Titel
Role of sesquiterpenes in biogenic new particle formation
Autor*in
Mario Simon
Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt am Main
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Abstract
Biogenic vapors form new particles in the atmosphere, affecting global climate. The contributions of monoterpenes and isoprene to new particle formation (NPF) have been extensively studied. However, sesquiterpenes have received little attention despite a potentially important role due to their high molecular weight. Via chamber experiments performed under atmospheric conditions, we report biogenic NPF resulting from the oxidation of pure mixtures of β-caryophyllene, α-pinene, and isoprene, which produces oxygenated compounds over a wide range of volatilities. We find that a class of vapors termed ultralow-volatility organic compounds (ULVOCs) are highly efficient nucleators and quantitatively determine NPF efficiency. When compared with a mixture of isoprene and monoterpene alone, adding only 2% sesquiterpene increases the ULVOC yield and doubles the formation rate. Thus, sesquiterpene emissions need to be included in assessments of global aerosol concentrations in pristine climates where biogenic NPF is expected to be a major source of cloud condensation nuclei.
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Science Advances
Band
9
Ausgabe
36
ISSN
2375-2548
Erscheinungsdatum
2023
Publication
American Association for the Advancement of Science (AAAS)
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
Rechteangabe
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