Observations of biogenic ion-induced cluster formation in the atmosphere

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http://hdl.handle.net/10138/237081

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Rose , C , Zha , Q , Dada , L , Yan , C , Lehtipalo , K , Junninen , H , Mazon , S B , Jokinen , T , Sarnela , N , Sipilä , M , Petäjä , T , Kerminen , V-M , Bianchi , F & Kulmala , M 2018 , ' Observations of biogenic ion-induced cluster formation in the atmosphere ' , Science Advances , vol. 4 , no. 4 , 5218 . https://doi.org/10.1126/sciadv.aar5218

Title: Observations of biogenic ion-induced cluster formation in the atmosphere
Author: Rose, Clémence; Zha, Qiaozhi; Dada, Lubna; Yan, Chao; Lehtipalo, Katrianne; Junninen, Heikki; Mazon, Stephany Buenrostro; Jokinen, Tuija; Sarnela, Nina; Sipilä, Mikko; Petäjä, Tuukka; Kerminen, Veli-Matti; Bianchi, Federico; Kulmala, Markku
Contributor: University of Helsinki, Department of Physics
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, Institute for Atmospheric and Earth System Research (INAR)
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, Institute for Atmospheric and Earth System Research (INAR)
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, Institute for Atmospheric and Earth System Research (INAR)
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, Institute for Atmospheric and Earth System Research (INAR)
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
Date: 2018-04-25
Language: eng
Number of pages: 10
Belongs to series: Science Advances
ISSN: 2375-2548
URI: http://hdl.handle.net/10138/237081
Abstract: A substantial fraction of aerosols, which affect air quality and climate, is formed from gaseous precursors. Highly oxygenated organic molecules (HOMs) are essential to grow the newly formed particles and have been evidenced to initiate ion-induced nucleation in chamber experiments in the absence of sulfuric acid. We investigate this phenomenon in the real atmosphere using an extensive set of state-of-the-art ion and mass spectrometers deployed in a boreal forest environment. We show that within a few hours around sunset, HOMs resulting from the oxidation of monoterpenes are capable of forming and growing ion clusters even under low sulfuric acid levels. In these conditions, we hypothesize that the lack of photochemistry and essential vapors prevents the organic clusters from growing past 6 nm. However, this phenomenon might have been a major source of particles in the preindustrial atmosphere and might also contribute to particle formation in the future and consequently affect the climate.
Subject: 114 Physical sciences
NUCLEATION MODE PARTICLES
BOREAL FOREST
SULFURIC-ACID
AEROSOL NUCLEATION
AMBIENT IONS
GROWTH-RATES
SIZE
PRODUCTS
SPECTROMETER
MOLECULES
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