ACTRIS : European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases
EARLINET: European Aerosol Research Lidar Network to Establish an Aerosol Climatology
AERONET: AErosol RObotic NETwork
IAGOS: In-service Aircraft for a Global Observing System (European Research Infrastructure)
ICOS: Integrated Carbon Observation System (European Research Infrastructure)
ITaRS: Initial Training for Atmospheric Remote Sensing (EU FP7 Marie Curie Initial Training Network (ITN))
Cloudnet: A network of stations for the continuous evaluation of cloud and aerosol profiles in operational NWP models
EMEP: European Monitoring and Evaluation Programme
ICARE: Clouds Aerosol Water Radiation Interactions (Atmospheric Data and Service Centre)