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Urban Air Pollution

Urban Air Pollution. Get out Homework! . Out on your desk have the following: Wind Review Worksheet Stamp sheet Pencil/pen Red and blue PUT EVERYTHING ELSE AWAY! . Santiago, Chile. Mexico City, Mexico. Salt Lake City, Utah. Denver. Los Angeles. What is an Inversion?. Second Layer:

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Urban Air Pollution

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  1. Urban Air Pollution

  2. Get out Homework! • Out on your desk have the following: • Wind Review Worksheet • Stamp sheet • Pencil/pen • Red and blue PUT EVERYTHING ELSE AWAY!

  3. Santiago, Chile

  4. Mexico City, Mexico

  5. Salt Lake City, Utah

  6. Denver

  7. Los Angeles

  8. What is an Inversion? • Second Layer: • Clear, breathable, clean air • Surface Layer: • Dirty, brown, polluted air Boundary

  9. Sources of Pollution • Cars • Factories • Ships • Airplanes • Tractors • Fires • Cooking

  10. Density • Density • Amount of mass in a given volume 5 circles per cube Density =

  11. Density • Density • Amount of mass in a given volume 11 circles per cube Density =

  12. Temperature Affects Density 2 circles per cube 6 circles per cube Density =

  13. Temperature Affects Density 3 circles per cube 10 circles per cube Density =

  14. Which rises and which sinks? Density = Density = 2 circles per balloon 5 circles per balloon

  15. Which rises and which sinks? Density = Density = 7 circles per cube 3 circles per cube

  16. Normal Atmosphere COLD • Normal atmosphere COOL WARM • Air can rise and mix freely throughout the entire troposphere

  17. Inversion Atmosphere COOL • Inversion WARM COLD • Air is trapped in the bottom layer of cold air

  18. Inversion Atmosphere COOL • Mountains WARM COLD • Prevent air from leaving the city

  19. Define • Normal Atmosphere : • Inversion Atmosphere : Air can mix freely through the entire troposphere Air is trapped in the bottom layer of cold air

  20. Inversion Atmosphere Normal Atmosphere

  21. Types of Inversions • Radiation inversions • At night or during winter, the surface cools faster than the air above it WARM HOT COLD HOT

  22. Types of Inversions • Sea breeze inversions • Sea breeze injects cold air below warm air HOT HOT COLD

  23. How to break an Inversion • Sunlight • Warms the surface faster than the air above, eliminating the inversion. WARM COOL COLD HOT

  24. How to break an Inversion • Rain • Makes the atmosphere the same temperature and cleans pollution. COOL WARM COOL

  25. How to break an inversion • Winds • Mix the atmosphere, eliminating inversion. HOT WARM WARM COLD

  26. Discuss • What is an inversion? • How does it form? • How do inversions break?

  27. Mumbai, India

  28. Madrid, Spain

  29. Air Pollution Negative Impacts • Decrease Visibility • Make Bodies of water more Acidic • Affect our health • Irritate lungs • Aggravate asthma • Lead to nonfatal heart attacks in elderly • Premature death in people with heart or lung disease

  30. Describe how an inversion forms • During the winter surface cools faster than air above it • Sea breeze injects cold air in the surface

  31. Types of Inversions • Subsidence inversions • Sinking air from high pressure compresses and warms air high above surface WARM COOL

  32. Convection Demonstration

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