Thursday, May 08, 2008

Winter and Summer

Winter just won't let go. After several days in the 80s (F), we're back down in the 50s. Last week, the crabapple trees began to flower. But at the same time, there were sundogs in the sky before sunset; sundogs are usually seen in winter here.




Sundogs, Madison, WI




Flowering trees, Beloit, WI

(These are the trees in the front and back of the house I'm in the process of moving to.)

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2 Comments:

Blogger Dave King said...

Fabulous pictures - but sundogs? What be they?

6:05 AM  
Blogger Art Durkee said...

Hi, Dave, thanks for the comments.

Sundogs are refractive lights caused by high-atmosphere ice crystals. They're a similar phenomenon to the rare ring around the moon, in that a layer of small ice crystals high up refracts the light of the sun or moon to create additional images in the sky.

Here's a detailed explanation:

http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/ice/sd.rxml

11:20 PM  

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