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LACE DA working days 28-30 September 2010, Ljubljana Local data assimilation system in Slovenia.

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Presentation on theme: "LACE DA working days 28-30 September 2010, Ljubljana Local data assimilation system in Slovenia."— Presentation transcript:

1 LACE DA working days September 2010, Ljubljana Local data assimilation system in Slovenia

2 LACE DA working days September 2010, Ljubljana Facts 4.4 km, 43 levels 439*421 points / * km Aladin cy35t1 ALARO 3MT Timestep: 180s 3h ARPEGE LBC

3 LACE DA working days September 2010, Ljubljana Observations All OPLACE observations, except METOP and NOAA-19 local NON-GTS SYNOP data No assimilation of SYNOP T2m and RH2m in 3DVAR

4 LACE DA working days September 2010, Ljubljana SMS assimilation suite

5 LACE DA working days September 2010, Ljubljana ODB / bator Merge of locally prepared obsoul and OPLACE for conv Created by subbases: conv amdr geow wpro sats sevb Fix in BATOR to avoid crash in case of no observations selected by lamflag Blacklisting not modified (from Hungary)

6 LACE DA working days September 2010, Ljubljana Screening & minimization Constant bias correction: VARBC tested, but not yet sufficiently validated NITER=70, NSIMU=80 B matrix computed for July 2007 (~ 450 forecast differences), (downscaled) ensemble method REDNMC=1.3 (not tuned yet)

7 LACE DA working days September 2010, Ljubljana Verification 2m RH and T assimilation? FF 700 Z 700 T 850

8 LACE DA working days September 2010, Ljubljana Status Real-time operational cycle Production cycle is delayed / not regular

9 LACE DA working days September 2010, Ljubljana Problems Packing bug – Negative Ts at some grid point – Disappears if fields not packed (NVGRIB=0) – Reproducible on some clusters, on others not – Final solution: not pack surface fields (~10 % increase in file size)

10 LACE DA working days September 2010, Ljubljana Developments I LSAF Albedo

11 LACE DA working days September 2010, Ljubljana Developments II Snow assimilation (CANARI + LSAF)

12 LACE DA working days September 2010, Ljubljana Near future tasks Production suite + visualization and verification in operations Validate VARBC Improve observational usage Estimate/tune observational and background errors Add CANARI snow analysis Test and validate 3 hour RUC

13 LACE DA working days September 2010, Ljubljana Longer term Assimilate aircraft data, collected by a radar in Ljubljana airport (not really AMDAR) Test IASI and probably use it (will have 1py in )


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