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Section 3 Global Winds and Local Winds

Section 3 Global Winds and Local Winds. Chapter I1. Bellringer. Summarize the processes of radiation, thermal conduction, and convection. Give an example of each. Record your response in your science journal. Section 3 Global Winds and Local Winds. Chapter I1. Objectives.

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Section 3 Global Winds and Local Winds

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  1. Section3 Global Winds and Local Winds Chapter I1 Bellringer • Summarize the processes of radiation, thermal conduction, and convection. Give an example of each. • Record your response in your science journal.

  2. Section3 Global Winds and Local Winds Chapter I1 Objectives • Explainthe relationship between air pressure and wind direction. • Describe global wind patterns. • Explain the causes of local wind patterns.

  3. Agenda • Today we will: • Day 1 • Learn about winds. • Do now. • Powerpoint

  4. Vocabulary wind  Coriolis effect  polar easterlies  westerlies  trade winds  jet stream

  5. Section3 Global Winds and Local Winds Chapter I1 Why Air Moves • Air Rises at the Equator and Sinks at the PolesAs the cold air sinks, it creates areas of high pressure around the poles. This cold polar air then flows toward the equator. • Pressure Belts Are Found Every 30º Convection cells are separated by pressure belts, bands of high and low pressure.

  6. Section3 Global Winds and Local Winds Chapter I1

  7. Section3 Global Winds and Local Winds Chapter I1 Why Air Moves, continued • The Coriolis Effect The apparent curving of the path of currents due to the Earth’s rotation is called the Coriolis effect.

  8. Section3 Global Winds and Local Winds Chapter I1

  9. Section3 Global Winds and Local Winds Chapter I1 Global Winds • Polar Easterliesare the wind belts that extend from the poles to 60° latitude in both hemispheres. • Westerliesare the wind belts found between 30° and 60° latitude in both hemispheres. • TradeWindsare the winds that blow from 30° latitude almost to the equator in both hemispheres.

  10. Section3 Global Winds and Local Winds Chapter I1 Global Winds, continued • The Doldrums The trade winds of the Northern and Southern Hemispheres meet in an area around the equator called the doldrums. • The Horse Latitudes At about 30° north and 30° south latitude, sinking air creates an area of high pressure called the horse latitudes. • Jet Streams are narrow belts of high-speed winds that blow in the upper troposphere and lower stratosphere.

  11. Section3 Global Winds and Local Winds Chapter I1

  12. Section3 Global Winds and Local Winds Chapter I1 Local Winds • Local winds generally move short distances and can blow from any direction. • Mountain and valley breezes are examples of local winds caused by an area’s geography. • Sea and land breezes are affected by temperature.

  13. Section3 Global Winds and Local Winds Chapter I1

  14. Exit Ticket

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