Sun halo display with possibly upper Lowitz arc
Taken by Diana Popa on February 6, 2014 @
I took these pictures on February 6th between 11:15 and 11:20 am, from Montreal, Quebec, Canada. According to sun height calculators online, the sun was 26 to 28 degrees above the horizon. It was a moderately cold morning, the temperature was between -10C and -15C, with little wind.
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Camera Used: Canon Canon PowerShot SX40 HS
Exposure Time: 1/3200
Aperture: f/8.0
ISO: 100
Date Taken: 2014:02:06 11:19:25
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Details:
The bright, colorful sundogs of this halo display caught my eye while at work and I dashed outside to take some pictures before they vanished. The whole display was very bright and noticeable, I had to wear sunglasses while taking the pictures. With the naked eye, I noticed the brightening of the top of the 22 deg halo and its concave aspect, which would make it an upper tangent arc. Further processing of the pictures revealed a faint circumzenithal arc, and, to my surprise, a faint whitish arc above the "wings" of the upper tangent arc. Sadly, it's hard to tell this arc apart from the clouds. My close-up pictures of the area didn't capture enough contrast. Is it an upper Lowitz arc?
Photographer's website:
No URL provided.
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