GEOL 105 Lecture Notes - Lecture 8: Milankovitch Cycles, Northern Hemisphere, Reducing Atmosphere

• School: College of Charleston
• Department: Geology and Environmental Geosciences
• Course: GEOL 105
• Professor: Buetel

Document Summary

H and he when molten---which slowly escape. Where hydrogen and other substances provide electrons. Hint: the present is the key to the past where do we get abiotic gasses from. As the giant magma ball cooled it also degassed releasing co2, n, methane, ammonia, hydrogen, and water vapor creating the atmosphere. O2 came later after life (no oxygen yet) In summer the northern hemisphere is tilted towards the sun. In the winter the northern hemisphere is tilted away from the sun. Motion of the itcz causes rainy seasons. The itcz moves because where the sun in concentrated moves as the earth goes around the sun because of the tilt. Changes in earth"s orbit and tilt (i. e. relationship to the sun) that affect climate. Tilt impacts how far north or south the itcz moves. Whether the northern or southern hemisphere is pointing to the sun when the earth is closest to the sun.