Reactions of Halogen Species on Ice Surfaces

  • David R. Hanson
  • A. R. Ravishankara
Part of the NATO ASI Series book series (volume 7)


Halogen species play critical roles in the chemistry of ozone in the stratosphere. The roles played by bromine and chlorine in stratospheric ozone destruction via catalytic cycles have been studied extensively. These halogen species may also be important in the ozone chemistry of the Arctic troposphere [Barrie et al. 1988]. In particular, bromine chemistry has been implicated in the observed episodic destruction of tropospheric O3 in the Arctic spring. Such an O3 loss could be due to the liberation of bromine from inactive to active forms [Barrie et al., 1988; McConnell et al., 1992]. Conversion of inactive halogen species such as the hydrogen halides, chlorine nitrate, and bromine nitrate to forms that are capable of affecting the concentrations of tropospheric O3 are likely to take place over the ice surfaces which are present during polar winter and early spring. Yet, the heterogeneous processing of bromine compounds on ice surfaces has not been studied. Therefore, we have carried out a series of laboratory measurements to investigate the reactive and non-reactive uptake of atmospherically important halogenated species such as ClONO2, BrONO2, HCl, and HBr onto ice layers located on the inner wall of a cylindrical flow tube at 200(±10) K.


Hydrogen Halide Uptake Coefficient Active Bromine Arctic Spring Atmospheric Implication 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • David R. Hanson
    • 1
    • 2
  • A. R. Ravishankara
    • 1
    • 2
    • 3
  1. 1.Aeronomy LaboratoryNational Oceanic and Atmospheric AdministrationBoulderUSA
  2. 2.Cooperative Institute for Research in Environmental SciencesUniversity of ColoradoBoulderUSA
  3. 3.Department of Chemistry and BiochemistyUniversity of ColoradoBoulderUSA

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