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Proceedings Paper

Stratospheric ozone chemistry on ice surfaces
Author(s): Franz M. Geiger; Janice M. Hicks
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Paper Abstract

Surface second harmonic generation (SHG) allows detailed molecular measurements on a surface previously difficult to study: the ice/vacuum interface in equilibrium with its vapor. The heterogeneous reaction ClONO2 + H2O yields HOCl + HNO3, a key reaction in ozone-depletion mechanisms in the Antarctic stratosphere, was followed on the basal ice surface maintained under stratospheric conditions (185 K, 10-4 Torr water). SHG signals characteristic of the product HOCl allow us to determine reaction kinetics at various ClONO2 exposures and temperatures and in the presence of co-adsorbates. We find that the reaction is autocatalytic in HOCl.

Paper Details

Date Published: 30 April 1998
PDF: 10 pages
Proc. SPIE 3272, Laser Techniques for Surface Science III, (30 April 1998); doi: 10.1117/12.307115
Show Author Affiliations
Franz M. Geiger, Georgetown Univ. (United States)
Janice M. Hicks, Georgetown Univ. (United States)


Published in SPIE Proceedings Vol. 3272:
Laser Techniques for Surface Science III
Hai-Lung Dai; Hans-Joachim Freund, Editor(s)

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