This is a view from orbit of the <a href="//commons.wikimedia.org/wiki/Caspian_Sea" class="mw-redirect" title="Caspian Sea">Caspian Sea</a> as imaged by the MODIS sensor on the Terra satellite. <b>Caption:</b>  The original caption from <a href="//commons.wikimedia.org/wiki/NASA" title="NASA">NASA</a>: ::"The northern part of the Caspian Sea is plagued by a process called <a href="//commons.wikimedia.org/w/index.php?title=Eutrophication&amp;action=edit&amp;redlink=1" class="new" title="Eutrophication (page does not exist)">eutrophication</a>, in which agricultural run-off rich in <a href="//commons.wikimedia.org/wiki/Fertilizer" class="mw-redirect" title="Fertilizer">fertilizers</a> stimulates rampant growth of <a href="//commons.wikimedia.org/w/index.php?title=Algae&amp;action=edit&amp;redlink=1" class="new" title="Algae (page does not exist)">algae</a> in the water. The death and decay of these algae robs the water of oxygen, with obvious negative consequences for aquatic life. This image of the Caspian Sea shows swirls of green and blue near the mouth of the <a href="//commons.wikimedia.org/wiki/Volga_River" class="mw-redirect" title="Volga River">Volga River</a> (top center), which indicate the presence of algae. The bright blue color of the northeastern part of the sea may be due to a mixture of plant life and sediment, for this is where the sea is most shallow. This image is from the Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite on <a href="//commons.wikimedia.org/wiki/June_11" title="June 11">June 11</a>, <a href="//commons.wikimedia.org/wiki/2003" title="2003">2003</a>.
Jeff Schmaltz, MODIS Rapid Response Team, NASA/GSFC
2003-06-11
<p><a rel="nofollow" class="external free" href="http://visibleearth.nasa.gov/view_rec.php?id=5514">http://visibleearth.nasa.gov/view_rec.php?id=5514</a>
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<ul><li>Transferred from English Wikipedia, original upload 2 November 2004 by <a href="https://en.wikipedia.org/wiki/User:Kbh3rd" class="extiw" title="en:User:Kbh3rd">Kbh3rd</a> <a href="https://en.wikipedia.org/wiki/Image:Caspian_Sea_from_orbit.jpg" class="extiw" title="en:Image:Caspian Sea from orbit.jpg">en:Image:Caspian Sea from orbit.jpg</a></li></ul>