ESS102H1 Lecture 9: Lecture 9

153 views3 pages
30 Oct 2010
School
Department
Course

Document Summary

Potential causes of climatic change over the geologic past. Oxygen as a waste product of cyanobacteria. Aphelion j when earth furthest from sun: northern hemisphere summer, result in not all the ice melting during summer. Axial tilt j how much the earth is tilted. If a hemisphere is pointed towards the sun at perihelion, that hemisphere will be pointing aay at aphelion, and the difference in seasons will be more extreme. Ice sheets can build up if a supercontinent is at a pole. Pangea was at the south pole so even africa was once glaciated. Ice ages, when north america and moth europe host large ice sheets, alternate with brief warm interglacials. Ice sheets cut modern landscapes of canada from the mountains of the west to deep coastal inlets of the great lakes. Dumping enormous volumes of ice and fresh water into the north atlantic.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related Documents