Sun dogs light up the sky


#1

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#2

The sun dog is beautiful, but so are the intricate ice patterns on the window. Cold weather may not always be fun but it can produce some amazing effects.


#3

It took me a short while to figure out that those patterns were on the window, and not smoke/steam from the industrial complex being caught by the light of the sun...

But yes, patterns in ice (and in nature as a whole) fascinate me. Try to find a beach with lots of shale/broken up slate - it seems to re-arrange itself into the most fascinating of patterns all on it's own.


#4

Stone burner!


#5

Isn't this actually a sun pillar? http://apod.nasa.gov/apod/ap010313.html

Example of sun dogs: http://www.atoptics.co.uk/halo/parhelia.htm


#6

Last Friday had freezing fog in Albuquerque. My wife took a wonderful photo of the sun rising over the football stadium outside of her call center, with one of the best examples of a Sun Dog I've ever seen here in NM: http://imgur.com/pfdD0nM


#7

More than you ever wanted to know about the the optics of ice halos (and other atmospheric optics, too - rainbows and glories and crepuscular rays, oh my!) including simulator software that lets you specify conditions, sun angle, etc., and then calculates the resulting halo(es):

http://www.atoptics.co.uk/halosim.htm


#8

Beautiful fractals of frost in the window. Looks strikingly like the Mandelbrot Set. It took me a moment to realize that that wasn't what the post was about.


#9

Interesting photos and links. I was in Minneapolis last week for work, and saw those. I was so cold and sleepy, I didn't give it much thought.


#10

I think it's an image of both - sun pillar rising up out of the setting sun, and a sun dog seen to the right of it.


#11

Whether you get a halo or a sun dog depends on which way the ice crystals are oriented in relation to you.

Does this mean that if I were in a plane directly over the sundog I would see a circle?


#12

Yes, it's a sun pillar. No sundogs to be seen in this picture.


#13

I suppose you're referring to that bright streak to the right of the sun? I'm afraid that's just a wisp of cloud (perhaps a contrail) being lit up. A proper sundog would appear much further to the right/left. As cbrewer314 already pointed out, what we're seeing here is not a sundog, but a sun pillar.

To all those who would like to learn more about these phenomena and their proper nomenclature, I can cordially recommend paying a visit to the link glenblank posted. There is also a subreddit dedicated to the subject at www.reddit.com/r/atoptics.


#14

Same here. I thought that was a Fractal Mr. Punch near the lower right.


#15

I'll let myself out.


#16

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