Chapter 12 Notes

Chapter 12 Notes - Chapter 12 Notes Winds occur on all...

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Chapter 12 Notes Winds occur on all scales, but small scale winds are driven by pressure gradient force and are slowed by the effects of friction. Viscosity is the friction in a fluid, such as air. Higher viscosity means higher friction. o Molecular Viscosity- friction at the smallest scales when molecules bump into each other, occurs near boundaries o Eddy Viscosity- friction that arises through Eddies, which are human-sized swirls of air that interact with the larger-scale wind and help slow it down. Eddies arise when wind blows over obstacles such as trees or buildings, or through daytime heating from the sun, or from the atmosphere itself. Turbulence is the irregular, almost random, pattern of wind. Small Scale Winds going from East to West Across the US A Coastal Front is the boundary between two air masses along a coastline that acts as a smaller-scale version of a stationary front. Common in Northeast US. Cold Air Damming is the stubborn entrenchment of cold air that in pinned against high mountains. Classic case of shallow, cold air. Gravity Waves are atmospheric waves with an alternating small scale pattern of
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This note was uploaded on 01/30/2012 for the course AOSC 200 taught by Professor Hudson during the Fall '08 term at Maryland.

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Chapter 12 Notes - Chapter 12 Notes Winds occur on all...

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