Quiet New Particle Formation in the Atmosphere

Atmospheric new particle formation (NPF) has been observed to take place in practice all around the world. In continental locations, typically about 10–40% of days are so-called NPF event characterized by a clear and growth that continue for several hours, occurring mostly during daytime. The other either non-event days, or which it is difficult decide whether had occurred not. Using measurement data from locations (Hyytiälä, Järvselja, near-city background city center Budapest), we were able show tends occur also on traditionally as days. One explanation instrument sensitivity towards low number concentrations sub-10 nm range, usually limits our capability detect such events. We found rates at 6 2–20% those traditional Growth newly formed particles very similar between This previously overlooked phenomenon, termed quiet NPF, contributes significantly production secondary atmosphere.