Toward a better quantitative understanding of polar stratospheric ozone loss

Details Toward a better quantitative understanding of polar stratospheric ozone loss Toward a better quantitative understanding of polar stratospheric ozone loss

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3310812f&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 10, CiteID L10812

Physics

19

Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Global Change: Atmosphere (0315, 0325)

Scientific paper

Previous studies have shown that observed large O3 loss rates in cold Arctic Januaries cannot be explained with current understanding of the loss processes, recommended reaction kinetics, and standard assumptions about total stratospheric chlorine and bromine. Studies based on data collected during recent field campaigns suggest faster rates of photolysis and thermal decomposition of ClOOCl and higher stratospheric bromine concentrations than previously assumed. We show that a model accounting for these kinetic changes and higher levels of BrO can largely resolve the January Arctic O3 loss problem and closely reproduces observed Arctic O3 loss while being consistent with observed levels of ClO and ClOOCl. The model also suggests that bromine catalysed O3 loss is more important relative to chlorine catalysed loss than previously thought.

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