Lecture 05

Lecture 05 - Lecture 5: Characteristics of Air Our...

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Lecture 5: Characteristics of Air Our understanding of climate and its change must start with an understanding of the primary components of the climate engine, air and water, and how they vary.
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Some Characteristics of Air Air is a gas in its molecular properties, but behaves (like liquid water) as a fluid on a macroscopic scale. Some important properties of air include: Temperature Pressure/Density Heat Capacity Humidity (amount of water vapor present)
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What Does Temperature Mean? Temperature is the average kinetic energy of an air molecule. When heat is added, temperature rises; when heat is lost, temperature decreases. We measure temperature in units of °C (centigrade or Celsius), °F (Fahrenheit), and K (Kelvin). 0°C = 273 K or 32°F. 0 K (absolute zero) = -273°C or -459°F 100°C = 373K or 212°F
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Pressure is the force exerted per unit area of surface. Atmospheric pressure is the force acting on a horizontal surface by the weight of the air column above it. Atmospheric pressure depends on the thickness of the atmosphere above the point of measurement and the density of air. Atmospheric pressure at sea level is normally
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This note was uploaded on 05/08/2009 for the course GEOL 150Lxg taught by Professor Stott during the Spring '07 term at USC.

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Lecture 05 - Lecture 5: Characteristics of Air Our...

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