Ozone column at Arosa, Switzerland, 1925-2002

by Wm. Robert Johnston
last updated 26 December 2002

Description: The light green line indicates monthly measurements from Arosa, Switzerland, while the red line shows a twelve-month moving average for the same data. Measurements from 1925 to 1998 are ground based; measurements from 1999 to 2002 are satellite based (NASA TOMS) and may not be properly calibrated with the earlier data.

Comments: The graph shows the following:


© 2001, 2002 by Wm. Robert Johnston.
Last modified 26 December 2002.
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