Atmospheric aerosols have been studied extensively due to the confirmed influence of aerosols on global climate, aerosol - clouds interactions, atmospheric visibility, human health etc. (Kerminen et al., 2005; IPCC, 2007; Wichmann et al., 2000). However, the uncertainties connected to the effects of aerosols on phenomena in the atmosphere are considerable - there are various sources of aerosol particles, having different chemical compositions and particle size distributions (PSD).
Concerning changes of PSD, the most important processes are new particle formation events (NPF).