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File:Har Nuur.jpg

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English: Image caption and information available at [1]

Khar Nuur, or the Black Lake, is located in western Mongolia's Valley of Lakes, part of a system of closed basins stretching across central Asia. These basins are the remnants of larger paleolakes (paleo- means "ancient") that began to shrink approximately 5,000 years ago as regional climate became drier. Like other lakes in the region, Khar Nuur relies on precipitation, growing in the spring and shrinking in the summer. This process of growth and shrinkage produces a variety of wetland habitats, as well as resting points for large numbers of migratory birds.

This photograph captures the dynamic nature of the landscape of Khar Nuur. The lake is encircled by sand dune fields that encroach on the lower slopes of the Tovkhosh Mountains to the west and south. Gaps in the mountains have been exploited by sand dunes moving eastward, indicating westerly winds. The most striking example is a series of dunes entering Khar Nuur along its southwestern shoreline. Here, the dunes reflect the channeling of winds through the break in the mountain ridgeline, leading to dune crests lying perpendicular to northwesterly winds. Another well-developed line of dunes appears between Khar and Baga Lakes; while these dunes appear to cut across a lake surface, the dunes have in fact moved across a narrow stream channel.

This image was acquired Sept. 7, 2006, by the crew of the International Space Station

Kodak 760C digital camera using a 400 mm lens, [1]

Image credit: NASA
Data
Fonte https://eol.jsc.nasa.gov/SearchPhotos/photo.pl?mission=ISS013&roll=E&frame=78506
Autore NASA
Altre versioni Image:Khar-Nuur, Mongolia, hi-res.JPG

Licenza

Public domain
"The Gateway to Astronaut Photography of Earth". Le immagini provengono dall'Image Science & Analysis Laboratory, della NASA Johnson Space Center.
Fonte della foto: ISS013-E-78506.

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  • 2006-10-17 19:45 Niro5 1000×618×8 (210556 bytes) Image caption and information available at [http://www.nasa.gov/multimedia/imagegallery/image_feature_677.html] Khar Nuur, or the Black Lake, is located in western Mongolia's Valley of Lakes, part of a system of closed basins stretching across central As
  1. ↑ [2]

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attuale22:54, 25 apr 2019Miniatura della versione delle 22:54, 25 apr 20192 152 × 1 336 (754 KB)Ras67high resolution
09:49, 7 mag 2007Miniatura della versione delle 09:49, 7 mag 20071 000 × 618 (206 KB)Latebird{{Information |Description={{En|Image caption and information available at [http://www.nasa.gov/multimedia/imagegallery/image_feature_677.html] Har Nuur, or the Black Lake, is located in western Mongolia's Valley of Lakes, part of a system of closed basi

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