GAC model

• What is the global atmospheric circulation model about?

  How air moves around the Earth
• Why does the equator receive more sunlight than the poles?

  Sunlight hits the equator directly
• What are lines of latitude and longitude?

  Latitude goes sideways, longitude goes up
• What happens to air at the equator?

  Air rises, creating low pressure
• What are the names of the cells around the equator?

  Hadley cells
• What is the effect of rising air in the Hadley cells?

  It creates clouds and rain
• What is the name of the cells around 30 degrees latitude?

  Ferrel cells
• What happens to air in the Ferrel cells?

  Air sinks and warms up
• What are the names of the cells near the poles?

  Polar cells
• What weather conditions are associated with polar cells?

  High pressure and cold conditions
• What are the polar easterlies?

  Winds that move from the poles
• What are trade winds?

  Winds between the equator and 30 degrees
• What are the prevailing winds in the Ferrel cell?

  Westerlies from the northwest
• What is the significance of the global atmospheric circulation model?

  • Explains air movement around Earth
  • Influences weather patterns
  • Affects extreme weather events
  • Impacts volcanic ash distribution
• What are the four main cells in the global atmospheric circulation model?

  1. Hadley cells
  2. Ferrel cells
  3. Polar cells
  4. Each cell has distinct air movement patterns
• How does air pressure relate to air movement in the global atmospheric circulation model?

  • Rising air creates low pressure
  • Sinking air creates high pressure
  • Influences weather conditions globally