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024 7 _ |a 10.5194/acp-11-7839-2011
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|a Meteorology & Atmospheric Sciences
100 1 _ |0 P:(DE-HGF)0
|a Reitz, P.
|b 0
245 _ _ |a Surface modification of mineral dust particles by sulphuric acid processing: implications for ice nucleation abilities
260 _ _ |a Katlenburg-Lindau
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|c 2011
300 _ _ |a 7839 - 7858
336 7 _ |a Journal Article
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440 _ 0 |0 9601
|a Atmospheric Chemistry and Physics
|v 11
|x 1680-7316
|y 15
500 _ _ |3 POF3_Assignment on 2016-02-29
500 _ _ |a This work was conducted within the Helmholtz virtual institute on aerosol cloud interaction and supported by the Integration of European Simulation Chambers for Investigating Atmospheric Processes (EUROCHAMP) program as well as by the US National Science Foundation (Grant ATM-0611936). We thank all the participants of the FROST campaigns for their support and valuable discussions.
520 _ _ |a The ability of coated mineral dust particles to act as ice nuclei (IN) was investigated at LACIS (Leipzig Aerosol Cloud Interaction Simulator) during the FROST1- and FROST2-campaigns (Freezing of dust). Sulphuric acid was condensed on the particles which afterwards were optionally humidified, treated with ammonia vapour and/or heat. By means of aerosol mass spectrometry we found evidence that processing of mineral dust particles with sulphuric acid leads to surface modifications of the particles. These surface modifications are most likely responsible for the observed reduction of the IN activation of the particles. The observed particle mass spectra suggest that different treatments lead to different chemical reactions on the particle surface. Possible chemical reaction pathways and products are suggested and the implications on the IN efficiency of the treated dust particles are discussed.
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700 1 _ |0 P:(DE-HGF)0
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|a Niedermeier, D.
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700 1 _ |0 P:(DE-HGF)0
|a Hartmann, S.
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|a Petters, M.D.
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700 1 _ |0 P:(DE-HGF)0
|a Sierau, B.
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700 1 _ |0 P:(DE-HGF)0
|a Schneider, J.
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|t Atmospheric chemistry and physics
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856 7 _ |u http://dx.doi.org/10.5194/acp-11-7839-2011
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