STEM与日常科技·英语30篇（3）
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Coriolis Force and Hurricane Rotation Direction
科里奥利力与飓风旋转方向
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Earth's rotation causes moving air and water to deflect right in the Northern Hemisphere.
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This apparent deflection is called the Coriolis force, though it's not a real force but an effect of inertia.
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In the Southern Hemisphere, winds deflect left, making cyclones spin clockwise instead of counterclockwise.
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Hurricanes form only where warm ocean water fuels rising moist air near the equator.
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But they cannot develop exactly on the equator because the Coriolis effect vanishes there.
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As storm systems grow, the Coriolis force organizes wind into tight rotating spirals.
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Meteorologists use this principle to forecast storm paths and intensities accurately.
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Small-scale weather events like tornadoes are too brief for Coriolis influence to dominate.
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Ocean currents also follow this rule, forming large rotating gyres in each hemisphere.
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Understanding this helps explain why typhoons in Asia spin the same way as Atlantic hurricanes.