Stratospheric Ozone Brent Greenhalgh and Carrie Welker Reviews in Earth Science Oct. 4, 2011 September 17, 1979 October 1, 2010 (NASA, 2011-1)

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Presentation transcript:

Stratospheric Ozone Brent Greenhalgh and Carrie Welker Reviews in Earth Science Oct. 4, 2011 September 17, 1979 October 1, 2010 (NASA, )

Natural State of Stratospheric Ozone Ozone (O 3 ) is very small part of atmosphere ~90% of ozone is in the stratosphere Protects life from solar UV radiation Inverse T profile in stratosphere Total ozone ranges from DU UV radiation O 3  O 2 + O + heat

Natural variation of stratospheric ozone 1) Air Motions Ozone changes with latitude from stratospheric wind patterns Weather systems 2) Chemical 11-year solar cycle causes 1-2% change in ozone Volcanic eruptions deplete ozone for a few years

Anthropogenic Change (NASA, )

Montreal Protocol & Projections (U.N, n.d.)