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Dust Over Lake Chad and Southern Aïr Mountains, Chad and Niger

18.2N 7.9E

March 24th, 2013 Category: Dust Storms

Chad – March 23rd, 2013

Dust blows across the Sahara Desert, creating a thin veil over Lake Chad (below) and south of the Aïr Mountains, a triangular massif in northern Niger (left edge). While the dust cross the southernmost part of the Aïr range, it does not affect the Tibesti Mountains, another volcanic range in Chad, to the northeast.

Dust Storm South of Aïr Mountains, Niger

14.2N 8.2E

December 28th, 2012 Category: Climate Change, Deserts, Dust Storms

Niger – December 25th, 2012

Dust in Niger blows around the Aïr Mountains, a plateau that forms an island of Sahel climate amidst the Sahara Desert sands and supports a wide variety of life. While the dust here appears to be carried northward, Niger’s neighbor to the south, Nigeria, is experiencing growing desertification as rising temperatures allow the edge of the Sahara Desert to creep closer to the country.

Plumes of Dust by Lake Chad and Aïr Mountains, Chad and Niger – December 26th, 2012

13.3N 14.1E

December 26th, 2012 Category: Deserts, Dust Storms, Fires, Image of the day

Niger and Chad – December 24th, 2012

Three plumes of dust from the Sahara Desert can be seen blowing west-southwestward in this image of West Africa. Near the center, northeast of Lake Chad, are two light, parallel plumes originating from the Bodélé Depression, in Chad. Near the left edge, south of the Aïr Mountains, in Niger, is the last plume of dust, darker tan in color than the other two and apparently carrying fewer particles. In the lower part of the full image, smoke and fires can be seen across the Central Africa Republic, Cameroon and Nigeria (right to left).

Aïr Mountains in Northern Niger

18.2N 7.9E

February 1st, 2012 Category: Deserts, Mountains

Niger - December 29th, 2012

Clouds hang over the Sahara Desert south of the Aïr Mountains in northern Niger. This triangular massif rises to more than 6,000 ft (1 830 m) and extends over 84 000 km². Lying in the midst of desert north of the 17th parallel, the Aïr plateau, with an average altitude between 500 and 900 m, forms an island of Sahel climate.

The massif is a plateau consisting of a Cambrian age erosion surface on Precambrian metamorphic rocks, punctuated by a series of flat-topped, granite intrusion peaks, which include Mont Idoukal-n-Taghès (Niger’s highest point at 2022 m). The massif contains volcanic features including the extinct caldera of Arakao, Cenozoic lava flows of hawaiite to trachyte composition, volcanic cones, tuff rings and one of the largest ring dike systems in the world.

Aïr Mountains by Ténéré Desert, Niger

18.2N 7.9E

January 15th, 2012 Category: Deserts, Mountains

Niger - January 6th, 2012

The Aïr Mountains form a triangular massif, located in northern Niger, within the Sahara desert. They rise to more than 6,000 ft (1 830 m) and extend over 84 000 km², and have an average altitude between 500 and 900 m. The mountains consist of nine almost circular massifs rising from a rocky plateau, bordered by the sand dunes and plain of the Ténéré Desert to the east (right edge).

The massif is a plateau consisting of a Cambrian age erosion surface on Precambrian metamorphic rocks, punctuated by a series of flat-topped, granite intrusion peaks, which include Mont Idoukal-n-Taghès (Niger’s highest point at 2022 m), Mont Tamgak (1988 m), Mont Greboun (1944 m), and others. The massif contains volcanic features including the extinct calderas, volcanic cones, and tuff rings.