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File:Sand Dunes, Junggar Basin, Northwestern China.JPG

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Description
English: This photograph taken by an astronaut on the International Space Station highlights a sand dune field within the Burqin-Haba River-Jimunai Desert near the borders of China, Mongolia, Russia, and Kazakhstan. The dune field (approximately 32 kilometres long) is located immediately west-northwest of the city of Burqin (not shown), and is part of the Junggar Basin, a region of active petroleum production in north-western China. The Irtysh River—with associated wetlands and riparian vegetation (appearing grey-green in the image) —flows from its headwaters in the Altay Mountains towards Siberia (right to left across the image).

Tan, linear dunes at image centre (on the south side of the Irtysh River) dominate the view. The dunes are formed from mobile barchan (crescent-shaped) dunes moving from left to right in this view. The barchans eventually merge to form the large, linear dunes which can reach 50 to 100 meters in height. Sand moving along the southern edge of the field appears to be feeding a south-eastern lobe with a separate population of linear dunes (image lower right).

The Burqin-Haba River-Jimunai Desert area also includes darker gravel-covered surfaces that form pavements known locally as gobi. At the resolution of an astronaut photograph, these are somewhat indistinguishable from the vegetated areas arresting some of the dunes. But gobi tend to be located on the flat regions between the dunes.
Date
Source NASA Earth Observatory
Author ISS Expedition 28 crew
Camera location47° 42′ 00″ N, 86° 24′ 00″ E Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS028-E-44444.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
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Image acquired with a Nikon D2Xs digital camera using a 180 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center.

Licensing

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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8 September 2011

47°42'0.000"N, 86°24'0.000"E

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current15:38, 19 September 2011Thumbnail for version as of 15:38, 19 September 20114,288 × 2,848 (12.22 MB)Originalwana{{Information |Description ={{en|1=This photograph taken by an astronaut on the International Space Station highlights a sand dune field within the Burqin-Haba River-Jimunai Desert near the borders of China, Mongolia, Russia, and [[Kaza

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