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Why Do Hurricanes Spin Counterclockwise in the Northern Hemisphere?
为什么北半球的飓风呈逆时针旋转？
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Hurricanes spin due to the Coriolis effect — a deflection caused by Earth’s rotation beneath moving air.
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In the Northern Hemisphere, winds flowing toward a low-pressure center curve right, creating counterclockwise rotation.
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The opposite happens south of the equator, where storms spin clockwise due to leftward deflection.
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Near the equator, the Coriolis force is too weak to organize storms, so hurricanes rarely form within 5° latitude.
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Warm ocean water fuels the storm by evaporating and rising, releasing latent heat as it condenses.
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This heat powers convection, lowering central pressure and pulling in more moist air at the surface.
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Wind shear — changes in wind speed or direction with height — can tear storms apart or weaken them.
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Satellites track cloud motion and sea-surface temperatures to predict hurricane paths and intensities.
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Understanding rotation helps forecast landfall zones and prepares coastal communities for extreme weather.
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It also reminds us how planetary motion shapes local weather, linking Earth’s spin to human safety.