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Fire Rainbow

Fire Rainbow - fire, sky, rainbow, rare, trees
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Wallpaper Description:
Photography on 4-27-2018

So what combination of clouds, moisture, and light come together to create these beautiful circumhorizontal arcs? How are they the same, and different, from the usual rainbows we see?

Basically, ice crystals in wispy, high-altitude cirrus clouds act like thousands of tiny prisms, similar to the role of raindrops in a normal rainbow. For a fire rainbow to appear, those hexagonal crystals need to be lined up perfectly and so does the sun, which must be very high in the sky (at least 58 degrees above the horizon). As sunlight streams through the cloud at the right angle, the crystals refract the light and create an array of colors.

The likelihood of seeing one of the arcs depends on where you live. Latitude is crucial; the further from the equator you are, the less time the sun is sufficiently high enough in the sky. In the US, the arcs may be seen five or more times each summer, according to the website Atmospheric Optics. The site also adamantly clarifies that the colorful arc “is not a rainbow and has nothing to do with fire.”

“There’s no real way of predicting these types of things, the same way we can’t predict rainbows,” says Roger Gass, a meteorologist with the NWS Bay Area office, who has never seen a fire rainbow himself. “It’s always worth looking up in the sky to see what’s there.”
blueangels1015 Uploaded by blueangels1015 on . Fire Rainbow - Desktop Nexus Nature Download free wallpapers and background images: Fire Rainbow. Desktop Nexus Nature background ID 2373584. Photography on 4-27-2018

So what combination of clouds, moisture, and light come together to create these beautiful circumhorizontal arcs? How are they the same, and different, from the usual rainbows we see?

Basically, ice crystals in wispy, high-altitude cirrus clouds act like thousands of tiny prisms, similar to the role of raindrops in a normal rainbow. For a fire rainbow to appear, those hexagonal crystals need to be lined up perfectly and so does the sun, which must be very high in the sky (at least 58 degrees above the horizon). As sunlight streams through the cloud at the right angle, the crystals refract the light and create an array of colors.

The likelihood of seeing one of the arcs depends on where you live. Latitude is crucial; the further from the equator you are, the less time the sun is sufficiently high enough in the sky. In the US, the arcs may be seen five or more times each summer, according to the website Atmospheric Optics. The site also adamantly clarifies that the colorful arc “is not a rainbow and has nothing to do with fire.”

“There’s no real way of predicting these types of things, the same way we can’t predict rainbows,” says Roger Gass, a meteorologist with the NWS Bay Area office, who has never seen a fire rainbow himself. “It’s always worth looking up in the sky to see what’s there.”
Rating: 4.1

Wallpaper Comments (2)

emma999
Posted by emma999 on 04/30/18 at 02:43 AM
Explanation is 100% wrong. Not your fault blueangels. :D:D
Love_Story
Posted by Love_Story on 04/29/18 at 04:07 PM
Nice.
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Total Downloads: 180
Times Favorited: 3
Uploaded By: blueangels1015
Date Uploaded: April 29, 2018
Filename: FireRainbow.jpg
Original Resolution: 1920x1200
File Size: 345.83KB
Category: Sky

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