Discussion Questions

• Discussion questions on proxies
• Discussion questions for Sept. 27
• Map of the World

Earth's Climate: Big Picture

• Earth's thermostat (long time scale)
• Greenhouse Effect
• Timescales and processes for climate change
• Earth's energy budget
• Handout on ocean circulation and climate

Ice Ages: WHY?

• Vostok ice core data during ice ages
  • Temp, carbon dioxide, and dust (one plot, 400,000 years back)
  • ChemConnections Vostok data (movie frames)
• Visuals for variations in earth's orbit (Milankovitch predicted periodicities)
• Milankovitch sun cycle predictions compared to data (patterns of change on scale of ~20,000-100,000 years)

The Greenland ice core data

• Greenland data back ~1 million years (look for patterns)

The Younger Dryas: The Classic abrupt climate event

• Ocean conveyor belt
• Handout on Dansgaard-Oeschger, Bond & Heinrich events (patterns of change on scale of 10,000 years or less)

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