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Stratospheric Ozone Brent Greenhalgh and Carrie Welker Reviews in Earth Science Oct. 4, 2011. September 17, 1979. October 1, 2010. (NASA, 2011-1). Natural State of Stratospheric Ozone. Ozone (O 3 ) is very small part of atmosphere ~90% of ozone is in the stratosphere - PowerPoint PPT Presentation
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Stratospheric OzoneBrent Greenhalgh and Carrie Welker
Reviews in Earth ScienceOct. 4, 2011
September 17, 1979
October 1, 2010
(NASA, 2011-1)
Natural State of Stratospheric Ozone
Ozone (O3) 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 200-500 DU
UV radiation
O3
êO2 + O + heat
Natural variation of stratospheric
ozone1) 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, 2011-1)
Montreal Protocol & Projections
(U.N, n.d.)
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