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Unformatted text preview: Astronomical Influences on Earths Climate Eccentricity of Earths orbit around the sun (varies over period of ~100,000 years) Precession (Period of ~26,000 years) Inclination of Earths axis versus orbital plane Milankovitch Hypothesis: Changes in all three of these aspects are responsible for long-term global climate changes (ice ages). This affects which of these? Energy received & Where the energy is Milankovitch: good (not perfect) predictor of Earth temperature Last glaciations- polar regions receiving less than average energy from the sun. End of last glaciations- polar regions receiving more than average energy from the sun The Greenhouse Effect- How energy escapes Earth....
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