Class Notes (837,623)
Canada (510,370)
Geography (806)
GEOG 205 (26)
Lecture

March 18th

2 Pages
50 Views
Unlock Document

Department
Geography
Course
GEOG 205
Professor
Gail Chmura
Semester
Winter

Description
March 18 , 2013: Slow Climate Change: the “Climatic Optimum” of Hypsithermal  this topic is gradual climate change, as opposed to drastic climate change like the Younger Dryas  this occurred 9000 years ago  climatic optimum… optimum for who?  changes associated with the Hypsithermal o intensified monsoons (period of heavy, summer rains that occur in tropical regions) o human settlement on the Tibetan Plateau, at 5200 metres, where no people live today o subtropical & tropical forests of SE China expanded northward o coral reefs developed north of their present growth limit o prairie expansion in NA o lakes in the Sahara desert  we will be focusing on prairie expansion & lakes in the Sahara  prairie expansion in NA o some of the best evidence for this comes from NA  Kirchner Marsh, Minnesota  any change in climate is likely to be expressed in a change in vegetation since Boreal Forest & Prairie are both at the edge here o the same thing happened in Alpine Swamp  oak replaced with Spruce o there was both a warming and a cooling at Kirchner  expansion of the prairies o this relates to those assumptions of the principle of uniformitarianism in a previous reading  modern analogues exist  origin (taphonomy) of a fossil assemblage can be established o what is missing today in cold biomes that wasn’t during the Pleistocene? megafaunal  if we had mammoths, we would have different biomes today o there was a readvance of the forest/retreat of the p
More Less

Related notes for GEOG 205

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit