View Full Version : MODIS: Central Asia

tlr online
02-02-04, 00:02
Scattered lakes and mountain ranges glow with jewel-like tones of green and blue in the midst of central Asia, shown here in this true-color Terra MODIS image from September 8, 2003. At the top of the image, streaks of dark green follow ridges of high land on the southern edge of the Western Siberian Plateau, located in southern Russia. The green grows more intense as it covers the Zapadnyy Sayan Mountains, which run along the border of northwestern Mongolia.

Just inside the Mongolian border, the Uvs (upper) and Hyargas (middle) lakes are a tranquil deep blue with small swirls of green along the lake edges. In central western Mongolia, the Har Us (lower left) and Har (lower right) lakes are a lighter green color, with areas of darker blue clear water.

In northwestern China, one small lake stands out in the northern reaches of the Junggar Basin - the Ulungur, which is the largest body of water in the region. Almost due east from the Ulungur, on the Kazakhstan side of the border, Lake Zaysan has even more intense swirls of green in its body. And the Balkash and Alakol' lakes lie like two chips of turquoise on the high planes north of the Tien Shan Mountains (which run along image bottom). The vibrant colors swirling through all of these lakes are the result of sediments in the water and probably also the presence of microscopic plant life, like algae.

Scattered throughout the image are tiny red dots, all of which represent actively burning fires. Some of the fires, especially those in eastern Kazakhstan, show visible smoke plumes, which look like streaks of white or gray.


Copyright 2004 NASA

02-02-04, 00:35
Wow, part of that looks really green! http://www.tombraiderforums.com/images/smilies/tongue.gif I never knew there could be that dramatic of a change from desert to "lush" areas.

I can't remember, but did you have a recent picture of the Aral Sea that you put up?

02-02-04, 01:29
The green would be from the orographic effect. This region is in the prevailing westerlies, the same planetary circulation belt as us (notice the eastern slopes are drier). Also, the north slopes of the mountains experience less evapotranspiration and drought during the summer.

02-02-04, 01:37
Wow, gonga you put NASA to shame! :D ;)

02-02-04, 01:43
The trick is to keep one step ahead of yer students at all times :D

Heck, I'm no meteorologist - I'm a geologist. But I'd love to play with the "blue screen" someday http://www.tombraiderforums.com/images/smilies/whistle.gif