Meteorology for Air Pollution Control Engineers15

Meteorology for Air Pollution Control Engineers15 - 3 In...

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1 If it is forced to move downward, then, following the adiabatic path, its temperature will be lower than that of the surrounding parcels and negative buoyancy will cause it to move downward. This situation is like that of the ball sketched at the right of part (a ): it is unstable, vertical movements in the atmosphere occur spontaneously.
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2 In part (b), the actual lapse rate is the same as the adiabatic lapse rate. The buoyancy will move the air parcel neither up nor down. This is the neutral stability situation.
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Unformatted text preview: 3 In part (c), the actual lapse rate is less than the adiabatic lapse rate. If a parcel of air is moved upward, it will follow the adiabatic lapse rate and be colder than the surrounding air. Negative buoyancy will force it back toward its starting spot. 4 If the air parcel is moved downward, it will be warmer than the surrounding air, and buoyancy will force it back toward its starting spot. This is a stable situation, any vertical motions in the atmosphere are damped....
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This note was uploaded on 10/14/2011 for the course CIVL CIVL345 taught by Professor Hsinchu during the Spring '11 term at SUNY College of Environmental Science and Forestry.

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Meteorology for Air Pollution Control Engineers15 - 3 In...

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