circumhorizontal arcs photographed by (click pic) david england, andy cripe, del zane, todd sackmann and brandon rios. this atmospheric phenomenon, otherwise known as a fire rainbow, is created when light from a sun that is at least 58 degrees above the horizon passes through the hexagonal ice crystals that form cirrus clouds which, because of quick cloud formation, have become horizontally aligned. (see also: previous cloud posts)
“A friend took this pic in Arizona USA. The meteorologists don’t have a name for it.
Seems to be high energy to be in a Rainbow and a tornado! ”
(source: Council of World Elders)
Voyage by Aether & Hemera
Media architect Claudio Benghi and light artist Gloria Ronchi joined together in 2006 to form Aether & Hemera, an interdisciplinary collaboration that seeks “to research the aesthetic challenges of light and its power to trigger emotions and response, creating a sense of identity or setting a mood.” Their latest installation in London’s Canary Wharf is this beautiful fleet of 300 illuminated boats called Voyage. Each floating light is reminiscent of a paper-folded origami boat that is illuminated from within, and I’m told there is a wireless network in the vicinity that allows you to join with your mobile device and somehow alter the color of the entire installation.
The Most Gorgeous Book Ever Has No Words Or Pictures, Just Color
This is the RGB Colorspace Atlas by Tauba Auerbach. The 8”x8” hardcover tome is pretty much an encyclopedia of every color in the RGB index. It’s huge, it’s gorgeous, and I want one.
Rainbow Eucalyptus trees shed their bark at different rates, freshly revealed patches will reveal a bright green color, which then darkens to give orange, maroon, and blue colors. (via)
Chris Cobb - There is Nothing Wrong in this Whole World (2004), 20,000-book color spectrum
The fire rainbow is the rarest of all naturally occurring phenomena. The clouds must be cirrus and at an altitude of 20,000 feet at least. There must be just the right amount of ice crystals present, as well.
The sun has to hit the clouds at exactly 58 degrees. It makes the rainbow appear to be on fire, hence the name. It’s actually cold as ice, though. In the weather world, the phenomena is known as a circumhorizontal arc.
It isn’t a traditional rainbow, per se, but an effect that happens when light passes through wispy cirrus clouds at high altitudes. Even more specifically, the hexagonal ice crystals that make up the cirrus clouds must be shaped like thick plates with their faces parallel to the ground for the fire rainbow to appear.
The light enters through a vertical side face of the hexagon and leaves through the bottom causing the light to refract, or bend, like in a prism. If the crystals are aligned precisely, then the whole cloud lights up as a rainbow.
Sebastien Preschoux - Color Theory, 2009
d4 (by parallel vision)