Articles | Volume 20, issue 15
Atmos. Chem. Phys., 20, 9183–9207, 2020
https://doi.org/10.5194/acp-20-9183-2020

Special issue: The CERN CLOUD experiment (ACP/AMT inter-journal SI)

Atmos. Chem. Phys., 20, 9183–9207, 2020
https://doi.org/10.5194/acp-20-9183-2020

Research article 03 Aug 2020

Research article | 03 Aug 2020

Molecular understanding of new-particle formation from α-pinene between −50 and +25 °C

Mario Simon et al.

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Latest update: 24 Oct 2021
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Short summary
Highly oxygenated organic compounds (HOMs) have been identified as key vapors involved in atmospheric new-particle formation (NPF). The molecular distribution, HOM yield, and NPF from α-pinene oxidation experiments were measured at the CLOUD chamber over a wide tropospheric-temperature range. This study shows on a molecular scale that despite the sharp reduction in HOM yield at lower temperatures, the reduced volatility counteracts this effect and leads to an overall increase in the NPF rate.
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