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- MILANKOVITSH THEORY
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- The Yugoslav mathematician Milutin Milankovitch studied the orbital parameters that cause seasonal variations on
- Earth. He calculated insolation curves for different latitudes.
- The degree of eccentricity changes the relative Sun-Earth distance on a 100,000 year cycle. (The Earth is in an orbit
- around the Sun that is not quite circular because of the interactions with orbits and gravitational pull of other planets.)
- The Earth's axis tilts (obliquity) between 21.5 and 24.5 degrees with respect to the orbital plane. It has a cycle of 41,000
- years. Like a spinning top, the Earth precesses around a circular path in a 19,000 to 21,000 year cycle. Combining these
- effects, one can calculate when ice ages and warm intervals will tend to occur. The data show that at times of ice ages,
- 60N would receive as little insolation as 80N today.
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