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JOYCE Instrumentation

The majority of the JOYCE instruments is positioned on the roof of the Institut für Energie und Klimaforschung (IEK-8) at Forschungszentrum Jülich (50°54'30.77'' N, 6°24'48.73" E, 111 m MSL). The core instruments of JOYCE can be found below. Further instrumentation on the same observation platform includes a Pluvio rain gauge, a meteorological station (temperature, pressure, wind, humidity) and a MAX-DOAS system for trace gases and aerosol operated by IEK-8. All instruments are described below.

The two X-Band radars are located at Sophienhöhe (JuXPol, 4 km north-east of JOYCE) as well as at the Meteorological Institute of the University of Bonn (BoXPol).

Current and past JOYCE measurements can be found in our quicklook browser. Current radar images and animations can be found at the Meteorological Institute of the University of Bonn. Quicklooks from CloudNet processed measurements and products can be found on the CloudNet database.

 

Atmospheric Emitted Radiance Interferometer AERI

 
  • measures highly spectrally resolved infrared radiation
  • derivation of cloud particle size, cloud optical depth, temperature and humidity profile
  • details and measurement time series can be found here
 
Doppler Lidar
 
  • transmits and receives light pulses in the mear infrared spectral region
  • retrieves the wind vector (wind direction and velocity) up to 2-3 km height
  • details and measurement time series can be found here
 
Ceilometer CHM15k
 
  • trasmits and receives light pulses in the near infrared up to 15 km height
  • derivation of cloud base, detection of boundary layer height and aerosol layers
  • details and measurement time series can be found here
 
Ceilometer CT25k
 
  • trasmits and receives light pulses in the near infrared up to 7.5 km height
  • derivation of cloud base, detection of boundary layer height and aerosol layers
  • details and measurement time series can be found here
 

 
Cloud Radar JOYRAD-35
 
  • transmits and receives pulses of microwave radiation (35 GHz) in arbitrary direction
  • derivation of cloud thickness and cloud structure
  • details and measurement time series can be found here
 
Cloud Radar JOYRAD-94
  • transmits and receives continuously at 94 GHz pointing zenith
  • derivation and observation of cloud structure and micro-physical processes  
  • details and measurement time series can be found here
Microwave Radiometer HATPRO & IR Pyrometer
 
  • measures microwave radiation emitted by the atmosphere itself (HATPRO)
  • measures atmospheric broadband IR radiation (pyrometer)
  • derivation of cloud liquid water path, temperature profile, humidity profile, cloud base temperature
  • details and measurement time series can be found here
 
Micro Rain Radar MRR
 
  • measures vertical profiles of the Doppler spectrum of precipitation
  • derivation of vertical profiles of drop size distribution and from this precipitation rates
  • details and measurement time series can be found here
 
Multi-Filter Rotating Shadow Band Radiometer (MFRSR)
  • measures solar radiation at different wavelengths
  • derivation of aerosol optical depth and information on aerosol particle size as well as properties of liquid clouds (cloud optical depth, effective radius)
  • details and measurement time series can be found here
Precipitation Sensor Disdrometer
 
  • Parsivel (optical): measures size and fall velocity of rain drops at the surface
  • derivation of drop size distribution and from this the surface precipitation rate
  • details and measurement time series can be found here
  • in addition: Pluvio precipitation gauge (click here)
 
Radiation Sensors
 
  • pyranometer for downwelling solar radiation (direct and diffuse)
  • pyrgeometer for downwelling thermal radiation
  • actinic flux measurments (UV) for derivation of photolysis-frequencies
  • details and measurement time series can be found here
 
Sun Photometer CIMEL
 
  • sun photometer for measuring aerosol optical depth
  • details and measurement time series can be found here
 
Tower for Meteorological Measurements(120 m)
 
  • temperature, humidity and wind measurements at 8 heights
  • upwelling and downwelling flux density measurements at 2 heights
  • precipitation measurements at the surface
  • details and measurement time series can be found here
 
Total Sky Imager TSI
 
  • takes picture of the total upper hemisphere
  • provides a per-pixel classification of optically thin and thick clouds
  • derivation of cloud cover
  • details and measurement time series can be found here
 

X-Band Precipitation radars (BoXPol and JuXPol)
  • measure 3D polarimetric variables like reflectivity, phase shift, etc.
  • derivation of quantitative precipitation estimates
  • details and measurement time series can be found here