Ozone Hole

Ozone "Hole" September 12, 2010

September 16 was the 12th anniversary of the signing of the Montreal Protocol, which set up a framework for limiting the production and use of CFCs and other ozone-depleting chlorine and bromine substances.

The annual “maximum” of ozone-depletion begins in August and reaches its “peak” at the end of September-beginning of October. So far this year the “hole” has been slightly less than the annual average of the years 1979-2009.

The Ozone Monitoring Instrument on NASA’s Aura satellite acquired data for this map of ozone concentrations over Antarctica on September 12, 2010.

NASA maintains an up-to-date Ozone Watch Page.

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