Sodankylä: The Finnish Meteorological Institute’s (FMI) Sodankylä facility (67°22’ N, 26°39’ E) hosts programs exploring upper air chemistry and dynamics, atmospheric column and profile measurements, snow/soil hydrology, biosphere-atmosphere interaction and satellite calibration-validation studies. The Sodankylä station contributes to Aeronet, NDACC, TCCON, GRUAN and other networks.  

At Sodankylä infrastructure is available for various atmospheric measurements. The services include:

- support for in situ balloon borne measurements of atmospheric composition. Examples are balloon-borne observations of atmospheric trace gases and aerosol properties. Regular radiosonde profiles are taken twice per 24 hours, at noon and at midnight. It is also possible to increase frequency of automated sonde launches for special observational periods.

- auxiliary ground-based observations are performed by various spectrometers dedicated to atmospheric composition measurements.