M eteorology 1020
Assignment 6b
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Tell me what type or types of clouds you observed this morning walking to class. What fraction of the sky was covered by what type of cloud? Was the local weather about what was forecasted? As a reference use Weather Outreach Cloud link or S'cool link .

Ice Ages

From On the Shoulders of Giants: Milutin Milakovitch answer the following questions.

  • 1. The Milankovitch Theory states that three elements of Earth-sun geometry affect the amount of solar radiation that reaches the earth. What are the three elements?
  • 2. How long is the eccentricity cycle?
  • 3. What shape is the earth's orbit when it has high eccentricity?
  • 4. What shape is the earth's orbit when it has low eccentricity?
  • 5. What happens to the seasons when the axial tilt increases?
  • 6. What happens to the seasons when the axial tilt decreases?
  • 7. How long is the obliquity cycle?
This graphic shows a visualization of the Milankovitch Theory. Changes in the solar radiation are indicated by color. The blue colors indicate solar radiation below present values. The red colors indicate solar radiation above present values.
  • 8. When was the Arctic region receiving the highest solar radiation?
  • 9. When was the Arctic region receiving the lowest solar radiation?
From What causes ice ages? answer the following question.
  • 10. What orbital conditions can cause an ice age to begin?
  • 11. What orbital condidions can cause the northern hemisphere to become unusually warm?

Due date: before lab Friday Oct 20, 2006
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