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atm.chm.ac.uk/tour/index.html

Courtesy of the Centre for Atmospheric Sciences, Cambridge University. http://www.atm.ch.cam.ac.uk/tour/index.html. What is ozone?. Ozone forms a layer in the stratosphere, thinnest in the tropics (around the equator) and denser towards the poles measured in Dobson units (DU)

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atm.chm.ac.uk/tour/index.html

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  1. Courtesy of the Centre for Atmospheric Sciences, Cambridge University http://www.atm.ch.cam.ac.uk/tour/index.html

  2. What is ozone? • Ozone forms a layer in the stratosphere, thinnest in the tropics (around the equator) and denser towards the poles • measured in Dobson units (DU) • ~260 DU near the tropics

  3. What is a Dobson unit? • 1 Dobson Unit (DU) is defined to be 0.01 mm thickness at STP - (0C and 1 atmos press). • A slab 3mm thick corresponds to 300 DU

  4. One chlorine atom - average - destroys one thousand ozone molecules before converted into form harmless to ozone

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