7 terms

Winds

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Wind
horizontally moving air; caused by uneven heating of the Earth's surface, which creates warm and cool air masses, resulting in differences in air pressure from place to place; moves from high pressure area to low pressure area, like when deflating a balloon
Prevailing Westerlies
winds that occur between 30 degree and 60 degrees in both hemispheres; blow from west to east; blows towards the poles, global winds
Trade Winds
wind that occurs between 30 degree north and 30 degree south; blow from east to west.; blow continuously towards the equator; global winds
Prevailing Winds
a wind that usually blows from one direction (west to east - for example); local winds - move across small distances close to Earth's surface; unpredictable; changing frequently with air pressure in-fluctuation (example: sea breeze, land breeze, Chinook, Santa Ana)
Prevailing Easterlies
winds that occur between 60 degree and 90 degree in both hemispheres; blows from east to west; blow away from the poles; global winds
Jet Stream
a strong wind found 6-9 miles up in the troposphere. A jet stream can reach speeds of 50 - 200 mph. Jet streams steer movement of surface air masses and weather systems. Above North America, the jet stream moves weather from west to east. It can change locations depending on global conditions.
Global Winds
moves great distances over the globe; predictable and stable; also called atmospheric circulation (example: Polar Easterlies, Prevailing Westerlies, and Trade Winds)