25.Ozone.depletion.11

25.Ozone.depletion.11 - Refrigerators and Ozone Depletion...

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Unformatted text preview: Refrigerators and Ozone Depletion Structure of the Atmosphere Ozone in the Troposphere and Stratosphere Ozone Depletion Health/Environmental Effects Summary and Conclusions Sunlight and the Electromagnetic Spectrum Shorter wavelengths contain more energy UV Ozone filters wavelengths below 290 nm The Ozone Layer Absorbs Harmful UV Rays Filtering is protective for all life forms Ozone in the Troposphere Undesirable Produced by electric motors and reactions between NOx and volatile organic chemicals Sources of NOx include engines and other combustion Sources of VOCs include engine exhaust and green plants Ozone in the Stratosphere Desirable Ozone filters UV, converting it to less dangerous IR Ozone Layer and the Atmosphere Normally temperature and pressure are directly related Altitude is usually accompanied by a drop in pressure However, ozone in the stratosphere reverses the trend The Chlorofluorocarbons Refrigerants air conditioners and refrigerators Spray propellants aerosol cans Plastic foam blowing styrofoam Ozone-Depleting Chemicals Over Time Chain-Reaction Ozone Destruction by Nitric Oxide NO in the stratosphere can deplete ozone Chain-Reaction Ozone Destruction by Freons Chlorine radical in the stratosphere can also deplete ozone Ozone Depletion Most Severe at the Poles Arctic Ozone Averages Since 1979...
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25.Ozone.depletion.11 - Refrigerators and Ozone Depletion...

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