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Global Wind Patterns

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Global and local winds
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Global Wind Patterns

  1. 1. Where does this occur? Wind current on a… 1. Local scale. 2. Global scale WINDS ARE NAMED FROM WHERE THEY COME FROM! SEA BREEZE Mountain BREEZE Prevailing Westerlies NE Trade Winds Polar EasterliesLand BREEZE Valley BREEZE LOCALIZED WINDS GLOBAL WINDS
  2. 2. Global Winds • Wind currents that develop on a GLOBAL SCALE over long distances. • Still a result of temperature and pressure differences. • Air moves between the warm equator and the cold poles. Global Winds
  3. 3. Global Temperature Patterns So Air tries to move between the poles from a high to low pressure = Global Winds Strong Direct Sunlight! Warm Rising air = LOW pressure Weaker Indirect Sunlight! COLD Sinking air = HIGH Pressure
  4. 4. The Coriolis Effect • Air does not move in a straight line because of Earth’s rotation. Coriolis Effect Earth spin makes the wind curve instead of traveling in a straight line.
  5. 5. Curve to the RIGHT in the NORTHERN HEMISPHERE. Curve to the LEFT in the SOUTHERN HEMISPHERE.
  6. 6. Global Winds LOW PRESSURE HIGH PRESSURE LOW PRESSURE HIGH PRESSURE LOW PRESSURE HIGH PRESSURE LOW PRESSURE HIGH PRESSURE Northern Hemisphere Southern Hemisphere
  7. 7. POLAR EASTERLIES Prevailing Westerlies Easterly Trade Winds Hadley Cells.
  8. 8. Global Winds 60° S 30° S 0° 30° N 60° N Prevailing Westerlies - From 30°N to 60°N - Deflected to right Easterly Trade Winds - From 30°N to O° - Deflected to right Polar Easterlies - From 90°N to 60°N - Deflected to right Easterly Trade Winds - From 30°S to 0° - Deflected to left Prevailing Westerlies - From 30°S to 60°S - Deflected to left Polar Easterlies - From 90°S to 60°S - Deflected to left Doldrums Remember, winds are named from where they come.

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