15 terms

Weather and Climate 3

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Air Mass
a huge body of air that has similar temperature, humidity, and air pressure at any given height
Air Pressure
the pressure caused by the weight of a column of air pushing down on an area
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
Continental
a dry air mass that forms over land
Maritime
a humid air mass that forms over oceans
Front
the boundary where unlike air masses meet but do not mix
Cold Front
a fast moving cold air mass that overtakes a warm air mass where the warm air is pushed up
Warm Front
a warm air mass that overtakes a slow moving cold air mass where the warm air moves over the cold air
Stationary Front
where a warm air mass and a cold air mass meet but neither air mass is able to move the other
Occluded Front
a front where the warm air is cut off between two cooler air masses
Cyclone
a swirling center of low air pressure
Anticyclone
a high pressure center of dry air
Prevailing Westerlies
the major wind belts over the continental United States which generally push air masses from west to east
Jet Stream
bands of high speed winds about 10 km above Earth's surface