The distribution of sulfur dioxide over the Norwegian Arctic Ocean during summer

Abstract

Measurements of atmospheric sulfur dioxide performed during the Swedish expedition “Ymer80” i n the Arctic are presented. Wet chemical filter sampling and subsequent chemiluminescenceanalysis enabled detection in the low pptv range. SO₂ mixing ratios between 5 pptv and 100 pptv were measured. SO₂ values over the closed ice sheet were usually lower than over the openocean. Possible source and sink mechanisms are discussed. The influence of atmospherictransport is shown by trajectory analysis and helicopter ascents.