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Author Question: Which of the following meteorological settings is most favorable for severe air pollution? A) ... (Read 67 times)

james

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on: Jul 14, 2018
Which of the following meteorological settings is most favorable for severe air pollution?
 
  A) strong wind; inversion; stable
  B) light wind; isothermal; stable
  C) light wind; inversion; unstable
  D) strong wind; lapse; unstable

Question 2

Describe the important aspects of wind speed and direction on dispersal of air pollution.
 
  What will be an ideal response?


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Tabitha_2016

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: C

Answer to Question 2

Answer: Strong winds aid in the dispersal of pollutants in two ways. First, they rapidly transport emissions from their source and spread them over a wide horizontal extent. Greater wind speeds also lower the pollution concentration indirectly. Recall from Chapter 3 that air does not flow uniformly in a given direction. Instead, it contains small, swirling motions, called eddies, that mix the air vertically. This forced convection increases with wind speed and, as a result, strong winds favor greater vertical dispersion. Short-term variations in wind direction also affect dispersion. If the wind direction varies only slightly through time, pollution will be concentrated within a relatively narrow area downwind of the source. If wind directions are highly variable, the pollutants will spread out over a wider area.


james

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Reply 2 on: Jul 14, 2018
Gracias!

nguyenhoanhat

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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