Active sites in heterogeneous ice nucleation—the example of K-rich feldspars

Author:

Kiselev Alexei1,Bachmann Felix12,Pedevilla Philipp3,Cox Stephen J.3,Michaelides Angelos4,Gerthsen Dagmar2,Leisner Thomas15

Affiliation:

1. Atmospheric Aerosol Research Department, Institute for Meteorology and Climate Research (IMK-AAF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.

2. Laboratory for Electron Microscopy (LEM), KIT, Engesserstrasse 7, 76131 Karlsruhe, Germany.

3. London Centre for Nanotechnology, Thomas Young Centre, and Department of Chemistry, University College London (UCL), 17-19 Gordon Street, London WC1H 0AH, UK.

4. London Centre for Nanotechnology, Thomas Young Centre, and Department of Physics and Astronomy, UCL, 17-19 Gordon Street, London WC1H 0AH, UK.

5. Institut für Umweltphysik, Universität Heidelberg, Im Neuenheimer Feld 229, Heidelberg, Germany.

Abstract

From dust to ice How does ice form on the surfaces of aerosol particles? The process is important for climate and atmospheric properties but poorly understood at the molecular level, in part because the nature of the sites where ice growth begins is unclear. Kiselev et al. used electron microscopy and computer simulations to study the deposition of aligned ice crystals on feldspar, a major component of mineral dust (see the Perspective by Murray). Surface defects of the feldspar were responsible for its high ice-nucleation efficiency. Science , this issue p. 367 ; see also p. 346

Funder

European Union's Seventh Framework Programme

European Research Council

Engineering and Physical Sciences Research Council

London Centre for Nanotechnology

Karlsruhe Institute of Technology

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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