03 Dec '11, 11pm

Eastern Namibia Sand Dunes

The Namib Desert may be the best-known desert in Namibia, but it is not the only one. Eastern Namibia is also dry, though slightly less so. This part of the country holds part of the expansive Kalahari Desert, home to some visually striking dunes. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite captured this image on May 7, 2007. ASTER combines infrared, red, and green wavelengths of light to make false-color images. Thick vegetation lining the Nossob River appears bright red. The rest of the sparsely vegetated landscape appears in shades of purple-brown and burnt orange. The long, thin, diagonal stripes are linear dunes, which occur along the southwestern margin of the Kalahari Desert. Linear dunes typically form in arid environments with consistent wind patterns. Research conducted in the 1980s and 1990s found that cur...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=76579&s...

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Eastern Namibia Sand Dunes: Linear dunes domina...

earthobservatory.nasa.gov 03 Dec '11, 11pm

The Namib Desert may be the best-known desert in Namibia, but it is not the only one. Eastern Namibia is also dry, though ...

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