Assessment Questions for Session 7

Choose the best answer:

  1. A layer of neutrally stable air develops over a stable (but turbulent) layer after sunset. What is the name for this neutral layer in the atmosphere?
    a) free atmosphere
    b) mixed layer
    c) nocturnal boundary layer
    d) residual layer

  2. Which of the following does NOT influence the height of the PBL?
    a) moisture
    b) Coriolis force
    c) energy budget
    d) buoyancy

  3. Researchers have determined the pollutants involved in the production of the acid rain and acid fog that adversely affect the vegetation of the Appalachain Mountains of the Carolinas originates in the Ohio Valley. What conclusions can you make concerning this form of deposition?
    a) This is an example of dry deposition
    b) This is an example of wet deposition
    c) This example does not represent pollutant removal based on the formal definition of pollutant removal. In order for a pollutant to be considered removed, it must make contact with the surface of the earth.
    d) While acid rain is considered wet deposition, acid fog is never associated with deposition or pollutant removal because the pollutants do not 'rain' out of the atmosphere as in the case of acid rain.

  4. How does the stable/nocturnal boundary layer influence pollutant dispersion?
    a) it traps pollutants near the surface, preventing effective dispersion
    b) it increases the rate of pollutant deposition because it does mix to high altitudes
    c) it increases the rate of pollutant dispersion because it reaches such high altitudes
    d) it prevents mixing of pollutants with the upper layer because it has a neutrally stable structure



      

On to Part 1: What is the PBL?

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