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001     42738
005     20240712101045.0
024 7 _ |a 2128/20922
|2 Handle
037 _ _ |a PreJuSER-42738
041 _ _ |a eng
082 _ _ |a 550
100 1 _ |a Laakso, L.
|b 0
|0 P:(DE-HGF)0
245 _ _ |a Kinetic nucleation and ions in boreal particle formation events
260 _ _ |a Katlenburg-Lindau
|b EGU
|c 2004
300 _ _ |a 3911 - 3945
336 7 _ |a Journal Article
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336 7 _ |a Output Types/Journal article
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336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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336 7 _ |a JOURNAL_ARTICLE
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336 7 _ |a article
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440 _ 0 |a Atmospheric Chemistry and Physics / Discussions
|x 1680-7367
|0 8621
|v 4
500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic model. A special emphasis is laid on air ion and charged aerosol dynamics. Model simulations indicate that kinetic nucleation of ammonia and sulphuric acid together with condensation of sulphuric acid and low-volatile organic vapours onto clusters and particles explain basic features of particle formation events as well as ion characteristics. However, an observed excess of negative ions in the diameter range 1.5-3 nm and overcharge of 3-5 nm particles demonstrate that ions are also involved in particle formation. These observations can be explained by preferential condensation of sulphuric acid onto negatively charged clusters and particles and/or contribution of ion-induced nucleation on particle formation. According to model simulations, which assume that the nucleation rate is equal to the sulfuric acid collision rate, the relative contribution of ion-based particle formation seems to be smaller than kinetic nucleation of neutral clusters. Conducted model simulations also corroborate the recently-presented hypothesis according to which a large number of so-called thermodynamically stable clusters (TSCs) having a diameter between 1-3 nm exist in the atmosphere. TSCs were found to grow to observable sizes only under favorable conditions, e. g. when the pre-existing particle concentration was low.
536 _ _ |a Chemie und Dynamik der Geo-Biosphäre
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588 _ _ |a Dataset connected to Web of Science
650 _ 7 |a J
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700 1 _ |a Anttila, T.
|b 1
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700 1 _ |a Lehtinen, K.
|b 2
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700 1 _ |a Aalto, P.
|b 3
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700 1 _ |a Kulmala, M.
|b 4
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700 1 _ |a Horrak, U.
|b 5
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700 1 _ |a Paatero, J.
|b 6
|0 P:(DE-HGF)0
700 1 _ |a Hanke, M.
|b 7
|0 P:(DE-HGF)0
700 1 _ |a Arnold, F.
|b 8
|0 P:(DE-HGF)0
773 _ _ |g Vol. 4, p. 3911 - 3945
|p 3911 - 3945
|q 4<3911 - 3945
|0 PERI:(DE-600)2069857-4
|t Atmospheric chemistry and physics / Discussions
|v 4
|y 2004
|x 1680-7367
856 4 _ |u https://juser.fz-juelich.de/record/42738/files/acpd-4-3911-2004.pdf
|y OpenAccess
856 4 _ |u https://juser.fz-juelich.de/record/42738/files/acpd-4-3911-2004.pdf?subformat=pdfa
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909 C O |o oai:juser.fz-juelich.de:42738
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913 1 _ |k U01
|v Chemie und Dynamik der Geo-Biosphäre
|l Chemie und Dynamik der Geo-Biosphäre
|b Environment (Umwelt)
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914 1 _ |y 2004
915 _ _ |a No peer review
|0 StatID:(DE-HGF)0020
915 _ _ |a OpenAccess
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920 1 _ |k ICG-II
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|d 31.12.2006
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981 _ _ |a I:(DE-Juel1)ICE-3-20101013
981 _ _ |a I:(DE-Juel1)IEK-8-20101013

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