POLI 100 Lecture Notes - Lecture 3: Eugenius Warming, Thermosphere, Stratopause
Document Summary
The midnight sun never sets inside the arctic circle during summer and never rises in the winter. Not very high in the sky, never above the horizon. Mixture of gases, invisible most of the time except when smoky cause of particles suspended. Gases captured in the early nebula that congealed and contracted to produce different planets and solar system. Over time after solids of earth clumped, h and he developed into the atmosphere. We have an atmosphere that now is hospitable to organisms, o appeared and created by solar activity and by organisms in the ocean. Distinctive structure, classify different layers because of temperature, composition and function. Amount of gas molecules in a given volume. Why? with altitude, gravity has pulled all gas to the surface, weight of all molecules pressing on each other is creating a more dense atmosphere. Almost all of atmospheric mass witting the stratopause. 1013. 2 mbar average pressure at sea level (millibars)
