Review of model/obs/products

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Review of model/obs/products
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Models

• Fluxes
• ECMWF fluxes will added v soon (Openshaw)
• UKMO Global model data
• In testing
• Damian to provide more data

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New products

• IWC from radar and lidar Gerd-Jan (KNMI)
• Donovan (2003)
• IWC from radar and Doppler velocity UoR
• Matrosov et al. (2002)
• Cloud fractions Malcolm Brooks (UoR/UKMO)

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Future products

• IWC from radar and lidar - CNRS
• Tinel et al. (2000)
• Drizzle from radar and lidar UoR
• OConnor (2004)

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Potential products

• IWC and air velocity from radar CNRS
• LWC from radar and lidar TUD
• LWC from radar and lidar UoR
• IWC/LWC from dual-wavelength - UoR

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Comparison of model humidity

• Attenuation of radar due to water vapour (and
  other gases) calculated from model parameters
  using mwpp package (R. Hogan)
• Truth difficult to ascertain
• Raman humidity data sparse will check this
• Choose one model, compute relative RMS error of
  other models

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Comparison of model humidity

• Chilbolton
• 94 GHz
• January

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Comparison of model humidity

• Chilbolton
• 94 GHz
• January

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Palaiseau in summer
Chilbolton in winter
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RMS error during winter month at 94 GHz
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RMS error during summer month at 94 GHz
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No problem at 35 GHz
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Version control

• Model is stable
• Check fluxes
• Additions only
• Categorization is semi-stable
• Calibration issues
• Improve clutter rejection
• Improve bright-band detection
• Products
• Cloud fraction ok
• Reliance on calibration