Chapter 6 stability.docx

Chapter 6 stability.docx - Chapter 6 1...

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Chapter 6 1) stability/instability (stable versus unstable equilibrium) a air parcels (self-contained blobs of air). Examples of rising air parcels are thermals which hang gliding utilizes. 2) The atmosphere at a given location is stable if an embedded parcel which is suddenly forced upward and then released falls back to its original height. the atmosphere is unstable if such an air parcel, upon receiving an upward impulse, will continue to rise and, hence, move farther and farther away from its original position (height) An unstable atmosphere allows for rapidly rising motion. A rising stream of moist air parcels could potentially produce a thunderstorm. One of the primary purposes of this chapter is to determine the atmospheric conditions under which thunderstorms can form. 1. Stability/instability applies to sinking air parcels as well. If the atmosphere is unstable, any embedded sinking air parcel will continue to move downward away from its original height.
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  • Spring '15
  • 1 km, representative, adiabatic lapse rate

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