Tropospheric ozone depletion in the Arctic during spring. Measurements on the Zeppelin Mountain on Spitsbergen.

This report presents measurements of ozone, non-methane hydrocarbons, sulphate, ammonium, halocarbon and meteorological parameters from Spitsbergen in the Arctic. The focus is the rapid depletion of surface ozone in spring. Trajectories show that the ozone loss is mainly observed when the transport is from W-N. Ozone soundings and surface time series indicate that the loss process is of regional extent. The trace constituents indicate that hydrocarbons are chemically lost, as well as ozone, and that sulphate and ice particles may take part in the reactions.