Class 3b: Winds (global and local)

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Class 3b Winds (global and local)
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Atmospheric pressure
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Atmospheric pressure

• Warm air rises, cold air sinks

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Measuring pressure
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Mapping pressure

• Isobars connect points of equal pressure

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What is wind?
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Local winds sea and land breezes
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Land and sea breezes
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Valley and mountain breezes
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Foehn/chinook winds
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Global circulation

• Hadley cells

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Coriolis effect

• Deflection from Earths rotation

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Global circulation
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ITCZ

• Convergence of rising air

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Tradewinds
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Subtropical highs
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Westerlies
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Polar highs and easterlies
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Seasonal shifts
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Monsoons
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Monsoons

• Half the worlds population relies on monsoons