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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.

Kampala Near Lake Victoria, Uganda – February 15th, 2012

0.3N 32.5E

February 15th, 2012 Category: Image of the day, Lakes

Uganda- February 3rd, 2012

This orthorectified wide-swath ASAR image focuses on Lake Victoria, an African Great Lake and the continent’s largest lake by surface area, at 68,800 square kilometres (26,600 sq mi). It is the second largest freshwater lake by surface area in the world. In terms of its volume, Lake Victoria is the world’s eighth largest continental lake, and it contains about 2,750 cubic kilometers (2.2 billion acre-feet) of water.

Visible as a white area near the northern shores is Kampala, the largest city and capital of Uganda. Kampala features a tropical wet and dry climate, however due to city’s higher altitudes, average temperatures are noticeably cooler than what is typically seen in other cities with this type of climate. Another facet of Kampala’s weather is that it features two distinct wet seasons. There is a lengthy rainy season from August through December and another shorter rainy season that begins in February and lasts through June.

Sun Glint Highlighting Contours of Lake Victoria, Uganda, Tanzania and Kenya

1.2S 32.7E

February 12th, 2012 Category: Lakes

Uganda, Kenya and Tanzania - February 5th, 2012

Sun glint causes the waters of Lake Victoria, on of the African Great Lakes, to appear silvery in color, and makes the ragged contours of the shoreline easily visible against the surrounding brown terrain. The lake has a shoreline of 4,828 kilometres (3,000 mi), with islands constituting 3.7% of this length, and is divided among three countries: Kenya (6% or 4,100 km2/1,600 sq mi), Uganda (45% or 31,000 km2/12,000 sq mi) and Tanzania (49% or 33,700 km2/13,000 sq mi).

With a surface area of 68,800 square kilometres (26,600 sq mi), Lake Victoria is Africa’s largest lake by area, and it is the largest tropical lake in the world. Lake Victoria is the world’s second largest freshwater lake by surface area (only Lake Superior in North America is larger). In terms of its volume, Lake Victoria is the world’s eighth largest continental lake, and it contains about 2,750 cubic kilometers (2.2 billion acre-feet) of water.

Sediments in Southern, Swampy Section of Lake Albert, Uganda and DRC

1.7N 30.9E

January 4th, 2012 Category: Lakes

Uganda and the Democratic Republic of the Congo - December 25th, 2011

Lake Albert – also Albert Nyanza and formerly Lake Mobutu Sese Seko – is one of the African Great Lakes. It is Africa’s seventh-largest lake, and the world’s twenty-seventh largest lake by volume. Lake Albert is located in the center of the continent, on the border between Uganda and the Democratic Republic of the Congo.

Lake Albert is the northernmost of the chain of lakes in the Albertine Rift, the western branch of the East African Rift. It is about 160 km (100 mi) long and 30 km (19 mi) wide, with a maximum depth of 51 m (168 ft), and a surface elevation of 619 m (2,030 ft) above sea level.

Lake Albert is part of the complicated system of the upper Nile. Its main sources are the Victoria Nile, ultimately coming from Lake Victoria to the southeast, and the Semliki River, which issues from Lake Edward to the southwest. The water of the Victoria Nile is much less saline than that of Lake Albert. Its outlet, at the northernmost tip of the lake, is the Albert Nile (which becomes known as the Mountain Nile when it enters South Sudan).

At the southern end of the lake, where the Semliki comes in, there are swamps. Here, sediments can be seen tinging the waters in this section of the lake. Farther south loom the mighty Ruwenzori Range, while a range of hills called the Blue Mountains tower over the northwestern shore. The few settlements along the shore include Butiaba and Pakwach.

Lakes Turkana and Kyoga and Mount Elgon, Uganda and Kenya – December 31st, 2011

3.6N 36.0E

December 31st, 2011 Category: Image of the day, Lakes, Volcanoes

Uganda and Kenya - December 29th, 2011

The image focuses on Lake Turkana, formerly known as Lake Rudolf, is a lake in the Great Rift Valley in Kenya, with its far northern end crossing into Ethiopia. Here, sediments and algal growth turn the lake’s color from tan in the north to green and then a dark, bluish green in the south.

It is the world’s largest permanent desert lake and the world’s largest alkaline lake. The rocks of the surrounding area are predominantly volcanic. Central Island is an active volcano, emitting vapors. Outcrops and rocky shores are found on the East and South shores of the lake, while dunes, spits and flats are on the West and North, at a lower elevation.

Visible at the bottom edge of the image are Lake Kyoga, a large shallow lake complex of Uganda, and Mount Elgon, an extinct shield volcano on the border of Uganda and Kenya. It is the oldest and largest solitary volcano in East Africa, covering an area of around 3500 km². Lake Kyoga has an area of about 1,720 km2. The Victoria Nile flows through the lake on its way from Lake Victoria to Lake Albert.