The Izaña testbed is a high mountain observatory affiliated to the Izaña Atmospheric Research Centre (IARC) from the State Meteorological Agency of Spain (AEMET). The Izaña Observatory celebrates the 100-year anniversary in 2016. AEMET-IARC participates in several observational networks including:

  • SYNOP (surface synoptic observations) and radio/ozone sonde networks (since 1916)
  • WMO-GAW (Global Atmospheric Watch)
  • NDACC (Network for Detection of Atmospheric Composition Change)
  • TCCON (Total Carbon Column Observing Network)
  • BSRN (Baseline Surface Radiation Network)
  • AERONET (AErosol RObotic NETwork)
  • MPLNET (Micropulse Lidar NETwork)
  • E-GVAP (EUMETNET EIG GNSS water vapour programme)

Izaña Observatory hosts the WMO Regional Brewer Calibration Centre (RBCC) for Europe and Africa, is an absolute calibration site for AERONET, AERONET-Europe,  (China), PHOTONS (PHOtométrie pour le Traitement Opérationnel de Normalisation Satellitaire, France) and RIMA (Red Ibérica de Medida Fotométrica de Aerosoles, Iberia) photometer networks, and an absolute calibration site of the Physicalisch-Meteorologisches Observatorium Davos World Radiation Centre (PMOD-WRC). The IARC is also actively involved in the co-management of the WMO Sand and Dust Storm Warning Advisory and Assessment Regional Centre for Northern Africa, Middle East and Europe, hosted by AEMET and the Barcelona Supercomputing Centre (BSC). The Izaña Observatory has a long experience in hosting intensive instrument field campaigns and runs comprehensive programmes for monitoring and investigation of greenhouse gases, the ozone layer and related ozone depleting substances, reactive gases, solar radiation, and chemical and physical properties of atmospheric aerosols. Izaña also constitutes an international platform where specific measurements are used to assess observations made on board satellites and simulations from chemical transport models.