[A-AS13] New particle formation and its impacts on atmospheric chemistry

[AAS13-05] How does NOx affect new particle formation from biogenic vapors

*Chao Yan¹ (1.University of Helsinki)

New particle formation (NPF) is a major source of ultrafine particles in the atmosphere. In continental boundary layer, sulfuric acid is believed to play a major role in NPF, and NOx does not have any direct influence on this process, as it does not affect the formation of sulfuric acid. However, it has been discovered that highly oxygenated organic molecules (HOMs) are also a key participator in NPF. As NOx is actively involved in the formation of HOMs, it subsequent influence can be expected. We will present detailed analysis on how NOx can alter the chemical composition of HOMs and in turn, its role on different stages of the NPF process.