1. Natural Climate Changes

2. Instructions Label page Natural Climate Change
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3. Climate changes Earth is constantly changing, including the climate.
Natural processes
Human impacts

4. Long Term Climate Change 77
Ice Ages-Periods of extensive glacial cover
The last ice age ended about 10,000 years ago (Pleistocene)
Ice ages have occurred due to changes in Earth’s tilt/axis

5. Volcanic eruptions 77 Volcanoes release large amounts of gas and ashes
Majority of the gases emitted include: water vapor, CO2, sulfur dioxide (SO2)
Clouds can block out the sun’s radiation and cause a cooling of Earth (Year With No Summer)

7. Volcanic eruption affect on climate

8. El Niño 79
El Niño – Is a period where the Eastern Pacific Ocean gets warmer while the Western Pacific gets cooler
Trade winds delivering warm water to the west die down
The Eastern Pacific Ocean will have a pressure decrease  More rainfall
The Western Pacific Ocean will have a pressure increase  Less rainfall

11. La Niña 79
La Niña – Period where temperatures in the Eastern Pacific Ocean cool down
Caused when Trade Winds strengthen blowing warm water to the west causing cold water to pile up in the East
The Eastern Pacific Ocean will have a pressure increase  Less rainfall
The Western Pacific Ocean will have a pressure decrease  More rainfall

12. Solar Activity 81
When the sun is most active – contains sunspots (dark spots) on the sun (more solar radiation)
Increase in number of sun spots – temperatures in North America and Europe increase

13. Short Term Changes In Climate 81
Seasons are short term periods of climate change
Exist because Earth is tilted on its axis
Some areas of the world get more direct heat

14. Causes of Climate Change 81
Changes in Earth’s Orbit
Every 100,000 years Earth’s orbit becomes more elliptical
Changes in Earth’s Axis-Every 41,000 years Earth’s tilt changes from 22.1 degrees to 24.5 degrees

15. L Cooler weather and drought Trade winds strengthen
Wetter than usual weather
Cooler weather and drought L
Cooler weather and drought
Warmer weather and wet conditions
Trade winds strengthen