Due to political disturbances in Venezuela we operated our instrument at the Environmental Research Station Schneefernerhaus (Umwelt Forschungsstation Schneefernerhaus, UFS) on mount Zugspitze (47.4°N, 11°E, 2650 m a.s.l.) from 12 February to 28 July 2003.

For more information about the UFS see www.schneefernerhaus.de. 

Here you can find the latest picture taken by the UFS webcam which is viewing in the same direction as our radiometer. 

Figure 2 shows the time series of ozone vmr profiles (upper panel), ozone column amounts (middle panel), and nitrous oxide (lower panel).

Around day 79 the edge of the polar vortex was over mount Zugspitze, resulting in decreasing maximum ozone mixing ratios and descending N₂O isopleths. No increase of the ozone column amounts could be observed which might be caused by chemical ozone depletion inside the vortex and the vortex edge region.

From spring to summer effects of the buoyancy in the atmosphere can be seen.