CLIM, AHRC Historic Weather KNMI, De Bilt, The Netherlands, 21-23 September 2011

  2. Topics Research Data Archive at NCAR Data Service Communities Data Content Reanalyses Observations Analyses Future

  3. Research Data Archive (RDA) at NCAR • Purpose - support climate & weather research by curating, organizing, documenting, and creating access to research datasets • To extent possible, all data and services are free and open • Take Away Metrics • Established in 1960s • 600+ datasets, 4M files, 600 TB • 7000 unique users annually • Many datasets routinely updated • daily, weekly, monthly

  4. Research Data Archive (RDA) at NCAR Core Data Categories • Operational and Reanalysis model outputs Meteorological and Oceanographic Observations Remote Sensing Observations • Topography/Bathymetry, Vegetation, Land Use

  5. Data Service Communities RDA Infrastructure Components, w/o Network DAV GLADE RDA Web HPSS SC

  6. Self-help Users GLADE, 155 TB, 125 Datasets HPSS, 600 TB, All (600+) Datasets Automated Services move data from HPSS to GLADE as needed DAV GLADE RDA Web HPSS SC Self-help Users File Flow

  7. Assisted Users, One-off Requests Assisted User DAV GLADE RDA Web • Assistance: • Data-selection interfaces and automated processing • Data processed by RDA staff HPSS SC Computational Service

  8. NCAR Users – two pathways Reference Only DAV 1 1 NCAR Users GLADE RDA Web 2 2 1 2 HPSS SC

  9. Data Content • Reanalyses • Observations • Analyses

  10. Reanalyses • 10 Major Collections, providers NCEP, ECMWF, JMA, NOAA-CIRES • Start Year: aligned with satellite era, exceptions: NNR, ERA-40, 20CR • ERA-I recently pre-pended to 1979, not in RDA now • End Year: Most are ongoing • Resolution: • Highest shown here – lower resolutions also available • Increasing resolutions => more storage and need for subsetting • E.g. NCEP CFSR v1 is 80TB, online

  11. Reanalyses • Format • Native GRIB1 or GRIB2 • Conversion – limited capability now • Subsetting • By variable/parameter – only newest ones • By date – newest ones on specific days, some capability from file organization • By vertical level – only newest ones • Geospatial – not available

  12. Reanalyses Usage Examples (CFSR, 20CR)

  13. Observations • 5 notable long-term collections: ICOADS, ISPD, UADB, WMSSC, NCEP Surf. Ops. • Start Year: push back to the 1600-1700’s • End Year: Mostly ongoing • Format: Many Native, conversion to ASCII and one to netCDF • Subsetting: Generally, complete temporally and geo-spatially • Truth – This is really time consuming work

  14. Observations Examples: ICOADS, ISPD, WMSSC • Start Date: ~January 2010 • ICOADS, 30% requesting subsetting • Monthly updates have increased routine file access • ISPD, 50% users subset, probably for ASCII output • WMSSC, many users, small data volume

  15. Observations: UADB Update • Basic Features • ~ 2,500 Total Stations from 30+ sources • Pibals, 1920-2011 • Raobs, 1943-2011 > 700 stations with 30+ years

  16. Observations: UADB Update • Status • Homogeneous units and format • Updated monthly with NCEP operational data • Interface access; two sources 1973-2011 • http://dss.ucar.edu/datasets/ds370.0 • All data available by request • Goals • Complete access to CHUAN • “Corrected" stations, ingested, undergoing validation • Improve station history metadata • Form longer time series, upon user selection • Extend interface availability to earliest records • Complete QC research and implement • Add aircraft data • Coordinate with NCDC, bilateral completeness

  17. Analyses • Surface: SST, SLP, ocean fluxes; Ocean 3D: T&S, and V • Start Year: push back to 1850’s at best • End Year: Mostly ongoing • Format: a mixture • Subsetting: not extensive

  18. Future • Complete ERA-I back to 1979 • Add products from ERA-CLIM Project? • CFSR-lite • NOAA, 1949(?)-> current, T126 • Retirement of NCEP/NCAR Reanalysis • Arctic System Reanalysis, OSU/UA/NCAR • Initially, 11 years • Improvements to UADB • More subsetting and more format conversion • Expansion into interoperable web access

  19. Wrap up Research Data Archive at NCAR • Well designed for climate research support Data Service Communities • Convenient for many worldwide Data Content: Reanalyses, Observations, Analyses • Substantial with increasingly easy access options Future • Plans to grow content, and improve current archives

  20. http://dss.ucar.edu

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