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TIGGE, TIGGE LAM and the GIFS T. Paccagnella (1), D. Richardson (2), D. Schuster(3),

TIGGE, TIGGE LAM and the GIFS T. Paccagnella (1), D. Richardson (2), D. Schuster(3), R. Swinbank (4), Z. Toth (3), S. Worley (3)………………. …………………………………………. (1) ARPA-SIMC, Italy (2) ECMWF, UK (3) NCAR, USA 4) Met Office, UK. TIGGE data.

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TIGGE, TIGGE LAM and the GIFS T. Paccagnella (1), D. Richardson (2), D. Schuster(3),

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  1. TIGGE, TIGGE LAM and the GIFS T. Paccagnella (1), D. Richardson (2), D. Schuster(3), R. Swinbank (4), Z. Toth (3), S. Worley (3)………………. ………………………………………….. (1) ARPA-SIMC, Italy (2) ECMWF, UK (3) NCAR, USA 4) Met Office, UK EGU 2011

  2. TIGGE data • A phased approach was chosen beginning with mirrored data collections of global medium-range ensemble forecasts from 10 NWP providers at three TIGGE Archive Centres: CMA, ECMWF, and NCAR. • TIGGE data is made available for research after a 48-hour delay. Near real-time access may be granted for specific projects through the THORPEX International Project Office. EGU 2011

  3. Ten of the leading global forecast centres are providing regular ensemble predictions to support research on predictability, dynamical processes and development of probabilistic forecasting methods. Summary of TIGGE database EGU 2011

  4. TIGGE ARCHIVES CHARACTERISTICS The TIGGE Archives have great value for the users, because standards for data format, parameter fields, and transfer protocols were internationally agreed upon at the start. • All data are archived at native resolution (on native grid when possible) • Data are interpolated on any limited-area lat-lon grid defined by the user just before download • Field names, definitions, units, accumulation times, etc… are fully standardized • Data gaps are continuously monitored and every effort is made to repair them quickly • Data can be obtained either in GRIB2 or NETCDF format (only from NCAR at the moment) • More functionalities will be installed (e.g. access to single point data, automatic requests, local calculation and plot generation, etc…) depending on user numbers, requests and funding

  5. TIGGE ARCHIVES CHARACTERISTICS • The ICT systems run 24 hours per day x 7 days per week, collecting data from the providers, validating the data integrity and completeness, and supporting user access. • Currently, the TIGGE archive is growing with more than over 1.7 M fields and 500 GB per day. • User activity continues to improve. Currently approximately 50 active users (submitting multiple requests) trigger data processing on 15 TB and download 1 TB monthly.

  6. TIGGE ARCHIVES CHARACTERISTICS • Fast user access to the complete archive, now 425 TB, is a technical challenge. • Delivery systems at ECMWF are fairly well suited to this challenge, while NCAR has found it necessary to place more data online and boost server side computational power. A new validation data portal is being designed and will be coupled to the TIGGE access portal at NCAR. Having the forecast fields and observations available from the same interface will further support the TIGGE program objectives.

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