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Interoperability with regard to Boundary Conditions

Interoperability with regard to Boundary Conditions. Alfred Hofstadler Meteorological Applications Section Operations Department ECMWF. Boundary Conditions. ALADIN/LACE ARPEGE Some tests with IFS (Hungary) Promising results Needs pre-processing to generate FA (Fichier ARPEGE)

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Interoperability with regard to Boundary Conditions

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  1. Interoperability with regard to Boundary Conditions Alfred Hofstadler Meteorological Applications Section Operations Department ECMWF EUMETNET SRNWP Interoperability Workshop 2008

  2. Boundary Conditions • ALADIN/LACE • ARPEGE • Some tests with IFS (Hungary) • Promising results • Needs pre-processing to generate FA (Fichier ARPEGE) • Timeliness issue • COSMO • GME: ARPA-SMR, DWD, IMGW • IFS: HNMS, Meteo Swiss, UGM, (LEPS) • HIRLAM • IFS EUMETNET SRNWP Interoperability Workshop 2008

  3. ECMWF Boundary Conditions • Optional Project • Four times a day at 00, 06, 12 and 18 UTC • Fully integrated into ECMWF operational system: • Main deterministic runs at 00 and 12 UTC cycles are used to generate Boundary Conditions products • Special BC runs at 06 and 18 UTC (identical configuration) • IFS: T799 (~25km) L91 (surface-80km) • 4D-Var with 6-hour data assimilation window • Forecast with 3-hourly post-processing 0-78 hours • Dissemination • Interpolation, rotation, frames, “bitmaps”, backup-products • GRIB only EUMETNET SRNWP Interoperability Workshop 2008

  4. EUMETNET SRNWP Interoperability Workshop 2008

  5. BC Products and Backup Products: Four times a day at 00, 06, 12 and 18 UTC FC-Steps An 6 12 78 84 90 BC Runs Products An 78 Backup +6 An 78 Backup +12 An 78 EUMETNET SRNWP Interoperability Workshop 2008

  6. ECMWF BC Schedule (from 29-02-2008) EUMETNET SRNWP Interoperability Workshop 2008

  7. ECMWF BC Interoperability Issues • Requirements not supported in Dissemination system: • Special GRIDs, FORMATs, …? Solutions: • Short term: framework for time-critical applications • Long term: modifications to production system • Timeliness: • ARPEGE and GME have shorter data cut-off Solutions: • Short term: use 06 and 18 UTC cycles • Long term: review production system • Access for non-ECMWF-BC members • EPS Boundary Conditions EUMETNET SRNWP Interoperability Workshop 2008

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