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19 Cards in this Set
- Front
- Back
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Air mass
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An extensive body of air that has relatively uniform properties in the horizontal dimension and moves as an entity.
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Source region
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A part of Earth’s surface that is particularly suited to generate air masses.
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Front
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A zone of discontinuity between unlike air masses
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Warm front
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The leading edge of an advancing warm air mass.
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Cold front
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The leading edge of a cool air mass actively displacing warm air.
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Stationary front
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The common boundary between two air masses in a situation in which neither air mass displaces the other.
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Occluded front
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A complex front formed when a cold front overtakes a warm front.
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Midlatitude cyclones
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Large migratory low-pressure system that occurs within the middle latitudes and moves generally with the westerlies. Also known as extratropical cyclones and wave cyclones.
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Midlatitude anticyclone
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An extensive migratory high-pressure cell of the midlatitudes that moves generally with the westerlies.
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Tropical cyclone
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A storm most significantly affecting the tropics and subtropics, which is intense, revolving, rain-drenched, migratory, destructive, and erratic. Such a storm system consists of a prominent low-pressure center that is essentially circular in shape and has a steep pressure gradient outward from the center. When wind speed reaches 64 knots, they are called hurricanes in North America and the Caribbean.
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Typhoons
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The term used for tropical cyclones affecting the western North Pacific region.
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Baguio
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The term used for a tropical cyclone affecting the Philippines.
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Cyclone
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Low pressure center
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Eye
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The nonstormy center of a tropical cyclone
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Eye Wall
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Peripheral zone at the edge of a tropical cyclone eye where winds reach their highest speed.
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Continental Polar
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An air mass in the midlatitudes that comes in summer and winter. In the winter it brings very cold, dry, and clear weather. Generally seen in regions like Siberia.
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Maritime Polar
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An air mass in the midlatitudes that brings weather that is cool/cold, moist, and cloudy. Generally seen in regions like Alaska and Seattle.
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Maritime Tropical
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An air mass in the midlatitudes that brings warm weather that is very moist and often unstable. Generally proceeds from the Gulf of Mexico.
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Continental Tropical
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An air mass in the midlatitudes that brings hot, dry weather and clear skies. Generally seen in Northwest Mexico and the Southern United States.
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