ATMOSPHERIC STABILITY

ATMOSPHERIC STABILITY - ATMOSPHERIC STABILITY STABILITY...

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ATMOSPHERIC STABILITY *** STABILITY : refers to the tendency of an air parcel, with its water-vapor cargo, either remain in place or to change positions by raising or descending. Stable- it resists displacement upward Unstable- rises until it is at the same pressure Rules of Stability 1) When an air parcel is warmer than the surrounding air, the parcel will rise: UNSTABLE air or condition 2) When an air parcel is colder than the surrounding air, it will tend to stay at the same level or sink: STABLE air 3) the Environmental Lapse Rate (ELR) is the T° profile of the atmosphere (surrounding air). The ELR determines air stability. Types of Stability Dry adiabatic rate- the rate at which “dry” air cools by expansion or heats by compression absolute stability: the condition of the air when ELR < DAR No uplift of air Sinking of air Clear skies, mabey a few stratus clouds Temperature inversion- when the air temp is increasing with increasing altitude in the troposphere High pressure- when there is a lot of air bearing down on you
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This note was uploaded on 04/14/2008 for the course GEOG 1111 taught by Professor Hopkins during the Spring '08 term at UGA.

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ATMOSPHERIC STABILITY - ATMOSPHERIC STABILITY STABILITY...

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