Articles | Volume 19, issue 9
Atmos. Chem. Phys., 19, 5973–5991, 2019
https://doi.org/10.5194/acp-19-5973-2019
Atmos. Chem. Phys., 19, 5973–5991, 2019
https://doi.org/10.5194/acp-19-5973-2019

Research article 07 May 2019

Research article | 07 May 2019

Impact of anthropogenic and biogenic sources on the seasonal variation in the molecular composition of urban organic aerosols: a field and laboratory study using ultra-high-resolution mass spectrometry

Kaspar R. Daellenbach et al.

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Short summary
Here we present the molecular composition of the organic aerosol (OA) at an urban site in Central Europe (Zurich, Switzerland) and compare it to smog chamber wood smoke and ambient biogenic secondary OA (SOA) (Orbitrap analyses). Accordingly, we are able to explain the strong seasonality of the molecular composition by aged wood smoke and biogenic SOA during winter and summer. Our results could also explain the predominance of non-fossil organic carbon at European locations throughout the year.
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