Primary aims of Cloud and Water Vapour Experiment for Model Comparisons (CWAVE '03):

• Validation and inter-comparison of cloud and water vapour measurements from satellite, with remotely sensed ground based measurements of cloud parameters and water vapour.
  
  
• Comparison of measured cloud parameters and water vapour, with results from high resolution Unified Model (UM) run by the Met Office.

The CWAVE '03 measurement campaign at the STFC-Chilbolton Observatory (12th June to 11th July 2003); was undertaken in support of activities associated with two EC Framework 5 projects, CLOUDMAP2 and CLOUDNET. A wide range of satellite and ground based instruments measured a variety of atmospheric properties ranging from cloud parameters to water vapour. The availability of output parameters from a Met Office high resolution Unified Model (UM) centred on Chilbolton meant that comparisons could be made between observed and modelled data.

Instruments that contributed to CWAVE '03

(1) Earth observation measurements:

Satellite instruments and platforms:

• AATSR - ENVISAT
• MODIS - TERRA and AQUA
• MISR - TERRA
• MERIS - ENVISAT
• MIPAS - ENVISAT
• SEVERI - MSG

(2) Ground-based measurements from Chilbolton

Radars:

• 94 GHz Doppler radar (GALILEO)
• 35 GHz Doppler radar (COPERNICUS)
• 3 GHz Multi parameter radar (CAMRa)

Lidars:

• IR lidar ceilometer (905nm)
• UV Raman lidar (355nm)
• Depolarisation lidar (green)

Radiometers:

• Water vapour profiling microwave radiometer
• Three frequency microwave radiometer (RMR)
• Pyranometer
• Pyrgeometer
• Visible spectroradiometer
• FTIR spectrometer
• Sun photometer

Imagers:

• Whole sky imager (thermal IR) [ASTIC320]
• Stereo cloud imaging system
• Imaging polarimeter
• Sky imager (visible)

Additional observations:

• GPS receivers (3 off)
• Distrometer
• Rainfall rate gauges
• Air temperature
• Relative humidity
• Wind speed
• Wind direction

Radiosonde ascents:

• From Larkhill, which is 35 km to the West of Chilbolton.

Campaign participants

Organisers:

• STFC-Rutherford Appleton Laboratory

Participants:

• JCMM/Met Office
• ETH, Switzerland
• University of Bath (Elec. & Elec. Engineering)
• University College London (Geomatics)
• University of Hertfordshire (Physical Sciences)
• University of Leicester (Chemistry)
• University of Oxford (AOPP)
• University of Reading (Meteorology and Physics)

Presentation giving further details (PDF - 1874kB - link opens in a new window) about CLOUDMAP2