Questions

1. What gas combines with water from a volcanic eruption to form sulfuric acid aerosols?
   
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2. At what altitude above the troposphere is the most backscatter from aerosols located?
   
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3. What layer of Earth's atmosphere above 10 kilometers has the most aerosol backscatter?
   
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4. From January 1991 to August 1991 what happened to the amount of backscatter above an altitude of 10 kilometers?
   
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   Why?
   
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5. What is the maximum (highest) amount of backscatter in the stratosphere for August 1991?
   
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   For January 1992?
   
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6. In what layer of the Earth's atmosphere, above the troposphere, is the largest amount of backscatter located for January 1992 and March 1992?
   
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7. Between August 1991 and January 1992, what change in altitude, above the troposphere, occurred for the maximum amount of backscatter?
   
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8. Why is the change in altitude significant for the maximum amount of backscatter between August 1991 and January 1992?
   
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9. Why does the maximum amount of backscatter occur in January 1992, when the eruption of Mt. Pinatubo occurred in June 1991, six months earlier? (Hint: Think of our location on the globe compared to Mt. Pinatubo.)
   
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