1. Ch. 24.7: Climate

2. Climate =______________________
Depends on_________________________
Climate Regions:
Tropical: Hot & wet or Hot w/ wet & dry seasons
Dry: Desert
Temperate marine: humid w/ mild winters
Temperate continental: cold, snowy winters
Highlands: mt. regions, cool & wet
Polar: tundra & ice cap

3. Factors Affecting Temperature
Altitude:________________________
Latitude:
_________________________________
________________________________
Distance from bodies of water:
______________________________

4. Factors Affecting Precipitation
Latitude
__________________________________
Distribution of air pressure systems & global winds
Mt. Barriers

5. Mt. Barriers Warm air is pushed up by mt. Dry Air on opposite side
Condenses
Precip
Dry Air on opposite side
Desert - like

6. SHORT TERM Climate Change: El Nino ___________________________________
Ocean currents in Pacific______________
Result: Abnormal weather
When: Every ______ yrs

7. El Nino year

8. Climate Change: Ice Age Naturally Occuring & Long Term Change
When:
4 major ice ages in last 2 million years
Last one ended yrs ago
Why:

9. Icehouse vs. Greenhouse
LOW
18O:16O
HIGH 18O:16O
Icehouse vs. Greenhouse
ICE HOUSE = Ice poles
GREEN HOUSE= NO ice poles

10. Causes of Ice Ages 1.

11. 2. Changes in Solar Radiation (solar cycles)

12. Causes of Ice Ages continued
3. Volcanic Activity

13. 55 Ma: Uplift of the Himalayas
Ice Ages - Cause
55 Ma: Uplift of the Himalayas 4.

14. Ice Ages: Cause
5. Change in OCEAN Circulation

15. Ancient Ice Age: Snow Ball Earth
Ice covered Earth ~ 2.4 bya (end of Precambrian Time)
Global temps: ~ - 74 F
6. Biology Driven Ice Age = Snowball Earth

16. Global Warming
Debate: How much is natural? How much is due to burning fossil fuels?
Reducing CO2 levels could limit global warming