Page 189 - Fundamentals of Air Pollution 3E

Questions 155

Smog Aerosols. A Digest of Results from the California Aerosol Characterization Experiment
(ACHEX)." Wiley, New York, 1980.
Keith, L. H., "Energy and Environmental Chemistry, " Vol. II, "Acid Rain." Ann Arbor
Science Publishers, Ann Arbor, MI, 1982.
Mathai, C. V. (ed.), "Visibility and Fine Particles," TR-17. Air Waste Management Association,
Pittsburgh, PA, 1990.
Suffet, I. H. (ed.), "Fate of Pollutants in the Air and Water Environments, "Part 2," Chemical
and Biological Fate of Pollutants in the Environment." Wiley, New York, 1977.
U.S. Environmental Protection Agency, "Protecting Visibility," EPA-450/5-79-008. Office of
Air Quality Planning and Standards, Research Triangle Park, NC, 1979.

QUESTIONS

1. Define threshold contrast.
2. List the four components which contribute to the extinction coefficient i> ext. Describe the
circumstances in which each component would dominate extinction.
3. Derive the Koschmieder relationship from Eq. (10-1).
4. Compare visibility measurements at a nearby airport with those of particle-free clean air.
5. Explain why stringent emission standards for particulate matter based on mass/heat input
will do little to improve visual air quality.
6. Explain the differences in visual air quality between the western and eastern portions of
the United States.
7. Compare the wavelengths of visible light with the range of particle diameters which most
efficiently scatter light.
8. Describe the impact of future visibility degradation on your area (e.g., on specific areas
of scenic attraction).
9. In the last decade, where have the greatest increases in rainfall acidity occurred in the
United States? What is the suspected reason?