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impact winter

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impact winter

hypothesized extended period of worldwide cold weather due to the impact of a celestial body on the Earth's surface

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About impact winter

An impact winter is a hypothesized period of prolonged cold climate due to an impact event upon the Earth's planetary surface by a large asteroid or comet. If such meteors were to survive atmospheric entry and successfully impact land or a shallow body of water, it would eject an enormous amount of debris, dust, ash and other particulate materials into Earth's atmosphere, blocking off irradiance from the Sun. This would lead to global dimming and cause the climatic temperature to decrease drastically. If an asteroid or comet with the diameter of about 5 km (3.1 mi) or more were to hit in a deep body of water or explode mid-air before hitting the surface, there would still be an enormous amount of debris released into the atmosphere.

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