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Enhancing Meteorological Interoperability in Boundary Conditions: Insights from the 2008 ECMWF Workshop

The 2008 ECMWF EUMETNET SRNWP Interoperability Workshop focused on critical advancements in meteorological boundary conditions. Presentations discussed successful tests with IFS and the integration of ALADIN/LACE, ARPEGE, and COSMO models. Key topics included the generation of boundary condition products, the challenges of timeliness, and the pre-processing needs for generating accurate files. Collaboration between various meteorological services was emphasized to ensure that boundary conditions could be disseminated effectively and meet operational requirements.

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Enhancing Meteorological Interoperability in Boundary Conditions: Insights from the 2008 ECMWF Workshop

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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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