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Milankovitch Cycle

Milankovitch Cycle. Dr. E LCHS APES. Milutin Milankovitch. Serbian astrophysicist is best known for developing one of the most significant theories relating Earth motions and long-term climate change. http://tpema.free.fr/Images%20TPE/milankovitch_portrait.jpg. Eccentricity.

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Milankovitch Cycle

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  1. Milankovitch Cycle • Dr. E • LCHS APES

  2. Milutin Milankovitch • Serbian astrophysicist is best known for developing one of the most significant theories relating Earth motions and long-term climate change http://tpema.free.fr/Images%20TPE/milankovitch_portrait.jpg

  3. Eccentricity • The shape of the Earth's orbit around the Sun • Constantly fluctuating, orbital shape • More and less elliptical (0 to 5% ellipticity) • Cycle of about 100,000 years. http://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm

  4. http://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htmhttp://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm

  5. Axial Tilt • Oscillations in Earth's axial tilt • Periodicity of 41,000 years • 21.5 to 24.5 degrees • Today - tilt is about 23.5 degrees • Periodic variations of this angle vary the severity of the Earth's seasons changes http://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm

  6. http://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htmhttp://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm

  7. Procession • Earth's slow wobble as it spins on axis • Wobbles from pointing at Polaris (North Star) to pointing at the star Vega • Periodicity of 23,000 years • Changes the timing of the seasons

  8. http://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htmhttp://www.homepage.montana.edu/~geol445/hyperglac/time1/milankov.htm

  9. Wave Addition or Fourier Analysis

  10. Constructive http://www.tonmeister.ca/main/textbook/node188.html

  11. Constructive http://www.tonmeister.ca/main/textbook/node188.html

  12. Destructive http://www.tonmeister.ca/main/textbook/node188.html

  13. Destructive http://www.tonmeister.ca/main/textbook/node188.html

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