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23.3 Winds

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by

Katelynn Dorn

on 12 February 2015

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Transcript of 23.3 Winds

Global Winds
winds blow from areas of high pressure (poles) to low pressure (equator)
Coriolis effect- winds in N. are deflected right, winds in S. are deflected left
convection cells- 3 looping patterns that occur above and below Equator
Polar Easterlies
subpolar lows- warm air moving northward is lifted by cold air moving toward the equator
polar easterlies are surface winds deflected by Coriolis effect
strongest off of Antarctica- polar front
Wind and Pressure Shifts
sun's rays change during the year
some areas are in different wind belts (FL- westerlies in winter, trades in summer)
Jet Streams
polar jet streams (high speed wind due to pressure changes between latitudes)
affect paths of storms and airplanes
subtropical jet streams
Local Winds
<100 = breeze
land changes temperature faster than water
sea breeze
land breeze
valley breeze- warm air from valleys moving up slope
mountain breeze- cooler air descends from mountain peaks
Trade Winds & Westerlies
Trade winds
between 0-30 degrees latitude
doldrums- where northeast and southeast trades meet, warm air moves upward
30 degrees- horse latitudes, descending air, also lack of wind
Westerlies
between 40-60, come from northwest and southwest
descending air deflected by Coriolis effect
23.3 Winds
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