Transcript Climate Change and Humans pg.433

12.1
Are Climates Changing?
 What evidence suggests our climate may be
changing more rapidly than some species can adapt?
How much of global warming is owing
to natural greenhouse effects and
enhanced greenhouse effects?
What are the main greenhouse gases
that contribute to warming
temperatures?
 Carbon dioxide
 nitrous oxide
 halocarbons
Where does the CO2 come
from?
What removes carbon dioxide from
the atmosphere (carbon sinks)?
What are the main sources of the
carbon dioxide in the atmosphere?
Can human activities cause climate
change? (12.2)
 Albedo effects

  reflection  temperatures
 reflection (absorption)  temperatures
Predicting Climate Change 12.3
 GCMs (General Circulation Models): 3-D
mathematical models made with supercomputers:
What do they tell us?
What will happen to Canadian
biomes if CO2 emissions
double?
The Challenge:
How can we reduce our impact
on the biosphere and global
climate and still meet human
needs?
IPCC
International
Panel on Climate
Change
Kyoto
Protocol
Precautionary
Principle
Gaia
Hypothesis
Assignment:
Complete your notes
 http://www.leonardodicaprio.org/