ACTRIS Sweden -

ACTRIS Sweden (Aerosols, Clouds, and Trace gases Research Infra­structure)


Research areas and keywords

UKÄ subject classification

  • Natural Sciences

Type of infrastructure

  • Digital collections
  • Services
  • Equipment


  • aerosol, cloud, reactive trace gases, climate, air quality

Name of national/international infrastructure this infrastructure belongs to

ACTRIS (Aerosols, Clouds, and Trace gases Research Infra­structure)


ACTRIS Sweden is the Swedish part of a distributed pan-European environmental research infrastructure for providing data and research infrastructure services of long-term quality-assured observations of short-lived climate-forcing pollutants including aerosols and clouds. ACTRIS Sweden is on the Swedish national infrastructure roadmap. ACTRIS Sweden sites are co-located with the ICOS-Sweden observations at the tall tower sites at Hyltemossa in southern Sweden and Norunda outside Uppsala.
The pan-European ACTRIS RI has evolved and matured over a number of years with an estimated capital value investment amounting to 450 M€ and running costs of 6 M€/year. ACTRIS RI includes National Facilities in 21 European countries with more than 80 observational platforms and field stations distributed widely across Europe. In 2016, ACTRIS was granted an ESFRI status as a European strategic research infrastructure and is currently moving from an EU infrastructure project (ACTRIS-2, May 2015 – April 2019, 21 EU countries) towards an ACTRIS ERIC by means of an EU PPP (Preparatory Phase Project, Jan 2017- Dec 2019).

Equipment and resources

ACTRIS Sweden long-term continuous observations include: PM10/PM2.5, aerosol size distributions (AIS: 0.5–20 nm; DMPS: 3–850 nm; APS: 0.5–15 µm), particle light absorption (7-λ Aethalo­meter and MAAP), particle light scattering (3-λ nephelometer), cloud condensation nuclei (CCN counter), aerosol chemical composition (ToF-ACSM) and OC/EC filter sampling and analysis (ACTRIS standards). Gas measurements include NO/NO2 and O3. We are analyzing also for organic tracers and 14C for organic aerosol source apportionment purposes. Campaign-wise ACTRIS-related measurements include: aerosol fluxes (EC + gradient), soot (SP-AMS, SP2), particle effective density (DMA-APM), Ice Nuclei (PINC). ICOS observation directly supporting ACTRIS are mainly: boundary layer height (ceilometer) and various micrometeorological observations.

Digital and physical collections

All ACTRIS data are submitted on a yearly basis to the ACTRIS Data Portal (, where data are available in full open access.

Services provided

Physical access is provided to the ACTRIS Sweden sites. The data collected within ACTRIS consist of some 100 000 data sets that are all freely available in full open access.

Management of the infrastructure

ACTRIS Sweden Steering Committee: (Research-performing organizations, RPO) Lund University, Prof Erik Swietlicki; Stockholm University, Prof Hans-Christen Hansson; Gothenburg University, Prof Mattias Hallquist; Swedish University of Agricultural Sciences - Umeå, Prof Mats B Nilsson; Swedish Meteorological and Hydrological Institute SMHI, PhD Anke Thoss; Uppsala University, Prof Anna Rutgersson. Adjunct Steering Committee members: ICOS Sweden, Coordinating director Dr Maj-Lena Linderson.

Available for loan

Available for loan - internal and external

Terms of access:

Physical access to the sites is free of cost, limited by ICOS and ACTRIS long-term activities and required technical support. TNA to Hyltemossa and financial support is regulated by the ACTRIS TNA procedure. Virtual access to the acquired data is available in open access through the ACTRIS database ( The ACTRIS Data Policy ( regulates the sharing and use of ACTRIS data.