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| Titel |
Surface modification of mineral dust particles by sulphuric acid processing: implications for ice nucleation abilities |
| VerfasserIn |
P. Reitz, C. Spindler, T. F. Mentel, L. Poulain, H. Wex, K. Mildenberger, D. Niedermeier, S. Hartmann, T. Clauss, F. Stratmann, R. C. Sullivan, P. J. DeMott, M. D. Petters, B. Sierau, J. Schneider |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 15 ; Nr. 11, no. 15 (2011-08-03), S.7839-7858 |
| Datensatznummer |
250009978
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| Publikation (Nr.) |
 copernicus.org/acp-11-7839-2011.pdf |
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| Zusammenfassung |
| 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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