#1 By: Maggie Koerth-Baker, December 9th, 2013 09:09
#2 By: Christopher Waldrop, December 9th, 2013 09:41
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 By: Geraint Jones, December 9th, 2013 09:51
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 By: t3kna, December 9th, 2013 09:54
#5 By: Chris Brewer, December 9th, 2013 10:39
#6 By: deaduncledave, December 9th, 2013 10:47
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 By: Glen Blank, December 9th, 2013 12:40
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):
#8 By: SamSam, December 9th, 2013 12:45
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 By: JamesB, December 9th, 2013 13:47
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 By: Susan Carley Oliver, December 9th, 2013 13:50
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 By: Susan Carley Oliver, December 9th, 2013 13:51
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 By: Drabkikker, December 9th, 2013 15:39
Yes, it's a sun pillar. No sundogs to be seen in this picture.
#13 By: Drabkikker, December 9th, 2013 15:50
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 By: Joe Castleman, December 9th, 2013 16:04
Same here. I thought that was a Fractal Mr. Punch near the lower right.
#15 By: teapot, December 9th, 2013 21:50
I'll let myself out.
#16 By: Maggie Koerth-Baker, December 14th, 2013 09:05
This topic was automatically closed after 4 days. New replies are no longer allowed.