GEOL-1010 Lecture Notes - Lecture 9: Milankovitch Cycles, Climatology, Supervolcano
5 Feb 2018
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Geology in the news: toba supervolcanic eruption being studied using oxygen isotopes in quartz crystals, ca 73,000 yrs. ago, largest eruption that humans have ever witnessed. When b decreases a increases: next time through, 3. When b increases, a increases (back to step one: you do poorly on exam one so you start to study more. Variations in isolation: aphelion- point where the earth is the maximum distance away from the sun. This is the farthest away from the sun earth will be during the sun: 152 million km, perihelion- minimum, the closest to the sun you can get, 147 million km, milankovitch cycles, 1. Isolation changes with latitude: why are the poles colder than the tropics, sunlight isn"t hitting head on like at the equator, the poles are more curved. It falls over a larger area while the equator is concentrated on a small area. Latitudinal insolation distribution: must redistribute the energy, blue = incoming.
