The <a href="https://en.wikipedia.org/wiki/Grand_Prismatic_Spring" class="extiw" title="w:Grand Prismatic Spring">Grand Prismatic Spring</a> of <a href="https://en.wikipedia.org/wiki/Yellowstone_National_Park" class="extiw" title="w:Yellowstone National Park">Yellowstone National Park</a> showing <a href="https://en.wikipedia.org/wiki/steam" class="extiw" title="w:steam">steam</a> rising from hot and sterile deep azure blue water (owing to the light absorbing <a href="https://en.wikipedia.org/wiki/overtone" class="extiw" title="w:overtone">overtone</a> of an <a href="https://en.wikipedia.org/wiki/Hydroxy" class="extiw" title="w:Hydroxy">OH</a> <a href="https://en.wikipedia.org/wiki/Infrared_spectroscopy" class="extiw" title="w:Infrared spectroscopy">stretch</a>  which is shifted to 698 nm by <a href="https://en.wikipedia.org/wiki/hydrogen_bonding" class="extiw" title="w:hydrogen bonding">hydrogen bonding</a> <a rel="nofollow" class="external autonumber" href="http://www.dartmouth.edu/~etrnsfer/water.htm">[1]</a>) in the center surrounded by huge mats of brilliant orange <a href="https://en.wikipedia.org/wiki/algae" class="extiw" title="w:algae">algae</a> and <a href="https://en.wikipedia.org/wiki/bacteria" class="extiw" title="w:bacteria">bacteria</a>. The color of which is due to the ratio of <a href="https://en.wikipedia.org/wiki/chlorophyll" class="extiw" title="w:chlorophyll">chlorophyll</a> to <a href="https://en.wikipedia.org/wiki/carotenoid" class="extiw" title="w:carotenoid">carotenoid</a> 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 <a href="https://en.wikipedia.org/wiki/microbes" class="extiw" title="w:microbes">microbes</a> produce more chlorophyll to compensate, thereby masking the carotenoid colors.
<a rel="nofollow" class="external text" href="https://sites.google.com/site/thebrockeninglory/">Brocken Inaglory</a>
<span class="int-own-work" lang="en">Own work</span>