Skip to main content
eScholarship
Open Access Publications from the University of California

Kinetics of the BrO + ClO reaction and implications for stratospheric ozone

  • Author(s): Hills, AJ
  • Cicerone, RJ
  • Calvert, JG
  • Birks, JW
  • et al.
Creative Commons Attribution 4.0 International Public License
Abstract

The gas-phase reaction between BrO and CIO has been proposed as a potentially fast and synergistic mechanism of stratospheric ozone destruction. Further, it has been advanced1as a contributing factor to Antarctic springtime ozone column losses of ∼40% from 1960 to 19852,3Both dynamical4and chemical theories1,5-8have been advanced to explain the formation of the Antarctic 'ozone hole'. A major uncertainty in these theories has been the rate constant and product distribution of the BrO + ClO reaction as a function of temperature. Here we report the first direct measurements of these parameters. We show that this reaction could, indeed, account for a large fraction of the springtime ozone depletion over Antarctica and provide a source of chlorine dioxide of sufficient magnitude to explain the recent measurements of this species in the Antarctic stratosphere, provided that the stratosphere contains a sufficient quantity of bromine (∼20 p.p.t.v.). © 1987 Nature Publishing Group.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View