GEOL 1 Lecture Notes - Lecture 18: Top, Climatology, Positive Feedback
2 Dec 2020
School
Department
Course
Professor
Document Summary
Climate average surface conditions on earth over longer spans of time, at least 10 years: complex to study because of many different components. Weather surface conditions on very short time spans. Feedbacks when you change something in a system it starts a chain reaction that comes around and changes the original thing. Positive feedback repeat the cycle every time it completes: hard to break out of loop, ex. Rise in temp ice melts rise in temp ice melts. Negative feedback when the cycle completes the opposite happens the next time: creates stabilizing seesaw effect, ex. Do poor on exam 1 study, do better on exam 2 slack off, do poor on exam 3. Insolation energy earth receives from the sun. Aphelion maximum distance from sun, 152 million km. Perihelion minimum distance from sun, 147 million km. Milankovich cycles cycles that explains earth"s movements, very long term. Eccentricity describes shape of earth"s orbit (100,000 years to cycle)
