Aircraft observations of ozone in the Arctic troposphere in April 1994

This paper discusses the measurement data on tropospheric ozone concentrations obtained during the aircraft Arctic mission conducted in spring 1994 within the framework of the joint German-Russian research project ‘Arctic Haze’. Aircraft measurements of tropospheric ozone over the Arctic during April 1994 are presented. These data suggest a systematic destruction of boundary layer ozone over an expanse of the Arctic during the observational period. The data support current models of ozone destruction involving bromide and iodide reactions.