Billede:Caspian Sea from orbit.jpg

[edit] Summary

Description: This is a view from orbit of the Caspian Sea as imaged by the MODIS sensor on the Terra satellite.

Caption: The original caption from NASA:

"The northern part of the Caspian Sea is plagued by a process called eutrophication, in which agricultural run-off rich in fertilizers stimulates rampant growth of algae 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 Volga River (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 June 11, 2003."

Credit: Jeff Schmaltz, MODIS Rapid Response Team, NASA/GSFC

Source: NASA website The Visible Earth:[1][2]

Unless otherwise noted, all images and animations made available through Visible Earth are generally not copyrighted. You may use NASA imagery, video and audio material for educational or informational purposes, including photo collections, textbooks, public exhibits, and Internet web pages. This general permission does not include the NASA insignia logo (the blue "meatball" insignia).

For commercial use, the use of some images may require further coordination through a NASA corporate associate (for example, ORBIMAGE is the required contact for the commercial use of any SeaWiFS images). Images in Visible Earth that require further commercial permissions are so noted.[3]

This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy). Warnings: Use of NASA logos (which include the current "meatball" logo, the old "worm" logo, and the seal) is restricted. Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [4] All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [5] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [6]

• Source: English Wikipedia, original upload 2 November 2004 by Kbh3rd