Processes and properties of snow-air transfer in the high Arctic with application to interstitial ozone at Alert, Canada

摘要

Recent measurements of reactive chemical species in snow and firn at polar sites have served to underscore the importance of air-snow transfer processes in understanding changes in atmospheric chemistry. In this paper we present the first quantitative assessment of the impact of physical processes in the snow on air-snow chemical exchange of ozone. Measurements of snow properties, interstitial ozone concentrations, and an ozone kinetic depletion experiment results are presented along with two-dimensional model results of the diffusion and ventilation processes affecting gas exchange at Alert, Nunavut, Canada.