Assimilation of CHAMP RO dtaa John de Vries jdevriesknmi.nl

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Assimilation of CHAMP RO dtaa John de Vries
(jdevries_at_knmi.nl)

• CHAMP CHAllenging Mini-satellite Payload
• GPS radio-occultation receiver
• Fig. A 4 to 15 per HIRLAM analysis cycle/area
• 45 m (_at_ 500hPa) to 60 m (_at_ 10 hPa) resolution
• Fig. B Only above 1 to 2 km (mid-latitudes)
• Refractivity translates into T, q, p
• Fig. C rms and bias
• HIRLAM
• Impact study over 1 month
• Var QC?
• Largely neutral (better bias, same RMS, so more
  stdev)

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Lead Centre on Verification methods

• Bologna meeting coordination of
  PEPS/verification
• Bayesian Model Averaging
• Workshop on Verification Methods
• in particular for probabilistic forecasts(?)
• 15-17 May 2006 (?)