13 terms

Air Masses

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Air Masses
A huge body of air that has similar temperature, humidity, and air pressure throughout it is called an air mass.
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
air masses that form over land, dry.
jet stream
bands of high-speed winds about 10 kilometers above Earth's surface
front
A boundary between two air masses
occluded
a front where a warm air mass is caught between two colder air masses and brings cool temperatures and large amounts of rain and snow
cyclone
A swirling center of low air pressure
anticyclones
areas of high pressure that spiral counter-clockwise in the Northern Hemisphere, and are associated with fair weather
warm front
a front where warm air moves over cold air and brings drizzly rain and then are followed by warm and clear weather
cold front
forms when cold air moves under warm air which is less dense and pushes air up (produces thunderstorms heavy rain or snow
stationary front
A boundary between air masses that don't move possibly causing rain for several days
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