Atmospheric aerosols and ions

Atmospheric aerosols and ions Measuring atmospheric aerosols is a challenge due to the large variety in particle size, shape, concentration and composition. There is no single instrument, which could measure all the properties, and even the detection methods of the smallest sub-3 nm particles are still developing. We study for example the concentration, size distribution and optical propertied of atmospheric aerosols and ions. The group is focused especially on extending the measurement range down to molecular sizes, which is essential for studying new particle formation.

Research methods:

  • long-term field measurements on research stations (especially at SMEAR-stations Värriö, Hyytiälä ja Helsinki)
  • measurement campaigns around the world
  • laboratory experiments at our own facilities, or in collaboration with other research institutes or universities
  • instrument development
The members of the group have a versatile job description: planning, carrying out and monitoring field measurements and lab experiments, building, testing, programming and calibrating the instrumentation, analyzing and presenting the data, etc. Measurement campaigns and projects require extensive international co-operation. Our researchers get to travel to all corners of the world from Antarctica to the Amazon rainforest, conducting measurements at stationary sites (e.g. ground sites, masts, towers) as well as moving platforms such as cars, ships, trains, hot air balloons, aircraft, and zeppelins.

Group website