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TIGGE Archive at NCAR

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Nathan Wilhelmi. 18 January 2007. 10/13/09. 2. Outline. Who's involved. What's available ... Unidata's Internet Data Distribution/Local Data Manager system (IDD/LDM) ... – PowerPoint PPT presentation

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Title: TIGGE Archive at NCAR


1
TIGGE Archive at NCAR
  • THORPEX Town Hall _at_ AMS
  • Steven Worley, Douglas Schuster,
  • Nathan Wilhelmi
  • 18 January 2007

2
Outline
  • Whos involved
  • Whats available
  • Get Data
  • Discovery, Access, And Distribution
  • Use the Data, Analysis Tools
  • Work to be Done, Future User Services
  • Summary

3
Who - the archive centers
  • Archive Centers
  • NCAR
  • ECMWF
  • China Meteorological Administration (CMA)
  • Data Collection Mechanism
  • Unidatas Internet Data Distribution/Local Data
    Manager system (IDD/LDM)
  • Proven and scalable method.

4
Who - Current Data Providers
  • Who - Future Data Providers
  • Australia
  • China
  • Canada
  • Brazil
  • Korea
  • France

5
Whats Available
  • TIGGE Parameters
  • Four Level Types, aka file groupings
  • Single Level (includes surface)
  • Pressure Level (1000, 925, 850, 700, 500, 300,
    250, 200, 50 hPa)
  • Isentropic Level (320K)
  • Potential Vorticity Level (2 PVU)

6
Whats Available
  • Storage Strategy
  • Level Types separated by
  • Provider
  • Forecast time
  • All ensemble members and parameters for a Level
    Type in one file
  • Complete archive maintained on the NCAR Mass
    Store System as part of the CISL Research Data
    Archive (RDA)
  • Most current 2-3 weeks data online to network

7
Whats available
  • Summary of Data Providers

8
Whats Available
  • Type Pressure Level

9
Whats Available
  • Type Isentropic Level

Type Potential Vorticity Level
10
  • Type Single Level

11
  • Type Single Level Parameters cont.

12
Get Data Discovery, Access, and Distribution
  • TIGGE Web Portal (http//tigge.ucar.edu)
  • Users can search, discover, and download files
  • Select data by
  • initialization date/time
  • data provider
  • level type
  • forecast time
  • By agreement, 48 hour data access delay from
    model initialization time
  • Special project provision, IPO determination

13
Data Discovery Access and Distribution
http//tigge.ucar.edu
14
Data Discovery Access and Distribution
http//tigge.ucar.edu
15
Get Data Data Discovery Access and Distribution
  • NCAR Research Data Archive
  • http//dss.ucar.edu/datasets/ds330.0/ -2006
  • http//dss.ucar.edu/datasets/ds330.1/ -2007
  • The RDA dataset enables
  • Access to the complete TIGGE archive.
  • Easy use of the TIGGE archive on NCAR CISL
    computers data coming directly from the Mass
    Store System
  • NCAR computing accounts available upon request
  • Support staff to handle requests for offline data
  • Forecast file structure identical to online files

16
Data Discovery Access and Distribution
http//dss.ucar.edu/datasets/ds330.0
17
Data Discovery Access and Distribution
http//dss.ucar.edu/datasets/ds330.0
18
(No Transcript)
19
Use the Data, Analysis Tools
  • User Analysis and Basic Data Manipulation Tools
  • WMO GRIB2 is relatively new, so tools are
    immature
  • Forecasts with ensemble members add another
    dimension
  • Improvements underway in
  • NCAR Command Language (NCL)/Python
  • GEMPACK, GRIB-Java (Unidata)
  • NOAA tools (wgrib2, GRIB-2 software libraries,
    etc)
  • ECMWF GRIB API
  • http//tigge.ucar.edu/data-tools.htm

20
Work to be Done, Future User Services aka,
Steves discomfort zone
  • TIGGE Portal 2007 Improvements
  • Develop streaming download for multiple files
  • Interface to receive subset data requests (e.g.
    parameter selection), the delayed mode processing
  • Provide user selected grid interpolation across
    multiple models
  • Add spatial sub-setting functionality
  • Include subscription services for recurring
    requests
  • Continue improvement on tools
  • Provide web services for automated requests
  • Common interface for NCAR, ECMWF, and CMA

21
Summary
  • ECMWF and NCAR now archiving data from 4
    providers (ECMWF, NCEP, UKMO, JMA)
  • 6 more data providers plan to come online over
    2007 (Australia, Brazil, Canada, China, Korea,
    France)
  • The TIGGE archive and access system designed to
    accommodate irregularity between providers.
  • Desired 2007 Improvements include
  • Streaming download for multiple forecast files.
  • User specified sub-set/grid interpolation
    requests across multiple models.
  • A common web service interface for CMA, ECMWF,
    and NCAR for automated requests.

22
  • Questions
  • Contact Information
  • http//tigge.ucar.edu
  • worley_at_ucar.edu
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