2.6. Stability Classes

Try these first

1. 1.

   What is the significance of measuring wind speed at stack height?

   Hint

   Think about how pollutants spread.

2. 2.

   What would stability class 'A' indicate?

   Hint

   Consider what conditions would make the air actively mix.

3. 3.

   Which class indicates very unstable atmospheric conditions?

   • A
   • D
   • F

   Hint

   Remember the types of stability classes.

4. 4.

   True or False: Sigma parameters are not affected by atmospheric stability.

   • True
   • False

   Hint

   Think about how different classes change dispersion.

5. 5.

   Analyze a case where a new factory is to be constructed. Different stability classes are present during different times of the day. How would you determine the optimal time for emission testing?

   Hint

   Think about the time of day when the atmosphere varies the most.

6. 6.

   A new model predicts that under specific environmental conditions, sigma z increases significantly. Discuss the implications for local air quality.

   Hint

   Link increased vertical dispersion with air quality outcomes.