chapter_02 - Click to edit Master subtitle style Chapter 2...

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Unformatted text preview: Click to edit Master subtitle style Chapter 2 Energy: Warming the Earth and the I. Energy, Temperature, and Heat n Energy from the sun drives weather n Energy is the ability or capacity to do work on some form of matter n Potential Energy n Kinetic Energy n Internal Energy n First law of thermodynamics What is Temperature? n Temperature: a measure of the average speed of the atoms and molecules of an object Click here to activate this figure http://www.atmos.uiuc.edu/courses/atmos100/all_programs.html What is Heat? n Heat: the transfer of energy due to temperature differences n Specific Heat: heat capacity of a substance per unit mass Latent Heat The Hidden Warmth n Latent Heat: heat energy required to change a substance from one state to another n Water can exist as a vapor, water, or ice n Sensible heat is felt, whereas latent heat is not, rather stored or hidden Latent Heat The Hidden Warmth n Evaporative Cooling n Consider a water droplet with some molecules evaporating n Condensational Heating n Consider a water droplet forming Latent Heat has a role in the n Provides energy for storms n Distributes heat from the tropics to the poles The latent heat released in this cloud formation is equivalent to a small atomic bomb! II. Heat Transfer in the Atmosphere n Heat is transferred from warmer to colder objects n How does temperature difference relate to heat transfer? n 3 Mechanisms n Conduction n Convection Heat Transfer - Conduction n Conduction: transfer of heat by molecular contact n What does it mean to be a good conductor?...
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chapter_02 - Click to edit Master subtitle style Chapter 2...

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