Aerosol formation: atmospheric particles from organic vapours |
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| Authors: | O'Dowd Colin D Aalto Pasi Hmeri Kaarle Kulmala Markku Hoffmann Thorsten |
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| Institution: | Division of Atmospheric Sciences, Department of Physical Sciences, PO Box 64, University of Helsinki, 00014 Helsinki, Finland. colin.odowd@cmas.demon.co.uk |
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| Abstract: | Aerosol particles produced over forested areas may affect climate by acting as nuclei for cloud condensation, but their composition (and hence the chemical species that drive their production) remains an open question. Here we show, to our knowledge for the first time, that these newly formed particles (3-5 nm in diameter) are composed primarily of organic species, such as cis-pinonic acid and pinic acid, produced by oxidation of terpenes in organic vapours released from the canopy. |
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