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ALADIN

ALADIN. A transition year EWGLAM/SRNWP, Dubrovnik, 8/10/07. ALADIN 2006=>2007. Preparation of the ALADIN strategic 10 year plan Collective effort from: An ad-hoc ‘taskforce’ Policy Advisory Committee PM and an editing mini-group

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ALADIN

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  1. ALADIN A transition year EWGLAM/SRNWP, Dubrovnik, 8/10/07

  2. ALADIN 2006=>2007 • Preparation of the ALADIN strategic 10 year plan • Collective effort from: • An ad-hoc ‘taskforce’ • Policy Advisory Committee • PM and an editing mini-group • Final version hopefully available in November (quite needed to go to a multi/year planning structure (some lack of continuity in current long-term oriented efforts) • AROME preparing for 2008 operational implementation in Toulouse. • ALARO also (with some partial steps at ~10km [i.e. without 3MT yet], Cz, At …).

  3. News about AROME (as of Oct 07)‏ • Operational implementation schedule • Examples: the good and the bad • Outlook

  4. Operational implementation plan at MF 2007 2008 2009 R&D Doppler radar assimilation R&D reflectivity, convection & clouds assimilation dyn. adaptation test runs 3DVar assimilation test runs operational production Arome v1 preoperational test suite oper. prod. Arome v2 forecasters feedback & getting used to model behaviour optimisation on MF's NEC nowcasting & relocatable versions

  5. The Arome-France model config Arome-France current domain Aladin-France domain

  6. Some other AROMEs... Alps (MAP D-PHASE experiment)‏ ongoing test runs by HIRLAM partners (FMI, DMI, SMHI)‏ and some more (Hungary...)‏

  7. Short-range forecast improvement thanks to local data assimilation Here on a Paris thunderstorm case, missed by the lower resolution ALADIN assimilation, and by AROME in dynamical adaptation mode. The improvement comes from low-level SYNOP T,HU,wind obs obs dyn. adaptation fc from assimilation 3-h rain forecast

  8. A typical nice forecast of low clouds model cloudy areas

  9. A tendency to overpredict density currents near thunderstorms: under investigation

  10. A word about ALARO • The 10km mesh base-line is stabilised and is already operationally or (pre-operationally) implemented, with good objective scores, especially for precipitations. • The work on the 5km mesh convective package (integrated, prognostic and multi-scale-oriented => 3MT) is ongoing, hard (upper-air scores just at break-even) but promising.

  11. 3MT

  12. 3MT: precip. outcome (provisional) Without 3MT With 3MT

  13. Outlook (until next EWGLAM) • For AROME: • scientific work priorities: turbulence (i.e. numerical diffusion vs subgrid turbulence), physics/dynamics interaction in convective clouds, initialisation of precipitating clouds; • increase vertical resolution. • For ALARO: • Concretise the first good results with the full configuration; • Go back to check the scale independency again; • Create the conditions for a good oper support.

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