Yellowstone Sundog
by Priscilla Burgers
Title
Yellowstone Sundog
Artist
Priscilla Burgers
Medium
Photograph - Photography
Description
This image is of an early morning sundog at a bend in the Madison River at Yellowstone National Park. A sundog is an atmospheric phenomenon that creates bright spots of light in the sky, often on a luminous ring on either side of the sun. Sundogs may appear as a colored patch of light to the left or right of the sun the same distance above the horizon as the sun, and in ice halos. They are most conspicuous when the sun is low. Sundogs are made by the refraction of light from plate-shaped hexagonal ice crystals in high and cold cirrus clouds or during very cold weather. These crystals act as prisms, bending the light rays passing through them. If the crystals are randomly oriented, a complete ring, or halo, is seen around the sun. Often, as the crystals sink through the air, they become vertically aligned, so sunlight is refracted horizontally and sundogs are formed. Sundogs are red-colored at the side nearest the sun. Farther out the colors grade through oranges to blue and finally merge into white. The colors overlap and are muted, never pure or saturated.
FAA Featured Photo:
Nature Landmarks Landscapes Wildlife Group - 7/23/2016
Uploaded
July 17th, 2013
Statistics
Viewed 350 Times - Last Visitor from Beverly Hills, CA on 04/25/2024 at 12:27 AM
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