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Kármán Vortex Streets and Wave Clouds Over Eastern USA – January 13th, 2010

30.5N 82.9W

January 13th, 2010 Category: Clouds, Image of the day

USA - January 5th, 2010

USA - January 5th, 2010

The parallel lines in the clouds that seem to radiate outward from the southern and southeastern coasts of the United States of America are a phenomenon known as Kármán vortex streets. These repeating patterns of swirling vortices are caused by the unsteady separation of flow of a fluid over bluff bodies.

Once the full image has been opened, another phenomenon is visible: wave clouds. These are created when clouds form along the crests of atmospheric standing waves but evaporate in the descending parts of the waves, making repeating cloud-covered and cloud-free bands.

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