Since Friday 19 November, the team at PEA is launching every second day a weather balloon with a radiosonde for measuring the vertical profile of temperature, relative humidity, wind and pressure. At the moment, the Antarctic ozone hole has started to be 'filled up' again. However, yesterday's radio sounding happened inside the Antarctic polar vortex, with very high wind speeds between 15 and 20 km altitude, strong westerly winds and low temperature - as can be seen on the graph below (note however, that the humidity values above around 10 km are only indicative). Total ozone was also very low respectively, with values between 150 and 200 DU.
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