Chapter%205%20atmospheric%20moisture-1

4c1000m also have the dry adiabatic lapse rate dalr

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Unformatted text preview: is occurring (before condensing) Wet adiabatic lapse rate (WALR) 5C/1000m (2.7F/1000ft) Rate at which rising air is cooled by expansion when condensation is occurring (after condensing) The Adiabatic Process Atmospheric pressure decreases with altitude so... As a parcel of air rises pressure on the parcel decreases air expands and cools As a parcel of air descends pressure on the parcel increases air is compressed and warms Visualizing Physical Geography Precipitation belt Meters 4000 3000 2000 Condensation level No precipitation rain shadow Air cools at the WALR Air warms at the DALR 1000 0 Air cools at the DALR Adiabatic Processes (on board) Adiabatic Heating and Cooling An air parcel will buoyant and rise as long as it is warmer than the surrounding air. When it reaches a layer of the atmosphere that is the same temperature as itself, it will stop rising. Instability and Stability of air in the atmosphere Stable Air parcel is colder than its surrounding High pressure systems Unstable: Air parcel is warmer than the surrounding environment...
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This note was uploaded on 06/26/2011 for the course GEOGRAPHY 600-201010 taught by Professor Christopherpost during the Spring '10 term at Kent State.

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