Application of trajectory clustering for determining the source regions of secondary inorganic aerosols measured at K-puszta background monitoring station, Hungary

Ferenczi, Zita and Imre, Kornélia and Bozó, László (2018) Application of trajectory clustering for determining the source regions of secondary inorganic aerosols measured at K-puszta background monitoring station, Hungary. In: Air Pollution Modeling and its Application XXV. Springer, pp. 593-598. ISBN 978-3-319-57645-9

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Abstract

Understanding the formation process of atmospheric particles is vital be-cause of the significant impact of particulate matter on human health and climate change. Atmospheric particles can be formed by nucleation process via a number of different mechanisms, such as binary nucleation (involving H2SO4 and water va-pour), ternary nucleation (involving NH3, H2SO4 and water vapour) and ion-induced nucleation for charged particles, depending on the environmental conditions. Parti-cle formation increases the total number concentration of ambient submicron parti-cles and contributes thereby to climate forcing. The transformation processes of new particle formation (NPF) and secondary organic aerosol have been studied. It was found that gaseous sulphuric acid, ammonia, and organic compounds are important precursors to NPF events and H2SO4-NH3-H2O ternary nucleation is one of the im-portant mechanisms. Using cluster analysis on the backward trajectories makes it possible to identify the most relevant types of air mass transport routes, and the directions from where precursor gases are transported. The influence of synoptic-scale atmospheric transport patterns on observed levels of sulphate, nitrate and am-monium has been examined.

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