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WatA 4.4

Air Masses

TermDefinition
air mass A huge body of air that has similar temperature, humidity, and air pressure at any given height.
tropical A warm air mass that forms in the tropics and has low air pressure.
polar A cold air mass that forms north of 50° north latitude or south of 50° south latitude and has high air pressure.
maritime A humid air mass that forms over oceans.
continental A dry air mass that forms over land.
jet stream Bands of high-speed winds about 10 kilometers above Earth’s surface.
front The boundary where unlike air masses meet but do not mix.
occluded Cut off, as in a front where a warm air mass is caught between two cooler air masses.
cyclone A swirling center of low air pressure.
anticyclone A high-pressure center of dry air.
Created by: mgershen
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