Molecular identification of organic vapors driving atmospheric nanoparticle growth

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http://hdl.handle.net/10138/311931

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Mohr , C , Thornton , J A , Heitto , A , Lopez-Hilfiker , F D , Lutz , A , Riipinen , I , Hong , J , Donahue , N M , Hallquist , M , Petaja , T , Kulmala , M & Yli-Juuti , T 2019 , ' Molecular identification of organic vapors driving atmospheric nanoparticle growth ' , Nature Communications , vol. 10 , 4442 . https://doi.org/10.1038/s41467-019-12473-2

Title: Molecular identification of organic vapors driving atmospheric nanoparticle growth
Author: Mohr, Claudia; Thornton, Joel A.; Heitto, Arto; Lopez-Hilfiker, Felipe D.; Lutz, Anna; Riipinen, Ilona; Hong, Juan; Donahue, Neil M.; Hallquist, Mattias; Petaja, Tuukka; Kulmala, Markku; Yli-Juuti, Taina
Contributor: University of Helsinki, Stockholm University
University of Helsinki, Aerosol-Cloud-Climate -Interactions (ACCI)
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
University of Helsinki, University of Eastern Finland
Date: 2019-09-30
Language: eng
Number of pages: 7
Belongs to series: Nature Communications
ISSN: 2041-1723
URI: http://hdl.handle.net/10138/311931
Abstract: Particles formed in the atmosphere via nucleation provide about half the number of atmospheric cloud condensation nuclei, but in many locations, this process is limited by the growth of the newly formed particles. That growth is often via condensation of organic vapors. Identification of these vapors and their sources is thus fundamental for simulating changes to aerosol-cloud interactions, which are one of the most uncertain aspects of anthropogenic climate forcing. Here we present direct molecular-level observations of a distribution of organic vapors in a forested environment that can explain simultaneously observed atmospheric nanoparticle growth from 3 to 50 nm. Furthermore, the volatility distribution of these vapors is sufficient to explain nanoparticle growth without invoking particle-phase processes. The agreement between observed mass growth, and the growth predicted from the observed mass of condensing vapors in a forested environment thus represents an important step forward in the characterization of atmospheric particle growth.
Subject: NUCLEATION MODE PARTICLES
MULTIFUNCTIONAL COMPOUNDS
AEROSOL
VOLATILITY
OXIDATION
PRODUCTS
HYYTIALA
SIZE
GAS
THERMODYNAMICS
114 Physical sciences
119 Other natural sciences
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