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19 terms

Chapter 3

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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 cool air mass that forms north of 50 degrees north latitude or south of 50 degrees 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
front
The boundary where unlike air masses meet but do not mix
cyclone
A swirling center of low air pressure
anticyclone
A high-pressure center of dry air. The weather usually associated with this is dry and clear
stationary front
Cold and warm air masses meet, but neither can move the other
cold front
A fast-moving cold air mass overtakes a warm air mass
warm front
A warm air mass overtakes a slow-moving cold air mass
occluded front
A warm air mass is caught between two cooler air masses
How are air masses classified?
temperature and humidity
What are the four major types of air masses? are they dry or humid?
maritime polar and maritime tropical (humid) continental tropical and continental polar (dry)
What type of weather does a warm front bring?
rainy of cloudy
What type of weather does a cold front bring?
rain or snow, clouds
What type of weather does a stationary front bring?
clouds and precipitation
What type of weather does a occluded front bring?
temperature becomes cooler, weather may turn cloudy and rain or snow may fall
What is the difference between a cyclone and an anticyclone?
The direction of their winds