Stratospheric ozone chemistry on ice surfaces

Franz M. Geiger, Janice M. Hicks*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

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 → HOCl + HNO3, a key reaction in ozone-depletion mechanisms in the Antarctic stratosphere, was followed on the basal ice surface maintained under stratospheric conditions (185K, 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.

Original languageEnglish (US)
Pages (from-to)296-305
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3272
DOIs
StatePublished - Dec 1 1998
EventLaser Techniques for Surface Science III - San Jose, CA, United States
Duration: Jan 29 1998Jan 31 1998

Keywords

  • Adsorption
  • Desorption
  • Ice
  • Reaction
  • Second harmonic generation
  • Stratospheric ozone depletion
  • Vacuum techniques

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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