GG140: The Atmosphere, The Ocean, and Environmental Change
Lecture 31 - The Two Ozone Problems. There are two ozone problems in the atmosphere. Tropospheric ozone in the form of photochemical smog is sometimes dangerously high whereas stratospheric ozone concentration is sometimes dangerously low. Photochemical smog is created through chemical reactions between UV radiation from the run and nitrogen oxides that are emitted from automobiles. High concentrations of tropospheric ozone are dangerous because of the damage ozone can cause to a person's airway if it is inhaled. The EPA has specified limits of ozone concentration but several counties in the USA exceed these limits. The primary air pollutants from which ozone is created have a peak concentration twice a day typically, which is associated with rush hour times during the day. (from oyc.yale.edu)
| Lecture 31 - The Two Ozone Problems |
| Time | Lecture Chapters |
| [00:00:00] | 1. Air Pollutants |
| [00:06:05] | 2. Two Ozone Problems |
| [00:07:08] | 3. Ozone Properties |
| [00:11:20] | 4. Photochemical Smog |
| [00:15:16] | 5. Ozone Concentration Limits |
| [00:25:10] | 6. Creation of Ozone Pollution |
| [00:26:41] | 7. Primary Pollutants |
| References |
| Lecture 31 - The Two Ozone Problems Instructor: Professor Ronald B Smith. Resources: Credit List [PDF]. Transcript [html]. Audio [mp3]. Download Video [mov]. |
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