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Global Patterns Chapter 5 Lesson 3
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Essential Question
What factors affect the weather?
▪ How do global patterns affect weather?
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Factors That Affect Climate Latitude
• As latitude increases, the intensity of solar energy decreases.
• The tropical zone is between 23.5o north and 23.5o south of the equator. The sun’s rays are most intense and the temperatures are always warm.
• The temperate zones are between 23.5o and 66.5o north and between 23.5o and 66.5o south of the equator. The sun’s rays strike Earth at a smaller angle than near the equator.
• The Polar zones are between 66.5o north and south latitudes and the poles. The sun’s rays strike Earth at a very small angle in the polar zones.
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Earth’s Major Climate Zones
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Latitude and TemperatureWhat are the three temperature zones on the map?
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Tropical zone
Temperate zone
Temperate zone
Polar zone
Polar zone
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Factors That Affect Climate
Elevation/Altitude• The higher the elevation is, the colder the climate.
Topography• Topographic features such as mountains play an
important role in the amount of precipitation that falls over an area.
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Factors That Affect Climate
Water Bodies• Large bodies of water such as lakes and oceans have an
important effect on the temperature of an area because the temperature of the water body influences the temperature of the air above it.
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Warm ocean water warms the air above it. A cold current brings cool air.
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The Rain Shadow Effect
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Global Patterns
What happens to the humid air when it encounters the mountains?
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Factors That Affect Climate
Atmospheric Circulation (Wind)• Global winds distribute heat and moisture around Earth.
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Factors That Affect Climate
Vegetation• Vegetation can affect both temperature and the
precipitation patterns in an area.
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Natural Processes That Change Climates
Volcanic Eruptions• The presence of volcanic ash, dust, and sulfur-based aerosols in
the air increases the amount of solar radiation that is reflected back into space. This causes Earth’s lower atmosphere to cool.
Ocean Circulation• Changes in ocean circulation also can result in short-term climate
fluctuations.
El Nino!!!
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Natural Processes That Change Climates
Solar Activity• When the sun is most active, it contains dark blemishes called
sunspots. The formation of sunspots appears to correspond with warm periods in Europe and North America.
Earth Motions• Changes in the shape of Earth’s orbit and the tilt of Earth on its
axis are other Earth motions that affect global climates.
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Human Impact on Climate Changes
Global Warming• As a result of increased levels of carbon dioxide and other greenhouse
gases, global temperatures have increased.
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Home Learning
Complete Lesson 3 Assess Your Understanding
Review & Assessment #6-9 Page 185
Extra Credit Water cycle in a Bag 10/8
Chapter 5 Vocabulary 10/18Gizmo #1 Water Cycle 10/18Fairchild Activity #2 Writing: 10/23
