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Identification of Ice Nucleation Active Sites on Feldspar Dust Particles

Autor(en)
Tobias Zolles, Julia Burkart, Thomas Häusler, Berhard Pummer, Regina Hitzenberger, Hinrich Grothe
Abstrakt

Mineral dusts originating from Earth’s crust are known to be important atmospheric ice nuclei. In agreement with earlier studies, feldspar was found as the most active of the tested natural mineral dusts. Here we investigated in closer detail the reasons for its activity and the difference in the activity of the different feldspars. Conclusions are drawn from scanning electron microscopy, X-ray powder diffraction, infrared spectroscopy, and oil-immersion freezing experiments. K-feldspar showed by far the highest ice nucleation activity. Finally, we give a potential explanation of this effect, finding alkali-metal ions having different hydration shells and thus an influence on the ice nucleation activity of feldspar surfaces.

Organisation(en)
Aerosolphysik und Umweltphysik
Externe Organisation(en)
Technische Universität Wien
Journal
The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory
Band
119
Seiten
2692–2700
Anzahl der Seiten
9
ISSN
1089-5639
DOI
https://doi.org/10.1021/jp509839x
Publikationsdatum
01-2015
Peer-reviewed
Ja
ÖFOS 2012
105904 Umweltforschung, 207107 Luftreinhaltung, 103039 Aerosolphysik, 103008 Experimentalphysik
ASJC Scopus Sachgebiete
Physical and Theoretical Chemistry
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/0de4471f-d802-486f-99f7-f00f0fb9e89c