GGH1503 SUMMARY NOTES CHAPTER 19

Climate Control and
Ozone Depletion

Chapter 19

,Core Case Study: Studying a Volcano to
Understand Climate Change

 June 1991: Mount Pinatubo (Philippines)
exploded

 Airborne pollutants, deaths, and damage

 Affected climate temperature

 Climate predictions based on the forecasts of
James Hansen of NASA

,19-1 How Might the Earth’s Temperature
and Climate Change in the Future?
 Concept 19-1 The overwhelming scientific
consensus is that the earth’s atmosphere is
warming rapidly, mostly because of human
activities, and that this will lead to significant
climate change during this century.

, Global Warming and Global Cooling
Are Not New (1)

 Over the past 4.7 billion years the climate has
been altered by
• Volcanic emissions
• Changes in solar input
• Movement of the continents
• Impacts by meteors


 Over the past 900,000 years
• Glacial and interglacial periods