Research Unit on Physics, Chemistry and Biology of Atmospheric Composition and Climate Change

University of Helsinki, University of Kuopio and the Finnish Meteorological Institute
Headed by Professor Markku Kulmala
tel. +358 9 19150756 or kulmala@pcu.helsinki.fi

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The research unit is concerned to study the development and growth of small particles (aerosol particles) as well as their physical and chemical properties. Small particles have proved to be a significant uncertainty factor in the prediction of climate change. In addition small particles have undisputed health effects. Research is conducted in both experimental and theoretical settings. The research unit's core facilities include three field research stations and well-appointed aerosol laboratories. The growth of particles is influenced by physical, chemical, meteorological and biological conditions. For instance in forests photosynthesis produces carbohydrates, which following chemical reactions in the atmosphere can influence the birth and growth of aerosol particles. Among others the impact of increased carbon dioxide on this process is an important area of study.