Hauptseite > Workflowsammlungen > Öffentliche Einträge > Organic condensation: a vital link connecting aerosol formation to cloud condensation nuclei (CCN) concentrations > print

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024 7 _ |a 10.5194/acp-11-3865-2011
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024 7 _ |a 2128/9938
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037 _ _ |a PreJuSER-20030
041 _ _ |a eng
082 _ _ |a 550
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|a Meteorology & Atmospheric Sciences
100 1 _ |0 P:(DE-HGF)0
|a Riipinen, I.
|b 0
245 _ _ |a Organic condensation: a vital link connecting aerosol formation to cloud condensation nuclei (CCN) concentrations
260 _ _ |a Katlenburg-Lindau
|b EGU
|c 2011
300 _ _ |a 3865 - 3878
336 7 _ |a Journal Article
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336 7 _ |a article
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440 _ 0 |0 9601
|a Atmospheric Chemistry and Physics
|v 11
|x 1680-7316
|y 8
500 _ _ |3 POF3_Assignment on 2016-02-29
500 _ _ |a Henry and Camille Dreyfus foundation, Maj and Tor Nessling foundation, Academy of Finland Centre of Excellence program (project no. 1118615) and the European Commission 7th framework programme EUCAARI (contract no. 036833-2) are acknowledged. The Egbert measurements were supported by Environment Canada and the Canadian Foundation for Climate and Atmospheric Sciences, through the CAFC network.
520 _ _ |a Atmospheric aerosol particles influence global climate as well as impair air quality through their effects on atmospheric visibility and human health. Ultrafine (< 100 nm) particles often dominate aerosol numbers, and nucleation of atmospheric vapors is an important source of these particles. To have climatic relevance, however, the freshly nucleated particles need to grow in size. We combine observations from two continental sites (Egbert, Canada and Hyytiala, Finland) to show that condensation of organic vapors is a crucial factor governing the lifetimes and climatic importance of the smallest atmospheric particles. We model the observed ultrafine aerosol growth with a simplified scheme approximating the condensing species as a mixture of effectively non-volatile and semi-volatile species, demonstrate that state-of-the-art organic gas-particle partitioning models fail to reproduce the observations, and propose a modeling approach that is consistent with the measurements. We find that roughly half of the mass of the condensing mass needs to be distributed proportional to the aerosol surface area (thus implying that the condensation is governed by gas-phase concentration rather than the equilibrium vapour pressure) to explain the observed aerosol growth. We demonstrate the large sensitivity of predicted number concentrations of cloud condensation nuclei (CCN) to these interactions between organic vapors and the smallest atmospheric nanoparticles highlighting the need for representing this process in global climate models.
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700 1 _ |0 P:(DE-HGF)0
|a Pierce, J.R.
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|a Yli-Juuti, T.
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700 1 _ |0 P:(DE-HGF)0
|a Nieminen, T.
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|a Häkkinen, S.
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|a Ehn, M.
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|a Junninen, H.
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|a Lehtipalo, K.
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|a Petäjä, T.
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700 1 _ |0 P:(DE-HGF)0
|a Slowik, J.
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700 1 _ |0 P:(DE-HGF)0
|a Chang, R.
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700 1 _ |0 P:(DE-HGF)0
|a Shantz, N.C.
|b 11
700 1 _ |0 P:(DE-HGF)0
|a Abbatt, J.
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|a Leaitch, W.R.
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|a Kerminen, V.-M.
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700 1 _ |0 P:(DE-HGF)0
|a Worsnop, D.R.
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|a Pandis, S.N.
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|a Donahue, N.M.
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700 1 _ |0 P:(DE-HGF)0
|a Kulmala, M.
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856 7 _ |u http://dx.doi.org/10.5194/acp-11-3865/2011/
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