1. Climate

2. Climate Weather: day-to-day conditions at a particular time and place
Climate: average, year after year, conditions of temp. & precipitation in a particular region

3. Green House Effect
CO2, methane, water vapor, and other atmospheric gases trap heat energy and maintain Earth’s temperature range

4. Three Climate Zones due to latitude and angle of heating
Polar Zones - cold areas, very low angles of sunlight
Temperate Zone - affected by hot to cold
Tropical Zone - receives nearly direct sunlight year-round, warm climate

5. Climate Change
Unequal heating of the Earth’s surface drives wind and ocean currents, which transport heat throughout the biosphere

6. Climate Change
Future: Since your Grandparents, the human population has risen from 2.5 billion to more than 6.1 billion.
Researchers study human activity and its effect on the atmosphere by studying the ozone layer and global climate systems.

7. Ozone Layer O3, filters UV radiation in the atmosphere
UV - cancer, damage your eyes, decrease your resistance to disease
evidence ozone hole was in trouble
hole of the Arctic
Ban on CFC – chlorofluorocarbons
aerosol propellants, refrigerator coolants, plastic foams, and air conditioners
ozone holes should disappear in 50 years

8. Ozone Hole

9. Global Climate Change
Global Warming - increase in avg. temperature of the biosphere
Since 19th century, avg. atmospheric temperature has risen 0.6ºC
Since temp. has risen ºC
In part, global climate change is due to human activity
i.e. addition of CO2 to the atmosphere from burning fossil fuels and cutting and burning forests

11. Effects Global Temperatures will rise 1-2ºC by 2050
Sea Levels may rise - flood coastal areas
Droughts in North America during summer growing season

12. Effects
New organisms may be able to live in places they once could not where as others may be threatened or extinct in areas they once thrived
Storms to increase in strength and cause shifts in wind patterns that will affect local temp and rainfall