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Namib

earth science Maturity 11-13 Next article →

The Namib is a massive coastal desert located in Southern Africa.

Namib desert and ocean
Namib desert and ocean

It stretches along the Atlantic coast through Angola, Namibia, and South Africa. This desert is unique because it may be the oldest in the world. It has endured arid conditions for roughly 55 to 80 million years. Only the Atacama Desert in South America competes with it regarding age and aridity. The Namib is the only true desert in southern Africa. Most of the Namibian portion is protected by the country's constitution.

The desert's climate is driven by a specific interaction between air and water. The aridity is caused by the descent of dry air from the Hadley cell. This air is cooled by the cold Benguela Current along the coast. This interaction creates a thick fog belt that frequently envelops the desert. Coastal regions can experience more than 180 days of thick fog every year.

Oceanic fog sossusvlei4
Oceanic fog sossusvlei4

This fog is a vital source of moisture for many desert species. While the fog is helpful for life, it is a major hazard for ships. More than a thousand wrecks now litter the Skeleton Coast because of it.

The geography of the Namib changes as you move from the sea to the mountains. Near the coast, the geology consists of massive sand seas.

Namib Sand Sea buiobuione
Namib Sand Sea buiobuione

Some of these dunes are the second-largest in the world. In the Sossusvlei area, some dunes exceed 300 meters in height.

Sossusvlei
Sossusvlei

Further inland, the landscape shifts to gravel plains and scattered mountain outcrops. The desert gradually ascends in elevation toward the Great Escarpment. The sand in the Namib Sand Sea comes mostly from the Orange River. Geologists sometimes call this area the "wind displaced delta of the Orange River."

Temperature and rainfall vary significantly across different parts of the desert. The western Namib receives much less rain than the eastern side. The western regions receive about 5 mm of rain annually. In contrast, the eastern regions receive about 85 mm. Temperatures near the coast remain stable between 10 and 20 degrees Celsius. However, temperatures further inland are much more variable. Summer daytime temperatures can exceed 40 degrees Celsius. At night, temperatures can even drop below freezing.

Life in the Namib has adapted in remarkable ways to survive the dryness. Many species are endemic, meaning they are found nowhere else on Earth.

Welwitschia mirabilis(2)
Welwitschia mirabilis(2)

The Welwitschia is a famous endemic plant that acts like a living fossil. It grows two long, strap-shaped leaves that capture moisture from the fog. Insects like darkling beetles have also developed clever survival methods. One species, Onymacris unguicularis, uses its smooth back to collect fog droplets. These droplets then roll down to its mouth. Other beetles, like Lepidochora discoidalis, even build webs to capture water.

The fauna of the Namib includes both small and large animals. Most wildlife consists of arthropods and small animals that need very little water. However, larger mammals inhabit the northern regions and national parks. You can find lions, elephants, and rhinos near the Skeleton Coast. In the Namib-Naukluft National Park, mountain zebras live among the rocks.

Oryx Gazella Namib Desert
Oryx Gazella Namib Desert

The gemsbok is another notable resident. This antelope can raise its body temperature to 40 degrees Celsius to survive the heat. Near the ocean, brown fur seals and shorebirds thrive on rich fishery resources.

Human history in the Namib involves both nomadic groups and modern industry. Before the 20th century, the San people roamed the area. They gathered plants and hunted in the interior. Today, the desert is mostly uninhabited by humans. Small settlements and indigenous groups like the Ovahimba and Topnaar Nama still exist. Some parts of the desert are used for mining. The Sperrgebiet is a restricted area used for mining diamonds and salt.

Sperrgebiet-001
Sperrgebiet-001

This area is located near the mouth of the Orange River.

The Namib is a complex system where geology, ocean currents, and biology meet. The desert covers an area of approximately 800,000 square kilometers. It reaches from the Uniab River in the north to Lüderitz in the south. The movement of the desert is also a factor in its history. The desert slowly moves westward into the sea over many years. This movement has even caused shipwrecks to be found 400 meters inland. The Namib remains a vital area for both scientific study and conservation.

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🖼️ Images & Media (10)
File:Namib desert and ocean.JPG
Namib desert and ocean.JPG
File:Sossusvlei.jpg
Sossusvlei.jpg
File:Oceanic fog sossusvlei4.jpg
Oceanic fog sossusvlei4.jpg
File:Mondlandschaft Namibia 01.JPG
Mondlandschaft Namibia 01.JPG
File:Namib desert 5.JPG
Namib desert 5.JPG
Namib Sand Sea buiobuione.tif
File:Welwitschia mirabilis(2).jpg
Welwitschia mirabilis(2).jpg
File:Quiver trees, Namib Desert.jpg
Quiver trees, Namib Desert.jpg
File:Oryx Gazella Namib Desert.jpg
Oryx Gazella Namib Desert.jpg
File:Sperrgebiet-001.jpg
Sperrgebiet-001.jpg
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