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Air Pressure and Winds Chapter 6. Mercury Barometer.

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Presentation on theme: "Air Pressure and Winds Chapter 6. Mercury Barometer."— Presentation transcript:

1 Air Pressure and Winds Chapter 6

2

3

4 Mercury Barometer

5 Aneroid Barometer

6 Aneroid Barometer and Barograph

7 Atmosphere Thickness and Pressure at Altitude 50% below 6km altitude 90% below about 18km 0.00003% above 100km Sealevel Pressure = 14.7 lb/in 2 or 1013 mb Orem Pressure = 12.5 lb/in 2 or 860 mb Figure 1-20, p. 22 Orem

8 Pressure Changes with Altitude

9 Pressure Variations with Temperature

10 Adjusting to Sea-Level Pressure

11 Planes Fly at Constant Air Pressure Level

12 Isobars

13 Factors Affecting Wind

14 Sea Breeze Caused by Pressure Gradient

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17 Coriolis Effect

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21 Geostrophic Wind

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25 Effect of Friction

26 Gradient Wind

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28 Surface High and Low Pressure Systems

29 Wind Measurement Wind Vane Prevailing Wind Cup Anemometer Aerovane

30 Wind Rose

31 Chapter 6 END


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