Location: 60°05′N, 17°29′E (30 km north of Uppsala)

The site was established in 1994.

Norunda is an ICOS combined atmosphere and ecosystem station, with ICOS activities operated by Lund University.

ACTRIS activities at Norunda is operated by Stockholm University.

Web site:

The Norunda research station is located some 30 km north of Uppsala in the southern part of the large boreal forest area. The surroundings are flat and vegetation is dominated by Norway spruce and Scots pine with a small fraction of deciduous trees, mainly birch. Forest stand is of various age (from 60 to 100 years) with mean height around 25 m. In 2022, an area of ca 80 ha around the main tower will be clear cut. This provides a unique research opportunity. Measurements from the last almost three decades of the forest's life cycle will be available by then, and we will monitor the start of a new forest life cycle. Lund University is responsible for the ICOS Sweden observations at Norunda, and ACTRIS activities is operated by Stockholm University. Science at Norunda is focused on biosphere-atmosphere interactions and exchanges of greenhouse gases (CO2 and CH4), energy and water. The central measurement facility at Norunda is a 102 m high tower where atmospheric state variables, turbulence and trace gases are observed at several levels.

ACTRIS observations were established at Norunda in 2018 replacing the Aspvreten station south of Stockholm, where aerosol observations were conducted since the 1980s. ACTRIS will benefit from already available well-equipped ICOS facilities including service facilities with workshop, accommodation and meeting room. The station is operated by Stockholm University (station PI Radovan Krejci) and research engineers (corresponding to one full time research engineer workload).