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lecture 2-12 grg sec2 - Atmospheric stability atmospheric...

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Atmospheric stability: atmospheric Stability refers to a state of equilibrium of the atmosphere Stable equilibrium Unstable equilibrium In order to determine atmospheric stability… o WE LOOT AT THE TEMP OF A PARCEL OF AIR AS IT RISES AND OR SINKS IN THE ATMOSHERE AND COMPARE THAT TEMP TO THE TEMP OF THE SURROUNDING ENVIRONEMNT AIR ( OUTSIDE OF THE PARCEL) o We must determine the rate of temperature change within a parcel of air as it rises or sinks o Remember the heat lost to the air during evaporation ( latent heat of evaporation/ vaporization) and the heat added to the air during condensation o When you force a parcel of air to rise, it expands and cools o When you force a parcel of air to sing. It compresses and warms o The at which air cools or warms depends upon the airs moisture content and whether the air is saturated (through condensation) or unsaturated Adiabatic Process: * WHEN a given parcel of air expands/ cools. Or compresses/warms.. with no inter change
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