OZONE MEASUREMENTS IN ATMOSPHERE AND CORRELATIONS WITH BE-7 IN AN ITALIAN ALPINE VALLEY

Since 1990 our Institute has been conducting Be-7 measurements in the atmosphere in order to use it as a tracer for air coming from the uppe r layers of the atmosphere and for the stratospheric ozone. In this pa per we present the results on Be-7 measurements and ozone concentratio ns obtained with a one-year monitoring campaign carried out in Sondrio , an alpine town in Northern Italy. For a few interesting events corre lations between beryllium and ozone is observed. Be-7 reveals itself a s a good marker which reaches ground level during particularly rare ev ents such as stratospheric intrusions.