Global and hemispheric average ozone, 1996-2002

by Wm. Robert Johnston
last updated 26 December 2002

Description: The lines show daily average ozone for these regions:

black, global (65°S to 65°N),
orange, northern hemisphere (0° to 65°N), and
blue, southern hemisphere (65°S to 0°).

The measurements are satellite based, from NASA's TOMS. Some missing values were filled by extrapolation.

Comments: The period covered by these measurements (6 years) is too short to show long term trends, but this data does show seasonal and short-term variation.

Source: NASA TOMS, on line.

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