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