Attēls:Grand prismatic spring.jpg - Vikipēdija

# Attēls:Grand prismatic spring.jpg

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Aerial view of Grand Prismatic Spring; Hot Springs, Midway & Lower Geyser Basin; Jim Peaco; July 2001 Yellowstone National Park Image by NPS Photo

The Grand Prismatic Spring of Yellowstone National Park showing steam rising from hot and sterile deep azure blue water (owing to the light absorbing overtone of an OH stretch which is shifted to 698 nm by hydrogen bonding [1]) in the center surrounded by huge mats of brilliant orange algae and bacteria. The color of which is due to the ratio of chlorophyll to carotenoid molecules produced by the organisms. During summertime the chlorophyll content of the organisms is low and thus the mats appear orange, red, or yellow. However during the winter, the mats are usually dark green, because sunlight is more scarce and the microbes produce more chlorophyll to compensate, thereby masking the carotenoid colors.

Location | 44°31′30″N, 110°50′18″W (Map)

Source: http://www.nps.gov/yell/slidefile/thermalfeatures/hsandterraces/midwaylower/page-4.htm ; English Wikipedia, original upload 1 April 2004 by ChrisO

| This is a featured picture on Wikimedia Commons. We believe it is one of the finest images on Commons. If you have an image of similar quality that can be published under a suitable copyright license, be sure to upload it, tag it, and nominate it.

| This image or media file contains material based on a work of a National Park Service employee, created during the course of the person's official duties. As a work of the U.S. federal government, such work is in the public domain. See the NPS website and NPS copyright policy for more information. |

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