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Posts tagged Great Lakes Depression

Smoke From Fires in Russia Blows South Towards Mongolia

55.4N 87.0E

July 4th, 2012 Category: Fires

Russia – June 28th, 2012

Hundreds of wildfires continue to burn across Russia, and more than 14 new fires have broken out over the past 24 hours (click here for previous images). While eleven of them have been put out, firefighters are still struggling to extinguish another 32 blazes. Authorities say the fires do not pose a threat to residential areas.

Here, smoke from fires north of the border area between Russia (above) and Mongolia (lower right) and Kazakhstan (lower left) can be observed blowing towards the south. Visible in the lower right quadrant is Mongolia’s Great Lakes Depression, including the large, rounded Lake Uvs Nuur.

Lakes in Mongolia’s Great Lakes Depression

50.2N 92.6E

May 7th, 2012 Category: Lakes

Mongolia - May 6th, 2012

As its name would suggest, Mongolia’s Great Lakes Depression contains several large bodies of water. Visible near the top edge is Lake Uvs Nuur, which appears bright white here as its surface is frozen.

In the center of the image, south of Lake Uvs, are Lake Khyargas (above) and Lake Airag (below). The former is significantly larger than the latter. It is dark blue in color, although the eastern half is slightly greener. The smaller Lake Airag is bright green.

Continuing south, several other lakes can be observed near the bottom of the image: Lake Khar, Lake Dörgön and Lake Khar-Us (right to left). These lakes show varying shades of blue, green and brown.

Ice on Surface of Lake Uvs Nuur, Mongolia

50.2N 92.6E

May 16th, 2011 Category: Lakes

Mongolia - May 2nd, 2011

Several bodies of water can be observed here, in Mongolia’s Great Lakes Depression. At the top of the image is Lake Uvs Nuur, whose surface is frozen and appears bright white.

South of Lake Uvs are Lake Khyargas, ice-free and dark turquoise in color and Lake Airag, smaller, also ice-free and mint-green in color.

Several other lakes can be observed near the bottom of the image, including Lake Khar, Lake Dörgön and Lake Khar-Us (right to left). Although these lakes appear mostly green in color, some patches of ice can be seen on the surface of Lakes Khar and Khar-Us.

Mongolia’s Great Lakes Depression – November 12th, 2009

46.0N 105.0E

November 12th, 2009 Category: Image of the day, Lakes, Rivers

Mongolia - October 7th, 2009

Mongolia - October 7th, 2009

The lakes visible here in the Khyargas District of Mongolia’s Uvs Province are part of the same system interconnected lakes in the Great Lakes Depression.

The large, dark greenish blue lake at the top is Lake Khyargas, upon which the Khyargas Nuur National Park is based.  This protected area was established in 2000 and covers about 3,328 km². It also includes the smaller, lighter green, freshwater Lake Airag, just south of Lake Khyargas.

In the lower left quadrant is Lake Khar-Us. Its area value of 1,852 km² includes the island Agbash (or Ak-Bashi, White Head) with an area of 274 km², so the water surface area is 1,578 km² only. Here, the island appears to almost separate the bright green western side of the lake from the brown right side. Primary inflow is the Khovd Gol river, which creates a large fan-shaped river delta on the western shores.

Finally, in the lower right quadrant are Lakes Khar and Dörgön. The waters of Lake Khar, above, appear green, while those of Lake Dörgön, below, appear dark blue.

Uvs Nuur, Mongolia’s Largest Lake – June 23rd, 2009

50.2N 92.6E

June 23rd, 2009 Category: Image of the day, Lakes, Rivers

Lake Uvs, Mongolia - June 8th, 2009

Lake Uvs, Mongolia - June 8th, 2009

Lake Uvs, or Uvs Nuur, is a highly saline lake in an endorheic basin in Mongolia with a small part in Russia – its northeastern tip, situated in Russia’s Tuva Republic. All of the lake and many parts of its surroundings have been declared protected sites.

It is the largest lake in Mongolia by surface area, covering 3,350 km² at 759 m above sea level. Uvs Nuur has a length of 84 km and a width of 79 km, with an average depth of 6 m. This shallow and very saline body of water is the remainder of a huge saline sea which covered a much larger area several thousand years ago.

Its basin is separated from the rest of the Great Lakes Depression by the Khan Khökhii ridge. However, it is not a rift lake as some mistakenly think.

The main feeding rivers are the Baruntara Gol, Nariin Gol, and Tesiin Gol from the Khangai Mountains in the east, and the Kharkhiraa River and Sangil Gol from the Altai Mountains in the west. All of these can be

The very large catchment area with no exit results in highly saline water (18.8 ppt, 5 times saltier than the oceans), primarily due to sulphate and sodium ions.

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