Paper
Modelling molecular composition of SOA from toluene photo-oxidation at urban and street scales
Near-explicit chemical mechanisms representing toluene SOA formation are reduced using the GENOA algorithm and used in 3D simulations of air quality over Greater Paris and in the streets of a district near Paris.
Paper
Geometries, molecular Rayleigh scattering, Raman and infrared frequencies of polycyclic aromatic hydrocarbons and subunits of graphite studied by DFT methods
A computational investigation of geometric parameters, infrared (IR) and Raman frequencies as well as molecular Rayleigh scattering of polycyclic aromatic hydrocarbons (PAHs), used as models for subunits of larger graphitic materials.
Paper
Predicting glass transition temperature and melting point of organic compounds via machine learning and molecular embeddings
We developed tgBoost a machine learning model to predict glass transition temperature (Tg) of organic species considering their molecular structure and functionality for better predictions of the phase state of secondary organic aerosols.
Paper
The contribution of new particle formation and subsequent growth to haze formation
We investigated the contribution of atmospheric new particle formation (NPF) and subsequent growth of the newly formed particles, characterized by high concentrations of fine particulate matter (PM2.5).
Paper
Observed coupling between air mass history, secondary growth of nucleation mode particles and aerosol pollution levels in Beijing
Growth of nucleation mode particles, modulated by air mass exposure to anthropogenic emissions, plays an important role in pollution development.
Paper
Size-resolved characterization of organic aerosol in the North China Plain: new insights from high resolution spectral analysis
Size-resolved organic aerosol (OA) analysis elucidated largely different size distributions of primary and secondary OA, and oxidation states between urban and rural sites in different seasons.
Paper
A computationally efficient model to represent the chemistry, thermodynamics, and microphysics of secondary organic aerosols (simpleSOM): model development and application to α-pinene SOA
Secondary organic aerosols (SOA) constitute an important fraction of fine-mode atmospheric aerosol mass.
About this collection
This collection is intended to highlight the importance of aerosol particle formation in the urban atmosphere.
Guest-edited by Mikael Ehn, Katrianne Lehtipalo (University of Helsinki) and Paul Winkler (University of Vienna), this broad collection includes studies on new particle formation and growth mechanisms and rates, and the sources, transformations and chemical composition of aerosol precursor vapours, clusters, and particles. The impact of particle formation on air quality, health or climate is also covered.