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CHP 19 Air...

Air Pressure and Wind

QuestionAnswer
air pressure the force exerted by the weight of a column of air above a given point.
barometer an instrument that measures atmospheric pressure
pressure gradient the amount of pressure change occurring over a given distance
Coriolis effect the apparent deflective force of Earth's rotation on all free-moving objects, including the atmosphere and oceans; deflection to the right in the n. hemisphere to left in s. hemisphere
jet stream hight -altitude winds west to east direction.
cyclone a low-pressure center characterized by a counterclockwise flow of air in the Northern Hemisphere - bad weather
anticyclone a high pressure center characterized by a clockwise flow of air in the Northern Hemisphere - fair weather
trade winds two belts of wind that blow almost constantly from easterly directions and are located on the north and south sides of the subtropical highs.
westerlies the dominant west-to-east motion of the atmosphere that characterized the regions on the poleward side of the subtropical highs.
polar easterlies in the global pattern of prevailing winds, winds that blow from the polar high toward the subpolar low; not persistent winds.
polar front the stormy frontal zone separating cold air masses of polar origin from warm air masses of tropical origin
monsoon seasonal reversal of wind direction associated with large continents, especially Asia; in winter, the wind blows from land to sea. In summer, the wind blows from sea to land.
prevailing wind a wind that consistently blows from one direction more than from another.
anemometer an instrument used to determine wind speed.
El Nino the name given to the periodic warming of the ocean that occurs in the central and eastern Pacific; a major El Nino episode can cause extreme weather in many parts of the world.
Created by: melaniebird
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