Geography Chapter 3

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• Geography Chapter 3
• Section 2

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• I. Climate - weather conditions in a particular
  location over a period of time.

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• II. Factors influencing climate
• A. wind currents

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• B. ocean currents

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• C. Zones of Latitude
• 1. tropical low latitudes
• 2. temperate medium latitudes
• 3. polar high latitudes

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Zones of Latitudes
Polar
Tropics
Temperate
Polar
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• D. elevation
• E. topography

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• III. Changes in Climate
• A. El Nino - warming of the waters of the west
  coast of South America (from 2 to 7 years). More
  rain for the U.S.

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• B. La Nina - warming of the waters off the east
  coast of China. More rain for Asia and Australia.

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• C. Global Warming / Greenhouse Effect - warming
  of the earth's atmosphere caused by the burning
  of fossil fuels.

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• Global Warming indicators
• Heat waves and unusually warm weather.
• Ocean warming
• Sea Level rising
• Glacier melting
• Polar warming

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• D. Air Pressure
• 1. High Pressure - cold, dense, heavy air that
  tends to sink. Clear, calm weather.

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• 2. Low Pressure - When air is warmed, it expands,
  becomes lighter and rises. Weather is stormy.

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• 3. Wind - movement of air between areas of
  different pressure. Winds usually blow from high
  to low pressure areas.

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