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Posts tagged Western Sahara

Kármán Vortex Streets Trailing Off Cape Verde and Canary Islands – June 20th, 2013

21.8N 18.5W

June 20th, 2013 Category: Clouds, Image of the day VIIRSSuomi-NPP

West Africa – June 19th, 2013

West of Western Sahara, Mauritania and Senegal, off the coast of West Africa, is an atmospheric phenomenon known as Kármán Vortex Streets. These parallel rows of oppositely spinning vortices, caused by the unsteady separation of flow of a fluid around blunt bodies, can be seen trailing off the Canary Islands (above) and off the Cape Verde islands (below). Some dust can also be seen spreading off the coast of Mauritania.

Dust Off West Africa Coast from Western Sahara to Guinea Bissau

13.5N 17W

February 3rd, 2013 Category: Dust Storms

West Africa – February 1st, 2013

Dust from the Sahara Desert blows westward, off the coast of West Africa, including the countries of Western Sahara, Mauritania, Senegal, the Gambia and Guinea Bissau (along coast, from top to bottom). Partially visible through the dust are bodies of water such as the Bay of Arguin (above, in Mauritania) and the mouth of the Geba River (below, in Guinea Bissau).

Dust From Western Sahara to Mauritania

23.6N 15.9W

January 14th, 2013 Category: Climate Change, Dust Storms

West Africa – January 7th, 2013

Sahara Desert dust blows due west off the coast of West Africa. It is thickest from Western Sahara’s Dakhla Peninsula to below the Bay of Arguin, in Mauritania. The dust has not spread northwards into Morocco or over the Canary Islands (top). However, winds can carry such clouds of dust across the Atlantic Ocean, affecting the Caribbean, Gulf of Mexico and southern and eastern USA.

The presence of high concentrations of dust for such long periods of time may have a negative impact on human health. Also, if increased aridity caused large increases in dust transport to the ocean, there could be major consequences that transcend the direct impact on marine organisms. Changes in climate would also affect the amounts and the types of microorganisms associated with dust.

Parallel Dust Plumes Inland and Off Western Sahara Coast

25.7N 16.2W

January 3rd, 2013 Category: Dust Storms

Mauritania – December 28th, 2012

Plumes of dust blow across Western Sahara and northern Mauritania. Dust plumes, appearing as parallel streaks, are visible both inland and off the coast. A thinner cloud of dust can be seen blowing further west over the Atlantic Ocean. Visible to the north of this cloud are the Canary Islands.

Dust South of Fuerteventura, Canary Islands

28.3N 14W

December 31st, 2012 Category: Dust Storms

Canary Islands – December 28th, 2012

Dust blows off the coast of Western Sahara and to the northwest, towards the Canary Islands. Although thick plumes have not reached the islands, one can be seen just south of Fuerteventura (right edge). The archipelago is usually affected by large dust storms several times per yer that may last up to a week.