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Posts tagged Lake Tana

Lake Tana and Dust Over Red Sea

12.1N 37.3E

October 23rd, 2012 Category: Dust Storms, Lakes

Red Sea – October 21st, 2012

Dust blows off the coast of Eritrea, northward over the Red Sea towards the Dahlak Archipelago, an island group composed of over one hundred islands. Visible at the lower left is Lake Tana, in Ethiopia, the source of the Blue Nile River.

Dust Over the Afar Depression, Ethiopia and Eritrea

12.3N 40.7E

June 10th, 2012 Category: Dust Storms

Ethiopia - June 9th, 2012

Dust blows across the Red Sea and the Bab-el-Mandeb Strait (upper right), over Eritrea (by the coast) and over Ethiopia. In Ethiopia, it is hemmed in and funneled southwards by the mountains bordering the Afar Region. The name of the funnel-shaped area is the Afar Depression or Afar Triangle, a geological depression that is caused by the Afar Triple Junction which is part of the Great Rift Valley. It overlaps Eritrea, Djibouti and the entire Afar Region of Ethiopia. Visible near the left edge, unaffected by the dust, is the green Lake Tana.

Dust Blowing Across Red Sea and Over Ethiopia

12.1N 37.3E

May 31st, 2012 Category: Dust Storms, Lakes

Red Sea - May 31st, 2012

Dust blows from the Arabian Peninsula, across the Red Sea, and over Eritrea, Djibouti and Ethiopia. A ridge of mountains in Ethiopia seems to keep the dust from blowing further westward, over Lake Tana (the green body of water near the image center). The lake is the source of the Blue Nile, located in the Amhara Region in the north-western Ethiopian highlands. The country’s largest lake, it is approximately 84 kilometers long and 66 kilometers wide, with a maximum depth of 15 meters, and an elevation of 1,840 meters.

Dust Storm Over Ethiopia and Neighboring Countries

12.1N 37.3E

February 28th, 2012 Category: Dust Storms

Dust Over Africa - February 27th, 2012

A thick cloud of dust blows over Ethiopia, Kenya, Uganda and South Sudan, obscuring much of the land below. Some dust reaches the green Lake Tana, in Ethiopia, in the upper right quadrant. Parts of South Sudan, near the green Jur River near the image center, are dust free.

A dust storm (also called a sand storm) is a meteorological phenomenon that occurs frequently in arid and semi-arid regions. Dust storms arise when a strong winds blow loose sand and dirt particles off a dry surface. Particles are transported by saltation and suspension, causing soil to move from one place and be deposited in another. The Sahara and drylands around the Arabian peninsula are the main sources of airborne dust.

Bright Green Waters of Lake Tana in Ethiopian Highlands – January 18th, 2012

12.1N 37.3E

January 18th, 2012 Category: Image of the day, Lakes, Mountains

Ethiopia - December 29th, 2011

The bright green lake in the center of this image is Lake Tana, the source of the Blue Nile and is the largest lake in Ethiopia. Located in Amhara Region in the north-western Ethiopian highlands the lake is approximately 84 kilometers long and 66 kilometers wide, with a maximum depth of 15 meters, and an elevation of 1,840 meters.

The Ethiopian Highlands are a rugged mass of mountains in Ethiopia, Eritrea (which is sometimes referred to as the Eritrean Highlands), and northern Somalia in the Horn of Africa. They can be observed more extensively upon opening the full image. The Ethiopian Highlands form the largest continuous area of its altitude in the whole continent, with little of its surface falling below 1500 m (4,921 ft), while the summits reach heights of up to 4550 m (14,928 ft).