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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 Earth’s 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 world’s population relies on monsoons
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