Annele Virtanen

TL;DR: In this article, the phase state of secondary organic aerosol (SOA) particles was determined by the particle bounce behavior after inertial impaction on a polished steel substrate, which was evaluated as a function of relative humidity and SOA oxidation level (O / C) measured by an Aerodyne high resolution time of flight aerosol mass spectrometer.

TL;DR: In this article, the authors studied exhaust particle-size distribution of a heavy-duty diesel vehicle in the laboratory and on road and paid attention to the characteristics and formation tendency of nucleation mode.

TL;DR: Using a thermodenuder confirms that the nucleation mode particles are semivolatile in nature, and it is suggested that sulfuric acid is a main nucleating species in this situation, resulting from the effective conversion of SO2 to SO3 in the oxidation catalyst.

TL;DR: In this article, the hygroscopic growth of inorganic sea salt is investigated and it is shown that a reduction in hydrates leads to a reduction of aerosol-radiation interactions, manifested by a latitudinal-dependent reduction of the aerosol optical depth.

TL;DR: How NOx suppresses particle formation is shown, while HOMs, sulfuric acid, and NH3 have a synergistic enhancing effect on particle formation, elucidate the complex interactions between biogenic and anthropogenic vapors in the atmospheric aerosol system.