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Original Research Papers

CCN activation of slightly soluble organics: the importance of small amounts of inorganic salt and particle phase

Authors:

Merete Bilde ,

University of Copenhagen, Department of Chemistry, Universitetsparken 5, DK-2100 Copenhagen, DK
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Birgitta Svenningsson

University of Copenhagen, Department of Chemistry, Universitetsparken 5, DK-2100 Copenhagen, DK
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Abstract

Using a static thermal-gradient diffusion cloud condensation nucleus chamber we study the effect of small amounts ofinorganic salts on the cloud droplet activation of two slightly soluble organic aerosol components (adipic and succinicacid) and experimentally confirm the two maxima predicted by Kóhler theory modified to take limited solubility intoaccount. Equally importantly we suggest (and confirm experimentally) that solid and liquid (supersaturated) particles ofslightly soluble organic compounds follow two different Kóhler curves and that knowledge about the particle phase andthereby the humidity history is important for interpretation of experimental data and modelling of the aerosol indirectclimate effect.

How to Cite: Bilde, M. and Svenningsson, B., 2004. CCN activation of slightly soluble organics: the importance of small amounts of inorganic salt and particle phase. Tellus B: Chemical and Physical Meteorology, 56(2), pp.128–134. DOI: http://doi.org/10.3402/tellusb.v56i2.16406
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  Published on 01 Jan 2004
 Accepted on 15 Aug 2003            Submitted on 26 Feb 2003

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