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Giant Atmospheric Waves Over Iowa

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Uploaded by on Oct 19, 2007

Those giant waves—"undular bore waves"—were photographed Oct. 3rd flowing across the skies of Des Moines, Iowa.

These waves were created by a cluster of thunderstorms approaching Des Moines from the west. At the time, a layer of cold, stable air was sitting on top of Des Moines. The approaching storms disturbed this air, creating a ripple akin to what we see when we toss a stone into a pond.

Undular bores are a type of "gravity wave"—so called because gravity acts as the restoring force essential to wave motion.

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Uploader Comments (digidev)

  • lol there arent any waves at all

  • look closer... ATMOSPHERIC wave.

    What is your definition of the atmosphere?

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  • looks like roll clouds and a shelf

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