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Posts tagged von Karman vortices

Dust Blowing Over Cape Verde Islands – May 27th, 2012

16.2N 23.5W

May 27th, 2012 Category: Dust Storms, Image of the day

West Africa - May 25th, 2012

Close-up

Dust blows over Mauritania (above) and Senegal (below), off the coast of West Africa, and over the Cape Verde Archipelago (left edge and close-up). In the close-up,  loose swirls of clouds – remnants of von Kármán vortex streets – can be seen south and southwest of the islands.

 

Dust Off Coast of Western Sahara and Mauritania

22.2N 16W

May 26th, 2012 Category: Dust Storms

West Africa - May 23rd, 2012

Dust blows off the coast of Western Sahara (above) and Mauritania (below) in this image of West Africa. The dust blows due southwestward over the Atlantic Ocean. North of the airborne sands are the Canary Islands, just off the coast of Morocco and Western Sahara. The loose remnants of spiralled von Kármán vortex streets can be seen in the clouds southwest of the islands.

 

Dust and von Kármán Vortex Streets Off Coast of West Africa

15.9N 19.8W

May 17th, 2012 Category: Clouds, Dust Storms

West Africa - May 17th, 2012

Dust blows over Mauritania (upper right) and Senegal (lower right), off the coast of West Africa, and over the Cape Verde archipelago (center left). The dust appears most dense in the upper right quadrant, just west of the Bay of Arguin, whose green waters are significantly obscured by the airborne particles. Also visible through the dust is the Senegal River, a green line near the center right, marking the Mauritania-Senegal border. Visible through the veil of dust in the lower left quadrant are von Kármán vortex streets, created by the movement of air over the Cape Verde islands.

Fires Near Western Coast and Cloud Streets, Mexico – April 28th, 2012

20.2N 103W

April 28th, 2012 Category: Clouds, Fires, Lakes

Mexico - April 19th, 2012

Lake Chapala, visible near the center of the right edge, appears bright silvery white due to sun glint in this image of northwestern Mexico. The southern tip of the Baja California peninsula extends into the upper left quadrant of the image. Upon opening the full image, plumes of smoke several wildfires can be seen by the mountains parallel to the coast, northwest of Lake Chapala and southeast of the peninsula.

Visible in the lower left quadrant are von Kármán vortex streets, parallel rows of swirled clouds that form as air currents pass over bluff bodies. In this case, the bluff body is Socorro Island, one of the four volcanic islands in the Revillagigedo Archipelago, belonging to Mexico.

Dust and Cloud Vortex Streets by Canary Islands

30.7N 16.1W

March 17th, 2012 Category: Clouds, Dust Storms

Dust off West Africa - March 17th, 2012

A plume of dust blows southwestward off the coast of Morocco and over the Atlantic Ocean, passing north of the Canary Islands (click here for previous images).

Visible through the veil of dust are  patterns swirled, roughly symmetrical clouds. This phenomenon is known as cloud vortex streets, or von Karman vortices. They are created by winds rushing over islands in the Atlantic.