File:Cloud Vortices and Dust off Canary Islands (MODIS 2020-10-29).jpg
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Summary
[edit]DescriptionCloud Vortices and Dust off Canary Islands (MODIS 2020-10-29).jpg |
English: Swirling patterns in the cloud cover behind the Canary Islands greeted NASA’s Aqua satellite as it passed overhead in late October 2020. The Moderate Resolution Imaging Spectroradiometer (MODIS) on board that satellite acquired a true-color image of the scene on October 26.
The swirls are caused by wind rushing past the tall volcanic peaks on the Canary Islands. These spiral eddies are known as von Kármán vortices and are a pattern that can form nearly anywhere fluid flow is disturbed by an object. In this case, as winds from the northeast strike the towering mountains, the winds are diverted around these peaks, and the disturbance in the flow of wind propagates downstream in the form of vortices that alternate their direction of rotation. When clouds are present, the movement of the air will be shown in the clouds. On this particular day, the wind was strong enough to create some eddies, but only for a short distance. Dust from the Sahara Desert is entrained in the clouds that lie nearest the coast of Africa. |
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Date | Taken on 26 October 2020 | ||
Source |
Cloud Vortices and Dust off Canary Islands (direct link)
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Author | MODIS Land Rapid Response Team, NASA GSFC |
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This media is a product of the Aqua mission Credit and attribution belongs to the mission team, if not already specified in the "author" row |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ![]() |
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