ATOC notes April 1

ATOC notes April 1 - Eccentricity Orbit is elliptic...

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ATOC notes April 1, 2009 GLACIAL Stable conditions due to negative feedback Unstable conditions due to positive feedback Ice sheet: Snow, summer, high albedo promotes more snow Milankovitc cycles Elliptic/circular (125000 years) Obliquity (tilt) (41,000 years) –change in winter summer diff Precession (wobble) (21,000 years) change in time of year
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Unformatted text preview: Eccentricity Orbit is elliptic Sometimes more circular Perihelion when closest to the sun Aphelion when most distant Variation about every 100000 years Tilt of earth determines difference between summer and winter Tilt varies between 22 and 24.5 degrees 22: mild summer, mild winter 24.5: hot summer, cold winter...
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