Nature's Blue & Grey

Interesting contract between the "blue" glacier and the Grey Lake.

Brief excerpt: The Southern Patagonian Ice field of Chile and Argentina hosts several spectacular glaciers—including Grey Glacier located in the Torres del Paine National Park in Chile. This glacier, which in 1996 had a measured total area of 270 square kilometers and a length of 28 kilometers (104 square miles in area, 17 miles long), begins in the Patagonian Andes Mountains to the west and terminates in three distinct lobes into Grey Lake (upper image). The upper image is a photograph taken by an astronaut aboard the International Space Station, and it captures a striking blue coloration of the glacier. The coloring is due to the ice’s absorption of red wavelengths of light and scattering of blue wavelengths of light as it is transmitted through the ice.


Full story:

http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17685