GEOB 102 Lecture Notes - Lecture 2: International Date Line, Axial Tilt, Subsolar Point

• School: UBC
• Department: Geographical Biogeosciences
• Course: GEOB 102
• Professor: Simon Donner

Document Summary

Dr. simon donner | 11:00-12:30 m/w/f | office hours: m/w/f 10:00am - noon , t/th 11:00- noon | The sun, the seasons and the atmosphere (core concepts): The planetesimal hypothesis: solar system formed from a large, slowly rotating nebula . Planets separated from one big mass into what we now know. Perihelion: the point of the year the planet is closest to the sun (jan 3rd) Aphelion: when the earth is farthest from the sun (july 4th) Contains 99. 9% of all matter from original nebula. Solar mass is converted to energy by fusion (nuclear) of hydrogen atoms spitted out to all of the other planets. Has weather systems (sun spots) that cause a variable output of energy, but relatively constant. Emits charged particles, called the solar wind that"s what causes the aurora borealis (northern lights) Caused by particles emitted from the sun meeting and interacting with our atmosphere.