Review of model/obs/products

Models

• Fluxes– ECMWF fluxes will added v soon (Openshaw)

• UKMO Global model data– In testing

– Damian to provide more data

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)

Future products

• IWC from radar and lidar - CNRS– Tinel et al. (2000)

• Drizzle from radar and lidar – UoR– O’Connor (2004)

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

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

Comparison of model humidity

• Chilbolton

• 94 GHz

• January

Comparison of model humidity

• Chilbolton

• 94 GHz

• January

Palaiseau in summerChilbolton in winter

RMS error during winter month at 94 GHz

RMS error during summer month at 94 GHz

No problem at 35 GHz

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